/* roulang page: index */
:root {
            --page-bg: #F5F3ED;
            --deep: #0B0E0A;
            --card: #FFFFFF;
            --panel: #ECEAE2;
            --text: #181B15;
            --muted: #71766B;
            --line: rgba(24, 27, 21, 0.14);
            --line-dark: rgba(255, 255, 255, 0.18);
            --brand: #D7F32D;
            --brand-deep: #B9D41C;
            --gold: #E0A92E;
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --radius-card: 6px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-def: 0 1px 2px rgba(11, 14, 10, 0.05);
            --shadow-hover: 0 8px 30px rgba(11, 14, 10, 0.10);
            --space-section: 96px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--page-bg);
            overflow-x: hidden;
        }

        body.no-scroll {
            overflow: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        ul,
        ol,
        p,
        h1,
        h2,
        h3,
        h4,
        figure,
        blockquote {
            margin: 0;
            padding: 0;
        }

        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
        }

        :focus-visible {
            outline: 3px solid var(--deep);
            outline-offset: 2px;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        body,
        .grid-container {
            --grid-container: 1240px;
        }

        .app-shell {
            min-height: 100vh;
            display: block;
        }

        /* ===== 左侧桌面导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 276px;
            min-height: 100vh;
            background: var(--deep);
            color: #fff;
            display: flex;
            flex-direction: column;
            z-index: 70;
            padding: 0;
        }

        .side-logo {
            height: 90px;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            flex-direction: column;
            padding: 0 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            flex-shrink: 0;
        }

        .side-logo .logo-text {
            display: block;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: #fff;
            line-height: 1.25;
            white-space: nowrap;
        }

        .side-logo .logo-sub {
            display: block;
            font-size: 10px;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.08em;
            margin-top: 6px;
        }

        .side-nav {
            flex: 1 1 auto;
            padding: 20px 12px;
            min-height: 0;
            overflow-y: auto;
        }

        .nav-label {
            font-size: 12px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.36);
            padding: 0 16px 8px;
            letter-spacing: 0.04em;
        }

        .project-nav {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }

        .project-nav .nav-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 16px 0 18px;
            border-left: 3px solid transparent;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.65);
            border-radius: 0 8px 8px 0;
            transition: color .22s ease, background .22s ease;
        }

        .project-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .project-nav .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            border-left-color: var(--brand);
            font-weight: 700;
        }

        .side-foot {
            flex-shrink: 0;
            padding: 18px 24px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .status-line {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            display: inline-block;
            flex-shrink: 0;
        }

        .side-copyright {
            margin-top: 8px;
            font-size: 10px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 主内容区 ===== */
        .main-area {
            margin-left: 276px;
            min-height: 100vh;
        }

        .mobile-topbar {
            display: none;
        }

        .hamburger {
            background: transparent;
            border: 0;
            width: 44px;
            height: 44px;
            padding: 10px;
            cursor: pointer;
            border-radius: 10px;
            display: inline-flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: #fff;
            display: block;
            transition: transform .2s ease, opacity .2s ease;
        }

        .hamburger.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.is-open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .drawer {
            display: none;
        }

        .overlay {
            display: none;
        }

        @media (max-width: 1023.98px) {
            body.has-drawer {
                overflow: hidden;
            }

            .sidebar {
                display: none;
            }

            .main-area {
                margin-left: 0;
                padding-top: 64px;
            }

            .mobile-topbar {
                display: flex;
                align-items: center;
                justify-content: space-between;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 64px;
                background: var(--deep);
                z-index: 65;
                padding: 0 20px;
                box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
            }

            .mobile-logo {
                font-size: 20px;
                font-weight: 800;
                color: #fff;
                letter-spacing: -0.01em;
                display: inline-flex;
                align-items: center;
            }

            .mobile-logo .logo-short {
                color: var(--brand);
            }

            .drawer {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 0;
                left: 0;
                bottom: 0;
                width: min(86vw, 320px);
                background: var(--deep);
                color: #fff;
                z-index: 80;
                transform: translateX(-102%);
                transition: transform .3s ease-out;
                box-shadow: 10px 0 40px rgba(0, 0, 0, 0.2);
                padding: 0;
            }

            .drawer.is-open {
                transform: translateX(0);
            }

            .drawer-logo {
                height: 64px;
                display: flex;
                align-items: center;
                padding: 0 22px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.07);
                font-size: 20px;
                font-weight: 800;
                color: #fff;
            }

            .drawer-nav {
                padding: 20px 14px;
                flex: 1;
            }

            .drawer-nav .project-nav .nav-link {
                min-height: 50px;
                border-left: none;
                position: relative;
                border-radius: 8px;
                padding: 0 14px;
            }

            .drawer-nav .project-nav .nav-link.active {
                background: rgba(255, 255, 255, 0.07);
            }

            .drawer-nav .project-nav .nav-link.active::before {
                content: "";
                position: absolute;
                left: 8px;
                top: 50%;
                transform: translateY(-50%);
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--brand);
            }

            .drawer-nav .project-nav .nav-link.active {
                color: #fff;
                font-weight: 700;
            }

            .drawer-foot {
                padding: 18px 22px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                display: flex;
                align-items: center;
                justify-content: space-between;
                font-size: 12px;
                color: rgba(255, 255, 255, 0.45);
            }

            .drawer-close {
                width: 44px;
                height: 44px;
                border: 0;
                background: transparent;
                cursor: pointer;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                border-radius: 10px;
                color: rgba(255, 255, 255, 0.8);
            }

            .overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.6);
                z-index: 75;
                opacity: 0;
                visibility: hidden;
                transition: opacity .3s ease, visibility .3s ease;
            }

            .overlay.is-open {
                opacity: 1;
                visibility: visible;
            }
        }

        /* ===== 通用排版容器 ===== */
        .zone {
            padding: var(--space-section) 0;
        }

        .zone-head {
            margin-bottom: 42px;
        }

        .wrap {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 48px;
            padding-right: 48px;
        }

        .negative {
            color: var(--muted);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--muted);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .eyebrow .cn {
            color: var(--text);
        }

        .eyebrow .en {
            color: var(--muted);
            letter-spacing: 0.1em;
        }

        .section-title {
            font-size: 44px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
            line-height: 1.2;
        }

        .section-lead {
            margin-top: 14px;
            font-size: 17px;
            line-height: 1.8;
            color: var(--muted);
            max-width: 75ch;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            border-bottom: 1px solid currentColor;
            transition: color .2s ease, border-color .2s ease;
        }

        .text-link:hover {
            color: var(--brand-deep);
            border-color: var(--brand);
        }

        .text-link .arrow {
            display: inline-block;
            transition: transform .2s ease;
        }

        .text-link:hover .arrow {
            transform: translateX(4px);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            transition: background .25s ease-out, color .25s ease-out, transform .25s ease-out, border-color .25s ease-out, box-shadow .25s ease-out;
            text-align: center;
        }

        .btn-primary {
            background: var(--brand);
            color: var(--deep);
            border-color: var(--brand);
        }

        .btn-primary:hover {
            background: var(--brand-deep);
            border-color: var(--brand-deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(185, 212, 28, 0.22);
        }

        .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.45);
        }

        .btn-secondary:hover {
            background: #fff;
            color: var(--deep);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-light {
            background: var(--card);
            color: var(--deep);
            border-color: var(--card);
        }

        .btn-light:hover {
            background: var(--page-bg);
            border-color: var(--page-bg);
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--deep);
            border-color: rgba(24, 27, 21, 0.52);
        }

        .btn-outline-dark:hover {
            border-color: var(--deep);
            background: transparent;
            transform: translateY(-2px);
        }

        /* ===== Hero ===== */
        .hero {
            background-color: var(--deep);
            background-image: linear-gradient(rgba(11, 14, 10, 0.88), rgba(11, 14, 10, 0.94)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding: 104px 0 56px;
        }

        .hero-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 25px;
        }

        .hero-eyebrow .eyebrow-dot {
            width: 8px;
            height: 8px;
            background: var(--brand);
            border-radius: 2px;
        }

        .hero-eyebrow .sep {
            opacity: 0.4;
        }

        .hero h1 {
            font-size: 72px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.12;
            max-width: 13ch;
            color: #fff;
            margin-bottom: 22px;
        }

        .hero-sub {
            max-width: 720px;
            font-size: 18px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.72);
            margin-top: 0;
            margin-bottom: 40px;
        }

        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 60px;
        }

        .hero-data {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 30px;
            max-width: 720px;
        }

        .data-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .data-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--brand);
        }

        .data-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.55;
        }

        .data-note {
            display: block;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.46);
            margin-top: 2px;
        }

        /* ===== 价值主张 ===== */
        .value-zone {
            background: var(--page-bg);
        }

        .value-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.6fr;
            gap: 40px;
        }

        .value-aside .eyebrow {
            color: var(--text);
        }

        .value-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            max-width: 16ch;
            margin: 18px 0 14px;
        }

        .value-caption {
            color: var(--muted);
            line-height: 1.8;
            max-width: 30ch;
            font-size: 16px;
        }

        .value-items {
            display: flex;
            flex-direction: column;
        }

        .value-item {
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: 22px;
            padding: 32px 0;
            border-bottom: 1px solid var(--line);
        }

        .value-item:first-child {
            padding-top: 8px;
        }

        .value-item:last-child {
            border-bottom: 0;
        }

        .value-order {
            font-size: 15px;
            font-weight: 700;
            color: var(--deep);
            letter-spacing: 0.02em;
        }

        .value-order .slash {
            color: var(--brand-deep);
        }

        .value-body h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
        }

        .value-body p {
            max-width: 58ch;
            color: var(--muted);
            line-height: 1.8;
            font-size: 16px;
        }

        .value-body .mini-tags {
            margin-top: 12px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            min-height: 26px;
            padding: 0 14px;
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            font-size: 12px;
            line-height: 1;
            color: var(--text);
            background: transparent;
        }

        .tag.is-green {
            color: var(--brand-deep);
            border-color: rgba(185, 212, 28, 0.6);
        }

        .tag.is-gold {
            color: var(--gold);
            border-color: rgba(224, 169, 46, 0.54);
        }

        /* ===== 功能区 ===== */
        .function-zone {
            background: var(--page-bg);
        }

        .function-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-bottom: 24px;
        }

        .function-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 32px;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
            position: relative;
        }

        .function-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(24, 27, 21, 0.24);
        }

        .function-card .card-index {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 32px;
        }

        .function-card .card-icon {
            width: 42px;
            height: 42px;
            background: var(--page-bg);
            border: 1px solid var(--line);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--deep);
        }

        .function-card h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .function-card p {
            color: var(--muted);
            line-height: 1.8;
            font-size: 16px;
            margin-bottom: 26px;
        }

        .function-card .more {
            margin-top: auto;
        }

        .function-wide {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1.25fr 0.75fr;
        }

        .function-wide .wide-content {
            padding: 42px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .function-wide .wide-content .section-tag {
            font-size: 12px;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 12px;
        }

        .function-wide .wide-content h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .function-wide .wide-content p {
            max-width: 55ch;
            color: var(--muted);
            margin-bottom: 26px;
        }

        .function-wide .wide-img {
            min-height: 260px;
        }

        .function-wide .wide-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 场景 ===== */
        .scenario-zone {
            background: var(--deep);
            color: #fff;
        }

        .scenario-zone .section-title,
        .scenario-zone .eyebrow .cn {
            color: #fff;
        }

        .scenario-zone .eyebrow .en {
            color: rgba(255, 255, 255, 0.5);
        }

        .scenario-list {
            display: flex;
            flex-direction: column;
        }

        .scenario-row {
            display: grid;
            grid-template-columns: 0.7fr 1.3fr;
            gap: 44px;
            align-items: center;
            padding: 56px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.13);
        }

        .scenario-row:last-child {
            border-bottom: 0;
            padding-bottom: 0;
        }

        .scenario-row.is-reverse .scenario-image {
            order: 2;
        }

        .scenario-image {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: rgba(255, 255, 255, 0.04);
        }

        .scenario-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .scenario-label {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(11, 14, 10, 0.7);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 8px 12px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-pill);
            backdrop-filter: blur(6px);
        }

