:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f3f7ff;
      --text:#1b2430;
      --muted:#5f6b7a;
      --line:#dbe3ef;
      --brand:#3b82f6;
      --brand-2:#7c3aed;
      --brand-3:#06b6d4;
      --accent:#f97316;
      --ok:#16a34a;
      --shadow:0 18px 45px rgba(30, 41, 59, .08);
      --radius:22px;
      --radius-sm:16px;
      --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 15% 10%, rgba(59,130,246,.10), transparent 22%),
        radial-gradient(circle at 85% 0%, rgba(124,58,237,.10), transparent 20%),
        linear-gradient(180deg, #fbfcff 0%, #f6f8fc 100%);
    }
    a{color:var(--brand);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:50;
      backdrop-filter: blur(14px);
      background:rgba(251,252,255,.82);
      border-bottom:1px solid rgba(219,227,239,.7);
    }
    .nav-wrap{display:flex; align-items:center; justify-content:space-between; gap:16px; min-height:74px}
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 6px 18px rgba(15,23,42,.08)}
    .brand strong{display:block;font-size:1rem;line-height:1.1}
    .brand span{display:block;font-size:.82rem;color:var(--muted);margin-top:3px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav a{color:var(--text);font-size:.95rem}
    .nav a:hover{color:var(--brand)}
    .home-btn{
      display:inline-flex;align-items:center;gap:8px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff!important;padding:11px 16px;border-radius:999px;
      box-shadow:0 10px 24px rgba(59,130,246,.24);
      transition:.25s ease;
    }
    .home-btn:hover{transform:translateY(-1px)}
    main{display:block}
    section{padding:72px 0}
    .hero{padding:28px 0 42px}
    .hero-grid{display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.quote,.faq-item,.form-box,.review-card,.article-card,.compare-box,.price-card,.timeline-item{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(219,227,239,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px; position:relative; overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:""; position:absolute; border-radius:999px; filter:blur(4px); opacity:.7; pointer-events:none;
    }
    .hero-main::before{width:220px;height:220px;background:radial-gradient(circle, rgba(6,182,212,.18), transparent 70%); top:-60px; right:-30px}
    .hero-main::after{width:180px;height:180px;background:radial-gradient(circle, rgba(124,58,237,.16), transparent 70%); bottom:-50px; left:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:var(--panel-2);color:var(--brand-2);font-weight:700;font-size:.92rem}
    h1{font-size:clamp(2rem, 4vw, 3.7rem);line-height:1.08;margin:18px 0 14px}
    .lead{font-size:1.05rem;line-height:1.8;color:var(--muted);max-width:56ch;margin:0}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;transition:.25s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(30,41,59,.12)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line)}
    .metric strong{display:block;font-size:1.3rem}
    .metric span{display:block;color:var(--muted);font-size:.9rem;margin-top:6px;line-height:1.5}
    .hero-side{padding:24px;display:flex;flex-direction:column;gap:14px}
    .mini-title{font-size:1.05rem;margin:0 0 4px}
    .mini-desc{margin:0;color:var(--muted);line-height:1.7;font-size:.95rem}
    .chip-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
    .chip{padding:8px 12px;border-radius:999px;background:#f7f9ff;border:1px solid var(--line);font-size:.88rem;color:#334155}
    .section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:24px}
    .section-head h2{margin:0;font-size:clamp(1.5rem,2.5vw,2.3rem)}
    .section-head p{margin:0;color:var(--muted);max-width:60ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .card{padding:22px}
    .card h3{margin:14px 0 10px;font-size:1.1rem}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(59,130,246,.14), rgba(124,58,237,.14));
      color:var(--brand-2);font-weight:800
    }
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .stat{padding:20px;background:#fff;border:1px solid var(--line);border-radius:20px}
    .stat strong{display:block;font-size:1.7rem}
    .stat span{display:block;color:var(--muted);line-height:1.5;margin-top:8px}
    .compare-wrap{overflow:auto;border-radius:22px}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f7fd;color:#122033;font-size:.95rem}
    td{color:#314055;line-height:1.65}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#ecfdf5;color:#047857;font-size:.82rem;font-weight:700}
    .badge.warn{background:#fff7ed;color:#c2410c}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-item{padding:20px;position:relative}
    .timeline-item strong{display:block;font-size:1rem;margin-bottom:8px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;text-align:left;border:0;background:#fff;padding:18px 20px;
      font-size:1rem;font-weight:700;color:var(--text);display:flex;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease, padding .28s ease; padding:0 20px}
    .faq-item.open .faq-a{max-height:240px;padding:0 20px 18px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.75}
    .reviews,.articles,.price-grid,.network-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review-card,.article-card,.price-card,.network-card{padding:22px}
    .stars{color:#f59e0b;letter-spacing:2px;font-size:1rem}
    .review-card p{color:var(--muted);line-height:1.75}
    .article-card time{color:var(--muted);font-size:.88rem}
    .article-card h3{margin:10px 0 8px;font-size:1.05rem}
    .article-card a{font-weight:700}
    .price-card .price{font-size:1.85rem;font-weight:800;color:var(--brand-2);margin:10px 0}
    .form-box{padding:24px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:.92rem;font-weight:700;color:#223047}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    textarea{min-height:130px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(59,130,246,.7);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
    .footer{
      background:#eaf1fb;color:#183048;border-top:1px solid rgba(219,227,239,.95);
      padding:34px 0 22px;margin-top:6px
    }
    .footer a{color:#173b77}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer p,.footer li{color:#3d5269;line-height:1.8}
    .footer ul{padding:0;margin:0;list-style:none}
    .footer .copyright{margin-top:18px;padding-top:18px;border-top:1px solid rgba(219,227,239,.85);color:#52657b;font-size:.92rem}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .floating a,.floating button{
      border:0;border-radius:999px;box-shadow:0 12px 26px rgba(15,23,42,.14);cursor:pointer
    }
    .floating .mini{
      background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;padding:12px 16px;font-weight:700
    }
    .floating .top{
      width:46px;height:46px;background:#fff;color:var(--text);border:1px solid var(--line)
    }
    .floating-contact{
      position:fixed;left:16px;bottom:16px;z-index:60;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow);max-width:260px
    }
    .floating-contact img{width:100%;border-radius:14px;margin-top:10px}
    .scroll-reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .scroll-reveal.show{opacity:1; transform:none}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#314055;font-size:.88rem}
    .muted{color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.stats,.timeline,.reviews,.articles,.price-grid,.network-grid,.footer-grid{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-toggle{display:inline-flex}
      .nav{display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}
      .nav.open{display:flex}
      .form-grid{grid-template-columns:1fr}
      .floating-contact{display:none}
    }