:root{
      --bg:#fff8f4;
      --bg2:#fff1ea;
      --card:#ffffff;
      --card2:#fff7f4;
      --text:#241b1a;
      --muted:#6c5a57;
      --primary:#c41c24;
      --primary2:#ff5b3a;
      --line:rgba(196,28,36,.12);
      --shadow:0 18px 50px rgba(110,30,24,.10);
      --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(255,91,58,.12), transparent 28%),
        radial-gradient(circle at 85% 8%, rgba(196,28,36,.10), transparent 24%),
        linear-gradient(180deg, var(--bg) 0%, #fff 25%, #fff8f5 100%);
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(18px);
      background:rgba(255,248,244,.84);
      border-bottom:1px solid rgba(196,28,36,.08);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .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;padding:4px;box-shadow:0 8px 22px rgba(196,28,36,.12)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .nav-links a{
      padding:9px 12px;border-radius:999px;color:#402c2a;font-size:14px;
      border:1px solid transparent;transition:.2s ease;
    }
    .nav-links a:hover,.nav-links a:focus{background:#fff;border-color:var(--line);box-shadow:0 10px 24px rgba(196,28,36,.08)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 16px;border-radius:999px;border:1px solid transparent;
      font-weight:700;font-size:14px;cursor:pointer;transition:.22s ease;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 30px rgba(196,28,36,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 20px 36px rgba(196,28,36,.28)}
    .btn-ghost{background:#fff;color:var(--primary);border-color:rgba(196,28,36,.18)}
    .btn-ghost:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(196,28,36,.10)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
    .hero{
      position:relative;overflow:hidden;
      padding:34px 0 22px;
    }
    .hero::before,.hero::after{
      content:"";position:absolute;border-radius:50%;pointer-events:none;
      background:radial-gradient(circle, rgba(255,91,58,.16), transparent 70%);
      filter:blur(8px)
    }
    .hero::before{width:280px;height:280px;right:-70px;top:12px}
    .hero::after{width:220px;height:220px;left:-70px;bottom:-40px}
    .hero-grid{
      display:grid;grid-template-columns:1.12fr .88fr;gap:24px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.stat,.feature,.step,.review,.article,.faq-item,.price-card,.contact-card,.compare-card{
      background:rgba(255,255,255,.90);border:1px solid rgba(196,28,36,.10);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-copy{padding:30px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:linear-gradient(135deg,rgba(196,28,36,.12),rgba(255,91,58,.10));color:var(--primary);font-weight:700;font-size:13px
    }
    h1{margin:14px 0 12px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff8f5);border:1px solid rgba(196,28,36,.10)}
    .point strong{display:block;font-size:18px}
    .point span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .hero-panel{padding:24px;background:linear-gradient(180deg,#fffdfc, #fff5f1)}
    .panel-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
    .mini-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#fff;color:var(--primary);font-weight:700;font-size:12px;border:1px solid rgba(196,28,36,.12)}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
    .metric{padding:16px;border-radius:18px;background:#fff;border:1px solid rgba(196,28,36,.10)}
    .metric b{display:block;font-size:24px;color:var(--primary)}
    .metric span{display:block;color:var(--muted);font-size:13px;margin-top:6px}
    .panel-list{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .panel-list li{display:flex;gap:10px;align-items:flex-start;color:#3b2c2a}
    .panel-list svg{flex:none;margin-top:3px}
    section{padding:22px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:720px}
    .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}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .stat,.feature,.step,.review,.article,.faq-item,.price-card,.contact-card,.compare-card{padding:20px}
    .stat h3,.feature h3,.step h3,.review h3,.article h3,.price-card h3{margin:10px 0 8px;font-size:18px}
    .stat p,.feature p,.step p,.review p,.article p,.price-card p{margin:0;color:var(--muted)}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(196,28,36,.14),rgba(255,91,58,.12));color:var(--primary)
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid rgba(196,28,36,.10);color:#4b3734;font-size:13px}
