{"id":1264,"date":"2021-03-15T08:30:00","date_gmt":"2021-03-15T00:30:00","guid":{"rendered":"https:\/\/\/?p=1264"},"modified":"2022-01-16T14:57:50","modified_gmt":"2022-01-16T06:57:50","slug":"before-after-css","status":"publish","type":"post","link":"https:\/\/\/before-after-css\/","title":{"rendered":"\u4ec0\u9ebc\u662f::before\u548c::after\uff1fCSS\u507d\u5143\u7d20\u600e\u9ebc\u7528[\u5be6\u4f5c\u7bc4\u4f8b]"},"content":{"rendered":"\n<p>CSS\u7684\u507d\u5143\u7d20::before\u548c::after\u61c9\u7528\u53ef\u4ee5\u975e\u5e38\u5ee3\u6cdb\uff0c\u800c\u4e14\u4f4d\u7f6e\u4e0a\u5982\u679c\u642d\u914dposition:relative;\u548cposition:absolute;\u76f8\u5c0d\u4f4d\u7f6e\u5c6c\u6027\u8a2d\u5b9a\uff0c\u5c31<strong>\u582a\u7a31\u662f\u7db2\u9801\u8a2d\u8a08\u5e2b\u6700\u9748\u6d3b\u7684\u5de5\u5177\u4e4b\u4e00\u5462\uff01<\/strong><\/p>\n\n\n\n<p>\u9084\u4e0d\u77e5\u9053\u600e\u9ebc\u4f7f\u7528CSS\u7684position\u76f8\u5c0d\u4f4d\u7f6e\u5c6c\u6027\u53ef\u4ee5\u6309\u4e0b\u65b9<a 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title=\"\u4ec0\u9ebc\u662f\u300c\u507d\u5143\u7d20\u300d\uff1f\">\u4ec0\u9ebc\u662f\u300c\u507d\u5143\u7d20\u300d\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=/index.html"https:\/\/\/before-after-css\/#%E3%80%8C%E5%81%BD%E5%85%83%E7%B4%A0%E3%80%8D%E5%A6%82%E4%BD%95%E9%81%8B%E4%BD%9C%E7%9A%84%EF%BC%9F\" title=\"\u300c\u507d\u5143\u7d20\u300d\u5982\u4f55\u904b\u4f5c\u7684\uff1f\">\u300c\u507d\u5143\u7d20\u300d\u5982\u4f55\u904b\u4f5c\u7684\uff1f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=/index.html"https:\/\/\/before-after-css\/#%E5%81%BD%E5%85%83%E7%B4%A0_before%E5%92%8C_after%E5%AF%A6%E4%BD%9C%E7%AF%84%E4%BE%8B\" title=\"\u507d\u5143\u7d20::before\u548c::after\u5be6\u4f5c\u7bc4\u4f8b\">\u507d\u5143\u7d20::before\u548c::after\u5be6\u4f5c\u7bc4\u4f8b<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=/index.html"https:\/\/\/before-after-css\/#HTML%E5%9F%BA%E6%9C%AC%E8%A8%AD%E5%AE%9A\" title=\"HTML\u57fa\u672c\u8a2d\u5b9a\">HTML\u57fa\u672c\u8a2d\u5b9a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=/index.html"https:\/\/\/before-after-css\/#%E5%8A%A0%E4%B8%8ACSS%E5%81%BD%E5%85%83%E7%B4%A0\" title=\"\u52a0\u4e0aCSS\u507d\u5143\u7d20\">\u52a0\u4e0aCSS\u507d\u5143\u7d20<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=/index.html"https:\/\/\/before-after-css\/#%E5%81%BD%E5%85%83%E7%B4%A0_before%E6%88%96_after%E8%BC%95%E9%AC%86%E5%AE%8C%E6%88%90%E7%B6%B2%E9%A0%81%E7%9A%84%E9%BB%9E%E7%B6%B4%E5%92%8C%E7%B7%9A%E6%AE%B5\" 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title=\"\u914d\u5408\u76f8\u5c0d\u4f4d\u7f6e\u8a2d\u5b9a\uff0c\u507d\u5143\u7d20\u96a8\u4f60\u653e\uff01\">\u914d\u5408\u76f8\u5c0d\u4f4d\u7f6e\u8a2d\u5b9a\uff0c\u507d\u5143\u7d20\u96a8\u4f60\u653e\uff01<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=/index.html"https:\/\/\/before-after-css\/#%E8%A7%A3%E6%B1%BA%E4%BD%A0%E5%85%A7%E5%BF%83%E7%9A%84%E7%96%91%E6%83%91\" title=\"\u89e3\u6c7a\u4f60\u5167\u5fc3\u7684\u7591\u60d1\">\u89e3\u6c7a\u4f60\u5167\u5fc3\u7684\u7591\u60d1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=/index.html"https:\/\/\/before-after-css\/#_before%E5%92%8C_after%E5%AF%A6%E5%8B%99%E4%B8%8A%E8%A6%81%E5%B0%8F%E5%BF%83%E7%9A%84%E5%9C%B0%E6%96%B9\" title=\"::before\u548c::after\u5be6\u52d9\u4e0a\u8981\u5c0f\u5fc3\u7684\u5730\u65b9\">::before\u548c::after\u5be6\u52d9\u4e0a\u8981\u5c0f\u5fc3\u7684\u5730\u65b9<\/a><\/li><li 