body {
    font-family: Arial, sans-serif;
    margin: auto;
    background-image: url("img1.png");
    background-size: 100% 100%;
    background-attachment: fixed;
    color: #747474
}

.content {
    margin: auto;
    max-width: 720px;
    /*position: relative;*/
    background-color: rgba(255, 255, 255, 0.808);
    padding: 20px;
}

.content p {
    margin-top: 10px;
    margin-bottom: 10px;
    margin-left: 10px;
    margin-right: 10px;
}


.inf {
    border-top: 1px solid rgb(201, 201, 201);
    border-bottom: 1px solid rgb(201, 201, 201);
    padding: 0 16px;
}

.inf p {
    color: rgba(78, 78, 78, 0.623);
}

.content code {
    font-family: 'Consolas';
    margin-left: 50px;
}

.content img {
    margin: auto;
}



.navbar {
    background-color: rgb(228, 228, 228);
    padding: 10px;
    position: fixed;
    width: 100%
}

.navbar ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.navbar ul li {
    display: inline;
    margin-right: 20px;
}

.navbar ul li a {
    /* color: blue;
    font-family: 'StKaiti','SimHei';*/
    max-width: 100%;
    text-decoration: none;
    font-size: 16px;
}

.navbar img {
    max-width: 60%;
    min-width: none;
}

a:link {
    color: royalblue;
}

a:visited {
    color: royalblue;
}

a:hover {
    color: rgb(88, 180, 255);

}

a:active {
    color: rgb(103, 187, 255);
}

.cd {}

.cd ul {
    position: fixed;
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 40px;
    background-color: #f1f1f1;
}

.cd li a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}

/* 鼠标移动到选项上修改背景颜色 */

.cd li a:hover {
    background-color: #c4bebe;
    color: blue;
}


img {
    margin: auto;
    max-width: 90%;
    min-width: none;
    border-radius: 15px 15px 15px 15px;

}

video {
    max-width: 100%;
    min-width: none;
}

pre {
    background-color: aliceblue;
    border-right: 1px solid #000000;
    border-bottom: 1px solid #000000;
    border-top: 1px solid #000;
    margin-left: 10px;
    border-left: 1px solid #000;
}


blockquote {
    color: gray;
    margin-left: 16px;
    margin-right: 16px;
    padding: 0 16px;
    border-left: 3px grey solid;
}