1.\u6982\u5ff5<\/h3>\n\n- \u4f5c\u7528：\u662f\u9009\u4e2d\u7279\u6b8a\u72b6\u6001\u7684\u5143\u7d20<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143957-689b523de756c.png\")
<\/p>\n
\n
2.\u52a8\u6001\u9009\u62e9\u5668（\u7528\u6237\u4ea4\u4e92）<\/h3>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143958-689b523e3d5fb.png\")
<\/p>\n
\n
\u6ce8\u610f\u987a\u5e8f：link（\u672a\u8fde\u63a5），visited（\u5df2\u8bbf\u95ee），hover（\u60ac\u505c），active（\u6fc0\u6d3b）<\/span><\/p>\n\u5bf9\u4e8e\u4e00\u4e2a\u672a\u8bbf\u95ee\u7684\u8d85\u94fe\u63a5，\u5904\u4e8elink，\u7136\u540e\u9f20\u6807\u60ac\u6d6e（hover），\u70b9\u51fb\u6fc0\u6d3b（active），\u6700\u540e\u5904\u4e8e\u5df2\u8bbf\u95ee（visited）<\/p>\n
visited\u4e0d\u80fd\u5199\u5728\u6700\u540e，\u4e0d\u7136，\u540e\u6765\u8005\u5c45\u4e0a，\u4e0d\u4f1a\u51fa\u73b0\u60ac\u6d6e\u548c\u6fc0\u6d3b\u72b6\u6001（\u88ab\u8986\u76d6）<\/p>\n
<!DOCTYPE html>
\n<html lang="zh-CN">
\n<head>
\n <meta charset="UTF-8">
\n <title>\u4f2a\u7c7b\u9009\u62e9\u5668<\/title>
\n <style><\/p>\n
\/* \u8bbf\u95ee\u8fc7a\u5143\u7d20，\u989c\u8272\u4e5f\u4e0d\u4f1a\u6539\u53d8
\n <a href="hhtps:\/\/www.baidu.com">\u53bb\u767e\u5ea6<\/a>
\n *\/
\n \/* \u524d\u63d0\u662fa\u6807\u7b7e\u7684target\u5c5e\u6027\u662f_self，\u5728\u8be5\u9875\u9762\u8df3\u8f6c *\/
\n \/* link\u548cvisited\u662f\u8d85\u94fe\u63a5\u7279\u6709\u7684 *\/
\n \/* \u9009\u4e2d\u6ca1\u6709\u8bbf\u95ee\u8fc7\u7684a\u5143\u7d20 *\/
\n a:link{
\n color:chocolate;
\n }
\n \/* \u9009\u4e2d\u8bbf\u95ee\u8fc7\u7684a\u5143\u7d20 *\/
\n a:visited{
\n color:grey;
\n }
\n \/* \u9009\u4e2d\u9f20\u6807\u60ac\u6d6e\u7684a\u5143\u7d20 *\/
\n a:hover{
\n color: cadetblue;
\n }
\n \/* \u9009\u4e2d\u6fc0\u6d3b（\u9f20\u6807\u70b9\u51fb\u4e0d\u677e\u624b）\u72b6\u6001\u7684a\u5143\u7d20 *\/
\n a:active{
\n color: blue;
\n }
\n \/* \u8fd9\u56db\u4e2a\u6709\u987a\u5e8f：link visited hover active *\/
\n \/* hover\u4e0eactive\u53ef\u4ee5\u7528\u4e8e\u5176\u4ed6\u5143\u7d20，\u4f8b\u5982p，span\u7b49\u7b49 *\/
\n p:hover{
\n color: blueviolet;
\n }
\n \/* \u83b7\u53d6\u7126\u70b9（\u53ea\u6709\u8868\u5355\u5143\u7d20\u624d\u80fd\u4f7f\u7528focus\u4f2a\u7c7b） *\/
\n input:focus{
\n \/* \u8f93\u5165\u6587\u5b57\u989c\u8272\u53d8\u6210\u84dd\u8272 *\/
\n color: blue;
\n }
\n select:focus{
\n color: aqua;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <a href="https:\/\/www.baidu.com" >\u53bb\u767e\u5ea6<\/a>
\n <a href="https:\/\/www.jd.com" >\u53bb\u4eac\u4e1c<\/a>
\n <br>
\n <p>\u524d\u7aef<\/p>
\n <!– \u8f93\u5165\u6846 –>
\n <input type="text">
\n <br>
\n <!– \u4e0b\u62c9\u6846 –>
\n <select name="age" >
\n <option value="under 18">18\u4ee5\u4e0b<\/option>
\n <option value="18-25">18-25\u5c81<\/option>
\n <option value="26-35">26-35\u5c81<\/option>
\n <\/select>
\n<\/body>
\n<\/html> <\/p>\n
3.\u7ed3\u6784\u4f2a\u7c7b<\/h3>\n
-child \u57fa\u4e8e\u5176\u7236\u5143\u7d20\u7684\u6240\u6709\u5b50\u4ee3\u5143\u7d20；-of-type \u57fa\u4e8e\u5176\u7236\u5143\u7d20\u7684\u6240\u6709\u540c\u7c7b\u578b\u7684\u5b50\u4ee3\u5143\u7d20<\/span><\/p>\n：first-child：\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a<\/h4>\n
:first-child \u4f2a\u7c7b\u4e0e\u6307\u5b9a\u7684\u5143\u7d20\u5339\u914d：\u8be5\u5143\u7d20\u662f\u53e6\u4e00\u4e2a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143958-689b523ebddcc.png\")
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143958-689b523ee2759.png\")
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143959-689b523f408e3.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143959-689b523fec2e5.png\")
<\/p>\n
<!DOCTYPE html>
\n<html lang="zh-CN">
\n<head>
\n <meta charset="UTF-8">
\n <title>\u7ed3\u6784\u4f2a\u7c7b01<\/title>
\n <style>
\n \/* \u540e\u4ee3\u9009\u62e9\u5668：\u9009\u4e2ddiv\u540e\u4ee3（\u513f\u5b50，\u5b59\u5b50，\u3002\u3002）p\u5143\u7d20(\u5728div\u6240\u6709\u5b50\u5143\u7d20\u4e2d\u627e)，p\u5143\u7d20\u7684\u7236\u4eb2\u662f\u8c01\u65e0\u6240\u8c13，\u4f46\u662fp\u5fc5\u987b\u662f\u5176\u7236\u4eb2\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50\u2014\u2014\u7ed3\u67843 *\/
\n \/* main\u7684p\u5143\u7d20\u53d8\u8272，\u5b83\u662fdiv\u7684\u5b59\u5b50，\u662f\u540e\u4ee3\u5143\u7d20，\u662f\u7b2c\u4e00\u4e2a *\/
\n div p:first-child{
\n color: blue;
\n }
\n \/* \u9009\u4e2dp\u5143\u7d20，p\u5143\u7d20\u7684\u7236\u4eb2\u662f\u8c01\u65e0\u6240\u8c13，\u4f46\u662fp\u5fc5\u987b\u662f\u5176\u7236\u4eb2\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50\u2014\u2014\u7ed3\u67843 *\/
\n \/* \u540c\u65f6\u5b9a\u4e49\u4e86div p:first-child\u548cp:first-child\u4e24\u4e2a\u9009\u62e9\u5668，\u524d\u8005\u5177\u6709\u66f4\u9ad8\u7684\u7279\u5f02\u6027（\u56e0\u4e3a\u5b83\u66f4\u5177\u4f53），\u6240\u4ee5\u5373\u4f7f\u4e24\u4e2a\u89c4\u5219\u90fd\u5339\u914d，\u84dd\u8272\u7684\u89c4\u5219\u4f1a\u8986\u76d6\u7ea2\u8272\u7684\u89c4\u5219\u3002 *\/
