/* roulang page: index */
:root {
            --blue-950: #092c4c;
            --blue-900: #0f4c81;
            --blue-800: #1769aa;
            --blue-700: #2784c6;
            --blue-100: #e8f3fb;
            --cyan: #25a7b9;
            --ink: #172b3a;
            --muted: #6c7e8d;
            --muted-2: #8b9aa6;
            --paper: #ffffff;
            --surface: #f5f8fb;
            --line: #dfe8ef;
            --line-dark: #c9d8e4;
            --success: #16856e;
            --warning: #c98523;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 8px 22px rgba(22, 64, 96, .07);
            --shadow-md: 0 18px 45px rgba(15, 76, 129, .12);
            --container: 1180px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--surface);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }

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

        button, input {
            font: inherit;
        }

        button { cursor: pointer; }

        .container {
            width: min(var(--container), calc(100% - 48px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 30;
            background: rgba(255,255,255,.95);
            border-bottom: 1px solid rgba(223,232,239,.9);
            backdrop-filter: blur(16px);
        }

        .nav-wrap {
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            color: var(--blue-950);
            font-weight: 800;
            letter-spacing: 0;
        }

        .brand-mark {
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            border-radius: 12px;
            color: #fff;
            background: var(--blue-900);
            box-shadow: 0 8px 18px rgba(15,76,129,.22);
            font-size: 18px;
        }

        .brand-name {
            font-size: 17px;
            line-height: 1.2;
        }

        .brand-name small {
            display: block;
            margin-top: 3px;
            color: var(--muted);
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 4px;
        }

        .main-nav a {
            position: relative;
            padding: 9px 13px;
            color: var(--muted);
            border-radius: 9px;
            font-size: 14px;
            font-weight: 700;
            white-space: nowrap;
        }

        .main-nav a:hover,
        .main-nav a:focus-visible,
        .main-nav a.active {
            color: var(--blue-900);
            background: var(--blue-100);
        }

        .menu-toggle {
            display: none;
            border: 1px solid var(--line);
            background: var(--paper);
            color: var(--blue-900);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 20px;
        }

        .hero {
            position: relative;
            overflow: hidden;
            padding: 82px 0 74px;
            background:
                linear-gradient(100deg, rgba(9,44,76,.97) 0%, rgba(15,76,129,.91) 54%, rgba(30,117,157,.82) 100%),
                url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1800&q=85") center/cover;
            color: #fff;
        }

        .hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0;
            height: 1px;
            background: rgba(255,255,255,.22);
        }

        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.08fr .92fr;
            align-items: center;
            gap: 62px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            color: #bfeaf0;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .eyebrow::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--cyan);
        }

        h1, h2, h3, p { margin-top: 0; }

        h1 {
            max-width: 730px;
            margin-bottom: 20px;
            font-size: clamp(36px, 5vw, 64px);
            line-height: 1.14;
            letter-spacing: 0;
        }

        h1 em {
            color: #84e2df;
            font-style: normal;
        }

        .hero-lead {
            max-width: 690px;
            margin-bottom: 28px;
            color: rgba(255,255,255,.84);
            font-size: 17px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 800;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
        }

        .button:hover { transform: translateY(-2px); }

        .button:focus-visible,
        input:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(37,167,185,.35);
            outline-offset: 3px;
        }

        .button-primary {
            color: var(--blue-950);
            background: #8ce2df;
            box-shadow: 0 10px 22px rgba(0,0,0,.12);
        }

        .button-primary:hover { background: #b1efeb; }

        .button-light {
            color: #fff;
            border-color: rgba(255,255,255,.42);
            background: rgba(255,255,255,.08);
        }

        .button-light:hover { background: rgba(255,255,255,.17); }

        .button-outline {
            color: var(--blue-900);
            border-color: var(--line-dark);
            background: #fff;
        }

        .button-outline:hover {
            border-color: var(--blue-700);
            background: var(--blue-100);
        }

        .hero-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            padding: 18px;
            border: 1px solid rgba(255,255,255,.2);
            border-radius: var(--radius-lg);
            background: rgba(7,35,60,.36);
            box-shadow: 0 22px 50px rgba(0,0,0,.16);
        }

        .compare-card {
            min-height: 210px;
            padding: 20px;
            border-radius: 15px;
            background: rgba(255,255,255,.1);
            border: 1px solid rgba(255,255,255,.16);
        }