        .scenario-text h3 {
            color: #fff;
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .scenario-text .desc {
            color: rgba(255, 255, 255, 0.66);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .scenario-flow {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.54);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .scenario-flow strong {
            color: var(--brand);
            font-weight: 700;
        }

        .scenario-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand);
            font-size: 14px;
            font-weight: 600;
            border-bottom: 1px solid rgba(215, 243, 45, 0.5);
            transition: border-color .2s ease, color .2s ease;
        }

        .scenario-link:hover {
            color: #fff;
            border-color: #fff;
        }

        /* ===== 案例区 ===== */
        .case-zone {
            background: var(--page-bg);
        }

        .case-list {
            display: flex;
            flex-direction: column;
            margin-top: 48px;
        }

        .case-row {
            display: grid;
            grid-template-columns: 140px 38px 1fr;
            gap: 24px;
            padding: 36px 0;
            border-bottom: 1px solid var(--line);
            position: relative;
        }

        .case-row::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 1px;
        }

        .case-date {
            font-size: 13px;
            color: var(--muted);
            font-weight: 600;
            line-height: 1.5;
        }

        .case-mark {
            width: 10px;
            height: 10px;
            background: var(--brand);
            border: 1px solid rgba(185, 212, 28, 0.6);
            transform: translateY(8px);
        }

        .case-body .case-title-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
        }

        .case-body h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
        }

        .case-body .brief {
            max-width: 720px;
            color: var(--muted);
            line-height: 1.8;
            margin-top: 12px;
        }

        .case-data {
            margin-top: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: var(--text);
            align-items: center;
        }

        .case-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .case-note {
            font-size: 12px;
            color: var(--muted);
            margin-top: 12px;
            background: var(--panel);
            display: inline-flex;
            align-items: center;
            padding: 2px 12px;
            border-radius: var(--radius-pill);
        }

        /* ===== 服务档位 ===== */
        .plan-zone {
            background: #ECE9E1;
        }

        .plan-grid {
            display: grid;
            grid-template-columns: 34% 66%;
            gap: 30px;
            align-items: stretch;
        }

        .plan-intro {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .plan-intro .section-title {
            font-size: 38px;
        }

        .plan-intro p {
            margin-top: 18px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 34ch;
        }

        .plan-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .plan-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            flex-direction: column;
        }

        .plan-card--green {
            background: var(--brand);
            border-color: var(--brand);
            color: var(--deep);
        }

        .plan-card--green p,
        .plan-card--green .plan-feature li {
            color: rgba(11, 14, 10, 0.72);
        }

        .plan-type {
            font-size: 13px;
            font-weight: 700;
            color: var(--muted);
            margin-bottom: 12px;
        }

        .plan-card--green .plan-type {
            color: rgba(11, 14, 10, 0.6);
        }

        .plan-price {
            font-size: 34px;
            font-weight: 800;
            color: var(--deep);
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .plan-price-sub {
            font-size: 13px;
            color: var(--muted);
        }

        .plan-card--green .plan-price-sub {
            color: rgba(11, 14, 10, 0.6);
        }

        .plan-label-text {
            font-size: 14px;
            font-weight: 600;
            margin-top: 22px;
            margin-bottom: 12px;
        }

        .plan-feature {
            list-style: none;
            margin: 0 0 28px;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .plan-feature li {
            position: relative;
            padding-left: 18px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.75;
        }

        .plan-feature li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 11px;
            width: 6px;
            height: 6px;
            background: var(--deep);
        }

        .plan-card--green .plan-feature li::before {
            background: rgba(11, 14, 10, 0.6);
        }

        .plan-card .btn {
            margin-top: auto;
        }

        .plan-bottom {
            display: flex;
            justify-content: flex-end;
            padding-top: 30px;
            border-top: 1px solid var(--line);
            margin-top: 36px;
        }

        .plan-bottom a {
            border-bottom: 1px solid currentColor;
            color: var(--text);
            font-weight: 600;
            transition: color .2s ease, border-color .2s ease;
        }

        .plan-bottom a:hover {
            color: var(--brand-deep);
            border-color: var(--brand);
        }

        /* ===== 最新信息 / CMS 列表 ===== */
        .news-zone {
            background: var(--page-bg);
        }

        .news-list {
            border-top: 1px solid var(--line);
        }

        .news-row {
            display: grid;
            grid-template-columns: 160px 1fr auto;
            gap: 24px;
            align-items: center;
            padding: 24px 0;
            border-bottom: 1px solid var(--line);
            transition: background .2s ease;
        }

        .news-row:hover .news-title a {
            border-bottom-color: var(--brand);
        }

        .news-thumb {
            width: 160px;
            height: 96px;
            background: var(--panel);
            border-radius: 6px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-thumb-empty {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--muted);
            font-size: 11px;
            background: var(--panel);
        }

        .news-content {
            min-width: 0;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            font-size: 12px;
            color: var(--muted);
        }

        .news-title {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 6px;
            color: var(--text);
        }

        .news-title a {
            border-bottom: 2px solid transparent;
            transition: border-color .2s ease;
        }

        .news-summary {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .news-read {
            color: var(--text);
            font-size: 14px;
            font-weight: 600;
            border-bottom: 1px solid var(--line);
            transition: color .2s ease, border-color .2s ease;
            white-space: nowrap;
        }

        .news-read:hover {
            color: var(--brand-deep);
            border-color: var(--brand);
        }

        .news-empty {
            padding: 40px 0;
            text-align: center;
            color: var(--muted);
            border-bottom: 1px solid var(--line);
            font-size: 15px;
        }

        /* ===== FAQ ===== */
        .faq-zone {
            background: var(--page-bg);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 0.85fr 1.35fr;
            gap: 50px;
        }

        .faq-title {
            font-size: 30px;
            font-weight: 800;
            margin-top: 14px;
            line-height: 1.4;
        }

        .faq-note {
            margin-top: 20px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            max-width: 34ch;
        }

        .faq-list {
            border-top: 1px solid var(--line);
        }

        details.faq-item {
            border-bottom: 1px solid var(--line);
            padding: 6px 0;
        }

        details.faq-item summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            list-style: none;
            cursor: pointer;
            padding: 18px 0;
            font-size: 16px;
            font-weight: 700;
            line-height: 1.6;
            color: var(--text);
            transition: color .2s ease;
        }

        details.faq-item summary::-webkit-details-marker {
            display: none;
        }

        details.faq-item summary:hover {
            color: var(--brand-deep);
        }

        details.faq-item summary::after {
            content: "+";
            font-size: 22px;
            line-height: 1;
            color: var(--muted);
            transition: transform .25s ease;
            flex-shrink: 0;
            font-weight: 400;
        }

        details.faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--brand-deep);
        }

        details.faq-item .faq-answer {
            padding: 0 0 22px;
            color: #4C5045;
            font-size: 15px;
            line-height: 1.9;
            max-width: 66ch;
        }

        /* ===== CTA ===== */
        .cta-zone {
            background: var(--deep);
            color: #fff;
            padding: 0;
        }

        .cta-wrap {
            max-width: 1240px;
            margin: 0 auto;
            padding: 88px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-title {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: #fff;
            max-width: 18ch;
        }

        .cta-desc {
            margin-top: 12px;
            color: rgba(255, 255, 255, 0.64);
            max-width: 45ch;
            font-size: 15px;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--deep);
            color: #fff;
            padding: 48px 0 28px;
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.9fr;
            gap: 50px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo-text {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
        }

        .footer-desc {
            margin-top: 14px;
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 38ch;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, 0.9);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a,
        .footer-links span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            transition: color .2s ease;
            line-height: 1.6;
        }

        .footer-links a:hover {
            color: var(--brand);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.32);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.32);
        }

        .footer-safe {
            max-width: 52ch;
        }

        /* ===== Foundation 辅助覆盖 ===== */
        .grid-container {
            max-width: 1240px;
        }

        .grid-container.padded {
            padding-left: 48px;
            padding-right: 48px;
        }

        .button {
            font-family: var(--font);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1240px) {
            .plan-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .plan-intro {
                max-width: 720px;
            }
        }

        @media (max-width: 1023.98px) {
            .sidebar {
                display: none;
            }

            .main-area {
                margin-left: 0;
                padding-top: 64px;
            }

            .mobile-topbar {
                display: flex;
            }

            .hero {
                padding: 72px 0 48px;
            }

            .hero h1 {
                font-size: 48px;
            }

            .zone {
                padding: 64px 0;
            }

            .wrap,
            .hero-inner,
            .cta-wrap,
            .footer-inner {
                padding-left: 28px;
                padding-right: 28px;
            }

            .value-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .value-aside {
                margin-bottom: 12px;
            }

            .value-title {
                max-width: 28ch;
                font-size: 28px;
            }

            .function-grid {
                grid-template-columns: 1fr 1fr;
            }

            .function-wide {
                grid-template-columns: 1fr;
            }

            .function-wide .wide-img {
                min-height: 0;
                height: 220px;
            }

            .news-row {
                grid-template-columns: 120px 1fr;
            }

            .news-thumb {
                width: 120px;
                height: 80px;
            }

            .news-read {
                display: none;
            }

            .faq-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .cta-title {
                font-size: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .scenario-row,
            .scenario-row.is-reverse {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .scenario-row.is-reverse .scenario-image {
                order: 0;
            }

            .case-row {
                grid-template-columns: 110px 20px 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 767.98px) {
            .wrap,
            .hero-inner,
            .cta-wrap,
            .footer-inner {
                padding-left: 20px;
                padding-right: 20px;
            }

            .hero h1 {
                font-size: 40px;
            }

            .hero-sub {
                font-size: 16px;
            }

            .hero-data {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .section-title {
                font-size: 34px;
            }

            .value-items {
                gap: 0;
            }

            .value-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 28px 0;
            }

            .value-order {
                margin-bottom: 4px;
            }

            .function-grid {
                grid-template-columns: 1fr;
            }

            .function-card {
                min-height: 0;
                padding: 26px;
            }

            .function-wide .wide-content {
                padding: 28px;
            }

            .function-wide .wide-content h3 {
                font-size: 24px;
            }

            .scenario-text h3 {
                font-size: 22px;
            }

            .scenario-flow {
                font-size: 13px;
            }

            .case-row {
                grid-template-columns: 1fr;
                gap: 10px;
                padding: 26px 0;
            }

            .case-mark {
                display: none;
            }

            .case-date {
                font-size: 12px;
            }

            .case-body .case-title-row {
                align-items: flex-start;
            }

            .case-tags {
                margin-top: 12px;
            }

            .plan-cards {
                grid-template-columns: 1fr;
            }

            .plan-grid {
                gap: 28px;
            }

            .plan-intro .section-title {
                font-size: 32px;
            }

            .news-row {
                grid-template-columns: 96px 1fr;
                gap: 16px;
                padding: 18px 0;
            }

            .news-thumb {
                width: 96px;
                height: 72px;
            }

            .news-title {
                font-size: 16px;
            }

            .news-summary {
                display: none;
            }

            .news-meta {
                flex-wrap: wrap;
                gap: 6px;
            }

            .news-meta .tag {
                min-height: 22px;
                padding: 0 8px;
                font-size: 11px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }

            .cta-wrap {
                padding-top: 64px;
                padding-bottom: 64px;
            }

            .cta-title {
                font-size: 28px;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .hero-cta .btn {
                min-width: 0;
                width: 100%;
            }

            .hero-cta {
                flex-direction: column;
                gap: 12px;
            }

            .hero {
                padding-top: 56px;
            }
        }

        @media (max-width: 520px) {
            .value-title {
                font-size: 24px;
            }

            .value-body h3 {
                font-size: 20px;
            }

            .value-body p {
                font-size: 15px;
            }

            .section-title {
                font-size: 30px;
            }

            .section-lead {
                font-size: 15px;
            }

            .tag {
                min-height: 24px;
                padding: 0 10px;
                font-size: 11px;
            }

