/* roulang page: index */
:root {
            --navy: #102a43;
            --navy-deep: #081d31;
            --blue: #1769aa;
            --blue-light: #eaf4fb;
            --cyan: #39a8c8;
            --ink: #14212b;
            --muted: #647482;
            --line: #dbe6ed;
            --surface: #ffffff;
            --soft: #f5f8fa;
            --warm: #f5a45b;
            --radius: 16px;
            --shadow: 0 14px 40px rgba(16, 42, 67, .09);
            --shadow-hover: 0 18px 46px rgba(16, 42, 67, .15);
            --container: 1180px;
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--surface);
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img { display: block; width: 100%; max-width: 100%; object-fit: cover; }
        a { color: inherit; text-decoration: none; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(57, 168, 200, .42); outline-offset: 3px; }
        .container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--blue);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 1.5px;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 26px;
            height: 2px;
            background: var(--warm);
        }
        .section-head {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 28px;
            margin-bottom: 30px;
        }
        .section-head h2 {
            margin: 8px 0 0;
            max-width: 700px;
            color: var(--navy);
            font-size: clamp(25px, 3vw, 38px);
            line-height: 1.25;
            letter-spacing: 0;
        }
        .section-head p {
            max-width: 530px;
            margin: 0;
            color: var(--muted);
        }
        .section {
            padding: 88px 0;
            border-top: 1px solid rgba(219, 230, 237, .72);
        }
        .section-soft { background: var(--soft); }
        .section-blue { background: var(--blue-light); }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(255,255,255,.94);
            border-bottom: 1px solid rgba(219,230,237,.9);
            backdrop-filter: blur(14px);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 245px;
            color: var(--navy);
            font-weight: 900;
            font-size: 17px;
            line-height: 1.15;
        }
        .brand-mark {
            width: 38px;
            height: 38px;
            display: grid;
            place-items: center;
            color: #fff;
            background: var(--navy);
            border-radius: 10px;
            font-size: 15px;
            box-shadow: 0 7px 18px rgba(16,42,67,.2);
        }
        .brand small {
            display: block;
            margin-top: 3px;
            color: var(--muted);
            font-size: 10px;
            font-weight: 600;
            letter-spacing: 1px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 5px;
        }
        .nav-links a {
            padding: 9px 12px;
            border-radius: 8px;
            color: #496174;
            font-size: 13px;
            font-weight: 700;
            transition: color .2s, background .2s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--blue);
            background: var(--blue-light);
        }
        .nav-action {
            color: #fff !important;
            background: var(--blue) !important;
            padding-inline: 17px !important;
        }
        .menu-toggle { display: none; border: 0; background: transparent; color: var(--navy); font-size: 24px; }