        .compare-card.after { background: rgba(140,226,223,.14); }

        .compare-label {
            display: inline-block;
            margin-bottom: 38px;
            color: #bfeaf0;
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .08em;
        }

        .compare-card strong {
            display: block;
            margin-bottom: 7px;
            font-size: 22px;
            line-height: 1.25;
        }

        .compare-card p {
            margin-bottom: 0;
            color: rgba(255,255,255,.72);
            font-size: 13px;
            line-height: 1.65;
        }

        .hero-note {
            grid-column: 1 / -1;
            padding: 5px 4px 0;
            color: rgba(255,255,255,.7);
            font-size: 12px;
        }

        main { overflow: hidden; }

        .section {
            padding: 82px 0;
            background: var(--surface);
        }

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

        .section-dark {
            color: #fff;
            background: var(--blue-950);
        }

        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 28px;
            margin-bottom: 30px;
        }

        .section-heading > div { max-width: 730px; }

        .kicker {
            display: block;
            margin-bottom: 9px;
            color: var(--blue-700);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
            text-transform: uppercase;
        }

        .section-dark .kicker { color: #83d8d7; }

        h2 {
            margin-bottom: 9px;
            color: var(--blue-950);
            font-size: clamp(27px, 3vw, 38px);
            line-height: 1.25;
        }

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

        .section-heading p {
            max-width: 720px;
            margin-bottom: 0;
            color: var(--muted);
            font-size: 15px;
        }

        .section-dark .section-heading p { color: rgba(255,255,255,.7); }

        .text-link {
            flex: 0 0 auto;
            color: var(--blue-800);
            font-size: 14px;
            font-weight: 800;
        }

        .text-link:hover { color: var(--cyan); }

        .toc-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
        }

        .toc-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 17px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .toc-number {
            display: grid;
            place-items: center;
            flex: 0 0 31px;
            height: 31px;
            border-radius: 8px;
            color: #fff;
            background: var(--blue-900);
            font-size: 12px;
            font-weight: 800;
        }

        .toc-item strong {
            display: block;
            margin-bottom: 2px;
            font-size: 14px;
        }

        .toc-item span {
            display: block;
            color: var(--muted);
            font-size: 12px;
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .content-card {
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .content-card:hover {
            transform: translateY(-5px);
            border-color: #b7d3e4;
            box-shadow: var(--shadow-md);
        }

        .card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #dceaf3;
        }

        .card-image img {
            height: 100%;
            transition: transform .35s ease;
        }

        .content-card:hover .card-image img { transform: scale(1.05); }

        .image-shade {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 45%, rgba(7,35,60,.5));
        }

        .badge-row {
            position: absolute;
            right: 12px;
            bottom: 11px;
            left: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            min-height: 23px;
            padding: 0 8px;
            border-radius: 6px;
            color: #fff;
            background: var(--blue-900);
            font-size: 11px;
            font-weight: 800;
        }

        .badge-green { background: var(--success); }
        .badge-amber { background: var(--warning); }

        .card-body { padding: 17px 17px 18px; }

        .card-body h3 {
            margin-bottom: 7px;
            color: var(--blue-950);
            font-size: 16px;
            line-height: 1.4;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            color: var(--muted);
            font-size: 12px;
        }

        .rating {
            color: #bc791b;
            font-weight: 800;
        }

        .directory {
            display: grid;
            grid-template-columns: 1.05fr .95fr;
            gap: 34px;
            align-items: stretch;
        }

        .directory-copy {
            padding: 34px;
            border-radius: var(--radius-lg);
            background: var(--blue-100);
            border: 1px solid #cce4f1;
        }

        .directory-copy h3 {
            margin-bottom: 13px;
            color: var(--blue-950);
            font-size: 24px;
        }

        .directory-copy p {
            margin-bottom: 22px;
            color: #496879;
            font-size: 15px;
        }

        .check-list {
            display: grid;
            gap: 12px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--ink);
            font-size: 14px;
        }

        .check-list li::before {
            content: "✓";
            display: grid;
            place-items: center;
            flex: 0 0 21px;
            height: 21px;
            margin-top: 2px;
            border-radius: 50%;
            color: #fff;
            background: var(--success);
            font-size: 12px;
            font-weight: 800;
        }

