/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-dark:#1d4ed8;
      --primary-soft:#eff6ff;
      --accent:#0ea5e9;
      --accent-soft:#e0f2fe;
      --ink:#0f172a;
      --muted:#64748b;
      --weak:#94a3b8;
      --line:#e2e8f0;
      --panel:#ffffff;
      --bg:#f8fbff;
      --bg-2:#f1f7ff;
      --success:#16a34a;
      --warning:#f59e0b;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:28px;
      --shadow:0 18px 45px rgba(15,23,42,.08);
      --shadow-hover:0 26px 70px rgba(15,23,42,.12);
      --focus:0 0 0 4px rgba(37,99,235,.18);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 2%, rgba(37,99,235,.10), transparent 32rem),
        radial-gradient(circle at 88% 12%, rgba(14,165,233,.09), transparent 30rem),
        linear-gradient(180deg,#fff 0%,var(--bg) 42%,#fff 100%);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(37,99,235,.18)}
    .site-container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .toolbar-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.84);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(226,232,240,.75);
    }
    .toolbar{
      min-height:74px;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
    }
    .brand{
      display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:-.02em;
      color:var(--ink);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;display:grid;place-items:center;
      box-shadow:0 16px 34px rgba(37,99,235,.24);
      position:relative;overflow:hidden;
    }
    .brand-mark:after{
      content:"";position:absolute;inset:8px;border:1px solid rgba(255,255,255,.42);border-radius:11px;
    }
    .brand-text{font-size:1.18rem}
    .nav-center{
      display:flex;align-items:center;gap:8px;
      padding:8px;border:1px solid var(--line);border-radius:999px;background:#fff;
      box-shadow:0 10px 28px rgba(15,23,42,.04);
    }
    .nav-link{
      display:inline-flex;align-items:center;gap:8px;
      height:38px;padding:0 18px;border-radius:999px;
      color:#475569;font-weight:700;font-size:.94rem;
      transition:all .22s ease;
    }
    .nav-link:hover{background:var(--primary-soft);color:var(--primary-dark)}
    .nav-link.active{background:var(--primary);color:#fff;box-shadow:0 10px 20px rgba(37,99,235,.18)}
    .toolbar-actions{display:flex;align-items:center;gap:10px}
    .status-pill{
      display:inline-flex;align-items:center;gap:8px;padding:10px 13px;border-radius:999px;
      border:1px solid var(--line);background:#fff;color:#475569;font-size:.88rem;font-weight:700;
    }
    .status-dot{width:8px;height:8px;border-radius:999px;background:var(--success);box-shadow:0 0 0 5px rgba(22,163,74,.13)}
    .bell-btn,.mobile-menu-btn{
      width:42px;height:42px;border-radius:15px;border:1px solid var(--line);
      background:#fff;color:#475569;display:grid;place-items:center;
      transition:all .22s ease;
    }
    .bell-btn:hover,.mobile-menu-btn:hover{border-color:#bfdbfe;color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow)}
    .toolbar-cta{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      height:42px;padding:0 18px;border-radius:15px;
      background:var(--ink);color:#fff;font-weight:800;
      transition:all .22s ease;
    }
    .toolbar-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 16px 30px rgba(37,99,235,.22)}
    .mobile-menu-btn{display:none}
    .mobile-panel{
      display:none;padding:0 0 16px;
    }
    .mobile-panel.open{display:block}
    .mobile-panel a{
      display:flex;align-items:center;justify-content:space-between;
      padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line);font-weight:800;
    }
    .section{padding:76px 0}
    .section-tight{padding:54px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-kicker{
      display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;
      background:var(--primary-soft);color:var(--primary-dark);font-weight:900;font-size:.86rem;margin-bottom:12px;
    }
