/* roulang page: index */
:root {
      --bg: #f6f8fc;
      --panel: #ffffff;
      --panel-soft: #f2f6fb;
      --line: #d9e4f0;
      --line-strong: #c2d3e5;
      --text: #17324d;
      --muted: #5f7186;
      --muted-2: #7d8ea3;
      --brand: #315f93;
      --brand-2: #244b77;
      --brand-soft: #eaf2fb;
      --accent: #6f9fcc;
      --shadow: 0 16px 38px rgba(25, 50, 82, 0.08);
      --shadow-strong: 0 20px 48px rgba(25, 50, 82, 0.12);
      --radius: 20px;
      --radius-sm: 14px;
      --radius-lg: 26px;
      --container: 1180px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(97, 143, 198, 0.10), transparent 28%),
        radial-gradient(circle at top right, rgba(189, 213, 236, 0.40), transparent 22%),
        linear-gradient(180deg, #fbfcfe 0%, #f6f8fc 100%);
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      display: block;
    }

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    .site-container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .nav-panel,
    .hero-panel,
    .soft-panel,
    .glassless-card {
      background: rgba(255, 255, 255, 0.94);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .nav-panel {
      border-radius: 24px;
      backdrop-filter: none;
    }

    .section-shell {
      padding: 24px 0;
    }

    .section-title {
      color: var(--text);
      letter-spacing: -0.02em;
    }

    .section-kicker {
      color: var(--brand);
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      font-size: 12px;
    }

    .hero-title {
      letter-spacing: -0.04em;
      line-height: 1.08;
    }

    .brand-mark {
      width: 46px;
      height: 46px;
      border-radius: 16px;
      background: linear-gradient(145deg, var(--brand), #4b7bb1);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 12px 24px rgba(49, 95, 147, 0.24);
      flex: 0 0 auto;
    }

    .nav-link {
      position: relative;
      border: 1px solid transparent;
      background: #f9fbfe;
      color: var(--muted);
      transition: all 0.24s ease;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
      color: var(--brand-2);
      background: #eff5fb;
      border-color: #cfe0f0;
      transform: translateY(-1px);
      box-shadow: 0 10px 24px rgba(25, 50, 82, 0.08);
    }

    .nav-link.active,
    .nav-link[aria-current="page"] {
      color: var(--brand-2);
      background: #e8f1fb;
      border-color: #bfd5eb;
      box-shadow: inset 0 0 0 1px rgba(49, 95, 147, 0.04);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 14px;
      border: 1px solid transparent;
      transition: all 0.24s ease;
      font-weight: 700;
      letter-spacing: 0.01em;
      outline: none;
      cursor: pointer;
      white-space: nowrap;
    }

    .btn:focus-visible,
    .nav-link:focus-visible,
    summary:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(59, 115, 176, 0.22);
      outline-offset: 2px;
    }

    .btn-primary {
      background: linear-gradient(180deg, var(--brand) 0%, var(--brand-2) 100%);
      color: #fff;
      box-shadow: 0 14px 28px rgba(49, 95, 147, 0.20);
    }

    .btn-primary:hover {
      background: linear-gradient(180deg, #3a6b9f 0%, #214365 100%);
      transform: translateY(-1px);
      box-shadow: 0 18px 30px rgba(49, 95, 147, 0.24);
    }

    .btn-secondary {
      background: #fff;
      border-color: #c8d8e8;
      color: var(--brand-2);
    }

    .btn-secondary:hover {
      background: #f4f8fc;
      border-color: #a9c0d7;
      transform: translateY(-1px);
    }

    .chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      border: 1px solid #d7e2ee;
      background: #f8fbfe;
      color: var(--muted);
      font-size: 13px;
      line-height: 1;
    }

    .card {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      transition: all 0.26s ease;
    }

    .card:hover {
      transform: translateY(-3px);
      border-color: #bcd0e3;
      box-shadow: var(--shadow-strong);
    }

    .card-soft {
      background: linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(246,249,253,.96) 100%);
    }

    .metric {
      border-radius: 18px;
      border: 1px solid #d7e4f0;
      background: linear-gradient(180deg, #ffffff 0%, #f6f9fc 100%);
      padding: 18px;
      box-shadow: 0 10px 24px rgba(25, 50, 82, 0.06);
    }

