:root{
      --bg:#f7fafc;
      --panel:#ffffff;
      --panel-2:#f1f7ff;
      --line:#dbe7f3;
      --text:#1f2a37;
      --muted:#5b6b7d;
      --brand:#2278ff;
      --brand-2:#2dd4bf;
      --accent:#ffb703;
      --shadow:0 18px 40px rgba(31,42,55,.08);
      --radius:22px;
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(34,120,255,.08), transparent 32%),
        radial-gradient(circle at top right, rgba(45,212,191,.08), transparent 30%),
        linear-gradient(180deg, #fdfefe 0%, #f7fbff 45%, #f7fafc 100%);
    }
    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}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(140%) blur(16px);
      background:rgba(247,250,252,.86);
      border-bottom:1px solid rgba(219,231,243,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:72px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;flex:none;border-radius:12px}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;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:#eaf2ff}
    .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:12px 18px;font-weight:700;font-size:14px;cursor:pointer;
      transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
      white-space:nowrap;
    }
    .btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(34,120,255,.14)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#5b8cff);color:#fff}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px}
    .hero{padding:36px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.info-card,.service-card,.review-card,.faq-item,.form-card,.quote-card,.timeline-card,.compare-card,.article-card,.contact-card,.price-card{
      background:var(--panel);border:1px solid rgba(219,231,243,.95);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:30px; position:relative; overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;background:rgba(34,120,255,.12);right:-60px;top:-30px}
    .hero-main::after{width:160px;height:160px;background:rgba(45,212,191,.12);left:42%;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#edf5ff;color:#1f4fbf;border:1px solid #d4e5ff;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.06;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .chip{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:9px 12px;background:#f4f8ff;border:1px solid #dce9ff;color:#31507b;font-size:13px}
    .hero-side{padding:22px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--line)}
    .metric strong{display:block;font-size:28px;line-height:1;color:#17324d}
    .metric span{display:block;margin-top:8px;font-size:13px;color:var(--muted);line-height:1.6}
    .hero-mini{margin-top:14px;padding:16px;border-radius:18px;background:linear-gradient(135deg,#f2f8ff,#ecfffb);border:1px solid #d9ebff}
    .hero-mini h3{margin:0 0 8px;font-size:16px}
    .hero-mini p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .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:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .section-card{padding:22px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .service-card,.review-card,.article-card,.compare-card,.contact-card,.price-card,.timeline-card{padding:18px}
    .service-card h3,.review-card h3,.article-card h3,.price-card h3,.timeline-card h3{margin:10px 0 8px;font-size:18px}
    .service-card p,.review-card p,.article-card p,.price-card p,.timeline-card p,.compare-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,#e7f1ff,#edfdf8);color:#1659d6;font-weight:900
    }
    .step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);position:relative}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:#e9f1ff;color:#1b4cb6}
    .step h3{margin:12px 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:780px;background:#fff}
    th,td{padding:14px 14px;border-bottom:1px solid #edf2f7;text-align:left;vertical-align:top;font-size:14px;line-height:1.7}
    th{background:#f6faff;color:#18324d;font-size:13px}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#edf5ff;color:#1f4fbf;font-size:12px;font-weight:700}
    .badge.green{background:#eafaf4;color:#107b4c}
    .badge.orange{background:#fff4e5;color:#a65b00}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tags span{padding:9px 12px;border-radius:999px;background:#f5f8fc;border:1px solid var(--line);font-size:13px;color:#38506b}
    .timeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .timeline-card{position:relative}
    .timeline-card .num{font-size:12px;color:#1f4fbf;font-weight:800}
    .timeline-card h3{font-size:16px}
    .compare-score{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:8px 0 14px}
    .stars{color:#f5a623;font-size:18px;letter-spacing:2px}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-meta{display:flex;align-items:center;gap:12px;margin-bottom:10px}
    .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#dbeafe,#d1fae5);display:grid;place-items:center;font-weight:800;color:#123}
    .review-card .role{font-size:12px;color:var(--muted)}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-card .date{font-size:12px;color:#6b7f95}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    label{display:block;font-size:13px;font-weight:700;margin:0 0 8px;color:#25364a}
    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;transition:border-color .18s, box-shadow .18s
    }
    input:focus,select:focus,textarea:focus{border-color:#7fb0ff;box-shadow:0 0 0 4px rgba(34,120,255,.08)}
    textarea{min-height:124px;resize:vertical}
    .form-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:14px}
    .note{color:var(--muted);font-size:13px;line-height:1.7}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
      background:transparent;border:0;padding:18px;cursor:pointer;text-align:left;color:var(--text);font:inherit
    }
    .faq-q strong{font-size:16px;line-height:1.5}
    .faq-a{max-height:0;overflow:hidden;padding:0 18px;color:var(--muted);transition:max-height .25s ease,padding .25s ease}
    .faq-item.open .faq-a{max-height:180px;padding:0 18px 18px}
    .faq-item.open .faq-q .chev{transform:rotate(180deg)}
    .chev{transition:transform .2s ease}
    .footer{
      margin-top:24px;padding:24px 0 30px;border-top:1px solid rgba(219,231,243,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.75), rgba(244,248,252,.92));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer small,.footer a{color:#324b66}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;font-size:18px
    }
    .客服{
      position:fixed;left:18px;bottom:18px;z-index:60;width:min(320px, calc(100vw - 36px));
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden
    }
    .客服-header{padding:14px 16px;background:linear-gradient(135deg,#eaf2ff,#eefbf7);display:flex;justify-content:space-between;align-items:center;gap:12px}
    .客服-body{padding:14px 16px;display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:center}
    .客服-body p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .hidden-mobile{display:block}
    .service-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .mini-list{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:8px}
    .mini-list li{display:flex;gap:8px;align-items:flex-start;color:var(--muted);font-size:14px;line-height:1.7}
    .mini-list li::before{content:"•";color:var(--brand);font-weight:900}
    .scroll-top{display:none}
    @media (max-width: 1040px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.service-map,.timeline{grid-template-columns:1fr 1fr}
      .step-list{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.service-map,.timeline,.step-list,.form-grid{grid-template-columns:1fr}
      .hero{padding-top:22px}
      .hero-main{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .客服{left:14px;right:14px;bottom:78px;width:auto}
      .hidden-mobile{display:none}
      .floating{right:14px;bottom:14px}
    }
    .mobile-menu{
      display:none;padding:0 0 14px
    }
    .mobile-menu.open{display:block}
    .mobile-menu a{display:block;padding:12px 0;border-top:1px solid #edf2f7;color:var(--muted)}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease, transform .5s ease}
    .reveal.in{opacity:1;transform:none}