            .plan-price {
                font-size: 29px;
            }

            .plan-bottom {
                justify-content: flex-start;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: article */
:root {
            --bg-page: #F5F3ED;
            --bg-dark: #0B0E0A;
            --card-bg: #FFFFFF;
            --panel-bg: #ECEAE2;
            --ink: #181B15;
            --muted: #71766B;
            --line-light: rgba(24, 27, 21, 0.14);
            --line-dark: rgba(255, 255, 255, 0.18);
            --accent: #D7F32D;
            --accent-dark: #B9D41C;
            --amber: #E0A92E;
            --radius-card: 6px;
            --radius-btn: 10px;
            --container-max: 1240px;
            --footer-bg: #0B0E0A;
            --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-page);
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body.no-scroll {
            overflow: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style-position: outside;
        }

        :focus-visible {
            outline: 2px solid var(--bg-dark);
            outline-offset: 2px;
        }

        .main-app {
            width: 100%;
            min-height: 100vh;
        }

        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 276px;
            background: var(--bg-dark);
            display: flex;
            flex-direction: column;
            z-index: 80;
            transform: translateX(0);
            transition: transform 0.28s var(--ease);
        }

        .sidebar-brand {
            display: flex;
            flex-direction: column;
            justify-content: center;
            height: 96px;
            padding: 0 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-brand .logo-main {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .sidebar-brand .logo-sub {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.12em;
            margin-top: 5px;
        }

        .sidebar-nav-wrap {
            flex: 1;
            padding: 20px 0 16px;
        }

        .project-nav {
            display: flex;
            flex-direction: column;
        }

        .project-nav a {
            display: flex;
            align-items: center;
            justify-content: flex-start;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.65);
            border-left: 3px solid transparent;
            transition: background-color 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
            text-decoration: none;
        }

        .project-nav a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.06);
        }

        .project-nav a.active {
            color: #FFFFFF;
            border-left-color: var(--accent);
            background: rgba(255, 255, 255, 0.09);
        }

        .sidebar-status {
            padding: 20px 28px 26px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .status-line {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
        }

        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }

        .status-copy {
            margin-top: 10px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        .mobile-topbar {
            display: none;
        }

        .mobile-topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .mobile-logo {
            color: #FFFFFF;
            font-size: 19px;
            font-weight: 800;
            letter-spacing: -0.01em;
        }

        .hamburger {
            display: inline-flex;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 44px;
            height: 44px;
            align-items: center;
            border-radius: 10px;
            transition: background-color 0.2s var(--ease);
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #FFFFFF;
            border-radius: 0;
            transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
        }

        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .sidebar-close {
            display: none;
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            z-index: 75;
            background: rgba(0, 0, 0, 0.6);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s var(--ease);
        }

        .drawer-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        .content-wrap {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left 0.3s var(--ease);
        }

        .article-root {
            width: 100%;
            flex: 1;
        }

        .article-container {
            max-width: 1080px;
            margin: 0 auto;
            padding: 48px 32px 96px;
        }

        .breadcrumb-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 36px;
        }

        .breadcrumb-row a {
            color: var(--muted);
            transition: color 0.2s var(--ease);
        }

        .breadcrumb-row a:hover {
            color: var(--ink);
        }

        .breadcrumb-sep {
            color: rgba(24, 27, 21, 0.25);
        }

        .breadcrumb-current {
            color: var(--ink);
            font-weight: 600;
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-head {
            max-width: 860px;
            margin-bottom: 28px;
        }

        .article-title {
            font-size: clamp(38px, 5vw, 52px);
            line-height: 1.24;
            letter-spacing: -0.02em;
            font-weight: 800;
            color: var(--ink);
            margin: 0;
        }

        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            font-size: 14px;
            color: var(--muted);
            margin-top: 20px;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .meta-item i {
            font-size: 13px;
            color: var(--muted);
        }

        .meta-divider {
            width: 1px;
            height: 14px;
            background: var(--line-light);
        }

        .article-rule {
            border: 0;
            border-top: 1px solid var(--line-light);
            margin: 34px 0 42px;
        }

        .article-cover {
            position: relative;
            width: 100%;
            max-width: 960px;
            margin: 0 auto 48px;
            border-radius: 6px;
            overflow: hidden;
        }

        .article-cover img {
            width: 100%;
            height: auto;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .article-cover-empty {
            aspect-ratio: 16 / 9;
            width: 100%;
            background: var(--panel-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--muted);
            font-size: 14px;
            border: 1px solid var(--line-light);
            border-radius: 6px;
        }

        .article-body-wrap {
            max-width: 720px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--ink);
            word-break: break-word;
        }

        .article-content > * + * {
            margin-top: 1.35em;
        }

        .article-content p {
            color: var(--ink);
            font-size: 17px;
            line-height: 1.9;
        }

        .article-content h2 {
            font-size: 27px;
            font-weight: 800;
            line-height: 1.4;
            margin-top: 48px;
            margin-bottom: 12px;
            color: var(--ink);
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 10px;
            color: var(--ink);
            line-height: 1.5;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.4em;
            line-height: 1.85;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.55em;
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent);
            background: var(--panel-bg);
            border-radius: 0 6px 6px 0;
            margin: 28px 0;
            padding: 16px 22px;
            color: #4C5045;
            font-size: 16px;
            line-height: 1.8;
        }

        .article-content blockquote p {
            margin: 0;
        }

        .article-content code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            background: var(--panel-bg);
            border: 1px solid var(--line-light);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.92em;
        }

        .article-content img {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin: 30px 0 8px;
        }

        .article-content figcaption {
            font-size: 13px;
            color: var(--muted);
            text-align: center;
            margin-top: 6px;
        }

        .article-content a {
            color: var(--ink);
            text-decoration: underline;
            text-decoration-color: var(--accent);
            text-underline-offset: 3px;
            transition: color 0.2s var(--ease);
        }

        .article-content a:hover {
            color: var(--muted);
        }

        .not-found-box {
            border: 1px solid var(--line-light);
            background: var(--card-bg);
            padding: 42px 36px;
            border-radius: 6px;
            text-align: center;
        }

        .not-found-box p {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 18px;
        }

        .not-found-box a,
        .return-link-hover {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            background: var(--ink);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            transition: background-color 0.22s var(--ease), transform 0.22s var(--ease);
        }

        .not-found-box a:hover,
        .return-link-hover:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            color: var(--bg-dark);
        }

        .article-tags {
            max-width: 720px;
            margin: 46px auto 0;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 28px;
            border-top: 1px solid var(--line-light);
        }

        .article-tags-label {
            font-size: 12px;
            font-weight: 700;
            color: var(--muted);
            letter-spacing: 0.06em;
            margin-right: 6px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 30px;
            padding: 0 14px;
            border: 1px solid var(--line-light);
            border-radius: 999px;
            font-size: 12px;
            color: var(--ink);
            background: transparent;
            transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease);
            text-decoration: none;
        }

        .tag-pill:hover {
            border-color: var(--ink);
        }

        .article-related {
            max-width: 720px;
            margin: 90px auto 0;
            border-top: 1px solid var(--line-light);
            padding-top: 44px;
        }

        .related-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 24px;
            letter-spacing: -0.01em;
        }

        .related-list {
            width: 100%;
        }

        .related-item-row {
            display: block;
            padding: 20px 6px;
            border-bottom: 1px solid var(--line-light);
            transition: background-color 0.18s var(--ease), padding-left 0.2s var(--ease);
            text-decoration: none;
        }

        .related-item-row:hover {
            background: rgba(215, 243, 45, 0.08);
            padding-left: 12px;
        }

        .related-item-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 26px;
        }

        .related-item-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--ink);
            transition: color 0.2s var(--ease);
        }

        .related-item-row:hover .related-item-name {
            color: var(--ink);
            text-decoration: underline;
            text-decoration-color: var(--accent);
            text-underline-offset: 4px;
        }

        .related-item-meta {
            font-size: 12px;
            color: var(--muted);
            white-space: nowrap;
        }

        .related-item-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
            margin-top: 6px;
            max-width: 520px;
        }

        .article-return {
            max-width: 720px;
            margin: 42px auto 0;
            display: flex;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
        }

        .article-return a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--ink);
            text-decoration: underline;
            text-decoration-color: transparent;
            text-underline-offset: 4px;
            transition: text-decoration-color 0.2s var(--ease), color 0.2s var(--ease);
        }

        .article-return a:hover {
            text-decoration-color: var(--accent);
            color: var(--ink);
        }

        .article-return a i {
            font-size: 14px;
        }

        .footer {
            background: var(--footer-bg);
            color: #FFFFFF;
            padding: 68px 0 40px;
            width: 100%;
        }

        .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
        }

        .footer-brand .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.01em;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 36ch;
            margin-top: 16px;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 18px;
            letter-spacing: 0.04em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a,
        .footer-links span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            transition: color 0.22s var(--ease);
            text-decoration: none;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 54px;
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (min-width: 1024px) {
            .content-wrap {
                margin-left: 276px;
            }
        }

        @media (max-width: 1023.98px) {
            .app-sidebar {
                width: min(86vw, 340px);
                transform: translateX(-105%);
                box-shadow: 16px 0 36px rgba(0, 0, 0, 0.22);
            }

            .app-sidebar.open {
                transform: translateX(0);
            }

            .sidebar-close {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                position: absolute;
                top: 18px;
                right: 16px;
                width: 42px;
                height: 42px;
                color: rgba(255, 255, 255, 0.7);
                font-size: 24px;
                border-radius: 10px;
                transition: background-color 0.22s var(--ease), color 0.22s var(--ease);
            }

            .sidebar-close:hover {
                background: rgba(255, 255, 255, 0.1);
                color: #FFFFFF;
            }

            .mobile-topbar {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 64px;
                padding: 0 20px;
                background: var(--bg-dark);
                position: sticky;
                top: 0;
                z-index: 65;
            }

            .content-wrap {
                min-height: auto;
            }

            .article-container {
                padding: 36px 20px 64px;
            }

            .article-title {
                font-size: 36px;
            }

            .breadcrumb-row {
                margin-bottom: 26px;
            }

            .footer-inner {
                padding: 0 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 639.98px) {
            .article-container {
                padding-left: 20px;
                padding-right: 20px;
                padding-bottom: 48px;
            }

            .breadcrumb-row {
                font-size: 12px;
                gap: 6px;
            }

            .article-title {
                font-size: 30px;
                line-height: 1.3;
            }

            .article-meta-row {
                font-size: 13px;
                gap: 10px;
            }

            .article-cover-empty {
                aspect-ratio: 16 / 10;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.8;
            }

            .article-content p {
                font-size: 16px;
            }

            .related-item-top {
                flex-direction: column;
                gap: 8px;
            }

            .related-item-meta {
                white-space: normal;
                font-size: 12px;
            }

            .footer-inner {
                padding: 0 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #F5F3ED;
            --bg-paper: #fff;
            --panel: #ECEAE2;
            --bg-dark: #0B0E0A;
            --ink: #181B15;
            --ink-soft: #4C5045;
            --muted: #71766B;
            --line: rgba(24, 27, 21, 0.14);
            --line-light: rgba(255, 255, 255, 0.18);
            --accent: #D7F32D;
            --accent-deep: #B9D41C;
            --gold: #E0A92E;
            --radius: 6px;
            --radius-btn: 10px;
            --shadow: 0 1px 2px rgba(11, 14, 10, 0.05);
            --shadow-lift: 0 8px 30px rgba(11, 14, 10, 0.10);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        html,
        body {
            overflow-x: hidden;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--ink);
            font-size: 17px;
            line-height: 1.8;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        a:hover {
            color: inherit;
        }

        button,
        summary {
            font-family: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--ink);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .site-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 80;
            width: 276px;
            background: var(--bg-dark);
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
            padding: 42px 28px 30px;
            color: #fff;
        }

        .brand-wrap {
            display: flex;
            flex-direction: column;
            gap: 7px;
            padding: 0 8px;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .brand-sub {
            font-size: 10px;
            letter-spacing: 0.24em;
            color: rgba(255, 255, 255, 0.42);
        }

        .project-nav {
            margin: 44px 0 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .project-nav .nav-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 14px;
            border-radius: var(--radius);
            color: rgba(255, 255, 255, 0.65);
            font-weight: 600;
            font-size: 16px;
            position: relative;
            transition: color 0.25s ease-out, background 0.25s ease-out;
        }

