header{
    background: #262a37;
    height: 100px;
}
footer{
    height: 420px;
}
.main{
    background: #262a37;
    text-align: center;
    color: white;
    min-height: 1100px;
    flex: 1;
}
.main section {
    padding-top: 100px;
    padding-bottom: 100px;
}
.main section img {
    max-width: 60%;
}

.main section .title {
    font-size: 26px;
    margin-bottom: 20px;
    text-align: left;
    margin-left: 80px;
    position: relative;
}
.main section .title::before {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    left: -30px;
    top: 10px;
    border-radius: 100%;
    background: green;
}
.download-ul{
    /*height: auto;*/
    /*overflow: hidden;*/
    padding: 60px;
    box-sizing: border-box;
    height: 800px;
    background: #253044;
}
.download-ul li{
    width: 100%;
    height: 100px;
    margin-bottom: 20px;
    background: #262a37;
}
.img,.text{
    display: inline-block;
    float: left;
    line-height: 100px;
}
.img{
    margin-left: 40px;
}
.img img{
    vertical-align: middle;
}
.text{
    margin-left: 20px;
    color: #cecece;
}
.downloadBtn{
    display: inline-block;
    float: right;
    margin-right: 60px;
    line-height: 40px;
    width: 120px;
    height: 40px;
    margin-top: 30px;
    text-align: center;
    background: #edac3a;
    cursor: pointer;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    color: #ffffff;
}
@media only screen and (max-width: 1200px) {
    .docker{
        margin-bottom: 130px;
    }
    header{
        height: 100px;
    }
    body,html{
        height: 100%;
    }
    .container{
        display: flex;
        flex-direction: column;
        background: #262a37!important;
        height: 100%;
    }
    .main{
        flex: 1;
    }

}
@media only screen and (max-width: 300px) {
    footer{
        position: absolute;
        bottom: 0;
        width: 100%;
        height: 417px;
    }
}