:root{
      --bg:#0f0818;
      --bg2:#160d24;
      --panel:#1d132e;
      --panel2:#241735;
      --text:#f4ecff;
      --muted:#d4c3ea;
      --line:rgba(255,255,255,.1);
      --accent:#ff4fd8;
      --accent2:#7c5cff;
      --accent3:#24d7ff;
      --warm:#ffd36a;
      --shadow:0 20px 60px rgba(0,0,0,.35);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      background:
        radial-gradient(circle at 15% 10%, rgba(255,79,216,.18), transparent 24%),
        radial-gradient(circle at 80% 0%, rgba(36,215,255,.12), transparent 22%),
        linear-gradient(180deg, #110815 0%, #0b0712 100%);
      color:var(--text);
      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}
    header{position:sticky;top:0;z-index:60;background:rgba(12,7,18,.72);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.08)}
    .topbar{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:44px;height:44px;object-fit:contain;border-radius:12px;background:rgba(255,255,255,.06);padding:6px}
    .brand strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:var(--text);border-radius:12px;padding:10px 12px}
    nav ul{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0;align-items:center;justify-content:flex-end}
    nav a{display:inline-flex;align-items:center;padding:8px 10px;border-radius:999px;color:var(--muted);font-size:14px}
    nav a:hover,nav a.active{background:rgba(255,255,255,.08);color:#fff}
    .hero{padding:42px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel,.faq-item,.review,.article,.step,.metric,.compare,.form-wrap,.timeline,.network,.pricing,.tagcloud,.table-wrap,.section-title{
      background:linear-gradient(180deg, rgba(37,24,56,.92), rgba(24,15,37,.92));
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::after{
      content:"";position:absolute;inset:auto -20% -30% auto;width:320px;height:320px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,79,216,.22), transparent 65%);filter:blur(6px);pointer-events:none
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.08);color:#ffdff8;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08}
    .lead{font-size:16px;color:var(--muted);max-width:58ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 12px 32px rgba(255,79,216,.24)}
    .btn-secondary{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#fff}
    .btn:hover,.card:hover,.review:hover,.article:hover,.step:hover,.metric:hover,.compare:hover,.faq-item:hover{transform:translateY(-3px)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-stat{padding:16px;border-radius:16px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09)}
    .mini-stat b{display:block;font-size:22px;color:#fff}
    .mini-stat span{color:var(--muted);font-size:13px}
    .section{padding:18px 0 10px}
    .section-title{padding:22px 24px;margin-bottom:16px}
    .section-title h2{margin:0 0 8px;font-size:28px}
    .section-title p{margin:0;color:var(--muted)}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .metric,.card,.review,.article,.step,.compare,.faq-item,.form-wrap,.panel,.pricing,.network,.timeline,.tagcloud{padding:20px}
    .metric b,.card h3,.step h3,.compare h3,.review strong,.article h3{display:block;margin-bottom:10px;font-size:18px}
    .muted{color:var(--muted)}
    .pill-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .pill{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.08);font-size:13px;color:#f8ecff}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid rgba(255,255,255,.08);text-align:left;color:var(--muted)}
    th{color:#fff;background:rgba(255,255,255,.05)}
    .faq-item summary{cursor:pointer;font-weight:700;list-style:none}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{margin:12px 0 0;color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.06);color:#fff;outline:none
    }
    textarea{min-height:120px;resize:vertical}
    label{display:block;font-size:13px;color:#eedfff;margin:0 0 8px}
    .full{grid-column:1/-1}
    .footer{padding:22px 0 90px;color:var(--muted)}
    .footer-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
    .footer a{color:#ffd8f3}
    .fixed-contact{
      position:fixed;right:16px;bottom:16px;z-index:70;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:var(--shadow);border:none
    }
    .backtop{position:fixed;right:16px;bottom:80px;z-index:70;opacity:0;pointer-events:none;transition:.25s}
    .backtop.show{opacity:1;pointer-events:auto}
    .backtop .float-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16)}
    .reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    .cover-img{border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.1)}
    .cover-img img{width:100%;height:auto}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.split,.footer-inner,.article-list{grid-template-columns:1fr}
      .topbar{flex-wrap:wrap}
      nav{width:100%}
      nav ul{display:none;flex-direction:column;align-items:stretch;padding:10px 0 0}
      nav ul.open{display:flex}
      .nav-toggle{display:inline-flex}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .hero-main{padding:24px}
      .section-title h2{font-size:24px}
      .container{width:min(var(--container), calc(100% - 22px))}
      .cta-row .btn{width:100%}
    }