\n p:first-child{
\n color: red;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <!– \u7ed3\u67843 –>
\n <div>
\n <p>\u5f00\u53d1<\/p>
\n <!– main\u8868\u793a\u4e3b\u8981\u5185\u5bb9 –>
\n <main>
\n <p>\u5f20\u4e09：98<\/p>
\n <\/main>
\n <!– div\u7684\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20 –>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>\u8d75\u516d：68<\/p>
\n <\/div><\/p>\n
<\/body>
\n<\/html><\/p>\n
：last-child：\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a<\/h4>\n
\/* \u9009\u4e2ddiv\u7684\u6700\u540e\u4e00\u4e2a\u513f\u5b50\u5143\u7d20（\u6309\u7167\u6240\u6709\u5144\u5f1f\u8ba1\u7b97）\u2014\u2014\u7ed3\u67841 *\/
\n div > p:last-child{
\n color: red;
\n }<\/p>\n
<!– \u7ed3\u67841 –>
\n <div>
\n <p >\u5f20\u4e09：98<\/p>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>
\n \u8d75\u516d：68
\n <span>99<\/span>
\n <\/p>
\n <\/div> <\/p>\n
\u9009\u62e9\u5668\u62c6\u89e3<\/p>\n
\n- div > p———-\u9009\u62e9\u6240\u6709\u76f4\u63a5\u5b50\u7ea7\u7684 <p> \u5143\u7d20（\u5fc5\u987b\u662f <div> \u7684\u76f4\u63a5\u5b50\u5143\u7d20）\u3002<\/li>\n<\/ul>\n
\n- :last-child————\u8fdb\u4e00\u6b65\u7b5b\u9009\u8fd9\u4e9b <p> \u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20（\u76f8\u5bf9\u4e8e\u5176\u7236\u5143\u7d20 <div>）<\/li>\n<\/ul>\n
\n- \u5982\u679c <div> \u7684\u6700\u540e\u4e00\u4e2a\u662f\u5176\u4ed6\u5143\u7d20（\u5982 <span>），\u5219\u4e0d\u4f1a\u5339\u914d\u4efb\u4f55 <p>\u3002<\/li>\n<\/ul>\n
：nth-child（n）：\u9009\u62e9\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u7b2cn\u4e2a<\/h4>\n
n\u7684\u53d6\u503c\u8303\u56f4：0\u5230\u6b63\u65e0\u7a77<\/p>\n
\n- \u51990，\u4e0d\u9009\u4e2d<\/li>\n
- \u5199n，\u5168\u9009\u4e2d（\u4e0d\u7528）<\/li>\n
- 2*n，\u6216\u8005even：\u9009\u4e2d\u5076\u6570\u5143\u7d20<\/li>\n
- 2*n+1，\u6216\u8005odd：\u9009\u4e2d\u5947\u6570\u5143\u7d20<\/li>\n
- \u5fc5\u987b\u5199<\/li>\n<\/ul>\n
n\u7684\u53d6\u503c\u5f62\u5f0f：a*x+b<\/p>\n
\n- \u53ef\u4ee5\u5199\u6570\u5b57（a=0），\u9009\u4e2d\u5355\u4e2a；\u4f46\u662f\u4e0d\u8981\u8d85\u8fc7\u5144\u5f1f\u5143\u7d20\u4e2a\u6570<\/li>\n
- \u53ef\u4ee5\u5199\u8868\u8fbe\u5f0f（\u56fa\u5b9a\u683c\u5f0fa*x+b），\u8fdb\u884c\u4e00\u5b9a\u8303\u56f4\u9009\u4e2d<\/li>\n
- \u4f8b\u5982，\u53ef\u4ee5\u5199-n+5，\u9009\u4e2d\u524d5\u4e2a（n\u7684\u503c\u4ece0\u5f00\u59cb\u904d\u5386，\u5230n\u4e3a5\u7ed3\u675f），\u4f46\u662f\u4e0d\u80fd\u51995-n<\/li>\n<\/ul>\n
\/*\u9009\u4e2ddiv\u7684\u7b2cn\u4e2a\u513f\u5b50p
\n \u5143\u7d20（\u6309\u7167\u6240\u6709\u5144\u5f1f\u8ba1\u7b97）\u2014\u2014\u7ed3\u67841 *\/
\n div > p:nth-child(3){
\n color: blue;
\n } <\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144000-689b5240ecc40.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144001-689b52418a132.png\")
<\/p>\n
\u6ce8\u610f：\u5b83\u57fa\u4e8e\u7236\u5143\u7d20\u4e2d\u7684\u6240\u6709\u5b50\u5143\u7d20\u6765\u8ba1\u7b97\u7684，\u800c\u4e0d\u4ec5\u4ec5\u662f\u7279\u5b9a\u7c7b\u578b\u7684\u5b50\u5143\u7d20\u3002\u5b83\u4f1a\u6309\u7167\u5b50\u5143\u7d20\u7684\u987a\u5e8f\u8fdb\u884c\u7f16\u53f7，\u7136\u540e\u6839\u636e\u9009\u62e9\u5668\u7684\u89c4\u5219\u6765\u9009\u62e9\u5143\u7d20\u3002<\/p>\n
\n- nth-child(-n+4) \u7684\u610f\u601d\u662f\u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u524d 4 \u4e2a\u5b50\u5143\u7d20（\u5305\u62ec\u6240\u6709\u7c7b\u578b\u7684\u5b50\u5143\u7d20，\u800c\u4e0d\u4ec5\u4ec5\u662f <p> \u5143\u7d20<\/li>\n<\/ul>\n
\n- \n
\n- \u7b2c 1 \u4e2a\u5b50\u5143\u7d20\u662f <span>\u3002<\/li>\n
- \u7b2c 2 \u4e2a\u5b50\u5143\u7d20\u662f\u7b2c\u4e00\u4e2a <p>（\u5f20\u4e09）\u3002<\/li>\n
- \u7b2c 3 \u4e2a\u5b50\u5143\u7d20\u662f\u7b2c\u4e8c\u4e2a <p>（\u674e\u56db）\u3002<\/li>\n
- \u7b2c 4 \u4e2a\u5b50\u5143\u7d20\u662f\u7b2c\u4e09\u4e2a <p>（\u738b\u4e94）\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u56e0\u6b64，nth-child(-n+4) \u4f1a\u9009\u62e9\u8fd9 4 \u4e2a\u5b50\u5143\u7d20，\u4f46\u53ea\u6709\u5176\u4e2d\u7684 <p> \u5143\u7d20\u4f1a\u5e94\u7528\u6837\u5f0f\u3002<\/p>\n
\u5e0c\u671b\u9009\u62e9\u524d 4 \u4e2a <p> \u5143\u7d20，\u800c\u4e0d\u662f\u524d 4 \u4e2a\u5b50\u5143\u7d20，\u5e94\u8be5\u4f7f\u7528 nth-of-type，\u800c\u4e0d\u662f nth-child\u3002<\/p>\n
<!– \u9009\u4e2ddiv\u7684\u7b2c4,3,2,1\u4e2a\u5b50\u4ee3p\u5143\u7d20（\u5148\u627e\u5b50\u4ee3\u5143\u7d20） –>
\ndiv > p:nth-child(-n+4){
\n background-color: burlywood;
\n }<\/p>\n
<div>
\n <span>\u6d4b\u8bd5<\/span> <!– \u7b2c\u4e00\u4e2a\u5b50\u4ee3\u5143\u7d20 –>
\n <p>\u5f20\u4e09：98<\/p>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>\u8d75\u516d：68<\/p>
\n<\/div>
\n<!–\u5728\u8fd9\u4e2a\u7ed3\u6784\u4e2d，<span> \u662f\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20，\u800c <p> \u5143\u7d20\u662f\u4ece\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20\u5f00\u59cb\u7684\u3002 –> <\/p>\n
