:root{
      --bg:#f7f4ff;
      --bg2:#ffffff;
      --card:#ffffff;
      --line:#e7defe;
      --text:#1d2433;
      --muted:#5d6780;
      --primary:#7a38ff;
      --primary2:#b04cff;
      --accent:#20c7b6;
      --shadow:0 16px 40px rgba(89, 53, 193, .10);
      --shadow2:0 10px 24px rgba(45, 24, 120, .12);
      --radius:18px;
      --radius2:24px;
      --max: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 top left, rgba(122,56,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(32,199,182,.10), transparent 24%),
        linear-gradient(180deg, #fbf9ff 0%, #f5f2ff 48%, #f8fbff 100%);
      overflow-x:hidden;
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky; top:0; z-index:40;
      backdrop-filter:saturate(160%) blur(14px);
      background:rgba(255,255,255,.72);
      border-bottom:1px solid rgba(122,56,255,.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}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 6px 18px rgba(122,56,255,.12)}
    .brand-text{display:flex; flex-direction:column; min-width:0}
    .brand-text strong{font-size:18px; letter-spacing:.5px}
    .brand-text span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex; flex-wrap:wrap; gap:6px; align-items:center; justify-content:flex-end}
    .nav-links a{
      padding:9px 11px; border-radius:999px; color:#334; font-size:14px;
      transition:.25s ease; border:1px solid transparent;
    }
    .nav-links a:hover{background:#fff;border-color:var(--line);box-shadow:0 6px 18px rgba(122,56,255,.08);transform:translateY(-1px)}
    .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:14px; border:1px solid transparent;
      font-weight:700; cursor:pointer; transition:.25s ease; white-space:nowrap;
    }
    .btn-primary{
      color:#fff; background:linear-gradient(135deg, var(--primary), var(--primary2));
      box-shadow:0 14px 28px rgba(122,56,255,.22);
    }
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 18px 34px rgba(122,56,255,.26)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .menu-btn{display:none}
    .hero{
      position:relative;
      padding:46px 0 26px;
      overflow:hidden;
    }
    .hero::before{
      content:""; position:absolute; inset:0;
      background:
        linear-gradient(120deg, rgba(122,56,255,.12), rgba(255,255,255,0) 40%),
        linear-gradient(260deg, rgba(32,199,182,.08), rgba(255,255,255,0) 38%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;
      display:grid; grid-template-columns:1.15fr .85fr; gap:26px; align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.faq-item,.review-card,.article-card,.case-card,.metric,.service-card,.step,.compare-box,.form-card,.support-card,.price-card,.network-card,.tag-cloud,.timeline,.contact-card,.help-card{
      background:rgba(255,255,255,.9); border:1px solid rgba(122,56,255,.09);
      box-shadow:var(--shadow); border-radius:var(--radius2);
    }
    .hero-copy{padding:30px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 12px; border-radius:999px;
      background:rgba(122,56,255,.10); color:var(--primary); font-weight:700; font-size:13px;
    }
    h1{font-size:clamp(32px, 5vw, 58px); line-height:1.06; margin:16px 0 14px}
    .lead{font-size:17px; line-height:1.8; color:var(--muted); margin:0 0 22px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 18px}
    .hero-points{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; margin-top:18px}
    .point{
      padding:14px; border-radius:16px; background:linear-gradient(180deg, #fff, #fbf8ff);
      border:1px solid var(--line); min-height:84px;
    }
    .point b{display:block; margin-bottom:6px}
    .point span{color:var(--muted); font-size:14px; line-height:1.6}
    .hero-panel{padding:24px; display:grid; gap:14px}
    .panel-top{display:flex; justify-content:space-between; gap:12px; align-items:flex-start}
    .panel-top h2{margin:0; font-size:22px}
    .panel-top p{margin:6px 0 0; color:var(--muted); line-height:1.7}
    .pill-row{display:flex; flex-wrap:wrap; gap:8px}
    .pill{padding:8px 10px; background:#f5efff; color:#5631a8; border-radius:999px; font-size:13px; border:1px solid #eadfff}
    .stat-grid{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px; margin:18px 0 0}
    .metric{padding:18px}
