:root{
      --bg:#fff9e8;
      --panel:#ffffff;
      --panel-2:#fff4c7;
      --line:#eadfb2;
      --text:#1f2430;
      --muted:#5f6776;
      --brand:#ffcc1f;
      --brand-2:#ffb300;
      --brand-deep:#f59e0b;
      --shadow:0 18px 40px rgba(72, 52, 6, .10);
      --shadow-soft:0 10px 24px rgba(72, 52, 6, .08);
      --radius:20px;
      --radius-sm:14px;
      --container:1160px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,204,31,.18), transparent 26%),
        radial-gradient(circle at 85% 15%, rgba(255,179,0,.12), transparent 22%),
        linear-gradient(180deg,#fff8df 0%, #fffdf6 18%, #fffaf0 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:60;
      background:rgba(255,250,237,.86); backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(234,223,178,.7);
    }
    .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:44px; height:44px; object-fit:contain; border-radius:12px; background:#fff; padding:6px; box-shadow:var(--shadow-soft)}
    .brand strong{display:block; font-size:18px; letter-spacing:.4px}
    .brand span{display:block; 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; font-size:14px;
    }
    .nav-menu{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-menu a{font-size:14px; color:#3a4050; padding:8px 10px; border-radius:10px}
    .nav-menu a:hover{background:#fff3bc}
    .nav-cta{
      background:linear-gradient(135deg,var(--brand),#ffe27a);
      border:1px solid rgba(176,122,0,.16);
      padding:10px 14px; border-radius:12px; font-weight:700;
      box-shadow:0 10px 20px rgba(255,204,31,.22);
    }
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.metric,.quote,.timeline-item,.faq-item,.form-card,.article-item,.case-card,.compare,.tag-box{
      background:rgba(255,255,255,.88); border:1px solid rgba(234,223,178,.9);
      border-radius:var(--radius); box-shadow:var(--shadow-soft);
    }
    .hero-main{padding:30px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      background:#fff5c9; border:1px solid #f1df8b;
      color:#915c00; font-size:13px; padding:8px 12px; border-radius:999px;
    }
    h1{margin:16px 0 12px; font-size:clamp(30px, 5vw, 54px); line-height:1.08}
    .hero p{margin:0; color:var(--muted); line-height:1.8}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      min-height:46px; padding:0 18px; border-radius:14px; border:1px solid transparent;
      font-weight:700; transition:.2s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand-2),var(--brand)); color:#251900; box-shadow:0 12px 24px rgba(255,179,0,.24)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn:hover,.nav-menu a:hover,.metric:hover,.card:hover,.case-card:hover,.article-item:hover,.quote:hover,.timeline-item:hover{transform:translateY(-2px)}
    .hero-side{padding:22px; display:flex; flex-direction:column; gap:14px; justify-content:space-between}
    .hero-side .stat-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .mini-stat{padding:16px; border-radius:16px; background:linear-gradient(180deg,#fffceb,#fff7d5); border:1px solid #f0df9a}
    .mini-stat b{display:block; font-size:24px; margin-bottom:6px}
    .mini-stat span{font-size:13px; color:var(--muted)}
    .hero-points{display:grid; gap:10px}
    .point{display:flex; gap:10px; align-items:flex-start; color:#34404f; font-size:14px}
    .point i{width:22px; height:22px; flex:0 0 22px; border-radius:50%; background:#ffe27b; display:inline-flex; align-items:center; justify-content:center; font-style:normal}
    section{padding:18px 0}
    .section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:14px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:clamp(22px, 3vw, 32px)}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:720px}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .metric,.card,.quote,.case-card,.article-item,.form-card,.panel,.compare{padding:18px}
    .metric .num{font-size:28px; font-weight:800; color:#202635}
    .metric .label{color:var(--muted); font-size:14px}
    .metric .sub{margin-top:8px; font-size:13px; color:#6a7282}
    .card h3,.case-card h3,.quote h3,.article-item h3,.panel h3,.form-card h3,.compare h3{margin:0 0 10px; font-size:18px}
    .card p,.case-card p,.quote p,.article-item p,.panel p,.form-card p{margin:0; color:var(--muted); line-height:1.75}
    .chip-row{display:flex; flex-wrap:wrap; gap:10px}
    .chip{padding:8px 10px; border-radius:999px; background:#fff7d8; border:1px solid #f0df9f; font-size:13px; color:#6a4d00}
    .process{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff, #fff9e8); border:1px solid #eadfb2}
    .step b{display:inline-flex; width:34px; height:34px; align-items:center; justify-content:center; border-radius:12px; background:#ffdf68; margin-bottom:12px}
    .compare-wrap{overflow-x:auto}
    table{width:100%; border-collapse:collapse; min-width:820px}
    th,td{padding:14px 12px; border-bottom:1px solid #f0e5bf; text-align:left; vertical-align:top}
    th{background:#fff7d8; color:#433300}
    .rating{display:flex; gap:4px; color:#ffb300; font-size:18px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; border:0; background:transparent; padding:18px; text-align:left; font:inherit;
      display:flex; justify-content:space-between; gap:12px; cursor:pointer; color:var(--text); font-weight:700;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .25s ease; padding:0 18px}
    .faq-item.open .faq-a{max-height:220px; padding-bottom:18px}
    .faq-item.open .faq-q .arrow{transform:rotate(45deg)}
    .arrow{transition:.2s ease}
    .review{display:grid; gap:12px}
    .quote small{color:#8b6a17; font-weight:700}
    .tags{display:flex; flex-wrap:wrap; gap:10px}
    .tag-box{padding:14px 16px}
    .tag-box .tags .chip{background:#fff; color:#47505f}
    .network{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .network .panel ul{margin:0; padding-left:18px; color:var(--muted); line-height:1.8}
    .article-list{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .article-item time{display:inline-block; margin-bottom:10px; color:#8a6b10; font-size:13px}
    .footer{
      padding:24px 0 30px; color:#24303f;
    }
    .footer .footer-inner{
      background:#fffaf0; border:1px solid #eadfb2; border-radius:24px; padding:22px;
    }
    .footer a{color:#24303f}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 10px; border-radius:10px; background:#fff; border:1px solid #efe2b4}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:70; display:grid; gap:10px;
    }
    .floating a,.floating button{
      border:0; border-radius:999px; padding:12px 16px; font-weight:700; box-shadow:var(--shadow);
    }
    .float-contact{background:linear-gradient(135deg,#ffcf26,#ffe98d); color:#241800}
    .float-top{background:#fff; color:#2b3240; border:1px solid var(--line)}
    .sidebar-card{display:grid; gap:14px}
    .form{display:grid; gap:12px}
    .field{display:grid; gap:8px}
    .field label{font-weight:700; font-size:14px}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid #e4d7aa; background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none;
    }
    .field textarea{min-height:120px; resize:vertical}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .note{font-size:13px; color:var(--muted); line-height:1.7}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.network,.article-list{grid-template-columns:1fr 1fr}
      .hero-main{padding:24px}
    }
    @media (max-width: 720px){
      .nav-toggle{display:inline-flex}
      .nav-menu{display:none; width:100%; padding-top:10px}
      .nav-menu.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.network,.article-list,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .mobile-only{display:inline-flex}
      .floating{right:12px; bottom:12px}
      .floating a,.floating button{padding:11px 14px}
    }
    .reveal{opacity:0; transform:translateY(14px); transition:.5s ease}
    .reveal.show{opacity:1; transform:none}