.accordion-toggle:after {
				/* symbol for "opening" panels */
				font-family: 'Glyphicons Halflings';  /* essential for enabling glyphicon */
				content: "\e114";    /* adjust as needed, taken from bootstrap.css */
				float: right;        /* adjust as needed */
				color: grey;         /* adjust as needed */
			}
			.accordion-toggle.collapsed:after {
				/* symbol for "collapsed" panels */
				content: "\e080";    /* adjust as needed, taken from bootstrap.css */
			}

#maytinh{
    background-color: yellow;
}
#dell{
    background-color: yellow;

}
.container{
	padding: 0 !important;
}
#images:hover{
	
		box-shadow: 3px 3px 10px;
	}
.footer{
	height:px;color:white;background:#1890FF;margin-top:40px;margin: auto;
}
#images{
width:100%;border-radius:10px;margin-left: auto;margin-right: auto;display: block;
}
.infor{
	background:#f5ffff;padding:10px;border-radius:10px;border:1px #dedede solid;
}
  
 
	table {
	

	margin-top:0px;
    border: 0px solid #1890FF;
    border-collapse: collapse;

}

td {
    border: none;
	

}
#gioithieu{
letter-spacing: 0.5px;
}
.panel {
    border: 1px solid #f4511e; 
    border-radius:0 !important;
    transition: box-shadow 0.5s;
  }
  .panel:hover {
    box-shadow: 5px 0px 40px rgba(0,0,0, .2);
  }
  .panel-footer .btn:hover {
    border: 1px solid #f4511e;
    background-color: #fff !important;
    color: #f4511e;
  }
  @media screen and (max-width: 768px) {
    .col-sm-4 {
      text-align: center;
      margin: 25px 0;
    }
  }
 
  #acer{
		padding-top:45px;
	}
	#asus{
		padding-top:45px;
	}
	#dell{
		padding-top:45px;
	}
	#gaming{
		padding-top:45px;
	}
	#hp{
		padding-top:45px;
	}
	#lenovo{
		padding-top:45px;
	}
	#msi{
		padding-top:45px;
	}
	
	.menu{
		width: 100%;
        margin-bottom: 100px;
  position: fixed; /*Cho menu cố định 1 vị trí với top và left*/
  top: 0; /*Nằm trên cùng*/
  left: 0; /*Nằm sát bên trái*/
  z-index: 100000; /*Hiển thị lớp trên cùng*/
	}
	@-webkit-keyframes my {
	 0% { color: yellow; } 
	 50% { color: #fff;  } 
	 100% { color: yellow;  } 
 }
 @-moz-keyframes my { 
	 0% { color: yellow;  } 
	 50% { color: #fff;  }
	 100% { color: yellow;  } 
 }
 @-o-keyframes my { 
	 0% { color: yellow; } 
	 50% { color: #fff; } 
	 100% { color: yellow;  } 
 }
 @keyframes my { 
	 0% { color: yellow;  } 
	 50% { color: #fff;  }
	 100% { color: yellow;  } 
 } 

 .test {
        
	 -webkit-animation: my 700ms infinite;
	 -moz-animation: my 700ms infinite; 
	 -o-animation: my 700ms infinite; 
	 animation: my 700ms infinite;
}