:root{
      --bg:#fff8f1;
      --panel:#ffffff;
      --panel-2:#fff1e4;
      --text:#1f2937;
      --muted:#5b6472;
      --brand:#ff6a1a;
      --brand-2:#ff8d1f;
      --line:#f1ddd0;
      --shadow:0 18px 50px rgba(255,106,26,.12);
      --shadow-2:0 10px 24px rgba(31,41,55,.08);
      --radius:22px;
      --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(255,138,43,.14), transparent 26%),
        radial-gradient(circle at 85% 12%, rgba(255,106,26,.10), transparent 22%),
        linear-gradient(180deg, #fffaf5 0%, #fff4ea 44%, #fffaf7 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:60;
      backdrop-filter:blur(16px);
      background:rgba(255,248,241,.86);
      border-bottom:1px solid rgba(241,221,208,.9);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;padding:10px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;flex:none}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.2}
    .brand-text span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;font-size:14px;box-shadow:var(--shadow-2)
    }
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#44505f;padding:8px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);transition:.24s ease;
    }
    .nav-links a:hover::after,.nav-links a:focus-visible::after{width:100%}
    .hero{
      padding:30px 0 16px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-card{
      background:
        linear-gradient(135deg, rgba(255,106,26,.98), rgba(255,151,48,.94)),
        radial-gradient(circle at 85% 20%, rgba(255,255,255,.16), transparent 24%);
      color:#fff;border-radius:28px;padding:32px;box-shadow:0 24px 54px rgba(255,106,26,.24);
      position:relative;overflow:hidden;
    }
    .hero-card::before,.hero-card::after{
      content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12);filter:blur(6px)
    }
    .hero-card::before{width:180px;height:180px;right:-50px;top:-40px}
    .hero-card::after{width:240px;height:240px;right:60px;bottom:-150px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.22);padding:8px 12px;border-radius:999px;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,50px);line-height:1.06;letter-spacing:-.02em}
    .hero p{margin:0;color:rgba(255,255,255,.92);font-size:16px;line-height:1.8;max-width:52ch}
    .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;font-size:14px;transition:.22s ease;cursor:pointer;
    }
    .btn-primary{background:#fff;color:#d64f00;box-shadow:0 14px 24px rgba(0,0,0,.12)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
    .btn-outline:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
    .hero-side{
      display:grid;gap:16px;
    }
    .mini-panel{
      background:rgba(255,255,255,.78);border:1px solid rgba(241,221,208,.92);border-radius:24px;padding:18px;box-shadow:var(--shadow-2)
    }
    .mini-panel h2,.section-title{margin:0 0 10px;font-size:22px;line-height:1.2}
    .mini-panel p,.section-sub{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .quick-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}
    .point{
      background:linear-gradient(180deg,#fff,#fff9f4);border:1px solid var(--line);border-radius:18px;padding:14px;
    }
    .point strong{display:block;font-size:18px;color:var(--brand);margin-bottom:4px}
    .point span{font-size:13px;color:var(--muted);line-height:1.5}
    section{padding:22px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head .label{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:700;font-size:13px}
    .section-title{font-size:28px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .card{
      background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:var(--radius);
      padding:18px;box-shadow:var(--shadow-2);transition:.22s ease;
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .metric{font-size:30px;font-weight:800;color:var(--brand);line-height:1}
    .metric-label{margin-top:10px;color:var(--muted);font-size:14px;line-height:1.65}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#4d5968}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start;
    }
    .list{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start;line-height:1.65;color:#39424f}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),#ffb13f);margin-top:7px;flex:none}
    .process{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .step{position:relative;padding:18px 16px 16px}
    .step .num{font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),#ff9f2f);width:36px;height:36px;border-radius:12px;display:grid;place-items:center;margin-bottom:12px}
    .step h3,.card h3{margin:0 0 10px;font-size:18px}
    .step p,.card p,.review p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-2)}
    table{width:100%;border-collapse:collapse;min-width:900px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #f4e5da;font-size:14px;vertical-align:top}
    th{background:#fff6ee;color:#2b3440}
    tr:last-child td{border-bottom:none}
    .score{
      display:inline-flex;align-items:center;gap:6px;background:#fff2e7;color:#d84e00;padding:6px 10px;border-radius:999px;font-weight:700;font-size:13px
    }
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 16px;box-shadow:var(--shadow-2)}
    .faq details + details{margin-top:12px}
    .faq summary{cursor:pointer;font-weight:700;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{margin-top:10px;color:var(--muted);line-height:1.8;font-size:14px}
    .reviews .review{display:flex;flex-direction:column;gap:10px}
    .avatar{
      width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#ffe0c6,#ffb166);
      display:grid;place-items:center;color:#a23d00;font-weight:800;flex:none
    }
    .review-head{display:flex;align-items:center;gap:12px}
    .review strong{display:block;font-size:15px}
    .review small{color:var(--muted)}
    .case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .case{
      background:linear-gradient(180deg,#fff,#fff8f2);border:1px solid var(--line);border-radius:22px;padding:18px
    }
    .case .meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
    .pill{padding:6px 10px;border-radius:999px;background:#fff0e4;color:#c85100;font-size:12px;font-weight:700}
    .article-list{display:grid;gap:12px}
    .article-item{
      display:flex;justify-content:space-between;gap:14px;align-items:center;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:16px
    }
    .article-item span{color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-grid .full{grid-column:1/-1}
    input,select,textarea{
      width:100%;border:1px solid #e7d7c7;background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(255,106,26,.65);box-shadow:0 0 0 4px rgba(255,106,26,.12)}
    textarea{min-height:124px;resize:vertical}
    .footer{
      padding:18px 0 28px;border-top:1px solid rgba(241,221,208,.9);margin-top:18px
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .footer-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:var(--shadow-2)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff6ee;border:1px solid var(--line);font-size:13px}
    .muted{color:var(--muted)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:70;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;border:none;background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;box-shadow:0 16px 30px rgba(255,106,26,.24);display:grid;place-items:center;cursor:pointer
    }
    .backtop{display:none}
    .qrcode img{width:150px;height:150px;object-fit:cover;border-radius:18px;border:1px solid var(--line)}
    .scroll-tip{font-size:12px;color:rgba(255,255,255,.88);margin-top:10px}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.split,.footer-grid,.case-grid,.grid-4,.grid-3,.process{grid-template-columns:1fr 1fr}
      .process{grid-template-columns:repeat(2,minmax(0,1fr))}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:12px
      }
      .nav-links.open{display:flex}
      .hero-grid,.split,.footer-grid,.case-grid,.grid-4,.grid-3,.process,.quick-points,.form-grid{grid-template-columns:1fr}
      .hero-card{padding:24px}
      .hero{padding-top:20px}
      .section-title{font-size:24px}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}