{"id":2626,"date":"2021-05-17T16:03:55","date_gmt":"2021-05-17T07:03:55","guid":{"rendered":"https:\/\/design.coeure.co.jp\/blog\/?p=2626"},"modified":"2026-04-13T13:32:54","modified_gmt":"2026-04-13T04:32:54","slug":"programming-14","status":"publish","type":"post","link":"https:\/\/design.coeure.co.jp\/blog\/webmarketing\/homepage\/programming-14","title":{"rendered":"\u30ab\u30b9\u30b1\u30fc\u30c9\u3068\u8a73\u7d30\u5ea6\uff0d\u521d\u5fc3\u8005\u3082\u3067\u304d\u308b\uff01\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u57fa\u790e\u8b1b\u5ea7\u3010\u7b2c14\u56de\u3011"},"content":{"rendered":"\n<p>\u30b7\u30ea\u30fc\u30ba\u7b2c14\u56de\u306f\u3001CSS\u306e\u30ab\u30b9\u30b1\u30fc\u30c9\u3068\u8a73\u7d30\u5ea6\u306b\u3064\u3044\u3066\u3067\u3059\u3002\u3053\u3053\u3092\u7406\u89e3\u3057\u3066\u304a\u3051\u3070\u3001CSS\u304c\u3046\u307e\u304f\u5f53\u305f\u3089\u306a\u3044\u3068\u3044\u3046\u6642\u306e\u539f\u56e0\u7a76\u660e\u304c\u98db\u8e8d\u7684\u306b\u65e9\u304f\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3001\u3053\u306e\u6982\u5ff5\u306f\u8907\u96d1\u3067\u3059\u3079\u3066\u3092\u8aac\u660e\u3057\u305f\u308a\u7406\u89e3\u3059\u308b\u306e\u306f\u5927\u5909\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u3053\u3060\u3051\u304a\u3055\u3048\u3066\u304a\u3051\u3070\u307b\u307c\u307b\u307cOK\uff01\u3068\u3044\u3046\u70b9\u3060\u3051\u306b\u7d5e\u3063\u3066\u3001\u304b\u3093\u305f\u3093\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">\u30ab\u30b9\u30b1\u30fc\u30c9\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>\u304b\u3093\u305f\u3093\u306b\u8a00\u3048\u3070\u3001CSS\u306e<strong>\u30b9\u30bf\u30a4\u30eb\u9069\u7528\u306e\u9806\u5e8f<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f8c\u66f8\u304d\u512a\u5148<\/h3>\n\n\n\n<p>\u57fa\u672c\u7684\u306b\u306f\u3001\u8a18\u8ff0\u306e\u5f8c\u66f8\u304d\u304c\u512a\u5148\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u540c\u3058h1\u8981\u7d20\u306b\u5bfe\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306bCSS\u3067\u30b9\u30bf\u30a4\u30eb\u3092\u8a18\u8ff0\u3057\u305f\u3068\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"636\" height=\"313\" src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade001.jpg\" alt=\"\" class=\"wp-image-2627\" srcset=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade001.jpg 636w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade001-300x148.jpg 300w\" sizes=\"(max-width: 636px) 100vw, 636px\" \/><\/figure>\n\n\n\n\n\n\n\n<p>h1\u306b\u5bfe\u3057\u3066color\u304c3\u3064\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u4e00\u756a\u6700\u5f8c\u306b\u66f8\u304b\u308c\u3066\u3044\u308bgreen\u304c\u512a\u5148\u3055\u308c\u308b\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002\u5f8c\u66f8\u304d\u512a\u5148\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u9806\u5e8f\u3092\u6c7a\u5b9a\u3059\u308b\u8981\u7d20\u306f\u305d\u308c\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u524d\u56de\u3082\u5c11\u3057\u51fa\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30b9\u30bf\u30a4\u30eb\u3092\u3042\u3066\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306fuser agent stylesheet\u3068\u547c\u3070\u308c\u3001\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b9\u30bf\u30a4\u30eb\u3068\u81ea\u5206\uff08\u4f5c\u6210\u8005\uff1aauther\uff09\u304c\u66f8\u3044\u305fCSS\u304c\u91cd\u8907\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3046\u3044\u3063\u305f\u5834\u5408\u3001\u3069\u306e\u30b9\u30bf\u30a4\u30eb\u3092\u512a\u5148\u3059\u308b\u306e\u304b\u9806\u4f4d\u3092\u6c7a\u3081\u3066\u3044\u308b\u306e\u304c\u30ab\u30b9\u30b1\u30fc\u30c9\u306e\u6982\u5ff5\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">\u30ab\u30b9\u30b1\u30fc\u30c9\u9806<\/h2>\n\n\n\n<p>\u30ab\u30b9\u30b1\u30fc\u30c9\u306f\u8907\u96d1\u3067\u7406\u89e3\u3059\u308b\u306e\u304c\u96e3\u3057