：first-of-type：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a<\/h4>\n
\u9009\u4e2ddiv\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n
\n- \u9009\u4e2ddiv\u7684\u7b2c\u4e00\u4e2a\u540c\u7c7b\u578b（p\u5143\u7d20）\u7684（\u72b6\u6001）\u5b50\u4ee3p\u5143\u7d20<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144002-689b524232b67.png\")
<\/p>\n
：last-of-type：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a<\/h4>\n
\u9009\u4e2ddiv\u7684\u6700\u540e\u4e00\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n
\n- \u9009\u4e2ddiv\u7684\u6700\u540e\u4e00\u4e2a\u540c\u7c7b\u578b（p\u5143\u7d20）\u7684（\u72b6\u6001）\u5b50\u4ee3p\u5143\u7d20<\/li>\n
- \u53ea\u627e\u540c\u7c7b\u578b\u7684p\u5143\u7d20<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144003-689b524340957.png\")
<\/p>\n
：nth-of-type（n）：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u7b2cn\u4e2a<\/h4>\n
nth-of-type \u662f\u57fa\u4e8e\u7279\u5b9a\u7c7b\u578b\u7684\u5b50\u5143\u7d20\u6765\u8ba1\u7b97\u7684，\u800c\u4e0d\u662f\u6240\u6709\u5b50\u5143\u7d20\u3002<\/p>\n
\u9009\u4e2ddiv\u7684\u7b2cn\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n
\n- \u9009\u4e2ddiv\u7684\u7b2cn\u4e2a\u540c\u7c7b\u578b（p\u5143\u7d20）\u7684（\u72b6\u6001）\u5b50\u4ee3p\u5143\u7d20<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144003-689b52439a6a0.png\")
<\/p>\n
\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144004-689b52448c973.png\")
<\/p>\n
\n\n\n\n\u9009\u62e9\u5668<\/p>\n<\/td>\n
\n\u4f5c\u7528<\/p>\n<\/td>\n
\n\u5f53\u524d\u793a\u4f8b\u5339\u914d\u7ed3\u679c<\/p>\n<\/td>\n<\/tr>\n
\n\ndiv > p:last-child<\/p>\n<\/td>\n
\n\u9009\u62e9\u4f5c\u4e3a\u7236\u5143\u7d20\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20\u7684\u76f4\u63a5 <p><\/p>\n<\/td>\n
\n<p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n
\n\ndiv p:last-of-type<\/p>\n<\/td>\n
\n\u9009\u62e9\u7236\u5143\u7d20\u5185\u540c\u7c7b\u578b\u7684\u6700\u540e\u4e00\u4e2a <p><\/p>\n<\/td>\n
\n<p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n
\n\ndiv > p:last-of-type<\/p>\n<\/td>\n
\n\u540c :last-of-type<\/p>\n
，\u4f46\u4ec5\u9650\u76f4\u63a5\u5b50\u7ea7<\/p>\n<\/td>\n
\n<p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.\u5426\u5b9a\u4f2a\u7c7b（\u4f5c\u6392\u9664）<\/h3>\n\n- \u4f5c\u7528：\u6392\u9664\u6ee1\u8db3\u62ec\u53f7\u4e2d\u6761\u4ef6\u7684\u5143\u7d20<\/li>\n
- \u8bed\u6cd5：not（\u9009\u62e9\u5668）{<\/li>\n<\/ul>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5c5e\u6027\u540d：\u5c5e\u6027\u503c<\/p>\n
}<\/p>\n
\u62ec\u53f7\u91cc\u53ef\u4ee5\u662f\u7c7b\u9009\u62e9\u5668，\u5c5e\u6027\u9009\u62e9\u5668，id\u9009\u62e9\u5668，\u7ed3\u6784\u9009\u62e9\u5668\u7b49\u7b49<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144005-689b524542902.png\")
<\/p>\n
\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h4>\n(1) \u8868\u5355\u63a7\u4ef6\u6392\u9664<\/h5>\n
\/* \u4e3a\u6240\u6709\u975e\u9690\u85cf\u8f93\u5165\u6846\u6dfb\u52a0\u8fb9\u6846 *\/
\ninput:not([type="hidden"]) {
\n border: 1px solid #ccc;
\n} <\/p>\n
(2) \u5bfc\u822a\u83dc\u5355\u9ad8\u4eae<\/h5>\n
\/* \u5f53\u524d\u9875\u9762\u83dc\u5355\u9879\u4e0d\u52a0\u7c97 *\/
\n.nav-item:not(.active) {
\n font-weight: normal;
\n} <\/p>\n
(3) \u5217\u8868\u6837\u5f0f\u63a7\u5236<\/h5>\n
\/* \u6700\u540e\u4e00\u9879\u4e0d\u52a0\u4e0b\u5212\u7ebf *\/
\nli:not(:last-child) {
\n border-bottom: 1px solid #eee;
\n} <\/p>\n
(4) \u65e0\u969c\u788d\u4f18\u5316<\/h5>\n
\/* \u975e\u7981\u7528\u6309\u94ae\u60ac\u505c\u6548\u679c *\/
\nbutton:not([disabled]):hover {
\n background-color: #555;
\n} <\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/p>\n
\u4e0d\u652f\u6301\u5d4c\u5957 :not()<\/p>\n
\/* \u65e0\u6548\u5199\u6cd5 *\/
\n:not(:not(p)) {} <\/p>\n
\u4e0d\u80fd\u5305\u542b\u4f2a\u5143\u7d20<\/p>\n
\/* \u65e0\u6548\u5199\u6cd5 *\/
\n:not(::before) {} <\/p>\n
\u4f18\u5148\u7ea7\u8ba1\u7b97 :not() \u7684\u4f18\u5148\u7ea7\u7531\u5176\u53c2\u6570\u51b3\u5b9a\u3002\u4f8b\u5982：<\/p>\n
\n- :not(.class) \u7684\u4f18\u5148\u7ea7 = \u7c7b\u9009\u62e9\u5668（10）<\/li>\n
- :not(#id) \u7684\u4f18\u5148\u7ea7 = ID \u9009\u62e9\u5668（100）<\/li>\n<\/ul>\n
5.UI\u9009\u62e9\u5668<\/h3>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144006-689b5246d2125.png\")
<\/p>\n
\u9009\u4e2d\u5c31\u53d8\u5927，\u4e0d\u9009\u4e2d\u5c31\u4fdd\u6301\u539f\u72b6；<\/p>\n
focus\u662f\u9009\u4e2d\u53d8\u5927，\u53d6\u6d88\u9009\u4e2d\u4e0d\u53d8\u56de\u539f\u72b6<\/p>\n
<!DOCTYPE html>
\n<html lang="en">
\n<head>
\n <meta charset="UTF-8">
\n <title>Document<\/title>
\n <style>
\n \/* \u9009\u4e2d\u7684\u662f\u52fe\u9009\u5f97\u590d\u9009\u6846\u6216\u8005\u5355\u9009\u6846（\u4e0d\u80fd\u5199\u989c\u8272\u7684\u6837\u5f0f） *\/
