<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<!-- <link rel="stylesheet" href="19.4.1 -- 适应所有设备的响应式布局.css"> -->
<style>
* {
padding: 0;
margin: 0%;
}
/* PC版 */
#big {
width: 90%;
margin: auto;
}
#head {
width: 100%;
margin: auto;
height: 40px;
display: flex;
justify-content: space-between;
margin-top: 30px;
/* border: 1px solid red; */
}
.head_left {
width: 60%;
background-color: #26424c;
}
.head_right {
width: 30%;
background-color: #26424c;
}
#body {
height: 300px;
background-color: #126c75;
text-align: center;
color: #fff;
line-height: 300px;
font-size: 50px;
margin-top: 30px;
}
#body_buttom {
height: 200px;
/* border: 1px solid pink; */
margin-top: 30px;
display: flex;
}
#body_buttom div {
height: 200px;
background-color: violet;
margin-left: 20px;
flex: auto;
font-size: 50px;
text-align: center;
color: #fff;
line-height: 200px;
}
#body_buttom div:nth-child(1) {
margin-left: 0;
background-color: #429d84;
}
#body_buttom div:nth-child(2) {
background-color: #ac3110;
}
#body_buttom div:nth-child(3) {
background-color: #635e57;
}
#body_buttom div:nth-child(4) {
background-color: #9e4e11;
}
/* ipad版 */
@media screen and (min-width:760px) and (max-width:1000px) {
#head {
height: 60px;
}
#body {
height: 300px;
line-height: 300px;
}
#body_buttom {
height: auto;
width: 100%;
/* border: 1px solid red; */
flex-wrap: wrap;
}
#body_buttom div {
width: 45%;
height: 250px;
line-height: 250px;
margin-left: 20px;
}
#body_buttom div:nth-child(3) {
margin-left: 0;
}
#body_buttom div:nth-child(3),
#body_buttom div:nth-child(4) {
margin-top: 20px;
}
}
/* APP版 */
@media screen and (max-width:420px) {
#head {
height: 40px;
}
#body {
height: 250px;
line-height: 250px;
}
#body_buttom {
height: auto;
width: 100%;
/* border: 1px solid red; */
flex-wrap: wrap;
}
#body_buttom div {
width: 100%;
height: 250px;
line-height: 250px;
/* margin-left: 20px; */
margin-top: 10px;
margin-bottom: 20px;
}
/* #body_buttom div:nth-child(1) {
margin-top: 0px;
} */
#body_buttom div:nth-child(2),
#body_buttom div:nth-child(3),
#body_buttom div:nth-child(4) {
margin-left: 0;
}
}
/* APP版横屏 */
@media screen and (orientation:landscape) and (max-width:667px) {
#body {
height: 100px;
line-height: 100px;
}
#body_buttom {
height: auto;
width: 100%;
/* border: 1px solid red; */
flex-wrap: wrap;
}
#body_buttom div {
width: 24%;
height: 130px;
line-height: 130px;
margin-left: 20px;
}
#body_buttom div:nth-child(4) {
flex: none;
width: 31%;
margin-left: 0;
margin-top: 20px;
}
}
</style>
</head>
<body>
<div id="big">
<div id="head">
<div class="head_left"></div>
<div class="head_right"></div>
</div>
<div id="body"></div>
<div id="body_buttom">
<div></div>
<div></div>
<div></div>
<div></div>
</div>
</div>
</body>
</html>
