:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5f6b85;
      --line:#dce3f2;
      --brand:#6f5cff;
      --brand2:#11c7a3;
      --warm:#ffb84d;
      --shadow:0 18px 50px rgba(29, 41, 84, .10);
      --shadow2:0 10px 24px rgba(111, 92, 255, .14);
      --radius:22px;
      --radius2:16px;
      --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;
      background:
        radial-gradient(circle at 10% 10%, rgba(111,92,255,.10), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(17,199,163,.10), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 60%, #f8fbff 100%);
      color:var(--text);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:60;
      backdrop-filter:blur(16px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(220,227,242,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;
    }
    .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;padding:5px;box-shadow:var(--shadow2)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(111,92,255,.10)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;
      padding:11px 16px;font-weight:700;font-size:14px;
      transition:.22s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#8e7bff);color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px);filter:saturate(1.05)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:14px}
    .menu-btn span,.menu-btn span:before,.menu-btn span:after{content:"";display:block;width:18px;height:2px;background:#25304a;border-radius:2px;position:relative;margin:0 auto}
    .menu-btn span:before{position:absolute;top:-6px}
    .menu-btn span:after{position:absolute;top:6px}
    .hero{
      position:relative;overflow:hidden;
      padding:52px 0 28px;
    }
    .hero::before{
      content:"";position:absolute;inset:-80px -30px auto auto;width:360px;height:360px;border-radius:50%;
      background:radial-gradient(circle, rgba(111,92,255,.18) 0%, rgba(111,92,255,0) 68%);
      pointer-events:none;
    }
    .hero::after{
      content:"";position:absolute;left:-120px;top:10px;width:260px;height:260px;border-radius:50%;
      background:radial-gradient(circle, rgba(17,199,163,.14) 0%, rgba(17,199,163,0) 68%);
      pointer-events:none;
    }
    .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:26px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.faq-item,.review,.price-card,.case-card,.article-card,.about-card,.training-card,.network-card,.help-card,.compare-card,.form-card,.floating-card{
      background:linear-gradient(180deg, rgba(255,255,255,.92), #fff);
      border:1px solid rgba(220,227,242,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{padding:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      color:var(--brand);font-weight:700;font-size:13px;
      background:rgba(111,92,255,.08);border:1px solid rgba(111,92,255,.12);
      border-radius:999px;padding:8px 12px;
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.03em}
    .hero-copy p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 22px}
    .hero-highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
    .mini-stat{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fbfbff,#f6f8ff);border:1px solid var(--line)
    }
    .mini-stat strong{display:block;font-size:22px;color:#1b2450}
    .mini-stat span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.5}
    .hero-panel{padding:22px}
    .panel-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
    .panel-top h2{margin:0;font-size:18px}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:rgba(17,199,163,.10);color:#0a8d76;font-size:12px;font-weight:700}
    .panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .signal{
      padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(111,92,255,.09), rgba(17,199,163,.09));
      border:1px solid rgba(111,92,255,.12)
    }
    .signal b{display:block;font-size:15px;margin-bottom:8px}
    .signal p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .stack-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .tag{
      padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#394561;font-size:12px
    }
    section{padding:18px 0}
    .section-card{padding:28px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .feature,.about-card,.service-card,.training-card,.help-card,.network-card,.case-card,.article-card,.compare-card,.price-card,.review,.form-card{
      padding:20px;border-radius:20px;border:1px solid var(--line);background:#fff;transition:.22s ease
    }
    .feature:hover,.about-card:hover,.service-card:hover,.training-card:hover,.help-card:hover,.network-card:hover,.case-card:hover,.article-card:hover,.compare-card:hover,.price-card:hover,.review:hover,.form-card:hover{transform:translateY(-3px);box-shadow:var(--shadow2)}
    .feature h3,.service-card h3,.training-card h3,.help-card h3,.network-card h3,.case-card h3,.article-card h3,.compare-card h3,.price-card h3,.review h3{margin:10px 0 8px;font-size:18px}
    .feature p,.service-card p,.training-card p,.help-card p,.network-card p,.case-card p,.article-card p,.compare-card p,.price-card p,.review p,.about-card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(111,92,255,.12), rgba(17,199,163,.12));color:#31256f;font-weight:800
