body {
  padding: 0;
  margin: 0;
  font-family: "LXGW WenKai Screen R";
}

h1 {
  font-size: 35px;
}

h2 {
  font-size: 30px;
}

h3 {
  font-size: 20px;
}

.header {
  margin: 0 auto;
  max-width: 800px;
  display: flex;
  margin-top: 20px;
  margin-bottom: 50px;
}

.header a {
  text-decoration: none;
  color: initial;
}

.sitetitle {
  font-size: 30px;
}

.menu {
  margin-top: 10px;
  margin-left: 400px;
  font-size: 20px;
}

.menu a {
  padding-left: 10px;
}

.menu a:hover {
  font-weight: 600;
}

.homepage {
  max-width: 800px;
  margin: 0 auto;
}

.homepage-article-list {
  display: flex;
  line-height: 1.7;
}

.homepage-article-link {
  color: initial;
  text-align: left;
  font-size: 20px;
  text-decoration: none;
}

.homepage-article-link:hover {
  font-weight: 600;
}

.homepage-article-date {
  flex: 1;
  text-align: right;
}

.article {
  max-width: 800px;
  margin: 0 auto;
}

.article-title {
  text-align: center;
}

.article-info {
  text-align: center;
  color: gray;
}

.article-content {
  margin-top: 20px;
}

.article-content p,
.article-content li {
  font-size: 20px;
  line-height: 2;
}

.article-content img {
  max-width: 100%;
}

.article-content br {
  height: 1px;
  width: 100%;
}

.article-content blockquote {
  background: #f8f9fa;
  border-left: 5px solid #7a7a7a;
}

.article-content blockquote p {
  padding: 20px;
  font-size: 15px;
}

.article-content pre {
  position: relative;
  padding: 15px;
  background: #f3f6f8;
  border-radius: 10px;
  overflow-x: auto
}

table {
  border-collapse: collapse;
}

tr {
  border-top: 1px solid #dfe2e5;
}

td,
th {
  border: 1px solid #dfe2e5;
  padding: 0.6em 1em;
}

.article-content .highlight {
  background-color: blue;
}

.article-content code {
  font-size: 17px;
  background: #f3f6f8;
  border-radius: 10px;
  padding: 5px;
  line-height: 25px;
}

.article-content a {
  text-decoration: none;
  color: rgb(5, 148, 203);
}

.article-content a:hover {
  color: #96ccff;
  transition: .2s ease-in-out;
}

.article-copyright-protocol {
  padding: 10px;
  margin-top: 20px;
  background: #f8f9fa;
}

.article-copyright-protocol p {
  line-height: 30px;
  margin-block: 0;
  margin-inline-start: 20px;
}

.article-copyright-protocol a {
  color: black;
  text-decoration: none;
}

.article-copyright-protocol a:hover {
  color: #96ccff;
  transition: .2s ease-in-out;
}

.article-comments {
  margin-top: 30px;
}

.categories {
  max-width: 800px;
  margin: 0 auto;
}

.category {
  font-size: 18px;
  margin-bottom: 30px;
  padding: 10px;
  text-decoration: none;
  line-height: 1.7;
  text-align: center;
  background: #fcfcfc;
  border-radius: 10px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, .1);
  -webkit-box-shadow: 0 1px 5px rgba(0, 0, 0, .1);
}

.category a {
  text-decoration: none;
}

.category-article {
  display: flex;
}

.category li {
  list-style: none;
  text-align: left;
}

.category span {
  flex: 1;
  text-align: right;
}

.friends {
  margin-top: 50px;
  margin-bottom: 10px;
  margin-left: 80px;
  display: flex;
  flex-wrap: wrap
}

.friend-link-a {
  text-decoration: none;
  width: 270px;
  height: 80px;
  margin: 0 0 20px 50px;
  position: relative;
  display: block;
  line-height: 80px;
  text-align: center;
  color: darkgreen;
  font-size: 17px;
  cursor: pointer;
  background: #fcfcfc;
  border-radius: 10px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, .1);
  -webkit-box-shadow: 0 1px 5px rgba(0, 0, 0, .1);
  transition: .3s;
  -webkit-transition: .3s
}

.friend-link-a:hover {
  box-shadow: 0 2px 5px rgba(0, 0, 0, .3);
  -webkit-box-shadow: 0 2px 5px rgba(0, 0, 0, .3)
}

.friend-link-a span {
  margin-left: 30px;
  text-decoration: none
}

.friend-link-logo {
  position: absolute;
  top: 8px;
  left: 10px;
  border-radius: 10px;
  width: 64px;
  height: 64px
}

/* .friends-apply{
  max-width: 700px;
  margin: 0 auto;
} */
.friends-apply p,
.friends-apply li {
  font-size: 20px;
  line-height: 1.5;
}

.footer{
  margin: 0 auto;
  width: 800px;
}

.copyright {
  padding: 10px;
  text-align: center;
}

.copyright a {
  color: black;
  text-decoration: none;
}

.copyright a:hover{
  font-weight: 600;
}

hr {
  border: 1px dotted #eeeeee;
}

.copy-button {
  position: absolute;
  border: none;
  border-radius: 6px;
  right: 0;
  top: 0;
  margin: 15px 10px;
  transition: .1s;
  opacity: 0.3;
}


.copy-button:hover,
.copy-button:focus,
pre:active~.copy-button,
pre:focus~.copy-button,
div.highlight:active>.copy-button,
div.highlight:focus>.copy-button {
  cursor: pointer;
  opacity: 1;
}

@media screen and (max-width: 980px) {
  body {
    margin: 28px;
  }

  .footer {
    width: initial;
  }

  .copyright {
    padding: 10px;
  }

  .header {
    max-width: 700px;
    display: flex;
    margin-bottom: 10px;
  }

  .menu {
    margin-top: 10px;
    margin-left: 5px;
  }

  .category-article li {
    width: 270px;
  }

  .friends {
    margin-left: 15px;
  }

}

@media screen and (max-width: 500px) {
  .sitetitle {
    font-size: 28px;
    margin-bottom: 20px;
  }
  
  .homepage-article-link{
    font-size: 18px;
    width: 270px;
  }

  .homepage-article-date{
    margin-top: 1px;
    font-size: 15px;
  }

  .menu {
    margin-top: 12px;
    margin-left: 30px;
    font-size: 15px;
  }

  .category{
    font-size: 15px;
  }

  .category-article li {
    width: 250px;
  }

  .friends {
    margin-left: -5px;
  }
}