:root{
      --bg:#f7f4ef;
      --bg2:#fffaf5;
      --card:#ffffff;
      --text:#132033;
      --muted:#5d6b7d;
      --line:rgba(19,32,51,.10);
      --brand:#ee4f7a;
      --brand2:#ff7d45;
      --brand3:#6a7cff;
      --shadow:0 18px 40px rgba(25, 36, 60, .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(238,79,122,.10), transparent 28%),
        radial-gradient(circle at right top, rgba(106,124,255,.10), transparent 22%),
        linear-gradient(180deg, var(--bg2), var(--bg));
    }
    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:50;
      backdrop-filter:blur(16px);
      background:rgba(247,244,239,.82);
      border-bottom:1px solid rgba(19,32,51,.08);
    }
    .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}
    .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.08)}
    .brand h1,.brand .site-name{margin:0;font-size:18px;line-height:1.2;font-weight:800;white-space:nowrap}
    .brand small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .menu-btn,.ghost-btn,.primary-btn,.secondary-btn,.top-btn{
      border:0;border-radius:999px;cursor:pointer;font-weight:700;
      transition:.25s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;
    }
    .menu-btn{display:none;background:#fff;color:var(--text);box-shadow:0 8px 20px rgba(0,0,0,.08);padding:10px 14px}
    .ghost-btn,.secondary-btn{background:#fff;color:var(--text);padding:11px 16px;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .primary-btn{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;padding:12px 18px;box-shadow:0 14px 26px rgba(238,79,122,.26)}
    .primary-btn:hover,.ghost-btn:hover,.secondary-btn:hover,.top-btn:hover,.menu-btn:hover{transform:translateY(-2px)}
    .topnav{
      display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end;
    }
    .topnav a{
      padding:9px 12px;border-radius:999px;color:var(--muted);font-size:14px;
    }
    .topnav a:hover,.topnav a.active{background:rgba(238,79,122,.10);color:var(--text)}
    .hero{padding:28px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.metric,.review,.faq-item,.article,.quote,.table-wrap,.form-card,.timeline,.price-card,.network,.tag-cloud,.compare-card{
      background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;background:rgba(106,124,255,.10);border-radius:999px;color:#31417b;font-size:13px;font-weight:700}
    .hero h2{margin:16px 0 12px;font-size:clamp(32px,5vw,56px);line-height:1.08;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
    .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}
    .mini{
      padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff, #fff7f2);border:1px solid rgba(238,79,122,.12)
    }
    .mini strong{display:block;font-size:18px;margin-bottom:4px}
    .mini span{color:var(--muted);font-size:13px}
    .hero-side{padding:22px;display:grid;gap:14px}
    .hero-side .statline{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:18px;background:linear-gradient(180deg,#fff,#fff8fb)}
    .metric strong{display:block;font-size:24px}
    .metric span{color:var(--muted);font-size:13px}
    section{padding:20px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h3{margin:0;font-size:28px}
    .section-title p{margin:0;color:var(--muted);max-width:700px;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card,.panel,.article,.review,.faq-item,.compare-card,.timeline,.price-card,.network,.tag-cloud,.form-card{padding:22px}
    .card h4,.panel h4,.review h4,.article h4,.compare-card h4,.price-card h4{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p,.article p,.compare-card p,.price-card p,.timeline li,.network p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(238,79,122,.12),rgba(106,124,255,.12));margin-bottom:14px;font-size:20px
    }
    .pill-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .pill{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid rgba(19,32,51,.08);font-size:13px;color:#3a475b}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{
      position:relative;padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line)
    }
    .step::after{
      content:"";position:absolute;right:-10px;top:50%;width:16px;height:16px;border-top:2px solid rgba(238,79,122,.35);border-right:2px solid rgba(238,79,122,.35);transform:translateY(-50%) rotate(45deg)
    }
    .step:last-child::after{display:none}
    .step strong{display:block;font-size:18px;margin-bottom:8px}
    .compare-table{
      width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border-radius:18px;border:1px solid var(--line);background:#fff
    }
    .compare-table th,.compare-table td{padding:14px 14px;border-bottom:1px solid rgba(19,32,51,.08);text-align:left;vertical-align:top}
    .compare-table th{background:#f8f8ff;color:#1c2b4a;font-size:14px}
    .compare-table tr:last-child td{border-bottom:0}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:rgba(238,79,122,.12);color:#b82255;font-size:12px;font-weight:700}
    .table-scroll{overflow:auto;border-radius:18px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:#fff;border:0;text-align:left;font-size:16px;font-weight:700;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);line-height:1.75;display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .reviews .review{display:flex;flex-direction:column;gap:12px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
    .stars{color:#ff9a1f;letter-spacing:2px}
    .articles .article a{display:inline-flex;margin-top:12px;color:#b82255;font-weight:700}
    .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}
    input,select,textarea{
      width:100%;border:1px solid rgba(19,32,51,.12);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(238,79,122,.45);box-shadow:0 0 0 4px rgba(238,79,122,.08)}
    .submit-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:6px}
    .footer{
      margin-top:12px;padding:24px 0 30px;border-top:1px solid rgba(19,32,51,.08);color:#2a3648
    }
    .footer .grid-3{align-items:start}
    .footer a{color:#1f3f8f}
    .footer small{color:var(--muted)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border-radius:16px;border:0;cursor:pointer;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand3),var(--brand));color:#fff;box-shadow:0 12px 26px rgba(69,84,190,.28)
    }
    .floating .kefu{
      position:relative
    }
    .kefu-pop{
      position:absolute;right:62px;bottom:0;width:220px;padding:12px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);display:none
    }
    .kefu-pop img{border-radius:14px}
    .show{display:block}
    .scroll-anim{opacity:0;transform:translateY(18px);transition:.7s ease}
    .scroll-anim.in{opacity:1;transform:none}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud .tags a,.network .tags a{
      padding:10px 12px;border-radius:999px;background:#fff;border:1px solid rgba(19,32,51,.09);font-size:13px;color:#3d4a5c
    }
    .timeline ul{margin:0;padding-left:18px;display:grid;gap:12px}
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .note{font-size:12px;color:var(--muted);line-height:1.7}
    .split{
      display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start
    }
    .image-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .image-strip img,.case-img{width:100%;border-radius:18px;aspect-ratio:16/10;object-fit:cover;border:1px solid rgba(19,32,51,.08)}
    .form-card{display:grid;gap:16px}
    .center{display:flex;align-items:center;justify-content:center}
    @media (max-width: 1024px){
      .hero-grid,.split,.grid-4,.workflow,.price-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-points{grid-template-columns:repeat(2,minmax(0,1fr))}
      .section-title{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 760px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .menu-btn{display:inline-flex}
      .topnav{
        position:absolute;left:16px;right:16px;top:72px;display:none;flex-direction:column;align-items:stretch;
        background:#fff;border:1px solid var(--line);border-radius:20px;padding:10px;box-shadow:var(--shadow)
      }
      .topnav.show{display:flex}
      .topnav a{padding:12px 14px}
      .hero-grid,.grid-2,.grid-3,.grid-4,.workflow,.price-grid,.split,.hero-points,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .hero h2{font-size:31px}
      .step::after{display:none}
      .floating{right:12px;bottom:12px}
      .kefu-pop{width:190px}
      .nav{position:relative}
    }