:root{
      --bg:#f6f3ff;
      --bg2:#fcfbff;
      --card:#ffffff;
      --line:#e8e0ff;
      --text:#1f2440;
      --muted:#5b607b;
      --brand:#7c3aed;
      --brand2:#a855f7;
      --brand3:#6d28d9;
      --accent:#ff4fd8;
      --shadow:0 18px 50px rgba(88,28,135,.10);
      --radius:22px;
      --container:1160px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(168,85,247,.12), transparent 30%),
        radial-gradient(circle at top right, rgba(255,79,216,.10), transparent 28%),
        linear-gradient(180deg,#faf7ff 0%, #f6f3ff 38%, #fbfaff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);padding:0 20px;margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:blur(14px);
      background:rgba(250,247,255,.82);
      border-bottom:1px solid rgba(232,224,255,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:6px;box-shadow:0 8px 20px rgba(124,58,237,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;letter-spacing:.5px}
    .brand-text span{display:block;font-size:.82rem;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      font-size:.92rem;color:var(--text);
      padding:10px 12px;border-radius:999px;border:1px solid transparent;
      transition:.22s ease;
    }
    .nav-links a:hover,.nav-links a:focus{background:#fff;border-color:var(--line);box-shadow:0 10px 24px rgba(124,58,237,.08);transform:translateY(-1px)}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 12px;font-size:.95rem;
    }
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch
    }
    .hero-main,.hero-side,.section-card,.faq-item,.review-card,.case-card,.article-card,.metric,.compare-card,.form-card,.price-card,.timeline-card,.network-card,.help-card{
      background:rgba(255,255,255,.92);border:1px solid rgba(232,224,255,.9);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;filter:blur(6px);pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;background:rgba(168,85,247,.16);top:-70px;right:-50px}
    .hero-main:after{width:160px;height:160px;background:rgba(255,79,216,.12);bottom:-55px;right:26%}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(90deg,rgba(124,58,237,.12),rgba(255,79,216,.10));color:var(--brand3);font-size:.88rem;font-weight:700}
    h1{font-size:clamp(2rem,5vw,3.8rem);line-height:1.05;margin:16px 0 14px;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);line-height:1.8;font-size:1.03rem;max-width:64ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;transition:.22s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:0 14px 30px rgba(124,58,237,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(124,58,237,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);box-shadow:0 14px 26px rgba(124,58,237,.10)}
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:24px}
    .metric{padding:18px}
    .metric strong{display:block;font-size:1.5rem}
    .metric span{display:block;color:var(--muted);font-size:.92rem;margin-top:6px;line-height:1.6}
    .hero-side{padding:24px;display:grid;gap:14px;align-content:start}
    .side-tag{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 11px;background:#f7f1ff;color:#5b239f;border:1px solid #eadcff;border-radius:999px;font-size:.85rem}
    .quick-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .quick-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.6}
    .quick-list li:before{content:"";width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));margin-top:7px;flex:0 0 auto}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:1.7rem}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .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}
    .section-card,.case-card,.article-card,.review-card,.help-card,.price-card,.timeline-card,.network-card,.compare-card,.form-card{padding:22px}
    .section-card h3,.case-card h3,.article-card h3,.review-card h3,.price-card h3,.timeline-card h3,.network-card h3,.help-card h3{margin:0 0 10px;font-size:1.08rem}
    .section-card p,.case-card p,.article-card p,.review-card p,.help-card p,.timeline-card p,.network-card p,.price-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon-badge{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(124,58,237,.12),rgba(255,79,216,.14));color:var(--brand3);
      margin-bottom:14px;font-weight:800
    }
    .flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .flow .step{padding:20px;background:#fff;border:1px solid var(--line);border-radius:20px;position:relative}
    .flow .step:after{content:"";position:absolute;top:18px;right:18px;width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent))}
    .step-num{font-weight:800;color:var(--brand3);margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid #eee;text-align:left;vertical-align:top}
