:root{
      --bg:#f6f7fb;
      --bg-2:#eef3ff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5c667a;
      --line:#dfe6f2;
      --brand:#ff4d6d;
      --brand-2:#6c63ff;
      --brand-3:#00c2ff;
      --success:#19a974;
      --warning:#ffb020;
      --shadow:0 18px 50px rgba(23,32,51,.10);
      --radius:22px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,109,.10), transparent 22%),
        radial-gradient(circle at top right, rgba(108,99,255,.12), transparent 24%),
        linear-gradient(180deg, #fff 0%, var(--bg) 18%, #f8f9fd 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .skip{position:absolute;left:-999px;top:auto}
    .skip:focus{left:16px;top:16px;z-index:1000;background:#fff;padding:10px 14px;border-radius:10px;box-shadow:var(--shadow)}
    header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:saturate(160%) blur(16px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(223,230,242,.82);
    }
    .topbar{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;border:1px solid var(--line);padding:4px;box-shadow:0 10px 20px rgba(23,32,51,.06)}
    .brand h2{margin:0;font-size:16px;line-height:1.2}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    nav{display:flex;align-items:center;gap:16px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:var(--text);opacity:.88}
    .nav-links a:hover,.nav-links a:focus{color:var(--brand)}
    .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;font-size:14px;transition:.25s ease;cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff;box-shadow:0 12px 26px rgba(255,77,109,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(255,77,109,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#cfd7e6}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{
      position:relative;overflow:hidden;
      padding:58px 0 26px;
    }
    .hero::before,.hero::after{
      content:"";position:absolute;border-radius:999px;filter:blur(12px);pointer-events:none
    }
    .hero::before{width:280px;height:280px;background:rgba(255,77,109,.12);right:-90px;top:6px}
    .hero::after{width:240px;height:240px;background:rgba(108,99,255,.14);left:-90px;bottom:-40px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.info-card,.review-card,.faq-item,.form-card,.case-card,.article-card,.compare-card{
      background:rgba(255,255,255,.84);border:1px solid rgba(223,230,242,.92);
      box-shadow:var(--shadow);border-radius:var(--radius)
    }
    .hero-copy{padding:28px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff1f5;color:#c92348;border:1px solid #ffd2dc;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.06;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:20px;margin-bottom:4px}
    .mini-stat span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-panel{padding:22px;display:flex;flex-direction:column;gap:14px}
    .hero-panel .panel-title{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .hero-panel .panel-title h3{margin:0;font-size:18px}
    .pill-row{display:flex;flex-wrap:wrap;gap:8px}
    .pill{padding:8px 11px;border-radius:999px;background:#f4f7ff;border:1px solid #e3e8f6;color:#2e3954;font-size:12px;font-weight:700}
    .panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .panel-box{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#fafbff);border:1px solid var(--line)}
    .panel-box strong{display:block;font-size:18px;margin-bottom:6px}
    .panel-box p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.7}
    .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}
    .section-card,.info-card,.review-card,.faq-item,.form-card,.case-card,.article-card,.compare-card{padding:20px}
    .metric strong{display:block;font-size:30px;line-height:1;margin-bottom:8px}
    .metric span{color:var(--muted);line-height:1.6}
    .service-card h3,.case-card h3,.article-card h3,.review-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.case-card p,.article-card p,.review-card p,.section-card p{margin:0;color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 12px;font-size:13px;color:#304057}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fafbff);border:1px solid var(--line)}
    .step b{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand-2),var(--brand-3));color:#fff}
    .step h3{margin:0 0 6px;font-size:16px}
    .step p{margin:0;color:var(--muted);line-height:1.7}
    .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 #edf1f7;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7f9ff;color:#23304a}
    tbody tr:hover{background:#fcfdff}
    .badge{display:inline-flex;align-items:center;gap:6px;background:#eefdf5;color:#116a4a;border:1px solid #cdefdf;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}
    .highlight{background:linear-gradient(135deg,#fff4f7,#f4f6ff);border:1px solid #ffd6e0}
    .quote{font-size:15px;line-height:1.8;color:#38455d}
    .avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800}
    .review-top{display:flex;align-items:center;gap:12px;margin-bottom:10px}
    .stars{color:#ffab00;font-size:16px;letter-spacing:1px}
    details{border-radius:18px}
    details summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;font-weight:700}
    details summary::-webkit-details-marker{display:none}
    details p{margin:12px 0 0;color:var(--muted);line-height:1.75}
    .faq-item{overflow:hidden}
    .faq-item + .faq-item{margin-top:12px}
    .article-list{display:grid;gap:12px}
    .article-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;border-radius:16px;border:1px solid var(--line);background:#fff}
    .article-row span{color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:13px;font-weight:700;color:#2b364d}
    input,select,textarea{
      width:100%;border:1px solid #d9e1ef;border-radius:14px;padding:13px 14px;
      font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#9fb0ff;box-shadow:0 0 0 4px rgba(108,99,255,.10)}
    textarea{min-height:130px;resize:vertical}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:4px}
    footer{
      padding:24px 0 30px;margin-top:8px;
      background:#10192d;color:#eef3ff;border-top:1px solid rgba(255,255,255,.08)
    }
    footer a{color:#dbe6ff}
    footer a:hover{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer-card{padding:18px;border-radius:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
    .footer-links{display:flex;flex-wrap:wrap;gap:12px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.07)}
    .fine{margin-top:14px;color:#b7c4df;font-size:13px;line-height:1.8}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:50;display:flex;flex-direction:column;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;cursor:pointer
    }
    .float-tools a{font-size:12px;font-weight:800;color:var(--brand)}
    .drawer{display:none}
    .mobile-only{display:none}
    .split-images{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .split-images .ai-page-image{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:18px;border:1px solid var(--line);box-shadow:0 14px 28px rgba(23,32,51,.08)}
    .service-network{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .service-network .mini{padding:14px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(180deg,#fff,#f8faff)}
    .service-network .mini strong{display:block;margin-bottom:6px}
    .scroll-animate{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
    .scroll-animate.in-view{opacity:1;transform:translateY(0)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.footer-grid,.service-network{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .drawer{
        display:none;padding:12px 0 16px
      }
      .drawer.open{display:block}
      .drawer .nav-links{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line)}
      .mobile-only{display:block}
      .section-head{flex-direction:column;align-items:flex-start}
      .form-grid{grid-template-columns:1fr}
      .split-images{grid-template-columns:1fr}
    }