    .metric strong{display:block; font-size:28px; color:var(--primary); line-height:1}
    .metric span{display:block; margin-top:8px; color:var(--muted); font-size:13px; line-height:1.5}
    section{padding:22px 0}
    .section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:700px; line-height:1.7}
    .section-card{padding:22px}
    .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}
    .service-card,.case-card,.review-card,.article-card,.support-card,.price-card,.network-card,.help-card,.compare-box,.contact-card,.form-card{padding:18px}
    .service-card h3,.case-card h3,.review-card h3,.article-card h3,.support-card h3,.price-card h3,.network-card h3,.help-card h3,.compare-box h3,.contact-card h3{margin:0 0 10px; font-size:18px}
    .service-card p,.case-card p,.review-card p,.article-card p,.support-card p,.price-card p,.network-card p,.help-card p,.compare-box p,.contact-card p{margin:0; color:var(--muted); line-height:1.72}
    .service-card ul,.help-card ul,.network-card ul,.support-card ul{margin:12px 0 0; padding-left:18px; color:#3f4a64}
    .service-card li,.help-card li,.network-card li,.support-card li{margin:7px 0}
    .icon{
      width:42px;height:42px;border-radius:12px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(122,56,255,.14), rgba(176,76,255,.15));
      color:var(--primary); font-weight:900; margin-bottom:12px;
    }
    .flow{display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:14px}
    .step{padding:18px; position:relative}
    .step .num{display:inline-flex; width:34px; height:34px; border-radius:999px; align-items:center; justify-content:center; background:var(--primary); color:#fff; font-weight:800; margin-bottom:12px}
    .step h3{margin:0 0 8px; font-size:17px}
    .step p{margin:0; color:var(--muted); line-height:1.7}
    .table-wrap{overflow-x:auto; border-radius:18px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:900px}
    th,td{padding:15px 14px; text-align:left; border-bottom:1px solid #f0e9ff; vertical-align:top}
    th{background:#f6f1ff; color:#432f7f}
    tr:hover td{background:#fcfaff}
    .badge{display:inline-flex; align-items:center; gap:6px; padding:6px 10px; border-radius:999px; background:#f4efff; color:#5a31b8; font-size:13px}
    .compare-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:16px}
    .score{
      display:grid; gap:12px; padding:22px; border-radius:24px;
      background:linear-gradient(135deg, rgba(122,56,255,.95), rgba(176,76,255,.94));
      color:#fff; box-shadow:0 18px 40px rgba(122,56,255,.25);
    }
    .score h3,.score p{color:#fff}
    .score .big{font-size:42px; font-weight:900; line-height:1}
    .stars{letter-spacing:4px; font-size:20px}
    .compare-matrix{display:grid; gap:12px}
    .compare-row{display:grid; grid-template-columns:1fr auto; gap:12px; align-items:center; padding:14px 16px; border-radius:16px; background:#fff; border:1px solid var(--line)}
    .compare-row strong{display:block}
    .compare-row span{color:var(--muted); font-size:14px}
    .tag-cloud{padding:18px; display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud a{padding:9px 12px; border-radius:999px; background:#f7f3ff; border:1px solid #eadfff; color:#4e2fa0}
    .faq-list{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; background:transparent; border:none; color:var(--text); text-align:left;
      padding:18px; font-size:16px; font-weight:700; display:flex; justify-content:space-between; gap:12px; cursor:pointer
    }
    .faq-a{padding:0 18px 18px; color:var(--muted); line-height:1.75; display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q{color:var(--primary)}
    .review-grid,.article-grid,.case-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .review-meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .review-meta strong{font-size:16px}
    .review-meta span{color:var(--primary); font-weight:800}
    .muted{color:var(--muted)}
    .articles-list{display:grid; gap:10px}
    .article-card small{color:var(--primary); font-weight:700}
    .article-card a{display:inline-flex; margin-top:10px; font-weight:700}
    .form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    label{display:block; font-size:14px; font-weight:700; margin-bottom:8px}
    input,select,textarea{
