:root{
      --bg:#f5f8fb;
      --panel:#ffffff;
      --panel-2:#eef7fb;
      --text:#102233;
      --muted:#5b6c7d;
      --line:#d8e4ec;
      --primary:#0b8ea5;
      --primary-2:#17b7aa;
      --accent:#2f6fed;
      --shadow:0 18px 50px rgba(16,34,51,.08);
      --radius:22px;
      --radius-sm:16px;
      --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;
      background:
        radial-gradient(circle at top left, rgba(23,183,170,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(47,111,237,.10), transparent 22%),
        linear-gradient(180deg, #f8fbfd 0%, #f4f8fb 38%, #f8fbfd 100%);
      color:var(--text);
    }
    a{color:inherit;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:30;
      backdrop-filter:saturate(160%) blur(14px);
      background:rgba(245,248,251,.82);
      border-bottom:1px solid rgba(216,228,236,.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 .ai-page-logo{width:44px; height:44px; object-fit:contain; border-radius:12px; background:#fff; padding:6px; box-shadow:0 8px 24px rgba(16,34,51,.08)}
    .brand-text{display:flex; flex-direction:column; min-width:0}
    .brand-text strong{font-size:18px; letter-spacing:.4px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .nav-toggle{display:none; border:1px solid var(--line); background:var(--panel); color:var(--text); border-radius:12px; padding:10px 12px}
    .nav-links{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:var(--muted); padding:8px 10px; border-radius:10px}
    .nav-links a:hover,.nav-links a.active{background:#eaf7fb; color:var(--primary)}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:20px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.soft-card,.review-card,.case-card,.info-card,.faq-item,.form-card,.quote-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(216,228,236,.95);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 14px; border-radius:999px; background:#e9f7fb; color:var(--primary); font-size:13px; font-weight:600}
    h1{margin:16px 0 14px; font-size:clamp(30px, 5vw, 52px); line-height:1.08; letter-spacing:-.8px}
    .hero p{margin:0; color:var(--muted); line-height:1.8; font-size:16px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      min-height:46px; padding:0 18px; border-radius:14px; border:1px solid transparent;
      font-weight:700; transition:.25s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; box-shadow:0 16px 30px rgba(11,142,165,.24)}
    .btn-secondary{background:#fff; border-color:var(--line); color:var(--text)}
    .btn:hover{transform:translateY(-2px); box-shadow:0 14px 28px rgba(16,34,51,.12)}
    .hero-highlights{
      margin-top:24px; display:grid; grid-template-columns:repeat(3,1fr); gap:12px
    }
    .mini-stat{
      padding:16px; border-radius:18px; background:linear-gradient(180deg,#f8fdff,#eef8fb); border:1px solid #dceaf1
    }
    .mini-stat b{display:block; font-size:22px; margin-bottom:4px}
    .mini-stat span{font-size:13px; color:var(--muted); line-height:1.55}
    .hero-side{padding:22px}
    .side-title{font-size:18px; margin:0 0 14px}
    .pill-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .pill{padding:9px 12px; border-radius:999px; background:#f4fbfd; border:1px solid #dceaf1; color:#244050; font-size:13px}
    .side-stack{display:grid; gap:12px; margin-top:16px}
    .stat-row{display:flex; justify-content:space-between; gap:12px; padding:14px 16px; border-radius:16px; background:#f7fbfd; border:1px solid #dceaf1}
    .stat-row b{font-size:16px}
    .stat-row span{font-size:13px; color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:clamp(22px, 3vw, 32px)}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:720px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .section-card,.soft-card,.review-card,.case-card,.info-card,.faq-item,.form-card,.quote-card{padding:22px}
    .service-card h3,.case-card h3,.info-card h3,.review-card h3{margin:0 0 10px; font-size:18px}
    .service-card p,.case-card p,.info-card p,.review-card p,.soft-card p{margin:0; color:var(--muted); line-height:1.75}
    .icon-box{width:46px; height:46px; border-radius:14px; display:grid; place-items:center; background:linear-gradient(135deg,#e8fbfa,#eaf2ff); color:var(--primary); margin-bottom:12px; font-weight:800}
    .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{padding:20px; border-radius:18px; background:linear-gradient(180deg,#ffffff,#f5fbfd); border:1px solid var(--line)}
    .step b{display:inline-flex; width:34px; height:34px; align-items:center; justify-content:center; border-radius:12px; background:#e9f7fb; color:var(--primary); margin-bottom:12px}
    .step h3{margin:0 0 8px; font-size:16px}
    .step p{margin:0; color:var(--muted); line-height:1.7; font-size:14px}
    .table-wrap{overflow-x:auto; border-radius:18px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:16px 14px; text-align:left; border-bottom:1px solid #e6eef3; vertical-align:top}
    th{background:#f3fbfd; font-size:14px}
    td{font-size:14px; color:#304355}
