/* roulang page: index */
:root{
      --bg:#eff4f9;
      --panel:#ffffff;
      --panel-soft:#f7faff;
      --line:#d8e2ee;
      --line-strong:#c7d4e4;
      --text:#172233;
      --muted:#5d6d84;
      --subtle:#7c8ca3;
      --primary:#1f68db;
      --primary-strong:#154fad;
      --primary-soft:#d9e8ff;
      --accent:#19a3c6;
      --accent-soft:#d8f2f9;
      --warm:#f0b23a;
      --success:#2e9c67;
      --shadow:0 16px 40px rgba(23,34,51,.08);
      --shadow-soft:0 8px 22px rgba(23,34,51,.06);
      --radius:8px;
      --radius-sm:6px;
      --space:24px;
      --space-lg:40px;
      --max:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:var(--bg);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.68;
      letter-spacing:0;
      padding-bottom:110px;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }

    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit;color:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(31,104,219,.22);outline-offset:2px}

    .site-shell{min-height:100vh}
    .grid-container{max-width:var(--max)}

    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      padding:14px 0 10px;
      transition:box-shadow .2s ease, transform .2s ease, background-color .2s ease;
    }
    .site-header.is-scrolled{
      background:rgba(239,244,249,.92);
      backdrop-filter:saturate(140%) blur(8px);
      box-shadow:0 10px 24px rgba(23,34,51,.06);
    }

    .header-pill{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:12px 14px;
      border:1px solid rgba(216,226,238,.94);
      border-radius:999px;
      background:rgba(255,255,255,.88);
      box-shadow:var(--shadow-soft);
    }

    .brand{
      display:inline-flex;
      align-items:center;
      gap:10px;
      min-width:0;
      flex:0 0 auto;
      font-weight:800;
      letter-spacing:0;
      color:var(--text);
      white-space:nowrap;
    }
    .brand-mark{
      width:32px;height:32px;
      border-radius:10px;
      background:linear-gradient(180deg,var(--primary),var(--primary-strong));
      box-shadow:0 8px 18px rgba(31,104,219,.25);
      position:relative;
      flex:0 0 auto;
    }
    .brand-mark::before,
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:auto;
      background:#fff;
      border-radius:999px;
    }
    .brand-mark::before{width:12px;height:3px;left:10px;top:11px}
    .brand-mark::after{width:16px;height:3px;left:8px;top:18px}

    .site-nav{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }
    .nav-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 16px;
      border-radius:999px;
      color:var(--muted);
      border:1px solid transparent;
      transition:background-color .16s ease, color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease;
      white-space:nowrap;
    }
    .nav-link:hover,
    .nav-link:focus-visible{
      color:var(--primary-strong);
      background:var(--primary-soft);
      border-color:rgba(31,104,219,.14);
      transform:translateY(-1px);
    }
    .nav-link.is-active{
      background:linear-gradient(180deg,rgba(31,104,219,.12),rgba(31,104,219,.08));
      color:var(--primary-strong);
      border-color:rgba(31,104,219,.18);
      box-shadow:inset 0 0 0 1px rgba(31,104,219,.05);
    }

    .menu-toggle{
      display:none;
      width:42px;height:42px;
      border:none;
      border-radius:999px;
      background:var(--panel-soft);
      color:var(--text);
      box-shadow:inset 0 0 0 1px rgba(216,226,238,.9);
      align-items:center;
      justify-content:center;
      transition:background-color .16s ease, transform .16s ease;
    }
    .menu-toggle:hover{background:#e7f0fb;transform:translateY(-1px)}
    .menu-toggle svg{width:20px;height:20px}

    .mobile-nav{
      display:none;
      margin-top:10px;
      padding:10px;
      border-radius:22px;
      border:1px solid rgba(216,226,238,.9);
      background:rgba(255,255,255,.94);
      box-shadow:var(--shadow-soft);
    }
    .mobile-nav.is-open{display:block}
    .mobile-nav .nav-link{
      display:block;
      width:100%;
      margin:0;
      text-align:center;
      border-radius:16px;
    }

    main{display:block}
    .section-band{
      padding:34px 0;
      position:relative;
    }
    .section-band + .section-band{border-top:1px solid rgba(216,226,238,.68)}
    .section-band.soft{background:linear-gradient(180deg,rgba(255,255,255,.56),rgba(255,255,255,.2))}
    .section-band.white{background:var(--panel)}
    .section-inner{position:relative}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:20px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:10px;
      font-size:12px;
      font-weight:700;
      color:var(--primary-strong);
      letter-spacing:0;
      text-transform:none;
    }
    .eyebrow::before{
      content:"";
      width:9px;height:9px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(25,163,198,.12);
      flex:0 0 auto;
    }
    h1,h2,h3,h4,p{margin:0}
    .section-head h2{
      font-size:clamp(22px,2.4vw,32px);
      line-height:1.2;
      letter-spacing:0;
      color:var(--text);
      margin-bottom:10px;
    }
    .section-lead{
      max-width:820px;
      color:var(--muted);
      font-size:15px;
    }

