:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#eef4ff;
      --text:#172033;
      --muted:#61708a;
      --brand:#246bff;
      --brand-2:#00b7a8;
      --accent:#ff7b54;
      --line:#dbe4f3;
      --shadow:0 18px 40px rgba(25,54,112,.08);
      --shadow-soft:0 10px 24px rgba(25,54,112,.06);
      --radius:18px;
      --radius-lg:28px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:linear-gradient(180deg,#eef5ff 0%,#f8fbff 28%,#f6f8fc 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(246,248,252,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,243,.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 .ai-page-logo{width:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff;padding:6px;box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;line-height:1.2}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px;font-weight:600}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#31415d;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:#eaf1ff;color:var(--brand)}
    .hero{position:relative;overflow:hidden;padding:36px 0 24px}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:999px;filter:blur(4px);opacity:.8;pointer-events:none}
    .hero::before{width:320px;height:320px;background:radial-gradient(circle at 30% 30%, rgba(36,107,255,.18), rgba(36,107,255,0) 65%);right:-90px;top:-60px}
    .hero::after{width:260px;height:260px;background:radial-gradient(circle at 40% 40%, rgba(0,183,168,.18), rgba(0,183,168,0) 65%);left:-80px;bottom:-40px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.form-card,.faq-item,.quote-card,.article-card,.compare-card,.timeline-card,.price-card{background:rgba(255,255,255,.92);border:1px solid rgba(219,228,243,.9);border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#1e5de3;background:#edf4ff;border:1px solid #d7e4ff;padding:8px 12px;border-radius:999px}
    h1{margin:16px 0 14px;font-size:clamp(30px,4.2vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);line-height:1.8;font-size:16px;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.2s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#5d8cff);color:#fff;box-shadow:0 12px 24px rgba(36,107,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{padding:20px;display:grid;gap:14px}
    .mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .mini{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f6f9ff,#fff);border:1px solid #e1e9f7}
    .mini strong{display:block;font-size:22px;margin-bottom:6px}
    .mini span{font-size:13px;color:var(--muted);line-height:1.6}
    .contact-strip{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--muted)}
    .section{padding:20px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:68ch}
    .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{padding:22px}
    .card h3,.panel h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.quote-card p,.article-card p,.timeline-card p{margin:0;color:var(--muted);line-height:1.75}
    .badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .badge{padding:7px 10px;border-radius:999px;background:#f2f6ff;color:#294367;font-size:12px;border:1px solid #e1ebff}
    .panel{padding:22px}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f7fbff);border:1px solid #e0e9f7}
    .stat strong{display:block;font-size:24px;margin-bottom:6px;color:#11326f}
    .stat span{font-size:13px;color:var(--muted);line-height:1.5}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid #e3ebf7;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #edf2fb;font-size:14px;vertical-align:top}
    th{background:#f5f8ff;color:#1b2d4f}
    tr:hover td{background:#fbfdff}
    .compare-badge{display:inline-flex;padding:7px 12px;border-radius:999px;background:#eefaf8;color:#0d6d63;font-weight:700;font-size:12px}
    .step-list,.timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start;padding:18px;border-radius:18px;background:#fff;border:1px solid #e3eaf7}
    .step-num{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#246bff,#5aa1ff);color:#fff;font-weight:800}
    .step h3{margin:0 0 6px;font-size:17px}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;background:#fff;border:0;color:var(--text);font-size:15px;font-weight:700;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px;color:var(--muted);line-height:1.75}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .faq-q{color:var(--brand)}
    .review{display:grid;gap:10px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}
    .stars{color:#ffb400;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card{padding:20px}
    .article-card h3{margin:0 0 10px;font-size:17px}
    .article-card a.more{display:inline-flex;margin-top:14px;color:var(--brand);font-weight:700;font-size:14px}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .form-card{padding:22px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:7px}
    label{font-size:14px;font-weight:700;color:#243554}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #dbe4f3;background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#8ab0ff;box-shadow:0 0 0 4px rgba(36,107,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
    .support-box{display:grid;gap:14px}
    .qrcode{display:flex;gap:14px;align-items:center;padding:16px;border-radius:18px;background:#fff;border:1px solid #e3eaf7}
    .qrcode img{width:110px;height:110px;object-fit:cover;border-radius:16px;border:1px solid #e6edf8;background:#fff}
    .links-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .links-cloud a,.tags a{padding:9px 12px;border-radius:999px;background:#f2f6ff;border:1px solid #e1ebff;color:#294367;font-size:13px}
    .footer{margin-top:18px;background:#162235;color:#d9e3f2}
    .footer .container{padding:22px 0}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .footer a{color:#ffffff}
    .footer .muted{color:#b8c4d8;line-height:1.7}
    .bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:16px;padding-top:16px;font-size:13px;color:#b8c4d8}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),#66a0ff);color:#fff;box-shadow:0 14px 28px rgba(36,107,255,.26);border:0;cursor:pointer}
    .float-link{display:grid;place-items:center;text-align:center;line-height:1.1;padding:10px 12px;border-radius:16px;background:#fff;border:1px solid var(--line);color:var(--text);box-shadow:var(--shadow-soft);font-size:12px;font-weight:700}
    .scroll-top{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}
    .scroll-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.visible{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.form-grid,.footer-grid,.grid-3,.articles,.stats,.grid-2{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 780px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}
      .nav-links.open{display:flex}
      .hero{padding-top:18px}
      .hero-grid,.form-grid,.footer-grid,.grid-3,.articles,.stats,.grid-2{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .section-head{flex-direction:column;align-items:flex-start}
      .mini-grid{grid-template-columns:1fr 1fr}
      table{min-width:900px}
    }
    @media (max-width: 520px){
      .container{width:min(100% - 24px,1180px)}
      .hero-main,.panel,.card,.form-card{padding:18px}
      .mini-grid{grid-template-columns:1fr}
      .step{grid-template-columns:1fr}
      .qrcode{flex-direction:column;align-items:flex-start}
    }