/* roulang page: index */
:root{
      --brand:#4f46e5;
      --brand-2:#06b6d4;
      --ink:#162033;
      --muted:#64748b;
      --bg:#f6f8fb;
      --card:#ffffff;
      --line:#e5eaf2;
      --soft-line:#edf1f7;
      --radius:24px;
      --radius-sm:16px;
      --shadow:0 18px 50px rgba(15,23,42,.08);
      --shadow-strong:0 28px 90px rgba(79,70,229,.18);
      --focus:0 0 0 4px rgba(79,70,229,.18);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 4%, rgba(79,70,229,.13), transparent 28%),
        radial-gradient(circle at 88% 10%, rgba(6,182,212,.14), transparent 26%),
        linear-gradient(180deg,#fbfcff 0%,#f6f8fb 42%,#ffffff 100%);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      line-height:1.78;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(79,70,229,.18)}
    .site-container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .skip-link{
      position:absolute;left:-999px;top:12px;z-index:9999;background:#fff;color:var(--brand);
      padding:10px 14px;border-radius:12px;box-shadow:var(--shadow)
    }
    .skip-link:focus{left:16px;outline:none;box-shadow:var(--focus),var(--shadow)}
    .nav-shell{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(160%) blur(18px);
      background:rgba(255,255,255,.82);
      border-bottom:1px solid rgba(226,232,240,.78);
    }
    .nav-bar{height:78px;display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center}
    .logo-mark{
      width:42px;height:42px;border-radius:16px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;display:grid;place-items:center;font-weight:900;letter-spacing:-.04em;
      box-shadow:0 12px 28px rgba(79,70,229,.28)
    }
    .brand-name{font-weight:900;letter-spacing:-.03em;line-height:1.18}
    .brand-sub{font-size:12px;color:var(--muted);margin-top:2px}
    .nav-search{
      display:flex;align-items:center;gap:10px;min-width:0;
      background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 12px 9px 16px;
      box-shadow:0 10px 30px rgba(15,23,42,.05);
      transition:.22s ease;
    }
    .nav-search:focus-within{border-color:rgba(79,70,229,.45);box-shadow:var(--focus),0 10px 30px rgba(15,23,42,.05)}
    .nav-search svg{width:19px;height:19px;color:#94a3b8;flex:0 0 auto}
    .nav-search input{width:100%;border:0;outline:0;background:transparent;color:var(--ink);min-width:0}
    .nav-search input::placeholder{color:#94a3b8}
    .nav-links{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .nav-link{
      padding:10px 15px;border-radius:999px;color:#475569;font-weight:700;font-size:14px;
      transition:.2s ease
    }
    .nav-link:hover{background:#f1f5f9;color:var(--brand)}
    .nav-link.active{background:rgba(79,70,229,.10);color:var(--brand)}
    .nav-cta{
      padding:11px 16px;border-radius:999px;color:#fff;font-weight:800;font-size:14px;
      background:linear-gradient(135deg,var(--brand),#7c3aed);
      box-shadow:0 14px 34px rgba(79,70,229,.25);
      transition:.22s ease;
    }
    .nav-cta:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(79,70,229,.32)}
    .mobile-search{display:none;padding-bottom:14px}