    .hero-band{
      padding-top:18px;
      overflow:hidden;
    }
    .hero-stage{
      position:relative;
      border-radius:24px;
      background:
        linear-gradient(180deg,rgba(255,255,255,.92),rgba(247,250,255,.96));
      border:1px solid rgba(216,226,238,.9);
      box-shadow:var(--shadow);
      padding:28px;
    }
    .hero-stage::before{
      content:"";
      position:absolute;
      inset:0;
      border-radius:24px;
      background-image:
        linear-gradient(rgba(31,104,219,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31,104,219,.04) 1px, transparent 1px);
      background-size:36px 36px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 120%);
      pointer-events:none;
    }
    .hero-copy{
      position:relative;
      z-index:1;
      padding:10px 6px;
    }
    .hero-copy .eyebrow{margin-bottom:14px}
    .hero-title{
      font-size:clamp(28px,3.2vw,48px);
      line-height:1.1;
      letter-spacing:0;
      font-weight:900;
      max-width:12em;
      margin-bottom:16px;
    }
    .hero-text{
      max-width:620px;
      color:var(--muted);
      font-size:16px;
      margin-bottom:20px;
    }

    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-bottom:18px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:0 18px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:700;
      transition:transform .16s ease, box-shadow .16s ease, background-color .16s ease, color .16s ease, border-color .16s ease;
      box-shadow:var(--shadow-soft);
      letter-spacing:0;
      white-space:nowrap;
    }
    .btn svg{width:16px;height:16px;flex:0 0 auto}
    .btn-primary{
      background:linear-gradient(180deg,var(--primary),var(--primary-strong));
      color:#fff;
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      color:#fff;
      transform:translateY(-1px);
      box-shadow:0 14px 24px rgba(31,104,219,.22);
    }
    .btn-secondary{
      background:#fff;
      color:var(--primary-strong);
      border-color:rgba(31,104,219,.16);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible{
      background:var(--primary-soft);
      transform:translateY(-1px);
    }
    .btn-ghost{
      background:transparent;
      color:var(--text);
      border-color:rgba(216,226,238,.96);
      box-shadow:none;
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible{
      background:#fff;
      border-color:rgba(31,104,219,.12);
      transform:translateY(-1px);
      box-shadow:var(--shadow-soft);
    }

    .keyword-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:8px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      min-height:32px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid rgba(216,226,238,.92);
      background:#fff;
      color:var(--muted);
      font-size:13px;
      font-weight:600;
    }
    .tag.blue{background:var(--primary-soft);color:var(--primary-strong);border-color:rgba(31,104,219,.14)}
    .tag.cyan{background:var(--accent-soft);color:#117a96;border-color:rgba(25,163,198,.14)}
    .tag.amber{background:#fff6df;color:#946400;border-color:rgba(240,178,58,.18)}

    .hero-flow{
      position:relative;
      z-index:1;
      display:grid;
      gap:12px;
      align-content:start;
      padding-top:4px;
    }
    .flow-card{
      background:var(--panel);
      border:1px solid rgba(216,226,238,.92);
      border-radius:18px;
      padding:18px;
      box-shadow:var(--shadow-soft);
      min-height:130px;
      transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    }
    .flow-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(31,104,219,.14)}
    .flow-card .mini-label{
      display:inline-flex;
      align-items:center;
      gap:6px;
      font-size:12px;
      font-weight:700;
      color:var(--primary-strong);
      margin-bottom:10px;
    }
    .flow-card h3{
      font-size:18px;
      line-height:1.25;
      margin-bottom:6px;
    }
    .flow-card p{
      color:var(--muted);
      font-size:14px;
    }
    .flow-stats{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:12px;
    }
    .stat-chip{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 10px;
      border-radius:999px;
      background:var(--panel-soft);
      color:var(--text);
      font-size:12px;
      font-weight:700;
    }
    .stat-chip strong{color:var(--primary-strong)}
    .progress-line{
      margin-top:12px;
      height:8px;
      border-radius:999px;
      background:#edf2f8;
      overflow:hidden;
      border:1px solid rgba(216,226,238,.8);
    }
    .progress-line span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--accent));
    }