    .section-title{font-size:clamp(1.8rem,3vw,2.65rem);line-height:1.18;font-weight:950;letter-spacing:-.04em}
    .section-desc{color:var(--muted);max-width:680px;margin-top:12px;font-size:1.02rem}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:48px;padding:0 20px;border-radius:16px;
      font-weight:900;border:1px solid transparent;
      transition:all .22s ease;white-space:nowrap;
    }
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 16px 34px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 22px 44px rgba(37,99,235,.27)}
    .btn-secondary{background:#fff;color:var(--ink);border-color:var(--line)}
    .btn-secondary:hover{border-color:#bfdbfe;color:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-ghost{background:rgba(37,99,235,.08);color:var(--primary-dark)}
    .btn-ghost:hover{background:rgba(37,99,235,.14)}
    .card{
      background:rgba(255,255,255,.92);border:1px solid rgba(226,232,240,.9);
      border-radius:var(--radius);box-shadow:var(--shadow);
      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}
    .badge{
      display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;
      background:#f8fafc;border:1px solid var(--line);color:#475569;font-size:.82rem;font-weight:800;
    }
    .badge.blue{background:var(--primary-soft);border-color:#bfdbfe;color:var(--primary-dark)}
    .badge.green{background:#ecfdf5;border-color:#bbf7d0;color:#15803d}
    .badge.orange{background:#fff7ed;border-color:#fed7aa;color:#c2410c}
    input,textarea,select{
      width:100%;border:1px solid var(--line);background:#fff;color:var(--ink);
      border-radius:15px;padding:13px 14px;outline:none;transition:all .2s ease;
    }
    input:focus,textarea:focus,select:focus{border-color:#93c5fd;box-shadow:var(--focus)}
    .hero{
      padding:44px 0 72px;
    }
    .hero-board{
      border:1px solid rgba(191,219,254,.75);
      border-radius:34px;
      background:
        linear-gradient(135deg,rgba(255,255,255,.96),rgba(239,246,255,.92)),
        radial-gradient(circle at 80% 20%,rgba(37,99,235,.16),transparent 26rem);
      box-shadow:0 30px 90px rgba(37,99,235,.13);
      overflow:hidden;
      position:relative;
    }
    .hero-board:before{
      content:"";position:absolute;inset:auto -12% -46% 44%;height:420px;
      background:radial-gradient(circle,rgba(14,165,233,.18),transparent 60%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;display:grid;grid-template-columns:1.1fr .8fr .78fr;gap:20px;padding:30px;
      align-items:stretch;
    }
    .hero-copy{padding:20px 10px 18px 18px;display:flex;flex-direction:column;justify-content:center}
    .hero h1{
      font-size:clamp(2.2rem,4.8vw,4.45rem);
      line-height:1.06;font-weight:950;letter-spacing:-.065em;margin:14px 0 18px;
    }
    .hero-lead{font-size:1.08rem;color:#475569;max-width:620px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
    .data-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:28px}
    .data-item{padding:14px;border-radius:18px;background:#fff;border:1px solid rgba(226,232,240,.9)}
    .data-value{font-size:1.28rem;font-weight:950;color:var(--primary-dark);line-height:1}
    .data-label{font-size:.82rem;color:var(--muted);margin-top:6px}
    .whitepaper-cover{
      min-height:430px;border-radius:26px;
      background:linear-gradient(155deg,#0f172a 0%,#1d4ed8 58%,#38bdf8 100%);
      color:#fff;padding:24px;display:flex;flex-direction:column;justify-content:space-between;
      box-shadow:0 26px 60px rgba(29,78,216,.24);position:relative;overflow:hidden;
    }
    .whitepaper-cover:before{
      content:"";position:absolute;width:260px;height:260px;border-radius:999px;right:-80px;top:-80px;
      background:rgba(255,255,255,.16);
    }
    .whitepaper-cover:after{
      content:"";position:absolute;left:24px;right:24px;bottom:110px;height:1px;background:rgba(255,255,255,.22);
    }
    .cover-top,.cover-bottom{position:relative;z-index:1}
