css 使用rem进行全局尺寸调整;使用em进行本地大小调整

Posted 2021-05-13

article {    
    font-size: 1.25rem;  
}    
aside {    
    font-size: .9rem;  
}

/* Then set the font size for textual elements to em:  */
h2 {    
    font-size: 2em;  
}    
p {    
    font-size: 1em;  
}

/* Now each containing element becomes compartmentalized and easier to style, more maintainable, and flexible.

 */