/* roulang page: index */
:root {
      --ink: #18232b;
      --muted: #6d7b80;
      --ocean: #0f7180;
      --ocean-deep: #09515e;
      --coral: #e46f52;
      --paper: #ffffff;
      --mist: #f3f7f5;
      --line: #dfe9e5;
      --soft-line: #edf3f0;
      --radius: 18px;
      --shadow: 0 18px 50px rgba(24,35,43,.10);
      --shadow-small: 0 8px 24px rgba(24,35,43,.08);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: #fbfdfc;
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    .container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
    .site-header {
      position: sticky; top: 0; z-index: 30;
      background: rgba(251,253,252,.92);
      border-bottom: 1px solid rgba(223,233,229,.9);
      backdrop-filter: blur(16px);
    }
    .nav-shell { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; white-space: nowrap; }
    .brand-mark {
      display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px;
      background: var(--ocean); color: white; font-size: 15px; box-shadow: 5px 5px 0 #cce3dc;
    }
    .nav-links { display: flex; align-items: center; gap: 10px; }
    .nav-link { padding: 9px 17px; color: var(--muted); border-radius: 10px; transition: .2s ease; }
    .nav-link:hover, .nav-link.active { color: var(--ocean-deep); background: #e6f2ee; }
    .nav-action { padding: 10px 18px; color: white; background: var(--coral); border-radius: 10px; font-weight: 700; transition: .2s ease; }
    .nav-action:hover { background: #c95840; transform: translateY(-2px); }
    .menu-button { display: none; border: 1px solid var(--line); background: white; border-radius: 10px; padding: 8px 11px; }
    .hero { padding: 76px 0 68px; overflow: hidden; background: var(--mist); border-bottom: 1px solid var(--soft-line); }
    .hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 62px; }
    .eyebrow, .section-kicker {
      display: inline-flex; align-items: center; gap: 8px; color: var(--ocean); font-size: 13px;
      font-weight: 800; letter-spacing: .08em;
    }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { margin-bottom: 22px; font-size: clamp(38px, 5vw, 66px); line-height: 1.12; letter-spacing: -.03em; }
    .hero-copy { max-width: 650px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 25px; }
    .button-primary, .button-secondary {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px;
      padding: 0 22px; border-radius: 11px; font-weight: 800; transition: .2s ease;
    }
    .button-primary { color: white; background: var(--ocean); box-shadow: 0 8px 18px rgba(15,113,128,.18); }
    .button-primary:hover { background: var(--ocean-deep); transform: translateY(-2px); }
    .button-secondary { color: var(--ocean-deep); border: 1px solid #b8d4cc; background: white; }
    .button-secondary:hover { border-color: var(--ocean); background: #edf8f4; }
    .trust-row { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 13px; }
    .trust-row span { display: inline-flex; align-items: center; gap: 6px; }
    .trust-row b { color: var(--coral); font-size: 17px; }
    .hero-panel { position: relative; }
    .hero-panel:before { content: ""; position: absolute; right: -55px; top: -45px; width: 180px; height: 180px; border: 1px solid #cce3dc; border-radius: 50%; }
    .signal-board { position: relative; padding: 25px; border: 1px solid var(--line); border-radius: 22px; background: white; box-shadow: var(--shadow); }
    .board-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 20px; border-bottom: 1px solid var(--soft-line); }
    .board-label { color: var(--muted); font-size: 13px; }
    .status { display: inline-flex; align-items: center; gap: 6px; color: #38825f; font-size: 12px; }
    .status:before { content: ""; width: 7px; height: 7px; background: #4db67c; border-radius: 50%; }
    .metric-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 20px 0; }
    .metric { padding: 13px; border-radius: 12px; background: #f5f9f7; }
    .metric strong { display: block; font-size: 24px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 12px; }
    .signal-list { display: grid; gap: 10px; }
    .signal-item { display: flex; justify-content: space-between; gap: 12px; padding: 13px 0; border-top: 1px solid var(--soft-line); font-size: 14px; }
    .signal-item em { color: var(--coral); font-style: normal; white-space: nowrap; }
    .section { padding: 88px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 34px; }
    .section-head h2 { margin: 8px 0 0; font-size: clamp(28px, 3vw, 42px); line-height: 1.25; letter-spacing: -.02em; }
    .section-intro { max-width: 590px; margin: 0; color: var(--muted); }
    .calendar-wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
    .calendar-card { padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: var(--shadow-small); }
    .date-line { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
    .date-line strong { font-size: 22px; }
    .date-line span { color: var(--ocean); font-size: 13px; font-weight: 700; }
    .calendar-list { display: grid; gap: 0; }
    .calendar-list li { display: grid; grid-template-columns: 76px 1fr auto; align-items: center; gap: 16px; padding: 16px 0; border-top: 1px solid var(--soft-line); list-style: none; }
    .calendar-list ul { margin: 0; padding: 0; }
    .calendar-list time { color: var(--muted); font-size: 13px; }
    .calendar-list b { font-size: 15px; }
    .tag { display: inline-block; padding: 4px 9px; color: var(--ocean-deep); background: #e5f3ee; border-radius: 7px; font-size: 12px; white-space: nowrap; }
    .side-note { padding: 28px; color: white; border-radius: var(--radius); background: var(--ocean-deep); }
    .side-note h3 { margin-bottom: 12px; font-size: 24px; }
    .side-note p { color: #c7e2dc; font-size: 14px; }
    .side-note a { display: inline-flex; margin-top: 12px; color: #fff; font-weight: 700; border-bottom: 1px solid #8ecbc0; }