        .directory-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .stat-box {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 150px;
            padding: 22px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .stat-box strong {
            color: var(--blue-900);
            font-size: 34px;
            line-height: 1;
        }

        .stat-box span {
            color: var(--muted);
            font-size: 13px;
        }

        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .value-card {
            padding: 27px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .value-icon {
            display: grid;
            place-items: center;
            width: 42px;
            height: 42px;
            margin-bottom: 20px;
            border-radius: 11px;
            color: var(--blue-900);
            background: var(--blue-100);
            font-weight: 900;
        }

        .value-card h3 {
            margin-bottom: 9px;
            color: var(--blue-950);
            font-size: 18px;
        }

        .value-card p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
        }

        .chart-layout {
            display: grid;
            grid-template-columns: .9fr 1.1fr;
            gap: 42px;
            align-items: center;
        }

        .chart-copy h3 {
            margin-bottom: 12px;
            color: #fff;
            font-size: 27px;
        }

        .chart-copy p {
            margin-bottom: 22px;
            color: rgba(255,255,255,.7);
            font-size: 15px;
        }

        .metric-line {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,.13);
            color: rgba(255,255,255,.8);
            font-size: 13px;
        }

        .metric-line strong { color: #9ce9e4; }

        .bar-list {
            display: grid;
            gap: 18px;
            padding: 26px;
            border: 1px solid rgba(255,255,255,.14);
            border-radius: var(--radius-md);
            background: rgba(255,255,255,.06);
        }

        .bar-head {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            color: rgba(255,255,255,.85);
            font-size: 13px;
        }

        .bar-head strong { color: #fff; }

        .bar-track {
            height: 9px;
            overflow: hidden;
            border-radius: 20px;
            background: rgba(255,255,255,.14);
        }

        .bar-fill {
            height: 100%;
            border-radius: inherit;
            background: #83d8d7;
        }

        .bar-fill.b2 { width: 82%; }
        .bar-fill.b3 { width: 74%; }
        .bar-fill.b4 { width: 67%; }
        .bar-fill.b5 { width: 58%; }

        .popular-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .popular-card {
            display: grid;
            grid-template-columns: 130px 1fr;
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .popular-card .card-image { aspect-ratio: auto; min-height: 150px; }

        .popular-card .card-body { align-self: center; }

        .popular-card h3 {
            font-size: 15px;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .category-card {
            position: relative;
            padding: 24px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .category-card::after {
            content: "→";
            position: absolute;
            top: 22px;
            right: 23px;
            color: var(--blue-700);
            font-size: 20px;
        }

        .category-card h3 {
            margin-bottom: 8px;
            color: var(--blue-950);
            font-size: 18px;
        }

        .category-card p {
            min-height: 68px;
            margin-bottom: 15px;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.75;
        }

        .category-tag {
            display: inline-block;
            padding: 4px 9px;
            border-radius: 6px;
            color: var(--blue-800);
            background: var(--blue-100);
            font-size: 11px;
            font-weight: 800;
        }

        .ranking-layout {
            display: grid;
            grid-template-columns: 1fr .8fr;
            gap: 38px;
            align-items: start;
        }

        .ranking-list {
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .rank-item {
            display: grid;
            grid-template-columns: 42px 1fr auto auto;
            gap: 13px;
            align-items: center;
            padding: 13px 18px;
            border-bottom: 1px solid var(--line);
        }

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

        .rank-num {
            color: var(--blue-800);
            font-size: 18px;
            font-weight: 900;
            font-style: italic;
        }

        .rank-item h3 {
            margin: 0 0 2px;
            color: var(--blue-950);
            font-size: 14px;
        }

        .rank-item small {
            color: var(--muted-2);
            font-size: 11px;
        }

        .rank-hot {
            color: var(--warning);
            font-size: 12px;
            font-weight: 800;
        }

        .rank-score {
            min-width: 39px;
            padding: 3px 7px;
            border-radius: 6px;
            color: var(--blue-900);
            background: var(--blue-100);
            font-size: 12px;
            font-weight: 800;
            text-align: center;
        }

        .side-note {
            padding: 29px;
            border-radius: var(--radius-lg);
            color: #fff;
            background: var(--blue-900);
            box-shadow: var(--shadow-md);
        }

