.w640 {
    max-width: 640px;min-width: 320px;
    margin: 0 auto;
    background-color: #FDFBDB;
}
.top img{
    width: 100%;
}
.tree3{
    max-width: 491px;
    max-height: 497px;
    margin: 0 auto;
}
.tree3 img{
    margin: 0 auto;
    width: 100%;
}
.zan{
    width: 100%;
    margin-top: 15px;
}
.zan .div1{
    max-width: 162px;
    max-height: 136px;
    margin: 0 auto;
    position: relative;
    text-align: center;
}

.zan img{
    width: 100%;
}
.test{
    position: absolute;
    left: 0%;
    font-size: 1.2em;
    color: #e75f96;
    top: 36%;
    width: 100%;
    font-weight: bold;
}
.top_test{
    max-width: 312px;
    max-height: 79px;
    margin: 0 auto;
}
.div2{
    max-width: 375px;
    max-height: 34px;
    margin: 0 auto;
    margin-top: 20px;
}
.bottom{
    width: 100%;
    overflow: hidden;
    margin-top: 20px;
}
.bottom a{
    width: 21%;
    float: left;
    padding: 2%;
}
/*登录*/
.phone,.username,.tip{
    margin-top: 28px;
    overflow: hidden;
}
.phone img,.username img{
    float:left;
}
.number{
    border: 2px solid #63a744;
    outline: none;
    height: 37px;
    margin: 0;
    padding: 1px;
    width: 300px;
    line-height: 40px;
    border-radius: 8px;
      background-color: #e7f1d7;
}
.text{
    border: 2px solid #63a744;
    outline: none;
    height: 35px;
    margin: 0;
    padding: 1px;
    width: 300px;
    line-height: 40px;
    border-radius: 8px;
    background-color: #e7f1d7;
}
.tip img{
 width: 100%;
}
.button{
    width: 208px;
    height: 48px;
    margin: 0 auto;
    padding: 40px 0;
}
.back{
    width: 208px;
    height: 44px;
    margin: 0 auto;
    padding: 80px 0;
}