.topic{width:100%;height:100vh;position:relative;overflow: hidden;background-image: url("bg.jpg");background-size:100% auto;background-position:top;background-repeat: no-repeat;background-color: #EBEBD3}
@media(max-height: 12rem){.topic{height:12rem}}
.topic img{display: block;max-width: 100%}
.topic input{outline: none}
.form{background:#F7FBFE;border-radius: 0.2rem;width: 5.8rem;height:4rem;position: absolute;bottom:1.28rem;left: 0.3rem;padding:0.5rem 0.4rem 0}
.form .input{overflow:hidden;margin-bottom:0.26rem;width:5rem;color:#666;border:0.01rem solid #ccc;border-radius:0.1rem;background:#fff;font-size: 0.26rem;line-height: 0.8rem;padding-left:0.2rem}
.form .input .title{display: inline-block;line-height: 0.8rem;float: left}
.form .input input{color:#666;display:block;background:none;line-height: 0.8rem;height: 0.8rem;font-size: 0.26rem;width: 3rem}
.form .submit{width:100%;line-height: 0.8rem;background:#004475;color:#fff;text-align: center;border-radius:0.5rem;font-size:0.3rem;margin-top:0.36rem}