        .project-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.07);
        }

        .project-nav .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .sidebar-status {
            margin-top: auto;
            color: rgba(255, 255, 255, 0.4);
            font-size: 12px;
            line-height: 1.8;
            padding: 20px 8px 0;
        }

        .status-line {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .status-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
            flex: 0 0 auto;
        }

        .content-main {
            margin-left: 276px;
            min-width: 0;
            min-height: 100vh;
        }

        .page-section {
            padding: 96px 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--muted);
            margin-bottom: 18px;
        }

        .section-tag.light {
            color: rgba(255, 255, 255, 0.58);
        }

        .mobile-topbar {
            display: none;
        }

        .mobile-drawer,
        .drawer-overlay {
            display: none;
        }

        .category-hero {
            background: var(--bg-dark);
            color: #fff;
            padding: 112px 0 88px;
            position: relative;
            border-bottom: 1px solid var(--line-light);
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-position: center 20%;
            background-repeat: no-repeat;
            background-size: cover;
            opacity: 0.13;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            letter-spacing: 0.16em;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .eyebrow::before {
            content: "";
            width: 24px;
            height: 1px;
            background: var(--accent);
        }

        .category-hero h1 {
            font-size: 72px;
            line-height: 1.05;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin: 0 0 28px;
            color: #fff;
        }

        .category-hero .lead {
            color: rgba(255, 255, 255, 0.76);
            font-size: 19px;
            line-height: 1.85;
            max-width: 62ch;
            margin: 0;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 40px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 50px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            line-height: 1;
            transition: background 0.25s ease-out, transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out, color 0.25s ease-out;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--ink);
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background: var(--accent-deep);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(24, 27, 21, 0.4);
            color: var(--ink);
        }

        .btn-ghost:hover {
            border-color: var(--accent-deep);
            color: var(--ink);
        }

        .btn-ghost-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.46);
            color: #fff;
        }

        .btn-ghost-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .hero-notes {
            display: flex;
            flex-wrap: wrap;
            gap: 18px 34px;
            margin-top: 64px;
            padding-top: 24px;
            border-top: 1px solid var(--line-light);
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            list-style: none;
            padding-left: 0;
        }

        .hero-notes strong {
            color: rgba(255, 255, 255, 0.86);
            font-weight: 600;
            margin-right: 5px;
        }

        .anchor-strip {
            border-bottom: 1px solid var(--line);
            background: var(--bg-paper);
        }

        .anchor-strip .container {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            padding-top: 18px;
            padding-bottom: 18px;
        }

        .anchor-strip a {
            font-size: 15px;
            font-weight: 600;
            color: var(--muted);
            line-height: 1.6;
            border-bottom: 1px solid transparent;
            transition: color 0.25s ease-out, border-color 0.25s ease-out;
        }

        .anchor-strip a:hover {
            color: var(--ink);
            border-bottom-color: var(--accent-deep);
        }

        .module-list {
            border-top: 1px solid var(--line);
        }

        .module-row {
            display: grid;
            grid-template-columns: 64px minmax(0, 1fr) 120px;
            align-items: start;
            gap: 20px;
            border-bottom: 1px solid var(--line);
            padding: 30px 0;
            transition: background 0.25s ease-out;
        }

        .module-row .index {
            font-size: 14px;
            color: var(--muted);
            font-weight: 700;
            letter-spacing: 0.06em;
        }

        .module-row h3 {
            font-size: 22px;
            line-height: 1.4;
            font-weight: 700;
            margin: 0 0 6px;
        }

        .module-row p {
            margin: 0;
            color: var(--muted);
            line-height: 1.8;
            font-size: 17px;
            max-width: 72ch;
        }

        .text-link {
            font-weight: 700;
            font-size: 15px;
            color: var(--ink);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-bottom: 1px solid rgba(24, 27, 21, 0.28);
            line-height: 1.5;
            padding-bottom: 2px;
            transition: border-color 0.25s ease-out, color 0.25s ease-out;
        }

        .text-link:hover {
            border-bottom-color: var(--accent-deep);
            color: var(--ink);
        }

        .section-intro {
            display: grid;
            grid-template-columns: minmax(0, 1fr);
            gap: 18px;
            max-width: 760px;
            margin-bottom: 52px;
        }

        .section-intro h2 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -0.015em;
            margin: 0;
        }

        .section-intro p {
            margin: 0;
            color: var(--muted);
            line-height: 1.85;
            max-width: 68ch;
        }

        .paper-section {
            background: var(--bg-paper);
        }

        .pair-grid {
            margin: 0 -24px;
        }

        .pair-grid>.cell {
            padding-left: 24px;
            padding-right: 24px;
        }

        .pair-grid+.pair-grid {
            margin-top: 90px;
        }

        .pair-media {
            overflow: hidden;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            aspect-ratio: 4 / 3;
            background: var(--panel);
        }

        .pair-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }

        .pair-copy {
            padding: 10px 0;
        }

        .pair-copy .piece-index {
            display: block;
            color: var(--gold);
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0.1em;
            margin-bottom: 14px;
        }

        .pair-copy h3 {
            font-size: 28px;
            line-height: 1.35;
            font-weight: 800;
            margin: 0 0 18px;
            letter-spacing: -0.01em;
        }

        .pair-copy p {
            color: var(--muted);
            font-size: 17px;
            line-height: 1.9;
            margin: 0 0 16px;
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 26px 0 0;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--ink-soft);
            font-size: 16px;
            line-height: 1.7;
            padding: 7px 0;
        }

        .check-list li::before {
            content: "";
            flex: 0 0 7px;
            width: 7px;
            height: 7px;
            background: var(--accent-deep);
            margin-top: 13px;
            border-radius: 1px;
        }

        .accent-banner {
            margin-top: 72px;
            background: var(--accent);
            border-radius: var(--radius);
            padding: 36px 44px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            color: var(--ink);
        }

        .accent-banner p {
            font-size: 18px;
            font-weight: 700;
            margin: 0;
            line-height: 1.7;
            max-width: 64ch;
        }

        .accent-banner a {
            flex: 0 0 auto;
            white-space: nowrap;
            border-bottom: 2px solid var(--ink);
            font-weight: 800;
            padding-bottom: 3px;
            transition: opacity 0.25s ease-out;
        }

        .accent-banner a:hover {
            opacity: 0.7;
        }

        .dark-scenarios {
            background: var(--bg-dark);
            color: #fff;
            padding: 96px 0;
        }

        .scenario-row {
            display: grid;
            grid-template-columns: 90px minmax(0, 1fr);
            gap: 34px;
            padding: 38px 0;
            border-top: 1px solid var(--line-light);
        }

        .scenario-row:last-child {
            border-bottom: 1px solid var(--line-light);
        }

        .scenario-index {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .scenario-content h3 {
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .scenario-content p {
            color: rgba(255, 255, 255, 0.66);
            margin: 0 0 14px;
            max-width: 72ch;
            line-height: 1.8;
        }

        .scenario-route {
            display: inline-flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            color: rgba(255, 255, 255, 0.82);
            font-size: 13px;
            font-weight: 600;
        }

        .scenario-route span {
            color: var(--accent);
        }

        .principle-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 24px;
        }

        .principle-card {
            background: var(--bg-paper);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 32px 30px;
            box-shadow: var(--shadow);
            transition: transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
        }

        .principle-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lift);
            border-color: rgba(24, 27, 21, 0.24);
        }

        .principle-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin: 0 0 10px;
            line-height: 1.45;
        }

        .principle-card p {
            margin: 0;
            color: var(--muted);
            font-size: 16px;
            line-height: 1.8;
        }

        .faq-section {
            padding: 96px 0;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 320px minmax(0, 1fr);
            gap: 64px;
            align-items: start;
        }

        .faq-title h2 {
            margin: 0 0 14px;
            font-size: 40px;
            line-height: 1.25;
            font-weight: 800;
            letter-spacing: -0.015em;
        }

        .faq-title p {
            color: var(--muted);
            margin: 0;
            max-width: 28ch;
            line-height: 1.8;
        }

        details.faq-item {
            border-bottom: 1px solid var(--line);
            padding: 5px 0;
        }

        details.faq-item+details.faq-item {
            border-top: none;
        }

        .faq-item summary {
            cursor: pointer;
            font-size: 17px;
            line-height: 1.6;
            font-weight: 700;
            color: var(--ink);
            padding: 22px 34px 22px 0;
            position: relative;
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "+";
            position: absolute;
            right: 2px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 26px;
            font-weight: 300;
            color: var(--muted);
            line-height: 1;
            transition: transform 0.25s ease-out, color 0.25s ease-out;
        }

        details[open].faq-item summary::after {
            content: "−";
            color: var(--accent-deep);
        }

        .faq-item[open] summary {
            color: var(--ink);
        }

        .faq-item p {
            margin: 0;
            padding: 0 44px 26px 0;
            color: var(--ink-soft);
            font-size: 16px;
            line-height: 1.8;
            max-width: 72ch;
        }

        .related-zone {
            padding: 24px 0 96px;
        }

        .related-zone .related-inner {
            border-top: 1px solid var(--line);
            padding-top: 34px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 26px;
        }

        .related-zone .related-label {
            font-size: 14px;
            font-weight: 800;
            color: var(--muted);
            letter-spacing: 0.04em;
        }

        .related-zone .related-link {
            font-weight: 700;
            color: var(--ink);
            border-bottom: 1px solid rgba(24, 27, 21, 0.28);
            padding-bottom: 2px;
            transition: border-color 0.25s ease-out;
        }

        .related-zone .related-link:hover {
            border-bottom-color: var(--accent-deep);
        }

        .cta-dark {
            background: var(--bg-dark);
            padding: 88px 0;
            color: #fff;
        }

        .cta-dark .container {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 40px;
        }

        .cta-copy h2 {
            color: #fff;
            font-size: 42px;
            line-height: 1.25;
            margin: 0 0 16px;
            max-width: 18ch;
            font-weight: 800;
            letter-spacing: -0.015em;
        }

        .cta-copy p {
            color: rgba(255, 255, 255, 0.64);
            margin: 0;
            max-width: 48ch;
            line-height: 1.75;
        }

        .footer {
            background: var(--bg-dark);
            color: #fff;
            padding: 56px 0 26px;
            border-top: 1px solid var(--line-light);
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.7fr 1fr;
            gap: 48px;
            padding-bottom: 38px;
        }

        .footer .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            line-height: 1.8;
            max-width: 36ch;
            margin: 14px 0 0;
        }

        .footer-title {
            color: rgba(255, 255, 255, 0.95);
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 9px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            line-height: 1.7;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s ease-out;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--line-light);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.38);
            font-size: 12px;
        }

        @media (max-width: 1023px) {
            .site-sidebar {
                display: none;
            }

            .content-main {
                margin-left: 0;
                padding-top: 64px;
            }

            .mobile-topbar {
                display: flex;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 64px;
                z-index: 100;
                background: var(--bg-dark);
                color: #fff;
                align-items: center;
                justify-content: space-between;
                padding: 0 20px;
            }

            .mobile-brand {
                font-size: 20px;
                font-weight: 800;
                color: #fff;
                letter-spacing: -0.01em;
            }

            .nav-toggle {
                width: 44px;
                height: 44px;
                display: inline-flex;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 5px;
                background: transparent;
                border: 0;
                padding: 0;
                cursor: pointer;
            }

            .nav-toggle span {
                display: block;
                width: 22px;
                height: 2px;
                background: #fff;
            }

            .drawer-overlay {
                display: block;
                position: fixed;
                inset: 0;
                z-index: 110;
                background: #000;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s ease-out, visibility 0.3s ease-out;
            }

            .mobile-drawer {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 0;
                left: 0;
                bottom: 0;
                z-index: 120;
                width: min(86vw, 320px);
                background: var(--bg-dark);
                padding: 34px 22px;
                transform: translateX(-105%);
                transition: transform 0.3s ease-out;
                color: #fff;
                overflow-y: auto;
            }

