/* 封面页样式 */
.gray-bg{
    background: #f8f8f8;
    padding: 40px 0;
}
.btn-sjfw {
    padding: 30px 0;
}
.btn-sjfw li{
    float: left;
    width: 690px;
    height: 100px;
    height: 100px;
    border-radius: 6px;
    margin-bottom: 20px;
}
.btn-sjfw li:first-child{
    background: url(../images/bg-sjfw01.png) no-repeat center;
    background-size: cover;
}
.btn-sjfw li:nth-of-type(2){
    background: url(../images/bg-sjfw03.png) no-repeat center;
    background-size: cover;
    float: right;
}
.btn-sjfw li:nth-of-type(3){
    background: url(../images/bg-sjfw03.png) no-repeat center;
    background-size: cover;
}
.btn-sjfw li:last-child{
    background: url(../images/bg-sjfw02.png) no-repeat center;
    background-size: cover;
    
}
.btn-sjfw li a{
    display: block;
    width: 100%;
    height: 100%;
    font-size: 20px;
    color: #fff;
    clear: both;
    overflow: hidden;
    line-height: 100px;
}
.btn-sjfw li a img{
    float: left;
    margin: 28px 20px 0 80px;
}

.product-list li{
    float: left;    
    margin-right: 30px;
}
.w-4 li{
    width: 327.5px;
}
.w-3 li{
    width: 343px;
    margin-bottom: 20px;
}
.w-3 li:nth-of-type(3n){
    margin-right: 0;
}
.w-4 li:last-child{
    margin-right: 0;
}
.product-list li img{
    width: 100%;
    height: 246px;
    margin-bottom: 10px;
}
.product-list li p{
    font-size: 18px;
    text-align: center;
    margin-bottom: 20px;
}