    .steps{counter-reset:step}
    .step{position:relative}
    .step::before{
      counter-increment:step;content:counter(step,decimal-leading-zero);
      position:absolute;right:16px;top:16px;font-weight:800;color:rgba(196,28,36,.16);font-size:22px
    }
    .step .icon{margin-bottom:10px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid rgba(196,28,36,.10);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:16px;border-bottom:1px solid rgba(196,28,36,.08);text-align:left;vertical-align:top}
    th{background:#fff7f4;color:#2c1d1b;font-size:14px}
    td{color:#483533;font-size:14px}
    .rating{color:#c41c24;font-weight:800}
    .compare-card{display:grid;gap:14px}
    .review-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
    .stars{color:#ff9a00;letter-spacing:1px}
    .accordion{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;text-align:left;border:0;background:transparent;color:var(--text);
      padding:18px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:16px;font-weight:700;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;color:var(--muted);padding:0 18px}
    .faq-item.open .faq-a{max-height:180px;padding:0 18px 18px}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .timeline{display:grid;gap:12px}
    .time-item{display:flex;gap:14px;padding:16px;border-radius:18px;background:#fff;border:1px solid rgba(196,28,36,.10)}
    .time-dot{width:12px;height:12px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--primary),var(--primary2));box-shadow:0 0 0 6px rgba(196,28,36,.10)}
    .form{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
    }
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:14px}
    input,select,textarea{
      width:100%;border:1px solid rgba(196,28,36,.14);border-radius:14px;padding:13px 14px;
      font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(196,28,36,.42);box-shadow:0 0 0 4px rgba(196,28,36,.08)}
    textarea{min-height:122px;resize:vertical}
    .footer{
      margin-top:18px;padding:28px 0 36px;background:#1f1212;color:#f7ece9;border-top:1px solid rgba(255,255,255,.08)
    }
    .footer a{color:#ffd6cf}
    .footer .muted{color:rgba(255,255,255,.72)}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr .9fr;gap:18px}
    .footer-card{padding:18px;border-radius:20px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.06)}
    .footer-bottom{margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 32px rgba(196,28,36,.28);border:0;cursor:pointer
    }
    .wechat-pop{
      position:fixed;right:16px;bottom:76px;z-index:59;width:min(280px,calc(100vw - 32px));
      display:none;background:#fff;border-radius:20px;padding:14px;border:1px solid rgba(196,28,36,.12);box-shadow:var(--shadow)
    }
    .wechat-pop.show{display:block}
    .wechat-pop img{border-radius:14px;overflow:hidden;width:100%}
    .mobile-menu{display:none}
    .section-card{padding:22px}
    .article-list{display:grid;gap:14px}
    .article-item{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;padding:16px;border-radius:18px;background:#fff;border:1px solid rgba(196,28,36,.10)}
    .article-item small{color:var(--primary);font-weight:700}
    .split-note{padding:16px;border-radius:18px;background:linear-gradient(135deg,rgba(196,28,36,.10),rgba(255,91,58,.08));border:1px solid rgba(196,28,36,.10);color:#4b312d}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
    .reveal.show{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.two-col,.footer-grid,.grid-4{grid-template-columns:1fr}
      .grid-3,.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
      .nav-links{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .mobile-menu{display:none;padding:0 0 16px}
      .mobile-menu.open{display:block}
      .mobile-menu .nav-links{display:flex;flex-direction:column;align-items:stretch;gap:8px}
      .mobile-menu .nav-links a{background:#fff}
    }
    @media (max-width: 720px){
      .hero-copy,.hero-panel,.section-card,.stat,.feature,.step,.review,.article,.faq-item,.price-card,.contact-card,.compare-card{padding:18px}
      .hero-points,.metric-grid,.grid-3,.grid-2,.form{grid-template-columns:1fr}
      .nav{min-height:68px}
      .brand-text strong{font-size:16px}
      .btn{width:auto}
      .hero-actions{flex-direction:column}
      .hero-actions .btn{width:100%}
      th,td{padding:12px}
    }