:root{
      --bg:#fffdf6;
      --panel:#ffffff;
      --panel-2:#fff7d8;
      --line:#f0e3a6;
      --text:#1f2a37;
      --muted:#5b6777;
      --brand:#f6c400;
      --brand-2:#ffdd55;
      --brand-deep:#c79000;
      --accent:#ffb300;
      --shadow:0 18px 50px rgba(153, 111, 0, .12);
      --radius:22px;
      --maxw:1200px;
    }
    *{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(246,196,0,.16), transparent 26%),
        radial-gradient(circle at top right, rgba(255,221,85,.18), transparent 24%),
        linear-gradient(180deg, #fffef8 0%, #fff9e6 55%, #fffdf6 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--maxw),calc(100% - 32px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:30;
      backdrop-filter:blur(14px);
      background:rgba(255,252,242,.86);
      border-bottom:1px solid rgba(240,227,166,.85);
    }
    .header-inner{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:12px 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;border:1px solid var(--line);padding:4px;box-shadow:0 8px 20px rgba(0,0,0,.05)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;letter-spacing:.4px}
    .brand-text span{display:block;color:var(--muted);font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;padding:10px 12px;border-radius:14px;color:var(--text)
    }
    .nav{
      display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{
      padding:9px 11px;border-radius:999px;color:var(--text);font-size:.92rem;
      transition:.22s ease;background:transparent
    }
    .nav a:hover,.nav a:focus-visible{background:var(--panel-2);transform:translateY(-1px)}
    .nav .btn{
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#3d2a00;font-weight:700;border:1px solid rgba(180,131,0,.18)
    }
    .hero{
      padding:34px 0 18px;
    }
    .hero-shell{
      display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch
    }
    .hero-card,.side-card,.section-card,.review-card,.case-card,.service-card,.faq-item,.article-card,.metric,.price-card,.timeline-item,.compare-card,.network-card,.help-card,.form-card{
      background:var(--panel);border:1px solid rgba(240,227,166,.95);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-card{padding:28px;position:relative;overflow:hidden}
    .hero-card:before{
      content:"";position:absolute;inset:auto -70px -80px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(246,196,0,.20), rgba(246,196,0,0) 65%);
      pointer-events:none
    }
    .kicker{
      display:inline-flex;align-items:center;gap:8px;background:#fff8d4;color:#8a6100;border:1px solid #f0dc8a;
      padding:8px 12px;border-radius:999px;font-weight:700;font-size:.9rem
    }
    .kicker i{width:8px;height:8px;border-radius:50%;background:var(--brand-deep);display:inline-block;box-shadow:0 0 0 4px rgba(199,144,0,.12)}
    h1{margin:16px 0 14px;font-size:clamp(2rem,4vw,3.7rem);line-height:1.08;letter-spacing:-.02em}
    .hero-card p{margin:0;color:var(--muted);font-size:1.02rem;line-height:1.85;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;
      padding:13px 18px;border-radius:14px;font-weight:800;transition:.22s ease;box-shadow:none
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#3d2a00}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn:hover,.btn:focus-visible{transform:translateY(-2px);box-shadow:0 12px 30px rgba(175,129,0,.16)}
    .hero-meta{
      display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px
    }
    .metric{padding:16px}
    .metric strong{display:block;font-size:1.2rem}
    .metric span{display:block;color:var(--muted);font-size:.88rem;margin-top:6px;line-height:1.5}
    .side-card{padding:22px;display:flex;flex-direction:column;gap:16px}
    .side-card .panel-title{margin:0;font-size:1.05rem}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:8px 11px;border-radius:999px;background:#fff8da;border:1px solid #f2dea0;color:#7a5600;font-size:.88rem
    }
    .mini-list{display:grid;gap:10px}
    .mini-list div{padding:11px 12px;border-radius:14px;background:#fffdfa;border:1px solid #f2e7ba;color:#394452}
    .section{padding:18px 0}
    .section-card{padding:24px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:clamp(1.35rem,2.3vw,2rem)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.8}
    .intro-grid,.service-grid,.review-grid,.case-grid,.article-grid,.network-grid,.compare-grid,.help-grid{display:grid;gap:14px}
    .intro-grid{grid-template-columns:1fr 1fr}
    .intro-box{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #fffdf2);border:1px solid #f3e5aa}
    .intro-box h3,.service-card h3,.case-card h3,.review-card h3,.article-card h3,.help-card h3,.price-card h3,.compare-card h3{margin:0 0 10px;font-size:1.03rem}
    .intro-box p,.service-card p,.case-card p,.review-card p,.article-card p,.help-card p,.price-card p,.compare-card p{margin:0;color:var(--muted);line-height:1.8}
    .service-grid{grid-template-columns:repeat(3,1fr)}
    .service-card,.case-card,.review-card,.article-card,.help-card,.price-card,.compare-card,.network-card,.timeline-item{
      padding:18px;transition:.22s ease
    }
    .service-card:hover,.case-card:hover,.review-card:hover,.article-card:hover,.help-card:hover,.price-card:hover,.compare-card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(153,111,0,.14)}
    .badge{
      display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:700;color:#8a6100;background:#fff8d8;border:1px solid #f1dd92;padding:6px 10px;border-radius:999px;margin-bottom:10px
