/* Reset CSS */

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    /* Typography */

    body {
        font-family: Arial, sans-serif;
        font-size: 16px;
        line-height: 1.5;
        color: #63656f;
        background-color: #f2f3f5;
        cursor: pointer;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        margin: 1.5rem 0 1.5rem;
        line-height: 1.2;
        font-weight: bold;
        font-family: Arial, sans-serif;
    }

    p {
        margin-bottom: 1.5rem;
    }

    a {
        color: #007bff;
        text-decoration: none;
        line-height: 2rem;
        margin-right: 20px;
    }

    a:hover {
        color: #0056b3;
        text-decoration: underline;
    }

    .box {
        display: flex;
        flex-direction: row;
        height: auto;
        margin: 20px auto 40px;
        max-width: 1200px;
    }

    nav {
        width: 200px;
        min-width: 200px;
        font-size: 16px;
        padding: 0;
        border-radius: 2px;
        position: sticky;
        top: 20px;

    }

    nav>ul {
        background: #fff;
        padding-top: 20px;
        padding-bottom: 20px;
    }

    nav>ul>ol {
        margin-left: 10px;
        padding-left: 10px;
        padding-right: 10px;
        border-radius: 2px;
    }

    nav>ul>ol:hover {
        background-color: #eaf2ff;
    }

    #adc {
        width: 200px;
        height: 100px;
        margin-top: 10px;
        background-image: url("../img/ali_yun.jpg");
        background-repeat: no-repeat;
        background-size: cover;
        border-radius: 2px;
        -webkit-border-radius: 2px;
        -moz-border-radius: 2px;
        -ms-border-radius: 2px;
        -o-border-radius: 2px;
    }

    #right_box {
        background: #fff;
        margin-left: 20px;
        border-radius: 4px;
        width: 100%;
        overflow-x: visible;
        max-width: 980px;
        padding-left: 20px;
    }

    #page_title {
        height: 80px;
        line-height: 40px;
        margin: 0px;
        padding: 0px;
        padding: 20px;
        background: #fff;
        border-bottom: 1px solid #e5e6ea;
    }

    #content {
        width: 100%;
        height: auto;
        overflow-y: visible;
        padding: 0 40px 80px;
    }

    img {
        max-height: 300px;
        max-width: 100%;
        margin: 0 auto;
    }

    .button {
        color: #fff;
        background-color: #009a61;
        border-color: #008151;
        padding: 0 13px;
        font-size: 14px;
        border-radius: 4px;
        margin: 10px;
    }

    #show {
        width: 50%;
        border: 1px solid #ddd;
        padding: 50px;
        box-sizing: border-box;
        float: left;
        height: auto;
    }

    .hljs-comment,
    .hljs-quote {
        color: #989498
    }

    .hljs-variable,
    .hljs-template-variable,
    .hljs-attribute,
    .hljs-tag,
    .hljs-name,
    .hljs-selector-id,
    .hljs-selector-class,
    .hljs-regexp,
    .hljs-link,
    .hljs-deletion {
        color: #dd464c
    }

    .hljs-number,
    .hljs-built_in,
    .hljs-builtin-name,
    .hljs-literal,
    .hljs-type,
    .hljs-params {
        color: #fd8b19
    }

    .hljs-class .hljs-title {
        color: #fdcc59
    }

    .hljs-string,
    .hljs-symbol,
    .hljs-bullet,
    .hljs-addition {
        color: #8fc13e
    }

    .hljs-meta {
        color: #149b93
    }

    .hljs-function,
    .hljs-section,
    .hljs-title {
        color: #1290bf
    }

    .hljs-keyword,
    .hljs-selector-tag {
        color: #c85e7c
    }

    .hljs {
        display: block;
        background: #322931;
        color: #b9b5b8;
        padding: 0.5em
    }

    .hljs-emphasis {
        font-style: italic
    }

    .hljs-strong {
        font-weight: bold
    }

    pre>code.hljs {
        color: #333;
        background: #f8f8f8;
        border-radius: 4px;
    }

    pre>code {
        font-size: 14px;
        padding: 15px 12px;
        margin: 0;
        word-break: normal;
        display: block;
        overflow-x: auto;
        color: #333;
        background: #f8f8f8;
    }

    pre {
        font-family: Menlo, Monaco, Consolas, Courier New, monospace;
    }

    code {
        word-break: break-word;
        border-radius: 2px;
        overflow-x: auto;
        background-color: #fff5f5;
        color: #de6e58;
        font-size: .87em;
        padding: 0.065em 0.4em;
    }