:root{
      --bg:#f4f7fb;
      --bg2:#eef5ff;
      --card:#ffffff;
      --text:#1d2939;
      --muted:#5b6472;
      --line:#dbe6f2;
      --primary:#316dff;
      --primary2:#7a5cff;
      --accent:#ff7a59;
      --good:#0f9d58;
      --shadow:0 18px 50px rgba(26, 54, 93, .10);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC","Microsoft YaHei", "Noto Sans SC", sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 500px at 10% 0%, rgba(49,109,255,.10), transparent 60%),
        radial-gradient(900px 420px at 100% 10%, rgba(122,92,255,.10), transparent 55%),
        linear-gradient(180deg, #f8fbff 0%, #f4f7fb 36%, #f8fbff 100%);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(16px);
      background: rgba(248,251,255,.82);
      border-bottom:1px solid rgba(219,230,242,.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 .logo{
      width:46px;height:46px; border-radius:14px; background:#fff; padding:6px; box-shadow:var(--shadow);
      object-fit:contain;
    }
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:1.05rem; letter-spacing:.5px}
    .brand-text span{display:block; font-size:.88rem; color:var(--muted)}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; padding:10px 12px; box-shadow:0 10px 24px rgba(26,54,93,.06);
    }
    .nav-links{
      display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end;
    }
    .nav-links a{
      font-size:.95rem; color:#334155; padding:8px 10px; border-radius:10px; transition:.2s ease;
    }
    .nav-links a:hover{background:rgba(49,109,255,.08); color:var(--primary)}
    .cta{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      background:linear-gradient(135deg, var(--primary), var(--primary2));
      color:#fff; border:none; padding:12px 18px; border-radius:999px;
      box-shadow:0 16px 34px rgba(49,109,255,.25);
      transition:transform .2s ease, box-shadow .2s ease;
      font-weight:700;
    }
    .cta:hover{transform:translateY(-1px); box-shadow:0 20px 40px rgba(49,109,255,.3)}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid; grid-template-columns: 1.2fr .8fr; gap:22px; align-items:stretch;
    }
    .hero-main, .hero-side, .panel, .section-card, .faq-item, .review-card, .case-card, .article-card, .price-card, .timeline-item, .network-card, .compare-card, .tag-cloud, .contact-card{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(219,230,242,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{
      padding:30px; position:relative; overflow:hidden;
      background:
        linear-gradient(135deg, rgba(255,255,255,.92), rgba(245,249,255,.86)),
        radial-gradient(circle at 20% 20%, rgba(49,109,255,.10), transparent 24%),
        radial-gradient(circle at 80% 0%, rgba(255,122,89,.08), transparent 22%);
    }
    .hero-main::after{
      content:""; position:absolute; inset:auto -40px -50px auto; width:180px; height:180px;
      background:linear-gradient(135deg, rgba(49,109,255,.16), rgba(122,92,255,.16));
      border-radius:50%; filter:blur(2px);
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 12px; border-radius:999px;
      background:rgba(49,109,255,.08); color:var(--primary); font-weight:700; font-size:.88rem;
    }
    h1{margin:16px 0 12px; font-size:clamp(2rem, 4vw, 3.6rem); line-height:1.08; letter-spacing:-.04em}
    .hero-main p{margin:0; color:var(--muted); font-size:1.02rem; max-width:64ch}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:24px}
    .ghost{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:999px; border:1px solid var(--line); background:#fff; color:var(--text);
      transition:.2s ease;
    }
    .ghost:hover{border-color:rgba(49,109,255,.35); color:var(--primary); transform:translateY(-1px)}
    .hero-stats{
      display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px
    }
    .stat{background:rgba(255,255,255,.86); border:1px solid rgba(219,230,242,.9); border-radius:18px; padding:16px}
    .stat b{display:block; font-size:1.3rem; margin-bottom:4px}
    .stat span{color:var(--muted); font-size:.9rem}
    .hero-side{padding:22px; display:grid; gap:14px}
    .mini{
      padding:18px; border-radius:18px; background:linear-gradient(180deg, #fff, #f8fbff);
      border:1px solid var(--line)
    }
    .mini h3{margin:0 0 8px; font-size:1.02rem}
    .mini p{margin:0; color:var(--muted); font-size:.94rem}
    .mini strong{color:var(--text)}
    .section{padding:14px 0 26px}
    .section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:18px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:1.55rem}
    .section-head p{margin:0; color:var(--muted)}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .panel, .section-card{padding:20px}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(49,109,255,.12), rgba(122,92,255,.12)); color:var(--primary); font-weight:800;
      margin-bottom:12px;
    }
    .card-title{margin:0 0 8px; font-size:1.05rem}
    .card-text{margin:0; color:var(--muted); font-size:.95rem}
    .list{
      margin:0; padding-left:18px; color:var(--muted)
    }
    .list li{margin:6px 0}
    .flow{
      display:grid; grid-template-columns:repeat(5,1fr); gap:12px
    }
    .step{padding:18px; position:relative}
    .step .num{
      width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg, var(--primary), var(--primary2)); color:#fff; font-weight:700; margin-bottom:10px;
    }
    .compare-wrap{overflow:auto; border-radius:18px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f7faff; font-size:.95rem}
