<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> /* css选择器 选中要控制的目标标签 */ div{ color: red; } </style> </head> <body> <div>hello world!</div> </body> </html>
