:root{
      --bg:#f5f8fb;
      --panel:#ffffff;
      --panel-soft:#eef7fb;
      --line:#d7e5ef;
      --text:#183042;
      --muted:#5e7284;
      --brand:#1597c3;
      --brand2:#2f7be5;
      --accent:#13b8a6;
      --shadow:0 18px 50px rgba(17,55,87,.08);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      background:
        radial-gradient(circle at top left, rgba(21,151,195,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(19,184,166,.10), transparent 22%),
        linear-gradient(180deg, #f8fbfd 0%, #eef5fa 100%);
      color:var(--text);
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(248,251,253,.88);
      border-bottom:1px solid rgba(215,229,239,.8);
    }
    .topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(15,55,87,.08)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
    nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:#2f4d61;padding:8px 10px;border-radius:999px;transition:.2s ease}
    nav a:hover{background:#e9f6fb;color:#0e6c8f}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:.22s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 24px rgba(21,151,195,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(21,151,195,.28)}
    .btn-ghost{background:#fff;color:#1b4d69;border:1px solid var(--line)}
    .btn-ghost:hover{border-color:#b9d7e8;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .85fr;gap:22px;align-items:stretch
    }
    .hero-card{
      position:relative;overflow:hidden;border-radius:30px;background:
      linear-gradient(135deg, rgba(21,151,195,.96), rgba(47,123,229,.96));
      color:#fff;padding:34px;box-shadow:var(--shadow);
      border:1px solid rgba(255,255,255,.12)
    }
    .hero-card::before,.hero-card::after{
      content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.10);filter:blur(4px)
    }
    .hero-card::before{width:220px;height:220px;top:-90px;right:-60px}
    .hero-card::after{width:180px;height:180px;bottom:-70px;left:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.18);padding:7px 12px;border-radius:999px;font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero-card p{margin:0;color:rgba(255,255,255,.9);max-width:54ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .badge{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);font-size:13px}
    .hero-side{
      display:grid;gap:16px
    }
    .side-card{
      background:rgba(255,255,255,.86);border:1px solid rgba(215,229,239,.9);border-radius:26px;padding:22px;box-shadow:var(--shadow)
    }
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .stat{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f7fbfe);border:1px solid var(--line)}
    .stat strong{display:block;font-size:26px;color:#0d6b89}
    .stat span{display:block;margin-top:4px;color:var(--muted);font-size:13px}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:60ch}
    .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:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
      padding:22px;box-shadow:0 10px 28px rgba(16,49,77,.05);transition:.22s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(16,49,77,.08)}
    .card h3{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted)}
    .icon-dot{width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg,#dff5fb,#e8f0ff);display:flex;align-items:center;justify-content:center;color:#0f7292;font-weight:800;margin-bottom:14px}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#eef7fb;border:1px solid #d7e9f1;font-size:13px;color:#24526a}
    .timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:70px 1fr;gap:14px;align-items:start;padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .step .num{width:54px;height:54px;border-radius:18px;background:linear-gradient(135deg,#12a7c5,#2f7be5);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:22px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid #edf2f5;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f5fbfe;color:#0f4f6a}
    .scorebox{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}
    .score{font-size:44px;font-weight:900;color:#0f7798}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{padding:22px;border-radius:24px;background:linear-gradient(180deg,#fff,#f8fcff);border:1px solid var(--line)}
    .quote .who{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .stars{color:#f4b400;letter-spacing:1px}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:14px 16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .article-item span{color:var(--muted);font-size:13px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px}
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;font-weight:700;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:12px 0 0;color:var(--muted)}
    .form{
      display:grid;gap:14px
    }
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{font-size:13px;font-weight:700;color:#24485f;display:block;margin-bottom:8px}
    input,select,textarea{
      width:100%;border:1px solid #cfe0ea;background:#fff;border-radius:14px;padding:13px 14px;
      color:var(--text);font:inherit;outline:none;transition:.2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#86cce3;box-shadow:0 0 0 4px rgba(21,151,195,.10)}
    .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    .contact-box{display:grid;gap:12px}
    .qrcode{width:160px;border-radius:18px;border:1px solid var(--line);background:#fff;padding:10px}
    footer{
      margin-top:18px;padding:26px 0 34px;border-top:1px solid var(--line);
      background:#f3f8fb;color:#26475b
    }
    footer a{color:#135f82}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .mobile-panel{display:none}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;
      box-shadow:0 10px 24px rgba(16,49,77,.10);display:flex;align-items:center;justify-content:center;cursor:pointer
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.5s ease}
    .reveal.show{opacity:1;transform:none}
    .mini-note{font-size:13px;color:var(--muted)}
    @media (max-width: 1080px){
      .hero-grid,.grid-3,.review-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
    }
    @media (max-width: 860px){
      nav{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel{
        display:none;padding:0 0 16px
      }
      .mobile-panel.open{display:block}
      .mobile-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
      .mobile-links a{background:#fff;border:1px solid var(--line);padding:11px 12px;border-radius:14px;text-align:center}
      .form-grid,.grid-2,.stat-grid{grid-template-columns:1fr}
      .scorebox{grid-template-columns:1fr}
      .hero-card{padding:26px}
    }