html,body {
    height: 100%;
    margin: 0; 
    padding: 0;
}
.swrapper {
        width: 100%;
    height: auto;
    margin-bottom: 30px;
}
.swrapper_top {
    width: 1200px;
    height: auto;
    margin:0 auto;
    margin-top:30px;
}
.swrapper_center_content {
    width: 1100px;
    margin:0 auto;
    margin-top:20px;
    height: auto;
    display: flex;
    justify-content: space-between;
}
.swrapper_center_content_left {
    position: relative;
    width: 29.5%;
    height: 100%;
    margin: 15px;
}
p {
    color: #666666;
}
li {
    color: #666666;
    font-size: 12px;
}