.top>img{
    width: 100%;
}
main{
    width: 1300px;
    margin: 0 auto;
}
main>.bg{
    width: 95%;
    margin: 40px auto;
    position: relative;
}
main>.bg>img{
    width: 100%;
}
main>.bg>.lx{
    width:900px;
    height: 600px;
    background:rgba(255,255,255,0.5);
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -300px;
    margin-left: -450px;
}
main>.bg>.lx>h1{
    line-height: 100px;
    font-size: 50px;
    text-align: center;
    cursor: default;
}
main>.bg>.lx>.xx{
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}
main>.bg>.lx>.xx>div>span{
    font-size: 24px;
    cursor: default;
}
main>.bg>.lx>.xx>div>input{
    height: 50px;
    width: 200px;
    line-height: 50px;
    text-indent: 1em;
    font-size: 18px;
    outline: none;
    border: 0;
    border-radius: 10px;
    margin: 10px 0;
    background: rgba(255,255,255,0.8);
}
main>.bg>.lx>.nr{
    width: 90%;
    margin: 0 auto;
}
main>.bg>.lx>.nr>div>span{
    font-size: 24px;
    cursor: default;
}
main>.bg>.lx>.nr>div>textarea{
    width: 90%;
    height: 250px;
    resize: none;
    outline: none;
    border: 0;
    margin: 10px 0;
    padding: 0 5%;
    border-radius: 30px;
    font-size: 30px;
    background: rgba(255,255,255,0.8);
}
main>.bg>.lx>.btn{
    width: 100%;
    text-align: center;
}
main>.bg>.lx>.btn>input{
    width: 300px;
    height: 50px;
    margin: 0 auto;
    background: rgba(255,255,255,0.8);
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    font-size: 21px;
}