:root{
      --bg:#f4f8ff;
      --panel:#ffffff;
      --panel2:#eef5ff;
      --line:#d9e4f4;
      --text:#162233;
      --muted:#5f6f86;
      --primary:#2f6bff;
      --primary2:#14b8a6;
      --accent:#ff8a3d;
      --shadow:0 18px 40px rgba(38,74,145,.12);
      --shadow2:0 10px 24px rgba(38,74,145,.09);
      --radius:20px;
      --radius2:28px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.12), transparent 30%),
        radial-gradient(circle at top right, rgba(20,184,166,.10), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f4f8ff 34%, #f8fbff 100%);
      min-height:100vh;
      overflow-x:hidden;
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(244,248,255,.82);
      border-bottom:1px solid rgba(217,228,244,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:var(--shadow2);padding:6px}
    .brand .name{font-weight:800;letter-spacing:.4px;font-size:18px;white-space:nowrap}
    .brand .sub{font-size:12px;color:var(--muted);margin-top:3px}
    .brand-txt{display:flex;flex-direction:column}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:10px 12px;border-radius:12px;cursor:pointer;box-shadow:var(--shadow2)
    }
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      color:var(--text);font-size:14px;padding:8px 10px;border-radius:999px;
      transition:.2s ease;background:transparent
    }
    .nav-links a:hover,.nav-links a.active{background:#eaf2ff;color:#14397a}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:13px 18px;font-weight:700;cursor:pointer;
      transition:.25s ease;box-shadow:var(--shadow2);white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#4b8dff);color:#fff}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    main{display:block}
    section{padding:72px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#2150c5;
      background:#eaf2ff;border:1px solid #d7e5ff;padding:7px 12px;border-radius:999px;font-weight:700
    }
    h1,h2,h3,p{margin:0}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.05;letter-spacing:-.02em}
    h2{font-size:clamp(26px,3vw,38px);line-height:1.15}
    h3{font-size:20px;line-height:1.2}
    p{line-height:1.8;color:var(--muted)}
    .hero{padding:34px 0 70px}
    .hero-grid{
      display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:stretch
    }
    .hero-card,.glass-card,.panel,.faq-item,.review-card,.article-card,.feature-card,.mini-card,.table-card,.form-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(217,228,244,.9);
      box-shadow:var(--shadow2);
      border-radius:var(--radius2);
    }
    .hero-card{
      padding:34px;position:relative;overflow:hidden
    }
    .hero-card:before,.hero-card:after{
      content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none
    }
    .hero-card:before{width:220px;height:220px;background:rgba(47,107,255,.12);right:-70px;top:-60px}
    .hero-card:after{width:180px;height:180px;background:rgba(20,184,166,.10);left:-40px;bottom:-50px}
    .hero-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px;position:relative;z-index:1}
    .hero-kicker{font-size:14px;color:#21407b;background:#eef5ff;padding:8px 12px;border-radius:999px;font-weight:700}
    .hero-copy{position:relative;z-index:1}
    .hero-copy p{max-width:64ch;font-size:16px;margin-top:16px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .hero-points{
      display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px;position:relative;z-index:1
    }
    .point{
      background:linear-gradient(180deg,#fff,#f7fbff);
      border:1px solid var(--line);border-radius:18px;padding:14px 14px 12px
    }
    .point strong{display:block;font-size:18px;color:#17315f}
    .point span{display:block;font-size:13px;color:var(--muted);margin-top:5px;line-height:1.6}
    .hero-side{display:grid;gap:14px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric{
      padding:20px;border-radius:22px;background:linear-gradient(180deg,#ffffff,#f3f8ff);
      border:1px solid var(--line)
    }
    .metric .num{font-size:30px;font-weight:900;color:#10377a;line-height:1}
    .metric .label{margin-top:8px;font-size:14px;color:var(--muted)}
    .side-panel{padding:20px}
    .side-panel h3{margin-bottom:8px}
    .platform-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .tag{padding:8px 12px;border-radius:999px;background:#eef5ff;color:#27467d;border:1px solid #dce7fb;font-size:13px}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .section-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-card{padding:22px}
    .feature-card .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,#eaf2ff,#dff7f3);color:#1750bb;font-size:20px
    }
    .feature-card ul{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .feature-card li{color:var(--muted);font-size:14px;line-height:1.7}
    .feature-card li:before{content:"• ";color:var(--primary);font-weight:700}
    .flow{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px
    }
    .step{padding:20px}
    .step .index{
      display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:999px;