    .cover-title{font-size:2.1rem;line-height:1.12;font-weight:950;letter-spacing:-.04em;margin-top:44px}
    .cover-list{display:grid;gap:10px;margin-top:18px;color:rgba(255,255,255,.86)}
    .cover-list span{display:flex;align-items:center;gap:8px}
    .lead-form{padding:22px;display:flex;flex-direction:column;justify-content:space-between}
    .form-title{font-size:1.25rem;font-weight:950;letter-spacing:-.02em}
    .form-note{font-size:.92rem;color:var(--muted);margin:8px 0 16px}
    .form-stack{display:grid;gap:11px}
    .privacy-note{font-size:.78rem;color:var(--weak);margin-top:11px}
    .success-note{
      display:none;margin-top:12px;padding:12px 14px;border-radius:14px;
      background:#ecfdf5;border:1px solid #bbf7d0;color:#166534;font-weight:800;font-size:.9rem;
    }
    .play-grid{display:grid;grid-template-columns:.95fr 1.35fr;gap:22px;align-items:start}
    .play-panel{padding:26px;position:sticky;top:96px}
    .play-steps{display:grid;gap:14px}
    .play-step{
      display:grid;grid-template-columns:50px 1fr;gap:14px;padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line);
    }
    .step-num{
      width:50px;height:50px;border-radius:18px;background:var(--primary-soft);color:var(--primary-dark);
      display:grid;place-items:center;font-weight:950;
    }
    .step-title{font-weight:950;margin-bottom:4px}
    .step-text{color:var(--muted);font-size:.94rem}
    .deal-board{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .deal-card{padding:22px}
    .deal-meta{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}
    .deal-title{font-size:1.18rem;font-weight:950;margin:12px 0 8px}
    .deal-text{color:var(--muted);font-size:.95rem;min-height:58px}
    .progress{height:9px;background:#eaf2ff;border-radius:999px;overflow:hidden;margin:18px 0 10px}
    .progress span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--accent))}
    .deal-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#64748b;font-size:.9rem}
    .guarantee-row{display:grid;grid-template-columns:1.15fr repeat(3,1fr);gap:16px}
    .guarantee-main{padding:26px;background:linear-gradient(135deg,#172554,#1d4ed8);color:#fff}
    .guarantee-main p{color:rgba(255,255,255,.78);margin-top:10px}
    .guarantee-item{padding:22px}
    .icon-box{
      width:48px;height:48px;border-radius:17px;background:var(--primary-soft);color:var(--primary-dark);
      display:grid;place-items:center;margin-bottom:16px;
    }
    .intro-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .intro-card{padding:22px;position:relative;overflow:hidden}
    .intro-card:after{
      content:"";position:absolute;right:-34px;bottom:-34px;width:100px;height:100px;border-radius:999px;background:rgba(37,99,235,.06);
    }
    .intro-card strong{font-size:1.08rem;display:block;margin-bottom:8px}
    .intro-card p{color:var(--muted);font-size:.94rem;position:relative;z-index:1}
    .timeline-wrap{
      display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;align-items:start;
    }
    .timeline-list{position:relative;display:grid;gap:14px}
    .timeline-item{
      display:grid;grid-template-columns:92px 1fr;gap:16px;padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line);
    }
    .time{font-weight:950;color:var(--primary-dark)}
    .timeline-title{font-weight:950;margin-bottom:5px}
    .timeline-text{color:var(--muted);font-size:.94rem}
    .timeline-aside{padding:26px;background:#fff}
    .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .news-layout{display:grid;grid-template-columns:1.45fr .75fr;gap:22px}
    .news-list{padding:10px}
    .news-item{
      display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;
      padding:18px;border-radius:18px;border-bottom:1px solid var(--line);
      transition:background .2s ease,transform .2s ease;
    }
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:var(--primary-soft);transform:translateX(3px)}
    .news-date{color:var(--primary-dark);font-weight:950;font-size:.92rem}
    .news-title{font-weight:950}