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class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%8C%E5%81%BD%E5%85%83%E7%B4%A0%E3%80%8D%E5%A6%82%E4%BD%95%E9%81%8B%E4%BD%9C%E7%9A%84%EF%BC%9F\"><\/span><strong>\u300c\u507d\u5143\u7d20\u300d\u5982\u4f55\u904b\u4f5c\u7684\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u9019\u500b\u6771\u897f\u7c21\u6613\u4f86\u8aaa\uff0c\u662f\u4e00\u500b\u53ef\u4ee5\u8b93\u4f60\u50c5\u900f\u904eCSS\u6a94\u6848\uff0c\u5c31\u80fd\u589e\u52a0\u6771\u897f\u5728HTML\u5167\u6587\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u5be6\u52d9\u61c9\u7528\u4e0a\u9664\u4e86<strong>\u52a0\u5165\u6587\u5b57\u5167\u5bb9\uff0c<\/strong>\u9084\u80fd<strong>\u589e\u52a0\u5404\u7a2e\u4e0d\u540c\u7684\u6771\u897f\u5728\u756b\u9762\u4e0a\uff0c<\/strong>\u4e5f\u53ef\u4ee5<strong>\u642d\u914dposition\u5c6c\u6027\uff0c<\/strong>\u8b93\u4f60\u589e\u52a0\u7684\u6771\u897f\u6f02\u6d6e\u5728\u9801\u9762\u4efb\u4f55\u4f60\u5e0c\u671b\u4ed6\u5b58\u5728\u7684\u4f4d\u7f6e\u5466\uff01<\/p>\n\n\n\n<p>\u807d\u8d77\u4f86\u8d85\u53b2\u5bb3\u7684\u5427\uff01<br>\u9019\u908a\u5c31\u900f\u904e\u7bc4\u4f8b\u4f86\u8aaa\u660e\u56c9\uff01<\/p>\n\n\n\n<h2 class=\"has-palette-color-4-color has-text-color has-background wp-block-heading\" style=\"background-color:#ffe1da\"><span class=\"ez-toc-section\" id=\"%E5%81%BD%E5%85%83%E7%B4%A0_before%E5%92%8C_after%E5%AF%A6%E4%BD%9C%E7%AF%84%E4%BE%8B\"><\/span>\u507d\u5143\u7d20::before\u548c::after\u5be6\u4f5c\u7bc4\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"HTML%E5%9F%BA%E6%9C%AC%E8%A8%AD%E5%AE%9A\"><\/span><strong>HTML\u57fa\u672c\u8a2d\u5b9a<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u60f3\u4e00\u6b65\u4e00\u6b65\u641e\u61c2\u7684\u5927\u5bb6\uff0c\u4e5f\u5efa\u8b70\u53ef\u4ee5\u76f4\u63a5\u958b\u555f\u4f60\u7684\u7de8\u8f2f\u5668\uff0c\u61f6\u5f97\u6253\u7a0b\u5f0f\u78bc\u7684\u8a71\uff0c\u5c31\u7b97\u662f\u8907\u88fd\u8cbc\u4e0a\u770b\u770b\u6548\u679c\u4e5f\u597d\uff0c\u53ea\u6709\u628a\u7bc4\u4f8b\u770b\u904e\u53bb\u7684\u8a71\u6709\u6642\u5019\u4e5f\u6bd4\u8f03\u96e3\u5438\u6536\u5466\uff01<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><span style=\"color:#929292\" class=\"has-inline-color\">&lt;!-- HTML --&gt;<\/span>\n\n&lt;div class=\"intro\"&gt;\u6211\u662f\u827e\u5496Aikko\uff01&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<p>CSS\u6211\u5011\u5148\u7559\u7a7a\uff0cHTML\u7528\u4e00\u500b&lt;div&gt;\u6a19\u7c64\u5beb\u4e0b\u81ea\u6211\u4ecb\u7d39\uff0c\u4e26\u4e14\u7d66\u4e88\u5b83\u4e00\u500bclass\u7576\u4f5c\u7b49\u7b49\u8981\u5728CSS\u4f7f\u7528\u7684\u6a23\u5f0f\u540d\u7a31\u3002<\/p>\n\n\n\n<p>\u4e0a\u65b9\u7a0b\u5f0f\u78bc\u7684\u7d50\u679c\u6703\u986f\u793a\u9019\u6a23\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"312\" height=\"202\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me.png?resize=312%2C202&#038;ssl=1\" alt=\"HTML\u5448\u73fe\u7d50\u679c\" class=\"wp-image-1280\" title=\"HTML\u5448\u73fe\u7d50\u679c\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me.png?w=312&amp;ssl=1 312w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me.png?resize=300%2C194&amp;ssl=1 300w\" sizes=\"(max-width: 312px) 100vw, 