        .hero {
            position: relative;
            overflow: hidden;
            padding: 86px 0 76px;
            background: var(--navy-deep);
            color: #fff;
        }
        .hero::after {
            content: "";
            position: absolute;
            right: -150px;
            top: -210px;
            width: 620px;
            height: 620px;
            border: 1px solid rgba(112, 202, 226, .22);
            border-radius: 50%;
            box-shadow: 0 0 0 48px rgba(112, 202, 226, .045), 0 0 0 100px rgba(112, 202, 226, .03);
        }
        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.05fr .95fr;
            gap: 72px;
            align-items: center;
        }
        .hero .eyebrow { color: #84d3e3; }
        .hero h1 {
            max-width: 680px;
            margin: 15px 0 20px;
            font-size: clamp(34px, 5vw, 66px);
            line-height: 1.12;
            letter-spacing: 0;
        }
        .hero h1 strong { color: #7bd4e2; font-weight: 900; }
        .hero-lead {
            max-width: 650px;
            margin: 0;
            color: #c9dbe6;
            font-size: 17px;
            line-height: 1.9;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 30px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            border-radius: 9px;
            font-size: 14px;
            font-weight: 800;
            transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
        }
        .btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(16,42,67,.16); }
        .btn-primary { color: #fff; background: var(--blue); }
        .btn-primary:hover { background: #0f5b96; }
        .btn-light { color: var(--navy); background: #fff; }
        .btn-outline { color: #d7edf3; border-color: rgba(215,237,243,.55); background: transparent; }
        .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.08); }
        .hero-panel {
            position: relative;
            padding: 28px;
            border: 1px solid rgba(160,220,230,.24);
            border-radius: var(--radius);
            background: rgba(255,255,255,.07);
            box-shadow: 0 24px 55px rgba(0,0,0,.22);
        }
        .hero-panel-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255,255,255,.13);
        }
        .hero-panel-title { font-weight: 800; }
        .live-dot { color: #7bd4e2; font-size: 12px; }
        .live-dot::before { content: "●"; margin-right: 6px; }
        .hero-stat {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin: 22px 0;
        }
        .stat-box {
            padding: 15px 10px;
            border-radius: 10px;
            background: rgba(255,255,255,.08);
        }
        .stat-box b { display: block; color: #fff; font-size: 24px; line-height: 1.2; }
        .stat-box span { color: #a9c4d0; font-size: 11px; }
        .hero-list { display: grid; gap: 13px; }
        .hero-list-item { display: flex; align-items: center; gap: 12px; color: #c5d7df; font-size: 13px; }
        .hero-list-item i {
            width: 24px;
            height: 24px;
            display: grid;
            place-items: center;
            flex: 0 0 24px;
            border-radius: 50%;
            color: #8be0ed;
            background: rgba(57,168,200,.18);
            font-style: normal;
            font-size: 11px;
        }

        .catalog-layout { display: grid; grid-template-columns: 1fr 290px; gap: 28px; }
        .catalog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .media-card {
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: #fff;
            box-shadow: var(--shadow);
            transition: transform .22s, box-shadow .22s;
        }
        .media-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
        .media-image { position: relative; height: 180px; overflow: hidden; }
        .media-image img { height: 100%; transition: transform .4s; }
        .media-card:hover .media-image img { transform: scale(1.04); }
        .media-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 48%, rgba(8,29,49,.62));
        }
        .badge {
            position: absolute;
            z-index: 1;
            top: 12px;
            left: 12px;
            display: inline-flex;
            padding: 3px 8px;
            border-radius: 5px;
            color: #fff;
            background: var(--blue);
            font-size: 11px;
            font-weight: 800;
        }
        .score {
            position: absolute;
            z-index: 1;
            right: 12px;
            bottom: 10px;
            color: #fff;
            font-size: 13px;
            font-weight: 800;
        }
        .media-info { padding: 15px 16px 17px; }
        .media-info h3 { margin: 0 0 6px; color: var(--navy); font-size: 16px; line-height: 1.35; }
        .media-info p { margin: 0; color: var(--muted); font-size: 12px; }
        .catalog-side {
            padding: 24px;
            border-radius: var(--radius);
            background: var(--navy);
            color: #fff;
            box-shadow: var(--shadow);
        }
        .catalog-side h3 { margin: 0 0 12px; font-size: 20px; }
        .catalog-side p { margin: 0 0 18px; color: #b8ceda; font-size: 13px; }
        .side-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
        .side-list li { padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
        .side-list a { display: flex; justify-content: space-between; color: #dfedf2; font-size: 13px; }
        .side-list a:hover { color: #8be0ed; }

        .value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .value-item { padding: 28px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
        .value-icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 19px; border-radius: 10px; color: var(--blue); background: var(--blue-light); font-weight: 900; }
        .value-item h3 { margin: 0 0 9px; font-size: 19px; color: var(--navy); }
        .value-item p { margin: 0; color: var(--muted); font-size: 13px; }

