/* roulang page: index */
:root{
      --primary:#1d4ed8;
      --primary-2:#2563eb;
      --primary-3:#60a5fa;
      --secondary:#0f766e;
      --ink:#0f172a;
      --muted:#64748b;
      --soft:#f8fafc;
      --soft-blue:#eff6ff;
      --line:#dbe3ef;
      --white:#ffffff;
      --warning:#f59e0b;
      --success:#16a34a;
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:28px;
      --shadow-card:0 18px 50px rgba(15, 23, 42, .08);
      --shadow-hover:0 24px 70px rgba(29, 78, 216, .16);
      --ring:0 0 0 4px rgba(37, 99, 235, .16);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 8% 5%, rgba(96,165,250,.18), transparent 32%),
        radial-gradient(circle at 92% 12%, rgba(14,165,233,.12), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #ffffff 42%, #f8fafc 100%);
      line-height:1.65;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    ::selection{background:#bfdbfe;color:#172554}
    .site-shell{min-height:100vh;overflow:hidden}
    .container-xl{width:min(1180px, calc(100% - 32px));margin-inline:auto}
    .glass{
      background:rgba(255,255,255,.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border:1px solid rgba(219,227,239,.78);
      box-shadow:0 12px 38px rgba(15,23,42,.06);
    }
    .top-note{
      background:linear-gradient(90deg, #172554, #1d4ed8 52%, #0f766e);
      color:#eaf2ff;
      font-size:13px;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      color:#fff;font-weight:900;
      background:linear-gradient(135deg,#1d4ed8,#38bdf8 55%,#0f766e);
      box-shadow:0 10px 25px rgba(37,99,235,.25);
    }
    .nav-link{
      position:relative;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 16px;
      border-radius:999px;
      color:#334155;
      font-weight:700;
      transition:all .22s ease;
      white-space:nowrap;
    }
    .nav-link:hover{background:#eff6ff;color:#1d4ed8;transform:translateY(-1px)}
    .nav-link.active{background:#1d4ed8;color:white;box-shadow:0 12px 28px rgba(29,78,216,.22)}
    .search-box{
      display:flex;align-items:center;gap:10px;
      min-width:280px;
      padding:10px 14px;
      border:1px solid var(--line);
      border-radius:999px;
      background:#fff;
      transition:all .2s ease;
    }
    .search-box:focus-within{box-shadow:var(--ring);border-color:#93c5fd}
    .search-box input{width:100%;outline:none;border:0;background:transparent;color:#0f172a}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      border:0;border-radius:999px;
      padding:13px 20px;
      font-weight:800;
      letter-spacing:.01em;
      cursor:pointer;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      outline:none;
    }
    .btn:focus-visible{box-shadow:var(--ring)}
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,#1d4ed8,#2563eb);
      box-shadow:0 15px 32px rgba(29,78,216,.28);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 48px rgba(29,78,216,.34)}
    .btn-secondary{
      background:#fff;color:#1d4ed8;border:1px solid #bfdbfe;
      box-shadow:0 10px 26px rgba(15,23,42,.06);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:#60a5fa;box-shadow:0 18px 40px rgba(29,78,216,.13)}
    .btn-ghost{
      background:#eff6ff;color:#1e40af;border:1px solid transparent;
    }
    .btn-ghost:hover{background:#dbeafe;transform:translateY(-1px)}
    .badge{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:#eff6ff;color:#1d4ed8;
      border:1px solid #bfdbfe;
      font-size:13px;font-weight:800;
    }
    .badge.green{background:#ecfdf5;color:#047857;border-color:#a7f3d0}
    .badge.amber{background:#fffbeb;color:#b45309;border-color:#fde68a}
    .section-pad{padding:82px 0}
    .section-title{font-size:clamp(28px, 4vw, 44px);line-height:1.18;font-weight:900;letter-spacing:-.04em;color:#0f172a}
    .section-desc{color:#64748b;font-size:17px;line-height:1.8;max-width:760px}
    .card{
      background:#fff;border:1px solid rgba(219,227,239,.9);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-card);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#bfdbfe}
    .hero{
      position:relative;
      padding:58px 0 38px;
    }
    .hero-stage{
      min-height:620px;
      border-radius:36px;