    th{background:#faf7ff;color:#2a2f4d;font-size:.95rem}
    td{color:var(--text);line-height:1.65}
    .score{font-weight:800;color:var(--brand3)}
    .compare-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#f5edff;color:#6428c6;border:1px solid #e7d7ff;font-weight:700;font-size:.85rem}
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border:1px solid var(--line);background:#fff;border-radius:999px;color:var(--text);font-size:.88rem;box-shadow:0 8px 18px rgba(124,58,237,.06)}
    .reviews,.cases,.articles,.faq-list,.help-grid,.network-grid,.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-card .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:1px}
    .avatar{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(124,58,237,.2),rgba(255,79,216,.16));display:grid;place-items:center;font-weight:800;color:var(--brand3)}
    .case-card .labels,.article-card .labels{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .label{font-size:.82rem;padding:7px 10px;border-radius:999px;background:#f6f0ff;color:#5d27ac}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;
      font-size:1rem;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .faq-toggle{font-size:1.1rem;color:var(--brand3)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px 0;border-bottom:1px dashed #eadcff}
    .timeline-item:last-child{border-bottom:0;padding-bottom:0}
    .timeline-item strong{color:var(--brand3)}
    .form-card form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:.92rem;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid #ddd6fe;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:var(--brand);box-shadow:0 0 0 4px rgba(124,58,237,.12)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .note{color:var(--muted);font-size:.9rem;line-height:1.6}
    .footer{
      margin-top:20px;padding:28px 0 34px;background:linear-gradient(180deg,#f8f4ff,#f4eeff);
      border-top:1px solid rgba(232,224,255,.9)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
    .footer a{color:#3f1d7a}
    .footer small,.footer p{color:#5b607b}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:9px 11px;border:1px solid #e6dcff;background:#fff;border-radius:999px}
    .sticky-actions{
      position:fixed;right:16px;bottom:16px;z-index:70;display:grid;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;border:0;background:linear-gradient(135deg,var(--brand),var(--accent));
      color:#fff;box-shadow:0 16px 26px rgba(124,58,237,.24);display:grid;place-items:center;font-size:1.1rem;cursor:pointer
    }
    .customer-float{
      position:fixed;left:16px;bottom:16px;z-index:70;max-width:220px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden
    }
    .customer-float header{padding:12px 14px;background:linear-gradient(135deg,rgba(124,58,237,.12),rgba(255,79,216,.10));font-weight:800}
    .customer-float .body{padding:12px 14px;display:grid;gap:10px}
    .customer-float img{border-radius:12px}
    .scroll-animate{opacity:0;transform:translateY(18px);transition:all .6s ease}
    .scroll-animate.visible{opacity:1;transform:none}
    .home-link{font-weight:800;color:var(--brand3)}
    .mini-legend{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .mini-legend span{font-size:.85rem;color:#5b607b}
    .service-network-list{display:grid;gap:10px}
    .service-network-list div{padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff}
    .cards-inline{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .case-image{
      width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px;border:1px solid var(--line);margin-bottom:14px
    }
    .media-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .media-strip img{border-radius:18px;border:1px solid var(--line)}
    @media (max-width: 1024px){
      .hero-grid,.grid-3,.reviews,.cases,.articles,.faq-list,.help-grid,.network-grid,.price-grid,.footer-grid,.grid-2,.cards-inline{grid-template-columns:1fr 1fr}
      .flow{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 768px){
      .menu-btn{display:inline-flex}
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:74px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:12px 14px}
      .hero-grid,.grid-3,.reviews,.cases,.articles,.faq-list,.help-grid,.network-grid,.price-grid,.footer-grid,.grid-2,.flow,.form-card form,.timeline-item,.cards-inline,.media-strip{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      h1{font-size:2.2rem}
      .hero-main,.hero-side,.section-card,.faq-item,.review-card,.case-card,.article-card,.compare-card,.form-card,.price-card,.timeline-card,.network-card,.help-card{padding:18px}
      .customer-float{display:none}
      .sticky-actions{right:12px;bottom:12px}
    }