.navbar-collapse .navbar-right{
	margin-right: 45px!important;
}
.navbar-default .navbar-nav>.open>a, 
.navbar-default .navbar-nav>.open>a:focus,
.navbar-default .navbar-nav>.open>a:hover {
    background-color: white!important;
}
.tu{
	position: relative;
}
.container{
	margin-left: 0!important;
	margin-right: 0!important;
	padding-left: 0!important;
}
#box1{
	width: 100%;
	height: auto;
	position: absolute;
	margin-top: -15%;
	text-align: center;
}
		
.txt1{
	text-align: center;
	display: block;
	font-size: 30px;	
	color: white;
	font-family: "Times New Roman", Times, serif;
}
.txt2{
	text-align: center;
	display: block;
	font-size: 16px;	
	color: white;
	font-family: "Times New Roman", Times, serif;
}
/*第四部分栅格系统*/
.screen2{
	width: 100%;
	height: auto;
	/*background-color: blueviolet;*/
	position: relative;
}
.box4{
	width: 90%;
	height: auto;
	/*background-color: yellow;*/
	position: relative;
	margin-left: 6%;
    margin-top: 5%;
}
.row1{
	margin-bottom: 5%;
}
/*动画效果*/
.box4{
	animation: go 5s ease;
}

@keyframes go{
    from {
        /*height: 0px;*/
        top : -200px;
        opacity: 0;
    }
    to {
        /*height: 400px;*/
        top : 0px;
        opacity: 1;
    }
}

.row{
	margin-left: 0px;
	margin-right: 0px;
}
.row1 .col-md-4{
	width: 30%;
	margin: 5px 12px;
	height: auto;
}

.col1{
	height: 232px;
	border: 1px solid rgb(238,238,238);
}
.col1:hover{
	box-shadow: 0px 0px 12px paleturquoise;	
}

.row .dtu{
	text-align: center;
	margin: 10px auto;
	overflow: hidden;
}
.row img{
	display: block;
	width: 85%;
	height: auto;
	margin: 10px auto;	
}
.col1:hover img{
	transform: scale(1.2) ;
	transition: 1s;
}
.col1 h4{
	font-size: 30px;
    font-weight: 900;
    color: #74c000 !important;
	text-align: center;
	margin: 20px auto;
}

.txt{
	text-align: center;
	width: 80%;
	margin: 20px auto;
	color: gray;
}

/*底部内容的样式*/
.footer{
	width: 100%;
	height: auto;
	background-color: rgb(25, 32, 37);
}

.foottxt{
	position: absolute;
	font-size: 20px;
    color: rgb(153, 153, 153);
    margin-left: 2%;
    margin-top: 5%;
}
.foottxt2{
	padding-left: 1%;
}
.num{
	color: rgb(153, 153, 153)!important;
	padding-top:10%;
	padding-left: 22%;
}

.foottu{
	margin-top:2%;
	margin-left: 1.5%;
}

/*返回顶部样式*/
#top{
	width: 35px;
	height: 35px;
	background-color: gray;
	opacity: 0.7;
	position: fixed;
	right: 20px;
	bottom: 25px;
	display: none;
}

.toptxt{
	margin: 14px 8px;
	text-align: center;
	font-size: 20px!important;
	font-weight: 100!important;
	color: white!important;
	line-height: 40px;
}



@media (max-width: 500px) { 
	.row1 .col-xs-12{
		width: 100%;
		margin: 5px 12px;
		height: auto;	
	}
	.box4{
		margin-left: 2.5%;
	}
	
	.carousel-inner img{
		margin-top: 15%;
	}
	#box1{
		margin-top: -23%;
	}
}

@media (min-width:501px) and (max-width: 601px) { 
	.row1 .col-xs-12{
		width: 100%;
		margin: 5px 12px;
		height: auto;	
	}
	.box4{
		margin-left: 2.5%;
	}
	
	.carousel-inner img{
		margin-top: 15%;
	}
	#box1{
		margin-top: -23%;
	}
}
@media (min-width:602px) and (max-width: 768px) { 
	.row1 .col-xs-12{
		width: 100%;
		margin: 5px 12px;
		height: auto;	
	}
	.box4{
		margin-left: 2.5%;
	}
	
	.carousel-inner img{
		margin-top: 12%;
	}
	#box1{
		margin-top: -20%;
	}
	
}
@media (min-width:769px) and (max-width: 869px) { 
	.box4 .col-md-4{
		width: 40%;
		height: auto;
	}
	.box4{
		margin-left: 9%;		
	}
	
}