312px\" data-recalc-dims=\"1\" \/><figcaption>HTML\u5448\u73fe\u7d50\u679c<\/figcaption><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8A%A0%E4%B8%8ACSS%E5%81%BD%E5%85%83%E7%B4%A0\"><\/span><strong>\u52a0\u4e0aCSS\u507d\u5143\u7d20<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u63a5\u4e0b\u4f86\u6211\u5011\u8a66\u8457\u52a0\u4e0a\u507d\u5143\u7d20::before\u548c::after\u7684CSS\u5427\uff01<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><span style=\"color:#929292\" class=\"has-inline-color\">\/* CSS *\/<\/span>\n\n.intro::before{\n  content: \"\u55e8\uff01\u5927\u5bb6\u597d\uff0c\"; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u52a0\u5165\u9019\u4e9b\u5167\u5bb9\u5728\u6574\u500b&lt;div&gt;\u7684\u524d\u9762*\/<\/span>\n  color: blue; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5b57\u9ad4\u70ba\u85cd\u8272*\/<\/span>\n}\n\n.intro::after{\n  content: \"\u8acb\u591a\u6307\u6559\uff01\"; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u52a0\u5165\u9019\u4e9b\u5167\u5bb9\u5728\u6574\u500b&lt;div&gt;\u7684\u5f8c\u9762*\/<\/span>\n  color: green; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5b57\u9ad4\u70ba\u7da0\u8272*\/<\/span>\n}<\/code><\/pre>\n\n\n\n<p><strong>::before<\/strong>\u5c31\u662f\u53ef\u4ee5\u5c07\u5275\u5efa\u7684\u5167\u5bb9\u76f4\u63a5\u653e\u5728\u6574\u584a&lt;div&gt;\u6a19\u7c64\u5167\u5bb9\u7684<strong>\u524d\u9762<\/strong>\uff1b<br><strong>::after<\/strong>\u5247\u662f\u653e\u5728<strong>\u5f8c\u9762<\/strong>\uff0c\u60f3\u52a0\u5165\u7684\u6587\u5b57\u5167\u5bb9\u53ef\u4ee5\u76f4\u63a5\u653e\u5728<strong>content\u7684\u5c6c\u6027<\/strong>\u7576\u4e2d\uff0c\u5448\u73fe\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"412\" height=\"94\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me2.png?resize=412%2C94&#038;ssl=1\" alt=\"\u52a0\u5165\u507d\u5143\u7d20\u5f8c\u7684\u5448\u73fe\u7d50\u679c\" class=\"wp-image-1281\" title=\"\u52a0\u5165\u507d\u5143\u7d20\u5f8c\u7684\u5448\u73fe\u7d50\u679c\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me2.png?w=412&amp;ssl=1 412w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me2.png?resize=300%2C68&amp;ssl=1 300w\" sizes=\"(max-width: 412px) 100vw, 412px\" data-recalc-dims=\"1\" \/><figcaption>\u52a0\u5165\u507d\u5143\u7d20\u5f8c\u7684\u5448\u73fe\u7d50\u679c<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u7528\u984f\u8272\u5340\u5206\u5c31\u66f4\u6e05\u695a\u4e86\uff0c\u6709\u6c92\u6709\u767c\u73fe<strong>HTML\u5167\u5bb9\u5b8c\u5168\u4e0d\u7528\u8b8a\u66f4\uff0c\u9760\u8457CSS\u5c31\u80fd\u52a0\u5165\u5167\u5bb9\u5230HTML<\/strong>\uff0c\u5b8c\u5168\u662f\u6211\u9019\u7a2e\u5e95\u5c64\u5de5\u7a0b\u5e2b\u6539\u4e0d\u5230HTML\u6642\u7684\u798f\u97f3\u554a\uff01<\/p>\n\n\n\n<p>\u5230\u9019\u88e1\uff0c\u4f60\u5df2\u7d93\u5b78\u6703\u6700\u7c21\u6613\u7684\u507d\u5143\u7d20\u61c9\u7528\u4e86\uff0c\u8d95\u7dca\u6d88\u5316\u7df4\u7fd2\u4e00\u4e0b\uff0c\u7dca\u63a5\u8457\u6211\u5011\u8b93\u5b83\u6709\u66f4\u5ee3\u6cdb\u7684\u61c9\u7528\u5427\uff01<\/p>\n\n\n\n<h2 class=\"has-palette-color-4-color has-text-color has-background wp-block-heading\" style=\"background-color:#ffe1da\"><span