:root{
      --bg:#f7f5ef;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#1f2a37;
      --muted:#5d6b7b;
      --line:#dfe5ee;
      --primary:#2b6cff;
      --primary2:#7c4dff;
      --accent:#ff8a4c;
      --success:#1f9d6a;
      --shadow:0 18px 50px rgba(39,55,86,.10);
      --radius:22px;
      --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",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(43,108,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(255,138,76,.12), transparent 26%),
        linear-gradient(180deg, #fff 0%, var(--bg) 28%, #f4f7ff 100%);
      line-height:1.7;
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(223,229,238,.8);
    }
    .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 img{width:42px;height:42px;object-fit:contain}
    .brand strong{display:block;font-size:18px;line-height:1.2}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .menu{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .menu a{color:var(--text); font-size:14px; opacity:.88}
    .menu a:hover,.menu a:focus{color:var(--primary)}
    .nav-actions{display:flex; align-items:center; gap:10px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:999px; border:1px solid transparent;
      font-weight:700; transition:.22s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff; box-shadow:0 10px 24px rgba(43,108,255,.22)}
    .btn-ghost{background:#fff; color:var(--text); border-color:var(--line)}
    .btn:hover{transform:translateY(-2px); box-shadow:var(--shadow)}
    .mobile-toggle{display:none}
    .hero{
      position:relative;
      padding:54px 0 26px;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:radial-gradient(circle, rgba(43,108,255,.18), transparent 65%);
      animation:float 9s ease-in-out infinite;
    }
    .hero::before{width:340px;height:340px;left:-120px;top:-80px}
    .hero::after{width:260px;height:260px;right:-80px;bottom:20px;animation-duration:11s}
    @keyframes float{50%{transform:translateY(16px)}}
    .hero-grid{
      display:grid; grid-template-columns:1.1fr .9fr; gap:22px; align-items:stretch;
    }
    .hero-copy,.hero-side,.panel,.card,.review,.faq-item,.form-card,.price-box,.timeline,.compare,.article,.case,.tag-cloud,.network{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(223,229,238,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px}
    .kicker{
      display:inline-flex; gap:8px; align-items:center; padding:8px 14px;
      background:rgba(43,108,255,.10); color:#1f4ecf; border-radius:999px; font-size:13px; font-weight:700;
    }
    h1{font-size:clamp(30px,4.8vw,54px); line-height:1.08; margin:16px 0 14px}
    .lead{font-size:17px; color:var(--muted); margin:0 0 20px; max-width:58ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 0}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .mini{
      padding:14px; border-radius:18px; background:linear-gradient(180deg,#fff, #f7f9ff); border:1px solid var(--line);
    }
    .mini b{display:block; font-size:18px}
    .mini span{font-size:13px; color:var(--muted)}
    .hero-side{padding:22px; display:grid; gap:14px}
    .hero-stats{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .stat{
      padding:18px; border-radius:18px; background:linear-gradient(180deg,#ffffff,#f4f7ff);
      border:1px solid var(--line);
    }
    .stat b{display:block; font-size:24px; color:#173a8a}
    .stat span{font-size:13px; color:var(--muted)}
    .hero-note{
      padding:16px 18px; border-radius:18px; background:linear-gradient(135deg, rgba(255,138,76,.12), rgba(124,77,255,.10));
      border:1px dashed rgba(124,77,255,.25);
    }
    section{padding:24px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:14px; margin-bottom:16px}
    .section-head h2{font-size:clamp(24px,3vw,36px); margin:0}
    .section-head p{margin:0; color:var(--muted); max-width:68ch}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .card{padding:22px}
    .card h3,.panel h3,.article h3,.case h3{margin:0 0 10px; font-size:18px}
    .card p,.panel p,.article p,.case p{margin:0; color:var(--muted)}
    .badge{
      display:inline-flex; align-items:center; gap:6px;
      padding:7px 11px; border-radius:999px; background:#f1f5ff; color:#3157c9; font-size:12px; font-weight:700;
    }
    .services{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .service-list{margin:14px 0 0; padding:0; list-style:none; display:grid; gap:10px}
    .service-list li{display:flex; gap:10px; color:var(--text)}
    .service-list li::before{content:"✦"; color:var(--accent); flex:none}
    .panel{padding:22px}
    .chip-cloud{display:flex; flex-wrap:wrap; gap:10px; margin-top:14px}