        .side-note h3 {
            margin-bottom: 13px;
            font-size: 23px;
        }

        .side-note p {
            margin-bottom: 21px;
            color: rgba(255,255,255,.75);
            font-size: 14px;
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .resource-card {
            padding: 25px;
            border-left: 4px solid var(--cyan);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .resource-card h3 {
            margin-bottom: 8px;
            color: var(--blue-950);
            font-size: 18px;
        }

        .resource-card p {
            margin-bottom: 15px;
            color: var(--muted);
            font-size: 14px;
        }

        .resource-card a {
            color: var(--blue-800);
            font-size: 13px;
            font-weight: 800;
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 32px;
        }

        .news-feature {
            position: relative;
            min-height: 360px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            background: var(--blue-950);
        }

        .news-feature img { height: 100%; }

        .news-feature::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(4,26,45,.92), transparent 65%);
        }

        .news-feature-content {
            position: absolute;
            z-index: 1;
            right: 28px;
            bottom: 25px;
            left: 28px;
            color: #fff;
        }

        .news-feature-content span {
            color: #9ce9e4;
            font-size: 12px;
            font-weight: 800;
        }

        .news-feature-content h3 {
            max-width: 580px;
            margin: 8px 0 0;
            font-size: 25px;
            line-height: 1.35;
        }

        .news-list {
            display: grid;
            gap: 0;
            border-top: 1px solid var(--line);
        }

        .news-item {
            display: grid;
            grid-template-columns: 104px 1fr;
            gap: 15px;
            padding: 15px 0;
            border-bottom: 1px solid var(--line);
        }

        .news-item img {
            height: 75px;
            border-radius: 9px;
        }

        .news-item h3 {
            margin: 0 0 6px;
            color: var(--blue-950);
            font-size: 14px;
            line-height: 1.45;
        }

        .news-item time {
            color: var(--muted-2);
            font-size: 12px;
        }

        .trust-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 15px;
        }

        .trust-item {
            padding: 23px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
        }

        .trust-item strong {
            display: block;
            margin-bottom: 5px;
            color: var(--blue-900);
            font-size: 17px;
        }

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

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 13px;
        }

        details {
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: #fff;
        }

        summary {
            position: relative;
            padding: 17px 45px 17px 19px;
            color: var(--blue-950);
            font-size: 15px;
            font-weight: 800;
            cursor: pointer;
            list-style: none;
        }

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

        summary::after {
            content: "+";
            position: absolute;
            top: 15px;
            right: 18px;
            color: var(--blue-700);
            font-size: 20px;
            font-weight: 400;
        }

        details[open] summary::after { content: "−"; }

        details p {
            margin: 0;
            padding: 0 19px 19px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
        }

        .lead-section {
            padding: 72px 0;
            background: var(--blue-100);
            border-top: 1px solid #cfe4ef;
            border-bottom: 1px solid #cfe4ef;
        }

        .lead-box {
            display: grid;
            grid-template-columns: 1fr .85fr;
            gap: 44px;
            align-items: center;
        }

        .lead-box h2 { margin-bottom: 13px; }

        .lead-box > div > p {
            max-width: 650px;
            margin-bottom: 0;
            color: #506f81;
            font-size: 15px;
        }

        .lead-form {
            display: grid;
            gap: 11px;
            padding: 24px;
            border: 1px solid #c8dfea;
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .lead-form label {
            color: var(--blue-950);
            font-size: 13px;
            font-weight: 800;
        }

        .lead-form input {
            width: 100%;
            height: 44px;
            padding: 0 13px;
            border: 1px solid var(--line-dark);
            border-radius: 8px;
            color: var(--ink);
            background: #fff;
        }

        .lead-form input::placeholder { color: #a1adb6; }

        .form-note {
            margin: 2px 0 0;
            color: var(--muted-2);
            font-size: 11px;
            line-height: 1.5;
        }

        .form-result {
            display: none;
            padding: 10px 12px;
            border-radius: 8px;
            color: var(--success);
            background: #e9f7f2;
            font-size: 12px;
            font-weight: 700;
        }

        .site-footer {
            padding: 55px 0 24px;
            color: rgba(255,255,255,.72);
            background: var(--blue-950);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 38px;
        }

        .footer-brand {
            color: #fff;
            font-size: 18px;
            font-weight: 800;
        }

