/* roulang page: index */
:root {
            --ink: #17151b;
            --ink-soft: #292631;
            --paper: #f7f5f1;
            --paper-deep: #efede7;
            --white: #ffffff;
            --muted: #77737d;
            --line: #e3dfd9;
            --accent: #db5b5d;
            --accent-dark: #ae3f47;
            --gold: #c79b56;
            --teal: #4d8d89;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 8px 22px rgba(24, 21, 27, .07);
            --shadow-md: 0 18px 42px rgba(24, 21, 27, .12);
            --max: 1220px;
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            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%; }
        a { color: inherit; text-decoration: none; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        h1, h2, h3, p { margin: 0; }
        ul { list-style: none; margin: 0; padding: 0; }
        .container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 1.4px;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 26px;
            height: 2px;
            background: var(--accent);
        }
        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 30px;
            margin-bottom: 30px;
        }
        .section-head h2 {
            max-width: 680px;
            margin-top: 9px;
            font-size: clamp(26px, 3vw, 39px);
            line-height: 1.2;
            letter-spacing: 0;
        }
        .section-head p {
            max-width: 570px;
            color: var(--muted);
            font-size: 14px;
        }
        .section-link {
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 800;
            white-space: nowrap;
            border-bottom: 1px solid var(--accent);
            padding-bottom: 4px;
            transition: color .2s ease, border-color .2s ease;
        }
        .section-link:hover { color: var(--ink); border-color: var(--ink); }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(247, 245, 241, .94);
            border-bottom: 1px solid rgba(227, 223, 217, .9);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 34px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex: 0 0 auto;
        }
        .brand-mark {
            display: grid;
            place-items: center;
            width: 38px;
            height: 38px;
            border-radius: 11px;
            color: var(--white);
            background: var(--accent);
            font-size: 18px;
            font-weight: 900;
            box-shadow: 0 7px 16px rgba(219, 91, 93, .25);
        }
        .brand-name {
            font-size: 16px;
            font-weight: 900;
            letter-spacing: .2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
        }
        .main-nav a {
            position: relative;
            padding: 9px 13px;
            color: #67616b;
            font-size: 13px;
            font-weight: 700;
            transition: color .2s ease, background .2s ease;
        }
        .main-nav a::after {
            content: "";
            position: absolute;
            left: 13px;
            right: 13px;
            bottom: 1px;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform .2s ease;
        }
        .main-nav a:hover, .main-nav a.active { color: var(--ink); }
        .main-nav a.active::after, .main-nav a:hover::after { transform: scaleX(1); }
        .nav-action {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 16px;
            border: 1px solid var(--ink);
            border-radius: 999px;
            color: var(--white);
            background: var(--ink);
            font-size: 12px;
            font-weight: 800;
            transition: background .2s ease, transform .2s ease;
        }
        .nav-action:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-2px); }
        .mobile-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 22px; }

        .hero {
            position: relative;
            min-height: 690px;
            display: flex;
            align-items: center;
            overflow: hidden;
            color: var(--white);
            background-color: #211c25;
            background-image: url("https://images.unsplash.com/photo-1515886657613-9f3515b0c78f?auto=format&fit=crop&w=1900&q=88");
            background-size: cover;
            background-position: center 28%;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(20, 17, 23, .68);
        }
        .hero-inner { position: relative; z-index: 1; width: 100%; padding: 94px 0 82px; }
        .hero-copy { max-width: 760px; }
        .hero .eyebrow { color: #f1bd88; }
        .hero .eyebrow::before { background: #f1bd88; }
        .hero h1 {
            max-width: 760px;
            margin: 18px 0 23px;
            font-size: clamp(42px, 7vw, 82px);
            line-height: 1.08;
            letter-spacing: 0;
        }
        .hero h1 strong { color: #f1bd88; font-weight: 900; }
        .hero-lead {
            max-width: 720px;
            color: rgba(255, 255, 255, .84);
            font-size: 16px;
            line-height: 2;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 34px; }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 48px;
            padding: 0 22px;
            border: 1px solid transparent;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 900;
            transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
        }
        .btn:hover { transform: translateY(-2px); }
        .btn-primary { color: var(--white); background: var(--accent); box-shadow: 0 9px 20px rgba(219, 91, 93, .25); }
        .btn-primary:hover { background: var(--accent-dark); }
        .btn-light { color: var(--white); border-color: rgba(255,255,255,.4); background: rgba(255,255,255,.08); }
        .btn-light:hover { color: var(--ink); background: var(--white); border-color: var(--white); }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 42px;
        }
        .hero-badge {
            padding: 8px 13px;
            border: 1px solid rgba(255,255,255,.22);
            border-radius: 999px;
            color: rgba(255,255,255,.84);
            background: rgba(255,255,255,.09);
            font-size: 12px;
        }