        .chart-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 58px; align-items: center; }
        .chart-copy h2 { margin: 9px 0 16px; color: var(--navy); font-size: 35px; line-height: 1.3; }
        .chart-copy p { margin: 0; color: var(--muted); }
        .chart-box { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
        .chart-title { display: flex; justify-content: space-between; margin-bottom: 25px; color: var(--navy); font-weight: 800; }
        .bar-row { display: grid; grid-template-columns: 105px 1fr 42px; align-items: center; gap: 12px; margin: 16px 0; color: var(--muted); font-size: 12px; }
        .bar-track { height: 9px; overflow: hidden; border-radius: 5px; background: #edf2f5; }
        .bar-fill { height: 100%; border-radius: inherit; background: var(--blue); }
        .bar-row b { color: var(--navy); text-align: right; }

        .recommend-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
        .recommend-card { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; transition: transform .2s, box-shadow .2s; }
        .recommend-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .recommend-card img { height: 170px; }
        .recommend-card div { padding: 12px; }
        .recommend-card h3 { margin: 0 0 3px; color: var(--navy); font-size: 14px; }
        .recommend-card span { color: var(--muted); font-size: 11px; }

        .category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
        .category {
            min-height: 190px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 22px;
            border-radius: var(--radius);
            color: #fff;
            background: var(--navy);
        }
        .category:nth-child(2) { background: #1769aa; }
        .category:nth-child(3) { color: var(--navy); background: #d7edf3; }
        .category:nth-child(4) { color: var(--navy); background: #f8dfc6; }
        .category h3 { margin: 0; font-size: 20px; }
        .category p { margin: 18px 0 0; opacity: .8; font-size: 13px; line-height: 1.65; }

        .ranking-layout { display: grid; grid-template-columns: 1fr .8fr; gap: 28px; }
        .rank-list { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
        .rank-item {
            display: grid;
            grid-template-columns: 42px 1fr 72px 62px;
            align-items: center;
            gap: 12px;
            padding: 15px 19px;
            border-bottom: 1px solid #edf1f3;
        }
        .rank-item:last-child { border-bottom: 0; }
        .rank-num { color: #93a5b1; font-size: 17px; font-weight: 900; }
        .rank-item:nth-child(-n+3) .rank-num { color: var(--warm); }
        .rank-name { color: var(--navy); font-weight: 800; font-size: 14px; }
        .rank-type { display: inline-block; width: max-content; padding: 2px 7px; color: var(--blue); background: var(--blue-light); border-radius: 4px; font-size: 10px; }
        .rank-hot { color: var(--muted); font-size: 12px; }
        .rank-score { color: var(--blue); font-weight: 900; font-size: 14px; text-align: right; }

        .quote-panel { padding: 36px; border-radius: var(--radius); color: #fff; background: var(--navy-deep); }
        .quote-panel blockquote { margin: 0 0 24px; font-size: 22px; line-height: 1.6; }
        .quote-panel blockquote::before { content: "“"; color: #7bd4e2; font-size: 42px; line-height: 0; vertical-align: -12px; margin-right: 5px; }
        .quote-author { display: flex; align-items: center; gap: 12px; color: #b8ceda; font-size: 13px; }
        .author-dot { width: 32px; height: 32px; border-radius: 50%; background: #368aa8; }

        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .news-card { display: grid; grid-template-columns: 118px 1fr; gap: 16px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; transition: box-shadow .2s; }
        .news-card:hover { box-shadow: var(--shadow); }
        .news-card img { height: 95px; border-radius: 8px; }
        .news-card h3 { margin: 2px 0 8px; color: var(--navy); font-size: 15px; line-height: 1.4; }
        .news-card time { color: var(--muted); font-size: 11px; }

        .form-section { background: var(--blue-light); }
        .form-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 55px; align-items: center; }
        .form-layout h2 { margin: 9px 0 15px; color: var(--navy); font-size: 36px; line-height: 1.3; }
        .form-layout p { margin: 0; color: var(--muted); }
        .signup-form { padding: 27px; border: 1px solid #cfe1e9; border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
        .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
        .field { margin-bottom: 14px; }
        .field label { display: block; margin-bottom: 6px; color: var(--navy); font-size: 12px; font-weight: 800; }
        .field input {
            width: 100%;
            height: 44px;
            padding: 0 13px;
            border: 1px solid var(--line);
            border-radius: 8px;
            color: var(--ink);
            background: #fbfdfe;
        }
        .field input:focus { border-color: var(--blue); outline: 2px solid rgba(23,105,170,.14); }
        .form-note { margin-top: 13px; color: var(--muted); font-size: 11px; }
        .form-message { display: none; margin-top: 11px; color: #23744f; font-size: 12px; font-weight: 700; }

