:root{
  --bg: #0b0f1a;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.1);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --muted2: rgba(255,255,255,.55);
  --line: rgba(255,255,255,.12);
  --brand: #7c4dff;
  --brand2: #39d0ff;
  --shadow: 0 20px 70px rgba(0,0,0,.45);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  /* 全站背景使用统一渐变，避免底部色块突兀 */
  background: linear-gradient(180deg, #0b0f1a 0%, #090d16 55%, #070a12 100%);
}

a{ color:inherit; text-decoration:none; }
a:hover{ text-decoration: underline; }

.wrap{
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 18px 40px;
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(10,14,24,.55);
  backdrop-filter: blur(10px);
  border-radius: 16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight: 700;
  letter-spacing: .2px;
}
.brand-logo{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  box-shadow: 0 10px 30px rgba(124,77,255,.18);
  object-fit: cover;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}
.nav-link{
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 10px;
}
.nav-link.active{
  color: var(--text);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
}

.hero{
  margin-top: 18px;
  padding: 26px 18px 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  box-shadow: var(--shadow);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.4fr .9fr;
  gap: 18px;
  align-items: stretch;
}

.title{
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 12px;
}
.subtitle{
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 16px;
}
.pill-row{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
}
.pill{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.qr-card{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: 18px;
  padding: 14px;
  display:flex;
  flex-direction: column;
  gap: 10px;
  justify-content: space-between;
}
.qr-title{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}
.qr-title h3{
  margin:0;
  font-size: 14px;
  color: var(--text);
  font-weight: 650;
}
.qr-title span{
  font-size: 12px;
  color: var(--muted2);
}
.qr-img{
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
}
.qr-hint{
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.section{
  margin-top: 16px;
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
.card{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: 16px;
  padding: 14px;
}
.card h4{
  margin:0 0 6px;
  font-size: 14px;
}
.card p{
  margin:0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.about{
  margin-top: 18px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  box-shadow: var(--shadow);
}
.about h2{
  margin:0 0 10px;
  font-size: 20px;
}
.kv{
  display:grid;
  grid-template-columns: 120px 1fr;
  gap: 10px 14px;
  padding-top: 6px;
}
.k{
  color: var(--muted2);
  font-size: 13px;
}
.v{
  color: var(--text);
  font-size: 13px;
}

.footer{
  margin-top: 18px;
  padding: 16px 4px 0;
  color: var(--muted2);
  text-align:center;
  font-size: 12px;
  line-height: 1.7;
}

.beian-row{
  margin-top: 8px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  flex-wrap: wrap;
}
.beian-icon{
  width: 18px;
  height: 18px;
  display:block;
}
.beian-link{
  color: var(--muted2);
}

@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
  .section{ grid-template-columns: 1fr; }
  .title{ font-size: 30px; }
  .kv{ grid-template-columns: 1fr; }
}