        .footer-brand span {
            display: block;
            max-width: 300px;
            margin-top: 12px;
            color: rgba(255,255,255,.57);
            font-size: 13px;
            font-weight: 400;
            line-height: 1.8;
        }

        .footer-col h3 {
            margin: 0 0 13px;
            color: #fff;
            font-size: 14px;
        }

        .footer-col a,
        .footer-col p {
            display: block;
            margin: 0 0 8px;
            color: rgba(255,255,255,.58);
            font-size: 13px;
        }

        .footer-col a:hover { color: #9ce9e4; }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,.13);
            color: rgba(255,255,255,.42);
            font-size: 12px;
        }

        @media (max-width: 1024px) {
            .hero-grid, .directory, .chart-layout, .ranking-layout, .news-layout, .lead-box {
                grid-template-columns: 1fr;
            }

            .hero-grid { gap: 35px; }
            .content-grid { grid-template-columns: repeat(3, 1fr); }
            .popular-grid { grid-template-columns: repeat(2, 1fr); }
            .toc-bar { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .container { width: min(var(--container), calc(100% - 32px)); }
            .nav-wrap { min-height: 68px; }
            .brand { min-width: 0; }
            .brand-name { font-size: 15px; }
            .menu-toggle { display: block; }
            .main-nav {
                position: absolute;
                top: 68px;
                right: 16px;
                left: 16px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: 10px;
                border: 1px solid var(--line);
                border-radius: 12px;
                background: #fff;
                box-shadow: var(--shadow-md);
            }

            .main-nav.open { display: flex; }
            .main-nav a { padding: 12px 14px; }
            .hero { padding: 58px 0 55px; }
            h1 { font-size: 40px; }
            .hero-panel { grid-template-columns: 1fr; }
            .hero-note { grid-column: auto; }
            .section { padding: 60px 0; }
            .section-heading { display: block; }
            .section-heading .text-link { display: inline-block; margin-top: 15px; }
            .content-grid, .category-grid, .value-grid, .resource-grid { grid-template-columns: repeat(2, 1fr); }
            .trust-strip { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 520px) {
            .container { width: min(var(--container), calc(100% - 24px)); }
            .brand-mark { width: 38px; height: 38px; }
            .brand-name small { display: none; }
            h1 { font-size: 33px; }
            .hero-lead { font-size: 15px; }
            .hero-actions { align-items: stretch; flex-direction: column; }
            .hero-actions .button { width: 100%; }
            .toc-bar, .content-grid, .popular-grid, .category-grid, .value-grid, .resource-grid, .trust-strip, .faq-grid {
                grid-template-columns: 1fr;
            }
            .directory-copy, .side-note { padding: 24px; }
            .directory-stats { gap: 10px; }
            .stat-box { min-height: 125px; padding: 17px; }
            .stat-box strong { font-size: 28px; }
            .popular-card { grid-template-columns: 112px 1fr; }
            .popular-card .card-image { min-height: 135px; }
            .rank-item { grid-template-columns: 30px 1fr auto; }
            .rank-hot { display: none; }
            .news-feature { min-height: 275px; }
            .news-feature-content h3 { font-size: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 27px 18px; }
            .footer-grid > :first-child { grid-column: 1 / -1; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-top: 7px; }
        }

