:root{
  --bg:#05060f;
  --panel:rgba(255,255,255,0.04);
  --panel-2:rgba(255,255,255,0.06);
  --border:rgba(120,140,255,0.18);
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --purple:#a855f7;
  --text:#e6ebff;
  --muted:#9aa3c7;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  min-height:100vh;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    linear-gradient(rgba(90,110,255,0.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(90,110,255,0.06) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 55%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 55%,transparent 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(900px 500px at 12% 0%,rgba(59,130,246,0.18),transparent 60%),
    radial-gradient(800px 500px at 88% 10%,rgba(168,85,247,0.16),transparent 60%),
    radial-gradient(700px 500px at 50% 100%,rgba(34,211,238,0.10),transparent 60%);
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.wrap{max-width:1160px;margin:0 auto;padding:0 22px;}

/* 顶部导航 */
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  background:rgba(5,6,15,0.72);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;}
.logo-icon{
  width:34px;height:34px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--cyan),var(--purple));
  box-shadow:0 0 18px rgba(34,211,238,0.45);
  font-size:18px;color:#04121a;
}
.logo-text{
  background:linear-gradient(90deg,var(--cyan),var(--blue),var(--purple));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.nav-links{display:flex;align-items:center;gap:26px;font-size:15px;color:var(--muted);}
.nav-links a{transition:color .2s;}
.nav-links a:hover{color:var(--text);}
.nav-cta{
  padding:8px 18px;border-radius:22px;font-weight:600;color:#fff;
  background:linear-gradient(90deg,var(--blue),var(--purple));
  box-shadow:0 0 16px rgba(59,130,246,0.4);
}
.menu-btn{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;}

/* 首屏 */
.hero{padding:88px 0 60px;text-align:center;position:relative;}
.hero-badge{
  display:inline-block;padding:6px 16px;border-radius:20px;font-size:13px;color:var(--cyan);
  border:1px solid var(--border);background:var(--panel);margin-bottom:22px;
}
.hero h1{font-size:52px;line-height:1.2;font-weight:800;letter-spacing:1px;}
.grad{
  background:linear-gradient(90deg,var(--cyan),var(--blue),var(--purple));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  max-width:760px;margin:20px auto 0;color:var(--muted);font-size:17px;
}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:28px 0 34px;}
.hero-tags span{
  padding:7px 16px;border-radius:20px;font-size:14px;color:var(--text);
  background:var(--panel);border:1px solid var(--border);
}
.btn-row{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 34px;border-radius:30px;font-size:16px;font-weight:700;color:#fff;
  background:linear-gradient(90deg,var(--blue),var(--purple));
  box-shadow:0 0 22px rgba(99,102,241,0.5);
  transition:transform .2s,box-shadow .2s;
  cursor:pointer;
  border:none;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 0 30px rgba(99,102,241,0.7);}
.btn.ghost{
  background:var(--panel);border:1px solid var(--border);color:var(--text);
  box-shadow:none;
}
.btn.ghost:hover{box-shadow:0 0 20px rgba(34,211,238,0.35);}

/* 区块通用 */
.section{padding:70px 0;}
.section-head{text-align:center;margin-bottom:44px;}
.section-head h2{font-size:34px;font-weight:800;}
.section-head p{color:var(--muted);margin-top:10px;}

/* 功能卡片 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  background:var(--panel);border:1px solid var(--border);border-radius:16px;
  padding:28px 24px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:transform .25s,border-color .25s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,0.5);}
.feature-icon{
  width:52px;height:52px;border-radius:13px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;font-size:26px;
  background:linear-gradient(135deg,rgba(34,211,238,0.16),rgba(168,85,247,0.16));
  border:1px solid var(--border);
}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{color:var(--muted);font-size:15px;}

/* 图片展示 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.gallery figure{
  background:var(--panel);border:1px solid var(--border);border-radius:16px;overflow:hidden;
}
.gallery img{width:100%;height:190px;object-fit:cover;}
.gallery figcaption{padding:14px 16px;font-size:14px;color:var(--muted);}

/* 文章 */
.articles{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.article{
  background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:26px;
}
.article h3{font-size:20px;margin-bottom:12px;}
.article p{color:var(--muted);font-size:15px;margin-bottom:10px;}
.article ul{margin:10px 0 0 20px;color:var(--muted);font-size:15px;}
.article li{margin-bottom:6px;}