    .snippet-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .snippet-card,
    .list-card,
    .matrix-card,
    .side-card,
    .news-card,
    .faq-item,
    .voice-chip,
    .cta-shell,
    .footer-panel{
      background:var(--panel);
      border:1px solid rgba(216,226,238,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .snippet-card{
      min-height:282px;
      padding:18px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    }
    .snippet-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(31,104,219,.16)}
    .snippet-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      margin-bottom:14px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:26px;
      padding:0 10px;
      border-radius:999px;
      font-size:12px;
      font-weight:700;
      letter-spacing:0;
      white-space:nowrap;
    }
    .badge.blue{background:var(--primary-soft);color:var(--primary-strong)}
    .badge.cyan{background:var(--accent-soft);color:#117a96}
    .badge.amber{background:#fff6df;color:#956600}
    .badge.green{background:#e5f5ea;color:#22764d}
    .badge.gray{background:#eef2f7;color:#59687d}
    .meta-mini{
      color:var(--subtle);
      font-size:12px;
      font-weight:600;
      white-space:nowrap;
    }
    .snippet-card h3{
      font-size:20px;
      line-height:1.25;
      margin-bottom:10px;
    }
    .snippet-card p{
      color:var(--muted);
      font-size:14px;
      min-height:42px;
    }
    .card-stats{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:12px;
      color:var(--muted);
      font-size:12px;
    }
    .card-stats span{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 10px;
      border-radius:999px;
      background:var(--panel-soft);
      border:1px solid rgba(216,226,238,.84);
    }
    .card-action{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-top:16px;
      color:var(--primary-strong);
      font-weight:700;
      font-size:14px;
      align-self:flex-end;
      transition:transform .16s ease, color .16s ease;
    }
    .card-action:hover{transform:translateX(2px);color:var(--primary)}

    .list-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
    }
    .list-card{
      min-height:220px;
      padding:18px;
      display:flex;
      flex-direction:column;
      gap:14px;
      transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    }
    .list-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(31,104,219,.14)}
    .list-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
    }
    .index-no{
      font-size:13px;
      font-weight:800;
      color:var(--primary-strong);
      background:var(--panel-soft);
      border:1px solid rgba(31,104,219,.12);
      min-width:42px;
      text-align:center;
      padding:5px 10px;
      border-radius:999px;
    }
    .list-card h3{
      font-size:18px;
      line-height:1.28;
    }
    .list-card p{
      color:var(--muted);
      font-size:14px;
      min-height:54px;
    }
    .track{
      height:8px;
      background:#edf2f8;
      border-radius:999px;
      overflow:hidden;
      border:1px solid rgba(216,226,238,.84);
    }
    .track span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--accent),var(--primary));
    }
    .list-foot{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      color:var(--subtle);
      font-size:12px;
      font-weight:600;
    }
    .dot{
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .dot::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 4px rgba(46,156,103,.12);
      flex:0 0 auto;
    }

    .matrix-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
      align-items:stretch;
    }
    .matrix-card{
      min-height:190px;
      padding:18px;
      transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    }
    .matrix-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(31,104,219,.14)}
    .matrix-card .icon-chip{
      width:42px;
      height:42px;
      border-radius:14px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:var(--panel-soft);
      color:var(--primary-strong);
      border:1px solid rgba(31,104,219,.12);
      font-weight:900;
      margin-bottom:12px;
    }
    .matrix-card h3{
      font-size:18px;
      line-height:1.28;
      margin-bottom:8px;
    }
    .matrix-card p{
      color:var(--muted);
      font-size:14px;
      min-height:48px;
    }

    .side-note{
      margin-top:16px;
      padding:16px;
      border-radius:18px;
      background:linear-gradient(180deg,#fff, #f7fbff);
      border:1px solid rgba(216,226,238,.92);
      box-shadow:var(--shadow-soft);
    }
    .side-note h3{
      font-size:16px;
      margin-bottom:10px;
    }
    .side-list{
      display:grid;
      gap:10px;
      color:var(--muted);
      font-size:14px;
    }
    .side-list li{
      list-style:none;
      display:flex;
      gap:10px;
      align-items:flex-start;
    }
    .side-list li::before{
      content:"";
      width:8px;height:8px;
      border-radius:50%;
      margin-top:8px;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(25,163,198,.12);
      flex:0 0 auto;
    }