    .metric-number {
      font-size: clamp(28px, 3.2vw, 42px);
      line-height: 1;
      letter-spacing: -0.06em;
      color: var(--brand-2);
      font-weight: 800;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--brand-soft);
      color: var(--brand-2);
      font-size: 12px;
      font-weight: 700;
      border: 1px solid #d8e5f2;
    }

    .icon-box {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      background: #eef5fb;
      border: 1px solid #d7e4f0;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--brand);
      flex: 0 0 auto;
    }

    .dot-line {
      height: 1px;
      background: linear-gradient(90deg, transparent 0%, #d8e4ef 12%, #d8e4ef 88%, transparent 100%);
    }

    details.faq-item {
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: 0 10px 26px rgba(25, 50, 82, 0.06);
      overflow: hidden;
    }

    details.faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 18px 22px;
      font-weight: 700;
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    details.faq-item summary::-webkit-details-marker {
      display: none;
    }

    details.faq-item summary .chev {
      width: 36px;
      height: 36px;
      border-radius: 12px;
      background: #eff5fb;
      border: 1px solid #d6e2ee;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.24s ease;
      flex: 0 0 auto;
    }

    details.faq-item[open] summary .chev {
      transform: rotate(180deg);
    }

    details.faq-item .faq-body {
      padding: 0 22px 20px;
      color: var(--muted);
      border-top: 1px solid #e5edf5;
    }

    .footer-link {
      color: var(--muted);
      transition: color 0.22s ease, transform 0.22s ease;
    }

    .footer-link:hover,
    .footer-link:focus-visible {
      color: var(--brand-2);
      transform: translateX(2px);
    }

    .visual-grid {
      background:
        linear-gradient(180deg, rgba(237, 244, 251, 0.94) 0%, rgba(244, 248, 252, 0.94) 100%);
      border: 1px solid #d9e5f1;
      border-radius: 28px;
      overflow: hidden;
      box-shadow: var(--shadow);
    }

    .visual-bar {
      height: 10px;
      border-radius: 999px;
      background: linear-gradient(90deg, #d9e6f3 0%, #8db1d6 100%);
    }

    .visual-bar.alt {
      background: linear-gradient(90deg, #bfd4ea 0%, #4d7fb4 100%);
    }

    .mobile-panel {
      border-top: 1px solid #e2ebf3;
    }

    .search-fake {
      border: 1px solid #cfdae6;
      background: #fff;
      border-radius: 16px;
      padding: 12px 14px;
      color: var(--muted);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.9);
    }

    @media (max-width: 1024px) {
      .site-container {
        width: min(100% - 24px, var(--container));
      }
    }

    @media (max-width: 768px) {
      .section-shell {
        padding: 18px 0;
      }

      .nav-panel {
        border-radius: 22px;
      }

      details.faq-item summary,
      details.faq-item .faq-body {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    @media (max-width: 640px) {
      .btn {
        min-height: 44px;
        padding: 0 16px;
        width: 100%;
      }

      .mobile-stack > * {
        width: 100%;
      }
    }

    @media (max-width: 480px) {
      .brand-mark {
        width: 40px;
        height: 40px;
        border-radius: 14px;
      }
    }

/* roulang page: category1 */
:root{
      --bg:#f7f9fc;
      --surface:#ffffff;
      --surface-soft:#eef5fb;
      --surface-blue:#eaf3fb;
      --primary:#246fa8;
      --primary-dark:#165985;
      --primary-soft:#dfeefa;
      --accent:#33a6b8;
      --text:#152233;
      --muted:#627184;
      --weak:#8a99aa;
      --border:#dbe5ef;
      --border-strong:#bfd3e6;
      --shadow:0 18px 45px rgba(32, 82, 122, .10);
      --shadow-sm:0 10px 28px rgba(32, 82, 122, .08);
      --radius:20px;
      --radius-lg:28px;
      --container:1180px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(70,143,195,.13), transparent 30%),
        linear-gradient(180deg,#fbfdff 0%, var(--bg) 42%, #f2f6fa 100%);
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block}
    button,input,textarea{font:inherit}
    button{border:0;background:transparent;cursor:pointer}
    ::selection{background:#cfe7f7;color:#102235}