            .mobile-drawer .brand-wrap {
                margin-bottom: 30px;
            }

            .close-drawer {
                margin-top: 30px;
                background: transparent;
                border: 1px solid rgba(255, 255, 255, 0.22);
                border-radius: var(--radius);
                color: rgba(255, 255, 255, 0.72);
                font-size: 15px;
                min-height: 44px;
                padding: 0 16px;
                cursor: pointer;
                transition: border-color 0.2s ease-out, color 0.2s ease-out;
            }

            .close-drawer:hover {
                border-color: var(--accent);
                color: var(--accent);
            }

            body.drawer-open .mobile-drawer {
                transform: translateX(0);
            }

            body.drawer-open .drawer-overlay {
                opacity: 0.6;
                visibility: visible;
            }

            .mobile-drawer .project-nav .nav-link {
                min-height: 50px;
                border-radius: 4px;
            }

            .mobile-drawer .nav-link.active {
                background: transparent;
                box-shadow: none;
                padding-left: 20px;
                position: relative;
            }

            .mobile-drawer .nav-link.active::before {
                content: "";
                position: absolute;
                left: 4px;
                top: 50%;
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--accent);
                transform: translateY(-50%);
            }
        }

        @media (max-width: 900px) {
            .category-hero {
                padding: 80px 0 60px;
            }

            .category-hero h1 {
                font-size: 58px;
            }

            .page-section,
            .faq-section,
            .dark-scenarios {
                padding: 72px 0;
            }

            .principle-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .faq-layout {
                grid-template-columns: 1fr;
                gap: 34px;
            }
        }

        @media (max-width: 700px) {
            .container {
                padding: 0 20px;
            }

            .category-hero {
                padding: 62px 0 52px;
            }

            .category-hero h1 {
                font-size: 44px;
                margin-bottom: 20px;
            }

            .category-hero .lead {
                font-size: 17px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn {
                width: 100%;
            }

            .module-row {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .module-row .index {
                margin-bottom: 4px;
            }

            .module-row a {
                margin-top: 12px;
            }

            .section-intro h2 {
                font-size: 32px;
            }

            .pair-grid>.cell,
            .pair-grid {
                margin: 0;
                padding: 0;
            }

            .pair-grid {
                display: block;
            }

            .pair-grid+.pair-grid {
                margin-top: 56px;
            }

            .pair-grid .cell+.cell {
                margin-top: 24px;
            }

            .pair-copy {
                padding-top: 0;
            }

            .pair-copy h3 {
                font-size: 24px;
            }

            .accent-banner {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding: 28px 24px;
            }

            .accent-banner p {
                font-size: 16px;
                line-height: 1.7;
            }

            .accent-banner a {
                white-space: normal;
            }

            .scenario-row {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 28px 0;
            }

            .scenario-index {
                font-size: 20px;
            }

            .principle-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-dark {
                padding: 64px 0;
            }

            .cta-dark .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 26px;
            }

            .cta-copy h2 {
                font-size: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }

            .footer-inner {
                padding: 0 20px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 16px;
            }

            .page-section,
            .faq-section,
            .dark-scenarios {
                padding: 56px 0;
            }

            .section-intro h2 {
                font-size: 30px;
            }

            .category-hero h1 {
                font-size: 40px;
            }

            .hero-actions {
                margin-top: 28px;
            }

            .accent-banner,
            .principle-card {
                padding-left: 20px;
                padding-right: 20px;
            }

            details.faq-item summary {
                padding: 18px 24px 18px 0;
                font-size: 16px;
            }

            .faq-item summary::after {
                font-size: 20px;
            }

            .faq-title h2 {
                font-size: 32px;
            }

            .cta-copy h2 {
                font-size: 28px;
                max-width: 15ch;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0s !important;
                transition-duration: 0s !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category2 */
/* ========== Design Tokens ========== */
        :root {
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --c-bg: #F5F3ED;
            --c-dark: #0B0E0A;
            --c-card: #FFFFFF;
            --c-panel: #ECEAE2;
            --c-ink: #181B15;
            --c-soft: #4C5045;
            --c-muted: #71766B;
            --c-lime: #D7F32D;
            --c-lime-dark: #B9D41C;
            --c-gold: #E0A92E;
            --line: rgba(24, 27, 21, 0.14);
            --line-light: rgba(255, 255, 255, 0.18);
            --radius-card: 6px;
            --radius-btn: 10px;
            --shadow-1: 0 1px 2px rgba(11, 14, 10, 0.05);
            --shadow-2: 0 8px 30px rgba(11, 14, 10, 0.10);
            --max-width: 1240px;
            --pad-d: 48px;
            --pad-t: 28px;
            --pad-m: 20px;
            --font-body: var(--font-stack);
        }

        /* ========== Reset / Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-body);
            line-height: 1.7;
            background: var(--c-bg);
            color: var(--c-ink);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        body.drawer-open {
            overflow: hidden;
        }

        img,
        svg,
        video {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--c-ink);
            text-decoration: none;
            transition: color 0.25s ease-out, border-color 0.25s ease-out;
        }

        a:hover {
            color: var(--c-dark);
        }

        button,
        input,
        textarea,
        summary {
            font-family: inherit;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--c-dark);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .dark-section a:focus-visible,
        .dark-section button:focus-visible {
            outline-color: var(--c-lime);
        }

        h1,
        h2,
        h3,
        h4,
        p,
        ul,
        ol,
        figure {
            margin: 0;
        }

        /* ========== App Shell Layout ========== */
        .app-shell {
            min-height: 100vh;
        }

        .main-wrap {
            margin-left: 276px;
            width: calc(100% - 276px);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            background: var(--c-bg);
        }

        .main-content {
            flex: 1;
        }

        /* ========== Sidebar ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 276px;
            background: var(--c-dark);
            display: flex;
            flex-direction: column;
            padding: 0 0 20px;
            z-index: 500;
            color: #fff;
        }

        .brand-wrap {
            height: 90px;
            display: flex;
            align-items: center;
            padding: 0 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
        }

        .brand-link {
            display: block;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            letter-spacing: -0.01em;
        }

        .logo-sub {
            font-size: 10px;
            letter-spacing: 0.22em;
            color: rgba(255, 255, 255, 0.45);
            margin-top: 4px;
            font-weight: 500;
        }

        .sidebar-nav-area {
            flex: 1;
            padding: 30px 0;
        }

        .project-nav {
            display: flex;
            flex-direction: column;
            gap: 2px;
            padding: 0 16px;
        }

        .nav-link {
            position: relative;
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 16px;
            font-size: 15px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.65);
            border-radius: 6px;
            border: 1px solid transparent;
            line-height: 1.3;
            transition: background 0.25s ease-out, color 0.25s ease-out;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-link.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 3px;
            border-radius: 2px;
            background: var(--c-lime);
        }

        .side-status {
            padding: 18px 28px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--c-lime);
            display: inline-block;
            margin-right: 7px;
            vertical-align: 1px;
        }

        /* ========== Mobile Topbar ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--c-dark);
            z-index: 1002;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.18);
        }

        .mobile-topbar .logo-text {
            font-size: 18px;
        }

        .menu-toggle {
            background: transparent;
            border: 0;
            width: 44px;
            height: 44px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            padding: 0;
            border-radius: 8px;
        }

        .menu-toggle span {
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform 0.25s ease-out, opacity 0.25s ease-out;
        }

        body.drawer-open .menu-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        body.drawer-open .menu-toggle span:nth-child(2) {
            opacity: 0;
        }

        body.drawer-open .menu-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Mobile Drawer ========== */
        .drawer-brand {
            height: 64px;
            display: flex;
            align-items: center;
            padding: 0 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            margin-bottom: 20px;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: min(86vw, 320px);
            background: var(--c-dark);
            display: flex;
            flex-direction: column;
            padding: 0 18px 24px;
            z-index: 1003;
            transform: translateX(-100%);
            transition: transform 0.28s ease-out;
            overflow-y: auto;
        }

        .mobile-drawer .project-nav {
            padding: 0;
            flex: 1;
        }

        .mobile-drawer .nav-link {
            min-height: 52px;
            padding-left: 18px;
        }

        .mobile-drawer .nav-link.active::before {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            left: 0;
            right: auto;
            top: 20px;
            bottom: auto;
            background: var(--c-lime);
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            z-index: 1000;
            background: rgba(8, 10, 8, 0.6);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.28s ease-out, visibility 0.28s ease-out;
        }

        body.drawer-open .drawer-overlay {
            opacity: 1;
            visibility: visible;
        }

        body.drawer-open .mobile-drawer {
            transform: translateX(0);
        }

        /* ========== Layout Helpers / Sections ========== */
        .page-intro {
            background: linear-gradient(180deg, rgba(11, 14, 10, 0.88), rgba(11, 14, 10, 0.74)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            padding: 80px 0 72px;
        }

        .breadcrumb-line {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 28px;
        }

        .breadcrumb-line a {
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.25s ease-out;
        }

        .breadcrumb-line a:hover {
            color: var(--c-lime);
        }

        .page-intro .eyebrow {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.12em;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 16px;
        }

        .page-intro h1 {
            font-size: 72px;
            font-weight: 800;
            line-height: 1.08;
            letter-spacing: -0.03em;
            color: #fff;
            margin-bottom: 20px;
        }

        .intro-lead {
            font-size: 18px;
            line-height: 1.8;
            max-width: 68ch;
            color: rgba(255, 255, 255, 0.82);
        }

        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
        }

        .intro-tags span {
            display: inline-flex;
            align-items: center;
            min-height: 32px;
            padding: 0 14px;
            border: 1px solid rgba(255, 255, 255, 0.28);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.86);
        }

        /* Section spacing */
        .page-section {
            padding: 96px 0;
        }

        .section-white {
            background: #FDFCF9;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .dark-section {
            background: var(--c-dark);
            color: #fff;
        }

        .grid-container {
            max-width: var(--max-width);
            padding-left: var(--pad-d);
            padding-right: var(--pad-d);
        }

        .grid-container.fluid {
            max-width: 100%;
            padding-left: 0;
            padding-right: 0;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head.left-head {
            margin-bottom: 0;
        }

        .section-tag {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: var(--c-muted);
        }

        .dark-section .section-tag {
            color: var(--c-lime);
        }

        .section-head h2 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-top: 14px;
            margin-bottom: 18px;
            color: var(--c-ink);
        }

        .dark-section .section-head h2 {
            color: #fff;
        }

        .section-head .lead {
            font-size: 17px;
            line-height: 1.8;
            max-width: 68ch;
            color: var(--c-soft);
        }

        .dark-section .section-head .lead {
            color: rgba(255, 255, 255, 0.72);
        }

        /* Anchor strip */
        .anchor-strip {
            background: #fff;
            border-bottom: 1px solid var(--line);
        }

        .anchor-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            padding: 10px 0;
        }

        .anchor-nav a {
            display: inline-flex;
            align-items: center;
            min-height: 44px;
            padding: 0 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-muted);
            border: 1px solid transparent;
            transition: color 0.25s ease-out, background 0.25s ease-out, border-color 0.25s ease-out;
        }

        .anchor-nav a:hover {
            color: var(--c-dark);
            background: var(--c-panel);
            border-color: var(--line);
        }

        /* ========== Workflow ========== */
        .workflow-wrap {
            border: 1px solid var(--line);
            background: #fff;
            border-radius: var(--radius-card);
            padding: 12px 36px 8px;
            box-shadow: var(--shadow-1);
        }

        .workflow-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .workflow-item {
            display: grid;
            grid-template-columns: 72px 1fr;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid var(--line);
            position: relative;
        }

        .workflow-item:last-child {
            border-bottom: 0;
        }

        .workflow-num {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--c-lime-dark);
            letter-spacing: -0.02em;
        }

        .workflow-item h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--c-ink);
        }

        .workflow-item p {
            max-width: 58ch;
            line-height: 1.8;
            color: var(--c-soft);
            font-size: 16px;
        }

        /* ========== Feature Cards ========== */
        .feature-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: border-color 0.25s ease-out, box-shadow 0.25s ease-out, transform 0.25s ease-out;
        }

        .feature-card:hover {
            transform: translateY(-2px);
            border-color: rgba(24, 27, 21, 0.28);
            box-shadow: var(--shadow-2);
        }

        .feature-media {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--c-panel);
        }