class=\"ez-toc-section\" id=\"%E5%81%BD%E5%85%83%E7%B4%A0_before%E6%88%96_after%E8%BC%95%E9%AC%86%E5%AE%8C%E6%88%90%E7%B6%B2%E9%A0%81%E7%9A%84%E9%BB%9E%E7%B6%B4%E5%92%8C%E7%B7%9A%E6%AE%B5\"><\/span>\u507d\u5143\u7d20::before\u6216::after\u8f15\u9b06\u5b8c\u6210\u7db2\u9801\u7684\u9ede\u7db4\u548c\u7dda\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%B6%B2%E9%A0%81%E7%9A%84%E9%BB%9E%E7%B6%B4%E5%92%8C%E7%B7%9A%E6%AE%B5%E7%AF%84%E4%BE%8B\"><\/span><strong>\u7db2\u9801\u7684\u9ede\u7db4\u548c\u7dda\u6bb5\u7bc4\u4f8b<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5be6\u969b\u5230Pinterest\u627e\u4e00\u500b\u6709\u6240\u8b02\u7684\u6a19\u984c\u65c1\u9ede\u7db4\u5143\u7d20\uff0c\u50cf\u4e0b\u5716\u4e2d&#8221;HOME &gt;&gt; 99 INSPIRATIONAL&#8230;&#8221;\u90a3\u6bb5\u4e0b\u65b9<strong>\u6a58\u8272\u9577\u65b9\u9ad4<\/strong>\uff0c\u9019\u5c31\u53ef\u4ee5\u7528\u507d\u5143\u7d20\u5c07\u5b83\u88fd\u9020\u51fa\u4f86\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"734\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me3-1.jpg?resize=1024%2C734&#038;ssl=1\" alt=\"\u7db2\u9801\u7bc4\u4f8b\" class=\"wp-image-1290\" title=\"\u7db2\u9801\u7bc4\u4f8b\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me3-1.jpg?w=1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me3-1.jpg?resize=300%2C215&amp;ssl=1 300w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me3-1.jpg?resize=768%2C551&amp;ssl=1 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><figcaption><a href=/index.html"https:\/\/www.designerpeople.com\/blog\/website-design\/99-website-design-templates\/\" target=\"_blank\" rel=\"noreferrer noopener\">DesignerPeople<\/a> &#8211; Pinterest<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%85%8D%E5%90%88%E7%9B%B8%E5%B0%8D%E4%BD%8D%E7%BD%AE%E8%A8%AD%E5%AE%9A%EF%BC%8C%E5%81%BD%E5%85%83%E7%B4%A0%E9%9A%A8%E4%BD%A0%E6%94%BE%EF%BC%81\"><\/span><strong>\u914d\u5408\u76f8\u5c0d\u4f4d\u7f6e\u8a2d\u5b9a\uff0c\u507d\u5143\u7d20\u96a8\u4f60\u653e\uff01<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u9084\u4e0d\u6e05\u695a\u76f8\u5c0d\u4f4d\u7f6eposition\u7684relative\u548cabsolute\u5982\u4f55\u8a2d\u5b9a\u55ce\uff1f<br>\u5efa\u8b70\u5148\u5230<a href=/index.html"https:\/\/\/css-position-relative-absolute\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u4e0b\u65b9\u6587\u7ae0<\/a>\u7df4\u7fd2\u770b\u770b\u6bd4\u8f03\u5bb9\u6613\u770b\u5f97\u61c2\u5466\uff01<\/p>\n\n\n\n<p>(\u5ef6\u4f38\u95b1\u8b80\uff1a<a href=/index.html"https:\/\/\/css-position-relative-absolute\/\" target=\"_blank\" rel=\"noreferrer noopener\">CSS position \u5c6c\u6027\u6559\u5b78\uff1arelative\u548cabsolute\u5be6\u4f5c<\/a>)<\/p>\n\n\n\n<p>\u90a3\u6211\u5011\u5c07\u525b\u525b\u7684HTML\u6539\u6210\u5716\u7247\u4e0a\u7684\u90a3\u4e32\u82f1\u6587\uff0c\u4e26\u5148\u5c07CSS\u7559\u7a7a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><span style=\"color:#929292\" class=\"has-inline-color\">&lt;!-- HTML --&gt;<\/span>\n\n&lt;div class=\"intro\"&gt;HOME &gt;&gt; 99 INSPIRATIONAL WEBSITE DESIGN TEMPLATES FOR 2020&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<p>\u5448\u73fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"666\" height=\"98\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me4.png?resize=666%2C98&#038;ssl=1\" alt=\"\u7bc4\u4f8bHTML\u57fa\u672c\u8a2d\u5b9a\" class=\"wp-image-1293\" title=\"\u7bc4\u4f8bHTML\u57fa\u672c\u8a2d\u5b9a\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me4.png?w=666&amp;ssl=1 666w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me4.png?resize=300%2C44&amp;ssl=1 