很简单,首先制作h1-h7字体大小的css定义7个class.c_h1{font-size:28px;}.c_h2{font-size:24px;}.c_h3{font-size:20px;}.c_h4{font-size:16px;}.c_h5{font-size:14px;}.c_h6{font-size:12px;}.c_h7{font-size:11px;}然后容器为