\n input:checked{
\n width: 30px;
\n height: 40px;
\n }
\n \/* \u9009\u4e2d\u88ab\u7981\u7528\u7684input\u5143\u7d20 *\/
\n input:disabled{
\n background-color:grey;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <input type="checkbox">
\n <input type="radio" name="gender">
\n <input type="radio" name="gender">
\n <input type="text">
\n <input type="text" disabled>
\n<\/body>
\n<\/html> <\/p>\n
\u4e8c\u3001\u4f2a\u5143\u7d20\u9009\u62e9\u5668<\/h2>\n\n- \u4f5c\u7528：CSS \u4f2a\u5143\u7d20\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u9009\u62e9\u5668，\u5b83\u53ef\u4ee5\u5728\u4e0d\u6539\u53d8 HTML \u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\u5bf9\u9875\u9762\u5143\u7d20\u7684\u7279\u5b9a\u90e8\u5206\u8fdb\u884c\u6837\u5f0f\u8bbe\u7f6e\u3002\u9009\u4e2d\u5143\u7d20\u4e2d\u7684\u4e00\u4e9b\u7279\u6b8a\u4f4d\u7f6e\u3002<\/li>\n
- \u4f7f\u7528\u4e24\u4e2a\u5192\u53f7<\/li>\n<\/ul>\n
::first-letter<\/h3>\n
\u9009\u4e2d\u5757\u7ea7\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd（\u6c49\u5b57，\u5b57\u7b26） \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n
\u6216\u8005：\u4f7f\u7528span\u6807\u7b7e\u5305\u88f9\u8981\u6539\u53d8\u7684\u5143\u7d20，\u4f7f\u7528\u5143\u7d20\u9009\u62e9\u5668<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144007-689b524719b88.png\")
<\/p>\n
\n
::first-line<\/h3>\n
\u9009\u4e2d\u5757\u7ea7\u5143\u7d20\u7684\u7b2c\u4e00\u884c \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n
\n- \u4f1a\u968f\u7740\u754c\u9762\u5927\u5c0f\u53d8\u5316，\u7b2c\u4e00\u884c\u6587\u5b57\u53d8\u5316，\u4f46\u6c38\u8fdc\u53ea\u9009\u4e2d\u7b2c\u4e00\u884c<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144007-689b5247bbe80.png\")
<\/p>\n
\n
\n
::selection<\/h3>\n
\u9009\u4e2d\u88ab\u9f20\u6807\u9009\u62e9\u7684\u6587\u5b57 \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n
\u6ce8\u610f：\u4ee5\u4e0b\u5c5e\u6027\u53ef\u4ee5\u4e0e ::selection \u4e00\u8d77\u4f7f\u7528：（\u4e0d\u80fd\u4e0e\u5b57\u4f53\u5927\u5c0f\u4e00\u8d77\u4f7f\u7528）<\/p>\n
\n- color<\/li>\n
- background-color<\/li>\n
- text-decoration<\/li>\n
- text-shadow<\/li>\n<\/ul>\n
::before<\/h3>\n
\u5728\u5143\u7d20\u6700\u5f00\u59cb\u7684\u4f4d\u7f6e，\u521b\u5efa\u4e00\u4e2a\u5b50\u5143\u7d20（\u5fc5\u987b\u7528content\u5c5e\u6027\u6307\u5b9a\u5185\u5bb9，\u5c5e\u6027：\u503c\u7684\u65b9\u5f0f）<\/p>\n
\u4f7f\u7528 content \u5c5e\u6027\u6307\u5b9a\u8981\u63d2\u5165\u7684\u5185\u5bb9\u3002content \u7684\u503c\u53ef\u4ee5\u662f：<\/p>\n
\n- \u5b57\u7b26\u4e32：content: "Hello world!";<\/li>\n
- \u56fe\u7247：content: url(myimage.jpg);<\/li>\n
- \u65e0\u5185\u5bb9：content: none;<\/li>\n
- \u8ba1\u6570\u5668：content: counter(li);<\/li>\n
- \u5f15\u53f7：content: open-quote;<\/li>\n
- \u5c5e\u6027\u503c：content: " (" attr(href) ")";<\/li>\n<\/ul>\n
\u6ce8\u610f：\u63d2\u5165\u7684\u5185\u5bb9\u4ecd\u7136\u4f4d\u4e8e\u6307\u5b9a\u5143\u7d20\u5185\u90e8\u3002\u63d2\u5165\u7684\u5185\u5bb9\u4f1a\u6dfb\u52a0\u5230\u5143\u7d20\u5185\u90e8\u7684\u5176\u4ed6\u5185\u5bb9\u4e4b\u524d\u3002<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812144008-689b5248af228.png\")
<\/p>\n
\n
::after<\/h3>\n
\u5728\u5143\u7d20\u6700\u540e\u7684\u4f4d\u7f6e，\u521b\u5efa\u4e00\u4e2a\u5b50\u5143\u7d20（\u5fc5\u987b\u7528content\u5c5e\u6027\u6307\u5b9a\u5185\u5bb9<\/span>）<\/p>\n\u6ce8\u610f：\u63d2\u5165\u7684\u5185\u5bb9\u4ecd\u7136\u4f4d\u4e8e\u6307\u5b9a\u5143\u7d20\u5185\u90e8\u3002\u63d2\u5165\u7684\u5185\u5bb9\u4f1a\u6dfb\u52a0\u5230\u5143\u7d20\u5185\u90e8\u7684\u5176\u4ed6\u5185\u5bb9\u4e4b\u540e\u3002<\/p>\n
<\/h3>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb170\u6b21\uff0c\u70b9\u8d5e6\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u672c\u6587\u603b\u7ed3\u4e86\u524d\u7aefCSS\u4e2d\u4f2a\u7c7b\u9009\u62e9\u5668\u548c\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u7684\u4f7f\u7528\u8981\u70b9\u3002\u4f2a\u7c7b\u9009\u62e9\u5668\u90e8\u5206\u8be6\u7ec6\u4ecb\u7ecd\u4e86\uff1a1\uff09\u52a8\u6001\u9009\u62e9\u5668\uff08link\/visited\/hover\/active\uff09\u7684\u4f7f\u7528\u987a\u5e8f\uff1b2\uff09\u7ed3\u6784\u4f2a\u7c7b\uff08first\/last\/nth-child\/of-type\uff09\u7684\u7528\u6cd5\u533a\u522b\uff1b3\uff09\u5426\u5b9a\u4f2a\u7c7b:not()\u7684\u5e94\u7528\u573a\u666f\u3002\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u90e8\u5206\u8bb2\u89e3\u4e86::first-letter\u3001::first-line\u3001::selection\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca::before\/after\u521b\u5efa\u865a\u62df\u5143\u7d20\u7684\u65b9\u6cd5\u548ccontent\u5c5e\u6027\u4f7f\u7528\u6280\u5de7\u3002\u6587\u7ae0\u901a\u8fc7\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5404\u7c7b\u9009\u62e9\u5668\u7684\u5b9e\u9645\u5e94<\/p>\n","protected":false},"author":2,"featured_media":54117,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[573,87,371,5511,305],"topic":[],"class_list":["post-54134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-css","tag-87","tag-371","tag-5511","tag-305"],"yoast_head":"\n
