/* roulang page: index */
:root {
      color-scheme: dark;
      --ink: #f5f3ee;
      --muted: #a9b4af;
      --subtle: #71817c;
      --base: #111b1b;
      --panel: #192525;
      --panel-light: #20302e;
      --line: rgba(222, 237, 229, .13);
      --mint: #a9e5c5;
      --lime: #d5e89a;
      --coral: #f1a58e;
      --radius: 8px;
      --shadow: 0 18px 48px rgba(0, 0, 0, .2);
      --container: 1180px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      background: var(--base);
      color: var(--ink);
      font: 16px/1.7 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { display: block; width: 100%; }
    :focus-visible { outline: 3px solid var(--lime); outline-offset: 4px; }
    .container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
    .site-header {
      position: sticky; z-index: 20; top: 0;
      background: rgba(17, 27, 27, .92);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(16px);
    }
    .nav {
      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: 0; }
    .brand-mark {
      width: 38px; height: 38px; display: grid; place-items: center;
      flex: 0 0 auto; border-radius: 6px;
      background: var(--mint); color: #12201b; font-weight: 900; font-size: 18px;
    }
    .brand-name { font-size: 15px; font-weight: 760; line-height: 1.25; }
    .nav-links { display: flex; align-items: center; gap: 26px; }
    .nav-links a { color: var(--muted); font-size: 14px; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--mint); }
    .nav-note {
      color: var(--muted); border: 1px solid var(--line);
      padding: 7px 12px; border-radius: 999px; font-size: 12px; white-space: nowrap;
    }
    .hero {
      position: relative; overflow: hidden; isolation: isolate;
      min-height: 610px; display: flex; align-items: center;
      border-bottom: 1px solid var(--line);
      background: #13201f url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=2000&q=88") center 42% / cover no-repeat;
    }
    .hero::before {
      content: ""; position: absolute; inset: 0; z-index: -1;
      background: linear-gradient(90deg, rgba(12, 20, 20, .96) 0%, rgba(12, 20, 20, .8) 48%, rgba(12, 20, 20, .3) 100%),
                  linear-gradient(0deg, rgba(12,20,20,.56), transparent 55%);
    }
    .hero-inner { padding-block: 82px 72px; max-width: 780px; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 9px;
      color: var(--mint); font-size: 12px; font-weight: 750; letter-spacing: 0;
      text-transform: none;
    }
    .eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
    h1 { margin: 19px 0 12px; max-width: 760px; font-size: clamp(38px, 5vw, 62px); line-height: 1.16; font-weight: 780; }
    h1 em { color: var(--mint); font-style: normal; }
    .hero-subtitle { margin: 0; color: #d8e4dd; font-size: 20px; font-weight: 560; }
    .hero-copy { max-width: 690px; margin: 18px 0 0; color: #c0cbc5; font-size: 15px; line-height: 1.9; }
    .hero-checks { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 25px; color: #e0e9e3; font-size: 13px; }
    .hero-checks span { display: inline-flex; align-items: center; gap: 8px; }
    .hero-checks span::before { content: "✓"; color: var(--mint); font-weight: 800; }
    .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
    .button {
      min-height: 46px; display: inline-flex; justify-content: center; align-items: center;
      gap: 9px; padding: 0 18px; border: 1px solid transparent; border-radius: 5px;
      font-size: 14px; font-weight: 720; cursor: pointer; transition: transform .2s, background .2s, border-color .2s;
    }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #14211b; background: var(--mint); }
    .button-primary:hover { background: #c1f0d4; }
    .button-secondary { color: var(--ink); border-color: rgba(245,243,238,.35); background: rgba(17,27,27,.2); }
    .button-secondary:hover { border-color: var(--mint); background: rgba(169,229,197,.08); }
    .hero-footnote { color: #aebbb4; font-size: 12px; margin-top: 15px; }
    main section { padding: 76px 0; border-bottom: 1px solid var(--line); }
    main section:nth-of-type(even) { background: #14201f; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 30px; }
    .section-kicker { margin: 0 0 6px; color: var(--mint); font-size: 12px; font-weight: 750; }
    h2 { margin: 0; font-size: 30px; line-height: 1.3; font-weight: 740; }
    .section-intro { max-width: 710px; margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
    .text-link { color: var(--mint); font-size: 13px; white-space: nowrap; }
    .text-link:hover { color: var(--lime); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
    .metric { min-height: 142px; padding: 25px; background: var(--panel); border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--mint); font-size: 31px; line-height: 1.2; }
    .metric span { display: block; margin-top: 9px; color: var(--muted); font-size: 13px; }
    .story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: center; }
    .story-photo { height: 340px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line); }
    .story-copy h2 { max-width: 480px; }
    .story-copy p { color: var(--muted); font-size: 14px; line-height: 1.95; }
    .story-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
    .story-point { padding-top: 13px; border-top: 1px solid var(--line); color: #dfe8e2; font-size: 13px; }
    .story-point b { display: block; color: var(--mint); font-size: 13px; margin-bottom: 3px; }
    .category-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .category {
