/*头部 */
.boday_top_1 {
	background: rgba(255, 255, 255, .6);
	line-height: 72px;
	border-bottom: solid #f3f3f3 1px;
	color: #0480d7;
	font-size: 30;
	font-weight: bolder;
	text-shadow: #fff 1px 0 0, #fff 0 1px 0, #fff -1px 0 0, #fff 0 -1px 0;
}

.boday_top_2 {
	line-height: 72px;
	color: #0480d7;
}

.today_top_btn {
	background-color: #0480d7;
	border-radius: 10px;
	font-size: 1.5em;
}

 
#main_center{
	flex-grow: 1;
}
.boday_top_2 h2{
	font-size: 26px;
	text-align: center;
	font-weight: bold;
}

@media only screen and (max-width : 750px) {
	.boday_top_1 h1 {
		font-size: 24px;
	}
	.boday_top_2 h2 {
		font-size: 20px;
	}
	.boday_top_2 button {
		font-size: 16px;
	}
	 
	#main_center  {
		width: 100%;
		
	}
 
}

/*主体 */
.body_main{
	background:#f1f9ff url(../img/banner_system.png) no-repeat center 0;
	display: flex;
	flex-direction: column;
	justify-content: space-between;
	min-height: 100vh;
}

/*尾部 */
.footer {
	background: #0480d7;
	color: #fff;
	margin-top: 30px;
	width: 100%;
	box-sizing: border-box;
	-webkit-box-sizing: border-box;
  }