body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: Verdana, Helvetica, Arial, sans-serif;
  font-size: 14px;
  background: white;
  color: black;
  flex-direction: column;
  width: 100%;
}

body a{
  text-decoration: none;
  color: darkblue;
}

body a:hover{
  color: red;
}

body hr {
  height: 0.5px;
  background-color: darkblue;

}

main {
  flex: 1;
  padding: 20px;
}

.container {
  width: 100%;
  margin: 0 auto;   
  padding: 0 7px;    
  box-sizing: border-box;
}

header {
  position: sticky;
  top: 0;
  background: darkblue;
  color: white;
  height: 60px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
  display: flex;
  align-items: center;
}

header .banner {
  width: 190px;
  height: 60px;
  object-fit:contain;
  margin-left: -40px;
  margin-top: 3px;
}

.topnav {
  position: sticky;
  top: 60px;
  background: white;
  border-bottom: 1px solid darkblue;
  width: 100%;
  margin: 0 auto;
  z-index: 9999;
}

.topnav > .container > ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}

.topnav li {
  position: relative;
}

.topnav a {
  display: block;
  padding: 0.75em 1em;
  color: darkblue;
  text-decoration: none;
  cursor: pointer;
}

.topnav a:hover {
  text-decoration: underline;
}

.topnav a.active {
  font-weight: bold;
  text-decoration: underline;
}

.content {
  padding: 0;
  margin: 0 3em;
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
  color: darkblue;
  font-family: 'Lucida Sans', Verdana, sans-serif;
}

.content h2 {
  border-bottom: 1px solid darkblue;
  padding-bottom: 0.3em;
  margin-top: 1.5em;
}

footer {
  background: white;
  border-top: 1px solid darkblue;
  width: 100%;
  margin: 0 auto;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  display: block;
  overflow-x: auto;
}

th, td {
  border: 1px solid black;
  padding: 0.5em 1em;
  text-align: center;
}

th {
  background-color: darkblue;
  color: white;
}

code {
  background-color: darkblue;
  color: white;
  padding: 1px 3px;
  border-radius: 5px;
}

.highlight {
    background-color: darkblue;
    overflow-x: auto;
    margin: 20px 0;
    word-break: normal;
    display: block;
    white-space: pre;
}

.highlight pre, pre code {
  background-color: darkblue !important;
  display: block;
  margin: 0;
}

.highlight code {
    font-family:"Fira Code", "JetBrains Mono", "Cascadia Code";
    color: #ffffff;
    line-height: 20px;
    background-color: darkblue;
    font-size: 0.95rem;
}

.highlight .k { color: #00FFFF; } /* 关键字 */

.highlight .nc { color: #FFD700; font-weight: bold; } /* 类/类型名 */

.highlight .nf { color: #7cfc00; font-weight: bold;} /* 函数名 */

.highlight .s  { color: #ffa500; } /* 字符串 */

.highlight .c  { color: #B0C4DE; font-style: italic; } /* 注释 */

.highlight .m { color: #ff69b4; } /* 数字 */

.highlight .o { color: #ffffff;} /* 操作符 */

.highlight .p { color: #d3d3d3;} /* 标点 */

.katex { 
  font-size: 1.2rem; 
  color: #222; 
}

.katex-display { 
  margin: 1em 0; 
  text-align: left !important;
}

.katex-display > .katex {
  display: inline-block;
  text-align: left !important;
}

p .katex { 
  margin-left: 0.2em; 
  margin-right: 0.2em; 
}

blockquote {
  border-left: 4px solid black;
  padding: 1px 20px;
  margin: 1rem 0;
  background-color: darkblue;
  color: white;
  font-style: bold;
  position: relative;  
}

blockquote p {
  margin-top: 0.3rem !important;
  margin-bottom: 0.3rem;
}

blockquote::before {
  content: ">";
  position: absolute;
  left: 5px;
  top: 0.4rem;
  color: white;
}

ul, ol {
  padding-top: 0;
  margin-left: -20px;
}

.hugo-logo {
  max-width: 100px;
  height: auto;
  display: flex;
}