hr.style-one {
/*内嵌水平线*/
width:80%;
margin:0 auto;
border: 0;
height: 0;
border-top: 1px solid rgba(0, 0, 0, 0.1);
border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
hr.style-two {
/*透明渐变水平线*/
width:80%;
margin:0 auto;
border: 0;
height: 1px;
background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0));
}
hr.style-three{
/*渐变*/
width:80%;
margin:0 auto;
border: 0;
height: 1px;
background: #333;
background-image: linear-gradient(to right, #ccc, #333, #ccc);
}