    .site-container{
      width:min(var(--container), calc(100% - 40px));
      margin-inline:auto;
    }
    .section{padding:72px 0}
    .section-tight{padding:48px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      border:1px solid var(--border);
      background:rgba(255,255,255,.82);
      color:var(--primary-dark);
      border-radius:999px;
      padding:.42rem .78rem;
      font-size:.82rem;
      font-weight:800;
      box-shadow:0 8px 20px rgba(36,111,168,.06);
    }
    .eyebrow::before{
      content:"";
      width:.45rem;
      height:.45rem;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(51,166,184,.13);
    }
    .section-title{
      font-size:clamp(1.85rem,3.3vw,2.8rem);
      line-height:1.18;
      letter-spacing:-.04em;
      font-weight:900;
      color:#102033;
    }
    .section-desc{
      margin-top:1rem;
      color:var(--muted);
      font-size:1.02rem;
      max-width:720px;
    }

    .card{
      background:rgba(255,255,255,.92);
      border:1px solid var(--border);
      border-radius:var(--radius);
      box-shadow:var(--shadow-sm);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
    }
    .card:hover{
      transform:translateY(-3px);
      border-color:#a9cce8;
      box-shadow:var(--shadow);
      background:#fff;
    }
    .soft-card{
      background:linear-gradient(180deg,#ffffff 0%,#f8fbfe 100%);
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.5rem;
      min-height:46px;
      padding:.78rem 1.15rem;
      border-radius:15px;
      font-weight:850;
      line-height:1;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
      outline:none;
      white-space:nowrap;
    }
    .btn:focus-visible,.nav-link:focus-visible,.footer-link:focus-visible,.tag:focus-visible,.mobile-toggle:focus-visible{
      outline:3px solid rgba(36,111,168,.28);
      outline-offset:3px;
    }
    .btn-primary{
      color:white;
      background:linear-gradient(180deg,var(--primary) 0%,var(--primary-dark) 100%);
      box-shadow:0 14px 28px rgba(36,111,168,.22);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(36,111,168,.28)}
    .btn-secondary{
      color:var(--primary-dark);
      background:#fff;
      border:1px solid var(--border-strong);
      box-shadow:0 10px 22px rgba(21,34,51,.06);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:#8dbce0;background:#f8fcff}

    .badge,.tag{
      display:inline-flex;
      align-items:center;
      gap:.38rem;
      border-radius:999px;
      border:1px solid var(--border);
      background:#f4f8fc;
      color:#37566e;
      padding:.4rem .68rem;
      font-size:.78rem;
      font-weight:800;
      transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
    }
    .tag:hover,.tag.active{
      background:var(--primary-soft);
      border-color:#a9cce8;
      color:var(--primary-dark);
      transform:translateY(-1px);
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      padding:16px 0;
      backdrop-filter:blur(14px);
      background:rgba(247,249,252,.76);
      border-bottom:1px solid rgba(219,229,239,.62);
    }
    .nav-shell{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:12px;
      border:1px solid var(--border);
      border-radius:26px;
      background:rgba(255,255,255,.92);
      box-shadow:0 16px 42px rgba(32,82,122,.10);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:42px;
      height:42px;
      flex:0 0 auto;
      border-radius:16px;
      color:white;
      background:linear-gradient(145deg,var(--primary),#3aa0bd);
      box-shadow:0 12px 24px rgba(36,111,168,.22);
    }
    .brand-title{
      font-size:15px;
      line-height:1.2;
      font-weight:950;
      letter-spacing:-.02em;
      max-width:250px;
    }
    .brand-sub{font-size:12px;color:var(--weak);font-weight:700;margin-top:2px}
    .nav-link{
      color:#40566c;
      background:#f7fafc;
      border:1px solid transparent;
      transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
    }
    .nav-link:hover{
      transform:translateY(-1px);
      background:#eef6fc;
      color:var(--primary-dark);
      border-color:#d0e2f1;
    }
    .nav-link.active{
      background:var(--primary-soft);
      color:var(--primary-dark);
      border-color:#b8d5ea;
      box-shadow:inset 0 -2px 0 rgba(36,111,168,.22);
    }
    .icon-box{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:white;
      color:var(--primary);
      border:1px solid #dce9f4;
    }
    .mobile-toggle{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:44px;
      height:44px;
      border-radius:16px;
      border:1px solid var(--border);
      background:#f8fbfe;
      color:var(--primary-dark);
    }
    .mobile-panel{
      display:none;
      margin-top:12px;
      padding:12px;
      border:1px solid var(--border);
      border-radius:22px;
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .mobile-panel.open{display:grid;gap:10px}
    .mobile-panel .nav-link{width:100%;justify-content:flex-start}