      background:linear-gradient(135deg,#2f6bff,#58a0ff);color:#fff;font-weight:800;margin-bottom:14px
    }
    .step p{margin-top:10px;font-size:14px}
    .table-wrap{overflow:auto;border-radius:24px}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:860px}
    th,td{padding:16px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#eef5ff;color:#17315f;font-size:14px}
    tr:last-child td{border-bottom:0}
    .table-note{padding:18px 20px;border-top:1px solid var(--line);background:#fbfdff}
    .highlight{color:#0f8a70;font-weight:800}
    .price-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .mini-card,.review-card,.article-card{padding:22px}
    .price{
      font-size:34px;font-weight:900;color:#10377a;margin:12px 0 6px
    }
    .price small{font-size:14px;color:var(--muted);font-weight:600}
    .bullet-list{display:grid;gap:10px;padding:0;margin:14px 0 0;list-style:none}
    .bullet-list li{display:flex;gap:10px;color:var(--muted);font-size:14px;line-height:1.7}
    .bullet-list li:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:9px;flex:0 0 auto}
    .review-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}
    .stars{color:#ffb400;font-size:16px;letter-spacing:1px}
    .quote{font-size:14px;color:#34445b}
    .review-meta{margin-top:16px;font-size:13px;color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
      padding:18px 20px;border:0;background:transparent;cursor:pointer;color:var(--text);font-size:16px;font-weight:700;text-align:left
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease;color:var(--primary)}
    .form-card{padding:24px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#203756}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text)
    }
    .field textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:16px}
    .support-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .contact-box{padding:24px}
    .qrcode{
      display:flex;align-items:center;gap:16px;padding:18px;border:1px dashed #c9d8f0;background:#f8fbff;border-radius:20px
    }
    .qrcode img{width:122px;height:122px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .footer{
      background:#eef4ff;border-top:1px solid #d9e4f4;color:#1c2f4b;padding:34px 0 24px
    }
    .footer a{color:#224ea4}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr .9fr;gap:18px}
    .footer p,.footer li{color:#51657f}
    .footer h3{font-size:18px;margin-bottom:12px}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .footer-bottom{margin-top:20px;padding-top:16px;border-top:1px solid #d9e4f4;color:#63738a;font-size:13px}
    .float-contact{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .float-contact a,.backtop{
      width:54px;height:54px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg,#2f6bff,#67a3ff);color:#fff;box-shadow:var(--shadow);font-weight:800
    }
    .backtop{opacity:0;pointer-events:none;transition:.25s ease}
    .backtop.show{opacity:1;pointer-events:auto}
    .floating-panel{
      position:fixed;left:18px;bottom:18px;z-index:55;max-width:240px;background:rgba(255,255,255,.95);
      border:1px solid var(--line);box-shadow:var(--shadow2);border-radius:18px;padding:14px 14px 12px
    }
    .floating-panel strong{display:block;color:#18325e}
    .floating-panel span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.6}
    .accordion-list{display:grid;gap:12px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline .mini-card{position:relative}
    .timeline .mini-card:after{content:"";position:absolute;right:18px;top:18px;width:10px;height:10px;border-radius:50%;background:#2f6bff;box-shadow:0 0 0 6px rgba(47,107,255,.12)}
    .center-title{max-width:760px}
    .muted{color:var(--muted)}
    .article-card h3{font-size:18px}
    .article-card p{margin-top:10px}
    .article-card .more{display:inline-flex;margin-top:14px;font-weight:700}
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chips span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#41536c;font-size:13px}
    @media (max-width: 1024px){
      .hero-grid,.section-grid,.price-grid,.review-grid,.article-grid,.support-grid,.footer-grid,.two-col,.flow,.timeline{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .metric-grid{grid-template-columns:1fr 1fr}
      .nav-links{display:none}
      .nav-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:20px;right:20px;top:76px;flex-direction:column;align-items:stretch;
        background:rgba(255,255,255,.98);padding:14px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav-links a{padding:12px 14px}
      .section-head{align-items:flex-start;flex-direction:column}
      .form-grid{grid-template-columns:1fr}
      .floating-panel{display:none}
    }
    @media (max-width: 640px){
      section{padding:58px 0}
      .hero{padding-top:22px}
      .hero-card,.side-panel,.feature-card,.step,.mini-card,.review-card,.article-card,.form-card,.contact-box{padding:18px}
      h1{font-size:32px}
      .metric-grid{grid-template-columns:1fr}
      .hero-actions .btn{width:100%}
      .btn{width:100%}
      .float-contact{right:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}