:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel2:#f3f6ff;
      --text:#172033;
      --muted:#5e6b86;
      --line:#dbe3f1;
      --brand:#4f6df5;
      --brand2:#8d5cf6;
      --accent:#12b3a8;
      --warm:#ffb454;
      --shadow:0 18px 45px rgba(39,58,112,.10);
      --shadow2:0 10px 26px rgba(79,109,245,.16);
      --radius:20px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(79,109,245,.12), transparent 32%),
      radial-gradient(circle at 80% 0%, rgba(141,92,246,.14), transparent 24%),
      linear-gradient(180deg, #f7f9ff 0%, #f8fbff 35%, #f6f8fc 100%);
      color:var(--text);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(247,249,255,.84);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,227,241,.7)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 22px rgba(79,109,245,.12)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    nav ul{display:flex;flex-wrap:wrap;gap:14px;list-style:none;padding:0;margin:0;align-items:center}
    nav a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:10px}
    nav a:hover, nav a:focus-visible{background:#eef3ff;color:var(--text);outline:none}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:14px;padding:12px 16px;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:rgba(79,109,245,.35);box-shadow:var(--shadow)}
    main{padding:24px 0 12px}
    section{padding:20px 0}
    .hero{padding-top:18px}
    .hero-card{position:relative;overflow:hidden;background:
      linear-gradient(135deg, rgba(255,255,255,.94), rgba(245,248,255,.92));
      border:1px solid rgba(219,227,241,.9);border-radius:28px;padding:34px;box-shadow:var(--shadow)
    }
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none}
    .hero-card:before{width:220px;height:220px;background:radial-gradient(circle, rgba(79,109,245,.22), transparent 68%);right:-40px;top:-60px}
    .hero-card:after{width:180px;height:180px;background:radial-gradient(circle, rgba(18,179,168,.18), transparent 68%);left:-30px;bottom:-60px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:22px;align-items:stretch;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#3653c7;background:#eef3ff;border:1px solid #dce5ff;padding:8px 12px;border-radius:999px}
    h1{font-size:clamp(30px,5vw,56px);line-height:1.08;margin:16px 0 14px}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);margin:0 0 20px;max-width:54ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}
    .metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .metric{background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line);border-radius:18px;padding:16px}
    .metric b{display:block;font-size:22px}
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.45}
    .hero-side{display:grid;gap:14px}
    .hero-panel{background:linear-gradient(180deg,#101a35,#16254b);color:#fff;border-radius:24px;padding:22px;box-shadow:var(--shadow)}
    .hero-panel h2{font-size:20px;margin:0 0 10px}
    .hero-panel p,.hero-panel li{color:rgba(255,255,255,.82);line-height:1.7}
    .hero-panel ul{margin:0;padding-left:18px;display:grid;gap:8px}
    .tag-cloud,.chip-row{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#30405f;font-size:13px}
    .chip.primary{background:linear-gradient(135deg,rgba(79,109,245,.12),rgba(141,92,246,.12));border-color:#d5ddff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:60ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 8px 20px rgba(20,35,80,.05);transition:.25s ease}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,rgba(79,109,245,.15),rgba(18,179,168,.15));display:grid;place-items:center;margin-bottom:12px;color:#3554cc;font-weight:800}
    .timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:start}
    .step .num{width:72px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;text-align:center;padding:16px 10px}
    .step .content{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:880px}
    th,td{padding:15px 14px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f4f7ff;color:#203050;font-size:14px}
    td{color:#3a4761;line-height:1.7}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:#eef3ff;color:#3554cc;font-size:12px;font-weight:700}
    .highlight{background:linear-gradient(135deg,rgba(79,109,245,.08),rgba(18,179,168,.08));border-color:#d8e1ff}
    .reviews .card{display:grid;gap:12px}
    .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800}
    .rating{color:#f5a623;font-size:14px;letter-spacing:1px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px}
    details+details{margin-top:12px}
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";float:right;color:var(--brand);font-weight:800}
    details[open] summary:after{content:"−"}
    .articles,.links-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .article-item span{color:var(--muted);font-size:13px;white-space:nowrap}
    .article-item b{display:block;margin-bottom:6px}
    .form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#2a3755}
    .field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:#fff;color:var(--text);font:inherit;outline:none}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(79,109,245,.55);box-shadow:0 0 0 4px rgba(79,109,245,.08)}
    textarea{min-height:120px;resize:vertical}
    footer{margin-top:8px;background:#0f1730;color:#d6def7}
    footer a{color:#ffffff}
    .footer-inner{padding:26px 0}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr .95fr;gap:18px}
    .footer-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:18px}
    .footer-card h3{margin:0 0 10px;color:#fff}
    .footer-card p,.footer-card li{color:#d6def7;line-height:1.75}
    .footer-card ul{margin:0;padding-left:18px}
    .footer-bottom{padding:14px 0 20px;color:#9fb0de;border-top:1px solid rgba(255,255,255,.08);font-size:13px}
    .float-tools{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-tools a,.float-tools button{width:48px;height:48px;border-radius:16px;border:none;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;box-shadow:var(--shadow2);cursor:pointer}
    .float-kefu{position:fixed;left:16px;bottom:16px;z-index:60}
    .kefu-box{display:none;position:absolute;left:0;bottom:58px;width:240px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
    .kefu-box img{border-radius:14px;border:1px solid var(--line)}
    .kefu-box p{margin:10px 0 0;color:var(--muted);line-height:1.7;font-size:13px}
    .fade-in{opacity:0;transform:translateY(16px);transition:.6s ease}
    .fade-in.show{opacity:1;transform:translateY(0)}
    .subgrid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .mini-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .mini-list li{padding:12px 14px;border-radius:14px;background:#f8faff;border:1px solid #edf1fb;color:#3a4761}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.footer-grid,.subgrid,.grid-2{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 860px){
      nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;box-shadow:var(--shadow)}
      nav.open{display:block}
      nav ul{flex-direction:column;align-items:flex-start}
      .menu-btn{display:inline-flex}
      .nav-cta .btn-ghost{display:none}
      .hero-card{padding:22px}
      .metric-row{grid-template-columns:1fr}
      .hero-actions{flex-direction:column}
      .article-item{flex-direction:column}
    }