    .hero{
      padding:64px 0 42px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:34px;
      align-items:center;
    }
    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      color:var(--muted);
      font-size:.9rem;
      font-weight:700;
    }
    .breadcrumb a{color:var(--primary-dark)}
    .hero h1{
      margin-top:18px;
      font-size:clamp(2.15rem,4.6vw,4.65rem);
      line-height:1.04;
      letter-spacing:-.06em;
      font-weight:950;
      color:#0f2033;
    }
    .hero-lead{
      margin-top:22px;
      color:#52667a;
      font-size:clamp(1.02rem,1.4vw,1.18rem);
      max-width:720px;
    }
    .hero-actions{
      margin-top:28px;
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }
    .hero-panel{
      position:relative;
      padding:24px;
      overflow:hidden;
      min-height:420px;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:-90px -90px auto auto;
      width:240px;
      height:240px;
      border-radius:50%;
      background:rgba(51,166,184,.14);
    }
    .panel-top{
      position:relative;
      display:flex;
      justify-content:space-between;
      align-items:flex-start;
      gap:18px;
      margin-bottom:22px;
    }
    .visual-grid{
      position:relative;
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
    }
    .visual-tile{
      min-height:128px;
      padding:18px;
      border-radius:22px;
      border:1px solid #d9e7f2;
      background:linear-gradient(180deg,#fff,#f2f8fd);
      box-shadow:0 12px 28px rgba(32,82,122,.07);
    }
    .visual-tile:nth-child(2){margin-top:26px}
    .visual-tile:nth-child(3){grid-column:span 2;min-height:112px;background:linear-gradient(135deg,#edf7fd,#ffffff)}
    .tile-line{
      height:8px;
      border-radius:999px;
      background:#d6e6f2;
      margin-top:12px;
    }
    .tile-line.short{width:58%}
    .tile-line.mid{width:78%}
    .stat-strip{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin-top:26px;
    }
    .stat{
      padding:18px;
      border-radius:20px;
      border:1px solid var(--border);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .stat strong{
      display:block;
      font-size:1.5rem;
      line-height:1;
      color:var(--primary-dark);
      letter-spacing:-.03em;
    }
    .stat span{display:block;margin-top:8px;color:var(--muted);font-size:.88rem;font-weight:700}

    .tag-row{
      display:flex;
      gap:10px;
      overflow:auto;
      padding:4px 2px 12px;
      scrollbar-width:thin;
      scrollbar-color:#b9d3e8 transparent;
    }

    .issue-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:22px;
      align-items:stretch;
    }
    .issue-stack{
      display:grid;
      gap:16px;
    }
    .issue-item{
      display:grid;
      grid-template-columns:auto 1fr;
      gap:14px;
      padding:20px;
    }
    .num{
      width:38px;
      height:38px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:14px;
      color:var(--primary-dark);
      background:var(--primary-soft);
      font-weight:950;
    }

    .collection-grid{
      display:grid;
      grid-template-columns:repeat(12,1fr);
      gap:18px;
      margin-top:28px;
    }
    .collection-card{
      grid-column:span 4;
      padding:22px;
      min-height:230px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .collection-card.large{
      grid-column:span 8;
      min-height:250px;
      background:linear-gradient(135deg,#ffffff 0%,#eef7fd 100%);
    }
    .card-title{
      font-size:1.16rem;
      line-height:1.3;
      font-weight:900;
      letter-spacing:-.02em;
      color:#17283a;
    }
    .card-text{margin-top:10px;color:var(--muted);font-size:.95rem}
    .card-meta{
      margin-top:18px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      justify-content:space-between;
    }
    .entry-link{
      color:var(--primary-dark);
      font-weight:900;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .entry-link:hover{color:var(--primary)}

