/* roulang page: index */
:root {
      --ink: #18212b;
      --muted: #6f7b88;
      --paper: #f7f8f6;
      --white: #ffffff;
      --line: #e5e9e5;
      --teal: #167c80;
      --teal-dark: #105e64;
      --coral: #eb735d;
      --gold: #c79845;
      --shadow: 0 18px 50px rgba(24, 33, 43, .09);
      --soft-shadow: 0 8px 25px rgba(24, 33, 43, .07);
      --radius: 18px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Noto Sans SC", "Manrope", sans-serif;
      line-height: 1.75;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    button, .btn { font: inherit; }
    .container { max-width: 1180px; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(247, 248, 246, .92);
      border-bottom: 1px solid rgba(229, 233, 229, .9);
      backdrop-filter: blur(16px);
    }
    .navbar { min-height: 78px; }
    .brand-mark {
      width: 38px;
      height: 38px;
      display: inline-grid;
      place-items: center;
      border-radius: 11px;
      color: var(--white);
      background: var(--teal);
      font-size: 17px;
      font-weight: 800;
      box-shadow: 0 7px 15px rgba(22, 124, 128, .23);
    }
    .brand-name { font-size: 17px; font-weight: 800; letter-spacing: .02em; }
    .nav-link {
      color: #63707b !important;
      font-size: 14px;
      font-weight: 600;
      margin: 0 7px;
      padding: 9px 11px !important;
      border-radius: 9px;
      transition: .2s ease;
    }
    .nav-link:hover, .nav-link.active { color: var(--teal) !important; background: #eaf4f1; }
    .nav-cta {
      color: var(--white);
      background: var(--ink);
      border-radius: 10px;
      padding: 10px 17px;
      font-size: 13px;
      font-weight: 700;
      transition: .2s ease;
    }
    .nav-cta:hover { color: var(--white); background: var(--teal); transform: translateY(-1px); }
    .hero {
      position: relative;
      overflow: hidden;
      min-height: 630px;
      display: flex;
      align-items: center;
      background: #173e43;
      color: var(--white);
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(15, 47, 52, .96) 0%, rgba(15, 47, 52, .78) 48%, rgba(15, 47, 52, .3) 100%), url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1900&q=90") center/cover;
    }
    .hero > .container { position: relative; z-index: 1; }
    .hero-copy { max-width: 690px; padding: 78px 0; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #b6ded8;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .08em;
    }
    .eyebrow::before {
      content: "";
      width: 27px;
      height: 2px;
      background: var(--coral);
    }
    h1 {
      margin: 20px 0 17px;
      font-size: clamp(38px, 5vw, 66px);
      line-height: 1.18;
      letter-spacing: -.035em;
      font-weight: 800;
    }
    h1 strong { color: #f3bd7d; font-weight: inherit; }
    .hero-lead { max-width: 625px; color: #d9e8e5; font-size: 17px; line-height: 1.9; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
    .btn-main, .btn-ghost {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      min-height: 48px;
      padding: 0 22px;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 700;
      transition: .2s ease;
    }
    .btn-main { color: #173e43; background: #f3bd7d; }
    .btn-main:hover { color: #173e43; background: #ffd19c; transform: translateY(-2px); }
    .btn-ghost { color: var(--white); border: 1px solid rgba(255,255,255,.4); }
    .btn-ghost:hover { color: var(--white); border-color: var(--white); background: rgba(255,255,255,.1); }
    .hero-data {
      display: flex;
      flex-wrap: wrap;
      gap: 28px;
      margin-top: 48px;
      padding-top: 23px;
      border-top: 1px solid rgba(255,255,255,.2);
    }
    .hero-data strong { display: block; color: #fff; font-size: 25px; line-height: 1.2; }
    .hero-data span { color: #b6ccc9; font-size: 12px; }
    section { padding: 92px 0; }
    .section-kicker { color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
    .section-title { margin: 7px 0 12px; font-size: clamp(27px, 3vw, 40px); line-height: 1.3; letter-spacing: -.025em; font-weight: 800; }
    .section-desc { max-width: 660px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
    .section-head { margin-bottom: 35px; }
    .section-head.row-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; }
    .text-link { color: var(--teal); font-size: 13px; font-weight: 700; white-space: nowrap; }
    .text-link:hover { color: var(--coral); }