      width:100%; border:1px solid #dbcfff; background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none;
      transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:var(--primary); box-shadow:0 0 0 4px rgba(122,56,255,.12)}
    textarea{min-height:126px; resize:vertical}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-top:14px}
    .help-grid{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
    .network-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .timeline{padding:18px}
    .timeline ul{list-style:none; padding:0; margin:0; display:grid; gap:12px}
    .timeline li{display:flex; gap:12px; align-items:flex-start}
    .timeline .dot{width:12px;height:12px;border-radius:999px;background:var(--accent);margin-top:7px;box-shadow:0 0 0 5px rgba(32,199,182,.12)}
    .footer-top{
      margin-top:20px; padding:24px 0 18px; border-top:1px solid rgba(122,56,255,.10)
    }
    footer{
      background:#171d2a; color:#e8ecf7; margin-top:18px;
    }
    footer a{color:#c9bcff}
    .footer-inner{padding:28px 0}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px}
    .footer-brand .ai-page-logo{width:46px;height:46px;margin-bottom:10px}
    .copyright{padding-top:16px; margin-top:16px; border-top:1px solid rgba(255,255,255,.10); color:#bfc6da; font-size:13px; line-height:1.7}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:50; display:grid; gap:10px
    }
    .float-btn{
      width:54px; height:54px; border-radius:18px; display:grid; place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--primary2)); color:#fff;
      box-shadow:0 16px 28px rgba(122,56,255,.24); border:none; cursor:pointer;
    }
    .float-btn.secondary{background:#fff;color:var(--primary); border:1px solid var(--line)}
    .floating .tip{
      position:absolute; right:66px; bottom:18px; background:#fff; border:1px solid var(--line);
      padding:10px 12px; border-radius:12px; box-shadow:var(--shadow2); color:var(--text); white-space:nowrap
    }
    .gallery{
      display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px
    }
    .gallery .imgbox{
      border-radius:18px; overflow:hidden; background:#fff; border:1px solid var(--line); box-shadow:var(--shadow)
    }
    .gallery img{width:100%; height:auto}
    .split{
      display:grid; grid-template-columns:1fr 1fr; gap:16px; align-items:start
    }
    .list-check{list-style:none; padding:0; margin:0; display:grid; gap:10px}
    .list-check li{display:flex; gap:10px; align-items:flex-start}
    .list-check i{font-style:normal; width:22px; height:22px; border-radius:50%; background:rgba(32,199,182,.12); color:#0f9c90; display:grid; place-items:center; margin-top:2px; flex:none}
    .mobile-only{display:none}
    .hidden{display:none}
    .kefu{
      display:grid; grid-template-columns:120px 1fr; gap:14px; align-items:center
    }
    .kefu img{width:120px; border-radius:16px; border:1px solid var(--line); background:#fff}
    .small-note{font-size:12px;color:var(--muted);line-height:1.7}
    @media (max-width: 1024px){
      .hero-grid,.compare-grid,.split,.footer-grid,.help-grid,.network-grid,.review-grid,.article-grid,.case-grid,.gallery,.grid-4,.grid-3,.flow{grid-template-columns:repeat(2,minmax(0,1fr))}
      .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex; position:absolute; left:16px; right:16px; top:74px; padding:12px; flex-direction:column;
        background:rgba(255,255,255,.98); border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow2)
      }
      .nav{position:relative}
    }
    @media (max-width: 720px){
      .container{width:min(var(--max), calc(100% - 20px))}
      .hero-copy,.hero-panel,.section-card,.form-card,.score{padding:18px}
      .hero-grid,.compare-grid,.split,.footer-grid,.help-grid,.network-grid,.review-grid,.article-grid,.case-grid,.gallery,.grid-4,.grid-3,.flow{grid-template-columns:1fr}
      .hero-points,.form-grid{grid-template-columns:1fr}
      .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      h1{font-size:34px}
      .section-head{flex-direction:column; align-items:flex-start}
      .mobile-only{display:block}
      .kefu{grid-template-columns:1fr}
      .floating .tip{display:none}
    }
    .reveal{opacity:0; transform:translateY(16px); transition:all .6s ease}
    .reveal.show{opacity:1; transform:none}