.navbar-header {
    float: none;
    background-image: url("/img/bg_image.png");
    width: 100%;
  		background-size: cover; /* 背景图片覆盖整个元素 */
			background-repeat: no-repeat; /* 背景图片不重复 */
			background-position: center; /* 背景图片居中 */
}
.navbar-default .navbar-collapse, .navbar-default .navbar-form {
    float: left!important;
    background: #fff;
 			width: 100%;
}
.logo-a{
	float: none;			
}
.logo-a img{
	width: 100%;	
}
.navbar.navbar-default {
    background-color: #f1f1f1;
}
#header {
	position: relative;
}
.pb-content {
    margin-top: 0;
}
.pb-main {
	margin-top: 0;  
}
.pb-sidebar{
	margin-top: 0;
}
.navbar-default .navbar-toggle{display: none;}
/* 针对PC端 */
@media screen and (min-width: 769px) {
	.logo-a img {
	    min-height: 150px;
	}	
	.navbar-nav li a{
		font-size: 28px;
	}
}
@media screen and (max-width: 768px) {	
	.pb-container .collapse{
		display: block;
	}
  	.pb-container .collapse .navbar-nav{
  		display: flex;
  			flex-wrap: wrap;
  	}	  
  	.navbar-nav li a {
	    padding: 15px 3px;
	}		
	.logo-a img {
	    min-height: 80px;
	}	
}