这是一款炫酷css3垂直时间轴特效。该css3垂直时间轴特效通过伪元素来制作炫酷的半圆形，所有半圆形连接为一条曲线路径，组成时间轴的线路。
使用方法
在页面中引入bootstrap.min.css文件。
HTML结构
该css3垂直时间轴的HTML结构如下：
Web Desginer
Lorem ipsum dolor sit amet,...
Web Developer
Lorem ipsum dolor sit amet...
CSS样式
为该css3垂直时间轴添加下面的CSS代码。
.main-timeline{
overflow: hidden;
position: relative;
}
.main-timeline .timeline{
position: relative;
margin-top: -79px;
}
.main-timeline .timeline:first-child{ margin-top: 0; }
.main-timeline .timeline:before,
.main-timeline .timeline:after{
content: "";
display: block;
width: 100%;
clear: both;
}
.main-timeline .timeline:before{
content: "";
width: 100%;
height: 100%;
box-shadow: -8px 0 5px -5px rgba(0, 0, 0, 0.5) inset;
position: absolute;
top: 0;
right: 0;
z-index: 2;
}
.main-timeline .timeline-icon{
width: 210px;
height: 210px;
border-radius: 50%;
border: 25px solid transparent;
border-top-color: #f44556;
border-right-color: #f44556;
margin: auto;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
z-index: 1;
transform: rotate(45deg);
}
.main-timeline .year{
display: block;
width: 110px;
height: 110px;
line-height: 110px;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 20px rgba(0,0,0,0.4);
margin: auto;
font-size: 30px;
font-weight: bold;
color: #f44556;
text-align: center;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
transform: rotate(-45deg);
}
.main-timeline .timeline-content{
width: 35%;
float: right;
background: #f44556;
padding: 30px 20px;
margin: 50px 0;
z-index: 1;
position: relative;
}
.main-timeline .timeline-content:before{
content: "";
width: 20%;
height: 15px;
background: #f44556;
position: absolute;
top: 50%;
left: -20%;
z-index: -1;
transform: translateY(-50%);
}
.main-timeline .title{
font-size: 20px;
font-weight: bold;
color: #fff;
margin: 0 0 10px 0;
}
.main-timeline .description{
font-size: 16px;
color: #fff;
line-height: 24px;
margin: 0;
}
.main-timeline .timeline:nth-child(2n):before{ box-shadow: 8px 0 5px -5px rgba(0, 0, 0, 0.5) inset; }
.main-timeline .timeline:nth-child(2n) .timeline-icon{ transform: rotate(-135deg); }
.main-timeline .timeline:nth-child(2n) .year{ transform: rotate(135deg); }
.main-timeline .timeline:nth-child(2n) .timeline-content{ float: left; }
.main-timeline .timeline:nth-child(2n) .timeline-content:before{
left: auto;
right: -20%;
}
.main-timeline .timeline:nth-child(2n) .timeline-icon{
border-top-color: #e97e2e;
border-right-color: #e97e2e;
}
.main-timeline .timeline:nth-child(2n) .year{ color: #e97e2e; }
.main-timeline .timeline:nth-child(2n) .timeline-content,
.main-timeline .timeline:nth-child(2n) .timeline-content:before{ background: #e97e2e; }
.main-timeline .timeline:nth-child(3n) .timeline-icon{
border-top-color: #13afae;
border-right-color: #13afae;
}
.main-timeline .timeline:nth-child(3n) .year{ color: #13afae; }
.main-timeline .timeline:nth-child(3n) .timeline-content,
.main-timeline .timeline:nth-child(3n) .timeline-content:before{ background: #13afae; }
.main-timeline .timeline:nth-child(4n) .timeline-icon{
border-top-color: #105572;
border-right-color: #105572;
}
.main-timeline .timeline:nth-child(4n) .year{ color: #105572; }
.main-timeline .timeline:nth-child(4n) .timeline-content,
.main-timeline .timeline:nth-child(4n) .timeline-content:before{ background: #105572; }
@media only screen and (max-width: 1199px){
.main-timeline .timeline{ margin-top: -103px; }
.main-timeline .timeline-content:before{ left: -18%; }
.main-timeline .timeline:nth-child(2n) .timeline-content:before{ right: -18%; }
}
@media only screen and (max-width: 990px){
.main-timeline .timeline{ margin-top: -127px; }
.main-timeline .timeline-content:before{ left: -2%; }
.main-timeline .timeline:nth-child(2n) .timeline-content:before{ right: -2%; }
}
@media only screen and (max-width: 767px){
.main-timeline .timeline{
margin-top: 0;
overflow: hidden;
}
.main-timeline .timeline:before,
.main-timeline .timeline:nth-child(2n):before{
box-shadow: none;
}
.main-timeline .timeline-icon,
.main-timeline .timeline:nth-child(2n) .timeline-icon{
margin-top: -30px;
margin-bottom: 20px;
position: relative;
transform: rotate(135deg);
}
.main-timeline .year,
.main-timeline .timeline:nth-child(2n) .year{ transform: rotate(-135deg); }
.main-timeline .timeline-content,
.main-timeline .timeline:nth-child(2n) .timeline-content{
width: 100%;
float: none;
border-radius: 0 0 20px 20px;
text-align: center;
padding: 25px 20px;
margin: 0 auto;
}
.main-timeline .timeline-content:before,
.main-timeline .timeline:nth-child(2n) .timeline-content:before{
width: 15px;
height: 25px;
position: absolute;
top: -22px;
left: 50%;
z-index: -1;
transform: translate(-50%,0);
}
}
