@media screen and (max-width:720px){
     .main{
   			 margin-top:0px; 
   }
   #home_des{
    width: 100%;
    /* height: 620px; */
    background: url(../img/banner@2x.png) no-repeat 0px;
    background-position: 100% 100%;
    background-size: cover;
    /* width: 100%; */
    min-height: 30vh;
    /* background: url(web/img/banner@2x.png) no-repeat 0px; */
    /* background-position: bottom; */
    /* background-size: cover; */
    /* background-position: center center; */
    /* background-size: cover;*/
}
#ad_des{
    padding: 0px;
    margin: 0px;
    width: 20rem;
    /* height: 64px; */
    /* font-size: 30px; */
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    /* text-align: left; */
    color: #ffffff;
    text-shadow: 2px 3.46px 1.4px 0.28px rgba(149,0,255,0.65);
    /* position: absolute; */
    padding-top: 3rem;
    margin-left: 1rem;
}
#home_buttom{
             float: left;
    margin-left: 1rem;
    margin-top: 1rem;
}
.el-button.is-round {
    border-radius: 20px;
    padding: 6px 10px;
    width: 5.5rem;
}
.el-button{
     font-size: 9px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: center;
    color: #444444;
     margin-right: 0.5rem;
    padding: 6px 10px;
}
#learn_more{
    background: url(../img/bg1@2x.png) no-repeat 0px;
  background-position: 100%;
    background-size: contain;
    height:100%;
   
}
.learn1{
      

}
.learn1 p:first-child{
	 height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: center;
    color: #555555;
    padding-top: 20px;
}
.learn1 p:nth-child(2){
	    margin: 0px 1rem;
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: center;
    color: #555555;
}
#learn1_img{
     background: url(../img/img1@2x.png) no-repeat 0; 
     background-position: center; 
     background-size: contain; 
     height: 306px; 
     width:100%; 
    
}
.learn2{
       margin-top: -6rem;
    background: url(../img/img2@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn2 p:first-child{
   position: absolute;
    /* width: 214px; */
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    left: 50%;
    margin-top: 10rem;
}
.learn2 p:nth-child(2){
           position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: left;
    color: #555555;
    left: 50%;
    margin-top: 13rem;
}
.learn3{
        margin-top: -10rem;
    background: url(../img/img3@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn3 p:first-child{
        position: absolute;
    width: 214px;
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    /* text-align: left; */
    color: #555555;
    left: 55%;
    margin-top: 10rem;
}
.learn3 p:nth-child(2){
    position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    /* text-align: left; */
    color: #555555;
    left: 55%;
    margin-top: 13rem;
}
.p_font{
       position: absolute;
    width: 350px;
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    right: 50%;
}
.learn4{
    margin-top: -10rem;
    background: url(../img/img4@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn4 p:first-child{
    position: absolute;
    /* width: 214px; */
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    left: 50%;
    margin-top: 10rem;
}
.learn4 p:nth-child(2){
           position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: light;
    color: #555555;
    left: 50%;
    margin-top: 14rem;
}
 }
 @media screen and (min-width:721px){
 .main{
    margin-top:60px; 
}
#home_des{
     width: 100%; 
/*      height: 620px;  */
     min-height:118vh;
     background: url(../img/banner@2x.png) no-repeat 0px; 
    background-position: center; 
     background-size: cover; 
/*     width: 100%; */
/*     min-height: 120vh; */
/*     background: url(web/img/banner@2x.png) no-repeat 0px; */
/*     background-position: bottom; */
/*     background-size: cover; */
/*     background-position: center center; */
/*     background-size: cover; */
}
#ad_des{
	width: 453.5px;
	height: 64px;
	font-size: 30px;
	font-family: Arial, Arial-Bold;
	font-weight: 700;
	text-align: left;
	color: #ffffff;
	text-shadow: 2px 3.46px 1.4px 0.28px rgba(149,0,255,0.65); 
    position: absolute;
    top: 8rem;
    left: 8rem;
}
#home_buttom{
         float: left;
         margin-left: 8rem;
         margin-top: 18rem;
}
.el-button{
     font-size: 16px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: center;
    color: #444444;
    margin-right: 2rem;
}
#learn_more{
    background: url(../img/bg1@2x.png) no-repeat 0px;
    background-position: top;
    background-size: contain;
    height:100%;
    margin-bottom: 200px; 
}
.learn1{
      

}
.learn1 p:first-child{
	 height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: center;
    color: #555555;
    padding-top: 20px;
}
.learn1 p:nth-child(2){
	height: 12px;
	font-size: 13px;
	font-family: Arial, Arial-Regular;
	font-weight: 400;
	text-align: center;
	color: #555555;
}
#learn1_img{
     background: url(../img/img1@2x.png) no-repeat 0; 
     background-position: center; 
     background-size: contain; 
     height: 506px; 
     width:100%; 
     margin-top: 100px;
}
.learn2{
    margin-top: 100px;
    background: url(../img/img2@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn2 p:first-child{
    position: absolute;
    width: 214px;
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    left: 50%;
    margin-top: 5rem;;
}
.learn2 p:nth-child(2){
        position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: right;
    color: #555555;
    left: 50%;
    margin-top: 10rem;
}
.learn3{
    margin-top: 100px;
    background: url(../img/img3@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn3 p:first-child{
     position: absolute;
    width: 214px;
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    /* left: 20%; */
    margin-top: 5rem;
}
.learn3 p:nth-child(2){
 position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    /* text-align: left; */
    color: #555555;
    /* left: 20%; */
    margin-top: 10rem;
}
.p_font{
       position: absolute;
    width: 350px;
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: left;
    color: #555555;
    right: 50%;
}
.learn4{
    margin-top: 100px;
    background: url(../img/img4@2x.png) no-repeat 0;
    background-position: center;
    background-size: contain;
    height: 436px;
    width: 100%;
}
.learn4 p:first-child{
    position: absolute;
/*     width: 214px; */
    height: 16px;
    font-size: 17px;
    font-family: Arial, Arial-Bold;
    font-weight: 700;
    text-align: right;
    color: #555555;
    left: 50%;
    margin-top: 5rem;
}
.learn4 p:nth-child(2){
        position: absolute;
    /* width: 241px; */
    height: 12px;
    font-size: 13px;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: right;
    color: #555555;
    left: 50%;
    margin-top: 10rem;
}
.el-button.is-round {
    border-radius: 20px;
  /* padding: 6px 10px;*/
    width: 8.2rem;
}
}