body{
background: linear-gradient(to right,#fff1eb,#ace0f9);
}
#topics,#blog-news,#sidebar_categories,#sidebar_search,#comment_form_container,#cnblogs_c1,#under_post_news,#under_post_kb,
.entrylistItem{
background:rgba(245,245,245,.5);
/*opacity:0.9*/
}
/*添加按钮*/
.cnblogs-markdown pre {
  position: relative;
}
.cnblogs-markdown pre > span {
  position: absolute;
  top: 0;
  right: 0;
  border-radius: 2px;
  padding: 0 10px;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  cursor: pointer;
  display:none;
}
.cnblogs-markdown pre:hover > span {
  display:block;
}
.cnblogs-markdown pre > .copyed {
  background: #67c23a;
}
#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  border: none;
  outline: none;
  background-color: rgba(255,162,76,0.8);
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 10px;
}

#myBtn:hover {
  background-color: #555;
}