    .topic-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; }
    .topic-card { min-height: 220px; display: flex; flex-direction: column; justify-content: end; padding: 20px; border-radius: var(--radius); color: white; overflow: hidden; position: relative; background: #285b62; }
    .topic-card:nth-child(2) { background: #b55f4d; }
    .topic-card:nth-child(3) { background: #536c60; }
    .topic-card:nth-child(4) { background: #6a5966; }
    .topic-card:after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 25%, rgba(10,20,24,.72)); }
    .topic-card > * { position: relative; z-index: 1; }
    .topic-card .tag { width: fit-content; margin-bottom: auto; color: white; background: rgba(255,255,255,.18); }
    .topic-card h3 { margin: 0 0 5px; font-size: 21px; }
    .topic-card p { margin: 0; color: #e8f2ee; font-size: 13px; line-height: 1.6; }
    .dashboard { background: #182b31; color: white; }
    .dashboard .section-intro { color: #b4c8c5; }
    .dashboard-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 20px; }
    .dash-stat, .chart-box { padding: 27px; border: 1px solid rgba(210,237,229,.15); border-radius: var(--radius); background: rgba(255,255,255,.06); }
    .dash-stat h3 { color: #b4c8c5; font-size: 14px; font-weight: 500; }
    .big-number { margin: 14px 0 7px; font-size: 52px; line-height: 1; font-weight: 800; }
    .trend { color: #8dd3ae; font-size: 13px; }
    .bar-chart { display: flex; align-items: end; gap: 12px; height: 132px; margin-top: 23px; }
    .bar { flex: 1; min-width: 18px; height: var(--height); border-radius: 6px 6px 2px 2px; background: #55a99d; }
    .bar:nth-child(2n) { background: #e38b68; }
    .chart-legend { display: flex; justify-content: space-between; color: #b4c8c5; font-size: 12px; }
    .news-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 35px; }
    .news-list { margin: 0; padding: 0; }
    .news-list li { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--line); list-style: none; }
    .news-list a { font-weight: 700; transition: .2s; }
    .news-list a:hover { color: var(--coral); }
    .news-list time { color: var(--muted); font-size: 12px; white-space: nowrap; }
    .recommend { padding: 25px; border-left: 4px solid var(--coral); background: #fff5f0; }
    .recommend h3 { margin-bottom: 9px; font-size: 21px; }
    .recommend p { margin-bottom: 15px; color: var(--muted); font-size: 14px; }
    .guide-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .guide-card { padding: 25px; border-top: 3px solid var(--ocean); background: white; box-shadow: var(--shadow-small); }
    .guide-number { color: var(--coral); font-size: 14px; font-weight: 800; }
    .guide-card h3 { margin: 9px 0 7px; font-size: 19px; }
    .guide-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .faq-area { background: var(--mist); }
    .faq-list { max-width: 850px; margin: 0 auto; }
    details { border-bottom: 1px solid var(--line); }
    summary { display: flex; justify-content: space-between; gap: 20px; padding: 20px 0; cursor: pointer; font-weight: 800; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; color: var(--coral); font-size: 23px; line-height: 1; }
    details[open] summary:after { content: "−"; }
    details p { max-width: 760px; margin: -5px 0 20px; color: var(--muted); font-size: 14px; }
    .cta { padding: 70px 0; }
    .cta-box { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 36px 42px; border-radius: 22px; background: #e5f2ed; }
    .cta-box h2 { margin: 0 0 8px; font-size: 31px; }
    .cta-box p { margin: 0; color: var(--muted); }
    .site-footer { padding: 45px 0 25px; color: #bfd1cc; background: #182b31; }
    .footer-top { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 35px; }
    .footer-brand { color: white; }
    .footer-copy { max-width: 420px; margin: 13px 0 0; font-size: 13px; }
    .footer-links { display: flex; gap: 25px; color: #d7e4e0; font-size: 14px; }
    .footer-links a:hover { color: white; }
    .copyright { padding-top: 20px; border-top: 1px solid rgba(223,241,235,.14); font-size: 12px; }
    :focus-visible { outline: 3px solid rgba(228,111,82,.45); outline-offset: 3px; }
    @media (max-width: 900px) {
      .hero-grid, .calendar-wrap, .dashboard-grid, .news-grid { grid-template-columns: 1fr; }
      .topic-grid { grid-template-columns: repeat(2,1fr); }
      .hero-panel { max-width: 650px; }
    }
    @media (max-width: 700px) {
      .container { width: min(100% - 28px, 560px); }
      .nav-shell { height: 68px; }
      .menu-button { display: block; }
      .nav-links { display: none; position: absolute; top: 68px; left: 14px; right: 14px; padding: 10px; flex-direction: column; align-items: stretch; border: 1px solid var(--line); border-radius: 13px; background: white; box-shadow: var(--shadow-small); }
      .nav-links.open { display: flex; }
      .nav-action { text-align: center; }
      .hero { padding: 53px 0 50px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .section { padding: 62px 0; }
      .section-head { display: block; margin-bottom: 25px; }
      .section-intro { margin-top: 13px; font-size: 14px; }
      .topic-grid, .guide-grid { grid-template-columns: 1fr; }
      .topic-card { min-height: 180px; }
      .metric-row { gap: 7px; }
      .metric { padding: 10px 8px; }
      .metric strong { font-size: 20px; }
      .calendar-list li { grid-template-columns: 58px 1fr; }
      .calendar-list .tag { grid-column: 2; width: fit-content; }
      .cta-box { display: block; padding: 28px 24px; }
      .cta-box .button-primary { margin-top: 22px; width: 100%; }
      .footer-top { display: block; }
      .footer-links { margin-top: 25px; flex-wrap: wrap; }
    }
    @media (max-width: 420px) {
      .brand { font-size: 16px; }
      .brand-mark { width: 32px; height: 32px; }
      .hero-actions a { width: 100%; }
      .signal-board, .calendar-card, .side-note { padding: 20px; }
    }