        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }

        .feature-body {
            padding: 30px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .feature-type {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--c-muted);
            margin-bottom: 14px;
        }

        .feature-body h3 {
            font-size: 24px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--c-ink);
        }

        .feature-body p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-soft);
            margin-bottom: 24px;
            max-width: 52ch;
        }

        .feature-link {
            margin-top: auto;
            align-self: flex-start;
            font-size: 15px;
            font-weight: 700;
            color: var(--c-dark);
            border-bottom: 1px solid var(--c-dark);
            line-height: 1.6;
            transition: border-color 0.25s ease-out, color 0.25s ease-out;
        }

        .feature-link:hover {
            color: var(--c-lime-dark);
            border-color: var(--c-lime-dark);
        }

        /* Wide info */
        .wide-info {
            background: var(--c-panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 40px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .wide-label {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.12em;
            color: var(--c-muted);
            margin-bottom: 18px;
        }

        .wide-info h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            color: var(--c-ink);
        }

        .wide-info p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-soft);
            max-width: 78ch;
            margin-bottom: 20px;
        }

        .wide-info ul {
            margin: 0 0 24px 0;
            padding: 0;
            list-style: none;
        }

        .wide-info li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 8px;
            color: var(--c-soft);
            line-height: 1.7;
        }

        .wide-info li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0.78em;
            width: 8px;
            height: 2px;
            background: var(--c-lime-dark);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 700;
            border-bottom: 1px solid var(--c-dark);
            line-height: 1.6;
            color: var(--c-dark);
            transition: color 0.25s ease-out, border-color 0.25s ease-out;
        }

        .text-link:hover {
            color: var(--c-lime-dark);
            border-color: var(--c-lime-dark);
        }

        /* ========== Guarantee / Boundary dark section ========== */
        .guarantee-grid {
            margin-top: 16px;
        }

        .guarantee-title {
            margin-bottom: 14px;
        }

        .guarantee-title h3 {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }

        .guarantee-block {
            height: 100%;
            padding: 30px 26px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.02);
        }

        .guarantee-num {
            font-size: 34px;
            font-weight: 800;
            line-height: 1;
            color: rgba(255, 255, 255, 0.22);
            margin-bottom: 26px;
            letter-spacing: -0.03em;
        }

        .guarantee-block p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.72);
        }

        /* ========== Audience split ========== */
        .audience-figure {
            margin: 0;
        }

        .figure-frame {
            aspect-ratio: 5 / 4;
            overflow: hidden;
            border-radius: var(--radius-card);
            border: 1px solid var(--line);
            background: #fff;
            box-shadow: var(--shadow-1);
        }

        .figure-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }

        .figure-caption {
            margin-top: 14px;
            font-size: 13px;
            color: var(--c-muted);
            line-height: 1.6;
        }

        .scope-list-row {
            list-style: none;
            margin: 0;
            padding: 0;
            border-top: 1px solid var(--line);
        }

        .scope-item {
            display: grid;
            grid-template-columns: 150px 1fr;
            gap: 28px;
            padding: 28px 0;
            border-bottom: 1px solid var(--line);
        }

        .scope-cat {
            font-size: 15px;
            font-weight: 800;
            color: var(--c-ink);
            padding-top: 2px;
        }

        .scope-info h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--c-ink);
        }

        .scope-info p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-soft);
            max-width: 62ch;
        }

        .scope-info .scope-path {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 8px;
            font-size: 14px;
            font-weight: 700;
            color: var(--c-lime-dark);
            border-bottom: 1px solid transparent;
            line-height: 1.6;
        }

        .scope-info .scope-path:hover {
            border-color: var(--c-lime-dark);
        }

        /* ========== FAQ ========== */
        .faq-side .section-head {
            margin-bottom: 28px;
        }

        .faq-side .side-note {
            font-size: 15px;
            line-height: 1.8;
            color: var(--c-muted);
            max-width: 36ch;
        }

        .faq-list {
            border-top: 1px solid var(--line);
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            cursor: pointer;
            padding: 24px 8px 24px 0;
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--c-dark);
            transition: padding-left 0.2s ease-out;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            padding-left: 6px;
        }

        .faq-icon {
            position: relative;
            flex: 0 0 24px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid rgba(24, 27, 21, 0.24);
            transition: border-color 0.2s ease-out, background 0.2s ease-out;
        }

        .faq-item summary:hover .faq-icon {
            border-color: var(--c-lime-dark);
            background: rgba(217, 243, 45, 0.18);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 10px;
            height: 2px;
            background: var(--c-dark);
            transform: translate(-50%, -50%);
            border-radius: 2px;
        }

        .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
        }

        .faq-item[open] .faq-icon::after {
            opacity: 0;
        }

        .faq-answer {
            padding: 0 28px 28px 0;
            color: var(--c-soft);
            font-size: 16px;
            line-height: 1.8;
            max-width: 72ch;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 88px 0;
        }

        .cta-inner {
            text-align: center;
        }

        .cta-inner .eyebrow {
            font-size: 13px;
            letter-spacing: 0.14em;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 16px;
        }

        .cta-inner h2 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #fff;
            max-width: 24ch;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-inner p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.72);
            max-width: 62ch;
            margin: 20px auto 0;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-top: 34px;
        }

        .cta-text-link {
            display: inline-flex;
            margin-top: 18px;
            font-size: 15px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.7);
            border-bottom: 1px solid rgba(255, 255, 255, 0.35);
            padding-bottom: 2px;
            transition: color 0.25s ease-out, border-color 0.25s ease-out;
        }

        .cta-text-link:hover {
            color: var(--c-lime);
            border-color: var(--c-lime);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            line-height: 1.2;
            border: 1px solid transparent;
            cursor: pointer;
            text-decoration: none;
            transition: background 0.25s ease-out, color 0.25s ease-out, border-color 0.25s ease-out, transform 0.25s ease-out;
        }

        .btn-primary {
            background: var(--c-lime);
            color: var(--c-dark);
            border-color: var(--c-lime);
        }

        .btn-primary:hover {
            background: var(--c-lime-dark);
            border-color: var(--c-lime-dark);
            color: var(--c-dark);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--c-lime);
            color: var(--c-lime);
            transform: translateY(-2px);
        }

        /* ========== Back links ========== */
        .back-links {
            border-top: 1px solid var(--line);
            background: var(--c-bg);
        }

        .back-links .grid-container {
            padding-top: 18px;
            padding-bottom: 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            align-items: center;
        }

        .back-links .back-label {
            font-size: 13px;
            font-weight: 700;
            color: var(--c-muted);
            letter-spacing: 0.06em;
        }

        .back-links a {
            display: inline-flex;
            min-height: 36px;
            align-items: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--c-muted);
            transition: color 0.25s ease-out;
        }

        .back-links a:hover {
            color: var(--c-dark);
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--c-dark);
            color: rgba(255, 255, 255, 0.75);
        }

        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 64px var(--pad-d) 28px;
            width: 100%;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.8fr 1.1fr;
            gap: 48px;
        }

        .footer-brand .logo-text {
            margin-bottom: 14px;
        }

        .footer-desc {
            max-width: 38ch;
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.62);
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 9px;
            font-size: 15px;
            line-height: 1.7;
        }

        .footer-links a,
        .footer-links span {
            color: rgba(255, 255, 255, 0.62);
        }

        .footer-links a {
            transition: color 0.25s ease-out;
        }

        .footer-links a:hover {
            color: var(--c-lime);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.16);
            margin-top: 52px;
            padding-top: 20px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== Motion ========== */
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

        /* ========== Responsive ========== */
        @media screen and (max-width: 1023.98px) {
            .sidebar {
                display: none;
            }

            .main-wrap {
                margin-left: 0;
                width: 100%;
            }

            .main-content {
                padding-top: 64px;
            }

            .mobile-topbar {
                display: flex;
            }

            .page-intro {
                padding: 64px 0 56px;
            }

            .page-section {
                padding: 76px 0;
            }

            .grid-container {
                padding-left: var(--pad-t);
                padding-right: var(--pad-t);
            }

            .footer-inner {
                padding-left: var(--pad-t);
                padding-right: var(--pad-t);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media screen and (max-width: 767.98px) {
            .page-intro h1 {
                font-size: 46px;
            }

            .page-intro {
                padding: 48px 0 48px;
            }

            .page-section {
                padding: 64px 0;
            }

            .grid-container {
                padding-left: var(--pad-m);
                padding-right: var(--pad-m);
            }

            .footer-inner {
                padding-left: var(--pad-m);
                padding-right: var(--pad-m);
            }

            .section-head h2 {
                font-size: 32px;
            }

            .anchor-nav {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 4px;
                scrollbar-width: none;
            }

            .anchor-nav::-webkit-scrollbar {
                display: none;
            }

            .anchor-nav a {
                flex: 0 0 auto;
                min-height: 44px;
                padding: 0 14px;
            }

            .workflow-wrap {
                padding: 8px 24px;
            }

            .workflow-item {
                grid-template-columns: 56px 1fr;
                gap: 16px;
                padding: 24px 0;
            }

            .workflow-num {
                font-size: 22px;
            }

            .feature-body {
                padding: 24px;
            }

            .wide-info {
                padding: 28px 24px;
            }

            .scope-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 24px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .cta-inner h2 {
                font-size: 34px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 360px;
            }
        }

        @media screen and (max-width: 519.98px) {
            .page-intro h1 {
                font-size: 40px;
            }

            .intro-lead {
                font-size: 16px;
            }

            .section-tag {
                font-size: 12px;
            }

            .section-head .lead {
                font-size: 16px;
            }

            .guarantee-block {
                padding: 24px 20px;
            }
        }

/* roulang page: category3 */
:root {
            --paper: #F5F3ED;
            --dark: #0B0E0A;
            --panel: #FFFFFF;
            --sub: #ECEAE2;
            --text: #181B15;
            --muted: #71766B;
            --soft: #4C5045;
            --line: rgba(24, 27, 21, 0.14);
            --line-dark: rgba(255, 255, 255, 0.18);
            --accent: #D7F32D;
            --accent-dark: #B9D41C;
            --gold: #E0A92E;
            --radius: 6px;
            --radius-btn: 10px;
            --shadow: 0 1px 2px rgba(11, 14, 10, 0.05);
            --shadow-hover: 0 8px 30px rgba(11, 14, 10, 0.10);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--paper);
            color: var(--text);
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
        }

        body.menu-open {
            overflow: hidden;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        p,
        figure,
        blockquote,
        dl,
        dd,
        ul,
        ol {
            margin: 0;
        }

        ul,
        ol {
            padding: 0;
            list-style: none;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease-out;
        }

        img {
            display: block;
            max-width: 100%;
            height: auto;
        }

        button {
            font-family: var(--font);
            cursor: pointer;
            border: 0;
            background: none;
        }

        summary {
            cursor: pointer;
        }

        summary::-webkit-details-marker {
            display: none;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--text);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .site-shell {
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 276px;
            height: 100vh;
            z-index: 130;
            background: var(--dark);
            color: #fff;
            display: flex;
            flex-direction: column;
            padding: 28px 22px 24px;
            transform: translateX(-105%);
            transition: transform 0.28s ease-out;
            overflow-y: auto;
        }

        .sidebar-brand {
            min-height: 76px;
            padding: 0 12px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        .brand-logo {
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            display: block;
        }

        .brand-sub {
            margin-top: 6px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 10px;
            letter-spacing: 0.08em;
            line-height: 1.4;
        }

        .side-nav {
            margin-top: 44px;
            flex: 1 1 auto;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .side-nav .nav-link {
            position: relative;
            display: flex;
            align-items: center;
            min-height: 46px;
            padding: 0 16px;
            border-radius: 6px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            font-weight: 600;
        }

        .side-nav .nav-link:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.06);
        }

        .side-nav .nav-link.active {
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
        }

        @media (min-width: 1024px) {
            .sidebar {
                transform: none;
            }

            .side-nav .nav-link.active::before {
                content: "";
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                width: 3px;
                height: 20px;
                background: var(--accent);
                border-radius: 3px;
            }
        }

        .sidebar-bottom {
            margin-top: 40px;
            padding: 18px 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.14);
        }