        main { overflow: hidden; }
        .section { padding: 88px 0; }
        .section-white { background: var(--white); }
        .section-soft { background: var(--paper-deep); }
        .section-dark { color: var(--white); background: var(--ink); }
        .section-dark .section-head p { color: #bdb7c0; }
        .section-dark .eyebrow { color: #e7b477; }
        .section-dark .eyebrow::before { background: #e7b477; }

        .intro-strip {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 30px;
            align-items: center;
            padding: 34px 0;
            border-bottom: 1px solid var(--line);
        }
        .intro-strip h2 { max-width: 610px; font-size: 25px; line-height: 1.35; }
        .intro-strip p { color: var(--muted); font-size: 14px; }

        .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: var(--white);
            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: #d6b3a4; box-shadow: var(--shadow-md); }
        .thumb { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: #ddd; }
        .thumb img { height: 100%; object-fit: cover; transition: transform .45s ease; }
        .content-card:hover .thumb img { transform: scale(1.05); }
        .thumb::after {
            content: "";
            position: absolute;
            inset: 58% 0 0;
            background: rgba(20, 17, 23, .4);
            pointer-events: none;
        }
        .status {
            position: absolute;
            z-index: 1;
            top: 12px;
            left: 12px;
            padding: 4px 8px;
            border-radius: 6px;
            color: var(--white);
            background: var(--accent);
            font-size: 10px;
            font-weight: 900;
            letter-spacing: .4px;
        }
        .status.gold { background: var(--gold); }
        .status.teal { background: var(--teal); }
        .card-play {
            position: absolute;
            z-index: 2;
            right: 12px;
            bottom: 12px;
            display: grid;
            place-items: center;
            width: 34px;
            height: 34px;
            border: 1px solid rgba(255,255,255,.65);
            border-radius: 50%;
            color: var(--white);
            background: rgba(20,17,23,.5);
            font-size: 13px;
        }
        .card-body { padding: 16px 16px 17px; }
        .card-title { font-size: 15px; line-height: 1.4; font-weight: 900; }
        .card-desc { min-height: 48px; margin-top: 8px; color: var(--muted); font-size: 12px; line-height: 1.65; }
        .card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
        .rating { color: var(--gold); font-size: 13px; font-weight: 900; }
        .rating span { margin-left: 4px; color: var(--ink); }
        .card-tag { color: var(--muted); font-size: 11px; }

        .feature-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 20px; }
        .feature-card {
            position: relative;
            min-height: 355px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            color: var(--white);
            background: #27222c;
        }
        .feature-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .72; }
        .feature-card::after { content: ""; position: absolute; inset: 0; background: rgba(18, 15, 20, .48); }
        .feature-content { position: relative; z-index: 1; min-height: 355px; display: flex; flex-direction: column; justify-content: end; padding: 30px; }
        .feature-content h3 { max-width: 520px; font-size: 31px; line-height: 1.25; }
        .feature-content p { max-width: 520px; margin-top: 10px; color: rgba(255,255,255,.75); font-size: 13px; }
        .feature-small { display: flex; flex-direction: column; justify-content: space-between; padding: 28px; color: var(--white); border-radius: var(--radius-lg); background: var(--teal); }
        .feature-small h3 { max-width: 220px; font-size: 27px; line-height: 1.25; }
        .feature-small p { color: rgba(255,255,255,.82); font-size: 13px; }
        .feature-number { color: rgba(255,255,255,.34); font-size: 55px; line-height: 1; font-weight: 900; }

