:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#fbfcff;
      --text:#182033;
      --muted:#5f6b86;
      --line:#e5e9f4;
      --primary:#5b7cfa;
      --primary-2:#8b5cf6;
      --accent:#ff7a59;
      --accent-2:#14b8a6;
      --shadow:0 18px 45px rgba(24,32,51,.08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      background:
        radial-gradient(circle at 20% 0%, rgba(91,124,250,.12), transparent 24%),
        radial-gradient(circle at 90% 10%, rgba(255,122,89,.10), transparent 20%),
        linear-gradient(180deg,#f8faff 0%, #f6f8fc 46%, #f7f8fc 100%);
      color:var(--text);
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:60;
      backdrop-filter:blur(14px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(229,233,244,.75);
    }
    .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;border:1px solid var(--line);padding:4px;box-shadow:0 8px 20px rgba(24,32,51,.06)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#33405f;padding:8px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:3px;width:0;height:2px;border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--accent));transition:.25s ease;
    }
    .nav-links a:hover::after{width:100%}
    .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;font-size:14px;transition:.25s ease;cursor:pointer;
      box-shadow:none;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 12px 24px rgba(91,124,250,.18)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(91,124,250,.23)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#cdd6ee;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer}
    .menu-toggle span{display:block;width:18px;height:2px;background:#34415f;position:relative;border-radius:999px}
    .menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#34415f;border-radius:999px}
    .menu-toggle span::before{top:-6px}.menu-toggle span::after{top:6px}

    .hero{padding:28px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.form-card,.faq-card,.review-card,.article-card,.case-card,.compare-card,.quote-card{
      background:var(--panel);border:1px solid rgba(229,233,244,.95);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{
      padding:34px;position:relative;overflow:hidden;
      background:
        radial-gradient(circle at top right, rgba(139,92,246,.12), transparent 22%),
        radial-gradient(circle at bottom left, rgba(20,184,166,.10), transparent 20%),
        linear-gradient(180deg,#fff 0%, #fbfcff 100%);
    }
    .hero-main::before{
      content:"";position:absolute;inset:auto -48px -60px auto;width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(91,124,250,.15), rgba(91,124,250,0) 68%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:#f0f4ff;color:#3b56d6;font-weight:700;font-size:13px;
      border:1px solid #dce5ff;
    }
    h1{margin:16px 0 12px;font-size:clamp(30px,4.6vw,52px);line-height:1.08;letter-spacing:-.02em}
    .hero-lead{margin:0;color:#3e4a66;font-size:16px;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{
      padding:14px 15px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8faff);
      border:1px solid var(--line);color:#33405f
    }
    .point strong{display:block;color:var(--text);font-size:16px;margin-bottom:4px}
    .hero-side{padding:20px;display:grid;gap:14px;align-content:start}
    .mini-stat{
      padding:18px;border-radius:18px;background:linear-gradient(135deg,#f7f9ff,#ffffff);
      border:1px solid var(--line)
    }
    .mini-stat .label{font-size:13px;color:var(--muted)}
    .mini-stat .value{font-size:28px;font-weight:800;margin:4px 0;color:#1e2b4d}
    .mini-stat .desc{font-size:13px;color:#51607d}
    .quick-list{display:grid;gap:10px}
    .quick-item{display:flex;gap:10px;align-items:flex-start;padding:12px 0;border-top:1px dashed #e6ebf6}
    .quick-item:first-child{border-top:0;padding-top:0}
    .bullet{width:10px;height:10px;border-radius:50%;margin-top:7px;background:linear-gradient(135deg,var(--accent),var(--primary))}
    .quick-item h3{margin:0 0 4px;font-size:15px}
    .quick-item p{margin:0;color:var(--muted);font-size:13px}

    section{padding:18px 0}
    .section-card{padding:26px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .card{
      background:linear-gradient(180deg,#fff 0%, #fbfcff 100%);
      border:1px solid var(--line);border-radius:20px;padding:18px;transition:.25s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(24,32,51,.08)}
    .metric .num{font-size:28px;font-weight:800;color:#203053;margin:10px 0 4px}
    .metric .txt{color:var(--muted);font-size:13px}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(91,124,250,.14),rgba(255,122,89,.14));color:#3046c7;font-weight:800
    }
    .service-title{display:flex;align-items:center;gap:12px;margin-bottom:10px}
    .service-title h3{margin:0;font-size:18px}
    .service-card p,.case-card p,.article-card p,.review-card p{margin:0;color:var(--muted)}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:8px 12px;border-radius:999px;background:#f4f7ff;border:1px solid #e1e7fb;color:#33415f;font-size:13px
    }
    .flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line);position:relative}
    .step .idx{
      width:34px;height:34px;border-radius:12px;display:grid;place-items:center;margin-bottom:12px;
      background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800
    }
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:13px}

