.service-list {
    margin: 0 -2%;
}
.service-list li {
    width: 50%;
    padding: 0 2%;
    margin-bottom: 40px;
}
.service-list li:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
}
.service-list .pic {
    float: left;
    width: 200px;
}
.service-list .service-pic {
    width: 200px;
    height: 200px;
    border: 5px solid #ccc;
    overflow: hidden;
    -webkit-border-radius: 200px;
            border-radius: 200px;
}
.service-list .txt {
    margin-left: 215px;
}
.service-list .service-title {
    font-size: 20px;
    font-weight: bold;
    color: #222;
    line-height: 1.5;
    margin-bottom: 5px;
}

@media screen and (max-width: 1300px) {
    .service-list {
        max-width: 960px;
        margin: 0 auto;
    }
    .service-list li {
        width: 100%;
        display: block;
    }
}
@media screen and (max-width: 639px) {
    .service-list li,
    .service-list .pic,
    .service-list .txt {
        display: block;
        float: none;
        margin: 0 auto 20px;
    }
    .service-list li {
        margin-bottom: 40px;
        max-width: 320px;
        padding: 0;
    }
    .service-list .pic,
    .service-list .service-pic {
        max-width: 200px;
        width: auto;
        height: auto;
    }
    .service-list .txt {
        padding-left: 0;
    }
    .service-list .service-title {
        text-align: center;
    }
}