        .category-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
        .category {
            min-height: 190px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 20px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--paper);
            transition: background .2s ease, color .2s ease, transform .2s ease;
        }
        .category:hover { color: var(--white); background: var(--ink); transform: translateY(-4px); }
        .category-icon { color: var(--accent); font-size: 24px; font-weight: 900; }
        .category h3 { font-size: 17px; }
        .category p { color: var(--muted); font-size: 12px; line-height: 1.7; }
        .category:hover p { color: #c8c1cb; }

        .collection-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: center; }
        .collection-copy h2 { margin: 12px 0 17px; font-size: 36px; line-height: 1.25; }
        .collection-copy > p { color: var(--muted); font-size: 14px; }
        .collection-list { margin-top: 25px; border-top: 1px solid var(--line); }
        .collection-list li { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
        .collection-list span { color: var(--muted); }
        .collection-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
        .collection-visual img { height: 240px; object-fit: cover; border-radius: var(--radius-md); }
        .collection-visual img:first-child { margin-top: 35px; }
        .collection-visual img:last-child { margin-bottom: 35px; }

        .ranking-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .rank-list { border-top: 1px solid #3c3541; }
        .rank-item { display: grid; grid-template-columns: 38px 1fr auto auto; gap: 14px; align-items: center; padding: 15px 4px; border-bottom: 1px solid #3c3541; }
        .rank-no { color: #8f8792; font-size: 18px; font-weight: 900; }
        .rank-item:nth-child(-n+3) .rank-no { color: #e7b477; }
        .rank-name { font-size: 14px; font-weight: 800; }
        .rank-type { padding: 3px 7px; border: 1px solid #5a515e; border-radius: 5px; color: #c5bdc8; font-size: 10px; }
        .rank-hot { color: #e7b477; font-size: 12px; font-weight: 800; }

        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .news-card { display: grid; grid-template-columns: 125px 1fr; gap: 17px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); transition: transform .2s ease, box-shadow .2s ease; }
        .news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
        .news-card img { height: 106px; object-fit: cover; border-radius: 9px; }
        .news-date { color: var(--accent); font-size: 11px; font-weight: 800; }
        .news-card h3 { margin-top: 5px; font-size: 14px; line-height: 1.5; }
        .news-card p { margin-top: 6px; color: var(--muted); font-size: 11px; line-height: 1.55; }

        .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .trust-item { padding: 25px 22px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); }
        .trust-item strong { display: block; color: var(--accent); font-size: 30px; line-height: 1.2; }
        .trust-item h3 { margin-top: 9px; font-size: 15px; }
        .trust-item p { margin-top: 6px; color: var(--muted); font-size: 12px; line-height: 1.65; }

        .entry-section { padding: 78px 0; color: var(--white); background: var(--accent-dark); }
        .entry-wrap { display: flex; align-items: center; justify-content: space-between; gap: 35px; }
        .entry-wrap h2 { max-width: 600px; font-size: 36px; line-height: 1.28; }
        .entry-wrap p { max-width: 620px; margin-top: 11px; color: rgba(255,255,255,.78); font-size: 14px; }
        .entry-wrap .btn-light { flex: 0 0 auto; }

