:root{
      --bg:#f6f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5e6a7f;
      --line:#dde4f0;
      --brand:#ff4d6d;
      --brand2:#6c5ce7;
      --brand3:#00b8d9;
      --gold:#ffb703;
      --shadow:0 18px 45px rgba(23,32,51,.08);
      --shadow2:0 12px 28px rgba(108,92,231,.14);
      --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, #fff 0, #f7f8fd 36%, #eef3ff 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(246,247,251,.84);backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid rgba(221,228,240,.75)}
    .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;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:0 10px 24px rgba(0,0,0,.06)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2a3550;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:#fff;color:var(--brand);box-shadow:0 8px 20px rgba(255,77,109,.09)}
    .hero{padding:34px 0 12px}
    .hero-grid{display:grid;grid-template-columns:1.24fr .76fr;gap:20px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.quote-card,.form-card,.faq-card,.article-card,.panel-card,.compare-card,.info-card,.timeline-card{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(255,255,255,.92));border:1px solid rgba(221,228,240,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-side::before,.section-card::before{content:"";position:absolute;inset:auto -40px -50px auto;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle, rgba(255,77,109,.16), transparent 65%);pointer-events:none}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(135deg,rgba(255,77,109,.12),rgba(108,92,231,.10));color:#b13245;font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,4.3vw,56px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:62ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 18px;border-radius:14px;font-weight:700;transition:.22s;border:1px solid transparent}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff;box-shadow:0 14px 28px rgba(255,77,109,.26)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:rgba(108,92,231,.35);transform:translateY(-2px)}
    .hero-side{padding:22px;position:relative;overflow:hidden}
    .hero-side h2{margin:0 0 10px;font-size:22px}
    .hero-side .home-link{display:inline-flex;align-items:center;gap:8px;color:#0f5bd6;font-weight:700;margin:8px 0 14px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
    .stat{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8faff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:22px;color:#14213d}
    .stat span{display:block;margin-top:6px;font-size:13px;color:var(--muted);line-height:1.5}
    .tag-cloud,.keyword-bar{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#31405e}
    .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}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .section-card{padding:24px;position:relative;overflow:hidden}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);transition:.22s;box-shadow:0 8px 18px rgba(23,32,51,.04)}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow2)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .icon-badge{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,77,109,.13),rgba(108,92,231,.13));color:#7a2850;font-weight:800;margin-bottom:12px}
    .flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#fafcff);border:1px solid var(--line);position:relative}
    .step strong{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand2),var(--brand3));color:#fff;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f8faff;color:#23304a;font-size:14px}
    td{color:var(--muted)}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .star{color:#ff9f1c;font-size:20px;letter-spacing:2px}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:110px 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline-item b{color:#183153}
    .compare-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .quote{display:grid;gap:10px}
    .quote .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#33415c;font-weight:700}
    .quote p{margin:0;color:var(--muted);line-height:1.8}
    .article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .article-list a{display:block;padding:16px 18px;border-radius:16px;border:1px solid var(--line);background:#fff;color:#23304a;transition:.2s}
    .article-list a:hover{transform:translateY(-2px);border-color:rgba(108,92,231,.35);box-shadow:0 12px 28px rgba(108,92,231,.10)}
    .faq details{border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden}
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700;color:#1c2740}
    .faq summary::-webkit-details-marker{display:none}
    .faq .ans{padding:0 18px 16px;color:var(--muted);line-height:1.8}
    .form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#23304a}
    input,select,textarea{width:100%;border:1px solid #d8e0ec;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:rgba(108,92,231,.5);box-shadow:0 0 0 4px rgba(108,92,231,.08)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:6px}
    .fine{font-size:13px;color:var(--muted);line-height:1.7}
    .footer{margin-top:18px;padding:26px 0 34px;background:#eef3ff;border-top:1px solid #d9e3f3;color:#20304c}
    .footer a{color:#0f5bd6}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
    .footer small{color:#50607a;line-height:1.7}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 14px;border-radius:14px;background:linear-gradient(135deg,#fff,#f7f8fd);border:1px solid var(--line);box-shadow:var(--shadow);font-weight:700;color:#23304a}
    .float-btn.primary{background:linear-gradient(135deg,var(--brand2),var(--brand3));color:#fff}
    .backtop{display:none}
    .wechat-box{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center}
    .wechat-box img{border-radius:16px;border:1px solid var(--line);background:#fff;padding:6px}
    .service-map{display:flex;flex-wrap:wrap;gap:10px}
    .service-map .tag{background:linear-gradient(180deg,#fff,#f8fbff)}
    .image-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .image-row img,.square-row img{border-radius:18px;border:1px solid var(--line);background:#fff;padding:6px}
    .square-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .case-card{display:grid;gap:12px}
    .case-card strong{font-size:16px}
    .mini-note{padding:12px 14px;border-radius:14px;background:linear-gradient(135deg,rgba(255,183,3,.13),rgba(255,77,109,.10));color:#7b4f00;font-size:13px;line-height:1.7}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.compare-grid,.footer-grid,.grid-3,.grid-2,.flow,.article-list,.image-row,.square-row{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .timeline-item{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:0;right:0;top:68px;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);padding:14px 16px;box-shadow:0 18px 30px rgba(0,0,0,.06)}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .hero-main{padding:24px}
      .mobile-only{display:inline-flex}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 20px))}
      .hero{padding-top:18px}
      h1{font-size:28px}
      .hero p{font-size:15px}
      .stat-grid,.form{grid-template-columns:1fr}
      .cta-row{flex-direction:column;align-items:stretch}
      .btn{width:100%}
      .floating{right:10px;bottom:10px}
      .float-btn{padding:11px 12px}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}