:root{
      --bg:#f6f8ff;
      --bg2:#fff7ef;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#5d6678;
      --line:#dbe3f1;
      --primary:#1d5cff;
      --primary2:#ff5b7a;
      --accent:#13b8a6;
      --gold:#ffb422;
      --shadow:0 18px 50px rgba(30,60,120,.12);
      --radius:20px;
      --container: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;color:var(--text);background:
      radial-gradient(circle at top left, rgba(29,92,255,.12), transparent 24%),
      radial-gradient(circle at top right, rgba(255,91,122,.10), transparent 22%),
      linear-gradient(180deg,var(--bg) 0%, #fbfcff 42%, #fff 100%);}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(246,248,255,.84);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,227,241,.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:40px;height:40px;object-fit:contain;border-radius:10px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(29,92,255,.12)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand small{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .nav-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:rgba(29,92,255,.08);color:var(--primary)}
    .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:.22s ease;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary),#5a7dff);color:#fff;box-shadow:0 14px 26px rgba(29,92,255,.24)}
    .btn-secondary{background:#fff;color:var(--primary);border:1px solid rgba(29,92,255,.18)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(25,60,120,.12)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:14px}
    .menu-toggle span,.menu-toggle span:before,.menu-toggle span:after{display:block;content:"";width:18px;height:2px;background:#273044;border-radius:2px;position:relative;margin:0 auto}
    .menu-toggle span:before{position:absolute;top:-6px}
    .menu-toggle span:after{position:absolute;top:6px}
    main{padding:30px 0 10px}
    section{padding:22px 0}
    .hero{padding-top:8px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.faq-item,.form-card,.review-card,.case-card,.info-card,.price-card{background:rgba(255,255,255,.9);border:1px solid rgba(219,227,241,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(29,92,255,.08);color:var(--primary);padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,4.5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:17px;line-height:1.8;max-width:62ch}
    .hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
    .point{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line)}
    .point strong{display:block;font-size:18px;margin-bottom:6px;color:#152033}
    .point span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-panel{padding:18px;display:grid;gap:12px}
    .panel-top{padding:18px;border-radius:18px;background:linear-gradient(135deg,rgba(29,92,255,.10),rgba(255,91,122,.10));border:1px solid rgba(29,92,255,.12)}
    .panel-top h3{margin:0 0 6px;font-size:20px}
    .panel-top p{margin:0;color:var(--muted);line-height:1.7}
    .mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .mini{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .mini strong{display:block;font-size:22px;color:#152033}
    .mini span{color:var(--muted);font-size:13px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:66ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .card{padding:20px}
    .card h3{margin:12px 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(29,92,255,.12),rgba(255,91,122,.12));color:var(--primary);font-weight:900}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#334155;font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);position:relative}
    .step:before{content:"";position:absolute;left:18px;top:18px;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2))}
    .step h3{margin:18px 0 8px;padding-left:0;font-size:18px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #edf2f7;vertical-align:top}
    th{background:#f8fbff;font-size:14px}
    td{color:#374151;font-size:14px;line-height:1.65}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
    .badge-ok{background:rgba(19,184,166,.12);color:#0f766e}
    .badge-hot{background:rgba(255,180,34,.14);color:#9a6700}
    .badge-pri{background:rgba(29,92,255,.12);color:var(--primary)}
    .split{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}
    .list{margin:0;padding:0;list-style:none;display:grid;gap:12px}
    .list li{padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
    .list li:before{content:"•";color:var(--primary);font-size:20px;line-height:1}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
    details+details{margin-top:12px}
    summary{cursor:pointer;list-style:none;padding:18px 18px;font-weight:700;display:flex;justify-content:space-between;gap:16px}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 18px;color:var(--muted);line-height:1.75}
    .reviews,.cases,.articles,.prices,.network{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .review-card,.case-card,.info-card,.price-card{padding:20px}
    .review-card .name{font-weight:800;margin-top:14px}
    .review-card .role{color:var(--muted);font-size:13px}
    .stars{color:#ff9f1c;font-size:15px;letter-spacing:2px}
    .articles a{display:block}
    .articles h3,.case-card h3,.price-card h3{margin:12px 0 8px;font-size:18px}
    .articles p,.case-card p,.price-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .form-card{padding:22px}
    form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:13px;font-weight:700;margin-bottom:8px;color:#334155}
    input,select,textarea{width:100%;border:1px solid #ccd7ea;background:#fff;border-radius:14px;padding:14px 14px;font:inherit;color:var(--text);outline:none;transition:.2s}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(29,92,255,.55);box-shadow:0 0 0 4px rgba(29,92,255,.08)}
    .footer{padding:26px 0 30px;border-top:1px solid rgba(219,227,241,.9);margin-top:18px;background:linear-gradient(180deg, rgba(246,248,255,.65), rgba(255,255,255,.95))}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .footer p,.footer a,.footer li{color:#495264}
    .footer .small{font-size:13px;line-height:1.8;color:#667085}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#5a7dff);color:#fff;box-shadow:0 16px 30px rgba(29,92,255,.28);border:none;cursor:pointer}
    .customer{position:fixed;left:16px;bottom:16px;z-index:60;background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px;box-shadow:var(--shadow);width:184px}
    .customer img{border-radius:14px;width:100%;height:auto}
    .customer span{display:block;margin-top:8px;font-size:13px;color:#475569;text-align:center}
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    .ai-page-image{border-radius:18px}
    @media (max-width: 980px){
      .hero-grid,.split,.footer-grid,.grid-4,.timeline,.reviews,.cases,.articles,.prices,.network{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .nav-links,.nav-actions .btn-secondary{display:none}
      .menu-toggle{display:inline-grid;place-items:center}
      .mobile-menu{display:none;flex-direction:column;gap:8px;padding:0 0 14px}
      .mobile-menu.open{display:flex}
      .hero-grid,.split,.footer-grid,.grid-4,.timeline,.reviews,.cases,.articles,.prices,.network,form{grid-template-columns:1fr}
      .hero-copy{padding:24px}
      .customer{display:none}
      .section-head{flex-direction:column;align-items:flex-start}
    }