:root{
      --bg:#f7f8fc;
      --surface:#ffffff;
      --surface2:#f3f6ff;
      --card:#ffffff;
      --line:#e5eaf5;
      --text:#122033;
      --muted:#5d6b82;
      --primary:#2f6bff;
      --primary2:#00c2ff;
      --accent:#ff7a45;
      --shadow:0 14px 40px rgba(31,61,120,.12);
      --radius:20px;
      --container:1200px;
    }
    *{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 12% 10%, rgba(47,107,255,.11), transparent 26%),
        radial-gradient(circle at 88% 18%, rgba(0,194,255,.10), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, #f7f9ff 28%, #f4f7fd 100%);
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.78);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,234,245,.9)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand-text{display:flex;flex-direction:column;line-height:1.1}
    .brand-text strong{font-size:16px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:9px 10px;border-radius:999px}
    .nav-links a:hover{background:#eef4ff;color:var(--primary)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 18px;font-weight:700;transition:.25s ease;cursor:pointer;border:1px solid transparent}
    .btn{background:linear-gradient(135deg,var(--primary),#5d8cff 55%,var(--primary2));color:#fff;box-shadow:0 10px 24px rgba(47,107,255,.22)}
    .btn:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(47,107,255,.28)}
    .btn-outline{background:#fff;border-color:#d7def0;color:var(--text)}
    .btn-outline:hover{border-color:var(--primary);color:var(--primary)}
    .menu-btn{display:none;background:#fff;border:1px solid #d9e0f0;border-radius:12px;padding:10px 12px;color:var(--text)}
    main{display:block}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-panel,.hero-side,.card,.section-box,.table-wrap,.faq-item,.form-box,.quote,.timeline li{background:rgba(255,255,255,.92);border:1px solid rgba(229,234,245,.95);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-panel{padding:34px;position:relative;overflow:hidden}
    .hero-panel:before,.hero-panel:after{content:"";position:absolute;border-radius:999px;background:linear-gradient(135deg, rgba(47,107,255,.14), rgba(0,194,255,.16));filter:blur(2px)}
    .hero-panel:before{width:220px;height:220px;right:-80px;top:-70px}
    .hero-panel:after{width:160px;height:160px;left:-50px;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#1947aa;background:#eef4ff;border:1px solid #dce7ff;padding:8px 12px;border-radius:999px}
    h1{margin:18px 0 14px;font-size:clamp(32px,4.4vw,56px);line-height:1.06;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.85;color:var(--muted);max-width:44rem}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .point{padding:14px 14px 13px;border-radius:16px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .point strong{display:block;font-size:18px;margin-bottom:4px}
    .point span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
    .badge{font-size:12px;padding:7px 10px;border-radius:999px;background:#eff7ff;color:#1451c7}
    .stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:24px;color:var(--primary);margin-bottom:4px}
    .stat span{font-size:13px;color:var(--muted)}
    .side-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .side-list li{padding:12px 12px 12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:14px}
    .section{padding:20px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:56rem;line-height:1.7}
    .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:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li,.section-box p,.section-box li{color:var(--muted);line-height:1.8}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#edf4ff,#e7fbff);color:var(--primary);font-weight:800;margin-bottom:14px}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #dfe6f4;color:#29415e;font-size:13px}
    .section-box{padding:22px}
    .workflow{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:attr(data-no);position:absolute;right:14px;top:14px;font-size:12px;color:#8ca0bf;background:#f4f7fd;border-radius:999px;padding:5px 8px}
    .step h3{margin:0 0 8px;font-size:17px}
    .table-wrap{padding:12px;overflow-x:auto}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left;font-size:14px}
    th{background:#f5f8ff;color:#203553}
    .highlight{color:#0f5ed8;font-weight:700}
    .rating{display:flex;align-items:center;gap:8px;font-weight:700;color:#c46a00}
    .stars{color:#f6a800;letter-spacing:2px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
    summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:700;display:flex;justify-content:space-between;align-items:center;gap:12px}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 18px;color:var(--muted);line-height:1.8}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .reviews,.articles,.cases,.network{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{padding:20px}
    .quote .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .quote strong{font-size:16px}
    .quote span{color:var(--muted);font-size:13px}
    .article-list{display:grid;gap:12px}
    .article-item{padding:16px 18px;border:1px solid var(--line);border-radius:16px;background:#fff;display:flex;justify-content:space-between;gap:16px;align-items:center}
    .article-item em{font-style:normal;color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-box{padding:22px}
    input,select,textarea{width:100%;border:1px solid #d7def0;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);outline:none}
    textarea{min-height:130px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .full{grid-column:1/-1}
    .footer{margin-top:22px;padding:30px 0 22px;background:#0f1727;color:#d7e2ff}
    .footer a{color:#9cc2ff}
    .footer .container{display:grid;gap:18px}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer small{color:#9fb0d4;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08)}
    .float-box{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .float-box a,.float-box button{border:none;border-radius:999px;padding:12px 15px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(47,107,255,.26);font-weight:700;cursor:pointer}
    .back-top{background:#fff;color:var(--primary);border:1px solid #d7def0}
    .mobile-only{display:none}
    .help-grid{display:grid;grid-template-columns:1fr .9fr;gap:16px}
    .timeline{display:grid;gap:12px}
    .timeline li{list-style:none;padding:16px 18px}
    .timeline strong{display:block;margin-bottom:6px}
    .cover-images{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .cover-images img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);width:100%;height:auto}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.workflow,.reviews,.articles,.cases,.network,.footer-top,.help-grid,.faq-grid,.form-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav-actions .btn-outline{display:none}
      .mobile-only{display:inline-flex}
    }
    .mobile-panel{display:none;padding:14px 0 18px;border-top:1px solid #edf1fb}
    .mobile-panel.open{display:block}
    .mobile-panel .nav-links{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-start}
    .mobile-panel .nav-links a{background:#f6f8ff}