.login{
	    text-align: center;
	    margin: 0 auto;
	    width: 600px;
	    height: 520px;
	    background-color: rgba(67, 76, 99, 0.2);
	    border-radius: 25px;
	    box-shadow: 5px 2px 35px -7px #B6BBC4	;
	}
	.login h2{
	    margin-top: 40px;
	    color: skyblue;
		font-size: 40px;
		font:黑体;
	    font-weight: 100;
	}
	.login_form{
	    padding: 20px;
	}
	.login_form span{
	    color: rgb(131, 220, 255);
	    font-size: 18px;
	    font-weight: 100;
	}
	.login_form input{
	    background-color: transparent;
	    width: 320px;
	    padding: 2px;
	    text-indent: 2px;
	    color: white;
	    font-size: 20px;
	    height: 45px;
	    margin: 30px 30px 30px 5px;
	    outline: none;
	    border: 0;
	    border-bottom: 1px solid rgb(131, 220, 255);
	}
	input::placeholder{
	    color: black;
	    font-weight: 100;
	    font-size: 18px;
	    font-style: italic;
	}
	.login_btn{
	    background-color: rgba(255, 255, 255, 0.582);
	    border: 1px solid rgb(190, 225, 255);
	    padding: 10px;
	    width: 240px;
	    height: 60px;
	    border-radius: 30px;
	    font-size: 30px;
	    color: rgb(100, 183, 255);
	    font-weight: 100;       
	    margin-top: 15px;
	}
	.ddd:hover, .ddd:active {
	    color: red;
		text-decoration: none;
	}
	.ddd2{
		font:1.875rem,large;
		color: green
	}
	.ddd:link, .ddd:visited {
	    text-decoration: none;
		color: rgb(100, 183, 255);
	}