    .section{padding:76px 0}
    .section-tight{padding:48px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border:1px solid rgba(79,70,229,.16);
      border-radius:999px;background:rgba(255,255,255,.72);
      color:var(--brand);font-weight:800;font-size:13px;
    }
    .eyebrow-dot{width:8px;height:8px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 0 0 6px rgba(79,70,229,.1)}
    .section-title{font-size:clamp(28px,4vw,44px);line-height:1.18;font-weight:950;letter-spacing:-.05em;margin-top:14px}
    .section-desc{color:var(--muted);font-size:17px;max-width:760px;margin-top:16px}
    .hero{padding:56px 0 46px}
    .hero-panel{
      position:relative;overflow:hidden;border:1px solid rgba(226,232,240,.84);
      border-radius:34px;background:rgba(255,255,255,.78);
      box-shadow:var(--shadow-strong);
    }
    .hero-panel:before{
      content:"";position:absolute;inset:-1px;
      background:
        linear-gradient(90deg,rgba(79,70,229,.09),transparent 34%,rgba(6,182,212,.08)),
        radial-gradient(circle at 20% 10%,rgba(245,158,11,.16),transparent 22%);
      pointer-events:none;
    }
    .wave-lines{
      position:absolute;right:-40px;top:18px;width:420px;height:120px;opacity:.42;
      background:repeating-radial-gradient(ellipse at center, rgba(79,70,229,.28) 0 1px, transparent 2px 18px);
      transform:rotate(-8deg);border-radius:50%;
    }
    .hero-inner{position:relative;padding:42px;display:grid;grid-template-columns:1.08fr .92fr;gap:30px;align-items:stretch}
    h1{font-size:clamp(34px,5.3vw,66px);line-height:1.05;font-weight:950;letter-spacing:-.065em;margin-top:18px}
    .hero-copy{font-size:18px;color:#475569;max-width:760px;margin-top:18px}
    .btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:999px;padding:13px 20px;font-weight:900;
      border:1px solid transparent;transition:.22s ease;line-height:1.2;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;box-shadow:0 16px 38px rgba(79,70,229,.28)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 48px rgba(79,70,229,.34)}
    .btn-secondary{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:0 12px 26px rgba(15,23,42,.06)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(79,70,229,.35);color:var(--brand)}
    .btn-ghost{background:rgba(255,255,255,.62);border-color:rgba(226,232,240,.85);color:#475569}
    .btn-ghost:hover{background:#fff;color:var(--brand);transform:translateY(-2px)}
    .btn:focus-visible,.nav-link:focus-visible,.nav-cta:focus-visible,.form-input:focus,.form-select:focus,.news-link:focus-visible{outline:none;box-shadow:var(--focus)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}
    .metric{
      background:rgba(255,255,255,.72);border:1px solid rgba(226,232,240,.85);
      border-radius:20px;padding:16px;box-shadow:0 10px 26px rgba(15,23,42,.04)
    }
    .metric strong{display:block;font-size:26px;line-height:1;font-weight:950;color:var(--ink);letter-spacing:-.04em}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
    .demo-board{
      min-height:100%;border-radius:28px;background:#111827;color:#e5e7eb;padding:22px;
      position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)
    }
    .demo-board:before{
      content:"";position:absolute;inset:0;
      background:
        radial-gradient(circle at 20% 15%,rgba(79,70,229,.45),transparent 30%),
        radial-gradient(circle at 82% 12%,rgba(6,182,212,.32),transparent 26%);
      opacity:.85
    }
    .demo-content{position:relative}
    .demo-head{display:flex;align-items:center;justify-content:space-between;gap:14px}
    .demo-chip{font-size:12px;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.12);color:#cbd5e1;border:1px solid rgba(255,255,255,.12)}
    .signal-row{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;margin-top:22px}
    .signal-bar{height:12px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden}
    .signal-bar i{display:block;height:100%;width:84%;border-radius:inherit;background:linear-gradient(90deg,#22c55e,#06b6d4,#818cf8)}
    .stage-card{margin-top:20px;border:1px solid rgba(255,255,255,.12);border-radius:22px;background:rgba(255,255,255,.08);padding:18px}
    .stage-title{font-size:24px;font-weight:950;letter-spacing:-.04em;color:#fff}
    .stage-list{margin-top:16px;display:grid;gap:10px}
    .stage-item{display:flex;gap:10px;align-items:flex-start;color:#cbd5e1;font-size:14px}
    .check{
      width:22px;height:22px;display:grid;place-items:center;border-radius:50%;
      background:rgba(34,197,94,.16);color:#86efac;flex:0 0 auto;font-weight:900
    }
    .audio-wave{display:flex;align-items:end;gap:5px;height:54px;margin-top:22px}
    .audio-wave span{width:8px;border-radius:999px;background:linear-gradient(180deg,#67e8f9,#818cf8);opacity:.92}
    .audio-wave span:nth-child(1){height:22px}.audio-wave span:nth-child(2){height:38px}.audio-wave span:nth-child(3){height:28px}.audio-wave span:nth-child(4){height:48px}.audio-wave span:nth-child(5){height:34px}.audio-wave span:nth-child(6){height:44px}.audio-wave span:nth-child(7){height:26px}.audio-wave span:nth-child(8){height:52px}.audio-wave span:nth-child(9){height:32px}.audio-wave span:nth-child(10){height:42px}.audio-wave span:nth-child(11){height:24px}