    .news-layout{
      display:grid;
      grid-template-columns:1.4fr .9fr;
      gap:18px;
      align-items:start;
    }
    .news-list{
      background:var(--panel);
      border:1px solid rgba(216,226,238,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .news-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:16px 18px;
      border-top:1px solid rgba(216,226,238,.72);
      transition:background-color .16s ease;
    }
    .news-row:first-child{border-top:none}
    .news-row:hover{background:#f8fbff}
    .news-row a{
      font-weight:700;
      color:var(--text);
      line-height:1.4;
    }
    .news-row a:hover{color:var(--primary-strong)}
    .news-row small{
      flex:0 0 auto;
      color:var(--subtle);
      font-size:12px;
      white-space:nowrap;
    }
    .news-side{
      display:grid;
      gap:16px;
    }
    .news-card{
      padding:18px;
      min-height:132px;
    }
    .news-card h3{
      font-size:18px;
      line-height:1.28;
      margin-bottom:8px;
    }
    .news-card p{
      color:var(--muted);
      font-size:14px;
    }

    .voice-strip{
      display:flex;
      gap:12px;
      overflow-x:auto;
      padding-bottom:6px;
      scrollbar-width:thin;
      scrollbar-color:rgba(31,104,219,.45) transparent;
    }
    .voice-chip{
      min-width:240px;
      max-width:240px;
      padding:16px;
      flex:0 0 auto;
      min-height:138px;
      transition:transform .16s ease, box-shadow .16s ease;
    }
    .voice-chip:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .voice-score{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      margin-bottom:10px;
      color:var(--muted);
      font-size:12px;
      font-weight:700;
    }
    .stars{
      color:var(--warm);
      letter-spacing:0;
      font-size:14px;
    }
    .voice-chip p{
      color:var(--text);
      font-size:14px;
      line-height:1.65;
    }

    .faq-grid{
      display:grid;
      gap:12px;
    }
    .faq-item{
      overflow:hidden;
      transition:border-color .16s ease, box-shadow .16s ease;
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:18px 18px 16px;
      font-weight:800;
      color:var(--text);
      outline:none;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:50%;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:var(--panel-soft);
      color:var(--primary-strong);
      flex:0 0 auto;
      font-weight:800;
      transition:transform .16s ease;
    }
    .faq-item[open] summary::after{
      content:"–";
      transform:rotate(0deg);
    }
    .faq-body{
      padding:0 18px 18px;
      color:var(--muted);
      font-size:14px;
      max-width:920px;
    }

    .cta-shell{
      padding:24px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .cta-copy{
      max-width:760px;
    }
    .cta-copy h2{
      font-size:clamp(22px,2.3vw,30px);
      line-height:1.2;
      margin-bottom:10px;
    }
    .cta-copy p{
      color:var(--muted);
      font-size:15px;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:flex-end;
      flex:0 0 auto;
    }

    .bottom-cta{
      position:fixed;
      left:50%;
      bottom:16px;
      transform:translateX(-50%);
      width:min(var(--max),calc(100% - 24px));
      z-index:999;
      pointer-events:none;
    }
    .bottom-cta-inner{
      pointer-events:auto;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:14px 16px;
      border-radius:18px;
      border:1px solid rgba(216,226,238,.95);
      background:rgba(255,255,255,.94);
      box-shadow:0 18px 46px rgba(23,34,51,.12);
    }
    .bottom-cta-copy{
      display:flex;
      flex-direction:column;
      gap:2px;
      min-width:0;
    }
    .bottom-cta-copy strong{
      font-size:15px;
      color:var(--text);
    }
    .bottom-cta-copy span{
      font-size:13px;
      color:var(--muted);
    }
    .bottom-cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:flex-end;
    }

    .site-footer{
      padding:24px 0 34px;
    }
    .footer-panel{
      padding:22px;
    }
    .footer-top{
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:20px;
      padding-bottom:18px;
      border-bottom:1px solid rgba(216,226,238,.8);
    }
    .footer-brand{
      max-width:520px;
    }
    .footer-brand h2{
      font-size:18px;
      margin-bottom:8px;
    }
    .footer-brand p{
      color:var(--muted);
      font-size:14px;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .footer-links a{
      display:inline-flex;
      align-items:center;
      padding:8px 12px;
      border-radius:999px;
      background:var(--panel-soft);
      border:1px solid rgba(216,226,238,.84);
      color:var(--muted);
      font-size:13px;
      font-weight:700;
      transition:background-color .16s ease, color .16s ease, transform .16s ease;
    }
    .footer-links a:hover{
      background:var(--primary-soft);
      color:var(--primary-strong);
      transform:translateY(-1px);
    }
    .footer-bottom{
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:12px;
      padding-top:16px;
      color:var(--subtle);
      font-size:13px;
    }

    .section-anchor{scroll-margin-top:110px}

    @media (max-width: 64em){
      .snippet-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .list-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .matrix-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .news-layout{grid-template-columns:1fr}
      .cta-shell,.section-head,.bottom-cta-inner,.footer-top,.footer-bottom{flex-direction:column;align-items:flex-start}
      .cta-actions,.bottom-cta-actions{justify-content:flex-start}
      .hero-stage{padding:22px}
    }

    @media (max-width: 47.9375em){
      .site-header{padding:10px 0 8px}
      .header-pill{padding:10px 12px;border-radius:24px}
      .site-nav{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-nav{display:none}
      .hero-stage{border-radius:20px;padding:18px}
      .hero-stage::before{background-size:28px 28px}
      .hero-title{max-width:100%}
      .snippet-grid,
      .list-grid,
      .matrix-grid{grid-template-columns:1fr}
      .voice-chip{min-width:220px;max-width:220px}
      .bottom-cta{
        width:calc(100% - 14px);
        bottom:7px;
      }
      .bottom-cta-inner{
        padding:12px;
        border-radius:16px;
      }
      .cta-shell{padding:18px}
      .footer-panel{padding:18px}
    }

    @media (max-width: 31.25em){
      body{padding-bottom:132px}
      .hero-actions,.cta-actions,.bottom-cta-actions{width:100%}
      .btn{width:100%}
      .hero-text,.section-lead,.cta-copy p,.footer-brand p,.faq-body{font-size:14px}
      .section-band{padding:26px 0}
      .snippet-card,.list-card,.matrix-card,.news-card,.flow-card{border-radius:16px}
      .hero-copy{padding:0}
      .brand{white-space:normal}
      .brand-mark{width:28px;height:28px}
    }

/* roulang page: category1 */
:root{
  --bg:#f4f7fb;
  --surface:#ffffff;
  --surface-soft:#f8fbff;
  --surface-alt:#eef4fb;
  --ink:#1f2f43;
  --muted:#5c6f86;
  --muted-2:#7d8da3;
  --line:#d9e4f1;
  --line-strong:#c7d5e6;
  --accent:#2563eb;
  --accent-2:#0f8acb;
  --accent-soft:#e7f0ff;
  --success:#147d57;
  --warning:#b87912;
  --shadow:0 10px 28px rgba(24, 47, 86, 0.08);
  --shadow-2:0 16px 40px rgba(24, 47, 86, 0.12);
  --radius:8px;
  --pill:999px;
  --container:1180px;
}

*,
*::before,
*::after{box-sizing:border-box;}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  background:
    linear-gradient(180deg, rgba(244,247,251,.98), rgba(244,247,251,.98)),
    linear-gradient(90deg, rgba(255,255,255,.15) 0, rgba(255,255,255,.15) 100%);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  line-height:1.68;
  letter-spacing:0;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}

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

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

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

::selection{
  background:rgba(37,99,235,.16);
  color:var(--ink);
}

.grid-container{
  max-width:var(--container);
}

.site-header{
  position:sticky;
  top:0;
  z-index:60;
  backdrop-filter:saturate(180%) blur(12px);
  background:rgba(244,247,251,.82);
  border-bottom:1px solid rgba(217,228,241,.72);
}

.site-nav-shell{
  margin:14px 0 12px;
  padding:12px 14px;
  border:1px solid rgba(217,228,241,.9);
  border-radius:24px;
  background:rgba(255,255,255,.88);
  box-shadow:0 8px 28px rgba(26,42,74,.06);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  color:var(--ink);
  flex:0 0 auto;
}

.brand-mark-badge{
  width:28px;
  height:28px;
  border-radius:8px;
  background:linear-gradient(180deg, var(--accent), #1e4fd6);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 18px rgba(37,99,235,.22);
}

.brand-mark span{
  white-space:nowrap;
}

.site-nav{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.nav-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:999px;
  border:1px solid transparent;
  color:var(--muted);
  background:transparent;
  transition:transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
  white-space:nowrap;
}

.nav-link:hover,
.nav-link:focus-visible{
  color:var(--accent);
  background:var(--surface-soft);
  border-color:rgba(37,99,235,.14);
  transform:translateY(-1px);
  outline:none;
}

.nav-link.is-active{
  color:#fff;
  background:linear-gradient(180deg, var(--accent), #1d4ed8);
  border-color:transparent;
  box-shadow:0 10px 22px rgba(37,99,235,.22);
}

main{
  display:block;
}

.section-band{
  padding:26px 0;
}

.hero-band{
  padding:28px 0 16px;
}

.hero-panel{
  position:relative;
  overflow:hidden;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.98));
  border:1px solid rgba(217,228,241,.95);
  border-radius:16px;
  box-shadow:var(--shadow);
  padding:22px;
}

.hero-panel::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(135deg, rgba(37,99,235,.08) 0 18%, transparent 18% 70%, rgba(15,138,203,.05) 70% 100%),
    linear-gradient(90deg, rgba(37,99,235,.03), rgba(255,255,255,0));
  pointer-events:none;
}

.hero-panel > *{
  position:relative;
  z-index:1;
}

.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  border-radius:999px;
  background:var(--accent-soft);
  color:#1f4fbd;
  border:1px solid rgba(37,99,235,.12);
  font-size:.88rem;
  font-weight:700;
  margin-bottom:14px;
}

.hero-panel h1{
  margin:0;
  font-size:clamp(1.95rem, 3vw, 3.2rem);
  line-height:1.15;
  letter-spacing:0;
  color:var(--ink);
  font-weight:900;
  max-width:12ch;
}

.hero-lead{
  margin:14px 0 0;
  max-width:48rem;
  color:var(--muted);
  font-size:1.03rem;
}

.hero-actions{
  margin-top:18px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.button{
  border-radius:999px;
  border:1px solid transparent;
  padding:.86rem 1.25rem;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
  box-shadow:none;
}

.button:hover,
.button:focus-visible{
  transform:translateY(-1px);
  box-shadow:0 12px 22px rgba(20,39,77,.12);
  outline:none;
}

.primary-action{
  background:linear-gradient(180deg, var(--accent), #1e4fd6);
  color:#fff;
}

.primary-action:hover,
.primary-action:focus-visible{
  color:#fff;
}

.secondary-action{
  background:#fff;
  color:var(--accent);
  border-color:rgba(37,99,235,.18);
}

.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:16px;
}

.tag,
.pill,
.filter-chip,
.badge-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 11px;
  border-radius:999px;
  border:1px solid rgba(217,228,241,.95);
  background:#fff;
  color:var(--muted);
  font-size:.9rem;
  line-height:1;
}

.tag.is-accent,
.pill.is-accent,
.filter-chip.is-accent{
  background:var(--accent-soft);
  color:#1e4fb8;
  border-color:rgba(37,99,235,.14);
}

.hero-stack{
  display:grid;
  gap:12px;
}

.hero-stat,
.mini-panel,
.side-block,
.topic-card,
.stream-card,
.related-card,
.voice-chip,
.cta-panel,
.filter-shell,
.faq-item{
  border:1px solid rgba(217,228,241,.95);
  background:#fff;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.hero-stat{
  padding:16px;
}

.hero-stat .label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:8px;
  color:var(--muted);
  font-size:.9rem;
}

.hero-stat strong{
  display:block;
  font-size:1.45rem;
  line-height:1.1;
  color:var(--ink);
  margin-bottom:4px;
}

.hero-stat p{
  margin:0;
  color:var(--muted);
  font-size:.94rem;
}

.progress-line{
  height:6px;
  border-radius:999px;
  background:#edf3fb;
  overflow:hidden;
  margin-top:12px;
}

.progress-line span{
  display:block;
  height:100%;
  border-radius:inherit;
  background:linear-gradient(90deg, var(--accent), var(--accent-2));
}

.stream-band{
  padding:14px 0 18px;
}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:14px;
}

.section-head h2{
  margin:0;
  font-size:1.25rem;
  line-height:1.25;
  font-weight:800;
  color:var(--ink);
}

.section-head p{
  margin:0;
  color:var(--muted);
  max-width:48rem;
}

.stream-card{
  min-height:248px;
  padding:16px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  position:relative;
  overflow:hidden;
}

.stream-card::after{
  content:"";
  position:absolute;
  inset:auto -18% -32% auto;
  width:110px;
  height:110px;
  border-radius:14px;
  background:linear-gradient(180deg, rgba(37,99,235,.08), rgba(15,138,203,.02));
  transform:rotate(14deg);
  pointer-events:none;
}

.stream-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(37,99,235,.16);
}

.stream-card .topline,
.topic-card .topline{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}

.status-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 10px;
  border-radius:999px;
  background:#eff7ff;
  border:1px solid rgba(37,99,235,.13);
  color:#1f4fb8;
  font-size:.84rem;
  font-weight:700;
}

.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--success);
  box-shadow:0 0 0 4px rgba(20,125,87,.1);
}

.stream-card h3,
.topic-card h3,
.related-card h3{
  margin:0;
  color:var(--ink);
  font-size:1.03rem;
  line-height:1.35;
  font-weight:800;
}

.stream-card p,
.topic-card p,
.related-card p,
.side-block p,
.cta-panel p,
.faq-item p{
  color:var(--muted);
}

.stream-card p,
.topic-card p,
.related-card p{
  margin:10px 0 0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  min-height:3.4em;
}

.stream-meta,
.topic-meta,
.card-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  flex-wrap:wrap;
  margin-top:14px;
  color:var(--muted-2);
  font-size:.88rem;
}

.stream-action,
.card-action,
.inline-action{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--accent);
  font-weight:700;
}

.tools-band{
  padding:8px 0 18px;
}

.filter-shell{
  padding:16px;
}

.field-label{
  display:block;
  margin-bottom:8px;
  color:var(--muted);
  font-size:.93rem;
  font-weight:700;
}

.input-group{
  margin-bottom:0;
}

.input-group-field{
  height:48px;
  border-radius:8px 0 0 8px;
  border-color:var(--line-strong);
  box-shadow:none;
  background:#fff;
  color:var(--ink);
}

.input-group-field:focus{
  border-color:rgba(37,99,235,.5);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}

.input-group-button .button{
  height:48px;
  border-radius:0 8px 8px 0;
  margin:0;
}

.sort-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:flex-start;
  align-items:center;
}

.sort-label{
  color:var(--muted);
  font-size:.93rem;
  font-weight:700;
}

.filter-chip{
  cursor:pointer;
  background:#fff;
  transition:transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
}

.filter-chip:hover,
.filter-chip:focus-visible{
  transform:translateY(-1px);
  border-color:rgba(37,99,235,.2);
  background:var(--surface-soft);
  color:var(--accent);
  outline:none;
}

.tag-cloud{
  margin-top:14px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

.list-band{
  padding:16px 0 18px;
}

.topic-card{
  min-height:238px;
  padding:16px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.topic-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(37,99,235,.16);
}

.topic-card .rank{
  width:38px;
  height:38px;
  border-radius:8px;
  background:var(--accent-soft);
  color:#1e4fb8;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:900;
  flex:0 0 auto;
}

.topic-card .title-line{
  display:flex;
  align-items:flex-start;
  gap:10px;
}

.topic-card .title-line h3{
  margin-top:2px;
}

.topic-summary{
  margin:10px 0 0;
}

.topic-note{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  margin-top:12px;
  color:var(--muted-2);
  font-size:.88rem;
}

.metric{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 8px;
  border-radius:999px;
  background:#f8fbff;
  border:1px solid rgba(217,228,241,.9);
}

.topic-footer{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-top:14px;
}

.side-panel{
  position:sticky;
  top:106px;
  display:grid;
  gap:12px;
}

.side-block{
  padding:16px;
}

.side-block h3{
  margin:0 0 8px;
  font-size:1rem;
  font-weight:800;
  color:var(--ink);
}

.side-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:10px;
}

.side-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:var(--muted);
}

.side-list i{
  color:var(--accent);
  margin-top:4px;
}

.inline-stats{
  display:grid;
  gap:10px;
}

.inline-stat{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:11px 12px;
  border-radius:8px;
  background:#f8fbff;
  border:1px solid rgba(217,228,241,.9);
}

.inline-stat strong{
  color:var(--ink);
}

.inline-stat span{
  color:var(--muted);
  font-size:.9rem;
}

.voice-band{
  padding:16px 0 22px;
}

.voice-row{
  display:flex;
  gap:12px;
  overflow-x:auto;
  padding-bottom:6px;
  scroll-snap-type:x proximity;
}

.voice-chip{
  min-width:260px;
  max-width:260px;
  padding:14px;
  scroll-snap-align:start;
}

.voice-chip .stars{
  color:var(--warning);
  font-size:.9rem;
  margin-bottom:8px;
}