      min-height: 188px; padding: 23px; background: var(--base);
      border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
      transition: background .2s ease;
    }
    .category:hover { background: var(--panel-light); }
    .category-index { color: var(--coral); font-size: 12px; font-weight: 750; }
    .category h3 { margin: 15px 0 7px; font-size: 17px; }
    .category p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
    .feature-band {
      padding: 35px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px;
      background: var(--panel-light); border: 1px solid var(--line); border-left: 3px solid var(--mint);
    }
    .feature-band h2 { font-size: 23px; }
    .feature-band p { max-width: 760px; color: var(--muted); font-size: 14px; margin: 9px 0 0; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }
    .tag { color: #d3e3d9; background: rgba(169,229,197,.08); border: 1px solid rgba(169,229,197,.2); border-radius: 3px; padding: 5px 9px; font-size: 11px; }
    .title-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .title-card { min-width: 0; background: var(--panel); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .title-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(169,229,197,.4); }
    .poster { aspect-ratio: 4 / 3; overflow: hidden; position: relative; background: var(--panel-light); }
    .poster img { height: 100%; object-fit: cover; transition: transform .4s; }
    .title-card:hover .poster img { transform: scale(1.04); }
    .poster::after { content: ""; position: absolute; inset: 45% 0 0; background: linear-gradient(transparent, rgba(0,0,0,.65)); }
    .badge { position: absolute; z-index: 1; top: 11px; left: 11px; padding: 4px 7px; color: #112019; background: var(--lime); border-radius: 3px; font-size: 10px; font-weight: 800; }
    .score { position: absolute; z-index: 1; right: 11px; bottom: 10px; color: white; font-size: 12px; font-weight: 750; }
    .title-info { padding: 14px; }
    .title-info h3 { overflow: hidden; margin: 0; color: #f1f3ef; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
    .title-info p { margin: 6px 0 0; color: var(--muted); font-size: 11px; }
    .split-feature { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: center; }
    .split-feature img { height: 330px; object-fit: cover; border-radius: var(--radius); }
    .split-feature h2 { margin-bottom: 12px; }
    .split-feature p { color: var(--muted); font-size: 14px; line-height: 1.9; }
    .benefit-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; margin-top: 20px; }
    .benefit { padding: 14px 0; border-top: 1px solid var(--line); }
    .benefit b { display: block; color: var(--mint); font-size: 13px; }
    .benefit span { color: var(--muted); font-size: 12px; }
    .rank-list { border-top: 1px solid var(--line); }
    .rank-row { min-height: 68px; display: grid; grid-template-columns: 54px minmax(0, 1fr) 110px 80px 130px; align-items: center; gap: 14px; border-bottom: 1px solid var(--line); }
    .rank-number { color: var(--subtle); font-size: 20px; font-weight: 760; }
    .rank-row:nth-child(-n+3) .rank-number { color: var(--coral); }
    .rank-row strong { font-size: 14px; font-weight: 650; }
    .rank-meta { color: var(--muted); font-size: 12px; }
    .rank-score { color: var(--lime); font-size: 13px; font-weight: 700; }
    .rank-tag { justify-self: start; color: #cbd9d0; background: var(--panel-light); padding: 4px 8px; border-radius: 3px; font-size: 11px; }
    .member-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; }
    .member-main { min-height: 260px; padding: 30px; position: relative; overflow: hidden; background: var(--panel-light); border: 1px solid var(--line); }
    .member-main::after { content: "18+"; position: absolute; right: 22px; bottom: -40px; color: rgba(213,232,154,.09); font-size: 150px; font-weight: 850; line-height: 1; }
    .member-main h3 { max-width: 420px; margin: 0; font-size: 23px; }
    .member-main p { max-width: 520px; color: var(--muted); font-size: 14px; }
    .member-side { padding: 27px; background: var(--panel); border: 1px solid var(--line); }
    .member-side h3 { margin: 0 0 14px; font-size: 17px; }
    .member-side ul { margin: 0; padding: 0; list-style: none; }
    .member-side li { padding: 9px 0; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }
    .member-side li::before { content: "•"; color: var(--mint); margin-right: 9px; }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .news-card { overflow: hidden; background: var(--panel); border: 1px solid var(--line); }
    .news-card img { height: 160px; object-fit: cover; }
    .news-body { padding: 16px; }
    .news-body time { color: var(--mint); font-size: 11px; }
    .news-body h3 { margin: 8px 0; font-size: 15px; line-height: 1.5; }
    .news-body p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
    .assurance-strip { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
    .assurance { padding: 20px; border-right: 1px solid var(--line); }
    .assurance:last-child { border-right: 0; }
    .assurance strong { display: block; color: var(--mint); font-size: 14px; }
    .assurance span { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; }
    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 22px; border-left: 2px solid var(--coral); background: var(--panel); }
    .quote p { margin: 0; color: #dbe4de; font-size: 14px; line-height: 1.85; }
    .quote span { display: block; margin-top: 14px; color: var(--subtle); font-size: 11px; }
    .milestones { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
