* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "Microsoft YaHei", sans-serif;
  background: #0f1923;
  color: #e0e0e0;
  min-height: 100vh;
}
.header {
  text-align: center;
  padding: 40px 20px 20px;
}
.header h1 { font-size: 28px; color: #fff; letter-spacing: 2px; }
.header p { color: #888; margin-top: 8px; font-size: 14px; }
.search-box {
  max-width: 500px;
  margin: 20px auto 0;
  position: relative;
}
.search-box input {
  width: 100%;
  padding: 12px 20px;
  border-radius: 25px;
  border: 1px solid #2a3a4a;
  background: #1a2733;
  color: #e0e0e0;
  font-size: 15px;
  outline: none;
  transition: border .3s;
}
.search-box input:focus { border-color: #4a9eff; }
.search-box input::placeholder { color: #555; }
#category-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}
.cat-btn {
  padding: 6px 18px;
  border-radius: 20px;
  border: 1px solid #2a3a4a;
  background: transparent;
  color: #aaa;
  cursor: pointer;
  font-size: 14px;
  transition: all .3s;
}
.cat-btn:hover { border-color: #4a9eff; color: #4a9eff; }
.cat-btn.active { background: #4a9eff; color: #fff; border-color: #4a9eff; }
#station-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px 40px;
}
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  border-radius: 12px;
  background: #1a2733;
  border: 1px solid #2a3a4a;
  text-decoration: none;
  color: #e0e0e0;
  transition: all .3s;
  cursor: pointer;
}
.card:hover { transform: translateY(-4px); border-color: #4a9eff; box-shadow: 0 8px 20px rgba(74,158,255,.15); }
.card-icon { font-size: 36px; margin-bottom: 10px; }
.card-name { font-size: 16px; font-weight: 600; color: #fff; }
.card-desc { font-size: 12px; color: #888; margin-top: 6px; text-align: center; }
.card-tags { display: flex; flex-wrap: wrap; gap: 4px; justify-content: center; margin-top: 10px; }
.tag {
  font-size: 11px;
  color: #4a9eff;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(74,158,255,.1);
}
.ad-slot {
  grid-column: 1 / -1;
  text-align: center;
  padding: 20px;
  border: 1px dashed #2a3a4a;
  border-radius: 8px;
  color: #555;
  font-size: 14px;
  background: #15202b;
}
.ad-top {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}
.ad-top .ad-slot { margin-bottom: 10px; }
.empty { grid-column: 1 / -1; text-align: center; padding: 60px; color: #555; }
.footer {
  text-align: center;
  padding: 30px;
  color: #444;
  font-size: 12px;
}
.footer-links a, .footer-contact a { color: #4a9eff; text-decoration: none; }
.footer-links a:hover, .footer-contact a:hover { text-decoration: underline; }
.footer-contact { margin-top: 10px; color: #666; font-size: 13px; }
.footer-contact a { font-weight: 600; }
@media (max-width: 500px) {
  #station-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card { padding: 16px 10px; }
}