:root{
      --bg:#f6f4ef;
      --panel:#fffdf8;
      --panel-2:#f4efe8;
      --text:#1f2937;
      --muted:#5f6773;
      --line:rgba(31,41,55,.10);
      --brand:#6d28d9;
      --brand-2:#ff4d6d;
      --accent:#ffb703;
      --good:#0f766e;
      --shadow:0 18px 50px rgba(15,23,42,.10);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,109,.10), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(109,40,217,.12), transparent 24%),
        linear-gradient(180deg,#fcfbf8 0%, var(--bg) 100%);
      line-height:1.65;
    }
    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}
    .glass{
      background:rgba(255,255,255,.72);
      backdrop-filter:blur(12px);
      border:1px solid rgba(255,255,255,.5);
      box-shadow:var(--shadow);
    }
    header{
      position:sticky;top:0;z-index:50;
      background:rgba(246,244,239,.82);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(31,41,55,.08);
    }
    .topbar{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:12px 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;border:1px solid var(--line)}
    .brand h2{margin:0;font-size:16px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-wrap{display:flex;align-items:center;gap:12px}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 12px;font-weight:700
    }
    nav ul{list-style:none;display:flex;gap:18px;margin:0;padding:0;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:#374151;font-weight:600;padding:8px 0;position:relative}
    nav a::after{
      content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2px;
      transform:scaleX(0);transform-origin:left;background:linear-gradient(90deg,var(--brand),var(--brand-2));
      transition:transform .25s ease;
    }
    nav a:hover::after{transform:scaleX(1)}
    .cta-btn, .ghost-btn, .primary-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:999px;padding:12px 18px;font-weight:700;border:1px solid transparent;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      cursor:pointer;
    }
    .cta-btn,.primary-btn{
      background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 26px rgba(109,40,217,.22)
    }
    .ghost-btn{background:#fff;border-color:var(--line);color:var(--text)}
    .cta-btn:hover,.primary-btn:hover,.ghost-btn:hover,.card:hover,.review-card:hover,.feature:hover,.case:hover,.article:hover{transform:translateY(-2px)}
    main{padding-bottom:18px}
    section{padding:28px 0}
    .hero{
      padding:28px 0 18px;
      position:relative;overflow:hidden;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-copy{
      padding:30px;border-radius:28px;background:
        linear-gradient(135deg, rgba(255,255,255,.90), rgba(255,247,249,.84));
      border:1px solid rgba(255,255,255,.72);
      box-shadow:var(--shadow);position:relative;overflow:hidden;
    }
    .hero-copy::before,.hero-copy::after{
      content:"";position:absolute;border-radius:999px;filter:blur(20px);opacity:.8;pointer-events:none
    }
    .hero-copy::before{width:180px;height:180px;background:rgba(255,77,109,.16);right:-30px;top:-20px}
    .hero-copy::after{width:220px;height:220px;background:rgba(109,40,217,.15);left:-60px;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(109,40,217,.08);color:#5b21b6;font-size:13px;font-weight:700}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.06;margin:18px 0 14px;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .point{
      background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:18px;padding:14px 14px 12px
    }
    .point b{display:block;font-size:18px;margin-bottom:4px}
    .point span{color:var(--muted);font-size:13px}
    .hero-side{
      display:grid;gap:14px;
    }
    .side-card,.card,.feature,.case,.review-card,.article,.faq-item,.form-card,.compare-card,.timeline-card,.network-card{
      border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);box-shadow:0 10px 28px rgba(15,23,42,.06)
    }
    .side-card{padding:22px}
    .side-card h3,.section-title{margin:0 0 10px;font-size:24px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head p{margin:0;color:var(--muted);max-width:64ch}
    .metric-grid,.feature-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.timeline-grid{
      display:grid;grid-template-columns:repeat(3,1fr);gap:16px
    }
    .metric{padding:18px}
    .metric strong{font-size:30px;display:block;line-height:1;color:var(--text)}
    .metric span{color:var(--muted);font-size:13px}
    .metric .tag{display:inline-flex;margin-top:10px;padding:5px 10px;border-radius:999px;background:#f3e8ff;color:#6d28d9;font-size:12px;font-weight:700}
    .card, .feature, .case, .review-card, .article, .faq-item, .form-card, .compare-card, .timeline-card, .network-card{overflow:hidden}
    .card, .feature, .case, .review-card, .article{padding:20px}
    .feature h3,.case h3,.review-card h3,.article h3{margin:0 0 8px;font-size:18px}
    .feature p,.case p,.review-card p,.article p{margin:0;color:var(--muted)}
    .feature .meta,.case .meta,.article .meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
    .pill{display:inline-flex;padding:5px 10px;border-radius:999px;background:#f4f1ff;color:#5730a3;font-size:12px;font-weight:700}
    .pill.alt{background:#fff2f2;color:#c2415f}
    .section-title span{display:block;font-size:13px;color:#8a6d3b;margin-bottom:8px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .list{
      margin:0;padding:0;list-style:none;display:grid;gap:12px
