:root{
      --bg:#f5f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5d6b85;
      --line:#dbe3f0;
      --primary:#1d4ed8;
      --primary2:#0ea5e9;
      --accent:#ff8a00;
      --accent2:#14b8a6;
      --shadow:0 18px 50px rgba(18, 38, 76, .08);
      --shadow2:0 10px 24px rgba(37, 99, 235, .12);
      --radius:20px;
      --radius2:14px;
      --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(14,165,233,.12), transparent 26%),
      radial-gradient(circle at top right, rgba(29,78,216,.10), transparent 22%),
      linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(245,247,251,.84);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,227,240,.75)}
    .header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:76px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:0 8px 20px rgba(17,24,39,.08)}
    .brand-name{font-weight:800;letter-spacing:.5px}
    .brand-sub{font-size:12px;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px;font-weight:700}
    .nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:10px;transition:.25s}
    .nav a:hover,.nav a.active{color:var(--primary);background:rgba(29,78,216,.08)}
    .top-cta{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:12px 16px;font-weight:700;cursor:pointer;transition:.25s;white-space:nowrap}
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),#2563eb);box-shadow:var(--shadow2)}
    .btn-secondary{color:var(--primary);background:#fff;border:1px solid rgba(29,78,216,.18)}
    .btn:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(29,78,216,.15)}
    .hero{padding:42px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-panel,.info-panel,.section-card,.faq-item,.review-card,.article-card,.feature-card,.case-card,.timeline-card,.price-card,.contact-card{background:var(--card);border:1px solid rgba(219,227,240,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-panel{padding:34px;position:relative;overflow:hidden}
    .hero-panel:before,.hero-panel:after{content:"";position:absolute;border-radius:999px;pointer-events:none}
    .hero-panel:before{width:240px;height:240px;right:-90px;top:-80px;background:radial-gradient(circle, rgba(14,165,233,.16), transparent 68%)}
    .hero-panel:after{width:180px;height:180px;left:-60px;bottom:-70px;background:radial-gradient(circle, rgba(255,138,0,.12), transparent 68%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(14,165,233,.10);color:#0f4fa8;font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.82;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 20px}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px}
    .trust-tag{padding:9px 12px;border-radius:999px;background:linear-gradient(135deg,#fff, #f3f7ff);border:1px solid rgba(29,78,216,.12);color:#254063;font-size:13px;font-weight:600}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid rgba(219,227,240,.9)}
    .stat strong{display:block;font-size:24px;color:#0f2d60}
    .stat span{display:block;margin-top:5px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{display:grid;gap:16px}
    .mini-card{padding:22px}
    .mini-card h3{margin:0 0 10px;font-size:18px}
    .mini-card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .small-list{display:grid;gap:10px;margin-top:14px}
    .small-list div{display:flex;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:12px;background:#f8fbff;border:1px solid rgba(219,227,240,.8);font-size:13px;color:#31415f}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.75}
    .section-card{padding:22px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature-card,.case-card,.review-card,.article-card,.price-card,.timeline-card{padding:20px}
    .feature-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.timeline-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.case-card p,.review-card p,.article-card p,.price-card p,.timeline-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon-badge{width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(29,78,216,.12),rgba(14,165,233,.14));color:var(--primary);font-weight:800;margin-bottom:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:10px 12px;border-radius:999px;background:#f8fbff;border:1px solid rgba(219,227,240,.9);font-size:13px;color:#33415f}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid rgba(219,227,240,.92)}
    .step strong{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;border-radius:10px;background:rgba(29,78,216,.10);color:var(--primary);margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid rgba(219,227,240,.9);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:780px}
    th,td{padding:15px 14px;border-bottom:1px solid rgba(219,227,240,.85);vertical-align:top;text-align:left}
    th{background:#f6f9ff;color:#1f345d;font-size:14px}
    td{color:#33415f;line-height:1.7}
    .score-card{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff;border-radius:20px;padding:22px;box-shadow:0 20px 50px rgba(29,78,216,.18)}
    .score-card .score{font-size:42px;font-weight:900;line-height:1}
    .score-card p{color:rgba(255,255,255,.88)}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:0;padding:18px 18px;font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 18px}
    .faq-a p{margin:0 0 16px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:220px}
    .review-meta{display:flex;align-items:center;gap:10px;margin-bottom:12px}
    .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,rgba(29,78,216,.15),rgba(255,138,0,.16));display:flex;align-items:center;justify-content:center;font-weight:800;color:#21406d}
    .stars{color:#f59e0b;font-size:14px;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .article-card .meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;color:#6b7891;font-size:13px}
    .article-card .meta span{padding:6px 10px;background:#f5f8ff;border-radius:999px;border:1px solid rgba(219,227,240,.9)}
    .contact-layout{display:grid;grid-template-columns:1fr .9fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    label{font-size:13px;font-weight:700;color:#32415f}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none;transition:.2s}
    textarea{min-height:118px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(29,78,216,.45);box-shadow:0 0 0 4px rgba(29,78,216,.08)}
    .support-box{display:grid;gap:14px}
    .qrcode{width:160px;aspect-ratio:1/1;object-fit:cover;border-radius:18px;border:1px solid rgba(219,227,240,.9);background:#fff}
    .footer{margin-top:22px;padding:26px 0 28px;border-top:1px solid rgba(219,227,240,.85);background:linear-gradient(180deg,rgba(255,255,255,.6),rgba(243,247,252,.92))}
    .footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:18px;align-items:start}
    .footer h3{margin:0 0 12px;font-size:18px}
    .footer p,.footer a,.footer li{color:var(--muted);line-height:1.8;font-size:14px}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid rgba(219,227,240,.9)}
    .footer-bottom{margin-top:18px;padding-top:16px;border-top:1px solid rgba(219,227,240,.85);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;color:#60708a}
    .floating-tools{position:fixed;right:16px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid rgba(219,227,240,.95);box-shadow:var(--shadow);color:var(--primary);font-weight:800}
    .mobile-only{display:none}
    .fade-in{opacity:0;transform:translateY(16px);transition:.6s ease}
    .fade-in.visible{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.contact-layout,.footer-grid,.grid-3,.grid-2,.articles,.workflow{grid-template-columns:1fr}
      .hero-stats{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav{position:absolute;left:20px;right:20px;top:76px;display:none;flex-direction:column;align-items:stretch;padding:12px;background:#fff;border:1px solid rgba(219,227,240,.9);border-radius:18px;box-shadow:var(--shadow)}
      .nav.open{display:flex}
      .top-cta{display:none}
      .mobile-only{display:flex}
      .form-grid{grid-template-columns:1fr}
      .hero-panel{padding:26px}
      .header-inner{position:relative}
    }
    @media (max-width: 640px){
      .container{padding:0 16px}
      .hero{padding-top:18px}
      .hero-panel,.section-card{padding:18px}
      h1{font-size:clamp(28px,9vw,38px)}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav a{padding:11px 12px}
    }