        .faq-list { max-width: 880px; margin: 0 auto; border-top: 1px solid var(--line); }
        details { border-bottom: 1px solid var(--line); }
        summary { display: flex; justify-content: space-between; gap: 20px; padding: 21px 0; cursor: pointer; list-style: none; font-size: 16px; font-weight: 900; }
        summary::-webkit-details-marker { display: none; }
        summary::after { content: "+"; color: var(--accent); font-size: 22px; font-weight: 400; }
        details[open] summary::after { content: "−"; }
        details p { max-width: 780px; padding: 0 35px 22px 0; color: var(--muted); font-size: 13px; }

        .site-footer { padding: 58px 0 25px; color: #c8c1cb; background: #211d25; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 30px; padding-bottom: 42px; }
        .footer-brand .brand-name { color: var(--white); }
        .footer-brand p { max-width: 295px; margin-top: 16px; color: #918995; font-size: 12px; line-height: 1.8; }
        .footer-col h3 { margin-bottom: 13px; color: var(--white); font-size: 13px; }
        .footer-col a { display: block; width: fit-content; margin: 7px 0; color: #918995; font-size: 12px; transition: color .2s ease; }
        .footer-col a:hover { color: #f1bd88; }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid #3c3541; color: #77717d; font-size: 11px; }
        .footer-note { color: #a39aa6; }

        :focus-visible { outline: 3px solid rgba(219, 91, 93, .45); outline-offset: 3px; }

        @media (max-width: 1024px) {
            .container { width: min(var(--max), calc(100% - 36px)); }
            .main-nav { gap: 0; }
            .main-nav a { padding-inline: 9px; }
            .content-grid { grid-template-columns: repeat(3, 1fr); }
            .category-grid { grid-template-columns: repeat(3, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .site-header { position: relative; }
            .nav-wrap { min-height: 70px; }
            .mobile-toggle { display: block; margin-left: auto; }
            .main-nav {
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 18px 17px;
                border-bottom: 1px solid var(--line);
                background: var(--paper);
                box-shadow: var(--shadow-sm);
            }
            .main-nav.open { display: flex; }
            .main-nav a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
            .main-nav a::after { left: 4px; right: auto; width: 25px; bottom: 0; }
            .nav-action { display: none; }
            .hero { min-height: 620px; background-position: 62% center; }
            .hero-inner { padding: 70px 0 60px; }
            .hero h1 { font-size: clamp(39px, 10vw, 65px); }
            .intro-strip, .collection-layout, .feature-grid, .ranking-layout { grid-template-columns: 1fr; }
            .section { padding: 64px 0; }
            .section-head { display: block; margin-bottom: 24px; }
            .section-head p { margin-top: 12px; }
            .section-link { display: inline-block; margin-top: 15px; }
            .content-grid { grid-template-columns: repeat(2, 1fr); }
            .category-grid { grid-template-columns: repeat(2, 1fr); }
            .trust-grid { grid-template-columns: repeat(2, 1fr); }
            .entry-wrap { display: block; }
            .entry-wrap .btn { margin-top: 24px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .container { width: min(var(--max), calc(100% - 28px)); }
            .brand-name { font-size: 14px; }
            .hero { min-height: 650px; }
            .hero h1 { margin-top: 15px; font-size: 41px; }
            .hero-lead { font-size: 14px; line-height: 1.85; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .hero-actions .btn { width: 100%; }
            .content-grid, .category-grid, .news-grid, .trust-grid { grid-template-columns: 1fr; }
            .content-grid .content-card { display: grid; grid-template-columns: 112px 1fr; }
            .content-grid .thumb { aspect-ratio: 1 / 1.25; }
            .content-grid .card-body { padding: 13px; }
            .content-grid .card-desc { min-height: 0; }
            .feature-content, .feature-small { padding: 23px; }
            .feature-card, .feature-content { min-height: 310px; }
            .feature-small { min-height: 230px; }
            .collection-visual img { height: 180px; }
            .rank-item { grid-template-columns: 28px 1fr auto; gap: 9px; }
            .rank-type { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 25px 18px; }
            .footer-bottom { display: block; }
            .footer-note { margin-top: 7px; }
        }