    }
    .list li{
      display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:16px;background:#fff;border:1px solid var(--line)
    }
    .dot{width:10px;height:10px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-2));margin-top:7px;flex:0 0 auto}
    .table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;border-bottom:1px solid rgba(31,41,55,.08);vertical-align:top;text-align:left;font-size:14px}
    th{background:#fbf7ff;color:#4c1d95;font-size:13px;letter-spacing:.02em}
    tr:hover td{background:#fffdfa}
    .compare-banner{
      display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
      padding:18px 20px;background:linear-gradient(135deg, rgba(109,40,217,.08), rgba(255,77,109,.08));border:1px solid rgba(109,40,217,.15);border-radius:20px;margin-bottom:16px
    }
    .score{
      display:flex;flex-direction:column;align-items:flex-end;gap:4px;text-align:right
    }
    .score strong{font-size:28px;color:#6d28d9}
    .tags-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{
      padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);position:relative
    }
    .step b{display:inline-flex;width:36px;height:36px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:18px}
    .step p{margin:0;color:var(--muted)}
    .faq-item{margin-bottom:12px;background:#fff}
    .faq-q{
      width:100%;text-align:left;background:none;border:0;padding:18px 20px;font-size:16px;font-weight:700;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);display:none}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q{color:#6d28d9}
    .chev{transition:transform .2s ease}
    .faq-item.active .chev{transform:rotate(180deg)}
    .form-card{padding:22px}
    form{display:grid;gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(109,40,217,.45);box-shadow:0 0 0 4px rgba(109,40,217,.10)}
    .footer{
      padding:22px 0 28px;border-top:1px solid rgba(31,41,55,.08);background:#f8f6f1
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer a{color:#374151}
    .footer small,.footer p{color:#5f6773}
    .contact-box,.qr-box{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line)}
    .qr-box{display:flex;gap:16px;align-items:center}
    .qr-box img{width:120px;border-radius:16px;border:1px solid var(--line)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      display:flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:999px;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 16px 32px rgba(109,40,217,.22)
    }
    .backtop{background:#111827}
    .hidden-mobile-menu{display:flex;align-items:center;gap:14px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .reveal.in{opacity:1;transform:none}
    .articles-list{display:grid;gap:12px}
    .article-row{display:flex;justify-content:space-between;gap:12px;align-items:center}
    .article-row a{color:#6d28d9;font-weight:700}
    .mini-note{font-size:13px;color:var(--muted)}
    .hero-image-card{
      padding:20px;border-radius:26px;background:linear-gradient(180deg, rgba(255,255,255,.86), rgba(244,239,232,.84));border:1px solid var(--line)
    }
    .hero-image-card .mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .hero-image-card .mini-grid .slot{
      min-height:110px;border-radius:18px;background:
        linear-gradient(135deg, rgba(109,40,217,.12), rgba(255,77,109,.10)),
        linear-gradient(180deg,#fff,#f8f2ff);
      border:1px solid rgba(109,40,217,.12)
    }
    .hero-image-card .mini-grid .slot:last-child{
      background:
        linear-gradient(135deg, rgba(255,183,3,.12), rgba(34,197,94,.08)),
        linear-gradient(180deg,#fff,#fffaf0)
    }
    .caption{margin-top:12px;color:var(--muted);font-size:13px}
    .service-grid .feature:nth-child(odd){background:linear-gradient(180deg,#fff,#fffaf8)}
    .service-grid .feature:nth-child(even){background:linear-gradient(180deg,#fff,#f9f7ff)}
    .case .thumb,.article .thumb{
      height:10px;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2));margin-bottom:14px
    }
    .timeline-grid{grid-template-columns:repeat(3,1fr)}
    .timeline-card{padding:20px}
    .timeline-card b{display:block;color:#6d28d9;margin-bottom:8px}
    .network-grid{grid-template-columns:repeat(4,1fr)}
    @media (max-width: 1024px){
      .hero-grid,.split,.footer-grid,.grid-2{grid-template-columns:1fr}
      .metric-grid,.feature-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.timeline-grid{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr)}
      nav ul{gap:12px}
    }
    @media (max-width: 760px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .menu-btn{display:inline-flex}
      .hidden-mobile-menu{
        position:absolute;left:0;right:0;top:100%;padding:12px 0 14px;display:none;flex-direction:column;align-items:stretch;background:rgba(246,244,239,.98);border-bottom:1px solid rgba(31,41,55,.08);box-shadow:0 18px 30px rgba(15,23,42,.08)
      }
      .hidden-mobile-menu.open{display:flex}
      nav ul{flex-direction:column;padding:0 16px;gap:8px}
      .nav-wrap{position:relative}
      .hero-points,.metric-grid,.feature-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.timeline-grid,.steps{grid-template-columns:1fr}
      h1{font-size:30px}
      .hero-copy{padding:22px}
      .hero-actions{flex-direction:column}
      .cta-btn,.ghost-btn,.primary-btn{width:100%}
      .score{align-items:flex-start;text-align:left}
      .qr-box{flex-direction:column;align-items:flex-start}
    }