:root{--bg:#f6f8fc;--card:#ffffff;--text:#172033;--muted:#5b667d;--line:#dbe3f1;--brand:#3b82f6;--brand2:#8b5cf6;--accent:#14b8a6;--shadow:0 18px 45px rgba(30,41,59,.08);--radius:22px;--max: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,#eef4ff 0,#f6f8fc 34%,#eef2ff 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(246,248,252,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(219,227,241,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:16px}
    .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:5px;box-shadow:0 8px 20px rgba(59,130,246,.12)}
    .brand-text{display:flex;flex-direction:column;line-height:1.1}
    .brand-text strong{font-size:18px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;padding:10px 12px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:#344055;padding:8px 10px;border-radius:12px;transition:.2s}
    .nav-links a:hover,.nav-links a:focus-visible{background:#edf4ff;color:#153b7a;outline:none}
    .hero{padding:46px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.quote-card,.faq-item,.form-card,.info-card,.review-card,.mini-card,.timeline-item{background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(255,255,255,.92));border:1px solid rgba(219,227,241,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:999px;filter:blur(2px);opacity:.8}
    .hero-main:before{width:240px;height:240px;right:-100px;top:-80px;background:radial-gradient(circle,#8b5cf633,transparent 70%)}
    .hero-main:after{width:180px;height:180px;right:120px;bottom:-90px;background:radial-gradient(circle,#14b8a633,transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#1f4bb8;background:#edf4ff;border:1px solid #d7e5ff;border-radius:999px;padding:8px 12px}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.9;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.2s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 26px rgba(59,130,246,.24)}
    .btn-secondary{background:#fff;border-color:var(--line);color:#1f2b41}
    .btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .point{padding:16px;border-radius:18px;background:rgba(255,255,255,.75);border:1px solid rgba(219,227,241,.9)}
    .point strong{display:block;font-size:22px}
    .point span{font-size:13px;color:var(--muted)}
    .hero-side{padding:20px;display:flex;flex-direction:column;gap:14px}
    .hero-side .mini-card{padding:18px}
    .hero-side h2,.section-title{margin:0 0 10px;font-size:26px}
    .subtle{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 11px;border-radius:999px;background:#f3f7ff;border:1px solid #dbe6ff;color:#27416f;font-size:13px}
    section{padding:18px 0}
    .section-card{padding:24px}
    .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}
    .metric,.service,.review-card,.article-card,.case-card,.support-card,.price-card,.match-card,.step,.info-card,.timeline-item{padding:20px}
    .metric strong{display:block;font-size:30px;margin-bottom:6px}
    .metric span,.service p,.review-card p,.article-card p,.case-card p,.support-card p,.price-card p,.match-card p,.step p,.info-card p,.timeline-item p{color:var(--muted);line-height:1.7;margin:0}
    .service h3,.review-card h3,.article-card h3,.case-card h3,.support-card h3,.price-card h3,.match-card h3,.step h3,.info-card h3,.timeline-item h3{margin:0 0 10px;font-size:18px}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#eff6ff,#eef2ff);color:#2450c8;font-weight:800;margin-bottom:14px}
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative}
    .step .num{position:absolute;right:16px;top:16px;font-size:12px;color:#5f6c86;background:#eef4ff;border-radius:999px;padding:6px 10px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7faff;color:#20314f;font-size:14px}
    td{color:#33415c}
    .compare-score{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:18px}
    .score-badge{padding:14px 16px;border-radius:16px;background:linear-gradient(135deg,#0f172a,#1e3a8a);color:#fff;min-width:180px}
    .score-badge strong{display:block;font-size:28px}
    .accordion{display:grid;gap:12px}
    .faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:700}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .reviews,.articles,.cases,.support-grid,.pricing,.matching,.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #cfd8ea;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none;transition:.2s}
    textarea{min-height:120px;resize:vertical;grid-column:1/-1}
    input:focus,select:focus,textarea:focus{border-color:#7ea3ff;box-shadow:0 0 0 4px rgba(59,130,246,.10)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:6px}
    .footer{margin-top:16px;padding:26px 0 28px;background:#0f172a;color:#dbe4ff}
    .footer a{color:#c7d5ff}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:start}
    .footer small,.footer p{color:#aeb9d6;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:rgba(255,255,255,.04)}
    .float-bar{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .float-btn{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px rgba(59,130,246,.25)}
    .float-service{position:fixed;left:16px;bottom:16px;z-index:60;width:190px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
    .float-service img{width:100%;border-radius:14px;margin-top:10px}
    .fade-up{opacity:0;transform:translateY(18px);transition:.7s ease}
    .fade-up.visible{opacity:1;transform:none}
    .muted-link{color:#2450c8;font-weight:700}
    .list-inline{display:flex;flex-wrap:wrap;gap:10px}
    .list-inline span{padding:8px 10px;border-radius:12px;background:#f5f8ff;border:1px solid #dce6fa;font-size:13px}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.flow,.reviews,.articles,.cases,.support-grid,.pricing,.matching,.timeline,.footer-grid{grid-template-columns:1fr}
      .hero-points,.form-grid{grid-template-columns:1fr 1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:74px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .hero{padding-top:24px}
      .float-service{display:none}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{padding:0 16px}
      .hero-main,.hero-side,.section-card{padding:18px}
      .hero-points,.form-grid{grid-template-columns:1fr}
      h1{font-size:30px}
      .hero-actions,.form-actions{flex-direction:column;align-items:stretch}
      .btn{width:100%}
      .topbar{position:sticky}
    }