/* roulang page: index */
:root {
      --bg: #f7fbfe;
      --surface: #ffffff;
      --surface-soft: #eef6fc;
      --surface-strong: #e6f2fa;
      --primary: #0f5f8a;
      --primary-dark: #0b4b6d;
      --primary-soft: #dff0fb;
      --text: #102033;
      --muted: #5f7186;
      --line: #dbe7f2;
      --shadow: 0 10px 28px rgba(14, 36, 63, 0.08);
      --shadow-strong: 0 16px 38px rgba(14, 36, 63, 0.12);
      --radius: 16px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      letter-spacing: 0;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font: inherit; }
    ::selection { background: rgba(15, 95, 138, 0.16); }

    section { scroll-margin-top: 96px; }

    .container-shell {
      width: min(1200px, calc(100% - 2rem));
      margin: 0 auto;
    }

    .panel {
      background: rgba(255, 255, 255, 0.96);
      border: 1px solid rgba(219, 231, 242, 0.9);
      box-shadow: var(--shadow);
      border-radius: var(--radius);
    }

    .panel-soft {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 252, 255, 0.98));
      border: 1px solid rgba(219, 231, 242, 0.85);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .hero-surface {
      position: relative;
      overflow: hidden;
      background:
        linear-gradient(180deg, rgba(247, 251, 254, 0.98), rgba(247, 251, 254, 0.95)),
        linear-gradient(135deg, rgba(15, 95, 138, 0.06), rgba(37, 99, 235, 0.03)),
        repeating-linear-gradient(90deg, rgba(148, 163, 184, 0.08) 0 1px, transparent 1px 28px),
        repeating-linear-gradient(0deg, rgba(148, 163, 184, 0.06) 0 1px, transparent 1px 28px);
    }

    .hero-surface::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.55) 18%, transparent 28%),
        linear-gradient(300deg, transparent 0%, rgba(15,95,138,0.04) 16%, transparent 28%);
      pointer-events: none;
    }

    .site-title {
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: 0;
      line-height: 1.1;
      color: var(--text);
    }

    .site-subtitle {
      font-size: 0.75rem;
      color: var(--muted);
      letter-spacing: 0;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.6rem 0.95rem;
      border-radius: 0.95rem;
      color: #334155;
      font-size: 0.92rem;
      font-weight: 600;
      transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }
    .nav-link:hover,
    .nav-link:focus-visible {
      background: rgba(223, 240, 251, 0.8);
      color: var(--primary-dark);
      outline: none;
      transform: translateY(-1px);
    }
    .nav-link.active {
      background: var(--primary-soft);
      color: var(--primary-dark);
      box-shadow: inset 0 0 0 1px rgba(15, 95, 138, 0.08);
    }

    .btn-primary,
    .btn-secondary,
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      border-radius: 0.9rem;
      padding: 0.9rem 1.2rem;
      font-size: 0.95rem;
      font-weight: 700;
      line-height: 1;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: linear-gradient(180deg, #1180b1, var(--primary));
      color: #fff;
      box-shadow: 0 12px 24px rgba(15, 95, 138, 0.18);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible {
      background: linear-gradient(180deg, #0f6e99, var(--primary-dark));
      transform: translateY(-1px);
      box-shadow: var(--shadow-strong);
      outline: none;
    }
    .btn-secondary {
      background: #fff;
      color: var(--primary-dark);
      border-color: rgba(15, 95, 138, 0.16);
      box-shadow: var(--shadow);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible {
      border-color: rgba(15, 95, 138, 0.28);
      background: rgba(223, 240, 251, 0.52);
      transform: translateY(-1px);
      outline: none;
    }
    .btn-ghost {
      background: transparent;
      color: var(--primary-dark);
      border-color: rgba(15, 95, 138, 0.12);
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible {
      background: rgba(223, 240, 251, 0.52);
      transform: translateY(-1px);
      outline: none;
    }

    .kicker {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      padding: 0.42rem 0.8rem;
      border-radius: 999px;
      background: rgba(223, 240, 251, 0.85);
      color: var(--primary-dark);
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0;
    }

