.rack-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
    .rack-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; cursor: pointer; transition: all 0.2s; }
    .rack-card:hover { border-color: var(--accent-secondary); box-shadow: var(--shadow-md); }
    .rack-icon { font-size: 48px; margin-bottom: 12px; }
    .rack-name { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
    .layer-list { margin-top: 12px; }
    .layer-item { display: flex; justify-content: space-between; padding: 8px; background: var(--bg-tertiary); border-radius: 6px; margin-bottom: 6px; font-size: 0.9rem; }
    .layer-item.occupied { border-left: 3px solid var(--accent-warning); }
    .layer-item.free { border-left: 3px solid var(--accent-secondary); }
    
    /* 预约表单 */
    .reservation-form { background: var(--bg-tertiary); border-radius: 12px; padding: 20px; margin-top: 20px; }
    .species-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
    .species-tag { padding: 6px 12px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 20px; font-size: 0.85rem; cursor: pointer; transition: all 0.2s; }
    .species-tag:hover { border-color: var(--accent-secondary); }
    .species-tag.selected { background: var(--accent-secondary-light); border-color: var(--accent-secondary); }