全部代码如下（最后提供了文件下载）：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>8款纯CSS3搜索框</title> <link href="http://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"> <style> * { box-sizing: border-box; } body { margin: 0; padding: 0; background: #494A5F; font-weight: 500; font-family: "Microsoft YaHei","宋体","Segoe UI", "Lucida Grande", Helvetica, Arial,sans-serif, FreeSans, Arimo; } #container { width: 500px; height: 820px; margin: 0 auto; } div.search {padding: 30px 0;} form { position: relative; width: 300px; margin: 0 auto; } input, button { border: none; outline: none; } input { width: 100%; height: 42px; padding-left: 13px; } button { height: 42px; width: 42px; cursor: pointer; position: absolute; } /*搜索框1*/ .bar1 {background: #A3D0C3;} .bar1 input { border: 2px solid #7BA7AB; border-radius: 5px; background: #F9F0DA; color: #9E9C9C; } .bar1 button { top: 0; right: 0; background: #7BA7AB; border-radius: 0 5px 5px 0; } .bar1 button:before { content: "f002"; font-family: FontAwesome; font-size: 16px; color: #F9F0DA; } /*搜索框2*/ .bar2 {background: #DABB52;} .bar2 input, .bar2 button { border-radius: 3px; } .bar2 input { background: #F9F0DA; } .bar2 button { height: 26px; width: 26px; top: 8px; right: 8px; background: #F15B42; } .bar2 button:before { content: "f105"; font-family: FontAwesome; color: #F9F0DA; font-size: 20px; font-weight: bold; } /*搜索框3*/ .bar3 {background: #F9F0DA;} .bar3 form {background: #A3D0C3;} .bar3 input, .bar3 button { background: transparent; } .bar3 button { top: 0; right: 0; } .bar3 button:before { content: "f002"; font-family: FontAwesome; font-size: 16px; color: #F9F0DA; } /*搜索框4*/ .bar4 {background: #F15B42;} .bar4 form { background: #F9F0DA; border-bottom: 2px solid #BE290E; } .bar4 input, .bar4 button { background: transparent; } .bar4 button { top: 0; right: 0; } .bar4 button:before { content: "f178"; font-family: FontAwesome; font-size: 20px; color: #be290e; } /*搜索框5*/ .bar5 {background: #683B4D;} .bar5 input, .bar5 button { background: transparent; } .bar5 input { border: 2px solid #F9F0DA; } .bar5 button { top: 0; right: 0; } .bar5 button:before { content: "f002"; font-family: FontAwesome; font-size: 16px; color: #F9F0DA; } .bar5 input:focus { border-color: #311c24 } /*搜索框6*/ .bar6 {background: #F9F0DA;} .bar6 input { border: 2px solid #c5464a; border-radius: 5px; background: transparent; top: 0; right: 0; } .bar6 button { background: #c5464a; border-radius: 0 5px 5px 0; width: 60px; top: 0; right: 0; } .bar6 button:before { content: "搜索"; font-size: 13px; color: #F9F0DA; } /*搜索框7*/ .bar7 {background: #7BA7AB;} .bar7 form { height: 42px; } .bar7 input { width: 250px; border-radius: 42px; border: 2px solid #324B4E; background: #F9F0DA; transition: .3s linear; float: right; } .bar7 input:focus { width: 300px; } .bar7 button { background: none; top: -2px; right: 0; } .bar7 button:before{ content: "f002"; font-family: FontAwesome; color: #324b4e; } /*搜索框8*/ .bar8 {background: #B46381;} .bar8 form { height: 42px; } .bar8 input { width: 0; padding: 0 42px 0 15px; border-bottom: 2px solid transparent; background: transparent; transition: .3s linear; position: absolute; top: 0; right: 0; z-index: 2; } .bar8 input:focus { width: 300px; z-index: 1; border-bottom: 2px solid #F9F0DA; } .bar8 button { background: #683B4D; top: 0; right: 0; } .bar8 button:before { content: "f002"; font-family: FontAwesome; font-size: 16px; color: #F9F0DA; } </style></head><body><div id="container"> <div class="search bar1"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar2"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar3"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar4"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar5"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar6"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar7"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div> <div class="search bar8"> <form> <input type="text" placeholder="请输入您要搜索的内容..."> <button type="submit"></button> </form> </div></div></body></html>
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