:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#fbfcff;
      --text:#172033;
      --muted:#5c657a;
      --line:#dde3ef;
      --brand:#6b5cff;
      --brand-2:#20c997;
      --brand-3:#ff8a5b;
      --shadow:0 16px 40px rgba(23,32,51,.08);
      --radius:20px;
      --radius-sm: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;background:
      radial-gradient(circle at top left, rgba(107,92,255,.12), transparent 32%),
      radial-gradient(circle at top right, rgba(32,201,151,.10), transparent 28%),
      linear-gradient(180deg, #f9fbff 0%, #f6f7fb 42%, #f5f8ff 100%);
      color:var(--text);line-height:1.7}
    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:60;background:rgba(246,247,251,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(221,227,239,.78)}
    .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}
    .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand strong{display:block;font-size:18px;letter-spacing:.4px}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(107,92,255,.10)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.22s ease;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#8e77ff);color:#fff;box-shadow:0 12px 24px rgba(107,92,255,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(107,92,255,.28)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
    .hero{padding:34px 0 24px}
    .hero-wrap{position:relative;overflow:hidden;border:1px solid rgba(221,227,239,.9);border-radius:28px;background:
      linear-gradient(135deg, rgba(107,92,255,.08), rgba(32,201,151,.06) 42%, rgba(255,138,91,.06));
      box-shadow:var(--shadow)}
    .hero-wrap::before,.hero-wrap::after{content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
    .hero-wrap::before{width:320px;height:320px;background:radial-gradient(circle, rgba(107,92,255,.18), transparent 70%);top:-90px;right:-100px}
    .hero-wrap::after{width:260px;height:260px;background:radial-gradient(circle, rgba(32,201,151,.14), transparent 70%);bottom:-70px;left:-80px}
    .hero-grid{display:grid;grid-template-columns:1.3fr .9fr;gap:28px;align-items:center;padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.78);border:1px solid rgba(221,227,239,.9);color:#3b4560;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(32px,4.5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{max-width:700px;color:var(--muted);font-size:17px;margin:0 0 22px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .point{background:rgba(255,255,255,.82);border:1px solid rgba(221,227,239,.85);border-radius:18px;padding:14px 15px}
    .point b{display:block;font-size:15px;margin-bottom:4px}
    .point span{color:var(--muted);font-size:13px}
    .hero-card{background:rgba(255,255,255,.86);border:1px solid rgba(221,227,239,.92);border-radius:24px;padding:22px;box-shadow:0 14px 40px rgba(23,32,51,.08)}
    .hero-card h2{margin:0 0 10px;font-size:20px}
    .hero-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .hero-list li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--brand),var(--brand-2))}
    main{padding-bottom:8px}
    section{padding:22px 0}
    .section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:18px}
    .section-title h2{margin:0;font-size:clamp(24px,2.8vw,34px);line-height:1.15}
    .section-title p{margin:0;color:var(--muted);max-width:620px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 28px rgba(23,32,51,.05);padding:20px;transition:.24s ease}
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(23,32,51,.08)}
    .metric strong{display:block;font-size:30px;line-height:1.1;margin-bottom:8px}
    .metric span{color:var(--muted)}
    .chip-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#3d465e;font-size:13px}
    .service-card h3,.card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.card p{margin:0;color:var(--muted)}
    .service-card ul,.steps,.timeline{margin:14px 0 0;padding:0;list-style:none}
    .service-card li,.steps li,.timeline li{display:flex;gap:10px;align-items:flex-start;color:var(--muted);margin-bottom:10px}
    .num{flex:0 0 auto;width:28px;height:28px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(107,92,255,.12),rgba(32,201,151,.12));color:#3a3e67;font-weight:800}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:20px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f8faff;color:#2c354a;font-size:14px}
    td{color:var(--muted)}
    .rating{color:#f5a524;font-weight:800}
    .testimonial .name{font-weight:800;color:var(--text)}
    .testimonial .role{font-size:13px;color:var(--muted);margin-top:2px}
    .testimonial p{margin-top:12px}
    .case-box{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    .images-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .images-row img,.case-figure img{width:100%;border-radius:18px;border:1px solid var(--line);background:#fff}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .article-item span{color:var(--muted);font-size:13px}
    .faq{display:grid;gap:12px}
    .faq-item{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden}
    .faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;background:none;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;padding:0 18px;color:var(--muted);transition:max-height .28s ease,padding .28s ease}
    .faq-item.open .faq-a{max-height:180px;padding:0 18px 18px}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:.2s ease}
    .form-card form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(107,92,255,.55);box-shadow:0 0 0 4px rgba(107,92,255,.08)}
    footer{margin-top:18px;background:#f1f4fa;border-top:1px solid var(--line);color:#2d3648}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;padding:28px 0}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#33405b}
    .contact-box{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .qrcode{display:flex;gap:14px;align-items:center}
    .qrcode img{width:110px;height:110px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}
    .small{font-size:13px;color:var(--muted)}
    .topbar{display:none}
    .float-contact{position:fixed;right:18px;bottom:18px;z-index:70;display:grid;gap:10px}
    .float-contact a,.float-contact button{border:0;box-shadow:0 14px 30px rgba(23,32,51,.16)}
    .backtop{position:fixed;right:18px;bottom:82px;z-index:70;display:none}
    .backtop.show{display:block}
    .fade-up{opacity:0;transform:translateY(16px);transition:.6s ease}
    .fade-up.in{opacity:1;transform:translateY(0)}
    .tagline{display:flex;flex-wrap:wrap;gap:10px}
    .split-note{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .highlight{background:linear-gradient(135deg,rgba(107,92,255,.10),rgba(32,201,151,.10));border:1px solid rgba(107,92,255,.14)}
    .mobile-nav{display:none}
    @media (max-width: 980px){
      .hero-grid,.case-box,.footer-grid,.grid-4,.grid-3,.grid-2,.split-note{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-nav{display:none;padding:0 0 18px}
      .mobile-nav.open{display:block}
      .mobile-nav .nav-links{display:flex;flex-direction:column;align-items:stretch;gap:8px}
      .mobile-nav .nav-links a{background:#fff;border:1px solid var(--line)}
      .form-grid,.contact-box{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-cta .btn-ghost{display:none}
      .case-box .images-row{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{padding:0 14px}
      .hero{padding-top:18px}
      .hero-wrap{border-radius:22px}
      .hero-grid{padding:22px}
      .section-title{flex-direction:column;align-items:flex-start}
      .btn{width:100%}
      .nav{min-height:68px}
      .brand strong{font-size:16px}
      .qrcode{flex-direction:column;align-items:flex-start}
      .float-contact{right:12px;bottom:12px}
      .backtop{right:12px;bottom:76px}
    }