#all {
    width: 1366px;
    height: 1688px;
    border: solid 1px white;
    margin: auto;
    margin-top: 0;
    background-image: url("imageindex.jpg");
    background-repeat: no-repeat;
    /*filter: alpha(opacity=85); 设置背景图片透明度
    -moz-opacity: 0.85;
    -khtml-opacity: 0.85;
    opacity: 0.85;*/
}

#d3 {
    width: 996px;
    height: 1400px;
    background-color: #f7f2f2;
    border: none;
    margin: 0 auto;
    margin-top: 5px;
    font-size: 30px;
    font-weight: bold;
    overflow: scroll;
}

#d31 {
    margin-top: 30px;
    font-size:15px;
    position: absolute;
}
    /*左侧菜单*/

    #d31 li {
        font-family: YouYuan;
        list-style-type: none;
    }

    #d31 a {
        font-family: YouYuan;
        color: black;
        text-decoration: none;
    }

        #d31 a:hover {
            text-decoration: underline;
            color: #fff;
        }

.menu_top {
    width: 150px;
}

    .menu_top a {
        height: 50px;
        line-height: 50px;
        background-color: #a2e0fb;
        display: block;
        border-left: solid 10px #f8e7e7;
        padding-left: 10px;
    }

#d321 {
    width: 360px;
    height: 240px;
    border: none;
    float: left;
    margin-top: 30px;
    margin-left: 180px;
    text-align: center;
    font-size: 18px;
    font-family: 'Microsoft YaHei';
    font-weight: 400;
}

#d322 {
    width: 360px;
    height: 240px;
    border: none;
    margin-top: 30px;
    margin-right: 40px;
    float: right;
    text-align: center;
    font-size: 18px;
    font-family: 'Microsoft YaHei';
    font-weight: 400;
}

#d323,#d325,#d327,#d329{
    width: 360px;
    height: 240px;
    border: none;
    margin-top: 60px;
    margin-left: 180px;
    float: left;
    text-align: center;
    font-size: 18px;
    font-family: 'Microsoft YaHei';
    font-weight: 400;
}

#d324,#d326,#d328,#d310,#d330 {
    width: 360px;
    height: 240px;
    border: none;
    margin-top: 60px;
    margin-right: 40px;
    float: right;
    text-align: center;
    font-size: 18px;
    font-family: 'Microsoft YaHei';
    font-weight: 400;
}