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" data-recalc-dims=\"1\" \/><figcaption>\u7bc4\u4f8bHTML\u57fa\u672c\u8a2d\u5b9a<\/figcaption><\/figure>\n\n\n\n<p>\u63a5\u4e0b\u4f86\u6211\u5011\u5c07CSS\u90e8\u5206\u5b8c\u6210\uff1a<\/p>\n\n\n\n<p>\u9019\u88e1\u5148\u4f86\u500b<strong>\u5c0f\u63d0\u9192<\/strong>\uff0c\u5c31\u7b97\u6c92\u6709\u4f7f\u7528\u5230content\u5c6c\u6027\uff0c\u4e5f\u4e00\u5b9a\u8981\u5beb\u9019\u500b\u5c6c\u6027\uff0c<strong>content\u5c6c\u6027\u548c::before\u3001::after\u662f\u751f\u547d\u5171\u540c\u9ad4\uff01<\/strong><br>\u96d9\u5f15\u865f\u5167\u5bb9\u7559\u7a7a\u4e5f\u6c92\u95dc\u4fc2\uff0c\u4f46\u662f<strong>\u4e0d\u5beb\u7684\u8a71\u5c31\u4e0d\u6703\u6709\u4f5c\u7528\u5466\uff01<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><span style=\"color:#929292\" class=\"has-inline-color\">\/* CSS *\/<\/span>\n\n<span style=\"color:#929292\" class=\"has-inline-color\">\/*\u90a3\u6574\u584a&lt;div&gt;\u6a19\u7c64*\/<\/span>\n.intro{\n  position: relative; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5c07\u6574\u584a&lt;div&gt;\u7576\u4f5c\u57fa\u6e96\u4f4d\u7f6e*\/<\/span>\n  width: 516px; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u8a2d\u5b9a\u5bec\u5ea6\uff0c\u8b93\u507d\u5143\u7d20\u7684\u5bec\u5ea6\u76f4\u63a5\u8a2d100%*\/<\/span>\n}\n\n<span style=\"color:#929292\" class=\"has-inline-color\">\/*\u65b0\u589e\u7684\u507d\u5143\u7d20*\/<\/span>\n.intro::before{\n  content: \"\"; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u6c92\u7528\u5230\u4ecd\u7136\u8981\u5beb\uff0c\u96d9\u5f15\u865f\u5167\u5bb9\u7559\u7a7a*\/<\/span>\n  width: 100%; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u8a2d\u5b9a\u9577\u65b9\u5f62\u5bec\u5ea6*\/<\/span>\n  height: 10px; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u8a2d\u5b9a\u9577\u65b9\u5f62\u9ad8\u5ea6*\/<\/span>\n  background: #ff7600; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u8a2d\u5b9a\u9577\u65b9\u5f62\u984f\u8272*\/<\/span>\n  position: absolute; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u8a2d\u5b9a\u8207&lt;div&gt;\u5340\u584a\u7684\u76f8\u5c0d\u4f4d\u7f6e*\/<\/span>\n  left: 0px; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5f9e&lt;div&gt;\u5340\u584a\u5de6\u4e0a\u89d2\u8d77\u7b97\uff0c\u8207\u5de6\u908a\u8ddd\u96e2\u70ba0\uff0c\u5373\u9760\u5de6\u7684\u610f\u601d*\/<\/span>\n  top: 100%; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5f9e&lt;div&gt;\u5340\u584a\u5de6\u4e0a\u89d2\u8d77\u7b97\uff0c\u8207\u4e0a\u65b9\u8ddd\u96e2\u70ba100%\u6642\u624d\u958b\u59cb\u7522\u751f\u9019\u500b\u9577\u65b9\u5f62\uff0c\u56e0\u6b64\u9577\u65b9\u5f62\u6703\u5728\u6574\u584a&lt;div&gt;\u5340\u584a\u7684\u4e0b\u65b9*\/<\/span>\n}<\/code><\/pre>\n\n\n\n<p>\u5b8c\u6210\u6a23\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"668\" height=\"90\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me5.png?resize=668%2C90&#038;ssl=1\" alt=\"\u7bc4\u4f8b\u5b8c\u6210\u6a23\u5f0f\" class=\"wp-image-1300\" title=\"\u7bc4\u4f8b\u5b8c\u6210\u6a23\u5f0f\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me5.png?w=668&amp;ssl=1 668w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me5.png?resize=300%2C40&amp;ssl=1 300w\" sizes=\"(max-width: 668px) 100vw, 