1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Title</title> 6 <style> 7 8 .box{ 9 width: 440px; 10 height: 500px; 11 background-color: #ccc; 12 overflow: hidden; 13 position: relative; 14 } 15 .son{ 16 width: 200px; 17 height: 100px; 18 background-color: red; 19 margin: auto; 20 position: absolute; 21 /*定位:参照的是父容器*/ 22 left: 50%; 23 top: 50%; 24 /*偏移:偏移中的百分比参照的是自身*/ 25 /*定位加变化是解决居中垂直对齐问题的神器、*/ 26 transform: translate(-50%,-50%); 27 } 28 </style> 29 </head> 30 <body> 31 <div class="box"> 32 <div class="son"></div> 33 </div> 34 35 </body> 36 </html>