    }
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .flow .step{position:relative;overflow:hidden}
    .flow .step .num{
      width:36px;height:36px;border-radius:12px;display:grid;place-items:center;font-weight:900;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#3d2a00;margin-bottom:12px
    }
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid #efd98d}
    table{width:100%;border-collapse:collapse;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid #f4e7b8;text-align:left;vertical-align:top;line-height:1.7}
    th{background:#fff8da;color:#7a5600;font-weight:800}
    tr:nth-child(even) td{background:#fffdf6}
    .two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start}
    .timeline-item .dot{width:12px;height:12px;border-radius:50%;margin-top:7px;background:var(--brand-deep);box-shadow:0 0 0 6px rgba(199,144,0,.12)}
    .compare-grid{grid-template-columns:1fr 1fr}
    .compare-card .rating{font-size:2rem;font-weight:900;color:#8a6100;margin:10px 0}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-item button{
      width:100%;padding:18px;border:none;background:transparent;color:var(--text);font:inherit;font-weight:800;text-align:left;cursor:pointer;
      display:flex;align-items:center;justify-content:space-between;gap:16px
    }
    .faq-item .answer{max-height:0;overflow:hidden;transition:max-height .26s ease;padding:0 18px}
    .faq-item .answer p{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .answer{max-height:220px}
    .faq-item .icon{font-style:normal;color:var(--brand-deep)}
    .review-grid{grid-template-columns:repeat(3,1fr)}
    .review-card .role{color:#8a6100;font-size:.88rem;font-weight:700;margin-bottom:10px}
    .case-grid{grid-template-columns:repeat(3,1fr)}
    .article-grid{grid-template-columns:repeat(3,1fr)}
    .article-card .meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
    .article-card .meta span,.price-card .meta span{
      font-size:.82rem;color:#7a5600;background:#fff8d8;border:1px solid #f1dd92;padding:6px 9px;border-radius:999px
    }
    .network-grid{grid-template-columns:repeat(4,1fr)}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price-card ul,.help-card ul{margin:12px 0 0;padding-left:18px;color:var(--muted);line-height:1.9}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-weight:700;color:#394452}
    input,select,textarea{
      width:100%;border:1px solid #eedf9b;background:#fffdf7;color:var(--text);padding:13px 14px;border-radius:14px;font:inherit;outline:none;
    }
    textarea{min-height:124px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#e1b400;box-shadow:0 0 0 4px rgba(246,196,0,.12)}
    .full{grid-column:1/-1}
    .contact-box{
      display:grid;grid-template-columns:1fr 260px;gap:16px;align-items:start
    }
    .qr{
      padding:14px;border-radius:18px;background:#fffdf7;border:1px solid #f2e4a8;text-align:center
    }
    .qr img{width:100%;height:auto;border-radius:14px;object-fit:cover}
    .footer{
      margin-top:22px;background:#fff8dd;border-top:1px solid #efd98d;color:#314051
    }
    .footer-inner{padding:24px 0}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .footer a{color:#284b7a}
    .footer small{color:#5d6978;line-height:1.8}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#3d2a00;border:1px solid rgba(180,131,0,.18);box-shadow:0 14px 30px rgba(160,118,0,.18)
    }
    .backtop{background:#fff;border:1px solid var(--line);color:var(--text)}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .home-link{font-weight:800}
    .text-strong{color:#2c3a4b;font-weight:800}
    .img-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .img-row img,.case-media img{width:100%;height:auto;border-radius:18px;border:1px solid #f1e3a7;background:#fff}
    .image-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .figure-card{padding:12px;background:#fffdf7;border:1px solid #f2e4a8;border-radius:18px}
    .figure-card figcaption{margin-top:10px;color:var(--muted);font-size:.9rem;line-height:1.6}
    .chip{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#fff8d8;border:1px solid #efd98d;color:#7a5600;font-size:.8rem;font-weight:700}
    .list-inline{display:flex;flex-wrap:wrap;gap:10px}
    .list-inline span{padding:8px 11px;border-radius:999px;border:1px solid #f0dda0;background:#fffdf4;color:#6d4c00;font-size:.86rem}
    @media (max-width: 1080px){
      .hero-shell,.two-col,.contact-box,.footer-grid,.compare-grid{grid-template-columns:1fr}
      .service-grid,.review-grid,.case-grid,.article-grid,.network-grid,.price-grid,.flow,.intro-grid,.img-row,.image-strip{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .container{width:min(var(--maxw),calc(100% - 22px))}
      .nav-toggle{display:inline-flex}
      .nav{
        display:none;position:absolute;left:16px;right:16px;top:66px;background:#fffdf5;border:1px solid #f0df9f;border-radius:18px;padding:12px;box-shadow:0 18px 44px rgba(153,111,0,.12)
      }
      .nav.open{display:flex;flex-direction:column;align-items:stretch}
      .nav a{width:100%;text-align:center}
      .hero-meta,.service-grid,.review-grid,.case-grid,.article-grid,.network-grid,.price-grid,.flow,.intro-grid,.form-grid,.img-row,.image-strip{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:2.1rem}
      .hero-card,.section-card{padding:20px}
      .floating{right:12px;bottom:12px}
    }