:root{
      --bg:#f7f9fc;
      --bg2:#eef5ff;
      --card:#ffffff;
      --text:#1f2a37;
      --muted:#5b6675;
      --line:#dbe5f3;
      --primary:#2f6bff;
      --primary2:#00b7c6;
      --accent:#ff8a3d;
      --shadow:0 14px 40px rgba(28,54,110,.10);
      --radius:18px;
      --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;
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(0,183,198,.10), transparent 24%),
        linear-gradient(180deg, #fefeff 0%, var(--bg) 30%, #f6f9ff 100%);
      color:var(--text);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(219,229,243,.75);
    }
    .nav-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 20px rgba(31,42,55,.06)}
    .brand strong{display:block;font-size:1rem;line-height:1.2}
    .brand span{display:block;color:var(--muted);font-size:.85rem}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.95rem;color:#324255;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:#edf4ff;color:var(--primary)}
    .cta-btn,.ghost-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;font-weight:700;transition:.2s;border:1px solid transparent
    }
    .cta-btn{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 24px rgba(47,107,255,.18)}
    .ghost-btn{background:#fff;border-color:var(--line);color:var(--text)}
    .cta-btn:hover,.ghost-btn:hover,.card:hover,.service-card:hover,.review-card:hover,.article-card:hover{transform:translateY(-2px)}
    .hero{padding:44px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-panel,.info-panel,.section-card,.form-panel,.faq-panel,.compare-panel{background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(255,255,255,.88));border:1px solid rgba(219,229,243,.9);border-radius:24px;box-shadow:var(--shadow)}
    .hero-panel{padding:30px;position:relative;overflow:hidden}
    .hero-panel:before,.hero-panel:after{content:"";position:absolute;border-radius:50%;filter:blur(6px);opacity:.55}
    .hero-panel:before{width:180px;height:180px;background:rgba(47,107,255,.10);right:-50px;top:-40px}
    .hero-panel:after{width:140px;height:140px;background:rgba(0,183,198,.12);left:-40px;bottom:-30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#edf4ff;color:#2958d6;font-weight:700;font-size:.86rem}
    h1{margin:16px 0 14px;font-size:clamp(2rem,4vw,3.6rem);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:1.03rem;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#eef5ff);border:1px solid #dce7f6}
    .mini-stat strong{display:block;font-size:1.2rem;margin-bottom:6px}
    .mini-stat span{color:var(--muted);font-size:.92rem}
    .hero-side{display:grid;gap:16px}
    .info-panel{padding:22px}
    .info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .info-item{padding:16px;border-radius:18px;background:#f8fbff;border:1px solid #e1ebf7}
    .info-item strong{display:block;font-size:1.1rem;margin-bottom:6px}
    .info-item span{color:var(--muted);font-size:.92rem;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:clamp(1.4rem,2.4vw,2.1rem)}
    .section-head p{margin:0;color:var(--muted);max-width:60ch;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,.service-card,.review-card,.article-card,.case-card,.step-card,.tag-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 24px rgba(28,54,110,.06);transition:.22s}
    .card{padding:18px}
    .card h3,.service-card h3,.review-card h3,.case-card h3,.step-card h3{margin:0 0 10px;font-size:1.05rem}
    .card p,.service-card p,.review-card p,.case-card p,.step-card p{margin:0;color:var(--muted);line-height:1.72}
    .kpi{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
    .kpi strong{font-size:1.8rem}
    .kpi small{color:var(--muted)}
    .service-card{padding:18px}
    .service-card .chip{display:inline-flex;padding:6px 10px;border-radius:999px;background:#edf4ff;color:#2958d6;font-size:.82rem;font-weight:700;margin-bottom:12px}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .list{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step-card{padding:18px;position:relative}
    .step-card .num{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(47,107,255,.12),rgba(0,183,198,.12));color:#234dcc;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #ecf1f7;text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#243244;font-size:.95rem}
    td{color:#415064}
    .rating-box{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:stretch}
    .score-card{padding:22px;border-radius:24px;background:linear-gradient(135deg,#eff5ff,#f9fcff);border:1px solid #dce7f6}
    .score-card strong{font-size:2.6rem;display:block;color:#1d4ed8;line-height:1}
    .score-card span{color:var(--muted)}
    .faq-item{border-bottom:1px solid #e7edf6}
    .faq-q{width:100%;padding:16px 18px;background:none;border:0;text-align:left;font-size:1rem;font-weight:700;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:12px}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:16px}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s}
    .reviews,.articles,.cases,.tags{display:grid;gap:16px}
    .reviews{grid-template-columns:repeat(3,minmax(0,1fr))}
    .review-card{padding:18px}
    .stars{color:#f59e0b;letter-spacing:2px;margin-bottom:10px}
    .articles{grid-template-columns:repeat(3,minmax(0,1fr))}
    .article-card{padding:18px}
    .article-card .meta{color:#6b7280;font-size:.88rem;margin-top:10px}
    .cases{grid-template-columns:repeat(3,minmax(0,1fr))}
    .case-card{padding:18px}
    .tags{grid-template-columns:repeat(6,minmax(0,1fr))}
    .tag-card{padding:14px 12px;text-align:center;color:#344256;font-weight:600;background:#fff}
    .form-panel{padding:22px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:grid;gap:8px;font-weight:600;color:#2d3748;font-size:.95rem}
    input,select,textarea{
      width:100%;border:1px solid #d9e3f0;border-radius:14px;background:#fff;padding:12px 14px;font:inherit;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7aa1ff;box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .footer{padding:22px 0 30px}
    .footer-box{background:#101828;color:#dbe7ff;border-radius:24px;padding:22px;border:1px solid rgba(255,255,255,.08)}
    .footer-box a{color:#ffffff}
    .footer-top{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.08)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      border:0;border-radius:999px;padding:12px 14px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 24px rgba(47,107,255,.24);font-weight:700
    }
    .floating button{cursor:pointer}
    .mobile-menu{display:none}
    .section-card{padding:22px}
    .article-strip{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .image-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);background:#fff}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.steps,.reviews,.articles,.cases,.rating-box,.two-col,.footer-top,.article-strip,.image-row{grid-template-columns:1fr}
      .tags{grid-template-columns:repeat(3,minmax(0,1fr))}
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;box-shadow:0 12px 28px rgba(0,0,0,.08)}
      .nav-links.show{display:flex;flex-direction:column;align-items:flex-start}
      .nav-bar{position:relative}
      .hero{padding-top:26px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .hero-panel,.info-panel,.section-card,.form-panel,.faq-panel,.compare-panel{border-radius:20px}
      .hero-panel{padding:22px}
      .hero-points,.info-grid,.form-grid,.tags{grid-template-columns:1fr}
      h1{font-size:1.95rem}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:all .55s ease}
    .reveal.in{opacity:1;transform:none}