    .play-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;margin-top:30px;align-items:start}
    .steps-card,.card{
      background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
      box-shadow:var(--shadow);transition:.22s ease
    }
    .card:hover,.steps-card:hover{transform:translateY(-3px);box-shadow:0 24px 64px rgba(15,23,42,.11)}
    .steps-card{padding:28px;position:sticky;top:102px}
    .step-list{display:grid;gap:16px;margin-top:20px}
    .step{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start}
    .step-num{
      width:42px;height:42px;border-radius:16px;display:grid;place-items:center;
      color:#fff;font-weight:950;background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 12px 26px rgba(79,70,229,.22)
    }
    .step h3{font-weight:950;font-size:18px;line-height:1.3}
    .step p{color:var(--muted);font-size:14px;margin-top:4px}
    .service-matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card{padding:22px}
    .icon-box{
      width:46px;height:46px;border-radius:17px;display:grid;place-items:center;
      background:rgba(79,70,229,.10);color:var(--brand);font-weight:950;margin-bottom:14px
    }
    .service-card h3{font-size:19px;font-weight:950;letter-spacing:-.03em}
    .service-card p{color:var(--muted);font-size:14px;margin-top:8px}

    .hot-layout{display:grid;grid-template-columns:1fr 360px;gap:24px;margin-top:30px}
    .deal-list{display:grid;gap:14px}
    .deal{
      display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;
      padding:18px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:0 12px 36px rgba(15,23,42,.055);
      transition:.22s ease;
    }
    .deal:hover{transform:translateY(-2px);border-color:rgba(79,70,229,.26);box-shadow:0 18px 48px rgba(15,23,42,.09)}
    .avatar{
      width:54px;height:54px;border-radius:20px;display:grid;place-items:center;font-weight:950;color:#fff;
      background:linear-gradient(135deg,#0f172a,#4f46e5)
    }
    .deal h3{font-size:18px;font-weight:950}
    .deal p{color:var(--muted);font-size:14px;margin-top:2px}
    .progress-wrap{min-width:138px}
    .progress-top{display:flex;justify-content:space-between;color:#64748b;font-size:12px;font-weight:800;margin-bottom:8px}
    .progress{height:9px;background:#edf2f7;border-radius:999px;overflow:hidden}
    .progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
    .side-reward{padding:24px;background:linear-gradient(180deg,#111827,#1e1b4b);color:#fff;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);box-shadow:var(--shadow-strong)}
    .reward-box{margin-top:18px;display:grid;gap:12px}
    .reward{padding:16px;border-radius:18px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.11)}
    .reward strong{display:block;font-weight:950}
    .reward span{display:block;color:#cbd5e1;font-size:13px;margin-top:4px}

    .news-layout{display:grid;grid-template-columns:1fr 340px;gap:24px;margin-top:30px}
    .news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
    .news-link{
      display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;
      padding:20px 22px;border-bottom:1px solid var(--soft-line);transition:.2s ease
    }
    .news-link:last-child{border-bottom:0}
    .news-link:hover{background:#f8fafc}
    .news-date{font-weight:900;color:var(--brand);font-size:14px}
    .news-title{font-weight:950;font-size:17px;line-height:1.38}
    .news-summary{color:var(--muted);font-size:14px;margin-top:5px}
    .arrow{color:#94a3b8;font-weight:950}
    .recommend{padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag{display:inline-flex;padding:8px 12px;border-radius:999px;background:#f1f5f9;color:#475569;font-size:13px;font-weight:800;transition:.2s ease}
    .tag:hover{background:rgba(79,70,229,.10);color:var(--brand)}