    .process{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      counter-reset:step;
    }
    .process-card{
      position:relative;
      padding:22px;
      overflow:hidden;
    }
    .process-card::after{
      counter-increment:step;
      content:"0" counter(step);
      position:absolute;
      right:18px;
      top:12px;
      color:rgba(36,111,168,.12);
      font-size:3.4rem;
      font-weight:950;
      line-height:1;
    }

    .data-band{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:22px;
      align-items:center;
      padding:30px;
      border-radius:30px;
      border:1px solid #cfe0ee;
      background:linear-gradient(135deg,#f8fcff 0%,#eaf4fb 100%);
      box-shadow:var(--shadow-sm);
    }
    .meter-list{display:grid;gap:14px}
    .meter{
      padding:16px;
      border-radius:18px;
      background:#fff;
      border:1px solid var(--border);
    }
    .meter-top{display:flex;justify-content:space-between;gap:14px;font-weight:850;color:#23394f}
    .bar{height:8px;border-radius:999px;background:#e7eef5;margin-top:12px;overflow:hidden}
    .bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),var(--accent))}

    .faq-wrap{display:grid;gap:14px;margin-top:28px}
    details{
      border:1px solid var(--border);
      background:#fff;
      border-radius:18px;
      box-shadow:0 10px 24px rgba(32,82,122,.06);
      overflow:hidden;
    }
    summary{
      list-style:none;
      padding:18px 20px;
      cursor:pointer;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      font-weight:900;
      color:#17283a;
    }
    summary::-webkit-details-marker{display:none}
    summary::after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:10px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      flex:0 0 auto;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-weight:950;
    }
    details[open] summary::after{content:"−"}
    details p{
      border-top:1px solid var(--border);
      padding:0 20px 18px;
      margin:0;
      color:var(--muted);
    }

    .cta-card{
      position:relative;
      overflow:hidden;
      padding:34px;
      border-radius:32px;
      border:1px solid #c9ddeb;
      background:
        radial-gradient(circle at 90% 10%, rgba(51,166,184,.14), transparent 25%),
        linear-gradient(135deg,#ffffff 0%,#eef6fc 100%);
      box-shadow:var(--shadow);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .cta-card h2{
      font-size:clamp(1.5rem,2.5vw,2.25rem);
      line-height:1.2;
      font-weight:950;
      letter-spacing:-.04em;
    }
    .cta-card p{margin-top:10px;color:var(--muted);max-width:690px}

    .footer-link{
      color:#53677a;
      font-weight:750;
      transition:color .2s ease, transform .2s ease;
    }
    .footer-link:hover{color:var(--primary-dark);transform:translateX(2px)}

    @media (max-width:1280px){
      :root{--container:1080px}
      .brand-title{max-width:220px}
    }
    @media (max-width:1024px){
      .site-header{position:relative}
      .hero-grid,.issue-grid,.data-band{grid-template-columns:1fr}
      .hero-panel{min-height:auto}
      .collection-card,.collection-card.large{grid-column:span 6}
      .process{grid-template-columns:repeat(2,1fr)}
      .stat-strip{grid-template-columns:repeat(3,1fr)}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px, var(--container))}
      .section{padding:54px 0}
      .nav-shell{border-radius:22px}
      .brand-title{font-size:14px;max-width:190px}
      .brand-sub{display:none}
      .hero{padding:42px 0 28px}
      .hero-actions .btn,.cta-card .btn{width:100%}
      .stat-strip{grid-template-columns:1fr}
      .visual-grid{grid-template-columns:1fr}
      .visual-tile:nth-child(2){margin-top:0}
      .visual-tile:nth-child(3){grid-column:auto}
      .collection-card,.collection-card.large{grid-column:span 12}
      .cta-card{display:block;padding:26px}
      .cta-card .btn{margin-top:20px}
    }
    @media (max-width:640px){
      .process{grid-template-columns:1fr}
      .section-title{letter-spacing:-.03em}
      .hero h1{letter-spacing:-.045em}
      .panel-top{display:block}
      .panel-top .badge{margin-top:12px}
      .issue-item{grid-template-columns:1fr}
    }
    @media (max-width:480px){
      .brand-mark{width:38px;height:38px;border-radius:14px}
      .brand-title{max-width:155px;font-size:13px}
      .nav-shell{padding:10px}
      .hero h1{font-size:2rem}
      .btn{min-height:44px;padding:.72rem 1rem}
      .card,.soft-card{border-radius:18px}
      .cta-card{border-radius:24px}
    }

