:root{
      --bg:#f5f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#152033;
      --muted:#5e6b82;
      --line:#dce4f2;
      --brand:#5d5cf8;
      --brand2:#19c2ff;
      --accent:#ff4fd8;
      --good:#1ea97c;
      --shadow:0 18px 50px rgba(34,52,84,.10);
      --radius:22px;
      --radius-sm:16px;
      --max:1200px;
    }
    *{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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(93,92,248,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(25,194,255,.12), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
    }
    a{color:inherit;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(251,252,255,.82);
      border-bottom:1px solid rgba(220,228,242,.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;border-radius:12px;background:#fff;box-shadow:0 10px 24px rgba(50,70,120,.08)}
    .brand strong{display:block;font-size:16px;letter-spacing:.5px}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .nav-links a{
      padding:8px 12px;border-radius:999px;color:var(--text);font-size:14px;
      transition:.22s ease;background:transparent;
    }
    .nav-links a:hover,.nav-links a.active{background:rgba(93,92,248,.10);color:var(--brand)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
      box-shadow:0 10px 24px rgba(93,92,248,.18);
    }
    .btn:hover{transform:translateY(-1px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff}
    .btn-secondary{background:#eef2ff;color:var(--brand);box-shadow:none;border:1px solid #dbe2ff}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);box-shadow:none;padding:10px 12px;border-radius:12px}
    .hero{padding:34px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.panel,.section-card,.form-card,.review-card,.article-card,.faq-item,.compare-card{
      background:rgba(255,255,255,.92); border:1px solid rgba(220,228,242,.9); 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:50%; filter:blur(10px); pointer-events:none;
    }
    .hero-main::before{width:180px;height:180px;right:-40px;top:-45px;background:rgba(25,194,255,.18)}
    .hero-main::after{width:160px;height:160px;right:90px;bottom:-70px;background:rgba(255,79,216,.16)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(93,92,248,.10);color:var(--brand);font-weight:700;font-size:13px}
    h1{font-size:clamp(30px,4vw,52px);line-height:1.05;margin:16px 0 14px}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .mini-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-points div{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff,#f6f8ff);border:1px solid #e2e8f6}
    .mini-points strong{display:block;font-size:18px}
    .mini-points span{font-size:12px;color:var(--muted)}
    .hero-side{display:grid;gap:14px}
    .panel{padding:20px}
    .panel h2,.section-title{font-size:24px;margin:0 0 10px}
    .panel p,.section-sub{margin:0;color:var(--muted);line-height:1.8}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid #e3eaf7}
    .stat b{display:block;font-size:24px;color:var(--text)}
    .stat span{font-size:12px;color:var(--muted)}
    .section{padding:16px 0 2px}
    .section-card{padding:26px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px}
    .section-kicker{color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card,.case-card,.network-card,.review-card,.article-card,.faq-item,.compare-card,.timeline-item{
      padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid #e2e8f6
    }
    .service-card h3,.case-card h3,.network-card h3,.review-card h3,.article-card h3{margin:0 0 8px;font-size:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#eef4ff;border:1px solid #dbe5ff;color:#345; font-size:13px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f9fbff);border:1px solid #e2e8f6;position:relative}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;margin-bottom:12px}
    .compare-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border-radius:18px;border:1px solid #dce4f2}
    .compare-table th,.compare-table td{padding:14px 12px;border-bottom:1px solid #e7edf7;text-align:left;font-size:14px;vertical-align:top}
    .compare-table th{background:#f4f7ff}
    .compare-table tr:last-child td{border-bottom:0}
    .badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:rgba(30,169,124,.12);color:var(--good);font-size:12px;font-weight:700}
    .columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .price-box{padding:18px;border-radius:20px;background:linear-gradient(135deg,#111a34,#273868);color:#fff}
    .price-box h3,.price-box p{margin:0}
    .price-box ul{margin:14px 0 0;padding-left:18px;color:rgba(255,255,255,.92);line-height:1.9}
    .accordion{display:grid;gap:12px}
    .faq-item button{
      width:100%;border:0;background:transparent;padding:0;font:inherit;color:inherit;text-align:left;cursor:pointer;
      display:flex;justify-content:space-between;align-items:center;gap:14px;
    }
    .faq-item .answer{max-height:0;overflow:hidden;transition:max-height .28s ease;padding-top:0;color:var(--muted);line-height:1.8}
    .faq-item.open .answer{max-height:180px;padding-top:10px}
    .faq-item .icon{transition:transform .2s ease;color:var(--brand);font-weight:900}
    .faq-item.open .icon{transform:rotate(45deg)}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-meta{display:flex;align-items:center;gap:10px;margin-top:12px;color:var(--muted);font-size:13px}
    .avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent))}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card time{display:block;color:var(--muted);font-size:12px;margin-bottom:10px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid #d9e1ef;background:#fff;color:var(--text);
      outline:none;transition:border .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8da0ff;box-shadow:0 0 0 4px rgba(93,92,248,.10)}
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid #dce4f2;background:#f8faff;color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px;align-items:start}
    .footer a{color:#273868}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid #d8e0f2;background:#fff;display:grid;place-items:center;
      box-shadow:0 10px 22px rgba(34,52,84,.12);cursor:pointer;color:var(--brand);font-size:18px
    }
    .scroll-top{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s ease}
    .scroll-top.show{opacity:1;pointer-events:auto;transform:none}
    .mobile-only{display:none}
    .scroll-x{overflow:auto}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item strong{display:block;margin-bottom:8px}
    .muted{color:var(--muted)}
    .resource-images{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .resource-images img{border-radius:18px;border:1px solid #dfe6f4;object-fit:cover}
    .center{text-align:center}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.reviews,.articles,.footer-grid,.grid-2,.columns,.steps,.timeline{grid-template-columns:1fr}
      .mini-points{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-grid}
      .nav-cta .btn-secondary{display:none}
      .mobile-only{display:block}
      .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
      .nav.open{position:relative}
      .nav.open .nav-links a{width:calc(50% - 5px);text-align:center}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero-main,.panel,.section-card,.form-card{padding:20px}
      .section-head{flex-direction:column;align-items:start}
      .nav.open .nav-links a{width:100%}
      .compare-table{display:block}
      .compare-table thead{display:none}
      .compare-table tr{display:block;border-bottom:1px solid #e7edf7}
      .compare-table td{display:block;border:0;padding:10px 12px}
      .compare-table td::before{content:attr(data-label) "：";font-weight:700;color:#334}
      .resource-images{grid-template-columns:1fr}
    }
    [data-reveal]{opacity:0;transform:translateY(18px);transition:.55s ease}
    [data-reveal].in{opacity:1;transform:none}