:root{
      --bg:#f6f8ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#142033;
      --muted:#5f6b84;
      --line:#dbe3f3;
      --primary:#2563eb;
      --primary2:#7c3aed;
      --accent:#00b8d9;
      --warm:#ffb36b;
      --shadow:0 18px 50px rgba(20,32,51,.10);
      --shadow2:0 12px 28px rgba(37,99,235,.12);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:
      radial-gradient(circle at top left,rgba(124,58,237,.10),transparent 28%),
      radial-gradient(circle at top right,rgba(0,184,217,.10),transparent 22%),
      linear-gradient(180deg,#fbfcff 0%,var(--bg) 42%,#f8fbff 100%);}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    header{position:sticky;top:0;z-index:50;background:rgba(251,252,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,227,243,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:76px}
    .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:4px;box-shadow:0 8px 18px rgba(37,99,235,.10)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    nav ul{display:flex;flex-wrap:wrap;gap:10px 16px;list-style:none;margin:0;padding:0;align-items:center;justify-content:flex-end}
    nav a{font-size:14px;color:#2a3854;padding:8px 10px;border-radius:10px;transition:.25s ease}
    nav a:hover,nav a.active{background:rgba(37,99,235,.09);color:var(--primary)}
    .hero{padding:34px 0 12px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.step,.case,.metric,.price-box,.article,.contact-box,.timeline-item{background:var(--card);border:1px solid rgba(219,227,243,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden;background:
      linear-gradient(135deg,rgba(37,99,235,.08),rgba(124,58,237,.08) 56%,rgba(0,184,217,.08));
    }
    .hero-main::before,.hero-main::after{content:"";position:absolute;border-radius:999px;pointer-events:none}
    .hero-main::before{width:260px;height:260px;background:radial-gradient(circle,rgba(37,99,235,.15),transparent 68%);top:-110px;right:-80px}
    .hero-main::after{width:180px;height:180px;background:radial-gradient(circle,rgba(0,184,217,.12),transparent 70%);bottom:-70px;left:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid rgba(219,227,243,.95);color:#345;box-shadow:0 8px 18px rgba(20,32,51,.05);font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.06;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 28px rgba(37,99,235,.22)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .metric{padding:18px 16px;background:rgba(255,255,255,.8)}
    .metric strong{display:block;font-size:24px;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-panel{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .mini-panel h3{margin:0 0 8px;font-size:16px}
    .mini-panel p,.mini-panel li{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .mini-panel ul{margin:0;padding-left:18px}
    .strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .tag{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#355}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:8px 0 16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:66ch;line-height:1.7}
    .section-grid{display:grid;gap:16px}
    .cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
    .cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
    .section-card{padding:22px}
    .section-card h3{margin:0 0 10px;font-size:18px}
    .section-card p,.section-card li{color:var(--muted);line-height:1.75}
    .section-card ul{margin:0;padding-left:18px}
    .service-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .service-item{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);transition:.25s ease}
    .service-item:hover{transform:translateY(-3px);box-shadow:var(--shadow2)}
    .service-item strong{display:block;margin-bottom:8px}
    .service-item span{color:var(--muted);font-size:14px;line-height:1.7}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:16px 18px;border-left:4px solid var(--primary)}
    .timeline-item h3{margin:0 0 6px;font-size:16px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:780px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top}
    th{background:#f6f8ff;font-size:14px}
    td{color:#31415f;font-size:14px;line-height:1.65}
    .rating{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
    .stars{color:#f59e0b;font-size:18px;letter-spacing:2px}
    .compare-grid{display:grid;grid-template-columns:1fr .9fr;gap:16px}
    .score-card{padding:22px;background:linear-gradient(135deg,rgba(37,99,235,.08),rgba(124,58,237,.08));border:1px solid rgba(37,99,235,.14)}
    .score-card .score{font-size:44px;font-weight:800;margin:8px 0 4px}
    .score-card p{margin:0;color:var(--muted);line-height:1.7}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;border:0;background:#fff;padding:18px 20px;text-align:left;font-size:16px;font-weight:700;color:var(--text);display:flex;justify-content:space-between;align-items:center;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;background:linear-gradient(180deg,#fff,#f8fbff)}
    .faq-a div{padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{max-height:220px}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-card{padding:20px}
    .review-card h3{margin:0 0 8px;font-size:16px}
    .review-card .role{color:var(--primary);font-size:13px;font-weight:700;margin-bottom:10px}
    .review-card p{margin:0;color:var(--muted);line-height:1.75}
    .case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .case{padding:18px}
    .case h3{margin:0 0 8px;font-size:16px}
    .case p{margin:0;color:var(--muted);line-height:1.75}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article{padding:18px}
    .article .meta{font-size:13px;color:var(--primary);font-weight:700;margin-bottom:8px}
    .article h3{margin:0 0 10px;font-size:16px}
    .article p{margin:0;color:var(--muted);line-height:1.7}
    .contact-grid{display:grid;grid-template-columns:1fr .8fr;gap:16px}
    form{display:grid;gap:12px}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;font:inherit;color:var(--text);outline:none}
    textarea{min-height:128px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(37,99,235,.55);box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    .contact-box{padding:22px}
    .contact-info{display:grid;gap:12px}
    .contact-pill{padding:14px 16px;border-radius:16px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .contact-pill strong{display:block;margin-bottom:5px}
    .footer-nav{display:flex;flex-wrap:wrap;gap:10px 14px}
    footer{margin-top:14px;padding:22px 0 28px;border-top:1px solid var(--line);background:#f8fbff;color:#2b3851}
    footer a{color:#244ea6}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;min-width:52px;height:52px;padding:0 16px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(37,99,235,.24);font-weight:700}
    .float-qrcode{position:fixed;right:18px;bottom:82px;z-index:60;width:170px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);display:none}
    .float-qrcode img{border-radius:12px;width:100%;height:auto}
    .float-qrcode p{margin:8px 0 0;color:var(--muted);font-size:12px;line-height:1.5;text-align:center}
    .backtop{border:1px solid rgba(255,255,255,.22)}
    .muted{color:var(--muted)}
    .notice{font-size:13px;color:var(--muted);line-height:1.65}
    .image-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .media-card{padding:14px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .media-card img{width:100%;height:auto;border-radius:12px}
    .logo-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
    .logo-chip{padding:12px 10px;border-radius:14px;background:#fff;border:1px solid var(--line);text-align:center;font-size:13px;color:#31415f}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.compare-grid,.contact-grid,.reviews,.case-grid,.article-list,.cols-3,.cols-2{grid-template-columns:1fr}
      .service-list,.hero-stats,.logo-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
      nav{display:none}
      .menu-btn{display:inline-flex}
      nav.open{display:block;position:absolute;left:0;right:0;top:76px;background:rgba(251,252,255,.98);border-bottom:1px solid var(--line);padding:12px 18px}
      nav.open ul{justify-content:flex-start}
      .nav{position:relative}
      .hero-main{padding:24px}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .service-list,.hero-stats,.logo-strip,.image-row{grid-template-columns:1fr}
      .hero p,.section-head p,.section-card p,.case p,.article p,.review-card p{font-size:15px}
      .brand h2{font-size:16px}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .float-qrcode{width:150px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
    .reveal.show{opacity:1;transform:none}