.code-wrapper {
  width: 100%;
  margin: 12px 0;
}

.code-wrapper pre {
  position: relative;
  margin: 0;
  border-radius: 10px;
  overflow: hidden;

  background: #282c34;
}

/* 覆盖 hljs 默认背景，把黑框交给 pre 管 */
.code-wrapper pre code.hljs {
  display: block;
  background: transparent;
  padding: 44px 16px 16px;
  overflow-x: auto;
}

/* 如果没有被 hljs 加上 .hljs，也兜底一下 */
.code-wrapper pre code {
  display: block;
  padding: 44px 16px 16px;
  overflow-x: auto;
}

.code-lang {
  position: absolute;
  left: 12px;
  top: 10px;
  z-index: 3;

  color: rgba(255, 255, 255, 0.72);
  font-size: 20px;
  font-family: Consolas, Monaco, monospace;
  user-select: none;
}

.copy-code-btn {
  position: absolute;
  right: 10px;
  top: 8px;
  z-index: 4;

  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 7px;
  padding: 4px 10px;

  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.86);
  font-size: 12px;
  cursor: pointer;
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}