\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/54134.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb170\u6b21\uff0c\u70b9\u8d5e6\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u672c\u6587\u603b\u7ed3\u4e86\u524d\u7aefCSS\u4e2d\u4f2a\u7c7b\u9009\u62e9\u5668\u548c\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u7684\u4f7f\u7528\u8981\u70b9\u3002\u4f2a\u7c7b\u9009\u62e9\u5668\u90e8\u5206\u8be6\u7ec6\u4ecb\u7ecd\u4e86\uff1a1\uff09\u52a8\u6001\u9009\u62e9\u5668\uff08link\/visited\/hover\/active\uff09\u7684\u4f7f\u7528\u987a\u5e8f\uff1b2\uff09\u7ed3\u6784\u4f2a\u7c7b\uff08first\/last\/nth-child\/of-type\uff09\u7684\u7528\u6cd5\u533a\u522b\uff1b3\uff09\u5426\u5b9a\u4f2a\u7c7b:not()\u7684\u5e94\u7528\u573a\u666f\u3002\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u90e8\u5206\u8bb2\u89e3\u4e86::first-letter\u3001::first-line\u3001::selection\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca::before\/after\u521b\u5efa\u865a\u62df\u5143\u7d20\u7684\u65b9\u6cd5\u548ccontent\u5c5e\u6027\u4f7f\u7528\u6280\u5de7\u3002\u6587\u7ae0\u901a\u8fc7\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5404\u7c7b\u9009\u62e9\u5668\u7684\u5b9e\u9645\u5e94\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/54134.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-12T14:40:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143957-689b523de756c.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/54134.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/54134.html\",\"name\":\"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-08-12T14:40:12+00:00\",\"dateModified\":\"2025-08-12T14:40:12+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/54134.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/54134.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/54134.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/54134.html","og_locale":"zh_CN","og_type":"article","og_title":"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb170\u6b21\uff0c\u70b9\u8d5e6\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u672c\u6587\u603b\u7ed3\u4e86\u524d\u7aefCSS\u4e2d\u4f2a\u7c7b\u9009\u62e9\u5668\u548c\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u7684\u4f7f\u7528\u8981\u70b9\u3002\u4f2a\u7c7b\u9009\u62e9\u5668\u90e8\u5206\u8be6\u7ec6\u4ecb\u7ecd\u4e86\uff1a1\uff09\u52a8\u6001\u9009\u62e9\u5668\uff08link\/visited\/hover\/active\uff09\u7684\u4f7f\u7528\u987a\u5e8f\uff1b2\uff09\u7ed3\u6784\u4f2a\u7c7b\uff08first\/last\/nth-child\/of-type\uff09\u7684\u7528\u6cd5\u533a\u522b\uff1b3\uff09\u5426\u5b9a\u4f2a\u7c7b:not()\u7684\u5e94\u7528\u573a\u666f\u3002\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u90e8\u5206\u8bb2\u89e3\u4e86::first-letter\u3001::first-line\u3001::selection\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca::before\/after\u521b\u5efa\u865a\u62df\u5143\u7d20\u7684\u65b9\u6cd5\u548ccontent\u5c5e\u6027\u4f7f\u7528\u6280\u5de7\u3002\u6587\u7ae0\u901a\u8fc7\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5404\u7c7b\u9009\u62e9\u5668\u7684\u5b9e\u9645\u5e94","og_url":"https:\/\/www.wsisp.com\/helps\/54134.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-08-12T14:40:12+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250812143957-689b523de756c.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/54134.html","url":"https:\/\/www.wsisp.com\/helps\/54134.html","name":"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-08-12T14:40:12+00:00","dateModified":"2025-08-12T14:40:12+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/54134.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/54134.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/54134.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u524d\u7aefcss\u5b66\u4e60\u7b14\u8bb03\uff1a\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u4f2a\u5143\u7d20\u9009\u62e9\u5668"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/54134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=54134"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/54134\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/54117"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=54134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=54134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=54134"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=54134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/p>\n
\n
2.\u52a8\u6001\u9009\u62e9\u5668（\u7528\u6237\u4ea4\u4e92）<\/h3>\n