        .status-row {
            display: flex;
            align-items: center;
            gap: 9px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 13px;
        }

        .status-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(215, 243, 45, 0.16);
        }

        .sidebar-copyright {
            display: block;
            margin-top: 12px;
            color: rgba(255, 255, 255, 0.42);
            font-size: 12px;
        }

        .mobile-topbar {
            display: none;
        }

        .menu-overlay {
            display: none;
        }

        @media (max-width: 1023.98px) {
            .mobile-topbar {
                display: flex;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 64px;
                z-index: 120;
                align-items: center;
                justify-content: space-between;
                background: var(--dark);
                padding: 0 20px;
            }

            .topbar-logo {
                display: block;
                color: #fff;
                font-size: 20px;
                font-weight: 800;
                line-height: 1.2;
                letter-spacing: -0.01em;
            }

            .menu-toggle {
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 6px;
                width: 44px;
                height: 44px;
            }

            .menu-toggle span {
                display: block;
                width: 24px;
                height: 2px;
                background: #fff;
                border-radius: 2px;
                transition: transform 0.22s ease-out, opacity 0.22s ease-out;
            }

            .menu-toggle.is-active span {
                transform-origin: center;
            }

            .menu-toggle.is-active span:nth-child(1) {
                transform: translateY(8px) rotate(45deg);
            }

            .menu-toggle.is-active span:nth-child(2) {
                opacity: 0;
            }

            .menu-toggle.is-active span:nth-child(3) {
                transform: translateY(-8px) rotate(-45deg);
            }

            .sidebar {
                width: min(86vw, 320px);
                box-shadow: 16px 0 40px rgba(0, 0, 0, 0.24);
            }

            .sidebar.is-open {
                transform: translateX(0);
            }

            .side-nav .nav-link.active::before {
                display: none;
            }

            .side-nav .nav-link.active::after {
                content: "";
                position: absolute;
                left: 8px;
                top: 50%;
                transform: translateY(-50%);
                width: 8px;
                height: 8px;
                background: var(--accent);
                border-radius: 50%;
            }

            .menu-overlay {
                display: block;
                position: fixed;
                inset: 0;
                z-index: 125;
                background: rgba(0, 0, 0, 0.6);
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.2s ease-out;
            }

            .menu-overlay.is-visible {
                opacity: 1;
                pointer-events: auto;
            }

            .main-wrap {
                margin-left: 0 !important;
                padding-top: 64px;
            }

            .page-container {
                padding-left: 28px;
                padding-right: 28px;
            }
        }

        @media (max-width: 639.98px) {
            .page-container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        .main-wrap {
            min-height: 100vh;
            margin-left: 276px;
            display: flex;
            flex-direction: column;
            background: var(--paper);
        }

        .main-content {
            flex: 1 1 auto;
        }

        .page-container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .section {
            padding: 96px 0;
        }

        @media (max-width: 1023.98px) {
            .section {
                padding: 64px 0;
            }
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            color: var(--text);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 0.1em;
        }

        .section-kicker::before {
            content: "";
            width: 8px;
            height: 8px;
            margin-right: 10px;
            background: var(--accent);
        }

        .section-title {
            margin-top: 18px;
            font-size: clamp(30px, 4vw, 44px);
            line-height: 1.15;
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .section-desc {
            margin-top: 14px;
            max-width: 58ch;
            color: var(--muted);
            font-size: 16px;
            line-height: 1.8;
        }

        .page-intro {
            position: relative;
            padding: 88px 0 72px;
            color: #fff;
            background-color: var(--dark);
            background-image:
                linear-gradient(rgba(11, 14, 10, 0.92), rgba(11, 14, 10, 0.85)),
                url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }

        .intro-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
        }

        .intro-eyebrow::before {
            content: "";
            width: 18px;
            height: 2px;
            background: var(--accent);
        }

        .page-intro h1 {
            margin-top: 22px;
            color: #fff;
            font-size: clamp(44px, 7vw, 78px);
            line-height: 1.08;
            font-weight: 800;
            letter-spacing: -0.03em;
        }

        .intro-lead {
            margin-top: 28px;
            max-width: 66ch;
            color: rgba(255, 255, 255, 0.82);
            font-size: 18px;
            line-height: 1.9;
        }

        .intro-chip-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
        }

        .intro-chip {
            padding: 8px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 999px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            font-weight: 600;
        }

        .anchor-strip {
            background: var(--panel);
            border-bottom: 1px solid var(--line);
        }

        .anchor-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px 28px;
            padding-top: 18px;
            padding-bottom: 18px;
            color: var(--muted);
            font-size: 15px;
            font-weight: 600;
        }

        .anchor-inner a {
            color: var(--muted);
            position: relative;
            padding: 6px 0;
        }

        .anchor-inner a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.2s ease-out;
        }

        .anchor-inner a:hover {
            color: var(--dark);
        }

        .anchor-inner a:hover::after {
            transform: scaleX(1);
        }

        .grid-x {
            row-gap: 32px;
        }

        .coverage-card {
            height: 100%;
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform 0.22s ease-out, box-shadow 0.22s ease-out, border-color 0.22s ease-out;
        }

        .coverage-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(24, 27, 21, 0.24);
        }

        .coverage-media {
            aspect-ratio: 4 / 3;
            background: var(--sub);
            overflow: hidden;
        }

        .coverage-media img,
        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .coverage-content {
            padding: 28px;
        }

        .coverage-num {
            font-size: 13px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.04em;
        }

        .coverage-content h3,
        .feature-body h3 {
            margin-top: 10px;
            font-size: 22px;
            line-height: 1.4;
            font-weight: 800;
        }

        .coverage-content p,
        .feature-body p {
            margin-top: 12px;
            color: var(--muted);
            line-height: 1.8;
        }

        .coverage-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-top: 22px;
            padding-bottom: 4px;
            border-bottom: 2px solid var(--accent);
            font-size: 15px;
            font-weight: 800;
        }

        .coverage-link:hover {
            color: var(--dark);
            border-color: var(--accent-dark);
        }

        .coverage-wide {
            margin-top: 32px;
            display: flex;
            align-items: stretch;
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .coverage-wide .feature-media {
            flex: 0 0 46%;
            min-height: 260px;
            background: var(--sub);
        }

        .feature-body {
            flex: 1;
            padding: 38px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        @media (max-width: 767.98px) {
            .coverage-wide {
                flex-direction: column;
            }

            .coverage-wide .feature-media {
                flex: none;
                width: 100%;
                aspect-ratio: 16 / 10;
                min-height: auto;
            }

            .feature-body {
                padding: 28px 24px;
            }
        }

        .schedule-section {
            position: relative;
            background-color: var(--dark);
            background-image:
                linear-gradient(rgba(11, 14, 10, 0.92), rgba(11, 14, 10, 0.94)),
                url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        .schedule-section .section-kicker,
        .schedule-section .section-title {
            color: #fff;
        }

        .schedule-section .section-desc {
            color: rgba(255, 255, 255, 0.68);
        }

        .match-list {
            margin-top: 44px;
            border-bottom: 1px solid var(--line-dark);
        }

        .match-row {
            display: flex;
            gap: 36px;
            align-items: flex-start;
            padding: 30px 0;
            border-top: 1px solid var(--line-dark);
        }

        .match-date {
            flex: 0 0 150px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.6;
            font-weight: 600;
        }

        .match-main {
            flex: 1;
            min-width: 0;
        }

        .match-title {
            color: #FFFFFF;
            font-size: 21px;
            font-weight: 800;
            line-height: 1.4;
        }

        .match-copy {
            margin-top: 8px;
            max-width: 62ch;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
        }

        .match-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            min-height: 28px;
            padding: 0 12px;
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.84);
        }

        .match-state {
            flex: 0 0 auto;
            margin-top: 4px;
            padding: 7px 13px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 999px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 12px;
            font-weight: 700;
            white-space: nowrap;
        }

        .schedule-tip {
            margin-top: 32px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            line-height: 1.7;
        }

        @media (max-width: 767.98px) {
            .match-row {
                flex-direction: column;
                gap: 12px;
                padding: 24px 0;
            }

            .match-date {
                flex: none;
            }

            .match-state {
                align-self: flex-start;
                margin-top: 0;
            }
        }

        .process-section {
            background: #FFFFFF;
        }

        .process-title-wrap {
            position: sticky;
            top: 32px;
        }

        .process-list {
            position: relative;
            margin-top: 16px;
        }

        .process-row {
            position: relative;
            display: grid;
            grid-template-columns: 54px 1fr;
            gap: 22px;
            padding-bottom: 34px;
        }

        .process-row:last-child {
            padding-bottom: 0;
        }

        .process-row::before {
            content: "";
            position: absolute;
            left: 26px;
            top: 54px;
            bottom: -18px;
            width: 1px;
            background: rgba(24, 27, 21, 0.16);
        }

        .process-row:last-child::before {
            display: none;
        }

        .process-step {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--paper);
            border: 1px solid var(--line);
            border-radius: 6px;
            color: var(--dark);
            font-size: 15px;
            font-weight: 800;
        }

        .process-row h3 {
            font-size: 20px;
            font-weight: 800;
            line-height: 1.4;
            padding-top: 4px;
        }

        .process-row p {
            margin-top: 8px;
            max-width: 62ch;
            color: var(--muted);
            line-height: 1.8;
        }

        @media (max-width: 1023.98px) {
            .process-title-wrap {
                position: static;
                margin-bottom: 36px;
            }
        }

        .cooperation-section {
            background: var(--paper);
        }

        .cooperation-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 44px;
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .cooperation-copy {
            flex: 1 1 auto;
            max-width: 640px;
        }

        .cooperation-copy h2 {
            margin-top: 16px;
            font-size: clamp(28px, 3.2vw, 38px);
            line-height: 1.2;
            font-weight: 800;
        }

        .cooperation-copy p {
            margin-top: 16px;
            max-width: 56ch;
            color: var(--muted);
            line-height: 1.8;
        }

        .cooperation-points {
            margin-top: 30px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .cooperation-point {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text);
            font-size: 15px;
            font-weight: 600;
        }

        .cooperation-point::before {
            content: "";
            flex: 0 0 auto;
            width: 8px;
            height: 8px;
            margin-top: 9px;
            background: var(--accent-dark);
        }

        .cooperation-media {
            flex: 0 0 34%;
            max-width: 420px;
        }

        .cooperation-media img {
            width: 100%;
            aspect-ratio: 1 / 1;
            object-fit: cover;
            border-radius: var(--radius);
        }

        .cooperation-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 34px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 800;
            line-height: 1;
            border: 1px solid transparent;
            transition: transform 0.22s ease-out, background 0.22s ease-out, border-color 0.22s ease-out, color 0.22s ease-out;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--dark);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(24, 27, 21, 0.6);
            color: var(--dark);
        }

        .btn-ghost:hover {
            border-color: var(--accent-dark);
            color: var(--accent-dark);
            transform: translateY(-2px);
        }

        @media (max-width: 1023.98px) {
            .cooperation-wrap {
                flex-direction: column;
                padding: 28px;
                align-items: flex-start;
            }

            .cooperation-media {
                width: 100%;
                max-width: 100%;
            }

            .cooperation-media img {
                aspect-ratio: 16 / 10;
            }
        }

        .faq-section {
            background: #FFFFFF;
        }

        .faq-intro {
            padding-right: 32px;
        }

        .faq-list {
            border-top: 1px solid var(--line);
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
            padding: 4px 0;
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 20px 0;
            list-style: none;
            font-size: 16px;
            font-weight: 700;
            line-height: 1.6;
            color: var(--text);
        }

        .faq-item summary::after {
            content: "+";
            flex: 0 0 30px;
            font-size: 26px;
            font-weight: 300;
            color: var(--muted);
            text-align: center;
            transition: transform 0.2s ease-out, color 0.2s ease-out;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--dark);
        }

        .faq-answer {
            padding: 4px 0 22px;
            max-width: 72ch;
            color: var(--soft);
            line-height: 1.8;
            font-size: 15px;
        }

        .faq-answer p + p {
            margin-top: 14px;
        }

        @media (max-width: 1023.98px) {
            .faq-intro {
                padding-right: 0;
                margin-bottom: 28px;
            }
        }

