/* roulang page: index */
:root{
      --brand:#8b5cf6;
      --brand-2:#5b21b6;
      --accent:#fb7185;
      --mint:#2dd4bf;
      --ink:#111827;
      --text:#263244;
      --muted:#667085;
      --weak:#98a2b3;
      --bg:#f7f4ff;
      --surface:#ffffff;
      --surface-2:#fbfaff;
      --border:rgba(108, 86, 170, .16);
      --ring:rgba(139, 92, 246, .32);
      --shadow:0 24px 70px rgba(31, 28, 75, .12);
      --shadow-sm:0 12px 32px rgba(31, 28, 75, .08);
      --radius-xl:30px;
      --radius-lg:22px;
      --radius-md:16px;
      --sidebar:286px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;text-size-adjust:100%}
    body{
      margin:0;
      min-height:100vh;
      font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;
      color:var(--text);
      line-height:1.72;
      background:
        radial-gradient(circle at 20% 8%, rgba(139,92,246,.18), transparent 34%),
        radial-gradient(circle at 78% 20%, rgba(251,113,133,.14), transparent 32%),
        linear-gradient(180deg,#fff 0%,var(--bg) 46%,#fff 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(139,92,246,.22);color:var(--brand-2)}
    .container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .main-wrap{margin-left:var(--sidebar);min-height:100vh}
    .section{padding:86px 0;position:relative}
    .section-tight{padding:64px 0}
    .section-title{font-size:clamp(28px,3vw,44px);line-height:1.16;letter-spacing:-.04em;color:var(--ink);font-weight:900}
    .section-desc{margin-top:16px;color:var(--muted);font-size:17px;max-width:760px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      border:1px solid rgba(139,92,246,.22);
      background:rgba(255,255,255,.76);
      color:var(--brand-2);font-weight:800;font-size:13px;
      box-shadow:0 10px 22px rgba(91,33,182,.06);
    }
    .eyebrow::before{content:"";width:8px;height:8px;border-radius:999px;background:linear-gradient(135deg,var(--mint),var(--brand))}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      min-height:48px;padding:13px 20px;border-radius:999px;
      font-weight:850;border:1px solid transparent;white-space:nowrap;
      transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
    }
    .btn:focus,.nav-link:focus,.field:focus,.faq-item summary:focus{outline:4px solid var(--ring);outline-offset:3px}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 16px 35px rgba(91,33,182,.28)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 24px 48px rgba(91,33,182,.32)}
    .btn-secondary{background:#fff;color:var(--brand-2);border-color:rgba(139,92,246,.22);box-shadow:0 14px 32px rgba(31,28,75,.08)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(139,92,246,.42);box-shadow:0 20px 46px rgba(31,28,75,.12)}
    .btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.24);backdrop-filter:blur(12px)}
    .btn-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
    .badge{
      display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:999px;
      background:rgba(139,92,246,.09);color:var(--brand-2);font-size:12px;font-weight:850;
      border:1px solid rgba(139,92,246,.14)
    }
    .card{
      background:rgba(255,255,255,.86);
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      backdrop-filter:blur(16px);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(139,92,246,.28)}
    .sidebar{
      position:fixed;inset:0 auto 0 0;width:var(--sidebar);z-index:50;
      padding:26px 18px;
      background:rgba(255,255,255,.74);
      border-right:1px solid rgba(139,92,246,.14);
      backdrop-filter:blur(22px);
      box-shadow:10px 0 40px rgba(31,28,75,.06);
      display:flex;flex-direction:column;gap:22px;
    }
    .brand{
      display:flex;align-items:center;gap:12px;padding:12px;border-radius:22px;color:var(--ink);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:conic-gradient(from 180deg,var(--brand),var(--accent),var(--mint),var(--brand));
