auto.css

/* reset */
body {
	margin: 0;
	overflow: hidden;
	height: 100vh;
	font-size: 0;
	background-image: url('https://www.shuangye.club/NFM.png');
	background-position: 10% 100%;
	background-size: 100% auto;
	background-repeat: no-repeat;
  	background-attachment: fixed;
}
input {
	vertical-align: top;
	outline-width: 0;
	box-sizing: border-box;
	font-size: 16px;
	transition: all 0.3s linear;
}

form {
	display: block;
	margin: 10vh auto;
	max-width: 500px;
}
.logo {
	width: 100%;
	height: 300px;
	background-image: url('https://www.shuangye.club/OLOGO.png');
	background-size: contain;
	background-position: 50% 50%;
	background-repeat: no-repeat;
}
.ipttxt {
	width: 76%;
	height: 42px;
	border: 1px solid #cccccc;
	padding: 0 20px;
}
.ipttxt:focus {
	border-color: #f6b200;
}
.parent>input:submit {
	background: #F6B200;
}
.iptsmt {
	width: 24%;
	height: 42px;
	border-width: 0;
	background-color: #f6b200;
	cursor: pointer;
}
.iptsmt:hover {
	background-color: #e7a600;
}
.writer {
	font-size: 16px;
	position: relative;
	width:100%; position:fixed; left:0; bottom:0;
	text-align:center;
}
@media (max-width: 1335px) {
	body {
		margin: 0 10px;
		background-image: url();
	}
	.logo {
		background-image: url('http://m.shuangye.club/LOGO-TM.png');
	}
}