    .chip {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.42rem 0.75rem;
      border-radius: 999px;
      border: 1px solid rgba(15, 95, 138, 0.12);
      background: #fff;
      color: #35556f;
      font-size: 0.78rem;
      font-weight: 600;
      line-height: 1;
    }

    .stat-box {
      background: rgba(255, 255, 255, 0.92);
      border: 1px solid rgba(219, 231, 242, 0.9);
      border-radius: 1rem;
      box-shadow: 0 10px 24px rgba(14, 36, 63, 0.06);
    }

    .section-title {
      font-size: clamp(1.35rem, 1.15rem + 0.7vw, 2rem);
      line-height: 1.18;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: 0;
    }

    .section-subtitle {
      color: var(--muted);
      font-size: 0.98rem;
      max-width: 70ch;
    }

    .card {
      background: rgba(255, 255, 255, 0.96);
      border: 1px solid rgba(219, 231, 242, 0.9);
      border-radius: 1rem;
      box-shadow: var(--shadow);
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-strong);
      border-color: rgba(15, 95, 138, 0.18);
    }

    .news-link {
      display: grid;
      gap: 0.35rem;
      padding: 0.95rem 1rem;
      border-radius: 1rem;
      border: 1px solid rgba(219, 231, 242, 0.9);
      background: rgba(255, 255, 255, 0.94);
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .news-link:hover,
    .news-link:focus-visible {
      transform: translateY(-1px);
      border-color: rgba(15, 95, 138, 0.18);
      box-shadow: var(--shadow);
      outline: none;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.38rem 0.7rem;
      border-radius: 999px;
      background: #eef7fd;
      color: var(--primary-dark);
      font-size: 0.76rem;
      font-weight: 700;
      line-height: 1;
    }

    .soft-list li {
      position: relative;
      padding-left: 1.2rem;
    }
    .soft-list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.65rem;
      width: 0.42rem;
      height: 0.42rem;
      border-radius: 999px;
      background: var(--primary);
      box-shadow: 0 0 0 4px rgba(15, 95, 138, 0.09);
    }

    details.faq-item {
      background: rgba(255, 255, 255, 0.96);
      border: 1px solid rgba(219, 231, 242, 0.9);
      border-radius: 1rem;
      box-shadow: var(--shadow);
      overflow: hidden;
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }
    details.faq-item[open] {
      box-shadow: var(--shadow-strong);
    }
    details.faq-item summary {
      cursor: pointer;
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1rem 1.1rem;
      font-weight: 700;
      color: #0f172a;
    }
    details.faq-item summary::-webkit-details-marker { display: none; }
    details.faq-item summary .faq-arrow {
      flex: 0 0 auto;
      width: 1.15rem;
      height: 1.15rem;
      transition: transform 0.2s ease;
      color: var(--primary-dark);
    }
    details.faq-item[open] summary .faq-arrow {
      transform: rotate(180deg);
    }
    details.faq-item .faq-body {
      padding: 0 1.1rem 1.1rem;
      color: var(--muted);
    }

    .input-base {
      width: 100%;
      border-radius: 0.9rem;
      border: 1px solid rgba(203, 213, 225, 0.95);
      background: #fff;
      padding: 0.9rem 1rem;
      color: var(--text);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }
    .input-base:focus {
      border-color: rgba(15, 95, 138, 0.35);
      box-shadow: 0 0 0 4px rgba(15, 95, 138, 0.1);
      outline: none;
      background: #fff;
    }

    .footer-link {
      color: #475569;
      transition: color 0.2s ease;
    }
    .footer-link:hover,
    .footer-link:focus-visible {
      color: var(--primary-dark);
      outline: none;
    }

    .reveal {
      opacity: 0;
      transform: translateY(10px);
      animation: rise 0.6s ease forwards;
    }
    .delay-1 { animation-delay: 0.06s; }
    .delay-2 { animation-delay: 0.12s; }
    .delay-3 { animation-delay: 0.18s; }