        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        details { padding: 20px 22px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
        summary { cursor: pointer; color: var(--navy); font-weight: 800; }
        details p { margin: 13px 0 0; color: var(--muted); font-size: 13px; }

        .trust-bar { padding: 28px 0; background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
        .trust-items { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
        .trust-item { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
        .trust-item b { display: block; color: var(--navy); font-size: 14px; }
        .trust-icon { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 34px; color: var(--blue); background: var(--blue-light); border-radius: 8px; font-weight: 900; }

        .site-footer { padding: 62px 0 28px; color: #a9c1ce; background: var(--navy-deep); }
        .footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 40px; padding-bottom: 42px; }
        .footer-brand { color: #fff; font-size: 18px; font-weight: 900; }
        .footer-brand p { max-width: 280px; margin: 14px 0 0; color: #9fb9c6; font-size: 12px; font-weight: 400; line-height: 1.8; }
        .footer-col h3 { margin: 0 0 14px; color: #fff; font-size: 14px; }
        .footer-col a { display: block; margin: 8px 0; color: #9fb9c6; font-size: 12px; }
        .footer-col a:hover { color: #81d7e3; }
        .copyright { padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: #83a1b0; font-size: 11px; }

        @media (max-width: 1024px) {
            .hero-grid, .chart-layout, .ranking-layout, .form-layout { gap: 35px; }
            .catalog-grid { grid-template-columns: repeat(2, 1fr); }
            .recommend-grid { grid-template-columns: repeat(3, 1fr); }
            .category-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .nav-links a { padding-inline: 8px; }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 32px, var(--container)); }
            .nav-wrap { min-height: 68px; }
            .brand { min-width: 0; font-size: 14px; }
            .brand small { display: none; }
            .menu-toggle { display: block; }
            .nav-links {
                position: absolute;
                top: 68px;
                left: 16px;
                right: 16px;
                display: none;
                padding: 9px;
                flex-direction: column;
                align-items: stretch;
                border: 1px solid var(--line);
                border-radius: 12px;
                background: #fff;
                box-shadow: var(--shadow);
            }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 11px 13px; }
            .hero { padding: 65px 0 58px; }
            .hero-grid, .catalog-layout, .chart-layout, .ranking-layout, .form-layout { grid-template-columns: 1fr; }
            .hero-panel { max-width: 620px; }
            .section { padding: 62px 0; }
            .section-head { display: block; }
            .section-head p { margin-top: 14px; }
            .value-grid { grid-template-columns: 1fr; }
            .recommend-grid { grid-template-columns: repeat(3, 1fr); }
            .recommend-card img { height: 135px; }
            .trust-items { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 36px; }
            .hero-lead { font-size: 15px; }
            .hero-buttons .btn { width: 100%; }
            .catalog-grid, .recommend-grid, .category-grid, .news-grid, .faq-grid { grid-template-columns: 1fr; }
            .media-image { height: 210px; }
            .recommend-card { display: grid; grid-template-columns: 120px 1fr; }
            .recommend-card img { height: 100%; min-height: 116px; }
            .rank-item { grid-template-columns: 30px 1fr 52px; }
            .rank-hot { display: none; }
            .form-row { grid-template-columns: 1fr; gap: 0; }
            .trust-items { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px 18px; }
            .footer-brand { grid-column: 1 / -1; }
            .chart-box { padding: 19px 14px; }
            .bar-row { grid-template-columns: 80px 1fr 34px; gap: 7px; }
        }