html,body{width:100%;height:100%;margin:0;padding:0}body::before{content:'';position:absolute;bottom:0;left:0;width:100%;height:50%;background:white;scrollbar-width:none;-ms-overflow-style:none;overflow-x:hidden;overflow-y:auto}.login-box{width:100%;max-width:20rem;height:290px;background-color:white;border-radius:8px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);padding-left:12px;padding-right:12px;box-shadow:0 3px 9px #cfcfcf;vertical-align:middle;text-align:center}input[id="username"],input[id="password"]{font-size:16px;height:20px;margin:0 auto;border-radius:4px;border:1px solid #b2b2b2;padding:10px 3px 10px 36px;width:80%;max-width:20rem}input[id="captcha"]{font-size:16px;height:20px;border-radius:4px;border:1px solid #b2b2b2;padding:10px 10px 10px 10px;max-width:20rem;width:80px;float:left;margin-left:10px}#submitBtn{width:95%;color:#fff;font-size:.98rem;border-radius:22px;background-color:#5f8cd0;border:0;height:2.5rem;line-height:2.5rem;margin-bottom:10px}.input_control{width:100%;text-align:center;padding-top:20px;margin-top:60px}.input_control:nth-child(1){width:100%;text-align:center;padding-top:30px}.input_control:nth-child(3){padding-bottom:20px}.login_img{position:absolute;width:25px;height:25px;margin-top:7px;margin-left:7px}a{color:#999;font-size:.85rem;text-decoration:none;margin-top:30px}.register{float:left;margin-left:10px}.forget_pwd{float:right;margin-right:10px}