      box-shadow:0 16px 34px rgba(139,92,246,.28);
      color:#fff;font-weight:950;
    }
    .brand-text{font-size:17px;font-weight:950;line-height:1.2;letter-spacing:-.03em}
    .brand-sub{display:block;color:var(--weak);font-size:12px;font-weight:800;margin-top:2px}
    .nav-panel{display:flex;flex-direction:column;gap:10px}
    .nav-link{
      display:flex;align-items:center;gap:10px;padding:13px 14px;border-radius:16px;
      color:#526071;font-weight:850;border:1px solid transparent;
    }
    .nav-link:hover{background:rgba(139,92,246,.08);color:var(--brand-2)}
    .nav-link.active{background:linear-gradient(135deg,rgba(139,92,246,.16),rgba(251,113,133,.10));color:var(--brand-2);border-color:rgba(139,92,246,.18)}
    .sidebar-note{
      margin-top:auto;padding:16px;border-radius:22px;
      background:linear-gradient(145deg,#231942,#5b21b6);
      color:#fff;overflow:hidden;position:relative;
    }
    .sidebar-note::after{content:"";position:absolute;right:-34px;bottom:-42px;width:130px;height:130px;background:rgba(45,212,191,.2);border-radius:999px}
    .sidebar-note strong{display:block;font-size:15px;margin-bottom:6px}
    .sidebar-note p{font-size:12px;color:rgba(255,255,255,.74);line-height:1.55;margin:0}
    .mobile-header{display:none}
    .hero{
      min-height:720px;
      display:flex;align-items:center;
      padding:34px 0 80px;
      background:
        linear-gradient(180deg,rgba(17,24,39,.28),rgba(17,24,39,.72)),
        radial-gradient(circle at 24% 20%,rgba(251,113,133,.65),transparent 28%),
        radial-gradient(circle at 78% 12%,rgba(45,212,191,.46),transparent 26%),
        linear-gradient(135deg,#24114b 0%,#5b21b6 45%,#111827 100%);
      color:#fff;position:relative;overflow:hidden;
    }
    .hero::before{
      content:"";position:absolute;inset:0;
      background-image:
        linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
      background-size:64px 64px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.85),rgba(0,0,0,.16));
    }
    .hero::after{
      content:"";position:absolute;left:8%;right:8%;bottom:-1px;height:120px;
      background:linear-gradient(180deg,transparent,rgba(247,244,255,1));
      pointer-events:none;
    }
    .hero-inner{position:relative;z-index:1}
    .hero-kv{
      width:min(980px,100%);
      margin-inline:auto;
      text-align:center;
      padding:72px 34px 38px;
      border:1px solid rgba(255,255,255,.18);
      border-radius:42px;
      background:linear-gradient(180deg,rgba(255,255,255,.14),rgba(255,255,255,.07));
      box-shadow:0 40px 120px rgba(0,0,0,.24);
      backdrop-filter:blur(18px);
    }
    .hero h1{
      margin:22px auto 0;
      max-width:860px;
      font-size:clamp(42px,6.4vw,84px);
      line-height:.98;
      letter-spacing:-.075em;
      font-weight:950;
    }
    .hero-intro{
      margin:24px auto 0;
      max-width:790px;
      color:rgba(255,255,255,.82);
      font-size:clamp(16px,1.8vw,20px);
      line-height:1.85;
    }
    .countdown-bar{
      margin:30px auto 0;
      width:min(760px,100%);
      display:grid;grid-template-columns:1.1fr repeat(4,.7fr);gap:10px;align-items:center;
      padding:10px;border-radius:24px;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.18);
    }
    .countdown-title{text-align:left;padding-left:12px;font-weight:900;color:#fff}
    .timebox{
      padding:11px 8px;border-radius:18px;background:rgba(255,255,255,.16);
      border:1px solid rgba(255,255,255,.14);
    }
    .timebox b{display:block;font-size:24px;line-height:1;font-weight:950}
    .timebox span{display:block;margin-top:4px;font-size:12px;color:rgba(255,255,255,.68)}
    .hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
    .hero-metrics{margin:28px auto 0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:760px}