/* roulang page: category1 */
:root {
 --blue-950:#092c4c;--blue-900:#0f4c81;--blue-800:#1769aa;--blue-700:#2784c6;--blue-100:#e8f3fb;
 --cyan:#25a7b9;--ink:#172b3a;--muted:#6c7e8d;--muted-2:#8b9aa6;--paper:#fff;--surface:#f5f8fb;
 --line:#dfe8ef;--line-dark:#c9d8e4;--success:#16856e;--warning:#c98523;--radius-sm:10px;
 --radius-md:16px;--radius-lg:24px;--shadow-sm:0 8px 22px rgba(22,64,96,.07);--shadow-md:0 18px 45px rgba(15,76,129,.12);
 --container:1180px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:94px}
body{margin:0;color:var(--ink);background:var(--surface);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
img{display:block;width:100%;max-width:100%;object-fit:cover}
button,input{font:inherit}button{cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid rgba(223,232,239,.9);backdrop-filter:blur(16px)}
.nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:250px;color:var(--blue-950);font-weight:800}
.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;color:#fff;background:var(--blue-900);box-shadow:0 8px 18px rgba(15,76,129,.22);font-size:18px}
.brand-name{font-size:17px;line-height:1.2}
.brand-name small{display:block;margin-top:3px;color:var(--muted);font-size:11px;font-weight:600}
.main-nav{display:flex;align-items:center;justify-content:flex-end;gap:4px}
.main-nav a{position:relative;padding:9px 13px;color:var(--muted);border-radius:9px;font-size:14px;font-weight:700;white-space:nowrap}
.main-nav a:hover,.main-nav a:focus-visible,.main-nav a.active{color:var(--blue-900);background:var(--blue-100)}
.menu-toggle{display:none;border:1px solid var(--line);background:var(--paper);color:var(--blue-900);width:42px;height:42px;border-radius:10px;font-size:20px}
.hero{position:relative;overflow:hidden;padding:58px 0 48px;background:linear-gradient(100deg,rgba(9,44,76,.97),rgba(15,76,129,.91) 58%,rgba(30,117,157,.82)),url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1800&q=85") center/cover;color:#fff}
.hero::after{content:"";position:absolute;inset:auto 0 0;height:1px;background:rgba(255,255,255,.22)}
.breadcrumb{position:relative;z-index:1;margin:0 0 20px;color:rgba(255,255,255,.72);font-size:13px}
.breadcrumb a:hover{color:#fff}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:56px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;color:#bfeaf0;font-size:13px;font-weight:800}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan)}
h1,h2,h3,p{margin-top:0}
.hero h1{max-width:720px;margin-bottom:12px;font-size:clamp(34px,4vw,54px);line-height:1.18;font-weight:850}
.hero h1 span{color:#8ce2df}
.hero-subtitle{margin-bottom:14px;color:#fff;font-size:19px;font-weight:700}
.hero-lead{max-width:700px;margin-bottom:24px;color:rgba(255,255,255,.84);font-size:16px;line-height:1.85}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:10px;font-size:14px;font-weight:800;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease}
.button:hover{transform:translateY(-2px)}
.button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(37,167,185,.45);outline-offset:3px}
.button-primary{color:var(--blue-950);background:#8ce2df;box-shadow:0 10px 22px rgba(0,0,0,.12)}
.button-primary:hover{background:#b1efeb}
.button-light{color:#fff;border-color:rgba(255,255,255,.45);background:rgba(255,255,255,.08)}
.button-light:hover{background:rgba(255,255,255,.17)}
.metric-panel{padding:22px;border:1px solid rgba(255,255,255,.24);border-radius:var(--radius-md);background:rgba(255,255,255,.1);backdrop-filter:blur(8px)}
.metric-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;padding-bottom:15px;border-bottom:1px solid rgba(255,255,255,.2);font-size:14px;font-weight:800}
.live-dot{display:inline-flex;align-items:center;gap:7px;color:#c3f2e7;font-size:12px}
.live-dot::before{content:"";width:7px;height:7px;border-radius:50%;background:#69d6a9}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 12px;padding-top:18px}
.metric strong{display:block;font-size:27px;line-height:1.2}
.metric span{display:block;margin-top:5px;color:rgba(255,255,255,.72);font-size:12px}
.section{padding:68px 0}
.section-white{background:var(--paper)}
.section-soft{background:var(--surface)}
.section-dark{color:#fff;background:var(--blue-950)}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-heading h2{margin:0;color:var(--blue-950);font-size:30px;line-height:1.3}
.section-dark .section-heading h2{color:#fff}