/* roulang page: category2 */
:root{
      --bg:#f7f9fc;
      --bg-soft:#eef4fa;
      --surface:#ffffff;
      --surface-2:#f4f8fc;
      --primary:#2f6fbd;
      --primary-strong:#1f5fa8;
      --primary-soft:#e7f0fb;
      --cyan-soft:#e8f7fb;
      --text:#162235;
      --muted:#607087;
      --weak:#8a98aa;
      --border:#dbe5ef;
      --border-strong:#c5d6e8;
      --shadow:0 16px 42px rgba(35,76,125,.10);
      --shadow-hover:0 22px 54px rgba(35,76,125,.16);
      --radius:20px;
      --radius-lg:28px;
      --focus:0 0 0 4px rgba(47,111,189,.18);
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 2%, rgba(47,111,189,.10), transparent 28%),
        radial-gradient(circle at 92% 18%, rgba(60,173,195,.10), transparent 24%),
        var(--bg);
      line-height:1.7;
      overflow-x:hidden;
    }

    a{color:inherit;text-decoration:none}
    img,svg{display:block}
    button,input,textarea{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:rgba(47,111,189,.18)}

    .site-container{
      width:min(1180px, calc(100% - 40px));
      margin-inline:auto;
    }

    .skip-link{
      position:absolute;
      left:16px;
      top:-60px;
      z-index:100;
      background:var(--primary);
      color:#fff;
      padding:10px 14px;
      border-radius:12px;
      transition:.2s ease;
    }
    .skip-link:focus{top:16px;outline:none;box-shadow:var(--focus)}

    .header-wrap{
      position:sticky;
      top:0;
      z-index:60;
      padding:16px 0;
      background:rgba(247,249,252,.88);
      backdrop-filter:saturate(140%) blur(12px);
      border-bottom:1px solid rgba(219,229,239,.65);
    }

    .nav-panel{
      border:1px solid var(--border);
      background:rgba(255,255,255,.94);
      box-shadow:0 12px 34px rgba(32,67,109,.09);
      border-radius:26px;
      padding:10px;
    }

    .brand-mark{
      width:42px;
      height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:16px;
      color:var(--primary);
      background:linear-gradient(145deg,#eaf3ff,#ffffff);
      border:1px solid #d7e5f4;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.9),0 8px 20px rgba(47,111,189,.12);
      flex:none;
    }

    .brand-title{
      max-width:310px;
      line-height:1.18;
      letter-spacing:-.02em;
    }

    .nav-link{
      color:#41536b;
      background:#f7fafd;
      border:1px solid transparent;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
    }
    .nav-link .icon-box{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      color:var(--primary);
      background:#eef5fd;
      border:1px solid #dbe9f7;
      transition:.2s ease;
    }
    .nav-link:hover{
      transform:translateY(-1px);
      color:var(--primary-strong);
      background:#fff;
      border-color:#cfe0f2;
      box-shadow:0 10px 24px rgba(47,111,189,.10);
    }
    .nav-link:hover .icon-box{background:var(--primary-soft)}
    .nav-link.active{
      color:var(--primary-strong);
      background:var(--primary-soft);
      border-color:#bfdaef;
      box-shadow:inset 0 -2px 0 rgba(47,111,189,.35);
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:0 18px;
      border-radius:16px;
      font-weight:800;
      line-height:1;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
      user-select:none;
      white-space:nowrap;
    }
    .btn:focus-visible,.nav-link:focus-visible,.footer-link:focus-visible,.tag:focus-visible,.mobile-toggle:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
      outline:none;
      box-shadow:var(--focus);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(180deg,var(--primary),var(--primary-strong));
      box-shadow:0 12px 28px rgba(47,111,189,.22);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(47,111,189,.28)}
    .btn-secondary{
      color:var(--primary-strong);
      background:#fff;
      border:1px solid #c9dced;
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:#9fc1e4;background:#f6fbff}

