:root{
      --bg:#f4f7fb;
      --surface:#ffffff;
      --surface-2:#eef4ff;
      --text:#132033;
      --muted:#5d6b80;
      --line:rgba(19,32,51,.10);
      --primary:#2563eb;
      --primary-2:#7c3aed;
      --accent:#06b6d4;
      --warm:#ffb84d;
      --shadow:0 18px 50px rgba(31, 61, 112, .10);
      --shadow-sm:0 10px 24px rgba(31, 61, 112, .08);
      --radius:22px;
      --radius-sm:16px;
      --max: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(124,58,237,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(37,99,235,.12), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, var(--bg) 38%, #f8fafc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:40;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(244,247,251,.78);
      border-bottom:1px solid rgba(19,32,51,.06);
    }
    .nav{
      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:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:var(--shadow-sm)}
    .brand h2{margin:0; font-size:18px; line-height:1.1}
    .brand p{margin:2px 0 0; font-size:12px; color:var(--muted)}
    .nav-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); border-radius:12px; padding:10px 12px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:var(--muted); padding:8px 10px; border-radius:10px}
    .nav-links a:hover,.nav-links a.active{background:rgba(37,99,235,.09); color:var(--primary)}
    .hero{
      padding:34px 0 26px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.1fr .9fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.step,.service-card,.mini-card,.case-card,.news-card,.price-card,.timeline-card,.form-card,.compare-wrap{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(19,32,51,.08);
      box-shadow:var(--shadow-sm);
      border-radius:var(--radius);
    }
    .hero-main{padding:32px; position:relative; overflow:hidden}
    .hero-main::before{
      content:""; position:absolute; inset:-40px -80px auto auto; width:220px; height:220px;
      background:radial-gradient(circle, rgba(37,99,235,.20), transparent 65%);
      transform:rotate(18deg);
    }
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:rgba(124,58,237,.10); color:#5b21b6; font-size:13px; font-weight:700}
    h1{margin:18px 0 14px; font-size:clamp(30px, 4.2vw, 52px); line-height:1.08; letter-spacing:-.03em}
    .hero-main p{margin:0; color:var(--muted); font-size:16px; line-height:1.85; max-width:62ch}
    .cta-row{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px; border-radius:14px;
      padding:12px 18px; font-weight:700; border:1px solid transparent; transition:.25s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff; box-shadow:0 10px 24px rgba(37,99,235,.22)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn:hover{transform:translateY(-2px); box-shadow:var(--shadow-sm)}
    .hero-badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:20px}
    .chip{padding:9px 12px; border-radius:999px; background:#f7f9ff; border:1px solid rgba(37,99,235,.12); color:#28406a; font-size:13px}
    .hero-side{padding:24px; display:grid; gap:14px}
    .stat-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .stat{padding:16px; border-radius:18px; background:linear-gradient(180deg,#fff, #f6f9ff); border:1px solid rgba(19,32,51,.08)}
    .stat strong{display:block; font-size:24px; line-height:1.1}
    .stat span{display:block; margin-top:6px; font-size:13px; color:var(--muted)}
    .side-note{padding:16px; border-radius:18px; background:linear-gradient(135deg, rgba(6,182,212,.10), rgba(37,99,235,.10)); border:1px solid rgba(6,182,212,.16)}
    .section{padding:20px 0}
    .section h2{margin:0 0 12px; font-size:28px; line-height:1.15}
    .section .sub{margin:0 0 18px; color:var(--muted); line-height:1.8}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .card,.service-card,.step,.review,.case-card,.news-card,.faq-item,.mini-card,.price-card,.timeline-card,.form-card{padding:20px}
    .card h3,.service-card h3,.step h3,.review h3,.case-card h3,.news-card h3,.mini-card h3,.price-card h3,.timeline-card h3{margin:0 0 10px; font-size:18px}
    .card p,.service-card p,.step p,.review p,.case-card p,.news-card p,.mini-card p,.price-card p,.timeline-card p{margin:0; color:var(--muted); line-height:1.75}