    .badge{display:inline-flex; align-items:center; padding:6px 10px; border-radius:999px; background:#e9f7fb; color:var(--primary); font-size:12px; font-weight:700}
    .compare-hero{display:grid; grid-template-columns:1fr 1fr; gap:16px}
    .score-card{
      background:linear-gradient(135deg, rgba(11,142,165,.09), rgba(47,111,237,.08));
      border:1px solid #cfe6ee;
      border-radius:22px;
      padding:24px;
    }
    .score{font-size:44px; font-weight:800; margin:8px 0 8px}
    .score small{font-size:16px; color:var(--muted); font-weight:600}
    .rating{display:flex; gap:6px; font-size:18px; color:#f3b400; margin:8px 0 12px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .form-group{display:flex; flex-direction:column; gap:8px}
    label{font-size:14px; color:#32485a; font-weight:600}
    input,select,textarea{
      width:100%; border:1px solid #d8e4ec; background:#fff; color:var(--text); border-radius:14px;
      padding:13px 14px; font:inherit; outline:none; transition:.2s ease;
    }
    textarea{min-height:132px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8ecfe0; box-shadow:0 0 0 4px rgba(23,183,170,.12)}
    .full{grid-column:1/-1}
    .faq-list{display:grid; gap:12px}
    .faq-item summary{list-style:none; cursor:pointer; font-weight:700; color:var(--text)}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{margin:12px 0 0; color:var(--muted); line-height:1.75}
    .footer{
      margin-top:18px;
      background:#0f2436;
      color:#d7e6f0;
      padding:28px 0 20px;
    }
    .footer a{color:#b5ddff}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr 1fr; gap:18px}
    .footer h3,.footer h4{margin:0 0 12px}
    .footer p{margin:0; color:#bfd2df; line-height:1.75}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 10px; border:1px solid rgba(255,255,255,.12); border-radius:10px; background:rgba(255,255,255,.03)}
    .copyright{margin-top:18px; padding-top:14px; border-top:1px solid rgba(255,255,255,.12); color:#aecdde; font-size:13px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:40; display:grid; gap:10px
    }
    .float-btn{
      display:inline-flex; align-items:center; justify-content:center; min-width:48px; height:48px; padding:0 16px;
      border-radius:999px; background:linear-gradient(135deg,var(--primary),var(--accent)); color:#fff;
      box-shadow:0 14px 30px rgba(11,142,165,.3); border:none; cursor:pointer; font-weight:700
    }
    .float-panel{
      display:none; width:280px; background:#fff; border:1px solid var(--line); border-radius:20px; box-shadow:var(--shadow); padding:16px;
    }
    .float-panel.open{display:block}
    .qr{border-radius:18px; overflow:hidden; border:1px solid var(--line); margin-top:10px}
    .article-list,.tag-cloud,.network-list,.timeline,.review-grid,.case-grid,.help-grid{display:grid; gap:14px}
    .article-item,.network-item,.timeline-item{padding:16px 18px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .article-item a{color:var(--text); font-weight:700}
    .article-item p,.network-item p,.timeline-item p{margin:6px 0 0; color:var(--muted); line-height:1.65; font-size:14px}
    .tag-cloud{grid-template-columns:repeat(4,1fr)}
    .tag-cloud .pill{justify-content:center; text-align:center}
    .muted{color:var(--muted)}
    .feature-image-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .feature-image-grid img,.case-media img{border-radius:18px; width:100%; height:auto; border:1px solid var(--line); background:#fff}
    .review-grid{grid-template-columns:repeat(3,1fr)}
    .case-grid{grid-template-columns:repeat(2,1fr)}
    .help-grid{grid-template-columns:repeat(3,1fr)}
    .linkline{display:flex; flex-wrap:wrap; gap:10px}
    .linkline a{padding:8px 10px; border-radius:10px; background:#f4fbfd; border:1px solid #dceaf1; color:#274154}
    .topline{display:flex; flex-wrap:wrap; gap:12px; align-items:center}
    .anchor{scroll-margin-top:90px}
    .note{
      padding:14px 16px; border-left:4px solid var(--primary); background:#f3fbfd; border-radius:14px; color:#355164; line-height:1.7
    }
    .mobile-hidden{display:block}
    .panel-title{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px}
    .case-media{margin-top:12px}
    .case-media .grid-2{margin-top:12px}
    @media (max-width: 1024px){
      .hero-grid,.grid-3,.grid-2,.steps,.compare-hero,.footer-grid,.review-grid,.case-grid,.help-grid{grid-template-columns:1fr}
      .tag-cloud{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:16px; right:16px; top:72px; background:#fff; border:1px solid var(--line);
        border-radius:18px; padding:12px; box-shadow:var(--shadow); flex-direction:column; align-items:stretch;
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 12px}
      .hero-main{padding:24px}
      .hero-highlights,.feature-image-grid,.form-grid,.tag-cloud{grid-template-columns:1fr}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .floating{right:12px; bottom:12px}
      .float-panel{width:min(280px, calc(100vw - 24px))}
    }
    .reveal{opacity:0; transform:translateY(16px); transition:.65s ease}
    .reveal.in{opacity:1; transform:none}