* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, "Microsoft YaHei", sans-serif; background: #f6f8fb; color: #222; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; background: #fff; border-bottom: 1px solid #e5e7eb; }
.topbar h1 { margin: 0; font-size: 20px; }
.topbar a { margin-left: 12px; text-decoration: none; color: #444; }
.topbar a.active { color: #0b67ff; font-weight: 600; }
.container { padding: 16px; }
.split { display: grid; grid-template-columns: 340px 1fr; gap: 16px; }
.pane { background: #fff; border: 1px solid #e5e7eb; border-radius: 8px; padding: 12px; min-height: 70vh; }
.actions { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
button { border: 1px solid #d1d5db; background: #fff; border-radius: 6px; padding: 6px 10px; cursor: pointer; }
button:hover { background: #f3f4f6; }
button.danger { color: #a70000; border-color: #f3c5c5; }
.items { list-style: none; margin: 0; padding: 0; max-height: 72vh; overflow: auto; }
.items li { display: flex; gap: 8px; align-items: center; border-bottom: 1px solid #f1f1f1; padding: 8px 2px; }
.items a { text-decoration: none; color: #0b67ff; }
.article-content img { max-width: 100%; height: auto; }
video { background: #000; border-radius: 6px; }
@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; }
  .pane { min-height: auto; }
}