.section-heading p{max-width:590px;margin:7px 0 0;color:var(--muted);font-size:14px}
.section-dark .section-heading p{color:rgba(255,255,255,.68)}
.kicker{display:block;margin-bottom:7px;color:var(--blue-700);font-size:12px;font-weight:800}
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.topic-card{position:relative;min-height:204px;padding:22px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper);box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.topic-card:hover{transform:translateY(-4px);border-color:#b9d4e7;box-shadow:var(--shadow-md)}
.topic-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}
.topic-number{color:#a5b7c4;font-size:12px;font-weight:800}
.badge{display:inline-flex;align-items:center;min-height:25px;padding:3px 9px;border-radius:99px;color:var(--blue-900);background:var(--blue-100);font-size:11px;font-weight:800}
.topic-card h3{margin:0 0 8px;color:var(--blue-950);font-size:18px}
.topic-card p{min-height:48px;margin:0 0 16px;color:var(--muted);font-size:13px;line-height:1.75}
.topic-foot{display:flex;justify-content:space-between;align-items:center;padding-top:12px;border-top:1px solid var(--line);color:var(--muted-2);font-size:12px}
.topic-foot strong{color:var(--success);font-size:12px}
.matrix-layout{display:grid;grid-template-columns:.78fr 1.22fr;gap:44px;align-items:start}
.matrix-intro{position:sticky;top:108px}
.matrix-intro h2{margin:0 0 14px;color:var(--blue-950);font-size:30px;line-height:1.3}
.matrix-intro p{margin:0;color:var(--muted);font-size:15px}
.matrix-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.matrix-item{min-height:145px;padding:19px 20px 19px 0;border-bottom:1px solid var(--line)}
.matrix-item:nth-child(odd){margin-right:20px}
.matrix-item h3{margin:0 0 7px;color:var(--blue-900);font-size:16px}
.matrix-item p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}
.comparison{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare-panel{padding:25px;border-radius:var(--radius-md);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.compare-panel.featured{border-color:#9bc9e3;box-shadow:var(--shadow-md)}
.compare-title{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:18px}
.compare-title h3{margin:0;color:var(--blue-950);font-size:18px}
.compare-row{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-top:1px solid var(--line);font-size:13px}
.compare-row span{color:var(--muted)}
.compare-row strong{color:var(--ink);text-align:right}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.milestone{position:relative;padding:0 22px 0 0}
.milestone:not(:last-child)::after{content:"";position:absolute;top:14px;left:30px;right:8px;height:1px;background:#c5dce9}
.milestone-mark{position:relative;z-index:1;width:29px;height:29px;display:grid;place-items:center;margin-bottom:17px;border:2px solid #62b7ca;border-radius:50%;background:var(--paper);color:var(--blue-900);font-size:11px;font-weight:800}
.milestone h3{margin:0 0 6px;color:var(--blue-950);font-size:15px}
.milestone p{margin:0;color:var(--muted);font-size:12px;line-height:1.7}
.rank-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:46px;align-items:start}
.rank-aside{padding:24px;border-radius:var(--radius-md);background:#eaf4fa}
.rank-aside strong{display:block;color:var(--blue-900);font-size:34px;line-height:1.2}
.rank-aside p{margin:8px 0 0;color:var(--muted);font-size:13px}
.rank-list{margin:0;padding:0;list-style:none}
.rank-item{display:grid;grid-template-columns:44px 1fr auto auto;gap:14px;align-items:center;min-height:54px;border-bottom:1px solid var(--line)}
.rank-item:first-child{border-top:1px solid var(--line)}
.rank-num{color:#91a6b5;font-size:14px;font-weight:800}
.rank-item:nth-child(-n+3) .rank-num{color:var(--cyan)}
.rank-name{color:var(--blue-950);font-size:14px;font-weight:750}
.rank-tag{color:var(--muted);font-size:11px}
.rank-score{color:var(--blue-900);font-size:13px;font-weight:800}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.news-card{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;box-shadow:var(--shadow-sm)}
.news-image{height:150px;background:#dceaf1}
.news-image img{height:100%;transition:transform .35s ease}
.news-card:hover .news-image img{transform:scale(1.04)}
.news-body{padding:17px}
.news-body h3{min-height:48px;margin:0 0 12px;color:var(--blue-950);font-size:15px;line-height:1.6}
.news-date{color:var(--muted-2);font-size:12px}
.assurance{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.assurance h2{margin:0 0 12px;font-size:29px}
