.main-header {background: rgb(0, 95, 167) url("../../images/bg.jpg") no-repeat;background-size:cover; height:200px; text-align:center;
display: flex; align-items: center;}
.main-header .title {width: 100%;font-weight:normal;letter-spacing:calc(2.5em);color: #fff;}

.wrapper {background-color: #fff;padding: 20px 30px; margin: 20px auto;}
.login-box {background-color: #fff;border: 1px solid #e9e9e9; overflow: hidden; width: 650px; margin: 80px auto 20px; padding: 40px 120px 40px;}
.tip{color:#898989;}
.buttons-wrapper{display: flex;}
.buttons-wrapper .btn{margin-right: 10px;}
.buttons-wrapper .btn:last-child{margin-right: 0;}

@media (max-width: 1024px) {
	.main-header .title{letter-spacing:calc(1.5em);}
}
@media (max-width: 640px) {
    .wrapper{padding:20px 0;}
    .main-header .title{letter-spacing:calc(0.5em);}
    .login-box{width: 100%;padding:40px 10px 40px;margin: 20px 0;}
}