@charset "UTF-8";

main {
	width: 960px;
	margin: 0 auto;
}
h1 {
	text-align: center;
	margin-top: 50px;
	font-weight: bolder;
}
h2 {
	display: inline-block;
	text-align: center;
	margin-top: 50px;
	padding: 10px;
	color: white;
	font-size: 25px;
	background-color: #222222;
	width: 
	font-size: 25px;
	border-radius: 10px;
}

@media screen and (max-width: 450px) {

main {
	width: 95%;
}
h1 {
	margin-top: 100px;
	font-size: 20px;
}
h2 {
	font-size: 17px;
}
}

@media screen and (max-width: 330px) {
	.collapse img {
    	width: 90px;
    	height: 50px;
    }
    .nav_item_t {
    	height: 55px;
    	width: 230px;
    }
    .nav_item_t h6 {
    	font-size: 16px;
    }
    .nav_item_j {
    	height: 55px;
    	width: 230px;
    }
    .nav_item_j h6 {
    	font-size: 16px;
    }
    .nav_item_k {
    	height: 55px;
    	width: 230px;
    }
    .nav_item_k h6 {
    	font-size: 16px;
    }
}