:root{
      --bg:#f7f5ff;
      --bg2:#fffafc;
      --card:#ffffff;
      --text:#1f2340;
      --muted:#5d6480;
      --line:#e7e1f5;
      --brand:#7a3cff;
      --brand2:#a84fff;
      --brand3:#4a7dff;
      --accent:#ff5cb7;
      --shadow:0 18px 50px rgba(88, 56, 160, .12);
      --shadow2:0 10px 24px rgba(65, 50, 120, .10);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 10%, rgba(122,60,255,.12), transparent 25%),
        radial-gradient(circle at 90% 0%, rgba(168,79,255,.14), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:var(--brand);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:saturate(180%) blur(14px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(231,225,245,.7);
    }
    .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}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:5px;box-shadow:var(--shadow2)}
    .brand-title{display:flex;flex-direction:column;min-width:0}
    .brand-title strong{font-size:18px;line-height:1.2}
    .brand-title span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex; flex-wrap:wrap; gap:10px; justify-content:flex-end; align-items:center}
    .nav-links a,.nav-links button{
      border:1px solid transparent;
      background:#fff;
      color:var(--text);
      padding:9px 12px;
      border-radius:999px;
      font-size:14px;
      box-shadow:0 6px 16px rgba(53,46,100,.06);
      transition:.25s ease;
      cursor:pointer;
    }
    .nav-links a:hover,.nav-links button:hover{transform:translateY(-1px);border-color:rgba(122,60,255,.22);box-shadow:0 10px 22px rgba(53,46,100,.10)}
    .nav-links .primary{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff}
    .menu-toggle{display:none}
    .hero{
      position:relative;
      padding:56px 0 26px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.stat,.service-card,.case-card,.review-card,.faq-item,.article-card,.timeline-item,.price-card,.compare-card,.network-card,.method-card,.tag-cloud,.contact-card{
      background:var(--card);
      border:1px solid rgba(231,225,245,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow2);
    }
    .hero-main{
      padding:32px;
      overflow:hidden;
      background:
        linear-gradient(135deg, rgba(122,60,255,.08), rgba(255,255,255,1) 42%),
        linear-gradient(180deg, #fff, #fff);
      position:relative;
    }
    .hero-main:before,.hero-main:after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:radial-gradient(circle, rgba(122,60,255,.18), rgba(122,60,255,0) 70%);
      animation:float 8s ease-in-out infinite;
    }
    .hero-main:before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-main:after{width:140px;height:140px;left:-40px;bottom:-40px;animation-delay:-3s}
    @keyframes float{50%{transform:translateY(-10px) translateX(6px)}}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(122,60,255,.08);color:var(--brand);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:60ch}
    .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:.25s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:0 14px 30px rgba(122,60,255,.22)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .badge{padding:9px 12px;border-radius:999px;background:#fff;color:var(--text);border:1px solid var(--line);font-size:13px}
    .hero-side{padding:22px; display:grid; gap:14px}
    .mini-panel{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fbf8ff,#fff);border:1px solid var(--line)}
    .mini-panel h3{margin:0 0 8px;font-size:16px}
    .mini-panel p{margin:0;color:var(--muted);font-size:14px}
    .mini-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{padding:18px;min-height:106px}
    .stat strong{display:block;font-size:30px;line-height:1;color:var(--brand);margin-bottom:8px}
    .stat span{font-size:14px;color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:14px;margin:0 0 16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:70ch}
    .section-card{padding:24px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card,.method-card,.compare-card,.network-card,.price-card,.contact-card{padding:20px}
    .service-card h3,.method-card h3,.compare-card h3,.network-card h3,.price-card h3,.contact-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.method-card p,.compare-card p,.network-card p,.price-card p,.contact-card p{margin:0;color:var(--muted)}
    .icon{
      width:42px;height:42px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg, rgba(122,60,255,.12), rgba(255,92,183,.12));
      color:var(--brand);font-weight:800;margin-bottom:12px
    }
    .tag-cloud{padding:20px;display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a,.tag-cloud span{padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{padding:18px}
    .timeline-item .step{font-size:13px;font-weight:800;color:var(--brand);margin-bottom:10px}
    .timeline-item h3{margin:0 0 8px;font-size:17px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #efeaf8;text-align:left;vertical-align:top}
    th{background:linear-gradient(180deg,#faf8ff,#f7f2ff);font-size:14px}
    td{color:var(--text);font-size:14px}
    .rating{
      display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px
    }
    .stars{color:#ff9f1c;font-size:20px;letter-spacing:2px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card{padding:20px}
    .review-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:700}
    .review-card p{margin:0;color:var(--muted)}
    .review-meta{margin-top:12px;font-size:13px;color:var(--brand);font-weight:700}
    .case-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .case-card{padding:18px}
    .case-card ul{margin:12px 0 0;padding-left:18px;color:var(--muted)}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card{padding:18px}
    .article-card h3{margin:0 0 8px;font-size:17px}
    .article-card p{margin:0;color:var(--muted)}
    .article-card .meta{margin-top:12px;font-size:13px;color:var(--brand);font-weight:700}
    .contact-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    form{display:grid;gap:12px}
    input,select,textarea{
      width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      font:inherit;outline:none;transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(122,60,255,.5);box-shadow:0 0 0 4px rgba(122,60,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:10px;padding:26px 0 24px;background:#f4f0ff;border-top:1px solid rgba(231,225,245,.9);
      color:var(--text)
    }
    .footer a{color:var(--brand)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:18px}
    .footer small,.footer p{color:var(--muted)}
    .fixed-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .tool{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));
      color:#fff;box-shadow:0 16px 30px rgba(122,60,255,.28);font-weight:800
    }
    .floating-kefu{
      position:fixed;left:16px;bottom:16px;z-index:60;display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:18px;
      background:rgba(255,255,255,.9);border:1px solid var(--line);box-shadow:var(--shadow2)
    }
    .floating-kefu img{width:68px;height:68px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .floating-kefu .txt{font-size:13px;line-height:1.5;color:var(--text)}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;text-align:left;padding:18px 20px;font:inherit;color:var(--text);
      display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer
    }
    .faq-q span{font-weight:700}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}
    .faq-item.open .faq-a{max-height:220px;padding-bottom:18px}
    .faq-a p{margin:0;color:var(--muted)}
    .caret{transition:.25s ease}
    .faq-item.open .caret{transform:rotate(180deg)}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .subtle{color:var(--muted)}
    .inline-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .inline-list span{padding:8px 10px;border-radius:12px;background:#fff;border:1px solid var(--line);font-size:13px}
    .comparison-note{margin-top:12px;color:var(--muted);font-size:14px}
    @media (max-width: 1024px){
      .hero-grid,.contact-layout,.footer-grid,.grid-3,.reviews,.articles,.case-list,.grid-2,.timeline{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .menu-toggle{display:inline-flex}
      .nav{align-items:center}
      .nav-links{
        display:none; width:100%; padding-top:10px; justify-content:flex-start
      }
      .nav.open{flex-wrap:wrap}
      .nav.open .nav-links{display:flex}
      .hero-grid,.contact-layout,.footer-grid,.grid-3,.reviews,.articles,.case-list,.grid-2,.timeline{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .section-head{flex-direction:column;align-items:flex-start}
      .fixed-tools,.floating-kefu{left:12px;right:12px}
      .floating-kefu{justify-content:space-between}
      .floating-kefu img{width:56px;height:56px}
      h1{font-size:clamp(28px,10vw,42px)}
    }