    .open-zone{padding:76px 0 88px}
    .trust-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
    .trust-item{display:flex;gap:12px;align-items:flex-start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 10px 28px rgba(15,23,42,.05)}
    .trust-icon{width:40px;height:40px;border-radius:15px;background:rgba(6,182,212,.1);color:#0891b2;display:grid;place-items:center;font-weight:950;flex:0 0 auto}
    .trust-item strong{display:block;font-weight:950}
    .trust-item span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
    .compare-wrap{margin-top:34px;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .compare-table{width:100%;border-collapse:separate;border-spacing:0}
    .compare-table th,.compare-table td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--soft-line);vertical-align:top}
    .compare-table th{background:#f8fafc;font-weight:950;color:#334155}
    .compare-table tr:last-child td{border-bottom:0}
    .plan-hot{position:relative;background:linear-gradient(180deg,rgba(79,70,229,.09),rgba(6,182,212,.05))}
    .badge{
      display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;
      background:rgba(245,158,11,.13);color:#b45309;font-size:12px;font-weight:900
    }
    .faq-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;margin-top:34px}
    .faq-list{display:grid;gap:14px}
    details{
      background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px 20px;
      box-shadow:0 10px 28px rgba(15,23,42,.045);transition:.2s ease
    }
    details[open]{border-color:rgba(79,70,229,.28);box-shadow:0 18px 44px rgba(79,70,229,.08)}
    summary{cursor:pointer;font-weight:950;list-style:none;display:flex;justify-content:space-between;gap:16px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"＋";color:var(--brand);font-weight:950}
    details[open] summary:after{content:"－"}
    details p{color:var(--muted);font-size:15px;margin-top:12px}
    .form-card{
      background:linear-gradient(135deg,#ffffff,#f8fbff);
      border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow-strong);padding:28px;
    }
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}
    .field{display:grid;gap:7px}
    .field.full{grid-column:1/-1}
    .field label{font-size:13px;font-weight:900;color:#334155}
    .form-input,.form-select{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:16px;
      padding:13px 14px;color:var(--ink);outline:none;transition:.2s ease
    }
    textarea.form-input{min-height:104px;resize:vertical}
    .form-hint{font-size:12px;color:#64748b;margin-top:12px}
    .submit-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:18px}

    footer{background:#0f172a;color:#cbd5e1;padding:52px 0 28px}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:28px}
    .footer-brand{display:flex;gap:12px;align-items:center;color:#fff}
    .footer-brand .logo-mark{box-shadow:none}
    .footer-title{font-weight:950;color:#fff;font-size:18px}
    .footer-desc{color:#94a3b8;margin-top:14px;max-width:560px;font-size:14px}
    .footer-col h3{color:#fff;font-weight:950;margin-bottom:12px}
    .footer-col a{display:block;color:#94a3b8;font-size:14px;padding:5px 0;transition:.2s ease}
    .footer-col a:hover{color:#fff;transform:translateX(3px)}
    .copyright{margin-top:34px;padding-top:22px;border-top:1px solid rgba(148,163,184,.18);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#94a3b8;font-size:13px}

    @media (max-width:1024px){
      .nav-bar{grid-template-columns:auto 1fr auto}
      .nav-search.desktop-search{display:none}
      .mobile-search{display:block}
      .hero-inner,.play-grid,.hot-layout,.news-layout,.faq-grid{grid-template-columns:1fr}
      .steps-card{position:relative;top:auto}
      .side-reward{order:-1}
      .trust-bar{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,1180px)}
      .nav-bar{height:auto;min-height:70px;gap:12px}
      .brand-sub{display:none}
      .nav-links{gap:6px}
      .nav-link{padding:9px 12px}
      .nav-cta{display:none}
      .hero{padding-top:32px}
      .hero-inner{padding:26px}
      .hero-metrics,.service-matrix,.trust-bar,.form-grid{grid-template-columns:1fr}
      .deal{grid-template-columns:auto 1fr}
      .progress-wrap{grid-column:1/-1}
      .news-link{grid-template-columns:1fr;gap:8px}
      .arrow{display:none}
      .compare-wrap{overflow-x:auto}
      .compare-table{min-width:720px}
      .footer-grid{grid-template-columns:1fr}
      .section{padding:58px 0}
      .open-zone{padding:58px 0 70px}
    }
    @media (max-width:520px){
      h1{letter-spacing:-.045em}
      .hero-inner{padding:22px;border-radius:26px}
      .hero-panel{border-radius:28px}
      .btn-row{flex-direction:column}
      .btn{width:100%}
      .demo-board{padding:18px;border-radius:22px}
      .section-title{letter-spacing:-.035em}
      .trust-item{align-items:flex-start}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }