/* roulang page: index */
:root{
      --brand:#2563eb;
      --brand-dark:#1d4ed8;
      --brand-soft:#eff6ff;
      --accent:#06b6d4;
      --text:#0f172a;
      --muted:#64748b;
      --weak:#94a3b8;
      --line:#dbe4f0;
      --surface:#ffffff;
      --bg:#f7fbff;
      --blue-bg:#eaf3ff;
      --radius-sm:12px;
      --radius:22px;
      --radius-lg:34px;
      --shadow:0 18px 50px rgba(15,23,42,.10);
      --shadow-card:0 12px 32px rgba(37,99,235,.12);
      --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 10% 0%, rgba(37,99,235,.10), transparent 26rem),
        radial-gradient(circle at 92% 12%, rgba(6,182,212,.12), transparent 24rem),
        linear-gradient(180deg,#f8fbff 0%,#ffffff 48%,#f6f9ff 100%);
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer;border:0}
    ::selection{background:rgba(37,99,235,.18)}
    .site-container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .skip-link{
      position:absolute;left:20px;top:-80px;background:var(--brand);color:#fff;padding:10px 14px;border-radius:12px;z-index:80;transition:.2s;
    }
    .skip-link:focus{top:16px;outline:3px solid rgba(37,99,235,.25)}
    .floating-header{
      position:sticky;top:16px;z-index:60;padding-top:16px;
    }
    .nav-shell{
      width:min(var(--container),calc(100% - 40px));
      margin:auto;
      border:1px solid rgba(219,228,240,.88);
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-radius:999px;
      box-shadow:0 16px 45px rgba(15,23,42,.08);
      transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
    }
    .nav-shell:hover{box-shadow:0 20px 55px rgba(15,23,42,.11);border-color:rgba(37,99,235,.18)}
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--brand),var(--accent));
      box-shadow:0 10px 24px rgba(37,99,235,.28);
    }
    .nav-link{
      position:relative;
      padding:10px 16px;
      border-radius:999px;
      color:#334155;
      font-weight:700;
      transition:all .2s ease;
    }
    .nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}
    .nav-link.active{background:#0f172a;color:#fff}
    .nav-cta{
      display:inline-flex;align-items:center;gap:8px;
      padding:11px 18px;border-radius:999px;
      color:#fff;font-weight:800;
      background:linear-gradient(135deg,var(--brand),var(--brand-dark));
      box-shadow:0 12px 24px rgba(37,99,235,.25);
      transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
    }
    .nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(37,99,235,.32);filter:saturate(1.08)}
    .nav-cta:focus,.btn:focus,.form-control:focus,.faq-button:focus{outline:3px solid rgba(37,99,235,.22);outline-offset:3px}
    .mobile-panel{
      display:none;
      border-top:1px solid var(--line);
      padding:12px;
      margin-top:8px;
      background:#fff;
      border-radius:24px;
    }
    .mobile-panel.open{display:block}
    .hamburger{
      width:42px;height:42px;border-radius:14px;
      background:#f1f5f9;color:#0f172a;
      display:none;place-items:center;
      transition:.2s;
    }
    .hamburger:hover{background:#e2e8f0}
    .hero{
      padding:74px 0 42px;
    }
    .hero-panel{
      overflow:hidden;
      position:relative;
      border:1px solid rgba(219,228,240,.9);
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg,rgba(255,255,255,.96),rgba(239,246,255,.92)),
        radial-gradient(circle at 80% 12%,rgba(6,182,212,.18),transparent 28rem);
      box-shadow:var(--shadow);
    }
    .hero-panel:before{
      content:"";
      position:absolute;inset:auto -10% -42% 48%;
      height:420px;border-radius:999px;
      background:linear-gradient(135deg,rgba(37,99,235,.14),rgba(6,182,212,.14));
      filter:blur(8px);
      transform:rotate(-8deg);
    }
    .section{padding:72px 0}
    .section-sm{padding:52px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;
      border:1px solid rgba(37,99,235,.16);
      border-radius:999px;
      background:#fff;
      color:var(--brand-dark);
      font-size:14px;