    .metric-band { background: var(--white); border-bottom: 1px solid var(--line); padding: 28px 0; }
    .metric-item { padding: 5px 28px; border-right: 1px solid var(--line); }
    .metric-item:last-child { border: 0; }
    .metric-item strong { display: block; color: var(--teal); font-size: 28px; line-height: 1.3; }
    .metric-item span { color: var(--muted); font-size: 13px; }
    .feature-section { background: var(--white); }
    .feature-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; }
    .feature-panel {
      position: relative;
      min-height: 360px;
      overflow: hidden;
      border-radius: var(--radius);
      color: var(--white);
      background: #214e53;
      box-shadow: var(--shadow);
    }
    .feature-panel img { width: 100%; height: 100%; object-fit: cover; opacity: .72; }
    .feature-panel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(12, 36, 41, .88), transparent 65%); }
    .feature-content { position: absolute; z-index: 1; left: 28px; right: 28px; bottom: 25px; }
    .feature-content h3 { margin: 9px 0 5px; font-size: 25px; }
    .feature-content p { margin: 0; color: #d9e9e5; font-size: 13px; }
    .feature-side { display: grid; grid-template-rows: 1fr 1fr; gap: 24px; }
    .mini-feature { display: flex; align-items: center; gap: 18px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: #fbfcfa; transition: .2s ease; }
    .mini-feature:hover { border-color: #b7d9d3; box-shadow: var(--soft-shadow); transform: translateY(-3px); }
    .mini-feature img { width: 112px; height: 112px; object-fit: cover; border-radius: 12px; }
    .mini-feature h3 { margin: 0 0 6px; font-size: 17px; }
    .mini-feature p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
    .latest-section { background: #f1f4f1; }
    .content-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .content-card { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--white); box-shadow: 0 2px 0 rgba(24,33,43,.02); transition: .2s ease; }
    .content-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #c5ded9; }
    .thumb-wrap { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #dce7e4; }
    .thumb-wrap img { width: 100%; height: 100%; object-fit: cover; transition: .3s ease; }
    .content-card:hover .thumb-wrap img { transform: scale(1.04); }
    .badge { position: absolute; top: 11px; left: 11px; padding: 3px 8px; border-radius: 5px; color: #fff; background: var(--teal); font-size: 10px; font-weight: 800; letter-spacing: .04em; }
    .badge.coral { background: var(--coral); }
    .card-body { padding: 15px 16px 17px; }
    .card-body h3 { overflow: hidden; margin: 0 0 8px; font-size: 16px; line-height: 1.45; white-space: nowrap; text-overflow: ellipsis; }
    .card-meta { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 12px; }
    .rating { color: var(--gold); font-weight: 800; }
    .category-section { background: var(--white); }
    .category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .category-card { min-height: 175px; padding: 25px 22px; border: 1px solid var(--line); border-radius: 14px; background: #fbfcfa; transition: .2s ease; }
    .category-card:hover { background: #eff8f5; border-color: #b8dbd4; transform: translateY(-3px); }
    .category-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; color: var(--teal); background: #dcefeb; font-weight: 800; }
    .category-card h3 { margin: 17px 0 7px; font-size: 17px; }
    .category-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
    .ranking-section { background: #173e43; color: var(--white); }
    .ranking-section .section-kicker { color: #f3bd7d; }
    .ranking-section .section-desc { color: #bdd3d0; }
    .rank-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 55px; border-top: 1px solid rgba(255,255,255,.16); }
    .rank-item { display: grid; grid-template-columns: 35px 1fr auto auto; align-items: center; gap: 14px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
    .rank-no { color: #f3bd7d; font-size: 17px; font-weight: 800; }
    .rank-name { font-size: 14px; font-weight: 600; }
    .rank-tag { padding: 3px 7px; border: 1px solid rgba(255,255,255,.22); border-radius: 4px; color: #b8d4d0; font-size: 10px; }
    .rank-hot { color: #f3bd7d; font-size: 12px; }
    .news-section { background: var(--paper); }
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .news-item { display: flex; gap: 15px; padding: 15px; border: 1px solid var(--line); border-radius: 13px; background: var(--white); transition: .2s ease; }
