* {
    margin: 0;
    padding: 0;
}

body {
    width: 1000px;
    margin: 0 auto;
    font-family: "微软雅黑";
    font-size: 16px;
    line-height: 30px;
}

a {
    text-decoration: none;
    color: red;
}
/* 设置header文字样式 */
header {
    margin-top: 10px;
    text-align: center;
    color: red;
    font-size: 18px;
    font-weight: bold;
   
}
/* 设置正文样式 */
article {
    margin-top: 10px;
    text-align:justify;
    text-indent: 2em;
}
   



#btn {
    width: 100%;
    /* height: 150px; */
    float: right;
    text-align: center;
    margin-top: 0px;
    margin-right: 0px;
    margin-left: 0px;
    font-size: 16px;
    font-weight: bold;
    /* border: 1px solid red; */
}

#btn li {
    /* 这里需要将li设为浮动才能变为横向 */
    display: inline-block;
    /* width: 140px; */
    height: 25px;
    line-height: 25px;
    /* margin-top: 15px; */
    text-align: left;
    cursor: pointer;
    margin-left: 0px; 
   text-indent: 0px;
   margin-left: 10px;
    /* border: 1px solid #999; */
    box-sizing: border-box;
}


#btn li:nth-child(1) {
    color: red;
    cursor: default;
}

.clear {
    clear: both;
}

#ved01 {
    /* display: none; */
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
}

.qianming {
    text-align: right;
   
}

.xz {
    /* margin-top: 10px; */
    text-align: right;
   
    color: red;
}

footer {
    text-align: center;
    
}