body,h1,h2,h3,ul {
				margin: 0;
				padding: 0;
			}
			.w {
				width: 980px;
				margin: 0 auto;
				/*background-color: #666;*/
			}
			a {
				text-decoration: none;
			}
			.aunderline {
				text-decoration: underline;
			}
			
			li {
				list-style: none;
			}
			.fl {
				float: left;
			}
			.fr {
				float: right;
			}
			.clearfix {
				* zoom: 0;
			}
			.clearfix:after {
				content: "";
				display: block;
				visibility: hidden;
				height: 0;
				clear: both;
			}
			/*header 部分*/
			.top-nav {
				height: 50px;
				background-color: #21234b;
				width: 100%;
				position: fixed;
                                top: 0;
                                z-index: 999;
	
			}
			.header .logo {
				border:  1px solid gray;
				height: 35px;
				width: 35px;
				background: url(https://www.cnblogs.com/images/cnblogs_com/-news-Wjh/1366574/o_151-1G129102H0.jpg) no-repeat center;
				background-size: auto 35px;
				border-radius: 10%;
                                transition: all 1s;
			}
                       .header .logo:hover {
                                border: none;
                                border-radius: 50%;
                                border:  1px solid orange;
                                transform: rotate(360deg) scale(1.3);
                       }
			.header h1 {
				color: #fff;
				font-size: 20px;
				display: inline-block;
				vertical-align: middle;
				line-height: 50px;
			}
			.header .title {
				margin-left: 5px;
			}

			/*banner*/
			.banner {
				height: 140px;
			}
#blogTitle h1 a {
display: none;
}
body{
background: url(https://www.cnblogs.com/images/cnblogs_com/-news-Wjh/1366574/o_151-1G129102H0.jpg) top center no-repeat  fixed #000;
}
.banner{height: 80px;}