        .page-bottom-nav {
            padding: 32px 0 64px;
            background: var(--paper);
        }

        .related-links {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 18px;
        }

        .related-label {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--muted);
            font-size: 15px;
            font-weight: 700;
        }

        .related-label::before {
            content: "";
            width: 8px;
            height: 8px;
            background: var(--accent);
        }

        .related-hrefs {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 22px;
        }

        .related-hrefs a {
            color: var(--muted);
            font-weight: 600;
            border-bottom: 1px solid transparent;
        }

        .related-hrefs a:hover {
            color: var(--dark);
            border-bottom-color: var(--accent-dark);
        }

        .footer {
            background: var(--dark);
            color: #fff;
            padding: 64px 0 28px;
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 36px;
            border-bottom: 1px solid var(--line-dark);
        }

        .footer-brand .logo-text {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            line-height: 1.3;
        }

        .footer-desc {
            margin-top: 14px;
            max-width: 42ch;
            color: rgba(255, 255, 255, 0.58);
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-title {
            margin-bottom: 18px;
            color: #fff;
            font-size: 14px;
            font-weight: 700;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
            color: rgba(255, 255, 255, 0.68);
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px 24px;
            padding-top: 22px;
            color: rgba(255, 255, 255, 0.42);
            font-size: 13px;
        }

        @media (max-width: 1023.98px) {
            .footer-inner {
                padding: 0 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px 28px;
            }
        }

        @media (max-width: 639.98px) {
            .footer-inner {
                padding: 0 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category4 */
:root {
            --bg: #F5F3ED;
            --dark: #0B0E0A;
            --card: #FFFFFF;
            --panel: #ECEAE2;
            --ink: #181B15;
            --weak: #71766B;
            --soft: #4C5045;
            --line: rgba(24, 27, 21, 0.14);
            --line-light: rgba(255, 255, 255, 0.18);
            --primary: #D7F32D;
            --primary-dark: #B9D41C;
            --amber: #E0A92E;
            --radius: 6px;
            --radius-btn: 10px;
            --shadow: 0 1px 2px rgba(11, 14, 10, 0.05);
            --shadow-hover: 0 8px 30px rgba(11, 14, 10, 0.10);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font);
            background: var(--bg);
            color: var(--ink);
            font-size: 16px;
            line-height: 1.8;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input {
            font: inherit;
        }

        h1,
        h2,
        h3,
        h4,
        p {
            margin: 0;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--dark);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .dark *:focus-visible {
            outline-color: var(--primary);
        }

        /* ============ 左侧 Shell ============ */
        .main-content {
            min-height: 100vh;
            margin-left: 276px;
            background: var(--bg);
        }

        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: 276px;
            min-height: 100vh;
            background: var(--dark);
            display: flex;
            flex-direction: column;
            z-index: 90;
        }

        .brand-area {
            height: 90px;
            padding: 0 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .logo-main {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            line-height: 1.2;
            white-space: nowrap;
        }

        .logo-sub {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.46);
            letter-spacing: 0.12em;
            margin-top: 3px;
        }

        .project-nav {
            padding: 28px 12px;
            display: flex;
            flex-direction: column;
            gap: 2px;
            flex: 1;
        }

        .nav-link {
            display: block;
            padding: 11px 18px;
            color: rgba(255, 255, 255, 0.65);
            border-left: 3px solid transparent;
            border-radius: 4px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1.5;
            transition: color .25s ease, background .25s ease, border-color .25s ease;
        }

        .nav-link:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.045);
        }

        .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
            border-left-color: var(--primary);
        }

        .sidebar-foot {
            padding: 20px 28px 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .status-line {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 12px;
            margin-bottom: 10px;
        }

        .status-dot {
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            flex: none;
        }

        .sidebar-copy {
            color: rgba(255, 255, 255, 0.35);
            font-size: 12px;
        }

        /* ============ 移动顶栏与抽屉 ============ */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            height: 64px;
            background: var(--dark);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 100;
        }

        .mobile-brand {
            color: #FFFFFF;
            font-size: 17px;
            font-weight: 800;
            letter-spacing: -0.01em;
        }

        .menu-toggle {
            width: 44px;
            height: 44px;
            background: transparent;
            border: 0;
            padding: 12px 9px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            border-radius: 6px;
        }

        .menu-toggle span {
            display: block;
            height: 2px;
            background: #FFFFFF;
            border-radius: 2px;
        }

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: min(86vw, 320px);
            background: var(--dark);
            display: flex;
            flex-direction: column;
            padding-top: 0;
            transform: translateX(-105%);
            transition: transform .3s ease-out;
            z-index: 110;
        }

        .drawer.is-open {
            transform: none;
        }

        .drawer .project-nav {
            padding: 24px 16px;
        }

        .drawer .brand-area {
            padding: 0 24px;
        }

        .drawer .sidebar-foot {
            padding: 16px 24px 28px;
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s ease, visibility .3s ease;
            z-index: 105;
        }

        .drawer-overlay.is-visible {
            opacity: 1;
            visibility: visible;
        }

        /* ============ 页面通用 ============ */
        .section {
            padding: 96px 0;
        }

        .shell {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 48px;
        }

        .kicker {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--weak);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .kicker::before {
            content: "";
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--primary-dark);
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--ink);
        }

        .section-head p {
            margin-top: 16px;
            color: var(--weak);
            font-size: 17px;
            max-width: 65ch;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 48px;
            padding: 0 26px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: transform .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--dark);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(24, 27, 21, 0.28);
            color: var(--ink);
        }

        .btn-ghost:hover {
            border-color: var(--primary-dark);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-ghost-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.3);
            color: #FFFFFF;
        }

        .btn-ghost-light:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ============ 分类页 Intro ============ */
        .cat-hero {
            background: var(--dark);
            color: #FFFFFF;
            padding: 88px 0 72px;
            position: relative;
        }

        .cat-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.1;
            pointer-events: none;
        }

        .cat-hero .shell {
            position: relative;
            z-index: 1;
        }

        .cat-eyebrow {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: rgba(255, 255, 255, 0.62);
            margin-bottom: 22px;
            display: inline-flex;
            gap: 8px;
            padding: 0 0 4px;
            border-bottom: 2px solid var(--primary);
        }

        .cat-hero h1 {
            font-size: clamp(40px, 5.4vw, 64px);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 22px;
        }

        .cat-hero .lead {
            max-width: 820px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 18px;
            line-height: 1.9;
        }

        .cat-hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
        }

        .cat-hero-tags span {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 999px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
            letter-spacing: 0.04em;
        }

        /* 锚点 */
        .cat-anchor-wrap {
            background: #FFFFFF;
            border-bottom: 1px solid var(--line);
        }

        .cat-anchor {
            max-width: 1240px;
            margin: 0 auto;
            padding: 18px 48px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
        }

        .anchor-chip {
            font-size: 14px;
            font-weight: 700;
            color: var(--soft);
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: color .2s ease, border-color .2s ease;
        }

        .anchor-chip:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary);
        }

        /* 折叠合规区 */
        .section-details {
            background: var(--bg);
        }

        .detail-list {
            max-width: 960px;
        }

        .detail-group {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: box-shadow .3s ease, transform .3s ease;
        }

        .detail-group + .detail-group {
            margin-top: 14px;
        }

        .detail-group[open] {
            box-shadow: var(--shadow-hover);
        }

        .detail-group summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 26px 28px;
            font-size: 18px;
            font-weight: 800;
            color: var(--ink);
            transition: background .25s ease;
        }

        .detail-group summary::-webkit-details-marker {
            display: none;
        }

        .detail-group summary:hover {
            background: rgba(215, 243, 45, 0.06);
        }

        .detail-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border: 1px solid var(--line);
            border-radius: 50%;
            font-size: 13px;
            font-weight: 800;
            color: var(--ink);
            flex: none;
            transition: background .25s ease;
        }

        .detail-group[open] .detail-num {
            background: var(--dark);
            color: var(--primary);
            border-color: var(--dark);
        }

        .detail-group summary::after {
            content: "+";
            margin-left: auto;
            font-size: 26px;
            font-weight: 300;
            color: var(--weak);
            transition: transform .25s ease, color .25s ease;
            line-height: 1;
        }

        .detail-group[open] summary::after {
            content: "−";
            color: var(--ink);
        }

        .detail-answer {
            padding: 2px 28px 30px 80px;
            color: var(--soft);
            line-height: 1.9;
            max-width: 80ch;
        }

        /* 管理边界区 */
        .section-boundary {
            background: #FFFFFF;
            border-top: 1px solid var(--line);
        }

        .boundary-content h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 18px;
            max-width: 20ch;
        }

        .boundary-content > p {
            color: var(--weak);
            font-size: 17px;
            max-width: 60ch;
            margin-bottom: 32px;
        }

        .boundary-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .boundary-list li {
            display: flex;
            gap: 18px;
            padding: 18px 0;
            border-bottom: 1px solid var(--line);
        }

        .boundary-list li:last-child {
            border-bottom: 0;
        }

        .boundary-list li > i {
            font-size: 12px;
            font-weight: 800;
            color: var(--primary-dark);
            font-style: normal;
            letter-spacing: 0.08em;
            width: 28px;
            line-height: 1.8;
            flex: none;
        }

        .boundary-list strong {
            display: block;
            font-size: 16px;
            font-weight: 800;
            color: var(--ink);
        }

        .boundary-list span {
            display: block;
            margin-top: 4px;
            color: var(--weak);
            font-size: 15px;
            line-height: 1.75;
        }

        .boundary-photo {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--panel);
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow);
        }

        .boundary-photo img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 关联 CTA */
        .section-cat-cta {
            background: var(--dark);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .section-cat-cta::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-panel {
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 20px;
        }

        .cta-panel .kicker {
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 0;
        }

        .cta-panel .kicker::before {
            background: var(--primary);
        }

        .cta-panel h2 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.24;
            margin: 6px 0 10px;
            max-width: 20ch;
        }

        .cta-panel p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 17px;
            max-width: 60ch;
        }

        .cta-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 14px;
        }

        .return-nav {
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.14);
            margin-top: 52px;
            width: 100%;
        }

        .return-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            font-weight: 700;
            transition: color .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .return-nav a:hover {
            color: var(--primary);
        }

        /* ============ Footer ============ */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 64px 48px 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 48px;
        }

        .footer .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            line-height: 1.8;
            max-width: 38ch;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.62);
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-links span {
            color: rgba(255, 255, 255, 0.42);
            font-size: 13px;
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.35);
            font-size: 13px;
        }

        /* ============ 响应式 ============ */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }

        @media (max-width: 1023.98px) {
            .sidebar {
                display: none;
            }

            .main-content {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }

            .section {
                padding: 64px 0;
            }

            .shell {
                padding: 0 28px;
            }

            .cat-anchor {
                padding: 16px 28px;
            }

            .cat-hero {
                padding: 64px 0 56px;
            }

            .cat-hero h1 {
                font-size: 40px;
            }

            .footer-inner {
                padding: 48px 28px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 639.98px) {
            .shell {
                padding: 0 20px;
            }

            .cat-hero .lead {
                font-size: 16px;
            }

            .cat-hero-tags {
                gap: 8px;
            }

            .cat-hero-tags span {
                font-size: 12px;
                padding: 5px 12px;
            }

            .cat-anchor {
                padding: 14px 20px;
                gap: 6px 12px;
                display:flex;
                overflow-x:auto;
                flex-wrap: nowrap;
            }

            .anchor-chip {
                font-size: 13px;
                white-space: nowrap;
            }

            .detail-group summary {
                padding: 20px;
                font-size: 16px;
                gap: 12px;
                flex-wrap: wrap;
            }

            .detail-num {
                width: 34px;
                height: 34px;
            }

            .detail-answer {
                padding: 0 20px 24px 68px;
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 30px;
            }

            .boundary-content h2 {
                font-size: 28px;
            }

            .cta-btns {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
            }

            .cta-btns .btn {
                width: 100%;
            }

            .footer-inner {
                padding: 40px 20px 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                margin-top: 32px;
            }
        }

        @media (max-width: 420px) {
            .detail-answer {
                padding-left: 20px;
            }
        }