:root{
      --bg:#f6f7fb;
      --surface:#ffffff;
      --surface-2:#f1f4ff;
      --text:#132033;
      --muted:#5c6b80;
      --line:#d9e0ee;
      --primary:#4b6bff;
      --primary-2:#7b5cff;
      --accent:#19b4c6;
      --warm:#ffb35c;
      --shadow:0 18px 45px rgba(35,55,100,.10);
      --radius:20px;
      --radius-sm:14px;
      --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;color:var(--text);background:
      radial-gradient(circle at 10% 10%, rgba(75,107,255,.12), transparent 28%),
      radial-gradient(circle at 90% 0%, rgba(25,180,198,.10), transparent 26%),
      linear-gradient(180deg,#fbfcff 0%, #f5f7fc 44%, #f7f8fc 100%);}
    a{color:inherit;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:30;background:rgba(247,249,255,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(217,224,238,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;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:6px;box-shadow:0 8px 24px rgba(0,0,0,.06)}
    .brand strong{display:block;font-size:18px;line-height:1.15}
    .brand span{display:block;color:var(--muted);font-size:12px}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px;transition:.22s ease}
    .nav-links a:hover,.nav-links a:focus{background:#eef3ff;color:#2340c7}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;border-radius:999px;font-weight:700;border:1px solid transparent;transition:.22s ease;cursor:pointer;white-space:nowrap}
    .btn{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 12px 30px rgba(75,107,255,.22)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 35px rgba(75,107,255,.28)}
    .btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-outline:hover{border-color:#b9c7ff;color:#2741c8;transform:translateY(-1px)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;width:44px;height:44px;align-items:center;justify-content:center}
    .menu-btn span,.menu-btn span:before,.menu-btn span:after{display:block;width:18px;height:2px;background:#24324a;border-radius:2px;position:relative}
    .menu-btn span:before,.menu-btn span:after{content:"";position:absolute;left:0}
    .menu-btn span:before{top:-6px}.menu-btn span:after{top:6px}
    main{overflow:hidden}
    section{padding:70px 0}
    .hero{padding:34px 0 56px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.faq-item,.review,.timeline li,.stat,.price-box,.case,.form-wrap,.compare,.info-card{background:rgba(255,255,255,.92);border:1px solid rgba(217,224,238,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#edf2ff;color:#2948d6;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(32px,4.5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .stat{padding:16px}
    .stat strong{display:block;font-size:22px}
    .stat span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.5}
    .hero-panel{padding:24px;background:
      linear-gradient(180deg, rgba(240,244,255,.95), rgba(255,255,255,.92)),
      radial-gradient(circle at 20% 10%, rgba(123,92,255,.12), transparent 32%),
      radial-gradient(circle at 85% 18%, rgba(25,180,198,.14), transparent 30%);}
    .panel-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}
    .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 20px}
    .chip{padding:8px 10px;border-radius:999px;background:#fff;color:#2d3c58;border:1px solid #dde5f5;font-size:13px}
    .panel-box{padding:18px;border-radius:18px;background:#fff;border:1px solid #dfe7f7}
    .panel-list{margin:0;padding-left:18px;color:var(--text);line-height:1.75}
    .panel-list li{margin:6px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:24px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .card{padding:22px}
    .card h3,.card h4,.case h3,.review h3{margin:0 0 10px;font-size:18px}
    .card p,.case p,.review p,.info-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#eef3ff,#effffb);color:#2845d8;font-weight:900;margin-bottom:14px}
    .highlight{background:linear-gradient(135deg,#f7f8ff, #eef7ff);border:1px solid #dce7ff}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid #dfe6f4;position:relative}
    .step .num{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;margin-bottom:10px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid #d9e0ee;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:15px 16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f3f6ff;color:#1f2f49;font-size:14px}
    td{color:#304056;font-size:14px;line-height:1.7}
    .score{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
    .score strong{font-size:42px;line-height:1;color:#21314e}
    .stars{color:#f3b400;font-size:20px;letter-spacing:2px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;border:1px solid #dbe4f5;background:#fff;border-radius:999px;color:#304056;font-size:13px}
    .timeline{list-style:none;margin:0;padding:0;display:grid;gap:14px}
    .timeline li{padding:18px 18px 18px 20px;border-left:4px solid #5a76ff}
    .timeline strong{display:block;margin-bottom:6px}
    .reviews .review{padding:20px;display:grid;gap:10px}
    .review .meta{display:flex;justify-content:space-between;gap:12px;color:#6b7a90;font-size:13px}
    .mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article-list{display:grid;gap:14px}
    .article-item{display:flex;justify-content:space-between;gap:12px;padding:16px 18px;background:#fff;border:1px solid #dfe6f4;border-radius:16px}
    .article-item span{color:var(--muted);font-size:13px}
    .forms{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}
    form{display:grid;gap:14px}
    label{font-size:14px;font-weight:700;color:#24324a}
    input,select,textarea{width:100%;margin-top:8px;padding:13px 14px;border-radius:14px;border:1px solid #d6deee;background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s ease}
    input:focus,select:focus,textarea:focus{border-color:#7e95ff;box-shadow:0 0 0 4px rgba(75,107,255,.10)}
    textarea{min-height:124px;resize:vertical}
    .contact-box{padding:22px;display:grid;gap:14px}
    .contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .contact-item{padding:16px;border-radius:16px;background:#f8faff;border:1px solid #e4ebf8}
    .contact-item strong{display:block;margin-bottom:6px}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;background:none;border:0;padding:18px 20px;font:inherit;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;text-align:left}
    .faq-q span{font-weight:700}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}
    .faq-item.active .faq-a{max-height:220px;padding-bottom:18px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.75}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    footer{padding:34px 0 22px;background:#0f1728;color:#e6eefc;margin-top:6px}
    footer .container{display:grid;gap:18px}
    footer a{color:#cfe0ff}
    .foot-card{padding:22px;border-radius:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
    .foot-links{display:flex;flex-wrap:wrap;gap:12px}
    .foot-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.06)}
    .copyright{color:#a9b8d2;font-size:13px;line-height:1.7}
    .floating{position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 14px 30px rgba(16,48,120,.25);border:0;cursor:pointer}
    .side-contact{position:fixed;left:16px;bottom:16px;z-index:35;background:#fff;border:1px solid #dce5f2;border-radius:18px;box-shadow:var(--shadow);width:160px;overflow:hidden}
    .side-contact .head{padding:10px 12px;background:linear-gradient(135deg,#eef2ff,#f2fbff);font-weight:800;color:#20304f}
    .side-contact .body{padding:12px;display:grid;gap:10px}
    .side-contact img{width:100%;border-radius:12px}
    .side-contact small{color:var(--muted);line-height:1.5;display:block}
    .fade-up{opacity:0;transform:translateY(18px);transition:.6s ease}
    .fade-up.in{opacity:1;transform:none}
    .mobile-menu{display:none}
    @media (max-width: 1040px){
      .hero-grid,.grid-3,.grid-2,.workflow,.forms,.footer-top,.mini-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-menu.active{display:grid;gap:8px;padding:0 0 16px}
      .mobile-menu a{padding:12px 14px;border-radius:12px;background:#fff;border:1px solid #dce5f2}
      .hero-metrics{grid-template-columns:1fr}
      .contact-grid{grid-template-columns:1fr}
      .side-contact{display:none}
    }