/**
 * 无障碍辅助样式：跳至主内容（WCAG 2.4.1 Bypass Blocks）
 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  padding: 0.75rem 1.25rem;
  background: #fff;
  color: #1e293b;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid #c41e3a;
  border-radius: 0.375rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
  outline: 3px solid #c41e3a;
  outline-offset: 2px;
}