      font-weight:800;
      box-shadow:0 8px 22px rgba(37,99,235,.08);
    }
    .eyebrow-dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 5px rgba(34,197,94,.12)}
    .headline{
      letter-spacing:-.04em;
      line-height:1.08;
    }
    .lead{color:#475569;font-size:18px;line-height:1.9}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      border-radius:999px;
      padding:13px 20px;
      min-height:48px;
      font-weight:850;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
      user-select:none;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--brand),#1e40af);
      box-shadow:0 16px 32px rgba(37,99,235,.24);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px rgba(37,99,235,.34)}
    .btn-secondary{
      color:#1d4ed8;
      background:#fff;
      border:1px solid rgba(37,99,235,.18);
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .btn-secondary:hover{background:var(--brand-soft);transform:translateY(-2px);border-color:rgba(37,99,235,.34)}
    .btn-dark{
      background:#0f172a;color:#fff;box-shadow:0 14px 28px rgba(15,23,42,.18);
    }
    .btn-dark:hover{transform:translateY(-2px);background:#111827}
    .form-card{
      border:1px solid rgba(219,228,240,.92);
      border-radius:26px;
      background:rgba(255,255,255,.92);
      box-shadow:0 18px 42px rgba(15,23,42,.08);
    }
    .form-control{
      width:100%;
      border:1px solid var(--line);
      background:#f8fafc;
      border-radius:16px;
      padding:14px 15px;
      color:var(--text);
      transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .form-control:hover{border-color:#bfdbfe}
    .form-control:focus{background:#fff;border-color:var(--brand)}
    .stat-pill{
      display:flex;align-items:center;gap:10px;
      padding:10px 13px;
      border-radius:999px;
      background:#fff;
      border:1px solid rgba(219,228,240,.9);
      box-shadow:0 8px 18px rgba(15,23,42,.05);
      color:#334155;
      font-weight:700;
      white-space:nowrap;
    }
    .card{
      border:1px solid rgba(219,228,240,.9);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:0 10px 28px rgba(15,23,42,.06);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow-card);border-color:rgba(37,99,235,.22)}
    .soft-card{
      border-radius:var(--radius);
      background:linear-gradient(180deg,#ffffff,#f8fbff);
      border:1px solid rgba(219,228,240,.9);
    }
    .badge{
      display:inline-flex;align-items:center;gap:6px;
      padding:6px 10px;border-radius:999px;
      font-size:13px;font-weight:800;
      background:#eff6ff;color:#1d4ed8;
      border:1px solid rgba(37,99,235,.14);
    }
    .pain-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:26px;
      align-items:stretch;
    }
    .screen-stage{
      border-radius:30px;
      padding:18px;
      background:#0f172a;
      box-shadow:0 24px 60px rgba(15,23,42,.20);
      border:1px solid rgba(255,255,255,.10);
    }
    .browser-bar{display:flex;align-items:center;gap:8px;padding:5px 3px 16px}
    .dot{width:11px;height:11px;border-radius:50%}
    .poster-track{
      display:flex;
      gap:18px;
      overflow-x:auto;
      padding:6px 4px 18px;
      scrollbar-width:thin;
      scrollbar-color:#bfdbfe transparent;
    }
    .poster-track::-webkit-scrollbar{height:8px}
    .poster-track::-webkit-scrollbar-thumb{background:#bfdbfe;border-radius:999px}
    .poster{
      min-width:180px;
      height:255px;
      position:relative;
      overflow:hidden;
      border-radius:24px;
      background:linear-gradient(145deg,#1d4ed8,#0f172a);
      box-shadow:0 16px 34px rgba(15,23,42,.16);
      transition:transform .22s ease,box-shadow .22s ease;
    }
    .poster:hover{transform:translateY(-6px) scale(1.015);box-shadow:0 24px 46px rgba(15,23,42,.22)}
    .poster:before{
      content:"";
      position:absolute;inset:0;
      background:
        radial-gradient(circle at 30% 20%,rgba(255,255,255,.34),transparent 28%),
        linear-gradient(180deg,transparent 35%,rgba(15,23,42,.88) 100%);