      overflow:hidden;
      position:relative;
      background:
        linear-gradient(135deg, rgba(15,23,42,.78), rgba(29,78,216,.76)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1400' height='720' viewBox='0 0 1400 720'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' x2='1' y1='0' y2='1'%3E%3Cstop stop-color='%231d4ed8'/%3E%3Cstop offset='.55' stop-color='%2338bdf8'/%3E%3Cstop offset='1' stop-color='%230f766e'/%3E%3C/linearGradient%3E%3C/defs%3E%3Crect width='1400' height='720' fill='%23eaf4ff'/%3E%3Cg opacity='.54'%3E%3Ccircle cx='160' cy='150' r='120' fill='url(/%23g)'/%3E%3Ccircle cx='1150' cy='130' r='170' fill='%23bfdbfe'/%3E%3Ccircle cx='1040' cy='610' r='240' fill='%2393c5fd'/%3E%3Ccircle cx='420' cy='590' r='190' fill='%23ccfbf1'/%3E%3C/g%3E%3Cg opacity='.24' stroke='%23172554' stroke-width='2'%3E%3Cpath d='M100 380 C300 260 410 520 610 380 S960 260 1260 410' fill='none'/%3E%3Cpath d='M80 500 C280 390 510 640 720 490 S1020 390 1320 540' fill='none'/%3E%3C/g%3E%3Cg opacity='.24'%3E%3Crect x='120' y='215' width='220' height='128' rx='28' fill='%23fff'/%3E%3Crect x='420' y='155' width='310' height='180' rx='32' fill='%23fff'/%3E%3Crect x='820' y='235' width='330' height='190' rx='34' fill='%23fff'/%3E%3Crect x='270' y='430' width='260' height='150' rx='30' fill='%23fff'/%3E%3Crect x='650' y='450' width='360' height='160' rx='34' fill='%23fff'/%3E%3C/g%3E%3C/svg%3E");
      background-size:cover;
      background-position:center;
      box-shadow:0 28px 90px rgba(15,23,42,.22);
    }
    .hero-stage:before{
      content:"";position:absolute;inset:0;
      background:
        radial-gradient(circle at 18% 18%, rgba(255,255,255,.22), transparent 28%),
        linear-gradient(180deg, rgba(15,23,42,.06), rgba(15,23,42,.35));
      pointer-events:none;
    }
    .hero-content{
      position:relative;z-index:1;
      min-height:620px;
      display:flex;flex-direction:column;
      justify-content:space-between;
      padding:56px;
    }
    .hero-main{max-width:790px;color:#fff}
    .hero-main h1{
      font-size:clamp(40px, 6vw, 76px);
      line-height:1.02;
      font-weight:950;
      letter-spacing:-.065em;
      text-wrap:balance;
      margin:22px 0 24px;
    }
    .hero-main p{
      font-size:clamp(17px, 2vw, 21px);
      color:#eaf2ff;
      max-width:760px;
      line-height:1.85;
    }
    .hero-panel{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:16px;
      align-items:stretch;
    }
    .hero-tile{
      padding:22px;
      border-radius:24px;
      background:rgba(255,255,255,.9);
      color:#0f172a;
      border:1px solid rgba(255,255,255,.5);
      box-shadow:0 18px 44px rgba(15,23,42,.14);
    }
    .hero-tile strong{font-size:30px;line-height:1;font-weight:950;color:#1d4ed8}
    .hero-tile span{display:block;margin-top:8px;color:#475569;font-weight:700}
    .matrix-item{
      display:flex;gap:16px;align-items:flex-start;
      padding:22px;border-radius:24px;
      background:#fff;border:1px solid var(--line);
      box-shadow:0 12px 32px rgba(15,23,42,.05);
      transition:all .22s ease;
    }
    .matrix-item:hover{transform:translateY(-3px);border-color:#bfdbfe;box-shadow:0 20px 44px rgba(29,78,216,.12)}
    .icon-bubble{
      width:48px;height:48px;border-radius:18px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,#eff6ff,#dbeafe);
      color:#1d4ed8;font-size:22px;flex:0 0 auto;
    }
    .countdown-bar{
      background:linear-gradient(135deg,#172554,#1d4ed8);
      color:#fff;border-radius:30px;overflow:hidden;
      box-shadow:0 24px 70px rgba(29,78,216,.22);
    }
    .time-box{
      min-width:76px;
      padding:14px 12px;
      border-radius:18px;
      background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.2);
      text-align:center;
    }
    .time-box b{display:block;font-size:28px;line-height:1;font-weight:950}
    .time-box span{font-size:12px;color:#dbeafe}
    .timeline{
      position:relative;
    }
    .timeline:before{
      content:"";position:absolute;left:22px;top:12px;bottom:12px;
      width:2px;background:linear-gradient(#93c5fd,#1d4ed8,#99f6e4);
    }
    .timeline-item{
      position:relative;padding-left:66px;padding-bottom:28px;
