HTML的标题样式

<p>
<span style="
     text-align: center; 
     padding-bottom: 6px; 
     padding-left: 20px; 
     padding-right: 500px; 
     color: #800080; 
     padding-top: 6px;
     box-shadow: 10px 10px 5px #888888;"
><strong>
<span style="font-size: 18px;">标题样式1</span></strong></span></p>

<p>
<span style="
     text-align: center; 
     padding-bottom: 6px; 
     background-color: #99ccff; 
     padding-left: 20px; 
     padding-right: 500px; 
     color: #0000ff; 
     padding-top: 6px; 
     box-shadow: 10px 10px 5px #888888;"
><strong><span style="font-size: 18px;">标题样式2</span></strong></span></p>