    @keyframes rise {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 767px) {
      .mobile-stack {
        grid-template-columns: 1fr;
      }
      .mobile-tight {
        gap: 0.85rem;
      }
    }

/* roulang page: category1 */
:root{
      --bg: #f4f8fc;
      --bg-2: #eef5fb;
      --card: rgba(255,255,255,.92);
      --line: rgba(148,163,184,.24);
      --line-strong: rgba(88,113,143,.22);
      --text: #0f172a;
      --muted: #5b6b7d;
      --primary: #1177a8;
      --primary-deep: #0f5f8a;
      --primary-soft: #e8f3fb;
      --accent: #dff3f7;
      --shadow-soft: 0 18px 40px rgba(15, 23, 42, .08);
      --shadow-hover: 0 22px 52px rgba(15, 23, 42, .12);
      --radius: 1.25rem;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        linear-gradient(180deg, #f8fbfe 0%, #f4f8fc 100%);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height:1.6;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(15, 23, 42, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.025) 1px, transparent 1px);
      background-size: 56px 56px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.12) 48%, transparent 100%);
      opacity:.9;
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(17,119,168,.16)}
    .container-shell{
      width:min(1180px, calc(100% - 2rem));
      margin-inline:auto;
    }
    .panel{
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      backdrop-filter: blur(10px);
    }
    .shadow-soft{box-shadow:var(--shadow-soft)}
    .nav-link{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.72rem 1rem;
      border-radius:.95rem;
      color:#607086;
      font-size:.95rem;
      font-weight:700;
      transition:transform .2s ease, background-color .2s ease, color .2s ease, box-shadow .2s ease, border-color .2s ease;
      border:1px solid transparent;
      white-space:nowrap;
    }
    .nav-link:hover{
      background:#edf6fc;
      color:#0f172a;
      transform:translateY(-1px);
      border-color:rgba(17,119,168,.14);
    }
    .nav-link.active{
      color:#fff;
      background:linear-gradient(180deg, var(--primary), var(--primary-deep));
      box-shadow:0 10px 22px rgba(17,119,168,.22);
    }
    .nav-link:focus-visible,
    .footer-link:focus-visible,
    .btn-focus:focus-visible{
      outline:2px solid rgba(17,119,168,.4);
      outline-offset:2px;
    }
    .footer-link{
      transition:color .2s ease, transform .2s ease, opacity .2s ease;
    }
    .footer-link:hover{
      color:var(--primary);
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.28);
      background:#f8fbfe;
      padding:.46rem .78rem;
      color:#506174;
      font-size:.85rem;
      font-weight:600;
      white-space:nowrap;
    }
    .section-kicker{
      color:var(--primary);
      font-size:.88rem;
      font-weight:800;
      letter-spacing:0;
    }
    .section-title{
      color:#0f172a;
      font-size:clamp(1.55rem, 2vw, 2.2rem);
      line-height:1.2;
      font-weight:800;
      letter-spacing:0;
    }
    .section-copy{
      color:#5e6d7f;
      font-size:1rem;
      line-height:1.85;
    }
    .faq-item{
      border:1px solid var(--line);
      border-radius:1rem;
      background:#fff;
      box-shadow:0 10px 24px rgba(15, 23, 42, .05);
      overflow:hidden;
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .input-field{
      width:100%;
      border:1px solid rgba(148,163,184,.34);
      background:#fff;
      border-radius:.95rem;
      padding:.9rem 1rem;
      color:#0f172a;
      transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
    .input-field::placeholder{color:#93a0b2}
    .input-field:focus{
      outline:none;
      border-color:rgba(17,119,168,.55);
      box-shadow:0 0 0 4px rgba(17,119,168,.12);
    }
    .soft-divider{border-top:1px solid rgba(148,163,184,.22)}
    @media (max-width: 768px){
      .container-shell{width:min(100% - 1.25rem, 1180px);}
      .nav-link{padding:.62rem .84rem;font-size:.9rem}
    }