:root {
  --bg: #0f1216;
  --panel: #161b22;
  --text: #e6edf3;
  --subtext: #a1a7b3;
  --primary: #6ea8fe;
  --primary-700: #4c85da;
  --border: #252a33;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Noto Sans SC", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.site-header {
  background: linear-gradient(180deg, rgba(78,133,218,0.25), rgba(78,133,218,0));
  border-bottom: 1px solid var(--border);
}
.site-title { margin: 0; padding-top: 22px; font-size: 28px; font-weight: 700; }
.site-subtitle { margin: 6px 0 20px; color: var(--subtext); }

.toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0 10px;
}
.filters { display: flex; gap: 8px; }
.filter-btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.filter-btn:hover { border-color: var(--primary); }
.filter-btn.active { background: #1b2130; border-color: var(--primary-700); }

.search { margin-left: auto; }
.search input {
  width: 280px;
  max-width: 50vw;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
}
.search input::placeholder { color: var(--subtext); }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  padding: 12px 0 40px;
}

.card {
  background: #11151b;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.media-box { position: relative; aspect-ratio: 4 / 3; background: #0b0e12; }
.media-box img, .media-box video {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.badge {
  position: absolute; left: 10px; top: 10px;
  font-size: 12px; padding: 4px 8px; border-radius: 999px;
  background: rgba(110,168,254,0.2); color: var(--text); border: 1px solid var(--primary-700);
}
.card-body { padding: 10px 12px; display: flex; align-items: center; justify-content: space-between; }
.title { font-size: 14px; color: var(--text); }
.category { font-size: 12px; color: var(--subtext); }
.open-btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 6px 10px; border-radius: 8px; cursor: pointer;
}
.open-btn:hover { border-color: var(--primary); }

.lightbox {
  position: fixed; inset: 0; background: rgba(2,5,10,0.8);
  display: none; align-items: center; justify-content: center;
}
.lightbox[aria-hidden="false"] { display: flex; }
.lightbox-content { width: min(92vw, 980px); }
.lightbox-caption { color: var(--subtext); margin-top: 8px; }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; top: 14px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text); width: 40px; height: 40px; border-radius: 10px;
  cursor: pointer; display: grid; place-items: center;
}
.lightbox-close { right: 14px; font-size: 20px; }
.lightbox-prev { left: 14px; top: 50%; transform: translateY(-50%); font-size: 24px; }
.lightbox-next { right: 14px; top: 50%; transform: translateY(-50%); font-size: 24px; }

.site-footer { border-top: 1px solid var(--border); padding: 20px 0; color: var(--subtext); }
.site-footer .container { text-align: center; }
.site-footer .beian { margin-top: 8px; }
.site-footer .beian a { color: var(--subtext); text-decoration: none; border-bottom: 1px dotted var(--border); }
.site-footer .beian a:hover { color: var(--text); border-color: var(--primary); }

@media (max-width: 640px) {
  .site-title { font-size: 22px; }
  .search input { width: 52vw; }
  .lightbox-prev, .lightbox-next { top: auto; bottom: 14px; transform: none; }
}