    .news-item:hover { border-color: #b7d9d3; box-shadow: var(--soft-shadow); }
    .news-item img { width: 100px; height: 78px; object-fit: cover; border-radius: 9px; }
    .news-item h3 { margin: 0 0 7px; font-size: 14px; line-height: 1.55; }
    .news-item time { color: var(--muted); font-size: 11px; }
    .trust-band { background: #eaf2ef; }
    .trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .trust-item { padding: 23px; border-left: 3px solid var(--teal); background: var(--white); }
    .trust-item h3 { margin: 0 0 7px; font-size: 16px; }
    .trust-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
    .quote-section { background: var(--white); }
    .quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .quote-card { padding: 25px; border-radius: 14px; background: #f7f9f7; }
    .quote-mark { color: var(--coral); font-size: 28px; line-height: 1; }
    .quote-card p { margin: 12px 0 20px; color: #4e5b65; font-size: 14px; line-height: 1.85; }
    .quote-user { color: var(--ink); font-size: 12px; font-weight: 700; }
    .faq-section { background: #f1f4f1; }
    .accordion-item { margin-bottom: 10px; overflow: hidden; border: 1px solid var(--line) !important; border-radius: 10px !important; background: var(--white); }
    .accordion-button { padding: 18px 20px; color: var(--ink); background: var(--white); font-size: 14px; font-weight: 700; box-shadow: none !important; }
    .accordion-button:not(.collapsed) { color: var(--teal); background: #f5fbf9; }
    .accordion-body { padding: 0 20px 18px; color: var(--muted); font-size: 13px; line-height: 1.85; }
    .closing { padding: 75px 0; color: var(--white); background: var(--coral); }
    .closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
    .closing h2 { margin: 0 0 8px; font-size: 30px; }
    .closing p { margin: 0; color: #ffe9e2; font-size: 14px; }
    .closing .btn-main { color: var(--coral); background: var(--white); }
    .closing .btn-main:hover { color: var(--coral); background: #fff7f4; }
    footer { padding: 60px 0 25px; color: #bac7c4; background: #102f34; }
    .footer-brand { color: var(--white); font-size: 18px; font-weight: 800; }
    .footer-desc { max-width: 280px; margin: 15px 0 0; font-size: 12px; line-height: 1.8; }
    .footer-title { margin-bottom: 14px; color: #f3bd7d; font-size: 12px; font-weight: 800; }
    .footer-links { display: grid; gap: 8px; font-size: 12px; }
    .footer-links a:hover { color: var(--white); }
    .footer-bottom { margin-top: 42px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.13); color: #839b98; font-size: 11px; }
    :focus-visible { outline: 3px solid rgba(243,189,125,.75); outline-offset: 3px; }
    @media (max-width: 991px) {
      .navbar { min-height: 70px; }
      .nav-link { margin: 3px 0; }
      .nav-cta { display: inline-block; margin: 7px 0; }
      .hero { min-height: 580px; }
      .content-grid { grid-template-columns: repeat(3, 1fr); }
      .feature-grid { grid-template-columns: 1fr; }
      .feature-panel { min-height: 390px; }
      .category-grid { grid-template-columns: repeat(2, 1fr); }
      .news-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
      section { padding: 65px 0; }
      .hero-copy { padding: 65px 0; }
      .hero-lead { font-size: 15px; }
      .metric-item { padding: 5px 18px; }
      .metric-item strong { font-size: 22px; }
      .content-grid { grid-template-columns: repeat(2, 1fr); gap: 13px; }
      .rank-list { grid-template-columns: 1fr; }
      .trust-grid, .quote-grid { grid-template-columns: 1fr; }
      .section-head.row-head { align-items: start; flex-direction: column; }
      .closing-inner { align-items: start; flex-direction: column; }
    }
    @media (max-width: 520px) {
      h1 { font-size: 38px; }
      .hero-actions { display: grid; grid-template-columns: 1fr; }
      .hero-actions a { width: 100%; }
      .hero-data { gap: 18px; }
      .content-grid, .category-grid, .news-grid { grid-template-columns: 1fr; }
      .feature-side { gap: 13px; }
      .mini-feature { padding: 14px; }
      .mini-feature img { width: 88px; height: 88px; }
      .rank-item { grid-template-columns: 27px 1fr auto; gap: 9px; }
      .rank-hot { grid-column: 2 / 3; }
      .rank-tag { grid-column: 3 / 4; grid-row: 1; }
      .news-item img { width: 92px; }
    }