/* 正文代码块的复制按钮（配合 Prism 暗色主题） */
.post-body pre {
  position: relative;
  padding-top: 2.2rem;
}
.code-copy-btn {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  padding: 0.1rem 0.55rem;
  font-size: 0.75rem;
  line-height: 1.5;
  color: #e6e6e6;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 0.25rem;
  cursor: pointer;
}
.code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}