:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f3f7ff;
      --text:#1f2a37;
      --muted:#5b6472;
      --brand:#2f6bff;
      --brand-2:#7a5cff;
      --accent:#ff8a3d;
      --line:#d9e3f2;
      --shadow:0 18px 42px rgba(47,107,255,.12);
      --radius:20px;
      --radius-sm:14px;
      --max: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;background:
      radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 28%),
      radial-gradient(circle at top right, rgba(255,138,61,.10), transparent 24%),
      linear-gradient(180deg, #fbfcff 0%, #f6f8fc 100%);
      color:var(--text);line-height:1.6}
    a{color:var(--brand);text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(251,252,255,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(217,227,242,.7)}
    .nav-wrap{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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:6px}
    .brand-title{font-weight:800;font-size:18px;letter-spacing:.5px}
    .brand-sub{font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav-menu a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-menu a:hover,.nav-menu a.active{background:rgba(47,107,255,.08);color:var(--brand)}
    .home-link{padding:10px 14px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff !important;font-weight:700;box-shadow:0 10px 22px rgba(47,107,255,.2)}
    .hero{position:relative;overflow:hidden;padding:40px 0 24px}
    .hero::before,.hero::after{content:"";position:absolute;inset:auto;border-radius:999px;filter:blur(2px);pointer-events:none}
    .hero::before{width:280px;height:280px;background:rgba(47,107,255,.12);top:-80px;right:-120px}
    .hero::after{width:220px;height:220px;background:rgba(255,138,61,.12);bottom:-80px;left:-80px}
    .hero-grid{display:grid;grid-template-columns:1.3fr .9fr;gap:22px;align-items:stretch}
    .hero-card,.glass-card,.section-card,.contact-card{background:rgba(255,255,255,.82);border:1px solid rgba(217,227,242,.9);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-card{padding:30px}
    .badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(47,107,255,.08);color:var(--brand);font-weight:700;font-size:13px}
    h1{margin:14px 0 12px;font-size:clamp(30px,4vw,50px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:13px 18px;font-weight:700;cursor:pointer;transition:.2s ease;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 24px rgba(47,107,255,.22)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{display:grid;gap:16px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #f6f9ff);border:1px solid var(--line)}
    .metric strong{display:block;font-size:28px;line-height:1;color:var(--text)}
    .metric span{display:block;color:var(--muted);font-size:13px;margin-top:8px}
    .hero-mini{padding:18px}
    .hero-mini h2,.section-head h2{margin:0 0 8px;font-size:24px}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .section-head p{margin:0;color:var(--muted)}
    .section-card{padding:22px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .feature-card{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);transition:.2s ease;min-height:100%}
    .feature-card:hover,.review-card:hover,.case-card:hover,.article-card:hover,.glass-card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(47,107,255,.12)}
    .feature-card h3,.review-card h3,.case-card h3,.article-card h3{margin:10px 0 8px;font-size:18px}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(47,107,255,.12),rgba(122,92,255,.12));color:var(--brand);font-weight:900}
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);position:relative}
    .step .num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800;margin-bottom:10px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #e8eef7;text-align:left;font-size:14px}
    th{background:#f6f9ff;color:var(--text)}
    .positive{color:#167a3b;font-weight:700}
    .high{font-weight:800;color:#d95b00}
    .reviews,.cases,.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card,.case-card,.article-card{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);transition:.2s ease}
    .review-top{display:flex;justify-content:space-between;gap:12px;align-items:center}
    .stars{color:#ffb400;letter-spacing:2px;font-size:14px}
    .rating-box{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .rating-card{padding:20px;border-radius:18px;background:linear-gradient(135deg,rgba(47,107,255,.10),rgba(255,138,61,.08));border:1px solid rgba(47,107,255,.14)}
    .rating-card strong{display:block;font-size:32px}
    .accordion{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
    summary{list-style:none;padding:16px 18px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 16px;color:var(--muted)}
    .contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--text);font:inherit;outline:none}
    input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.55);box-shadow:0 0 0 4px rgba(47,107,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .footer{margin-top:18px;padding:28px 0 30px;background:#eff4fb;border-top:1px solid var(--line);color:var(--text)}
    .footer a{color:var(--brand)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px;align-items:start}
    .small{color:var(--muted);font-size:13px}
    .qr{display:flex;align-items:flex-start;gap:14px}
    .qr img{width:102px;height:102px;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#fff}
    .float-tools{position:fixed;right:18px;bottom:18px;display:grid;gap:10px;z-index:60}
    .tool{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 24px rgba(47,107,255,.24);border:0;cursor:pointer}
    .back-top{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}
    .back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .modal{position:fixed;inset:0;background:rgba(17,24,39,.52);display:none;align-items:center;justify-content:center;padding:18px;z-index:80}
    .modal.show{display:flex}
    .modal-card{width:min(420px,100%);background:#fff;border-radius:22px;padding:18px;border:1px solid var(--line);box-shadow:0 30px 70px rgba(0,0,0,.18)}
    .modal-card img{width:100%;border-radius:16px}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .section-note{padding:14px 16px;border-radius:16px;background:rgba(47,107,255,.06);border:1px dashed rgba(47,107,255,.2);color:var(--muted)}
    .articles ul{padding-left:18px;margin:10px 0 0;color:var(--muted)}
    .service-network{display:flex;flex-wrap:wrap;gap:10px}
    .service-network span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .marquee{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    @media (max-width: 980px){
      .hero-grid,.contact-grid,.footer-grid,.grid-3,.grid-4,.reviews,.cases,.articles,.timeline,.rating-box,.two-col{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-menu{display:none;width:100%;padding:10px 0 4px}
      .nav-menu.open{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
      .nav-wrap{flex-wrap:wrap}
      .hero{padding-top:22px}
      .hero-card{padding:22px}
    }
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .scroll-reveal.visible{opacity:1;transform:none}