!important会提升该条规则的优先级，如果有如下2条规则
.pull-left{color:red !important}.pull-left{color:green}
这样pull-left文字的颜色就是红色
如果不加!important就会被第二条的规则覆盖显示为绿色了
像是用到了.less框架.用了这种框架可以实现一些类似函数和类的概念。
你可以看一下这里的介绍。http://www.bootcss.com/p/lesscss/
首先，我的思路是六边形由一个长方形，两个三角形拼成。
css绘制有边框的三角形，比如你的六边形需要有白色的边框，红色的背景色，那么你的三角形则有白色的大三角形和红色的小三角形重叠在一起，组成一个白色边框的三角形。
之前用before ，after写完无边框的六边形，写有边框的六边形只好推翻这种方法重新写了。。。
我的项目是几个六边形，不规则的摆放，需要定位，给六边形添加hover效果。
最终，六边形画出来之后，PSD是1920的大小，算是高分辨率了，无法自适应不同分辨率的屏幕，还得用rem,我用的是hotcss，不需要自己计算px与rem之间的转换 实现了自适应，hotcss的使用详情请点击这个链接： 点击打开链接。
<div class="nav"><div class="hex-wrap clearfix hex-wrap1">
<div class="hex-border-left hex-border-left1 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore1 pull-left"><a href="javascript: void(0)">农业大数据</a></div>
<div class="hex-border-right hex-border-right1 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap2">
<div class="hex-border-left hex-border-left2 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore2 pull-left"><a href="javascript: void(0)">物联监管</a></div>
<div class="hex-border-right hex-border-right2 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap3">
<div class="hex-border-left hex-border-left3 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore3 pull-left"><a href="javascript: void(0)">畜牧</a></div>
<div class="hex-border-right hex-border-right3 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap4">
<div class="hex-border-left hex-border-left4 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore4 pull-left"><a href="javascript: void(0)">质量溯源</a></div>
<div class="hex-border-right hex-border-right4 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap5">
<div class="hex-border-left hex-border-left5 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore5 pull-left"><a href="javascript: void(0)">病虫害监测</a></div>
<div class="hex-border-right hex-border-right5 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap6">
<div class="hex-border-left hex-border-left6 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore6 pull-left"><a href="javascript: void(0)">水产</a></div>
<div class="hex-border-right hex-border-right6 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap7">
<div class="hex-border-left hex-border-left7 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore7 pull-left"><a href="javascript: void(0)">休闲旅游</a></div>
<div class="hex-border-right hex-border-right7 pull-left">
<div class="hex-right"></div>
</div>
</div>
<div class="hex-wrap clearfix hex-wrap8">
<div class="hex-border-left hex-border-left8 pull-left">
<div class="hex-left"></div>
</div>
<div class="fore fore8 pull-left"><a href="javascript: void(0)">电子商务</a></div>
<div class="hex-border-right hex-border-right8 pull-left">
<div class="hex-right"></div>
</div>
</div>
</div>
css代码：
[css] view plain copy print?
/* 8个导航的样式 */
.content .nav {
float: right
width: 750px
position: relative
}
.hex-wrap {
position: absolute
cursor: pointer
}
.hex-wrap1 {
left: 170px
top: 0px
}
.hex-wrap2 {
left: 90px
top: 148px
}
.hex-wrap3 {
left: 0px
top: 296px
}
.hex-wrap4 {
left: 300px
top: 94px
}
.hex-wrap5 {
left: 215px
top: 242px
}
.hex-wrap6 {
left: 516px
top: 27px
}
.hex-wrap7 {
left: 435px
top: 175px
}
.hex-wrap8 {
left: 348px
top: 323px
}
.fore {
/*绘制一个宽80px,高136px 的长方形*/
width: 80px
height: 136px
text-align: center
position: relative
font-size: 24px
border-top: 1px solid #dfe8f2
border-bottom: 1px solid #dfe8f2
}
.hex-border-left {
position: relative
content: ""
width: 0
height: 0
border-top: 69px solid transparent
border-bottom: 69px solid transparent
}
.hex-left {
/*左边的三角形*/
content: ""
width: 0
height: 0
border-top: 68px solid transparent
border-bottom: 68px solid transparent
position: absolute
left: 1px
top: -68px
}
.hex-border-right {
position: relative
content: ""
width: 0
height: 0
border-top: 69px solid transparent
border-bottom: 69px solid transparent
}
.hex-right {
/*右边的三角形*/
content: ""
width: 0
height: 0
border-top: 68px solid transparent
border-bottom: 68px solid transparent
position: absolute
right: 1px
top: -68px
}
.fore a {
color: #fff
text-decoration: none
cursor: pointer
position: absolute
white-space: nowrap
width: 150px
text-align: center
display: block
top: 50px
left: -35px
z-index: 99
}
.hex-border-left {
border-right: 41px solid #fff
}
.hex-border-right {
border-left: 41px solid #fff
}
.fore1 {
background-color: #3498db
}
.hex-border-left1 .hex-left {
border-right: 40px solid #3498db
}
.hex-border-right1 .hex-right {
border-left: 40px solid #3498db
}
.fore2 {
background-color: #1abc9c
}
.hex-border-left2 .hex-left {
border-right: 40px solid #1abc9c
}
.hex-border-right2 .hex-right {
border-left: 40px solid #1abc9c
}
.fore3 {
background-color: #f1c40f
}
.hex-border-left3 .hex-left {
border-right: 40px solid #f1c40f
}
.hex-border-right3 .hex-right {
border-left: 40px solid #f1c40f
}
.fore4 {
background-color: #9b59b6
}
.hex-border-left4 .hex-left {
border-right: 40px solid #9b59b6
}
.hex-border-right4 .hex-right {
border-left: 40px solid #9b59b6
}
.fore5 {
background-color: #95a5a6
}
.hex-border-left5 .hex-left {
border-right: 40px solid #95a5a6
}
.hex-border-right5 .hex-right {
border-left: 40px solid #95a5a6
}
.fore6 {
background-color: #e74c3c
}
.hex-border-left6 .hex-left {
border-right: 40px solid #e74c3c
}
.hex-border-right6 .hex-right {
border-left: 40px solid #e74c3c
}
.fore7 {
background-color: #2ecc71
}
.hex-border-left7 .hex-left {
border-right: 40px solid #2ecc71
}
.hex-border-right7 .hex-right {
border-left: 40px solid #2ecc71
}
.fore8 {
background-color: #e67e22
}
.hex-border-left8 .hex-left {
border-right: 40px solid #e67e22
}
.hex-border-right8 .hex-right {
border-left: 40px solid #e67e22
}
.hex-wrap1:hover .fore1 {
background-color: #39B0FF
border-top: 1px solid #39B0FF
border-bottom: 1px solid #39B0FF
}
.hex-wrap1:hover .hex-border-left1 {
border-right: 41px solid #39B0FF
}
.hex-wrap1:hover .hex-border-right1 {
border-left: 41px solid #39B0FF
}
.hex-wrap1:hover .hex-left {
border-right: 40px solid #39B0FF
}
.hex-wrap1:hover .hex-right {
border-left: 40px solid #39B0FF
}