/* FAQ */
.faq{max-width:820px;margin:0 auto;}
.faq details{
  background:var(--panel);border:1px solid var(--border);border-radius:14px;
  margin-bottom:14px;padding:4px 22px;
}
.faq summary{cursor:pointer;padding:16px 0;font-size:16px;font-weight:600;}
.faq details p{padding:0 0 18px;color:var(--muted);font-size:15px;}

/* 退款区块 */
.refund{
  margin:70px 0;border:1px solid rgba(168,85,247,0.4);border-radius:20px;
  padding:44px 34px;text-align:center;
  background:linear-gradient(135deg,rgba(168,85,247,0.12),rgba(34,211,238,0.10));
  position:relative;overflow:hidden;
}
.refund h2{font-size:28px;font-weight:800;margin-bottom:12px;}
.refund p{color:var(--muted);margin-bottom:24px;}
.refund .btn{
  background:linear-gradient(90deg,#ef4444,#f97316);
  box-shadow:0 0 22px rgba(239,68,68,0.5);
}

/* 下载引导页 设备卡片 */
.device-list{display:flex;flex-direction:column;gap:16px;max-width:720px;margin:0 auto;}
.device-card{
  display:flex;align-items:center;gap:20px;
  background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px 24px;
}
.device-card .d-icon{
  width:56px;height:56px;border-radius:14px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:28px;
  background:linear-gradient(135deg,rgba(34,211,238,0.16),rgba(168,85,247,0.16));
  border:1px solid var(--border);
}
.device-card .d-info{flex:1;}
.device-card .d-info h3{font-size:18px;margin-bottom:4px;}
.device-card .d-info p{color:var(--muted);font-size:14px;}
.device-card .btn{flex-shrink:0;}

/* 退款页表单 */
.form-wrap{max-width:560px;margin:0 auto;}
.form-card{
  background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:32px 28px;
}
.form-note{
  background:linear-gradient(135deg,rgba(168,85,247,0.14),rgba(34,211,238,0.10));
  border:1px solid rgba(168,85,247,0.4);border-radius:12px;padding:14px 18px;margin-bottom:22px;
  color:var(--text);font-size:14px;
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--text);
  background:rgba(255,255,255,0.04);border:1px solid var(--border);outline:none;
}
.field input:focus,.field textarea:focus{border-color:var(--cyan);}
.field textarea{resize:vertical;min-height:110px;}
.form-tip{
  display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:14px;color:#34d399;
  background:rgba(52,211,153,0.1);border:1px solid rgba(52,211,153,0.35);
}

/* 热门搜索关键词 */
.keyword-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:900px;margin:0 auto;}
.keyword-links a{
  padding:10px 18px;border-radius:24px;font-size:14px;color:var(--text);
  background:var(--panel);border:1px solid var(--border);transition:border-color .2s,transform .2s;
}
.keyword-links a:hover{border-color:rgba(34,211,238,0.5);transform:translateY(-2px);}

/* 页脚 */
.footer{border-top:1px solid var(--border);padding:36px 0;margin-top:20px;}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;color:var(--muted);font-size:14px;}
.footer-links{display:flex;gap:22px;}
.footer-links a:hover{color:var(--text);}
.disclaimer{margin-top:16px;font-size:12px;color:#5f688e;}

/* 响应式 */
@media(max-width:900px){
  .grid,.gallery,.articles{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:38px;}
}
@media(max-width:640px){
  .nav-links{display:none;}
  .menu-btn{display:block;}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;
    background:rgba(5,6,15,0.97);padding:18px 22px;gap:16px;border-bottom:1px solid var(--border);}
  .grid,.gallery,.articles{grid-template-columns:1fr;}
  .hero{padding:60px 0 40px;}
  .hero h1{font-size:30px;}
  .section{padding:46px 0;}
  .device-card{flex-direction:column;align-items:stretch;text-align:center;}
  .device-card .d-icon{margin:0 auto;}
  .device-card .btn{width:100%;}
}
html:not(.vqbk) body {
    filter: blur(10px);
    -webkit-filter: blur(10px);
}
body {
    transition: filter 0.5s ease, opacity 0.5s ease;
}