    .metric{
      padding:15px;border-radius:22px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
      text-align:left;
    }
    .metric strong{display:block;font-size:22px;color:#fff;font-weight:950}
    .metric span{display:block;color:rgba(255,255,255,.68);font-size:13px;margin-top:3px}
    .stage-shell{
      display:grid;grid-template-columns:1fr .78fr;gap:26px;align-items:stretch;margin-top:34px;
    }
    .dashboard{
      border-radius:34px;padding:24px;
      background:linear-gradient(145deg,#ffffff,#f6f1ff);
      border:1px solid rgba(139,92,246,.18);
      box-shadow:var(--shadow);
      position:relative;overflow:hidden;
    }
    .dashboard::before{content:"";position:absolute;right:-90px;top:-90px;width:230px;height:230px;background:rgba(251,113,133,.16);border-radius:999px}
    .dash-top{display:flex;justify-content:space-between;gap:16px;align-items:center;position:relative}
    .dash-window{margin-top:20px;border-radius:26px;background:#17132b;color:#fff;overflow:hidden;position:relative;border:1px solid rgba(255,255,255,.08)}
    .window-head{height:48px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.08)}
    .dots{display:flex;gap:7px}
    .dots i{width:10px;height:10px;border-radius:999px;background:var(--accent);display:block}
    .dots i:nth-child(2){background:#fbbf24}.dots i:nth-child(3){background:var(--mint)}
    .screen-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;padding:20px}
    .screen-panel{border-radius:20px;background:rgba(255,255,255,.08);padding:18px;border:1px solid rgba(255,255,255,.08)}
    .line{height:10px;border-radius:99px;background:rgba(255,255,255,.17);margin-top:12px}
    .line.short{width:62%}.line.mid{width:78%}
    .pulse-card{
      min-height:168px;border-radius:22px;padding:20px;
      background:linear-gradient(135deg,rgba(139,92,246,.28),rgba(45,212,191,.18));
      border:1px solid rgba(255,255,255,.11);
      display:flex;flex-direction:column;justify-content:space-between;
    }
    .progress{height:10px;border-radius:999px;background:rgba(255,255,255,.14);overflow:hidden;margin-top:18px}
    .progress span{display:block;height:100%;width:76%;border-radius:999px;background:linear-gradient(90deg,var(--mint),var(--accent))}
    .stage-side{display:grid;gap:18px}
    .mini-stat{padding:22px;border-radius:26px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm)}
    .mini-stat b{font-size:34px;line-height:1;color:var(--brand-2);font-weight:950}
    .mini-stat p{margin:8px 0 0;color:var(--muted);font-size:14px}
    .step-wrap{display:grid;grid-template-columns:.82fr 1.18fr;gap:30px;margin-top:34px;align-items:start}
    .steps{display:grid;gap:16px}
    .step-card{display:grid;grid-template-columns:54px 1fr;gap:16px;padding:20px;border-radius:24px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm)}
    .step-num{width:54px;height:54px;border-radius:18px;display:grid;place-items:center;color:#fff;font-weight:950;background:linear-gradient(135deg,var(--brand),var(--accent));box-shadow:0 14px 30px rgba(139,92,246,.22)}
    .step-card h3{font-weight:950;color:var(--ink);font-size:18px;margin:0}
    .step-card p{margin:6px 0 0;color:var(--muted);font-size:14px;line-height:1.65}
    .topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .topic-card{padding:22px;border-radius:24px;background:linear-gradient(145deg,#fff,#fbf9ff);border:1px solid var(--border)}
    .topic-card h3{font-size:18px;font-weight:950;color:var(--ink);margin:12px 0 8px}
    .topic-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
    .timeline{margin-top:34px;border-left:2px solid rgba(139,92,246,.2);padding-left:24px;display:grid;gap:18px}
    .timeline-item{position:relative;padding:20px;border-radius:24px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm)}