    .badge{
      display:inline-flex; align-items:center; gap:6px; padding:6px 10px; border-radius:999px;
      background:rgba(15,157,88,.08); color:var(--good); font-size:.85rem; font-weight:700
    }
    .tag-cloud{padding:18px}
    .tags{display:flex; flex-wrap:wrap; gap:10px}
    .tag{
      padding:9px 12px; border-radius:999px; background:#f7faff; border:1px solid var(--line); color:#334155; font-size:.92rem;
    }
    .price-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .price-card{padding:20px}
    .price{
      font-size:1.8rem; font-weight:800; margin:8px 0 10px;
      background:linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip:text; background-clip:text; color:transparent;
    }
    .timeline{display:grid; gap:12px}
    .timeline-item{padding:18px; display:flex; gap:14px; align-items:flex-start}
    .timeline-dot{width:12px;height:12px;border-radius:50%; margin-top:6px; background:linear-gradient(135deg, var(--primary), var(--accent)); flex:none}
    .network-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .network-card{padding:20px}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .review-card{padding:20px}
    .stars{color:#ffb400; letter-spacing:2px; font-size:1rem; margin-bottom:10px}
    .case-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .case-card{padding:20px}
    .article-list{display:grid; gap:12px}
    .article-card{padding:16px 18px; display:flex; justify-content:space-between; gap:16px; align-items:center}
    .article-card strong{display:block; margin-bottom:4px}
    .article-card span{color:var(--muted); font-size:.92rem}
    .qa{display:grid; gap:10px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; display:flex; justify-content:space-between; align-items:center; gap:12px;
      padding:16px 18px; background:transparent; border:none; color:var(--text); text-align:left; font-size:1rem; font-weight:700; cursor:pointer;
    }
    .faq-a{padding:0 18px 16px; color:var(--muted); display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:transform .2s ease}
    .form-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:14px}
    form{display:grid; gap:12px}
    .field{display:grid; gap:8px}
    .field label{font-weight:700; font-size:.95rem}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:12px 14px; outline:none; font:inherit;
    }
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(49,109,255,.45); box-shadow:0 0 0 4px rgba(49,109,255,.08)}
    .field textarea{min-height:120px; resize:vertical}
    .contact-card{padding:20px}
    .contact-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .qr{
      border:1px solid var(--line); border-radius:18px; padding:14px; background:#fff; text-align:center
    }
    .qr img{width:160px; height:auto; margin:0 auto 10px; border-radius:12px}
    .footer{
      margin-top:8px; padding:24px 0 30px; border-top:1px solid rgba(219,230,242,.85);
      background:linear-gradient(180deg, rgba(255,255,255,.65), rgba(245,248,252,.9));
      color:var(--text);
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr .8fr; gap:18px}
    .footer a{color:#244a9e}
    .footer small, .footer p{color:var(--muted)}
    .float{
      position:fixed; right:16px; bottom:18px; z-index:60; display:grid; gap:10px
    }
    .float a, .to-top{
      width:50px; height:50px; border-radius:50%; display:grid; place-items:center; border:none; cursor:pointer;
      background:linear-gradient(135deg, var(--primary), var(--primary2)); color:#fff; box-shadow:0 14px 30px rgba(49,109,255,.26);
      transition:transform .2s ease;
    }
    .float a:hover, .to-top:hover{transform:translateY(-2px)}
    .to-top{opacity:0; pointer-events:none}
    .to-top.show{opacity:1; pointer-events:auto}
    .section-reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease}
    .section-reveal.visible{opacity:1; transform:none}
    .muted{color:var(--muted)}
    .inline-links{display:flex; flex-wrap:wrap; gap:10px}
    .inline-links a{
      padding:8px 11px; border-radius:999px; border:1px solid var(--line); background:#fff; color:#35507a; font-size:.92rem;
    }
    .mobile-only{display:none}
    @media (max-width: 1080px){
      .hero-grid,.grid-4,.grid-3,.price-grid,.reviews,.case-grid,.network-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
      .flow{grid-template-columns:1fr 1fr}
      .hero-stats{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:0; right:0; top:100%;
        background:rgba(248,251,255,.98); border-bottom:1px solid var(--line);
        padding:14px 16px 18px; flex-direction:column; align-items:stretch; gap:6px;
      }
      .nav-links.open{display:flex}
      .nav{position:relative}
      .nav-links a{padding:12px 10px; background:#fff; border:1px solid var(--line)}
      .desktop-only{display:none}
      .mobile-only{display:inline-flex}
    }
    @media (max-width: 720px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .hero-main,.hero-side,.panel,.section-card,.price-card,.case-card,.review-card,.article-card,.network-card,.contact-card{padding:16px}
      .hero-main{padding:22px}
      h1{font-size:1.95rem}
      .flow{grid-template-columns:1fr}
      .hero-actions{flex-direction:column}
      .cta,.ghost{width:100%}
      .section-head{flex-direction:column; align-items:flex-start}
      .article-card{flex-direction:column; align-items:flex-start}
      .contact-grid{grid-template-columns:1fr}
    }