Detaillierte Erläuterung verschiedener Methoden zur Implementierung von Trennlinien in CSS

<p class="line_01">小小分隔线 单标签实现</p>

.demo_line_01{
    padding: 0 20px 0;
    margin: 20px 0;
    line-height: 1px;
    border-left: 200px solid #ddd;
    border-right: 200px solid #ddd;
    text-align: center;
}

<p class="line_02"><span>小小分隔线 巧用色实现</span></p>

.demo_line_02{
    height: 1px;
    border-top: 1px solid #ddd;
    text-align: center;
}
.demo_line_02 span{
    position: relative;
    top: -8px;
    background: #fff;
    padding: 0 20px;
}

<p class="line_03"><b></b><span>小小分隔线 inline-block实现</span><b></b></p>

.demo_line_03{
    width:600px;
}
.demo_line_03 b{
    background: #ddd;
    margin-top: 4px;
    display: inline-block;
    width: 180px;
    height: 1px;
    _overflow: hidden;
    vertical-align: middle;
}
.demo_line_03 span{
    display: inline-block;
    width: 220px;
    vertical-align: middle;
}

<p class="line_04"><b></b><span>小小分隔线 浮动来实现</span><b></b></p>

.demo_line_04{
    width:600px;
}
.demo_line_04{
    overflow: hidden;
    _zoom: 1;
}
.demo_line_04 b{
    background: #ddd;
    margin-top: 8px;
    float: left;
    width: 26%;
    height: 1px;
    _overflow: hidden;
}

<p class="line_05">———————————<span>小小分隔线 字符来实现</span>————————————</p>

.demo_line_05{
    letter-spacing: -1px;
    color: #ddd;
}
.demo_line_05 span{
    letter-spacing: 0;
    color: #222;
    margin:0 20px;
}