<\/p>\n
\n
\u6ce8\u610f\u987a\u5e8f：link（\u672a\u8fde\u63a5），visited（\u5df2\u8bbf\u95ee），hover（\u60ac\u505c），active（\u6fc0\u6d3b）<\/span><\/p>\n \u5bf9\u4e8e\u4e00\u4e2a\u672a\u8bbf\u95ee\u7684\u8d85\u94fe\u63a5，\u5904\u4e8elink，\u7136\u540e\u9f20\u6807\u60ac\u6d6e（hover），\u70b9\u51fb\u6fc0\u6d3b（active），\u6700\u540e\u5904\u4e8e\u5df2\u8bbf\u95ee（visited）<\/p>\n visited\u4e0d\u80fd\u5199\u5728\u6700\u540e，\u4e0d\u7136，\u540e\u6765\u8005\u5c45\u4e0a，\u4e0d\u4f1a\u51fa\u73b0\u60ac\u6d6e\u548c\u6fc0\u6d3b\u72b6\u6001（\u88ab\u8986\u76d6）<\/p>\n <!DOCTYPE html> \/* \u8bbf\u95ee\u8fc7a\u5143\u7d20，\u989c\u8272\u4e5f\u4e0d\u4f1a\u6539\u53d8 -child \u57fa\u4e8e\u5176\u7236\u5143\u7d20\u7684\u6240\u6709\u5b50\u4ee3\u5143\u7d20；-of-type \u57fa\u4e8e\u5176\u7236\u5143\u7d20\u7684\u6240\u6709\u540c\u7c7b\u578b\u7684\u5b50\u4ee3\u5143\u7d20<\/span><\/p>\n :first-child \u4f2a\u7c7b\u4e0e\u6307\u5b9a\u7684\u5143\u7d20\u5339\u914d：\u8be5\u5143\u7d20\u662f\u53e6\u4e00\u4e2a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n <!DOCTYPE html> <\/body> \/* \u9009\u4e2ddiv\u7684\u6700\u540e\u4e00\u4e2a\u513f\u5b50\u5143\u7d20（\u6309\u7167\u6240\u6709\u5144\u5f1f\u8ba1\u7b97）\u2014\u2014\u7ed3\u67841 *\/ <!– \u7ed3\u67841 –> \u9009\u62e9\u5668\u62c6\u89e3<\/p>\n n\u7684\u53d6\u503c\u8303\u56f4：0\u5230\u6b63\u65e0\u7a77<\/p>\n n\u7684\u53d6\u503c\u5f62\u5f0f：a*x+b<\/p>\n \/*\u9009\u4e2ddiv\u7684\u7b2cn\u4e2a\u513f\u5b50p \u6ce8\u610f：\u5b83\u57fa\u4e8e\u7236\u5143\u7d20\u4e2d\u7684\u6240\u6709\u5b50\u5143\u7d20\u6765\u8ba1\u7b97\u7684，\u800c\u4e0d\u4ec5\u4ec5\u662f\u7279\u5b9a\u7c7b\u578b\u7684\u5b50\u5143\u7d20\u3002\u5b83\u4f1a\u6309\u7167\u5b50\u5143\u7d20\u7684\u987a\u5e8f\u8fdb\u884c\u7f16\u53f7，\u7136\u540e\u6839\u636e\u9009\u62e9\u5668\u7684\u89c4\u5219\u6765\u9009\u62e9\u5143\u7d20\u3002<\/p>\n \u56e0\u6b64，nth-child(-n+4) \u4f1a\u9009\u62e9\u8fd9 4 \u4e2a\u5b50\u5143\u7d20，\u4f46\u53ea\u6709\u5176\u4e2d\u7684 <p> \u5143\u7d20\u4f1a\u5e94\u7528\u6837\u5f0f\u3002<\/p>\n \u5e0c\u671b\u9009\u62e9\u524d 4 \u4e2a <p> \u5143\u7d20，\u800c\u4e0d\u662f\u524d 4 \u4e2a\u5b50\u5143\u7d20，\u5e94\u8be5\u4f7f\u7528 nth-of-type，\u800c\u4e0d\u662f nth-child\u3002<\/p>\n <!– \u9009\u4e2ddiv\u7684\u7b2c4,3,2,1\u4e2a\u5b50\u4ee3p\u5143\u7d20（\u5148\u627e\u5b50\u4ee3\u5143\u7d20） –> <div> \u9009\u4e2ddiv\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n \u9009\u4e2ddiv\u7684\u6700\u540e\u4e00\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n nth-of-type \u662f\u57fa\u4e8e\u7279\u5b9a\u7c7b\u578b\u7684\u5b50\u5143\u7d20\u6765\u8ba1\u7b97\u7684，\u800c\u4e0d\u662f\u6240\u6709\u5b50\u5143\u7d20\u3002<\/p>\n \u9009\u4e2ddiv\u7684\u7b2cn\u4e2a\u513f\u5b50p\u5143\u7d20（\u6309\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u8ba1\u7b97）<\/p>\n \u9009\u62e9\u5668<\/p>\n<\/td>\n \u4f5c\u7528<\/p>\n<\/td>\n \u5f53\u524d\u793a\u4f8b\u5339\u914d\u7ed3\u679c<\/p>\n<\/td>\n<\/tr>\n div > p:last-child<\/p>\n<\/td>\n \u9009\u62e9\u4f5c\u4e3a\u7236\u5143\u7d20\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20\u7684\u76f4\u63a5 <p><\/p>\n<\/td>\n <p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n div p:last-of-type<\/p>\n<\/td>\n \u9009\u62e9\u7236\u5143\u7d20\u5185\u540c\u7c7b\u578b\u7684\u6700\u540e\u4e00\u4e2a <p><\/p>\n<\/td>\n <p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n div > p:last-of-type<\/p>\n<\/td>\n \u540c :last-of-type<\/p>\n ，\u4f46\u4ec5\u9650\u76f4\u63a5\u5b50\u7ea7<\/p>\n<\/td>\n <p>\u8d75\u516d：68<\/p><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5c5e\u6027\u540d：\u5c5e\u6027\u503c<\/p>\n }<\/p>\n \u62ec\u53f7\u91cc\u53ef\u4ee5\u662f\u7c7b\u9009\u62e9\u5668，\u5c5e\u6027\u9009\u62e9\u5668，id\u9009\u62e9\u5668，\u7ed3\u6784\u9009\u62e9\u5668\u7b49\u7b49<\/p>\n \/* \u4e3a\u6240\u6709\u975e\u9690\u85cf\u8f93\u5165\u6846\u6dfb\u52a0\u8fb9\u6846 *\/ \/* \u5f53\u524d\u9875\u9762\u83dc\u5355\u9879\u4e0d\u52a0\u7c97 *\/ \/* \u6700\u540e\u4e00\u9879\u4e0d\u52a0\u4e0b\u5212\u7ebf *\/ \/* \u975e\u7981\u7528\u6309\u94ae\u60ac\u505c\u6548\u679c *\/ \u6ce8\u610f\u4e8b\u9879<\/p>\n \u4e0d\u652f\u6301\u5d4c\u5957 :not()<\/p>\n \/* \u65e0\u6548\u5199\u6cd5 *\/ \u4e0d\u80fd\u5305\u542b\u4f2a\u5143\u7d20<\/p>\n \/* \u65e0\u6548\u5199\u6cd5 *\/ \u4f18\u5148\u7ea7\u8ba1\u7b97 :not() \u7684\u4f18\u5148\u7ea7\u7531\u5176\u53c2\u6570\u51b3\u5b9a\u3002\u4f8b\u5982：<\/p>\n \u9009\u4e2d\u5c31\u53d8\u5927，\u4e0d\u9009\u4e2d\u5c31\u4fdd\u6301\u539f\u72b6；<\/p>\n focus\u662f\u9009\u4e2d\u53d8\u5927，\u53d6\u6d88\u9009\u4e2d\u4e0d\u53d8\u56de\u539f\u72b6<\/p>\n <!DOCTYPE html> \u9009\u4e2d\u5757\u7ea7\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd（\u6c49\u5b57，\u5b57\u7b26） \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n \u6216\u8005：\u4f7f\u7528span\u6807\u7b7e\u5305\u88f9\u8981\u6539\u53d8\u7684\u5143\u7d20，\u4f7f\u7528\u5143\u7d20\u9009\u62e9\u5668<\/p>\n \n \u9009\u4e2d\u5757\u7ea7\u5143\u7d20\u7684\u7b2c\u4e00\u884c \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n \n \n \u9009\u4e2d\u88ab\u9f20\u6807\u9009\u62e9\u7684\u6587\u5b57 \u8bbe\u7f6e\u7279\u6b8a\u6837\u5f0f<\/p>\n \u6ce8\u610f：\u4ee5\u4e0b\u5c5e\u6027\u53ef\u4ee5\u4e0e ::selection \u4e00\u8d77\u4f7f\u7528：（\u4e0d\u80fd\u4e0e\u5b57\u4f53\u5927\u5c0f\u4e00\u8d77\u4f7f\u7528）<\/p>\n \u5728\u5143\u7d20\u6700\u5f00\u59cb\u7684\u4f4d\u7f6e，\u521b\u5efa\u4e00\u4e2a\u5b50\u5143\u7d20（\u5fc5\u987b\u7528content\u5c5e\u6027\u6307\u5b9a\u5185\u5bb9，\u5c5e\u6027：\u503c\u7684\u65b9\u5f0f）<\/p>\n \u4f7f\u7528 content \u5c5e\u6027\u6307\u5b9a\u8981\u63d2\u5165\u7684\u5185\u5bb9\u3002content \u7684\u503c\u53ef\u4ee5\u662f：<\/p>\n \u6ce8\u610f：\u63d2\u5165\u7684\u5185\u5bb9\u4ecd\u7136\u4f4d\u4e8e\u6307\u5b9a\u5143\u7d20\u5185\u90e8\u3002\u63d2\u5165\u7684\u5185\u5bb9\u4f1a\u6dfb\u52a0\u5230\u5143\u7d20\u5185\u90e8\u7684\u5176\u4ed6\u5185\u5bb9\u4e4b\u524d\u3002<\/p>\n \n \u5728\u5143\u7d20\u6700\u540e\u7684\u4f4d\u7f6e，\u521b\u5efa\u4e00\u4e2a\u5b50\u5143\u7d20（\u5fc5\u987b\u7528content\u5c5e\u6027\u6307\u5b9a\u5185\u5bb9<\/span>）<\/p>\n \u6ce8\u610f：\u63d2\u5165\u7684\u5185\u5bb9\u4ecd\u7136\u4f4d\u4e8e\u6307\u5b9a\u5143\u7d20\u5185\u90e8\u3002\u63d2\u5165\u7684\u5185\u5bb9\u4f1a\u6dfb\u52a0\u5230\u5143\u7d20\u5185\u90e8\u7684\u5176\u4ed6\u5185\u5bb9\u4e4b\u540e\u3002<\/p>\n \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb170\u6b21\uff0c\u70b9\u8d5e6\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u672c\u6587\u603b\u7ed3\u4e86\u524d\u7aefCSS\u4e2d\u4f2a\u7c7b\u9009\u62e9\u5668\u548c\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u7684\u4f7f\u7528\u8981\u70b9\u3002\u4f2a\u7c7b\u9009\u62e9\u5668\u90e8\u5206\u8be6\u7ec6\u4ecb\u7ecd\u4e86\uff1a1\uff09\u52a8\u6001\u9009\u62e9\u5668\uff08link\/visited\/hover\/active\uff09\u7684\u4f7f\u7528\u987a\u5e8f\uff1b2\uff09\u7ed3\u6784\u4f2a\u7c7b\uff08first\/last\/nth-child\/of-type\uff09\u7684\u7528\u6cd5\u533a\u522b\uff1b3\uff09\u5426\u5b9a\u4f2a\u7c7b:not()\u7684\u5e94\u7528\u573a\u666f\u3002\u4f2a\u5143\u7d20\u9009\u62e9\u5668\u90e8\u5206\u8bb2\u89e3\u4e86::first-letter\u3001::first-line\u3001::selection\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca::before\/after\u521b\u5efa\u865a\u62df\u5143\u7d20\u7684\u65b9\u6cd5\u548ccontent\u5c5e\u6027\u4f7f\u7528\u6280\u5de7\u3002\u6587\u7ae0\u901a\u8fc7\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5404\u7c7b\u9009\u62e9\u5668\u7684\u5b9e\u9645\u5e94<\/p>\n","protected":false},"author":2,"featured_media":54117,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[573,87,371,5511,305],"topic":[],"class_list":["post-54134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-css","tag-87","tag-371","tag-5511","tag-305"],"yoast_head":"\n
\n<html lang="zh-CN">
\n<head>
\n <meta charset="UTF-8">
\n <title>\u4f2a\u7c7b\u9009\u62e9\u5668<\/title>
\n <style><\/p>\n
\n <a href="hhtps:\/\/www.baidu.com">\u53bb\u767e\u5ea6<\/a>
\n *\/
\n \/* \u524d\u63d0\u662fa\u6807\u7b7e\u7684target\u5c5e\u6027\u662f_self，\u5728\u8be5\u9875\u9762\u8df3\u8f6c *\/
\n \/* link\u548cvisited\u662f\u8d85\u94fe\u63a5\u7279\u6709\u7684 *\/
\n \/* \u9009\u4e2d\u6ca1\u6709\u8bbf\u95ee\u8fc7\u7684a\u5143\u7d20 *\/
\n a:link{
\n color:chocolate;
\n }
\n \/* \u9009\u4e2d\u8bbf\u95ee\u8fc7\u7684a\u5143\u7d20 *\/
\n a:visited{
\n color:grey;
\n }
\n \/* \u9009\u4e2d\u9f20\u6807\u60ac\u6d6e\u7684a\u5143\u7d20 *\/
\n a:hover{
\n color: cadetblue;
\n }
\n \/* \u9009\u4e2d\u6fc0\u6d3b（\u9f20\u6807\u70b9\u51fb\u4e0d\u677e\u624b）\u72b6\u6001\u7684a\u5143\u7d20 *\/
\n a:active{
\n color: blue;
\n }
\n \/* \u8fd9\u56db\u4e2a\u6709\u987a\u5e8f：link visited hover active *\/
\n \/* hover\u4e0eactive\u53ef\u4ee5\u7528\u4e8e\u5176\u4ed6\u5143\u7d20，\u4f8b\u5982p，span\u7b49\u7b49 *\/
\n p:hover{
\n color: blueviolet;
\n }
\n \/* \u83b7\u53d6\u7126\u70b9（\u53ea\u6709\u8868\u5355\u5143\u7d20\u624d\u80fd\u4f7f\u7528focus\u4f2a\u7c7b） *\/
\n input:focus{
\n \/* \u8f93\u5165\u6587\u5b57\u989c\u8272\u53d8\u6210\u84dd\u8272 *\/
\n color: blue;
\n }
\n select:focus{
\n color: aqua;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <a href="https:\/\/www.baidu.com" >\u53bb\u767e\u5ea6<\/a>
\n <a href="https:\/\/www.jd.com" >\u53bb\u4eac\u4e1c<\/a>
\n <br>
\n <p>\u524d\u7aef<\/p>
\n <!– \u8f93\u5165\u6846 –>
\n <input type="text">
\n <br>
\n <!– \u4e0b\u62c9\u6846 –>
\n <select name="age" >
\n <option value="under 18">18\u4ee5\u4e0b<\/option>
\n <option value="18-25">18-25\u5c81<\/option>
\n <option value="26-35">26-35\u5c81<\/option>
\n <\/select>
\n<\/body>
\n<\/html> <\/p>\n3.\u7ed3\u6784\u4f2a\u7c7b<\/h3>\n
