:root{
      --bg:#0d0716;
      --bg2:#150c23;
      --card:rgba(255,255,255,.06);
      --card2:rgba(255,255,255,.09);
      --line:rgba(255,255,255,.12);
      --text:#f4eefc;
      --muted:#d9caea;
      --accent:#ff4fc3;
      --accent2:#8d63ff;
      --accent3:#33d9ff;
      --ok:#76f7c7;
      --warn:#ffd36e;
      --shadow:0 22px 60px rgba(0,0,0,.35);
      --radius:20px;
      --container:1160px;
    }
    *{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(255,79,195,.22), transparent 24%),
        radial-gradient(circle at top right, rgba(51,217,255,.16), transparent 22%),
        radial-gradient(circle at 50% 0%, rgba(141,99,255,.22), transparent 30%),
        linear-gradient(180deg, var(--bg) 0%, #120a1d 52%, #0b0712 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      background:rgba(11,7,18,.72);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:18px;
      padding:14px 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:rgba(255,255,255,.08);padding:6px}
    .brand h2{margin:0;font-size:16px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .nav-links a{font-size:13px;color:var(--muted);padding:8px 11px;border-radius:999px;border:1px solid transparent;transition:.25s}
    .nav-links a:hover,.nav-links a:focus{color:var(--text);border-color:rgba(255,255,255,.16);background:rgba(255,255,255,.05)}
    .menu-btn{display:none;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:0;border-radius:12px;padding:10px 12px;font-weight:700}
    main{padding:22px 0 0}
    section{padding:22px 0}
    .hero{padding-top:16px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:18px;align-items:stretch}
    .hero-copy,.panel,.card,.stat,.review,.faq-item,.form-card,.table-card,.timeline,.note{
      background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.045));
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{padding:28px; position:relative; overflow:hidden}
    .hero-copy:before{
      content:""; position:absolute; inset:-40px auto auto -40px; width:180px; height:180px;
      background:radial-gradient(circle, rgba(255,79,195,.35), transparent 65%);
      filter:blur(4px); pointer-events:none;
    }
    .kicker{display:inline-flex;gap:8px;align-items:center;padding:7px 12px;border-radius:999px;background:rgba(255,79,195,.14);border:1px solid rgba(255,79,195,.24);color:#ffd6f1;font-size:13px}
    h1{margin:14px 0 12px;font-size:clamp(32px,5vw,58px);line-height:1.05;letter-spacing:-.03em}
    .lead{margin:0;color:#f6ecff;font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:13px 18px;font-weight:700;border:1px solid transparent;transition:.25s}
    .btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 12px 28px rgba(255,79,195,.22)}
    .btn-secondary{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.13);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}
    .point{padding:14px;border-radius:16px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08)}
    .point strong{display:block;font-size:14px;margin-bottom:6px}
    .point span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-side{display:grid;gap:12px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:18px}
    .stat .num{font-size:28px;font-weight:800;color:#fff}
    .stat .txt{margin-top:6px;color:var(--muted);font-size:13px;line-height:1.6}
    .panel{padding:18px}
    .panel h3,.section-title h2{margin:0 0 10px;font-size:24px}
    .section-title{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
    .section-title p{margin:0;color:var(--muted);line-height:1.7}
    .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:18px;transition:.25s}
    .card:hover,.review:hover,.faq-item:hover,.stat:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.18)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li,.review p,.faq-item p,.panel p,.table-card p,.note p{color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:#f0e7ff;font-size:13px}
    .timeline{padding:18px}
    .steps{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:flex-start;padding:14px;border-radius:16px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08)}
    .step b{display:inline-flex;width:30px;height:30px;border-radius:10px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent2),var(--accent));color:#fff}
    .step h4{margin:0 0 4px;font-size:15px}
    .step p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .table-card{padding:18px;overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{padding:14px 12px;border-bottom:1px solid rgba(255,255,255,.08);text-align:left;vertical-align:top}
    th{color:#fff;font-size:14px}
    td{color:var(--muted);font-size:14px;line-height:1.7}
    .rating{color:#ffd36e;font-weight:700}
    .faq{display:grid;gap:12px}
    .faq-item summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .faq-body{padding:0 18px 18px}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .review{padding:18px}
    .review .role{color:#ffd7f2;font-size:13px;font-weight:700;margin-bottom:10px}
    .review .stars{color:#ffd36e;letter-spacing:2px;margin-bottom:8px}
    .media-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .media-grid img,.wide-images img{border-radius:18px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04)}
    .wide-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article{padding:16px}
    .article .meta{color:#ffd7f2;font-size:12px;margin-bottom:8px}
    .article h3{margin:0 0 8px;font-size:17px}
    .form-card{padding:18px}
    form{display:grid;gap:12px}
    .field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    label{display:grid;gap:8px;font-size:13px;color:#f3ebff}
    input,select,textarea{
      width:100%;border-radius:14px;border:1px solid rgba(255,255,255,.12);
      background:rgba(5,7,14,.55);color:var(--text);padding:13px 14px;outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(255,79,195,.55);box-shadow:0 0 0 3px rgba(255,79,195,.14)}
    .note{padding:18px}
    .footer{
      margin-top:12px;padding:26px 0 30px;border-top:1px solid rgba(255,255,255,.08);
      background:rgba(7,5,13,.8); color:var(--text)
    }
    .footer a{color:#ffd7f2}
    .footer-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:16px;align-items:start}
    .mini-links{display:flex;flex-wrap:wrap;gap:10px}
    .mini-links a{padding:8px 11px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1)}
    .sticky-tools{position:fixed;right:14px;bottom:14px;display:grid;gap:10px;z-index:60}
    .tool{width:48px;height:48px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 14px 30px rgba(0,0,0,.28)}
    .kefu-box{
      position:fixed;left:14px;bottom:14px;z-index:60;display:grid;gap:10px;
      background:rgba(16,10,25,.88);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:12px;box-shadow:var(--shadow)
    }
    .kefu-box img{width:110px;border-radius:14px}
    .kefu-box small{color:var(--muted);text-align:center}
    .fade-in{opacity:0;transform:translateY(14px);transition:all .6s ease}
    .fade-in.in-view{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.reviews,.article-list,.footer-grid,.grid-2{grid-template-columns:1fr}
      .media-grid,.wide-images{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:66px;flex-direction:column;align-items:flex-start;
        background:rgba(12,8,19,.96);padding:14px;border:1px solid rgba(255,255,255,.1);border-radius:18px;box-shadow:var(--shadow)
      }
      .field-grid,.metric-grid,.hero-points{grid-template-columns:1fr}
      .kefu-box{display:none}
      .mobile-only{display:block}
    }