    .news-summary{color:var(--muted);font-size:.92rem;margin-top:4px}
    .arrow{color:var(--weak);font-weight:900}
    .recommend{padding:24px;background:linear-gradient(180deg,#fff,#eff6ff)}
    .recommend-list{display:grid;gap:12px;margin-top:16px}
    .recommend-list a{
      display:flex;justify-content:space-between;gap:12px;padding:13px 14px;border-radius:15px;background:#fff;border:1px solid var(--line);
      font-weight:800;color:#334155;transition:all .2s ease;
    }
    .recommend-list a:hover{border-color:#bfdbfe;color:var(--primary-dark);transform:translateY(-2px)}
    .faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:24px}
    .faq-list{display:grid;gap:14px}
    details{
      background:#fff;border:1px solid var(--line);border-radius:20px;padding:0 18px;
      box-shadow:0 12px 30px rgba(15,23,42,.04);
    }
    details[open]{border-color:#bfdbfe;box-shadow:var(--shadow)}
    summary{
      list-style:none;cursor:pointer;padding:18px 0;font-weight:950;display:flex;justify-content:space-between;gap:18px;
    }
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";font-weight:950;color:var(--primary)}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);padding:0 0 18px;margin:0}
    .cta-section{padding-bottom:90px}
    .cta-box{
      display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:center;
      padding:34px;border-radius:32px;background:linear-gradient(135deg,#eff6ff,#ffffff 48%,#e0f2fe);
      border:1px solid #bfdbfe;box-shadow:var(--shadow);
    }
    .cta-form{display:grid;grid-template-columns:1fr 1fr auto;gap:12px}
    .site-footer{
      background:#0f172a;color:#cbd5e1;padding:46px 0 34px;
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:24px;align-items:start}
    .footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-weight:950;font-size:1.12rem}
    .footer-text{margin-top:14px;color:#94a3b8;max-width:560px}
    .footer-card{
      border:1px solid rgba(148,163,184,.18);border-radius:20px;padding:18px;background:rgba(255,255,255,.04);
    }
    .footer-card strong{color:#fff}
    .footer-links{display:grid;gap:10px;margin-top:12px}
    .footer-links a{color:#cbd5e1;transition:color .2s ease}
    .footer-links a:hover{color:#93c5fd}
    .copyright{border-top:1px solid rgba(148,163,184,.18);margin-top:28px;padding-top:20px;color:#94a3b8;font-size:.9rem;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
    .sr-focus:focus-visible,.btn:focus-visible,a:focus-visible,button:focus-visible{outline:none;box-shadow:var(--focus)}
    @media (max-width:1024px){
      .hero-grid{grid-template-columns:1fr 1fr}
      .lead-form{grid-column:1/-1}
      .play-grid,.timeline-wrap,.news-layout,.faq-grid,.cta-box{grid-template-columns:1fr}
      .play-panel{position:static}
      .deal-board,.guarantee-row{grid-template-columns:repeat(2,1fr)}
      .guarantee-main{grid-column:1/-1}
      .intro-flow{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-center,.status-pill,.bell-btn,.toolbar-cta{display:none}
      .mobile-menu-btn{display:grid}
      .toolbar{min-height:66px}
      .hero{padding-top:24px}
      .hero-grid{grid-template-columns:1fr;padding:18px}
      .hero-copy{padding:10px}
      .whitepaper-cover{min-height:360px}
      .data-strip{grid-template-columns:1fr}
      .section{padding:56px 0}
      .section-head{display:block}
      .deal-board,.guarantee-row,.intro-flow{grid-template-columns:1fr}
      .news-item{grid-template-columns:1fr;gap:8px}
      .timeline-item{grid-template-columns:1fr;gap:8px}
      .cta-form{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .hero-board{border-radius:24px}
      .hero h1{font-size:2.05rem;letter-spacing:-.045em}
      .hero-actions{display:grid}
      .btn{width:100%}
      .section-title{font-size:1.65rem}
      .whitepaper-cover{padding:20px}
      .cover-title{font-size:1.65rem}
      .cta-box{padding:22px;border-radius:24px}
      .brand-text{font-size:1rem}
    }