    }
    .timeline-item:last-child{padding-bottom:0}
    .timeline-dot{
      position:absolute;left:8px;top:2px;
      width:30px;height:30px;border-radius:999px;
      background:#fff;border:7px solid #2563eb;
      box-shadow:0 8px 18px rgba(37,99,235,.22);
    }
    .news-link{
      display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
      padding:18px 0;border-bottom:1px solid #e2e8f0;
      transition:color .2s ease, padding-left .2s ease;
    }
    .news-link:hover{color:#1d4ed8;padding-left:6px}
    .news-link h3{font-weight:850;font-size:18px;line-height:1.45}
    .news-link p{font-size:14px;color:#64748b;margin-top:5px}
    .rank-item{
      display:flex;gap:14px;align-items:center;
      padding:14px;border-radius:18px;
      background:#f8fafc;border:1px solid #e2e8f0;
    }
    .rank-num{
      width:32px;height:32px;border-radius:12px;
      display:grid;place-items:center;
      background:#dbeafe;color:#1d4ed8;font-weight:950;
    }
    .proof-logo{
      min-height:78px;
      display:grid;place-items:center;text-align:center;
      border:1px solid #e2e8f0;border-radius:22px;
      background:#fff;color:#334155;font-weight:900;
      box-shadow:0 10px 24px rgba(15,23,42,.04);
    }
    .review{
      padding:22px;border-radius:24px;background:#fff;border:1px solid #dbe3ef;
      box-shadow:0 12px 34px rgba(15,23,42,.06);
    }
    .stars{color:#f59e0b;letter-spacing:2px}
    .faq-item{
      border:1px solid #dbe3ef;border-radius:22px;background:#fff;
      padding:20px 22px;
      box-shadow:0 10px 28px rgba(15,23,42,.05);
    }
    .faq-item summary{
      cursor:pointer;
      list-style:none;
      font-weight:900;
      color:#0f172a;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{
      content:"+";
      width:28px;height:28px;border-radius:999px;
      background:#eff6ff;color:#1d4ed8;
      display:grid;place-items:center;flex:0 0 auto;
      font-weight:950;
    }
    .faq-item[open] summary:after{content:"−";background:#1d4ed8;color:#fff}
    .faq-item p{margin-top:14px;color:#64748b;line-height:1.85}
    .app-card{
      position:relative;overflow:hidden;
      background:linear-gradient(135deg,#eff6ff,#ffffff 48%,#ecfeff);
      border:1px solid #bfdbfe;border-radius:34px;
      box-shadow:0 28px 80px rgba(29,78,216,.14);
    }
    .app-card:after{
      content:"";position:absolute;right:-90px;top:-80px;width:260px;height:260px;
      border-radius:999px;background:rgba(37,99,235,.12);
    }
    .footer{
      background:#0f172a;color:#cbd5e1;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer a{color:#e2e8f0;transition:color .2s ease}
    .footer a:hover{color:#93c5fd}
    .mobile-menu{display:none}
    @media (max-width:1024px){
      .search-box{min-width:220px}
      .hero-content{padding:42px}
      .hero-panel{grid-template-columns:1fr 1fr}
      .hero-tile:first-child{grid-column:1 / -1}
      .section-pad{padding:68px 0}
    }
    @media (max-width:768px){
      .desktop-search{display:none}
      .channel-row{overflow-x:auto;padding-bottom:10px;scrollbar-width:none}
      .channel-row::-webkit-scrollbar{display:none}
      .hero{padding-top:34px}
      .hero-stage{border-radius:28px;min-height:auto}
      .hero-content{min-height:auto;padding:30px;gap:36px}
      .hero-panel{grid-template-columns:1fr}
      .hero-main h1{letter-spacing:-.045em}
      .section-title{letter-spacing:-.03em}
      .matrix-item{padding:18px}
      .countdown-inner{flex-direction:column;align-items:flex-start}
      .time-wrap{width:100%;display:grid!important;grid-template-columns:repeat(4,1fr)}
      .time-box{min-width:0}
    }
    @media (max-width:520px){
      .container-xl{width:min(100% - 22px, 1180px)}
      .brand-text{font-size:16px}
      .hero-content{padding:24px}
      .hero-main p{font-size:16px}
      .hero-actions{flex-direction:column;align-items:stretch}
      .btn{width:100%;padding:13px 16px}
      .time-wrap{grid-template-columns:repeat(2,1fr)}
      .section-pad{padding:56px 0}
      .news-link{flex-direction:column}
      .timeline:before{left:17px}
      .timeline-dot{left:3px}
      .timeline-item{padding-left:54px}
    }