@media(max-width:500px){
	/* head */
.box2{
width: 100%;

}
.box2 img{
	position: absolute;
	display: block;
	height: 50px;
	right: 10px;
	top: 5px;
}
.btn5{
	display: inline;
	color: white;
	text-align: center;
	position: absolute;
	margin: 0 95px;
}
.box3{
	display: none;
}
/* ceibian */

.side-nav ul li ul{
	display: none;
}

.side-nav ul li ul li a{
	font-size: 12px;
}

.side-nav ul li:hover ul{
	display: block;
	left: 0;
	width:170px;
	margin-top: 1px;
}
#side-menu h3{
	text-align: center;
}
.side-nav{
	height: 580px;
	position: fixed;
	z-index: 1;
	top:0;
	left: 0;
	background-color: #415498;
	opacity: 1;
	overflow-x: hidden;
	padding-top: 0;
	padding-left: 0;
	transition: 0.5s;
}
.side-nav img{
	margin-top: 8px;
	margin-left: 2px;
	height: 77px;
	width: 194px;
}
.side-nav a{
	padding: 10px 0px 10px 20px;
	text-decoration: none;
	font-size: 18px;
	color: white;
	display: block;
	transition: 0.1s;
}
.side-nav ul a:hover{
	margin-left: 10px;
	width:140px;
	background: lightblue;
	color: black;
}
.side-nav .btn-close{
	position: absolute;
	top: 0;
	right: 1px;
	left: 140px;
	font-size: 36px;
}

/* what */

#what{
	display: flex;
	background: url(../img/2.jpg) no-repeat center center/cover;
	height: 100%;
	width: 100%;
}
#what .all{
				width: 100%;
				height: 100%;
				position: relative;
				display: block;
				
			}
			#what .all .pro{
				position: relative;
				width: 360px;
				/* height: 80vh; */
				background-color:lightblue;
				margin:10px auto;
				display: block;
				border: 1px solid white;
			}
			
			#what .all .pro .img1{
				
				/* width: 120px;
				height: 140px; */
				text-align: center;
				/* margin: 20px 95px; */
			}
			#what .all .pro .img2{
				/* margin: 20px 100px; */
			}
			#what .all .pro .contect{
				
				padding: 6px;
				background-color: #3b5998;
				color: white;
				margin: -290px auto 0;
				text-align: center;
			}
			#what .all .pro .text1{
				height: auto;
				padding: 20px;
				line-height: 1.6;
			}
			#what .all .pro .text1 p{
				margin-top: 10px;
			}
			#what .all .pro .contect a{
				
				text-decoration: none;
				color: white;
			}

/* home */
#home{
	background: url(../img/1.jpg) no-repeat center center/cover;
	height: 100vh;
}
#home p{
	color:white;
}

/* rool */
#rool h2{
	padding: 5px;
}
#rool .btn3{
	display: block;
}
#rool .btn3 h2{
	color: black;
	margin: 10px;
}
#rool .tipsContainer{
	flex-direction: column;
}
#rool .imgs{
	text-align: center;
	margin-left: 10px;
}

#rool .item{
	padding: 10px 25px 20px 25px;
	margin: 15px;
}
#rool .productBookTitle{
    padding: 0px 15px;
}
#rool .imgs img {
	height: auto;
    margin-right: 10px;
    margin-bottom: 10px;
    width: 90%;
}
#rool .QATips{
	padding-left: 0;
}
/* head */
#navbar ul li a{
	padding: 5px;
}
}