摘要:
*{ /* 初始化 */ margin: 0; padding: 0; box-sizing: border-box; } body{ height: 100vh; /* 弹性布局 居中显示 */ display: flex; justify-content: center; align-items 阅读全文
摘要:
<!DOCTYPE html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name="viewport" content="width=device-width,in 阅读全文