/* ===== 系统设置页 =====
 * 仅新增少数专用 class，其余全部复用 css/style.css。
 */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--blue-600);
  font-size: 13px;
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  background: var(--blue-50);
  transition: all .15s;
  margin-right: 12px;
  white-space: nowrap;
}
.back-link:hover { background: var(--blue-100); }

.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px;
}
.systems-grid label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  background: #fff;
  transition: all .15s;
}
.systems-grid label:hover { border-color: var(--blue-500); background: var(--blue-50); }
.systems-grid input { margin: 0; }

.modal { width: 640px; }
.modal-body .form-row { grid-template-columns: 1fr 1fr; gap: 12px; }

/* 返回首页（侧边栏底部） */
.nav-item-home {
  margin-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 10px;
  color: #ffd43b !important;
}
.nav-item-home:hover { background: rgba(255,255,255,0.08); }