668px\" data-recalc-dims=\"1\" \/><figcaption>\u7bc4\u4f8b\u5b8c\u6210\u6a23\u5f0f<\/figcaption><\/figure>\n\n\n\n<p>\u8d85\u5feb\u901f\u7684\u5427\uff01<\/p>\n\n\n\n<p>\u5230\u9019\u908a\u96d6\u7136\u5df2\u5b8c\u6210\uff0c\u4f46\u4e5f\u8a31\u4f60\u5fc3\u4e2d\u6703\u6709\u5e7e\u500b\u7591\u60d1\uff0c\u6211\u4f86\u70ba\u5927\u5bb6\u89e3\u7b54\u4e00\u4e0b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-palette-color-4-color has-text-color wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A7%A3%E6%B1%BA%E4%BD%A0%E5%85%A7%E5%BF%83%E7%9A%84%E7%96%91%E6%83%91\"><\/span><strong>\u89e3\u6c7a\u4f60\u5167\u5fc3\u7684\u7591\u60d1<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u7b2c\u4e00\u500b\u7591\u60d1\uff1a<br>\u90a3\u5982\u679c\u662f\u7528::after\u4f86\u5beb\u7684\u8a71\u53ef\u4ee5\u55ce\uff1f<br>\u7b54\u6848\u662f<strong><span class=\"has-inline-color has-palette-color-2-color\">\u7576\u7136\u53ef\u4ee5\uff01<\/span><\/strong><\/p>\n\n\n\n<p>\u56e0\u70ba\u4e00\u65e6\u4f7f\u7528\u4e86position\u76f8\u5c0d\u4f4d\u7f6e\u5c6c\u6027\u5f8c\uff0c\u5c31\u76f4\u63a5<strong>\u64fa\u812b\u4e86\u4f60\u52a0\u7684\u5167\u5bb9\u662f\u8981\u653e\u5728\u5f8c\u9762\u9084\u662f\u524d\u9762\uff0c\u800c\u662f\u76f4\u63a5\u6309\u7167position\u76f8\u5c0d\u4f4d\u7f6e\u7684\u8a2d\u5b9a\u6539\u8b8a\u4f4d\u7f6e\u56c9\uff01<\/strong><\/p>\n\n\n\n<p>\u7b2c\u4e8c\u500b\u7591\u60d1\uff1a<br>\u70ba\u4ec0\u9ebc\u662f\u7528.intro\u9019\u500b&lt;div&gt;\u6a19\u7c64\u7576\u4f5c\u57fa\u6e96\u5462\uff1f<br>\u9019\u6642\u6211\u5011\u8981\u5230<strong>\u7db2\u9801\u7684F12\u958b\u767c\u4eba\u54e1\u5de5\u5177<\/strong>\u4f86\u770b\u770b\u4ed6\u5011\u7684\u968e\u5c64\u95dc\u4fc2\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"488\" src=/index.html"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me6.png?resize=594%2C488&#038;ssl=1\" alt=\"F12\u958b\u767c\u4eba\u54e1\u5de5\u5177\u6aa2\u67e5\" class=\"wp-image-1303\" title=\"F12\u958b\u767c\u4eba\u54e1\u5de5\u5177\u6aa2\u67e5\" srcset=\"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me6.png?w=594&amp;ssl=1 594w, https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/02\/me6.png?resize=300%2C246&amp;ssl=1 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" data-recalc-dims=\"1\" \/><figcaption>F12\u958b\u767c\u4eba\u54e1\u5de5\u5177\u6aa2\u67e5<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u5f9e\u7db2\u9801F12\u958b\u767c\u4eba\u54e1\u5de5\u5177\u6211\u5011\u53ef\u4ee5\u767c\u73fe\uff0c<strong>\u4f60\u525b\u525b\u7528CSS\u5275\u9020\u7684\u507d\u5143\u7d20::before\u5c31\u5728&lt;div&gt;\u6a19\u7c64\u7684\u4e0b\u4e00\u5c64<\/strong>\uff01<br>\u4e5f\u5c31\u662f\u8aaa\uff0c::before\u9019\u500b\u5143\u7d20\u4f60\u53ef\u4ee5\u60f3\u6210\u662f\u4e00\u500b\u6a19\u7c64\u5340\u584a\uff0c\u5957\u7528position\u76f8\u5c0d\u4f4d\u7f6e\u8a2d\u5b9a\u5f8c\uff0c\u507d\u5143\u7d20\u8a2d\u5b9aposition:absolute;\u5c6c\u6027\u5f8c\u7684\u7236\u5143\u7d20\u5c31\u662f&lt;div&gt;\u6a19\u7c64\u5340\u584a\u4e86\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u6211\u5011\u5c07&lt;div&gt;\u6a19\u7c64\u5340\u584a\u8a2d\u5b9a\u4e00\u500bposition:relative;\u5c6c\u6027\uff0c\u4f86\u4f5c\u70ba\u507d\u5143\u7d20\u7684\u57fa\u6e96\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<p>\u9019\u6a23\u4f60\u5c31\u53ef\u4ee5\u900f\u904etop\u548cleft\u7b49\u4f4d\u7f6e\u5c6c\u6027\uff0c\u4efb\u610f\u8abf\u6574\u4f60\u5275\u5efa\u7684\u507d\u5143\u7d20\u5340\u584a\u4f4d\u7f6e\u4e86\uff01<\/p>\n\n\n\n<h2 class=\"has-palette-color-4-color has-text-color has-background