    .milestone { padding: 22px 20px 8px 0; position: relative; }
    .milestone::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--mint); }
    .milestone b { display: block; color: var(--mint); font-size: 13px; }
    .milestone p { color: var(--muted); font-size: 13px; line-height: 1.8; }
    .faq-list { border-top: 1px solid var(--line); }
    details { padding: 19px 0; border-bottom: 1px solid var(--line); }
    summary { display: flex; justify-content: space-between; gap: 20px; color: #e8eee9; cursor: pointer; font-size: 15px; font-weight: 650; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--mint); font-size: 20px; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: 12px 0 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
    .closing { background: var(--panel-light); border-top: 1px solid var(--line); }
    .closing-inner { display: flex; justify-content: space-between; align-items: center; gap: 28px; }
    .closing h2 { font-size: 25px; }
    .closing p { max-width: 700px; color: var(--muted); font-size: 14px; }
    .site-footer { padding: 48px 0 22px; background: #0d1515; }
    .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 34px; padding-bottom: 35px; }
    .footer-brand p { max-width: 340px; color: var(--muted); font-size: 12px; line-height: 1.9; }
    .footer-column h3 { margin: 0 0 13px; color: #e6ece7; font-size: 13px; }
    .footer-column a { display: block; width: fit-content; margin: 8px 0; color: var(--muted); font-size: 12px; }
    .footer-column a:hover { color: var(--mint); }
    .copyright { display: flex; justify-content: space-between; gap: 20px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 11px; }
    .legal-note { color: var(--muted); }
    @media (max-width: 1024px) {
      .nav-links { gap: 16px; }
      .nav-note { display: none; }
      .title-grid { grid-template-columns: repeat(3, 1fr); }
      .category-grid { grid-template-columns: repeat(2, 1fr); }
      .metric { padding: 21px; }
      .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .container { width: min(100% - 36px, var(--container)); }
      .nav { min-height: 68px; flex-wrap: wrap; gap: 0; padding-block: 11px; }
      .brand-name { font-size: 13px; }
      .brand-mark { width: 34px; height: 34px; }
      .nav-links { width: 100%; overflow-x: auto; gap: 23px; padding: 10px 0 2px; scrollbar-width: none; }
      .nav-links::-webkit-scrollbar { display: none; }
      .nav-links a { flex: 0 0 auto; font-size: 12px; }
      .hero { min-height: 570px; background-position: 58% center; }
      .hero-inner { padding-block: 64px; }
      .hero-copy { font-size: 14px; }
      main section { padding: 58px 0; }
      .section-head { align-items: start; flex-direction: column; gap: 13px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .story-grid, .split-feature { grid-template-columns: 1fr; gap: 25px; }
      .story-photo { height: 280px; }
      .split-feature img { height: 270px; }
      .title-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
      .rank-row { grid-template-columns: 38px minmax(0, 1fr) 65px 55px; gap: 8px; }
      .rank-row .rank-meta { display: none; }
      .rank-tag { font-size: 10px; }
      .news-grid { grid-template-columns: repeat(2, 1fr); }
      .news-card img { height: 135px; }
      .quotes { grid-template-columns: 1fr; }
      .assurance-strip { grid-template-columns: repeat(2, 1fr); }
      .assurance:nth-child(2) { border-right: 0; }
      .assurance:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .member-grid { grid-template-columns: 1fr; }
      .closing-inner { align-items: start; flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .container { width: calc(100% - 30px); }
      .hero { min-height: 590px; }
      .hero::before { background: linear-gradient(90deg, rgba(12,20,20,.94), rgba(12,20,20,.55)), linear-gradient(0deg, rgba(12,20,20,.62), transparent); }
      h1 { font-size: 38px; }
      .hero-subtitle { font-size: 17px; }
      .hero-checks { gap: 8px 14px; }
      .hero-actions { align-items: stretch; flex-direction: column; }
      .hero-actions .button { width: 100%; }
      h2 { font-size: 25px; }
      .section-intro { font-size: 13px; }
      .metric { min-height: 120px; padding: 17px; }
      .metric strong { font-size: 26px; }
      .category-grid { grid-template-columns: 1fr; }
      .category { min-height: 150px; }
      .feature-band { grid-template-columns: 1fr; padding: 23px; }
      .title-grid { gap: 10px; }
      .title-info { padding: 11px; }
      .title-info h3 { font-size: 12px; }
      .title-info p { font-size: 10px; }
      .poster { aspect-ratio: 1 / 1.1; }
      .benefit-list { grid-template-columns: 1fr; }
      .rank-row { grid-template-columns: 30px minmax(0, 1fr) 48px; }
      .rank-score { font-size: 12px; }
      .rank-tag { display: none; }
      .news-grid { grid-template-columns: 1fr; }
      .news-card { display: grid; grid-template-columns: 116px 1fr; }
      .news-card img { height: 100%; min-height: 125px; }
      .news-body { padding: 12px; }
      .news-body h3 { font-size: 13px; }
      .assurance { padding: 15px 12px; }
      .milestones { grid-template-columns: 1fr; gap: 12px; }
      .milestone { padding-left: 18px; }
      .milestone::before { top: 25px; }
      .member-main { padding: 23px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 25px 16px; }
      .footer-brand { grid-column: 1 / -1; }
      .copyright { flex-direction: column; gap: 6px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
    }