CSS3 mouse slides over animated line border special effects
Based on CSS property animation, the effect is smooth and flexible
Effect display http://hovertree.com/texiao/css3/32/
Source code download:
http: //hovertree.com/h/bjaf/fo1jlmhi.htm
The rendering is as follows: 
The code is as follows:
<span style="color: #0000ff;"><!</span><span style="color: #ff00ff;">doctype html</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="utf-8"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="renderer"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="webkit"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="X-UA-Compatible"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="IE=Edge"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">name</span><span style="color: #0000ff;">="viewport"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>CSS3鼠标滑过动画线条边框特效 - 何问起<span style="color: #0000ff;"></</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">base </span><span style="color: #ff0000;">target</span><span style="color: #0000ff;">="_blank"</span> <span style="color: #0000ff;">/></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">link </span><span style="color: #ff0000;">rel</span><span style="color: #0000ff;">="stylesheet"</span><span style="color: #ff0000;"> href</span><span style="color: #0000ff;">="http://hovertree.com/texiao/css3/32/css/index.css"</span> <span style="color: #0000ff;">/></span>
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<span style="color: #0000ff;"><</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>想问候不知从何问起<span style="color: #0000ff;"></</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>就直接说喜欢你<span style="color: #0000ff;"></</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>
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<span style="color: #0000ff;"><</span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><</span><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="http://keleyi.com/"</span><span style="color: #0000ff;">></span>
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<span style="color: #0000ff;"><</span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>柯乐义<span style="color: #0000ff;"></</span><span style="color: #800000;">h3</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>木可柯<span style="color: #0000ff;"></</span><span style="color: #800000;">h4</span><span style="color: #0000ff;">></span>
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