wp-block-heading\" style=\"background-color:#ffe1da\"><span class=\"ez-toc-section\" id=\"_before%E5%92%8C_after%E5%AF%A6%E5%8B%99%E4%B8%8A%E8%A6%81%E5%B0%8F%E5%BF%83%E7%9A%84%E5%9C%B0%E6%96%B9\"><\/span>::before\u548c::after\u5be6\u52d9\u4e0a\u8981\u5c0f\u5fc3\u7684\u5730\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4f7f\u7528\u6642\u52d9\u5fc5\u52d9\u5fc5\u8981\u5c0f\u5fc3\u7684\u5c31\u662f\uff1a<br><strong><span class=\"has-inline-color has-vivid-red-color\">::be<\/span><span class=\"has-inline-color has-palette-color-2-color\">fore\u548c::after\u4e00\u5b9a\u8981\u52a0\u5165content\u5c6c\u6027\u624d\u6703\u6709\u4f5c\u7528\uff01\uff01\uff01<\/span><\/strong><br>\u9019\u9ede\u4e00\u5b9a\u8981\u661f\u865f\u518d\u661f\u865f\u2b50\u2b50\u2b50\u2b50\u2b50<\/p>\n\n\n\n<p>\u5c31\u7b97\u6c92\u6709\u8981\u52a0\u5165\u6587\u5b57\uff0c\u4e5f\u4e00\u5b9a\u8981\u6709content\u5c6c\u6027\uff0c\u5167\u5bb9\u7559\u7a7a\u5373\u53ef\uff0c\u50cf\u9019\u6a23\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><span style=\"color:#929292\" class=\"has-inline-color\">\/* CSS *\/<\/span>\n\n.intro::before{\n  content: \"\"; <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u96d9\u5f15\u865f\u4e2d\u7559\u7a7a\uff0c\u4f46\u5fc5\u9808\u5b58\u5728*\/<\/span>\n  <span style=\"color:#929292\" class=\"has-inline-color\">\/*\u5176\u4ed6\u5c6c\u6027\u8a2d\u5b9a*\/<\/span>\n\n}<\/code><\/pre>\n\n\n\n<p><strong>\u5426\u5247\u82e5\u6c92\u6709content\u5c6c\u6027\uff0c\u4f60\u600e\u9ebc\u8a2d\u5b9a\u90fd\u662f\u7121\u6548\u7684\u5466\uff01\uff01\uff01<\/strong><\/p>\n\n\n\n<p>\u5c31\u9023\u6211\u4e4b\u524d\u5beb\u7684\u6642\u5019\u5076\u723e\u4e5f\u6703\u5fd8\u8a18\uff0c\u7136\u5f8c\u518d\u90a3\u908adebug\u8001\u534a\u5929\u751a\u81f3\u9084\u91cd\u8907\u6e05\u6389cookie\uff0c\u61ca\u60f1\u70ba\u4f55\u6c92\u6709\u6548\u679c\uff0c\u6700\u5f8c\u624d\u767c\u73fecontent\u5c6c\u6027\u6c92\u52a0\u5230\u507d\u5143\u7d20\u7684\u8a2d\u5b9a\u4e2d\u6240\u4ee5\u7121\u6548\uff0c\u771f\u7684\u662f\u8cbb\u5fc3\u53c8\u8017\u6642\u554a\uff01<\/p>\n\n\n\n<h2 class=\"has-palette-color-4-color has-text-color has-background wp-block-heading\" style=\"background-color:#ffe1da\"><span class=\"ez-toc-section\" id=\"%E7%B8%BD%E7%B5%90\"><\/span>\u7e3d\u7d50<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662f\u6700\u57fa\u790e\u3001\u6700\u57fa\u790e\u7684\u507d\u5143\u7d20::before\u548c::after\u4ecb\u7d39\uff0c\u5e0c\u671b\u7d93\u904e\u9019\u4e9b<strong>\u6700\u57fa\u672c\u7684\u8aaa\u660e\u8207\u7bc4\u4f8b\u5be6\u4f5c\uff0c<\/strong>\u8b93\u5927\u5bb6\u4e0d\u7528\u50cf\u6211\u4e00\u6a23\u82b1\u5927\u628a\u6642\u9593\u9084\u4e00\u76f4\u641e\u4e0d\u61c2\u9019\u5728\u5e79\u561b\uff01<\/p>\n\n\n\n<p>\u800c\u507d\u5143\u7d20\u7684\u61c9\u7528\u8d85\u7d1a\u5ee3\u6cdb\uff0c\u9084\u80fd\u5305\u522e\u7528\u507d\u5143\u7d20\u5275\u5efa\u4e00\u500b\u5927\u65bc\u7b26\u865f\u7684\u7bad\u982d\uff0c\u53ea\u8981::before\u548c::after\u5206\u5225\u7522\u51fa\u4e00\u500b\u9577\u65b9\u5f62\u4e26\u50be\u659c\uff0c\u5c31\u80fd\u7522\u51fa\u4e00\u500b\u7d14\u7a0b\u5f0f\u78bc\u7684\u7bad\u982d\u56c9\uff01<\/p>\n\n\n\n<p>\u6240\u4ee5\u4e00\u65e6\u4f60\u5b78\u6703\u507d\u5143\u7d20::before\u548c::after\u7684\u61c9\u7528\uff0c\u5b83\u7684\u512a\u9ede\u5c31\u662f<strong>\u81ea\u7531\u5ea6\u6975\u9ad8\uff01\uff01<\/strong><br>\u9084\u6709\u53ea\u8981\u4f60\u6709\u4e00\u500bHTML\u6a19\u7c64\u4f5c\u70ba\u57fa\u5e95\uff0c\u6bcf\u4e00\u500b\u6a19\u7c64\u4f60\u90fd\u53ef\u4ee5\u5efa\u7acb::before\u548c::after\u5169\u500b\u65b0\u7684\u5340\u584a\u51fa\u4f86\uff0c\u8b93\u4f60<strong>\u4e0d\u7528\u4fee\u6539HTML\u5c31\u80fd\u5b8c\u6210\u4e00\u5806\u5be6\u7528\u7684\u6548\u679c\u56c9\uff01<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul><li><a