    }
    .poster-content{position:absolute;inset:auto 16px 16px;color:#fff}
    .poster-link{margin-top:10px;display:inline-flex;font-size:13px;font-weight:800;color:#dbeafe}
    .news-link{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:12px;
      align-items:center;
      padding:16px 0;
      border-bottom:1px solid var(--line);
      transition:color .2s ease,transform .2s ease;
    }
    .news-link:hover{color:var(--brand-dark);transform:translateX(3px)}
    .news-index{
      width:34px;height:34px;border-radius:12px;
      display:grid;place-items:center;
      color:#1d4ed8;background:#eff6ff;
      font-weight:900;
    }
    .faq-item{
      border:1px solid rgba(219,228,240,.95);
      border-radius:20px;
      background:#fff;
      overflow:hidden;
      box-shadow:0 8px 22px rgba(15,23,42,.04);
    }
    .faq-button{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:20px 22px;
      background:#fff;
      color:#0f172a;
      text-align:left;
      font-weight:900;
    }
    .faq-button:hover{background:#f8fafc}
    .faq-answer{display:none;padding:0 22px 22px;color:#64748b}
    .faq-item.open .faq-answer{display:block}
    .faq-icon{transition:transform .2s ease;color:#2563eb;font-weight:900}
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .cta-band{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      background:linear-gradient(135deg,#1d4ed8,#0f172a);
      color:#fff;
      box-shadow:0 26px 70px rgba(29,78,216,.26);
    }
    .cta-band:before{
      content:"";
      position:absolute;right:-90px;top:-110px;width:300px;height:300px;border-radius:50%;
      background:rgba(6,182,212,.32);
      filter:blur(4px);
    }
    .cta-band:after{
      content:"";
      position:absolute;left:8%;bottom:-130px;width:260px;height:260px;border-radius:50%;
      background:rgba(255,255,255,.10);
    }
    .footer{
      background:#08111f;
      color:#cbd5e1;
      padding:54px 0 26px;
    }
    .footer a{color:#e2e8f0;transition:color .2s ease}
    .footer a:hover{color:#93c5fd}
    .footer-logo{
      width:42px;height:42px;border-radius:16px;
      background:linear-gradient(135deg,#60a5fa,#22d3ee);
      color:#fff;
      display:grid;place-items:center;
      font-weight:900;
    }
    .divider{height:1px;background:rgba(226,232,240,.12);margin:30px 0 22px}
    .limit-strip{
      border:1px solid rgba(37,99,235,.16);
      background:linear-gradient(90deg,#eff6ff,#ffffff,#ecfeff);
      border-radius:22px;
      box-shadow:0 10px 26px rgba(37,99,235,.08);
    }
    .burst{
      display:inline-flex;align-items:center;justify-content:center;
      width:44px;height:44px;border-radius:16px;
      background:linear-gradient(135deg,#f97316,#ef4444);
      color:#fff;
      box-shadow:0 12px 28px rgba(249,115,22,.25);
      font-weight:900;
    }
    @media (max-width:1024px){
      .pain-grid{grid-template-columns:1fr}
      .hero{padding-top:54px}
      .section{padding:58px 0}
      .headline{letter-spacing:-.03em}
    }
    @media (max-width:768px){
      .site-container,.nav-shell{width:min(100% - 28px,var(--container))}
      .desktop-nav,.desktop-cta{display:none!important}
      .hamburger{display:grid}
      .nav-shell{border-radius:28px}
      .hero-panel{border-radius:28px}
      .hero{padding:34px 0 30px}
      .section{padding:48px 0}
      .lead{font-size:16px}
      .poster{min-width:154px;height:226px}
      .news-link{grid-template-columns:auto 1fr}
      .news-link span:last-child{grid-column:2;color:#94a3b8}
    }
    @media (max-width:520px){
      .site-container,.nav-shell{width:min(100% - 22px,var(--container))}
      .brand-mark,.footer-logo{width:38px;height:38px;border-radius:14px}
      .headline{font-size:40px!important}
      .btn{width:100%}
      .stat-pill{white-space:normal}
      .hero-panel{border-radius:24px}
      .form-card{border-radius:22px}
      .section{padding:42px 0}
      .cta-band{border-radius:26px}
    }