.topic{width:100%;height:100vh;min-height:12.8rem;position:relative;overflow: hidden;background-image: url("bg.jpg");background-size:100% auto;background-position:top;background-repeat: no-repeat;background-color: #72BB38}
.topic img{display: block;max-width: 100%}
.topic input{outline: none}
.form{width:6rem;position: absolute;top:5.32rem;left: 0.3rem}
.form .input{overflow:hidden;margin-top:0.28rem;color:#333;font-size: 0.26rem;line-height: 0.8rem;padding-left:0.2rem}
.form .input input{color:#666;display:block;width:100%;background:none;line-height: 0.8rem;height: 0.8rem;font-size: 0.26rem}
.form .input .name{text-indent: 1rem}
.form .input .phone{text-indent: 1.5rem}
.form .submit{width:86%;height: 1rem;margin:0.48rem auto;}
.topic .topic-qr{width: 2.2rem;height: 2rem;position: absolute;top:10rem;right: 0}