    .mobile-toggle{
      width:44px;
      height:44px;
      border-radius:16px;
      color:var(--primary-strong);
      background:#f4f8fc;
      border:1px solid var(--border);
      display:inline-flex;
      align-items:center;
      justify-content:center;
      transition:.2s ease;
    }
    .mobile-toggle:hover{background:#fff;box-shadow:0 10px 20px rgba(47,111,189,.10)}

    .mobile-menu{
      display:none;
      margin-top:10px;
      padding:10px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
    }
    .mobile-menu.open{display:grid;gap:8px}

    .section{padding:72px 0}
    .section-tight{padding:46px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      color:var(--primary-strong);
      background:var(--primary-soft);
      border:1px solid #cfe0f2;
      font-size:13px;
      font-weight:800;
    }

    .hero-card{
      position:relative;
      overflow:hidden;
      border:1px solid var(--border);
      border-radius:34px;
      background:linear-gradient(135deg,#ffffff 0%,#f6faff 58%,#eef6fc 100%);
      box-shadow:var(--shadow);
    }
    .hero-card:before{
      content:"";
      position:absolute;
      inset:-120px auto auto -80px;
      width:280px;
      height:280px;
      border-radius:999px;
      background:rgba(47,111,189,.11);
      filter:blur(8px);
    }
    .hero-card:after{
      content:"";
      position:absolute;
      right:-80px;
      bottom:-110px;
      width:330px;
      height:330px;
      border-radius:999px;
      background:rgba(66,178,197,.10);
      filter:blur(10px);
    }
    .hero-content{position:relative;z-index:1}

    .crumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      color:var(--muted);
      font-size:14px;
    }
    .crumb a{font-weight:700;color:var(--primary-strong)}
    .crumb span{color:var(--weak)}

    .title-gradient{
      background:linear-gradient(90deg,#132238 0%,#235d9f 62%,#3586ab 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }

    .card{
      background:var(--surface);
      border:1px solid var(--border);
      border-radius:var(--radius);
      box-shadow:0 10px 28px rgba(35,76,125,.07);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
    }
    .card:hover{
      transform:translateY(-3px);
      border-color:#b9d3eb;
      box-shadow:var(--shadow-hover);
    }

    .soft-card{
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg,#fff,#f6f9fd);
      box-shadow:var(--shadow);
    }

    .tag{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      min-height:34px;
      padding:0 12px;
      border-radius:999px;
      color:#2d567d;
      background:#f0f6fc;
      border:1px solid #d7e6f4;
      font-size:13px;
      font-weight:800;
      transition:.2s ease;
      white-space:nowrap;
    }
    .tag:hover,.tag.active{
      color:var(--primary-strong);
      background:#e5f0fb;
      border-color:#bcd5ec;
      transform:translateY(-1px);
    }

    .metric{
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      padding:18px;
      box-shadow:0 10px 24px rgba(35,76,125,.06);
    }
    .metric strong{
      display:block;
      font-size:30px;
      line-height:1;
      letter-spacing:-.04em;
      color:var(--primary-strong);
    }

    .visual-board{
      min-height:420px;
      border-radius:30px;
      border:1px solid #cfe0ee;
      background:
        linear-gradient(135deg,rgba(255,255,255,.94),rgba(238,246,252,.92)),
        repeating-linear-gradient(90deg,rgba(47,111,189,.06) 0 1px,transparent 1px 42px);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.9),0 22px 48px rgba(35,76,125,.10);
      position:relative;
      overflow:hidden;
    }
    .visual-line{
      position:absolute;
      left:44px;
      right:44px;
      height:1px;
      background:#d8e5f1;
    }
    .visual-node{
      position:absolute;
      border-radius:22px;
      background:#fff;
      border:1px solid #d9e6f2;
      box-shadow:0 16px 32px rgba(47,111,189,.10);
      padding:18px;
    }
    .pulse-dot{
      width:12px;
      height:12px;
      border-radius:999px;
      background:var(--primary);
      box-shadow:0 0 0 8px rgba(47,111,189,.12);
    }

