:root{
      --bg:#f7f5ef;
      --bg2:#eef3fb;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#64748b;
      --line:#e5e7eb;
      --primary:#2563eb;
      --primary2:#7c3aed;
      --accent:#10b981;
      --warm:#f59e0b;
      --shadow:0 18px 45px rgba(31,41,55,.08);
      --radius:22px;
      --radius-sm:16px;
      --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 top left, rgba(124,58,237,.08), transparent 30%),
        radial-gradient(circle at top right, rgba(37,99,235,.08), transparent 24%),
        linear-gradient(180deg,var(--bg),#fff 30%,#f8fafc 100%);
      line-height:1.7;
    }
    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;
      backdrop-filter: blur(14px);
      background:rgba(255,255,255,.8);
      border-bottom:1px solid rgba(229,231,235,.8);
    }
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
    .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:4px;box-shadow:0 10px 20px rgba(37,99,235,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:#334155;padding:8px 0;position:relative}
    .nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.25s}
    .nav a:hover::after,.nav a.active::after{width:100%}
    .home-link{display:inline-flex;align-items:center;gap:8px}
    .hero{
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:22px;
      align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.case-card,.service-card,.step-card,.article-card,.form-card,.compare-card,.tag-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(229,231,235,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px; position:relative; overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;right:-80px;top:-80px;background:radial-gradient(circle, rgba(37,99,235,.16), transparent 70%)}
    .hero-main::after{width:180px;height:180px;left:-70px;bottom:-70px;background:radial-gradient(circle, rgba(124,58,237,.14), transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(90deg,rgba(37,99,235,.12),rgba(124,58,237,.12));color:#1d4ed8;font-weight:600;font-size:13px}
    h1{font-size:clamp(30px,5vw,56px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.03em}
    .lead{font-size:16px;color:var(--muted);max-width:62ch;margin:0}
    .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:12px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;font-size:14px;transition:.25s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 30px rgba(37,99,235,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .metric{background:linear-gradient(180deg,#fff,rgba(248,250,252,.92));border:1px solid var(--line);border-radius:18px;padding:16px;min-height:96px}
    .metric strong{display:block;font-size:24px;line-height:1.1}
    .metric span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
    .hero-side{padding:22px;display:grid;gap:14px}
    .side-block{padding:16px;border-radius:18px;background:linear-gradient(180deg,rgba(37,99,235,.06),rgba(124,58,237,.04));border:1px solid rgba(37,99,235,.12)}
    .side-block h3{margin:0 0 8px;font-size:16px}
    .side-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .side-list li{display:flex;gap:10px;align-items:flex-start;color:#334155;font-size:14px}
    .dot{width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));margin-top:7px;flex:0 0 auto}
    .ticker{display:flex;flex-wrap:wrap;gap:8px}
    .chip{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#334155}
    section{padding:18px 0}
    .section-card{padding:26px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);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}
    .info-card,.service-card,.review-card,.case-card,.article-card,.compare-card,.form-card{padding:20px}
    .info-card h3,.service-card h3,.review-card h3,.case-card h3,.article-card h3,.compare-card h3{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted)}
    .tag-card{padding:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:linear-gradient(180deg,#fff,#f8fafc);border:1px solid var(--line);color:#334155;font-size:13px}
    .services .service-card{height:100%}
    .service-card ul,.case-card ul,.compare-card ul{margin:12px 0 0;padding-left:18px;color:#334155}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step-card{padding:18px;position:relative}
    .step-no{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(124,58,237,.12));color:#1d4ed8;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #eef2f7;text-align:left;vertical-align:top}
    th{background:#f8fafc;font-size:14px;color:#334155}
    td{font-size:14px;color:#334155}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:rgba(16,185,129,.12);color:#047857;font-weight:700;font-size:12px}
    .rating{display:flex;gap:6px;color:#f59e0b;font-size:18px}
    .reviews .review-card p{margin:10px 0 0;color:#334155}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:110px 1fr;gap:16px;align-items:start;padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fafc);border:1px solid var(--line)}
    .timeline-item strong{display:block;color:#0f172a}
    .faq{display:grid;gap:12px}
    .faq-item summary{
      list-style:none;cursor:pointer;padding:18px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 18px 18px;color:#334155}
    .faq-icon{font-size:20px;color:#64748b;transition:.2s}
    details[open] .faq-icon{transform:rotate(45deg)}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card .meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px}
    .article-card .thumb{
      border-radius:16px;overflow:hidden;margin-bottom:14px;border:1px solid var(--line);
      aspect-ratio: 16 / 9; background:linear-gradient(135deg,rgba(37,99,235,.08),rgba(124,58,237,.08))
    }
    .article-card .thumb img{width:100%;height:100%;object-fit:cover}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#334155}
    input,select,textarea{
      width:100%;padding:13px 14px;border:1px solid #dbe2ea;border-radius:14px;background:#fff;color:var(--text);
      font:inherit;outline:none;transition:border .2s,box-shadow .2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(37,99,235,.55);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
    .footer{
      margin-top:14px;padding:26px 0 34px;background:linear-gradient(180deg,#f8fafc,#eef2ff);
      border-top:1px solid rgba(229,231,235,.9);color:#1f2937
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px}
    .footer h3{margin:0 0 12px}
    .footer a{color:#1d4ed8}
    .footer small,.footer p{color:#334155}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footbar{margin-top:18px;padding-top:16px;border-top:1px solid #dde3ea;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#475569;font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:54px;height:54px;border-radius:18px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 34px rgba(37,99,235,.25);cursor:pointer
    }
    .kefu-panel{
      position:fixed;right:16px;bottom:84px;z-index:59;width:min(300px, calc(100vw - 32px));
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);
      padding:14px;display:none
    }
    .kefu-panel.show{display:block}
    .kefu-panel img{border-radius:16px;border:1px solid var(--line)}
    .mini-note{font-size:13px;color:var(--muted);margin-top:8px}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .scroll-reveal.in{opacity:1;transform:none}
    .comparison-highlight{border:1px solid rgba(37,99,235,.22);background:linear-gradient(180deg,rgba(37,99,235,.06),rgba(255,255,255,.92))}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.articles,.footer-grid,.steps,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .section-head{flex-direction:column;align-items:flex-start}
      .timeline-item{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav{
        display:none;position:absolute;left:16px;right:16px;top:72px;padding:14px;background:#fff;border:1px solid var(--line);
        border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start
      }
      .nav.open{display:flex}
      .site-header{position:sticky}
    }