.about{
    background: #f5f5f5;
    margin: 100px auto 16px auto;
}
.about .ly{
    padding: 0;
}
.about .ly_text{
    text-align: left;
    padding: 30px;
}
.about .ly_text h2{
    font-size: 28px;
    margin-bottom: 30px;
}
.about .ly_text .des_text{
    line-height: 1.8;
    margin-bottom: 60px;
}
.about .ly_text .des_label{
    margin-bottom: 10px;
}
.about .ly_text .des_label label{
    text-align: right;
    width: 6em;
    margin-right: 0.5em;
}
.about .ly_text .des_label label::after{
    content: '|';
    margin-left: 0.3em;
    font-weight: lighter;
}
.des_text_lots{
    line-height: 1.8;
    text-align: left;
}
.three_goal{
    margin-top: 60px;
    margin-bottom: 100px;
}
.three_goal li{
    position: relative;
    padding: 0;
    width: 31.3%;
    margin-right: 3%;
    overflow: hidden;
}
.three_goal li:nth-child(3){
    margin-right:0;
}
.three_goal li .bg_img{
    width: 100%;
    transition: all 0.6s;
}
.three_goal li:hover .bg_img{
    transform: scale(1.1);
}
.three_goal .cover{
    width: 100%;
    height: 100%;
    background: url(../images/cover.png);
    position: absolute;
    left: 0;
    top:0;
    transition: all 0.6s;
}
.three_goal .cover .icon{
    margin-top: 60px;
    margin-bottom: 16px;
    transition: all 0.6s;
    height: 60px;
}
.three_goal .cover h3{
    color: #fff;
    font-size: 22px;
}
.three_goal .cover:hover{
    background: url(../images/cover1.png);
}
.three_goal .cover:hover .icon{
    opacity: 0;
    height: 0;
}
.three_goal .cover .hide_text{
    margin-top: 10px;
    width: 0;
    overflow: hidden;
    transition: all 0.6s;
}
.three_goal .cover .hide_text p{
    color: #fff;
    white-space:nowrap;
}
.three_goal .cover:hover .hide_text{
    width: 100%;   
}
@media (max-width: 500px) {
    .about {
        background: #f5f5f5;
        margin: 0px auto 0px auto;
    }
    .about .ly_text {
        text-align: left;
        padding: 5%;
    }
    .about .ly_text h2 {
        font-size: 1.8em;
    }
    .about .ly_text .des_text {
        margin-bottom: 30px;
    }
    .des_text_lots {
        line-height: 1.8;
        text-align: left;
        padding: 5%;
    }
    .about .ly_text .des_label label {
        text-align: left;
        width: 6em;
        margin-right: 0.5em;
        display: block;
    }
    .about .ly_text .des_label label::after {
        content: '';
    }
    .three_goal {
        margin-top: 0px;
        margin-bottom: 30px;
    }
    .three_goal li {
        position: relative;
        padding: 0;
        width: 100%;
        margin-right: 0%;
        overflow: hidden;
        margin-bottom: 4px;
    }
    
}