:root{
      --bg:#f5f8ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#163052;
      --muted:#5c6b84;
      --line:#dbe5f4;
      --primary:#0e5bd7;
      --primary2:#0a3f9d;
      --accent:#2aa7ff;
      --shadow:0 18px 40px rgba(14,91,215,.10);
      --shadow2:0 10px 24px rgba(9, 38, 96, .10);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 15% 10%, rgba(42,167,255,.15), transparent 28%),
        radial-gradient(circle at 85% 0%, rgba(14,91,215,.12), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, #f9fbff 100%);
      line-height:1.7;
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.88);backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(219,229,244,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:72px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a.active{background:#eaf2ff;color:var(--primary)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;border:1px solid transparent;
      font-weight:700;transition:.24s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#2581ff);color:#fff;box-shadow:var(--shadow)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 30px rgba(14,91,215,.18)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#b9cbee;transform:translateY(-2px)}
    .menu-btn{display:none}
    .hero{
      padding:42px 0 30px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.faq-item,.quote,.timeline li,.pricebox,.formbox,.compare{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(219,229,244,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow2);
    }
    .hero-main{padding:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;background:#eaf2ff;color:var(--primary);
      font-weight:700;font-size:13px;margin-bottom:18px;
    }
    h1{margin:0 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.12;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:60ch}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:24px 0}
    .mini{
      background:linear-gradient(180deg,#f7fbff,#eef5ff);
      border:1px solid #d7e4f8;border-radius:16px;padding:14px 14px 13px;
    }
    .mini b{display:block;font-size:18px;color:var(--primary2)}
    .mini span{display:block;font-size:13px;color:var(--muted)}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:16px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#ffffff,#f4f8ff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:24px;color:var(--primary);line-height:1.1}
    .stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
    .section{padding:22px 0}
    .section h2{margin:0 0 10px;font-size:clamp(24px,3vw,34px);line-height:1.2}
    .section .sub{margin:0 0 20px;color:var(--muted);max-width:72ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted)}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#edf5ff;color:var(--primary);font-size:12px;font-weight:700}
    .list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;color:var(--muted)}
    .list li:before{content:"";width:10px;height:10px;margin-top:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));flex:0 0 auto}
    .panel{padding:22px}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f6f9ff);
      border:1px solid var(--line);position:relative
    }
    .step .num{
      width:34px;height:34px;border-radius:12px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),#1e74ff);color:#fff;font-weight:800;margin-bottom:12px
    }
    .compare-wrap,.faq-wrap,.reviews,.articles,.services,.network,.tags,.timeline-wrap{display:grid;gap:18px}
    table{width:100%;border-collapse:collapse}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f9ff;color:var(--text)}
    .highlight{color:var(--primary2);font-weight:800}
    .flex-two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .faq-item button{
      width:100%;text-align:left;background:none;border:0;padding:18px 18px;font:inherit;color:var(--text);display:flex;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-item .answer{padding:0 18px 18px;color:var(--muted);display:none}
    .faq-item.open .answer{display:block}
    .faq-item.open .icon{transform:rotate(45deg)}
    .icon{transition:.2s ease}
    .quote{padding:18px}
    .quote strong{display:block;margin-bottom:6px}
    .quote small{color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:9px 12px;border-radius:999px;background:#eef5ff;border:1px solid #d6e4fb;color:#1d4f9d;font-size:13px
    }
    .timeline{
      list-style:none;margin:0;padding:0;display:grid;gap:12px
    }
    .timeline li{padding:16px 18px;display:flex;gap:14px;align-items:flex-start}
    .timeline .dot{width:12px;height:12px;border-radius:50%;background:var(--primary);margin-top:7px;box-shadow:0 0 0 5px #e7f0ff}
    .pricebox{padding:20px}
    .pricebox .big{font-size:30px;font-weight:900;color:var(--primary)}
    .pricebox p{margin:6px 0 0;color:var(--muted)}
    .articles a{display:block;padding:16px 18px;border-radius:18px;background:#fff;border:1px solid var(--line);color:var(--text)}
    .articles a:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .formbox form{display:grid;gap:14px}
    .fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:grid;gap:8px;font-weight:700;font-size:14px}
    input,select,textarea{
      width:100%;padding:13px 14px;border:1px solid #cad7eb;border-radius:14px;background:#fff;color:var(--text);font:inherit
    }
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:12px;padding:28px 0 24px;background:#0c2348;color:#d8e5ff
    }
    .footer a{color:#cbe2ff}
    .footer h2,.footer h3,.footer p,.footer li,.footer small{color:#d8e5ff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}
    .footer .brand span,.footer .muted{color:#b9cae8}
    .footer .links{display:flex;flex-wrap:wrap;gap:12px}
    .footer .links a{background:rgba(255,255,255,.08);padding:8px 12px;border-radius:999px}
    .float{
      position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float a,.float button{
      width:48px;height:48px;border:0;border-radius:16px;background:linear-gradient(135deg,var(--primary),#2683ff);
      color:#fff;box-shadow:0 12px 24px rgba(14,91,215,.22);display:grid;place-items:center;cursor:pointer
    }
    .wechat{
      position:fixed;left:18px;bottom:18px;z-index:60;
      width:280px;max-width:calc(100vw - 36px);background:#fff;border:1px solid var(--line);
      border-radius:18px;box-shadow:var(--shadow2);overflow:hidden
    }
    .wechat header{padding:14px 16px;background:#eff5ff;font-weight:800;color:var(--primary2)}
    .wechat .box{padding:14px 16px;display:flex;gap:14px;align-items:center}
    .wechat img{width:88px;height:88px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .wechat p{margin:0;color:var(--muted);font-size:13px}
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}
    .split-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .split-images img,.banner-row img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow2)}
    .banner-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .mobile-only{display:none}
    .compare table{min-width:900px}
    .scroll-x{overflow-x:auto}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.workflow,.footer-grid,.flex-two{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:20px;right:20px;top:72px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow2);flex-direction:column;align-items:flex-start
      }
      .nav{position:relative}
      .fields,.hero-points,.stat-grid,.banner-row,.split-images{grid-template-columns:1fr}
      .wechat{width:min(280px,calc(100vw - 36px))}
    }
    @media (max-width: 640px){
      .hero-main,.hero-side,.card,.panel,.pricebox,.formbox,.compare{border-radius:18px}
      .hero-main{padding:24px}
      .section{padding:18px 0}
      .hero-actions .btn{width:100%}
      .mobile-only{display:block}
      .desktop-only{display:none}
      .float{right:12px;bottom:12px}
      .wechat{left:12px;bottom:12px}
      .compare table{min-width:820px}
    }