href=/index.html"https:\/\/\/btn-with-font-awesome\/\" target=\"_blank\" rel=\"noreferrer noopener\">Font Awesome\u6559\u5b78-Icon\u5716\u793a\u53d6\u4ee3\u6587\u5b57\u7684\u6309\u9215<\/a><\/li><li><a href=/index.html"https:\/\/\/css-position-relative-absolute\/\" target=\"_blank\" rel=\"noreferrer noopener\">CSS position \u5c6c\u6027\u6559\u5b78\uff1arelative\u548cabsolute\u5be6\u4f5c<\/a><\/li><li><a href=/index.html"https:\/\/\/tab-css-change\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u7d14CSS\u88fd\u4f5cHTML\u9801\u7c64\u5207\u63db\u7684\u6548\u679c\u8207\u5be6\u4f8b<\/a><\/li><li><a href=/index.html"https:\/\/\/rwd-two-line\/\" target=\"_blank\" rel=\"noreferrer noopener\">RWD\u6559\u5b78-\u53ea\u8981\u5169\u884c\u5c31\u80fd\u8f15\u9b06\u898b\u6548\u7684\u5be6\u4f5c\u7d93\u9a57<\/a><\/li><li><a href=/index.html"https:\/\/\/radio-button-and-checkbox-customize\/\" target=\"_blank\" rel=\"noreferrer noopener\">Radio button\u548cCheckbox\u653e\u5927\u4e26\u81ea\u8a02\u6a23\u5f0f<\/a><\/li><\/ul>\n\n\n\n<script async=\"\" src=/index.html"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<!-- square ads -->\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-5595715547350173\" data-ad-slot=\"7241372607\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u9ebc\u662f ::before \u548c::after\uff1fCSS\u7684\u507d\u5143\u7d20\u662f\u4e00\u500b\u53ef\u4ee5\u7528CSS\u300c\u6191\u7a7a\u5275\u9020\u300d\u4e00\u500b\u5340\u584a\u51fa\u4f86\uff0c\u800c\u4e14\u5728HTML\u7a0b\u5f0f\u78bc\u5f8c\u53f0\u4f60\u4e26\u4e0d\u6703\u770b\u5230\u5b83\u5b58\u5728\uff0c\u4f46\u5728\u7db2\u9801F12\u958b\u767c\u4eba\u54e1\u5de5\u5177\u6642\u53ef\u4ee5\u770b\u5230\u3002\u5e0c\u671b\u7d93\u904e\u9019\u4e9b\u6700\u57fa\u672c\u7684\u8aaa\u660e\u8207\u7bc4\u4f8b\u5be6\u4f5c\uff0c\u5e36\u5927\u5bb6\u5b78\u6703CSS\u507d\u5143\u7d20::before\u548c::after\uff01<\/p>\n","protected":false},"author":1,"featured_media":1319,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[10,7],"tags":[131,130,133,132,54,78,129,128,135,117],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/\/wp-content\/uploads\/2021\/03\/monitor-1307227_1920.jpg?fit=1920%2C1355&ssl=1","_links":{"self":[{"href":"https:\/\/\/wp-json\/wp\/v2\/posts\/1264"}],"collection":[{"href":"https:\/\/\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/\/wp-json\/wp\/v2\/comments?post=1264"}],"version-history":[{"count":8,"href":"https:\/\/\/wp-json\/wp\/v2\/posts\/1264\/revisions"}],"predecessor-version":[{"id":2322,"href":"https:\/\/\/wp-json\/wp\/v2\/posts\/1264\/revisions\/2322"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/\/wp-json\/wp\/v2\/media\/1319"}],"wp:attachment":[{"href":"https:\/\/\/wp-json\/wp\/v2\/media?parent=1264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/\/wp-json\/wp\/v2\/categories?post=1264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/\/wp-json\/wp\/v2\/tags?post=1264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}