    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:920px;background:#fff}
    th,td{padding:14px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#f5f8ff;color:#243252;font-size:14px}
    td{color:#37435e;font-size:14px}
    .score{
      display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;background:#effaf4;color:#13724d;font-weight:700
    }
    .star{color:#ffb400}
    .comparison-note{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
    .note-pill{padding:10px 12px;border-radius:14px;background:#fff8f3;border:1px solid #fde0cf;color:#7d4b2c}

    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .form-card{padding:26px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .form-field{display:grid;gap:8px}
    .form-field label{font-size:14px;font-weight:700;color:#30405d}
    input,select,textarea{
      width:100%;border:1px solid #dbe2f1;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none;transition:.2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#96a9ff;box-shadow:0 0 0 4px rgba(91,124,250,.10)}
    .full{grid-column:1/-1}
    .submit-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:16px}
    .helpbox{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .helpbox h3{margin:0 0 10px;font-size:18px}
    .helpbox ul{margin:0;padding-left:18px;color:#40506d}
    .helpbox li{margin:7px 0}
    .faq-list{display:grid;gap:12px}
    .faq-item{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden}
    .faq-q{
      width:100%;padding:16px 18px;background:#fff;border:0;text-align:left;font:inherit;font-weight:700;color:#203053;
      display:flex;justify-content:space-between;align-items:center;cursor:pointer
    }
    .faq-q span{color:var(--primary);font-size:22px;line-height:1}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;background:#fbfcff}
    .faq-a div{padding:0 18px 16px;color:var(--muted)}
    .faq-item.active .faq-a{max-height:220px}
    .faq-item.active .faq-q{border-bottom:1px solid var(--line)}
    .reviews,.cases,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .review-card,.case-card,.article-card{padding:20px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;color:#41506d;font-size:13px}
    .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#dfe7ff,#f6d5ff);display:grid;place-items:center;font-weight:800;color:#2940a6}
    .article-card .meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
    .meta .chip{padding:6px 10px;border-radius:999px;background:#f3f6ff;color:#435170;font-size:12px}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .timeline .card{position:relative}
    .timeline .card::before{
      content:"";position:absolute;top:18px;right:18px;width:38px;height:38px;border-radius:12px;
      background:linear-gradient(135deg,rgba(20,184,166,.14),rgba(91,124,250,.14))
    }
    .service-network{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .network-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .network-item{padding:15px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .footer{
      margin-top:18px;padding:26px 0 34px;border-top:1px solid rgba(229,233,244,.95);
      background:#f3f6fd;color:#25314b
    }
    .footer a{color:#2748c7}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px;align-items:start}
    .footer .brand p,.footer p,.footer li{color:#51607d}
    .footer ul{margin:0;padding-left:18px}
    .footer li{margin:8px 0}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:70;display:grid;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 12px 24px rgba(91,124,250,.24)
    }
    .customer-float{
      position:fixed;left:18px;bottom:18px;z-index:70;
      width:min(320px,calc(100vw - 36px));
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden
    }
    .customer-float header{
      padding:12px 14px;background:linear-gradient(135deg,#f4f7ff,#fff7fb);display:flex;justify-content:space-between;align-items:center;gap:10px
    }
    .customer-float .body{padding:14px;display:grid;gap:12px}
    .customer-float .contact-row{display:flex;gap:10px;align-items:center}
    .customer-float .qr{
      width:88px;height:88px;border-radius:14px;object-fit:cover;border:1px solid var(--line)
    }
    .scroll-top{display:none}
    .fade-in{opacity:0;transform:translateY(14px);transition:.6s ease}
    .fade-in.show{opacity:1;transform:none}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:0 12px 24px rgba(24,32,51,.08)}
    .image-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .center{text-align:center}
    .divider{height:1px;background:linear-gradient(90deg,transparent,#dfe5f3,transparent);margin:18px 0}
    .mobile-only{display:none}

    @media (max-width: 980px){
      .hero-grid,.split,.service-network,.footer-grid,.grid-4,.grid-3,.reviews,.cases,.articles,.timeline,.flow{grid-template-columns:1fr 1fr}
      .hero-main{padding:24px}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav-links.open{
        display:flex;position:absolute;left:16px;right:16px;top:76px;
        background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:10px
      }
      .nav{position:relative}
      .nav-cta{display:none}
      .mobile-only{display:block}
      .floating{right:12px;bottom:12px}
      .customer-float{left:12px;bottom:12px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 24px))}
      .hero-grid,.split,.service-network,.footer-grid,.grid-4,.grid-3,.reviews,.cases,.articles,.timeline,.flow,.hero-points,.form-grid,.image-row{grid-template-columns:1fr}
      .hero-main{padding:20px}
      .section-card,.form-card{padding:18px}
      h1{font-size:30px}
      .section-head h2{font-size:24px}
      .customer-float{display:none}
      .floating{flex-direction:row;gap:8px}
      .float-btn{width:44px;height:44px;border-radius:14px}
      .btn{padding:11px 15px}
    }