@media (max-width:500px){
    .container{
        width: 250px;
    }
    /***  section 导航栏***/
    section div.sec_nav ul li a{
        display: inline-block;
        height: 30px;
        padding: 0 20px;
        line-height: 30px;
        /* color: rgb(53, 53, 53); */   
    }
    /**箭头**/
    div.sec_bgback .sec_leftWrite::after{
        content: '';
        position: absolute;
        top: -30px;
        left: 10px;
        width: 60px;
        height: 300px;
        border-right: 7px solid rgb(190, 190, 190,0.5);
        border-bottom: 7px solid rgb(189, 189, 189,0.5);
        transform: skewY(45deg);
        opacity: 0.7;
    }
}
@media (min-width:501px) and (max-width:768px){
    .container{
        width: 400px;
    }
}
@media (min-width:769px) and (max-width:1200px){
    .container{
        width: 700px;
    }
    /**** gif图 ****/
    div.sec_bgback .sec_rightPic .pic_center{
        width: 200px;
        margin:40px auto;
    
    }
}
@media screen and (min-width:1201px){
    .container{
        width: 1200px;
    }
    div.sec_bgback .sec_rightPic .pic_center{
        width: 400px;
        margin:80px auto;
    }
}
@media screen and (max-height:500px){
    .container{
        width: 1000px;
    }
}