    }
    .section-muted{background:linear-gradient(180deg, rgba(111,92,255,.04), rgba(17,199,163,.03));border-top:1px solid rgba(220,227,242,.7);border-bottom:1px solid rgba(220,227,242,.7)}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:14px}
    th{background:#f7f9ff;color:#27324d;font-size:13px}
    tr:last-child td{border-bottom:none}
    .score{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,184,77,.13);color:#8a5200;font-weight:700;font-size:13px
    }
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      position:relative;padding:20px 20px 18px;border-radius:20px;background:#fff;border:1px solid var(--line)
    }
    .step::before{
      content:attr(data-step);display:inline-grid;place-items:center;width:34px;height:34px;border-radius:12px;
      background:linear-gradient(135deg,var(--brand),#8e7bff);color:#fff;font-weight:800;font-size:13px;margin-bottom:10px
    }
    .step h3{margin:0 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .pill-list{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:10px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#34405f}
    .review-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .stars{color:#ffad2e;letter-spacing:1px}
    .article-card .meta,.case-card .meta{margin-top:12px;font-size:12px;color:#73809a}
    .banner-strip{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .banner-strip img{width:100%;border-radius:18px;border:1px solid var(--line);object-fit:cover}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    label{display:block;font-size:13px;color:#394561;margin-bottom:8px;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fbfcff;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(111,92,255,.45);box-shadow:0 0 0 4px rgba(111,92,255,.08);background:#fff}
    textarea{min-height:120px;resize:vertical}
    .submit-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:14px}
    .helper{color:var(--muted);font-size:13px;line-height:1.6}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:#fff;border:none;cursor:pointer;color:var(--text);
      display:flex;align-items:center;justify-content:space-between;gap:18px;font:inherit;text-align:left
    }
    .faq-q span{font-weight:700}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;background:#fbfcff;border-top:1px solid transparent}
    .faq-a p{margin:0;padding:0 20px 18px;color:var(--muted);line-height:1.8;font-size:14px}
    .faq-item.open .faq-a{max-height:180px;border-top-color:var(--line)}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease;color:#54607c}
    .footer{
      margin-top:10px;
      background:#11182d;color:#dfe7ff;border-top:1px solid rgba(255,255,255,.08);
    }
    .footer a{color:#ffffff}
    .footer .container{padding-top:30px;padding-bottom:24px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer h3,.footer h4{margin:0 0 12px}
    .footer p,.footer li,.footer span{color:#c8d3f1;line-height:1.8;font-size:14px}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .footer-bottom{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:70;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;
      display:grid;place-items:center;box-shadow:var(--shadow);cursor:pointer
    }
    .floating .kefu{background:linear-gradient(135deg,var(--brand),#8e7bff);color:#fff;border:none}
    .mobile-panel{display:none}
    .note{
      display:inline-flex;align-items:center;gap:8px;font-size:12px;color:#4b5878;
      padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)
    }
    .link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .link-list a{padding:10px 12px;border:1px solid var(--line);border-radius:14px;background:#fff;color:#34405f;font-size:13px}
    .scroll-target{scroll-margin-top:90px}
    .marquee{
      display:flex;flex-wrap:wrap;gap:10px;margin-top:14px
    }
    .marquee .pill{background:linear-gradient(135deg,#fff, #f7f9ff)}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.timeline,.footer-grid,.banner-strip{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .mobile-panel{
        display:none;padding:0 0 16px
      }
      .mobile-panel.open{display:block}
      .mobile-panel .nav-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;padding:0 0 14px}
      .mobile-panel .nav-links a{background:#fff;border:1px solid var(--line);text-align:center}
      .nav{flex-wrap:wrap;padding:12px 0}
      .nav-cta{margin-left:auto}
      .hero-copy{padding:24px}
      .section-card{padding:22px}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .hero{padding-top:28px}
      h1{font-size:30px}
      .hero-highlights{grid-template-columns:1fr}
      .panel-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero-actions{display:grid;grid-template-columns:1fr;justify-items:stretch}
      .btn{width:100%}
      .link-list{grid-template-columns:1fr}
      .footer-bottom{flex-direction:column}
    }
    .reveal{opacity:0;transform:translateY(12px);transition:.45s ease}
    .reveal.show{opacity:1;transform:none}