    .section-band{background:linear-gradient(180deg, rgba(37,99,235,.06), rgba(124,58,237,.04)); border-top:1px solid rgba(19,32,51,.05); border-bottom:1px solid rgba(19,32,51,.05)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 12px; border-radius:999px; background:#fff; border:1px solid rgba(19,32,51,.08); color:#29405f; font-size:13px}
    .timeline{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .timeline-card .index{display:inline-flex; width:32px; height:32px; align-items:center; justify-content:center; border-radius:999px; background:rgba(37,99,235,.12); color:var(--primary); font-weight:800; margin-bottom:12px}
    .compare-wrap{padding:20px; overflow:hidden}
    .compare-scroll{overflow-x:auto}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:14px 12px; border-bottom:1px solid rgba(19,32,51,.08); text-align:left; vertical-align:top}
    th{color:#1f2e45; background:#f8fbff}
    td{color:var(--muted)}
    .rating{font-weight:800; color:#1f3fbf}
    .faq-list{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; border:0; background:transparent; color:var(--text); text-align:left;
      padding:18px 20px; font-size:16px; font-weight:700; display:flex; justify-content:space-between; gap:16px; cursor:pointer
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-item.open .faq-a{padding-bottom:18px; max-height:180px}
    .faq-item.open .faq-q .icon{transform:rotate(45deg)}
    .faq-q .icon{transition:.2s ease; color:var(--primary)}
    .review-meta{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:10px}
    .stars{color:#f59e0b; letter-spacing:2px}
    .service-card{position:relative; overflow:hidden}
    .service-card::after{
      content:""; position:absolute; inset:auto -20px -20px auto; width:90px; height:90px;
      border-radius:50%; background:radial-gradient(circle, rgba(37,99,235,.14), transparent 70%);
    }
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:grid; gap:8px}
    label{font-size:14px; color:#34475f; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid rgba(19,32,51,.12); background:#fff; color:var(--text);
      border-radius:14px; padding:12px 14px; font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(37,99,235,.52); box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:16px}
    .contact-box{display:grid; gap:14px}
    .contact-line{display:flex; flex-wrap:wrap; gap:10px; color:var(--muted)}
    .kefu{width:150px; border-radius:16px; border:1px solid rgba(19,32,51,.08); box-shadow:var(--shadow-sm)}
    .footer{
      margin-top:18px; padding:26px 0 28px; background:#eef3fb; border-top:1px solid rgba(19,32,51,.06); color:#22324a
    }
    .footer a{color:#203f8b}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px; align-items:start}
    .footer small{color:#5a6780}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:50; display:grid; gap:10px
    }
    .float-btn{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff; box-shadow:var(--shadow); border:0; cursor:pointer
    }
    .float-panel{
      position:fixed; right:16px; bottom:82px; z-index:49; width:min(320px, calc(100vw - 32px));
      background:#fff; border:1px solid rgba(19,32,51,.10); border-radius:20px; box-shadow:var(--shadow); padding:16px; display:none
    }
    .float-panel.open{display:block}
    .float-panel img{width:100%; height:auto; border-radius:14px; margin:10px 0}
    .float-panel p{margin:0; color:var(--muted); line-height:1.7}
    .reveal{opacity:0; transform:translateY(14px); transition:.5s ease}
    .reveal.in{opacity:1; transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.timeline,.footer-grid{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; top:64px; left:16px; right:16px; padding:12px; flex-direction:column; align-items:stretch;
        background:#fff; border:1px solid rgba(19,32,51,.08); border-radius:18px; box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px; background:#f8fbff}
      .form-grid{grid-template-columns:1fr}
      .hero-main{padding:24px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .section h2{font-size:24px}
      .hero{padding-top:22px}
      h1{font-size:clamp(28px, 8vw, 40px)}
      .stat-grid{grid-template-columns:1fr}
    }