    .chip{padding:8px 12px; border-radius:999px; background:#fff7ef; border:1px solid #ffd9bf; font-size:13px}
    .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step{padding:20px; border-radius:20px; background:#fff; border:1px solid var(--line); position:relative}
    .step em{font-style:normal; display:inline-flex; width:32px; height:32px; align-items:center; justify-content:center; border-radius:10px; background:linear-gradient(135deg,var(--primary),var(--accent)); color:#fff; font-weight:800; margin-bottom:12px}
    .compare-wrap{overflow:auto}
    table{width:100%; border-collapse:separate; border-spacing:0; min-width:860px}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top; background:#fff}
    th{background:#f6f8ff; color:#21324a}
    tr:first-child th:first-child{border-top-left-radius:14px}
    tr:first-child th:last-child{border-top-right-radius:14px}
    .highlight{font-weight:800; color:var(--success)}
    .compare-grid{display:grid; grid-template-columns:.9fr 1.1fr; gap:16px}
    .rating{
      padding:24px; border-radius:22px; background:linear-gradient(135deg,#fff, #f3f7ff);
      border:1px solid var(--line);
    }
    .stars{color:#ffb400; letter-spacing:2px; font-size:22px}
    .faq{display:grid; gap:12px}
    .faq-item summary{
      list-style:none; cursor:pointer; padding:18px 20px; font-weight:700;
      display:flex; justify-content:space-between; gap:12px; align-items:center;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"＋"; color:var(--primary); font-size:20px}
    .faq-item[open] summary::after{content:"－"}
    .faq-item .faq-body{padding:0 20px 18px; color:var(--muted)}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review{padding:20px}
    .review .meta{display:flex; justify-content:space-between; gap:10px; margin-bottom:12px; font-size:13px; color:var(--muted)}
    .review strong{color:var(--text)}
    .articles,.cases,.networks{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article,.case,.network{padding:20px}
    .article time{display:block; color:var(--muted); font-size:13px; margin-top:12px}
    .tag-cloud{padding:20px}
    .tag-cloud .chip{margin:0 8px 10px 0}
    .price-box{padding:22px}
    .price-box ul{margin:12px 0 0; padding-left:18px; color:var(--muted)}
    .form-card{padding:24px}
    form{display:grid; gap:14px}
    .field-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:grid; gap:7px; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:12px 14px;
      font:inherit; color:var(--text); background:#fff;
    }
    textarea{min-height:120px; resize:vertical}
    .footer{
      margin-top:20px;
      padding:22px 0 30px;
      background:#f3f6fb;
      border-top:1px solid var(--line);
      color:#314154;
    }
    .footer-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:18px; align-items:start}
    .footer a{color:#1e56d8}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:54px; height:54px; border-radius:18px; display:flex; align-items:center; justify-content:center;
      background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff; box-shadow:var(--shadow);
      border:none; cursor:pointer;
    }
    .backtop{position:fixed; left:16px; bottom:16px; z-index:60}
    .mobile-panel{display:none}
    .image-strip{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .image-strip img,.single-image img{border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow)}
    .section-anchor{scroll-margin-top:92px}
    .ai-page-home-link{font-weight:700}
    .scroll-in{opacity:0; transform:translateY(18px); transition:.6s ease}
    .scroll-in.visible{opacity:1; transform:translateY(0)}
    @media (max-width: 980px){
      .hero-grid,.compare-grid,.grid-3,.grid-4,.services,.steps,.reviews,.articles,.cases,.networks,.footer-grid{grid-template-columns:1fr}
      .hero-points,.hero-stats,.field-grid,.image-strip{grid-template-columns:1fr 1fr}
      .menu{display:none}
      .mobile-toggle{display:inline-flex}
      .mobile-panel{
        display:none; padding:0 0 16px;
      }
      .mobile-panel.open{display:block}
      .mobile-panel .menu{display:grid; gap:10px; justify-content:start; padding:10px 0 0}
      .nav{align-items:center; flex-wrap:wrap}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero{padding-top:26px}
      .hero-copy,.hero-side,.card,.panel,.review,.faq-item,.form-card,.price-box,.timeline,.compare,.article,.case,.tag-cloud,.network{border-radius:18px}
      .hero-copy{padding:24px}
      .hero-points,.hero-stats,.field-grid,.image-strip{grid-template-columns:1fr}
      .btn{width:100%}
      .nav-actions{width:100%}
      .nav-actions .btn{width:auto}
      .section-head{flex-direction:column; align-items:start}
    }