width: fit-content;
font-size:20px;
color:red;
font-weight:bold;
border:1px solid red;
font-family:"宋体";
font-style:italic;
text-decoration:underline;
text-decoration:line-through;
text-indent:2em;
line-height:1.5em;
letter-spacing:50px;
word-spacing:50px;
text-align:center; right ; left ;
display:inline-flex;
display:block;
display:inline;
display:inline-block;
word-break:keep-all;
white-space:nowrap;
vertical-align:middle;
border-style(边框样式)常见样式有: (border-color,border-width) 边框相关设置
dashed(虚线)| dotted(点线)| solid(实线)。
border-bottom border-top border-right border-left 上下左右线单独设置
box-sizing: border-box; //当使用padding的时候不影响大小
padding-top padding-right padding-bottom padding-left
margin-top margin-right margin-bottom margin-left (margin:10px 10px 10px 10px; top、right、bottom、left)