.voice-chip p{
  margin:0;
  color:var(--muted);
}

.voice-chip .author{
  margin-top:10px;
  color:var(--muted-2);
  font-size:.88rem;
}

.related-band{
  padding:8px 0 20px;
}

.related-card{
  min-height:178px;
  padding:16px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.related-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(37,99,235,.16);
}

.related-card .meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:12px;
}

.faq-band{
  padding:12px 0 22px;
}

.faq-list{
  display:grid;
  gap:10px;
}

.faq-item{
  overflow:hidden;
}

.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:16px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  color:var(--ink);
  font-weight:800;
}

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

.faq-item summary::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  color:var(--accent);
  transition:transform .18s ease;
  flex:0 0 auto;
}

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

.faq-item .faq-body{
  padding:0 18px 16px;
  color:var(--muted);
}

.cta-band{
  padding:12px 0 34px;
}

.cta-panel{
  padding:22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(244,249,255,.98));
}

.cta-panel h2{
  margin:0 0 8px;
  font-size:1.38rem;
  line-height:1.25;
  color:var(--ink);
  font-weight:900;
}

.cta-panel p{
  margin:0;
  max-width:50rem;
}

.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:flex-end;
  flex:0 0 auto;
}

.site-footer{
  padding:18px 0 28px;
}

.footer-panel{
  border:1px solid rgba(217,228,241,.95);
  background:#fff;
  border-radius:16px;
  box-shadow:var(--shadow);
  padding:18px 18px 16px;
}

.footer-top{
  display:flex;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}

.footer-brand h2{
  margin:0 0 8px;
  font-size:1.18rem;
  line-height:1.25;
  font-weight:900;
  color:var(--ink);
}

.footer-brand p{
  margin:0;
  max-width:46rem;
  color:var(--muted);
}

.footer-links{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:flex-start;
}

.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 12px;
  border-radius:999px;
  border:1px solid rgba(217,228,241,.95);
  background:var(--surface-soft);
  color:var(--muted);
  transition:transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible{
  transform:translateY(-1px);
  background:#fff;
  border-color:rgba(37,99,235,.2);
  color:var(--accent);
  outline:none;
}

.footer-bottom{
  margin-top:14px;
  padding-top:14px;
  border-top:1px solid rgba(217,228,241,.95);
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  color:var(--muted-2);
  font-size:.9rem;
}

@media screen and (max-width: 1024px){
  .site-nav-shell{
    padding:12px;
  }

  .hero-panel,
  .filter-shell,
  .cta-panel,
  .footer-panel{
    border-radius:14px;
  }

  .side-panel{
    position:static;
  }

  .cta-panel{
    align-items:flex-start;
    flex-direction:column;
  }
}

@media screen and (max-width: 768px){
  .site-nav-shell{
    align-items:flex-start;
    flex-direction:column;
  }

  .site-nav{
    width:100%;
    justify-content:flex-start;
    overflow-x:auto;
    padding-bottom:2px;
    -webkit-overflow-scrolling:touch;
  }

  .nav-link{
    flex:0 0 auto;
  }

  .hero-band{
    padding-top:20px;
  }

  .hero-panel{
    padding:18px;
  }

  .hero-panel h1{
    max-width:none;
  }

  .section-head{
    align-items:flex-start;
  }

  .section-head h2{
    font-size:1.12rem;
  }

  .stream-card,
  .topic-card,
  .related-card{
    min-height:auto;
  }

  .voice-chip{
    min-width:240px;
    max-width:240px;
  }

  .footer-top{
    flex-direction:column;
  }

  .footer-bottom{
    flex-direction:column;
  }
}

@media screen and (max-width: 520px){
  .hero-actions,
  .cta-actions{
    width:100%;
  }

  .button{
    width:100%;
    justify-content:center;
  }

  .input-group{
    display:block;
  }

  .input-group-field{
    border-radius:8px;
    margin-bottom:10px;
  }

  .input-group-button .button{
    width:100%;
    border-radius:8px;
  }

  .sort-row,
  .tag-cloud{
    overflow-x:auto;
    flex-wrap:nowrap;
    padding-bottom:4px;
  }

  .filter-chip,
  .tag,
  .pill{
    flex:0 0 auto;
  }

  .hero-panel h1{
    font-size:1.8rem;
  }

  .hero-lead{
    font-size:.98rem;
  }

  .topic-footer{
    flex-direction:column;
    align-items:flex-start;
  }

  .voice-chip{
    min-width:220px;
    max-width:220px;
  }

  .cta-panel{
    padding:18px;
  }
}