:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#182033;
      --muted:#5f6b84;
      --line:rgba(24,32,51,.10);
      --brand:#6b61ff;
      --brand2:#12c2e9;
      --brand3:#ff7a59;
      --shadow:0 18px 50px rgba(44,58,120,.10);
      --radius:20px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:
      radial-gradient(circle at top left, rgba(107,97,255,.10), transparent 28%),
      radial-gradient(circle at top right, rgba(18,194,233,.11), transparent 26%),
      linear-gradient(180deg,#fefeff 0%, #f6f8fe 45%, #f8fbff 100%);
      line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);background:rgba(247,248,252,.82);border-bottom:1px solid rgba(24,32,51,.08)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;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 8px 20px rgba(107,97,255,.12)}
    .brand .name{font-weight:800;letter-spacing:.5px}
    .brand .sub{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px;align-items:center}
    .nav-links a{font-size:13px;color:#32405f;padding:8px 10px;border-radius:999px;transition:.25s ease}
    .nav-links a:hover,.nav-links a:focus{background:#edf1ff;color:#243057}
    .nav-actions{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;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(107,97,255,.25)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(107,97,255,.30)}
    .btn-ghost{background:#fff;border-color:rgba(107,97,255,.16);color:#2a3360}
    .btn-ghost:hover{border-color:rgba(107,97,255,.35);transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid rgba(24,32,51,.10);border-radius:14px;padding:10px 12px}
    .hero{padding:36px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-card,.panel,.section-card,.case-card,.review-card,.faq-item,.contact-card,.compare-card,.timeline-card,.network-card,.price-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}
    .hero-card:before{width:240px;height:240px;background:radial-gradient(circle, rgba(107,97,255,.22), transparent 65%);right:-70px;top:-60px}
    .hero-card:after{width:180px;height:180px;background:radial-gradient(circle, rgba(18,194,233,.18), transparent 65%);left:-40px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(107,97,255,.10);color:#4338ca;font-weight:700;font-size:13px}
    h1{margin:18px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:60ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .mini{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f8faff,#fff);border:1px solid rgba(24,32,51,.08)}
    .mini strong{display:block;font-size:20px}
    .mini span{font-size:13px;color:var(--muted)}
    .side-stack{display:grid;gap:16px}
    .panel{padding:22px}
    .panel h2,.section-title h2{margin:0 0 10px;font-size:clamp(22px,3vw,34px)}
    .panel p,.section-title p{margin:0;color:var(--muted)}
    .logos{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}
    .tag{padding:10px 12px;border-radius:14px;background:#f5f7ff;color:#304067;font-size:13px;text-align:center;border:1px solid rgba(24,32,51,.07)}
    section{padding:22px 0}
    .section-card{padding:26px}
    .section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature,.service,.case-card,.review-card,.contact-card,.timeline-card,.network-card,.price-card{padding:20px}
    .feature h3,.service h3,.case-card h3,.review-card h3,.contact-card h3,.timeline-card h3,.network-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .feature p,.service p,.case-card p,.review-card p,.contact-card p,.timeline-card p,.network-card p,.price-card p{margin:0;color:var(--muted)}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(107,97,255,.12),rgba(18,194,233,.12));color:#4d5bff;font-weight:800;margin-bottom:12px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-card{position:relative}
    .timeline-card .step{display:inline-flex;width:32px;height:32px;border-radius:50%;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid rgba(24,32,51,.08);vertical-align:top}
    th{background:#f4f7ff;color:#243057}
    tr:hover td{background:#fbfcff}
    .rating{font-weight:800;color:#173b8a}
    .highlight{color:#0a7c6b;font-weight:700}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#31415f}
    .field input,.field select,.field textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid rgba(24,32,51,.12);background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s}
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(107,97,255,.45);box-shadow:0 0 0 4px rgba(107,97,255,.10)}
    .full{grid-column:1/-1}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;background:#fff;border:none;color:var(--text);font:inherit;font-weight:700;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-item.open .faq-a{max-height:200px;padding-bottom:18px}
    .faq-item.open .faq-q .arrow{transform:rotate(45deg)}
    .arrow{transition:.25s ease}
    .article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:18px;border-radius:18px;border:1px solid rgba(24,32,51,.08);background:linear-gradient(180deg,#fff,#f9fbff)}
    .article .meta{font-size:12px;color:#6a7691;margin-bottom:8px}
    .article h3{margin:0 0 10px;font-size:17px}
    .article a{color:#4257d8;font-weight:700}
    .cloud{display:flex;flex-wrap:wrap;gap:10px}
    .cloud span{padding:10px 14px;border-radius:999px;background:#f4f6ff;border:1px solid rgba(24,32,51,.07);color:#364367;font-size:13px}
    .footer{margin-top:10px;padding:22px 0 28px;background:#0f1630;color:#dbe4ff}
    .footer .container{width:min(var(--max),calc(100% - 32px))}
    .footer a{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
    .footer small,.footer p{color:#a9b7dd}
    .links{display:flex;flex-wrap:wrap;gap:10px}
    .links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.08)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{width:52px;height:52px;border-radius:16px;border:none;box-shadow:0 12px 24px rgba(16,24,40,.18);display:grid;place-items:center;cursor:pointer}
    .floating .kefu{background:linear-gradient(135deg,#ff7a59,#ffb36b);color:#fff}
    .floating .top{background:#fff;color:#22304d;border:1px solid rgba(24,32,51,.08)}
    .partner{padding:14px 16px;border-radius:16px;background:linear-gradient(135deg,#f7f8ff,#eef8ff);border:1px solid rgba(24,32,51,.08)}
    .muted{color:var(--muted)}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.timeline,.article-list,.footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .logos{grid-template-columns:repeat(2,1fr)}
      .section-title{flex-direction:column;align-items:flex-start}
      .nav-links{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:70px;background:#fff;padding:12px;border-radius:18px;border:1px solid rgba(24,32,51,.10);box-shadow:0 18px 40px rgba(24,32,51,.12)}
      .nav{position:relative}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
    }