：first-child：\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a<\/h4>\n
<\/p>\n<\/p>\n
\n<html lang="zh-CN">
\n<head>
\n <meta charset="UTF-8">
\n <title>\u7ed3\u6784\u4f2a\u7c7b01<\/title>
\n <style>
\n \/* \u540e\u4ee3\u9009\u62e9\u5668：\u9009\u4e2ddiv\u540e\u4ee3（\u513f\u5b50，\u5b59\u5b50，\u3002\u3002）p\u5143\u7d20(\u5728div\u6240\u6709\u5b50\u5143\u7d20\u4e2d\u627e)，p\u5143\u7d20\u7684\u7236\u4eb2\u662f\u8c01\u65e0\u6240\u8c13，\u4f46\u662fp\u5fc5\u987b\u662f\u5176\u7236\u4eb2\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50\u2014\u2014\u7ed3\u67843 *\/
\n \/* main\u7684p\u5143\u7d20\u53d8\u8272，\u5b83\u662fdiv\u7684\u5b59\u5b50，\u662f\u540e\u4ee3\u5143\u7d20，\u662f\u7b2c\u4e00\u4e2a *\/
\n div p:first-child{
\n color: blue;
\n }
\n \/* \u9009\u4e2dp\u5143\u7d20，p\u5143\u7d20\u7684\u7236\u4eb2\u662f\u8c01\u65e0\u6240\u8c13，\u4f46\u662fp\u5fc5\u987b\u662f\u5176\u7236\u4eb2\u7684\u7b2c\u4e00\u4e2a\u513f\u5b50\u2014\u2014\u7ed3\u67843 *\/
\n \/* \u540c\u65f6\u5b9a\u4e49\u4e86div p:first-child\u548cp:first-child\u4e24\u4e2a\u9009\u62e9\u5668，\u524d\u8005\u5177\u6709\u66f4\u9ad8\u7684\u7279\u5f02\u6027（\u56e0\u4e3a\u5b83\u66f4\u5177\u4f53），\u6240\u4ee5\u5373\u4f7f\u4e24\u4e2a\u89c4\u5219\u90fd\u5339\u914d，\u84dd\u8272\u7684\u89c4\u5219\u4f1a\u8986\u76d6\u7ea2\u8272\u7684\u89c4\u5219\u3002 *\/
\n p:first-child{
\n color: red;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <!– \u7ed3\u67843 –>
\n <div>
\n <p>\u5f00\u53d1<\/p>
\n <!– main\u8868\u793a\u4e3b\u8981\u5185\u5bb9 –>
\n <main>
\n <p>\u5f20\u4e09：98<\/p>
\n <\/main>
\n <!– div\u7684\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20 –>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>\u8d75\u516d：68<\/p>
\n <\/div><\/p>\n
\n<\/html><\/p>\n：last-child：\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a<\/h4>\n
\n div > p:last-child{
\n color: red;
\n }<\/p>\n
\n <div>
\n <p >\u5f20\u4e09：98<\/p>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>
\n \u8d75\u516d：68
\n <span>99<\/span>
\n <\/p>
\n <\/div> <\/p>\n\n
\n
\n
：nth-child（n）：\u9009\u62e9\u9009\u62e9\u6240\u6709\u5144\u5f1f\u5143\u7d20\u7684\u7b2cn\u4e2a<\/h4>\n
\n
\n
\n \u5143\u7d20（\u6309\u7167\u6240\u6709\u5144\u5f1f\u8ba1\u7b97）\u2014\u2014\u7ed3\u67841 *\/
\n div > p:nth-child(3){
\n color: blue;
\n } <\/p>\n<\/p>\n<\/p>\n\n
\n
\n
\ndiv > p:nth-child(-n+4){
\n background-color: burlywood;
\n }<\/p>\n
\n <span>\u6d4b\u8bd5<\/span> <!– \u7b2c\u4e00\u4e2a\u5b50\u4ee3\u5143\u7d20 –>
\n <p>\u5f20\u4e09：98<\/p>
\n <p>\u674e\u56db：88<\/p>
\n <p>\u738b\u4e94：76<\/p>
\n <p>\u8d75\u516d：68<\/p>
\n<\/div>
\n<!–\u5728\u8fd9\u4e2a\u7ed3\u6784\u4e2d，<span> \u662f\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20，\u800c <p> \u5143\u7d20\u662f\u4ece\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20\u5f00\u59cb\u7684\u3002 –> <\/p>\n：first-of-type：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a<\/h4>\n
\n
<\/p>\n：last-of-type：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a<\/h4>\n
\n
<\/p>\n：nth-of-type（n）：\u6240\u6709\u540c\u7c7b\u578b\u7684\u5144\u5f1f\u5143\u7d20\u7684\u7b2cn\u4e2a<\/h4>\n
\n
<\/p>\n
\n<\/p>\n\n\n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n 4.\u5426\u5b9a\u4f2a\u7c7b（\u4f5c\u6392\u9664）<\/h3>\n
\n
<\/p>\n\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h4>\n
(1) \u8868\u5355\u63a7\u4ef6\u6392\u9664<\/h5>\n
\ninput:not([type="hidden"]) {
\n border: 1px solid #ccc;
\n} <\/p>\n(2) \u5bfc\u822a\u83dc\u5355\u9ad8\u4eae<\/h5>\n
\n.nav-item:not(.active) {
\n font-weight: normal;
\n} <\/p>\n(3) \u5217\u8868\u6837\u5f0f\u63a7\u5236<\/h5>\n
\nli:not(:last-child) {
\n border-bottom: 1px solid #eee;
\n} <\/p>\n(4) \u65e0\u969c\u788d\u4f18\u5316<\/h5>\n
\nbutton:not([disabled]):hover {
\n background-color: #555;
\n} <\/p>\n
\n:not(:not(p)) {} <\/p>\n
\n:not(::before) {} <\/p>\n\n
5.UI\u9009\u62e9\u5668<\/h3>\n
<\/p>\n
\n<html lang="en">
\n<head>
\n <meta charset="UTF-8">
\n <title>Document<\/title>
\n <style>
\n \/* \u9009\u4e2d\u7684\u662f\u52fe\u9009\u5f97\u590d\u9009\u6846\u6216\u8005\u5355\u9009\u6846（\u4e0d\u80fd\u5199\u989c\u8272\u7684\u6837\u5f0f） *\/
\n input:checked{
\n width: 30px;
\n height: 40px;
\n }
\n \/* \u9009\u4e2d\u88ab\u7981\u7528\u7684input\u5143\u7d20 *\/
\n input:disabled{
\n background-color:grey;
\n }
\n <\/style>
\n<\/head>
\n<body>
\n <input type="checkbox">
\n <input type="radio" name="gender">
\n <input type="radio" name="gender">
\n <input type="text">
\n <input type="text" disabled>
\n<\/body>
\n<\/html> <\/p>\n\u4e8c\u3001\u4f2a\u5143\u7d20\u9009\u62e9\u5668<\/h2>\n
\n
::first-letter<\/h3>\n
<\/p>\n::first-line<\/h3>\n
\n
<\/p>\n::selection<\/h3>\n
\n
::before<\/h3>\n
\n
<\/p>\n::after<\/h3>\n
<\/h3>\n","protected":false},"excerpt":{"rendered":"