    .timeline-item::before{content:"";position:absolute;left:-32px;top:26px;width:14px;height:14px;border-radius:999px;background:var(--brand);box-shadow:0 0 0 7px rgba(139,92,246,.14)}
    .timeline-time{color:var(--brand-2);font-weight:950;font-size:13px}
    .timeline-item h3{margin:6px 0 6px;color:var(--ink);font-weight:950;font-size:19px}
    .timeline-item p{margin:0;color:var(--muted);font-size:14px}
    .review-wall{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px;margin-top:34px}
    .review{padding:22px;border-radius:26px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm)}
    .review:nth-child(2){transform:translateY(18px);background:linear-gradient(145deg,#fff,#fff7fb)}
    .review:hover{transform:translateY(-4px)}
    .review:nth-child(2):hover{transform:translateY(12px)}
    .stars{letter-spacing:2px;color:#f59e0b;font-size:14px}
    .review p{margin:14px 0;color:#465366;font-size:15px}
    .review-user{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:900}
    .avatar{width:36px;height:36px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--mint));display:grid;place-items:center;color:#fff;font-size:13px;font-weight:950}
    .news-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:24px;margin-top:34px}
    .news-list{background:#fff;border:1px solid var(--border);border-radius:28px;box-shadow:var(--shadow-sm);overflow:hidden}
    .news-link{display:grid;grid-template-columns:116px 1fr auto;gap:18px;padding:20px;border-bottom:1px solid rgba(139,92,246,.12);align-items:center}
    .news-link:last-child{border-bottom:0}
    .news-link:hover{background:rgba(139,92,246,.055)}
    .news-date{font-size:13px;color:var(--brand-2);font-weight:950}
    .news-link h3{font-size:18px;line-height:1.35;font-weight:950;color:var(--ink);margin:0}
    .news-link p{font-size:14px;color:var(--muted);margin:6px 0 0;line-height:1.55}
    .arrow{width:34px;height:34px;border-radius:999px;background:rgba(139,92,246,.09);color:var(--brand-2);display:grid;place-items:center;font-weight:950}
    .recommend{padding:24px;border-radius:28px;background:linear-gradient(145deg,#25124e,#111827);color:#fff;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .recommend::after{content:"";position:absolute;right:-52px;bottom:-52px;width:160px;height:160px;border-radius:999px;background:rgba(45,212,191,.20)}
    .recommend h3{font-size:22px;font-weight:950;margin:12px 0}
    .recommend p{color:rgba(255,255,255,.72);font-size:14px}
    .rec-list{display:grid;gap:10px;margin-top:18px;position:relative}
    .rec-list li{list-style:none;padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.11);font-size:14px}
    .faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:28px;margin-top:34px}
    .faq-items{display:grid;gap:14px}
    .faq-item{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-sm);overflow:hidden}
    .faq-item summary{list-style:none;padding:20px 22px;font-weight:950;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;gap:16px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"+";width:28px;height:28px;border-radius:999px;background:rgba(139,92,246,.10);color:var(--brand-2);display:grid;place-items:center;flex:0 0 auto}
    .faq-item[open] summary::after{content:"–";background:var(--brand);color:#fff}
    .faq-item p{padding:0 22px 20px;margin:0;color:var(--muted);font-size:15px}
    .download{padding:82px 0 96px}
    .download-panel{
      display:grid;grid-template-columns:1fr .88fr;gap:34px;align-items:center;
      padding:36px;border-radius:38px;
      background:
        radial-gradient(circle at 18% 20%,rgba(45,212,191,.20),transparent 32%),
        linear-gradient(135deg,#ffffff,#f4efff);
      border:1px solid rgba(139,92,246,.2);
      box-shadow:var(--shadow);
    }
    .form-card{background:#fff;border:1px solid var(--border);border-radius:28px;padding:24px;box-shadow:var(--shadow-sm)}
