:root{
      --bg:#f5f7fb;
      --surface:#ffffff;
      --surface-2:#f2f6ff;
      --line:#dbe3f0;
      --text:#132033;
      --muted:#5d6b83;
      --brand:#2563eb;
      --brand-2:#12b981;
      --brand-3:#ffb020;
      --shadow:0 18px 48px rgba(19,32,51,.08);
      --radius:20px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#eef4ff 0,#f5f7fb 35%,#f7f8fc 100%);color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(245,247,251,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,227,240,.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;object-fit:contain}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;line-height:1.2}
    .brand-text span{display:block;font-size:.86rem;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}
    .nav-links a{padding:8px 12px;border-radius:999px;color:#28405f;font-size:.95rem}
    .nav-links a:hover{background:#e9f1ff;color:#1246a5}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s ease;box-shadow:none}
    .btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(37,99,235,.12)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#4f8cff);color:#fff}
    .btn-light{background:#fff;color:#17304f;border-color:var(--line)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    main{display:block}
    section{padding:34px 0}
    .hero{padding:38px 0 24px;position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}
    .hero::before{width:260px;height:260px;background:rgba(37,99,235,.12);top:-90px;right:-60px}
    .hero::after{width:180px;height:180px;background:rgba(18,185,129,.12);bottom:-50px;left:8%}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch}
    .hero-card,.glass-card,.panel{background:rgba(255,255,255,.82);backdrop-filter:blur(8px);border:1px solid rgba(219,227,240,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eef4ff;color:#1d4ed8;border:1px solid #d7e5ff;padding:8px 12px;border-radius:999px;font-size:.88rem;font-weight:700}
    h1{margin:14px 0 12px;font-size:clamp(2rem,4vw,3.7rem);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:1.05rem;max-width:64ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
    .mini{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f8fbff,#eef4ff);border:1px solid #e1e9f7}
    .mini strong{display:block;font-size:1.02rem}
    .mini span{color:var(--muted);font-size:.92rem}
    .hero-side{display:grid;gap:16px}
    .stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid #e4ecf8;transition:transform .2s ease, box-shadow .2s ease}
    .stat:hover{transform:translateY(-3px);box-shadow:0 16px 30px rgba(19,32,51,.08)}
    .stat strong{display:block;font-size:1.55rem;color:#17304f}
    .stat span{color:var(--muted);font-size:.92rem}
    .quote{padding:20px}
    .quote h3{margin:0 0 10px;font-size:1.08rem}
    .quote p{margin:0;color:var(--muted)}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:clamp(1.45rem,2.5vw,2.1rem)}
    .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}
    .card{padding:22px;border-radius:20px;background:var(--surface);border:1px solid var(--line);box-shadow:0 10px 22px rgba(19,32,51,.04);transition:transform .22s ease, box-shadow .22s ease}
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#edf4ff;border:1px solid #d9e7ff;color:#1641a0;font-size:.9rem}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:20px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid var(--line);position:relative}
    .step strong{display:block;font-size:1.05rem;margin-bottom:8px}
    .step small{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:#dbeafe;color:#1d4ed8;font-weight:800;margin-bottom:12px}
    .compare{overflow:auto;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid #eef2f7;text-align:left;vertical-align:top}
    th{background:#f7fbff;color:#17304f;font-size:.95rem}
    td{color:#31455f}
    .rating{font-weight:800;color:#0f766e}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline .card{position:relative;overflow:hidden}
    .timeline .card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--brand-3))}
    .service-flow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .service-list{display:grid;gap:12px}
    .service-item{display:flex;gap:12px;padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .service-item b{display:block;margin-bottom:4px}
    .service-item span{color:var(--muted);font-size:.94rem}
    .case-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .case-grid .card h3,.review-grid .card h3,.article-grid .card h3{margin:12px 0 8px;font-size:1.04rem}
    .thumb{border-radius:16px;overflow:hidden;border:1px solid #e8eef8;background:#f6f9ff}
    .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .form-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    label{font-size:.95rem;font-weight:700;color:#26415e}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #cfd9ea;background:#fff;color:var(--text);font:inherit;outline:none}
    input:focus,select:focus,textarea:focus{border-color:#7ca7ff;box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    textarea{min-height:120px;resize:vertical}
    .faq{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 8px 18px rgba(19,32,51,.04)}
    summary{list-style:none;padding:16px 18px;font-weight:700;cursor:pointer}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 16px;color:var(--muted)}
    .gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-meta,.meta-row{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:.9rem}
    .pill{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eef4ff;color:#1d4ed8}
    .footer{padding:24px 0 34px;border-top:1px solid var(--line);background:#f8fbff;color:#22354d}
    .footer a{color:#123f96}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid #dce5f2}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{width:48px;height:48px;border-radius:50%;border:none;display:grid;place-items:center;background:#fff;box-shadow:var(--shadow);color:#16345f;cursor:pointer}
    .floating .primary{background:linear-gradient(135deg,var(--brand),#4f8cff);color:#fff}
    .mobile-menu{display:none}
    .reveal{opacity:0;transform:translateY(14px);transition:.7s ease}
    .reveal.visible{opacity:1;transform:none}
    .company-line{color:var(--muted);font-size:.95rem}
    .links-inline{display:flex;flex-wrap:wrap;gap:10px}
    .links-inline a{color:#1d4ed8}
    @media (max-width: 1024px){
      .hero-grid,.form-wrap,.service-flow,.footer-grid{grid-template-columns:1fr}
      .grid-3,.case-grid,.review-grid,.article-grid,.gallery,.steps,.timeline{grid-template-columns:repeat(2,1fr)}
      .hero-points,.stats{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 768px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 16px}
      .mobile-menu.open{display:block}
      .mobile-menu .links-inline{flex-direction:column;align-items:flex-start}
      .grid-3,.grid-2,.case-grid,.review-grid,.article-grid,.gallery,.steps,.timeline,.hero-points,.stats{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .hero-card{padding:22px}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
    }