:root{
      --bg:#fff9ea;
      --panel:#ffffff;
      --panel-2:#fff5cb;
      --text:#1f2a37;
      --muted:#5d6778;
      --line:#eadfa7;
      --brand:#f4b400;
      --brand-2:#ffcf3a;
      --accent:#ff8a00;
      --shadow:0 16px 40px rgba(87, 63, 0, .10);
      --shadow-soft:0 10px 24px rgba(87, 63, 0, .08);
      --radius:20px;
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255, 214, 77, .22), transparent 26%),
        radial-gradient(circle at 85% 0%, rgba(255, 186, 0, .15), transparent 24%),
        linear-gradient(180deg, #fffdf7 0%, var(--bg) 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(12px);
      background:rgba(255,252,243,.82);
      border-bottom:1px solid rgba(234,223,167,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;padding:10px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:10px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.2}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:#374151;padding:8px 10px;border-radius:999px;transition:.22s ease}
    .nav-links a:hover,.nav-links a.active{background:#fff0ab;color:#1c2430}
    .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;transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      cursor:pointer;white-space:nowrap;
    }
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:0 12px 24px rgba(244,180,0,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:#2b3340}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center}
    .menu-toggle span{display:block;width:18px;height:2px;background:#263042;position:relative}
    .menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#263042}
    .menu-toggle span::before{top:-6px}.menu-toggle span::after{top:6px}
    .hero{
      padding:56px 0 26px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .85fr;gap:20px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.section-card,.quote-card,.faq-item,.article-card,.review-card,.step-card,.case-card,.compare-card,.form-card{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(234,223,167,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before{
      content:"";position:absolute;inset:auto -18% -30% auto;width:360px;height:360px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,207,58,.34), rgba(255,207,58,0) 68%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:#fff5c8;color:#8a5a00;font-weight:700;font-size:13px;border:1px solid #ffe08a;
    }
    h1{font-size:clamp(34px,5vw,56px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.03em}
    .hero-desc{font-size:16px;line-height:1.8;color:var(--muted);max-width:62ch;margin:0 0 22px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .mini-stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#fff 0%, #fff9df 100%);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:22px}
    .mini-stat span{display:block;margin-top:4px;font-size:13px;color:var(--muted);line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .signal{
      padding:18px;border-radius:18px;background:linear-gradient(135deg,#fff7d8 0%, #fff 100%);border:1px solid #f3df97
    }
    .signal h3,.section-head h2{margin:0 0 8px;font-size:24px}
    .signal p{margin:0;color:var(--muted);line-height:1.7}
    .chip-wrap{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fffdf1;border:1px solid var(--line);font-size:13px;color:#374151}
    .floating-card{padding:18px;border-radius:18px;background:linear-gradient(135deg,#111827 0%, #243043 100%);color:#fff}
    .floating-card p{margin:0;color:#f6e9a8;line-height:1.7}
    .floating-card strong{display:block;font-size:20px;margin-bottom:8px;color:#fff}
    main{padding-bottom:10px}
    section{padding:20px 0}
    .section-card{padding:28px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:20px}
    .section-head p{margin:0;color:var(--muted);max-width:58ch;line-height:1.7}
    .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}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .card{padding:20px}
    .card h3,.card h4{margin:0 0 8px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,#fff0b6,#ffd34b);color:#8a5a00;font-weight:900
    }
    .metric{font-size:30px;font-weight:900;letter-spacing:-.03em}
    .metric-sub{font-size:13px;color:var(--muted);margin-top:6px}
    .timeline{display:grid;gap:12px}
    .step-card{padding:18px;display:flex;gap:14px;align-items:flex-start}
    .step-num{min-width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#ffe176;color:#7f5300;font-weight:800}
    .step-card h4{margin:0 0 6px;font-size:16px}
    .step-card p{margin:0;color:var(--muted);line-height:1.7}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #f0e6bb;vertical-align:top}
    th{background:#fff6d1;color:#4b3a00;font-size:14px}
    td{color:#334155;font-size:14px;line-height:1.7}
    .good{color:#0f766e;font-weight:700}
    .rating{
      display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center
    }
    .stars{color:#f59e0b;font-size:20px;letter-spacing:2px}
    .accent-box{
      padding:18px;border-radius:18px;background:linear-gradient(135deg,#fff2a8 0%, #fff 65%);border:1px solid #f0df92
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:10px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#334155}
    .gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .gallery .imgbox{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .gallery img{width:100%;height:auto}
    .review-card{padding:20px}
    .review-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
    .avatar{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#ffd34b,#ff8a00)}
    .review-name{font-weight:800}
    .review-role{font-size:12px;color:var(--muted);margin-top:3px}
    .quote{color:#334155;line-height:1.8;margin:0}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:800;color:#1f2937;
      display:flex;align-items:center;justify-content:space-between;gap:14px;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:220px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8}
    .form-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#374151}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:border-color .2s ease, box-shadow .2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#f4b400;box-shadow:0 0 0 4px rgba(244,180,0,.12)}
    .full{grid-column:1 / -1}
    .footer{
      margin-top:12px;
      background:#fff8dd;border-top:1px solid var(--line);color:#2b3340;
    }
    .footer .container{padding:22px 0}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer small,.footer p,.footer a{color:#384152}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .contact-line{display:grid;gap:8px}
    .bottom-note{margin-top:16px;padding-top:14px;border-top:1px dashed #eadfa7;font-size:13px;color:#616b7b}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .tool{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,#fff 0%, #fff3bf 100%);border:1px solid var(--line);box-shadow:var(--shadow-soft)
    }
    .back-top{display:none}
    .mobile-panel{display:none}
    .fade-up{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .fade-up.in{opacity:1;transform:translateY(0)}
    .subtle-line{height:1px;background:linear-gradient(90deg,transparent, rgba(234,223,167,.9), transparent);margin:18px 0}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.gallery,.footer-grid,.rating,.form-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel{
        display:none;padding:0 0 16px
      }
      .mobile-panel.open{display:block}
      .mobile-panel .nav-links{display:flex;flex-direction:column;align-items:stretch;gap:8px}
      .mobile-panel .nav-links a{background:#fff;border:1px solid var(--line)}
      .hero{padding-top:28px}
    }
    @media (max-width: 640px){
      .hero-main,.hero-side,.section-card,.form-card{padding:20px}
      .hero-points{grid-template-columns:1fr}
      h1{font-size:clamp(30px,10vw,40px)}
      .section-head{flex-direction:column;align-items:flex-start}
      .float-tools{right:12px;bottom:12px}
      .tool{width:44px;height:44px;border-radius:14px}
    }