    .form-grid{display:grid;gap:14px;margin-top:18px}
    .field{
      width:100%;height:52px;border-radius:16px;border:1px solid rgba(139,92,246,.18);
      background:#fbfaff;padding:0 15px;color:var(--ink);outline:none;
      transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .field:hover{border-color:rgba(139,92,246,.34)}
    .field:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px var(--ring)}
    .privacy{font-size:12px;color:var(--weak);line-height:1.6;margin:10px 0 0}
    .toast{
      display:none;margin-top:12px;padding:12px 14px;border-radius:16px;background:rgba(45,212,191,.12);
      border:1px solid rgba(45,212,191,.24);color:#0f766e;font-weight:850;font-size:13px;
    }
    .toast.show{display:block}
    .footer{
      margin-left:var(--sidebar);
      background:#111827;color:rgba(255,255,255,.72);
      padding:48px 0 34px;
    }
    .footer-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:start}
    .footer-brand{color:#fff;font-size:22px;font-weight:950;letter-spacing:-.03em}
    .footer p{margin:10px 0 0;max-width:680px;font-size:14px}
    .footer-links{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);font-size:13px}
    .footer-links a:hover{background:rgba(255,255,255,.12);color:#fff}
    .copyright{margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.09);font-size:13px;color:rgba(255,255,255,.52)}
    .floating-cta{
      position:fixed;right:22px;bottom:22px;z-index:45;
      display:flex;gap:10px;align-items:center;
      padding:10px;border-radius:999px;background:rgba(17,24,39,.88);
      border:1px solid rgba(255,255,255,.12);box-shadow:0 18px 48px rgba(0,0,0,.20);
      backdrop-filter:blur(18px);
    }
    .floating-cta span{color:rgba(255,255,255,.72);font-size:13px;font-weight:850;padding-left:8px}
    @media (max-width:1024px){
      :root{--sidebar:0px}
      .sidebar{display:none}
      .main-wrap,.footer{margin-left:0}
      .mobile-header{
        position:sticky;top:0;z-index:60;display:block;
        background:rgba(255,255,255,.84);border-bottom:1px solid rgba(139,92,246,.14);
        backdrop-filter:blur(18px);
      }
      .mobile-inner{width:min(var(--container),calc(100% - 32px));margin-inline:auto;display:flex;justify-content:space-between;align-items:center;padding:12px 0}
      .mobile-nav{display:flex;gap:8px;align-items:center}
      .stage-shell,.step-wrap,.faq-grid,.download-panel{grid-template-columns:1fr}
      .review-wall{grid-template-columns:1fr 1fr}
      .review:nth-child(2){transform:none}
      .review:nth-child(2):hover{transform:translateY(-4px)}
      .news-layout{grid-template-columns:1fr}
      .hero{min-height:650px;padding-top:56px}
    }
    @media (max-width:768px){
      .container{width:min(100% - 28px,var(--container))}
      .section{padding:62px 0}
      .hero-kv{padding:48px 18px 28px;border-radius:30px}
      .countdown-bar{grid-template-columns:repeat(4,1fr)}
      .countdown-title{grid-column:1/-1;text-align:center;padding-left:0}
      .hero-metrics{grid-template-columns:1fr}
      .screen-grid,.topic-grid,.review-wall{grid-template-columns:1fr}
      .news-link{grid-template-columns:1fr auto;gap:12px}
      .news-date{grid-column:1/-1}
      .download-panel{padding:24px;border-radius:28px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
      .floating-cta{left:14px;right:14px;justify-content:space-between}
      .floating-cta span{display:none}
    }
    @media (max-width:520px){
      .brand-text{font-size:15px}
      .mobile-nav .btn{padding:10px 12px;min-height:42px;font-size:13px}
      .hero h1{font-size:40px}
      .hero-actions{flex-direction:column}
      .hero-actions .btn{width:100%}
      .timebox b{font-size:20px}
      .section-title{font-size:30px}
      .step-card{grid-template-columns:1fr}
      .news-link{grid-template-columns:1fr}
      .arrow{display:none}
    }