@media screen and (max-width: 450px) { 
  header .hidden {
    display: none !important;
  }
} 

@media screen and (max-width: 800px) { 
  aside {
    display: none !important;
  }
  body .content article {
    width: 100%;
  }
} 

@media screen and (max-width: 1200px) { 
  /* body .content {
    width: 96%;
    padding: 0 2%;
  } */
  header {
    padding:15px 4% !important;
  }
  .content {
    padding: 0 4%  !important;
  }
  .footer_content {
    padding: 0 4% !important;
  }
} 

body {
  font-size: 14px;
  font-family: Arial,sans-serif;
  /*background-color: #f4f4f4;*/
  line-height: 1.42857143;
  color: #333;
  margin: 0;
  padding: 0;
  background-color: #f7f7f7;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  border-bottom: 1px solid #ccc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding:15px 9%;
  border: 1px solid #ccc;
  background-color: #fff;
  width:100%;
  height: 46px;
  position:fixed;
  box-sizing:border-box;
  top:0;
  left:0;
  box-shadow: 0 0 10px #ccc;
  z-index: 99999;
  /*font-weight: bold;*/
}

header div {
  display: flex;
  flex-wrap:wrap;
  align-items: center;
  font-size:14px;
}

header div span {
  padding: 0 5px;
  flex-shrink: 0;
}

header div a {
  margin-right:15px;
  flex-shrink: 0;
}

footer {
  border-top: 1px solid #ddd;
  padding: 15px 0;
  color: #333;
  font-size: 14px;
  background: #fff;
  /* background: #444;*/
  box-shadow: 0 0 10px #ccc;
  /*font-weight:lighter;*/
}

body img {
  max-width: 100%;
}

blockquote {
  margin-top: 5px;
  margin-bottom: 5px;
  padding-left: 1em;
  margin-left: 0px;
  border-left: 3px solid #ddd;
  opacity: 0.8;
}

.content {
  display: flex;
  /* width: 96%; */
  /* max-width: 1300px; */
  box-sizing:border-box;
  /* padding: 0 2%; */
  /* margin: 0 auto; */
  margin-top:46px;
  flex:1;
  padding: 0 9%;
}

header a {
  text-decoration: none;
  /*color: #3d7e9a;*/
  color: #25b864;
  font-weight: normal;
}

.content article {
  width: calc(100% - 320px);
  box-sizing: border-box;
  /* padding:15px;*/
  border-radius: 0px;
  margin-top: 10px;
  margin-bottom: 30px;
  padding: 24px;
  border: 1px solid #cccccc;
  background-color: #fff;
  font-size: 15px;
  line-height: 25px;
  letter-spacing: 1px;
  box-shadow: 0 0 10px #ccc;
}

article a {
  color: #25b864;
}

article ul,ol {
  padding-left: 1.5em;
}

.content aside {
  position:relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  width: 320px;
  margin: 10px auto;
  box-sizing: border-box;
}

.aside-wrap {
  position: fixed;
  width: 300px;
}
/*分类时，样式特殊化*/
aside .top.category {
  display: flex;
  flex-wrap: wrap;
  padding-right:0;
  box-shadow: none;
  border: none;
  background: none;
} 
aside .top.category ul {
  margin: 0;
  border: 1px solid #ccc;
  margin-bottom: 5px;
  margin-right: 8px;
  padding: 5px 8px;
  border-radius: 5px;

}
aside .top.category ul li span {
  margin-bottom: 0;
  padding-left: 0 !important;
}
aside .top.category ul li span.active{
  font-weight: bold;
  border: 0;
}

aside .top {
  max-height: calc(100vh - 143px - 250px); /* 防止窗体高度过小时，侧边栏显示异常的问题 */
  overflow-y: scroll;
  box-sizing: border-box;

  border-left: 1px solid #ccc;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  
  box-shadow: 0 0 10px #ccc;
  padding-right: 1em;
  background: #fff;
}

aside ul {
  list-style: none;
  /* padding-left: 1em; */
  padding-left: 0;
}

aside ul li span {
  color: #595959;
  display: block;
  margin-bottom: 5px;
  /* padding: 2px 0; */
}

aside ul li span:hover {
  /* background: #ddd; */
  cursor: pointer;
  color: #25b864;
}

aside ul li span.active {
  color: #25b864;
  border-left: 2px solid #25b864;
}

p img {
  display: block;
  margin: 0 auto;
}

article h1 {
  text-align: center;
  margin: 0px -24px;
  padding: 10px;
  /*
  border-left: 5px solid #228899;
  border-right: 5px solid #228899;
  */
  /*color: #ff7f00;*/
  color: #25b864;
  font-size: 19px;
  background: rgb(250,250,250);
}

.footer_content {
  display: flex;
  flex-wrap:wrap;
  padding: 0 9%;
  justify-content: space-between;
  color: #666;
}

.pointer {
  cursor: pointer;
}

.article-top {
  margin-top: 1em;
  padding: 8px;
  background: rgb(250,250,250);
  border-radius: 5px;
  border: 1px dashed #ccc;
}
.article-top a {
  text-decoration: none;
}

.article-top .flex {
  display:flex;
  flex-wrap: wrap;
  align-items: center;
  font-size:12px;
}
.article-top .keywords {
  margin-top: 5px;
}
.article-top .top-comment {
  padding: 0 8px;
  margin-left: 10px;
  border-radius: 5px;
  background-color: #ccc;
  cursor: pointer;
}

footer a {
  color: #25b864;
  text-decoration: none;
}

.category-ul {
  list-style: none;padding-left: 0;
}

.category-ul li {
  margin-bottom: 20px;
}

.category-ul li a {
  text-decoration:none;
  color: #25b864;
}