    .filter-band{
      overflow:auto;
      scrollbar-width:thin;
      scrollbar-color:#bfd4e9 transparent;
      padding-bottom:6px;
    }
    .filter-band::-webkit-scrollbar{height:6px}
    .filter-band::-webkit-scrollbar-thumb{background:#bfd4e9;border-radius:999px}

    .path-item{
      position:relative;
      padding-left:34px;
    }
    .path-item:before{
      content:"";
      position:absolute;
      left:10px;
      top:9px;
      bottom:-28px;
      width:1px;
      background:#d2e1ef;
    }
    .path-item:last-child:before{display:none}
    .path-item .dot{
      position:absolute;
      left:0;
      top:4px;
      width:20px;
      height:20px;
      border-radius:999px;
      border:5px solid #e5f0fb;
      background:var(--primary);
      box-shadow:0 8px 18px rgba(47,111,189,.18);
    }

    .list-card{
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:22px;
      align-items:center;
      padding:22px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:0 10px 28px rgba(35,76,125,.06);
      transition:.22s ease;
    }
    .list-card:hover{
      transform:translateX(4px);
      border-color:#b8d2eb;
      box-shadow:var(--shadow-hover);
    }

    .faq details{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      padding:0;
      overflow:hidden;
      box-shadow:0 8px 22px rgba(35,76,125,.05);
    }
    .faq details + details{margin-top:14px}
    .faq summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      font-weight:850;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      color:#223247;
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{
      content:"+";
      width:30px;
      height:30px;
      border-radius:999px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:var(--primary-soft);
      color:var(--primary-strong);
      font-weight:900;
      flex:none;
    }
    .faq details[open] summary:after{content:"−"}
    .faq .answer{
      border-top:1px solid var(--border);
      padding:16px 20px 20px;
      color:var(--muted);
      background:#fbfdff;
    }

    .cta-panel{
      border-radius:30px;
      border:1px solid #cbddeb;
      background:
        linear-gradient(135deg,#ffffff 0%,#eef6fc 100%);
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .cta-panel:before{
      content:"";
      position:absolute;
      right:-50px;
      top:-60px;
      width:220px;
      height:220px;
      border-radius:999px;
      background:rgba(47,111,189,.10);
    }

    .footer-link{
      color:#53657b;
      font-weight:700;
      transition:.2s ease;
      width:max-content;
      border-radius:10px;
    }
    .footer-link:hover{color:var(--primary-strong);transform:translateX(2px)}

    .form-field{
      width:100%;
      border:1px solid var(--border);
      background:#fff;
      border-radius:16px;
      padding:13px 14px;
      color:var(--text);
      transition:.2s ease;
    }
    .form-field::placeholder{color:#9aa7b7}
    .form-field:focus{border-color:#9fc1e4;background:#fbfdff}

    @media (max-width:1280px){
      .site-container{width:min(1120px, calc(100% - 36px))}
      .brand-title{max-width:280px}
    }
    @media (max-width:1024px){
      .section{padding:58px 0}
      .hero-card{border-radius:28px}
      .visual-board{min-height:360px}
      .list-card{grid-template-columns:1fr}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px, 720px)}
      .header-wrap{padding:10px 0}
      .nav-panel{border-radius:22px}
      .brand-title{max-width:210px;font-size:14px}
      .section{padding:46px 0}
      .section-tight{padding:34px 0}
      .hero-card{border-radius:24px}
      .metric strong{font-size:26px}
      .btn{width:100%;min-height:46px}
      .visual-board{min-height:310px}
      .visual-node{padding:14px;border-radius:18px}
    }
    @media (max-width:640px){
      .site-container{width:min(100% - 24px, 600px)}
      .crumb{font-size:13px}
      .tag{font-size:12px;min-height:32px}
      .card,.soft-card{border-radius:18px}
      .hero-card{border-radius:22px}
      .list-card{padding:18px;border-radius:20px}
      .faq summary{padding:16px}
      .faq .answer{padding:14px 16px 18px}
    }
    @media (max-width:480px){
      .brand-mark{width:38px;height:38px;border-radius:14px}
      .brand-title{max-width:170px}
      .nav-panel{padding:8px}
      .visual-board{min-height:270px}
      .visual-line{left:24px;right:24px}
      .visual-node{max-width:210px}
    }