.assurance p{max-width:620px;margin:0;color:rgba(255,255,255,.72);font-size:14px}
.assurance-points{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.assurance-point{padding:15px;border:1px solid rgba(255,255,255,.18);border-radius:var(--radius-sm);background:rgba(255,255,255,.06)}
.assurance-point strong{display:block;color:#a9e8e4;font-size:14px}
.assurance-point span{display:block;margin-top:3px;color:rgba(255,255,255,.68);font-size:12px}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.faq-item{padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff}
.faq-item summary{display:flex;justify-content:space-between;gap:15px;cursor:pointer;color:var(--blue-950);font-size:14px;font-weight:800;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";color:var(--blue-700);font-size:18px;line-height:1}
.faq-item[open] summary::after{content:"−"}
.faq-item p{margin:12px 0 0;color:var(--muted);font-size:13px;line-height:1.8}
.cta-band{padding:35px;border-radius:var(--radius-lg);background:#e8f3fb;border:1px solid #d0e5f2;display:flex;justify-content:space-between;align-items:center;gap:24px}
.cta-band h2{margin:0 0 6px;color:var(--blue-950);font-size:23px}
.cta-band p{margin:0;color:var(--muted);font-size:14px}
.site-footer{padding:52px 0 20px;background:#082844;color:rgba(255,255,255,.78)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:34px}
.footer-brand{display:block;color:#fff;font-size:16px;font-weight:800;line-height:1.6}
.footer-brand span{display:block;max-width:310px;margin-top:10px;color:rgba(255,255,255,.6);font-size:12px;font-weight:400;line-height:1.8}
.footer-col h3{margin:0 0 12px;color:#fff;font-size:13px}
.footer-col a,.footer-col p{display:block;margin:7px 0;color:rgba(255,255,255,.62);font-size:12px}
.footer-col a:hover{color:#a9e8e4}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;padding-top:17px;border-top:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.52);font-size:11px}
@media(max-width:1024px){
 .brand{min-width:0}.brand-name{max-width:190px;font-size:15px}.main-nav a{padding:8px 9px;font-size:13px}
 .hero-grid{gap:35px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr;gap:22px}
}
@media(max-width:768px){
 .container{width:min(var(--container),calc(100% - 36px))}
 .nav-wrap{min-height:68px;flex-wrap:wrap;gap:10px}
 .menu-toggle{display:block}
 .main-nav{display:none;order:3;width:100%;justify-content:flex-start;overflow-x:auto;padding:0 0 12px}
 .main-nav.is-open{display:flex}
 .main-nav a{flex:0 0 auto}
 .hero{padding:42px 0}
 .hero-grid{grid-template-columns:1fr;gap:26px}
 .hero h1{font-size:38px}
 .metric-panel{max-width:520px}
 .section{padding:52px 0}
 .section-heading{align-items:flex-start;flex-direction:column;gap:8px}
 .section-heading h2,.matrix-intro h2{font-size:26px}
 .matrix-layout,.rank-layout{grid-template-columns:1fr;gap:25px}
 .matrix-intro{position:static}
 .timeline{grid-template-columns:repeat(2,1fr);gap:25px 10px}
 .milestone:nth-child(2)::after{display:none}
 .news-grid{grid-template-columns:repeat(2,1fr)}
 .assurance{grid-template-columns:1fr;gap:25px}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
 .container{width:calc(100% - 30px)}
 .brand-mark{width:38px;height:38px}.brand-name{max-width:210px;font-size:14px}
 .brand-name small{font-size:10px}
 .hero{padding:34px 0}
 .hero h1{font-size:33px}
 .hero-subtitle{font-size:16px}
 .hero-lead{font-size:14px}
 .hero-actions .button{width:100%}
 .metric-panel{padding:17px}
 .metric strong{font-size:23px}
 .section{padding:42px 0}
 .section-heading h2,.matrix-intro h2{font-size:23px}
 .topic-grid,.comparison,.news-grid,.faq-list{grid-template-columns:1fr}
 .topic-card{min-height:0}
 .topic-card p{min-height:0}
 .matrix-list{grid-template-columns:1fr}
 .matrix-item:nth-child(odd){margin-right:0}
 .matrix-item{min-height:0;padding:16px 0}
 .timeline{grid-template-columns:1fr 1fr}
 .rank-aside{padding:18px}
 .rank-item{grid-template-columns:30px 1fr auto;gap:8px}
 .rank-tag{display:none}
 .news-image{height:170px}
 .assurance-points{grid-template-columns:1fr 1fr}
 .cta-band{align-items:flex-start;flex-direction:column;padding:23px}
 .cta-band .button{width:100%}
 .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
 .footer-grid>div:first-child{grid-column:1/-1}
 .footer-bottom{flex-direction:column;gap:7px}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}