:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#182233;
      --muted:#5e6b82;
      --line:#dbe3f2;
      --primary:#5a67ff;
      --primary2:#21c7a8;
      --accent:#ff7bb8;
      --shadow:0 18px 50px rgba(49,68,126,.12);
      --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",sans-serif;background:
      radial-gradient(circle at top left, rgba(90,103,255,.10), transparent 28%),
      radial-gradient(circle at top right, rgba(33,199,168,.12), transparent 24%),
      linear-gradient(180deg,#fbfcff 0%,#f3f7ff 100%);
      color:var(--text);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}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,227,242,.75)}
    .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;border-radius:12px;background:#fff;padding:4px;box-shadow:0 10px 24px rgba(65,84,156,.10)}
    .brand-name{font-size:18px;font-weight:800;letter-spacing:.4px}
    .brand-sub{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#33415c;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:#eef2ff;color:var(--primary)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{position:relative;padding:54px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card{background:rgba(255,255,255,.78);border:1px solid rgba(219,227,242,.9);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{content:"";position:absolute;border-radius:999px;filter:blur(3px);pointer-events:none}
    .hero-main::before{width:240px;height:240px;background:radial-gradient(circle, rgba(90,103,255,.18), transparent 68%);right:-70px;top:-60px}
    .hero-main::after{width:180px;height:180px;background:radial-gradient(circle, rgba(255,123,184,.14), transparent 70%);left:-40px;bottom:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,rgba(90,103,255,.12),rgba(33,199,168,.12));color:#30407a;border:1px solid rgba(90,103,255,.16);padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.8px}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:60ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:14px;padding:13px 18px;font-weight:700;cursor:pointer;transition:.22s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary),#7c4dff);color:#fff}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(90,103,255,.28)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#c8d3ee;box-shadow:0 12px 24px rgba(30,48,94,.08)}
    .hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:26px}
    .stat{background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line);border-radius:18px;padding:16px}
    .stat strong{display:block;font-size:24px;line-height:1.1}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .hero-side{padding:22px}
    .side-title{font-size:18px;font-weight:800;margin:0 0 12px}
    .feature-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .feature-list li{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:14px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);color:#30405d}
    .dot{width:10px;height:10px;margin-top:6px;border-radius:50%;background:linear-gradient(135deg,var(--primary2),var(--accent))}
    .section{padding:16px 0}
    .section-card{padding:26px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted);max-width:70ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;transition:.22s;box-shadow:0 10px 28px rgba(47,64,120,.06)}
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(47,64,120,.12)}
    .card h3,.card h4{margin:0 0 8px}
    .card p{margin:0;color:var(--muted)}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px}
    .pill{display:inline-flex;align-items:center;padding:9px 12px;border-radius:999px;background:linear-gradient(135deg,rgba(90,103,255,.08),rgba(33,199,168,.08));border:1px solid rgba(90,103,255,.12);color:#31436d;font-size:13px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:start;padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .timeline-item b{color:var(--primary)}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 14px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top;font-size:14px}
    th{background:#f6f8ff;color:#24314a;font-weight:800}
    tr:hover td{background:#fcfdff}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 16px;box-shadow:0 10px 22px rgba(41,56,96,.05)}
    summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:#22304a}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px;color:var(--muted)}
    .reviews{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .review{position:relative}
    .quote{font-size:42px;line-height:1;color:rgba(90,103,255,.18);position:absolute;top:12px;right:16px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;margin-top:12px;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}
    .field label{font-size:14px;font-weight:700;color:#31415b}
    .field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#9aa8ff;box-shadow:0 0 0 4px rgba(90,103,255,.10)}
    .field textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article-card{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .article-card .tag{display:inline-block;font-size:12px;color:var(--primary);background:rgba(90,103,255,.08);padding:6px 10px;border-radius:999px;margin-bottom:10px}
    footer{margin-top:18px;padding:28px 0 34px;background:#f6f8ff;border-top:1px solid var(--line);color:#24314a}
    footer a{color:#24314a}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}
    .small{font-size:13px;color:var(--muted)}
    .support-grid{display:grid;grid-template-columns:1fr 260px;gap:16px;align-items:start}
    .qr{border:1px solid var(--line);border-radius:18px;padding:14px;background:#fff;text-align:center}
    .qr img{width:220px;margin:0 auto;border-radius:14px}
    .float-bar{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .float-bar a,.float-bar button{width:48px;height:48px;border-radius:14px;border:1px solid rgba(219,227,242,.95);background:#fff;box-shadow:0 10px 22px rgba(39,57,100,.12);display:grid;place-items:center;color:var(--text);cursor:pointer;transition:.2s}
    .float-bar a:hover,.float-bar button:hover{transform:translateY(-2px)}
    .mobile-only{display:none}
    .banner-img{border-radius:18px;border:1px solid var(--line);overflow:hidden}
    .banner-img img{width:100%;height:auto}
    .scroll-x{overflow-x:auto}
    .service-tags{display:flex;flex-wrap:wrap;gap:10px}
    .service-tags span{padding:8px 11px;border-radius:12px;background:#fff;border:1px solid var(--line);font-size:13px;color:#32415b}
    .compare-badges{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:14px}
    .badge-box{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .badge-box strong{display:block;font-size:18px}
    .fade-in{opacity:0;transform:translateY(14px);transition:all .7s ease}
    .fade-in.in{opacity:1;transform:translateY(0)}
    @media (max-width: 980px){
      .hero-grid,.split,.support-grid,.footer-grid,.grid-3,.grid-4,.reviews,.articles,.form-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .hero{padding-top:26px}
      .hero-main{padding:26px}
      .section-card{padding:20px}
      .compare-badges{grid-template-columns:1fr}
    }
    .nav-panel{display:none;padding:0 0 14px}
    .nav-panel.open{display:block}
    .nav-panel .nav-links{display:flex;flex-direction:column;align-items:flex-start;gap:6px;background:#fff;border:1px solid var(--line);padding:12px;border-radius:16px}