:root{--bg:#f6f7fb;--card:#ffffff;--card2:#fff7ee;--text:#172033;--muted:#5f697d;--line:#e7eaf1;--brand:#ff4d5a;--brand2:#5b7cff;--brand3:#11b3a8;--shadow:0 18px 50px rgba(28,40,78,.08);--radius:22px}
    *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#fff 0%,#f7f8fc 32%,#f4f6fb 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:40;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid rgba(231,234,241,.8)}
    .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}
    .brand strong{font-size:18px;letter-spacing:.5px}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px 14px;align-items:center}
    .nav-links a{font-size:14px;color:#2b3550;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a:focus{background:#eef2ff;color:#2230a8}
    .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;cursor:pointer;transition:.25s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff8a00);color:#fff;box-shadow:0 14px 30px rgba(255,77,90,.24)}
    .btn-secondary{background:#fff;color:#1d2740;border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:14px}
    .menu-toggle span{display:block;width:18px;height:2px;background:#23304a;margin:4px auto;border-radius:2px}
    .hero{position:relative;overflow:hidden;padding:34px 0 18px}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(8px);opacity:.9}
    .hero::before{width:240px;height:240px;background:radial-gradient(circle, rgba(255,77,90,.18), transparent 68%);right:-30px;top:-40px}
    .hero::after{width:300px;height:300px;background:radial-gradient(circle, rgba(91,124,255,.16), transparent 68%);left:-60px;bottom:0}
    .hero-grid{display:grid;grid-template-columns:1.3fr .9fr;gap:24px;align-items:stretch}
    .hero-card,.panel,.section-card,.quote-card,.faq-card,.form-card,.testimonial,.article-card,.price-card,.compare-card{background:rgba(255,255,255,.92);border:1px solid rgba(231,234,241,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff2f2;color:#b31c2b;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,4.4vw,54px);line-height:1.05}
    .lead{color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
    .hero-points div{padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line)}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;color:var(--muted);font-size:14px}
    .hero-links a{color:#2940c5}
    .hero-aside{display:grid;gap:14px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric{padding:18px}
    .metric b{display:block;font-size:26px;margin-bottom:8px}
    .metric span{color:var(--muted);font-size:13px;line-height:1.5}
    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:clamp(22px,2.6vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:65ch;line-height:1.7}
    .section-card{padding:24px}
    .tag-cloud,.badge-row{display:flex;flex-wrap:wrap;gap:10px}
    .tag,.badge{padding:9px 12px;border-radius:999px;background:#f6f8ff;border:1px solid #dde3ff;color:#24315a;font-size:13px}
    .service-grid,.feature-grid,.case-grid,.testi-grid,.article-grid,.network-grid,.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .service-card,.feature-card,.case-card,.testimonial,.article-card,.price-card,.compare-card{padding:20px}
    .service-card h3,.feature-card h3,.case-card h3,.testimonial h3,.article-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.feature-card p,.case-card p,.testimonial p,.article-card p,.price-card p{margin:0;color:var(--muted);line-height:1.75}
    .step-list{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px}
    .step{padding:16px 14px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);min-height:132px}
    .step b{display:inline-flex;width:32px;height:32px;border-radius:10px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand2),var(--brand3));color:#fff;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:13px;line-height:1.65}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;background:#fff;min-width:780px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7f9ff}
    .highlight{color:#0a6a67;font-weight:700}
    details{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden}
    details+details{margin-top:12px}
    summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:12px}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"＋";color:var(--brand2);font-size:20px}
    details[open] summary::after{content:"－"}
    details .answer{padding:0 18px 16px;color:var(--muted);line-height:1.75}
    .pricing-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .price-card .price{font-size:34px;font-weight:800;margin:14px 0 8px}
    .price small{font-size:14px;color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    input,select,textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#92a4ff;box-shadow:0 0 0 4px rgba(91,124,255,.12)}
    .footer{margin-top:18px;padding:24px 0 30px;background:#10192e;color:#dbe4ff}
    .footer a{color:#ffffff}
    .footer .muted{color:#aebae0}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer-card{padding:18px;border-radius:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08)}
    .floating{position:fixed;right:18px;bottom:18px;z-index:50;display:flex;flex-direction:column;gap:10px}
    .float-btn{width:50px;height:50px;border-radius:16px;border:0;background:linear-gradient(135deg,var(--brand2),var(--brand));color:#fff;box-shadow:0 14px 30px rgba(17,25,45,.2);display:grid;place-items:center;cursor:pointer}
    .top-btn{background:#fff;color:#22304e;border:1px solid var(--line)}
    .reveal{opacity:0;transform:translateY(16px);transition:.65s ease}
    .reveal.show{opacity:1;transform:none}
    .note{font-size:13px;color:var(--muted);line-height:1.6}
    .kefu{display:grid;grid-template-columns:132px 1fr;gap:14px;align-items:center}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .service-network{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .chip{padding:12px 14px;border-radius:16px;background:linear-gradient(180deg,#fff,#f7f8ff);border:1px solid var(--line);text-align:center}
    .mini-list{display:grid;gap:10px;margin-top:14px}
    .mini-list div{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:14px;background:#f8faff;border:1px solid var(--line);font-size:14px}
    @media (max-width: 980px){
      .hero-grid,.service-grid,.feature-grid,.case-grid,.testi-grid,.article-grid,.network-grid,.compare-grid,.pricing-grid,.footer-grid{grid-template-columns:1fr}
      .step-list{grid-template-columns:repeat(2,minmax(0,1fr))}
      .service-network{grid-template-columns:repeat(2,minmax(0,1fr))}
      .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)}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .menu-toggle{display:inline-block}
      .nav{position:relative}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 20px,1180px)}
      .hero-card,.section-card{padding:18px}
      .hero-points,.metric-grid,.form-grid,.kefu{grid-template-columns:1fr}
      .step-list{grid-template-columns:1fr}
      .service-network{grid-template-columns:1fr}
      .brand strong{font-size:16px}
    }