\u3044\u3067\u3059\u3002\u3067\u3082\u3001\u3053\u308c\u307e\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8b1b\u5ea7\u3067\u8003\u3048\u3066\u304d\u305f\u901a\u308a\u3001<strong>\u6700\u521d\u306f\u57fa\u672c\u7684\u306a\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u308c\u3070OK<\/strong>\u3067\u3059\u3002\u5206\u304b\u3089\u306a\u3044\u6642\u306b\u8abf\u3079\u3066\u3044\u3051\u3070\u3001\u3060\u3093\u3060\u3093\u7406\u89e3\u304c\u6df1\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/CSS\/Cascade\">MDN\u3067CSS\u306e\u30ab\u30b9\u30b1\u30fc\u30c9<\/a>\u3092\u8abf\u3079\u308b\u3068\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u9806\u306e\u8868\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"975\" height=\"639\" src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade002.jpg\" alt=\"\" class=\"wp-image-2628\" srcset=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade002.jpg 975w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade002-300x197.jpg 300w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade002-768x503.jpg 768w\" sizes=\"(max-width: 975px) 100vw, 975px\" \/><\/figure>\n\n\n\n\n\n\n\n<p>\u3053\u306e\u8868\u3082\u3059\u3079\u3066\u3092\u8aac\u660e\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u304c\u3001\u5de6\u5074\u306b1\uff5e8\u307e\u3067\u306e\u6570\u5b57\u304c\u3042\u308a\u307e\u3059\u3002\u6570\u5b57\u304c\u5927\u304d\u304f\u306a\u308c\u3070\u3001\u305d\u308c\u3060\u3051\u30ab\u30b9\u30b1\u30fc\u30c9\u9806\u304c\u4e0a\u304c\u308a\u3001\u512a\u5148\u3057\u3066\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001\u3053\u306e\u3046\u3061<strong>1\u30683<\/strong>\u3067\u3059\u3002\u5148\u7a0b\u3082\u89e6\u308c\u305f<strong>\u30e6\u30fc\u30b6\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8<\/strong>\uff08\u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u3066\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u30b9\u30bf\u30a4\u30eb\u304c\u3042\u3063\u3066\u3082\u3001<strong>\u4f5c\u6210\u8005<\/strong>\uff08\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u3067\u3042\u308b\u81ea\u5206\uff09\u304c\u66f8\u3044\u305f\u30b9\u30bf\u30a4\u30eb\u306e\u307b\u3046\u304c\u512a\u5148\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3061\u306a\u307f\u306b\u3001<strong>2<\/strong>\u306e<strong>\u30e6\u30fc\u30b6\u30fc<\/strong>\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u3053\u3068\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u4e0a\u3084\u30d6\u30e9\u30a6\u30b6\u306e\u62e1\u5f35\u6a5f\u80fd\u3067\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u305f\u3060\u3001\u4f5c\u6210\u8005\u306e\u307b\u3046\u304c\u30ab\u30b9\u30b1\u30fc\u30c9\u9806\u3067\u512a\u5148\u3055\u308c\u308b\u306e\u3067\u3001\u305d\u308c\u307b\u3069\u6c17\u306b\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list is-style-num_circle\">\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\uff08\u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/strong><\/li>\n\n\n\n<li><strong>\u30e6\u30fc\u30b6\u30fc\uff08\u30d6\u30e9\u30a6\u30b6\u306e\u30e6\u30fc\u30b6\u30fc\uff09<\/strong><\/li>\n\n\n\n<li><strong>\u4f5c\u6210\u8005\uff08\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u3067\u3042\u308b\u81ea\u5206\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u3068\u3044\u3046\u9806\u756a\u3067\u512a\u5148\u3055\u308c\u308b\u3053\u3068\u304c\u5206\u304b\u3063\u3066\u3044\u308c\u3070OK\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u91cd\u8981\u5ea6\u306e\u6b04\u306b\u3001!important \u3068\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u512a\u5148\u9806\u4f4d\u306e5\uff5e7\u306e\u90e8\u5206\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u63a8\u5968\u3055\u308c\u3066\u3044\u306a\u3044\u65b9\u6cd5\u3067\u3059\u304c\u3001!important \u3067\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u3068 normal\u3088\u308a\u3082\u512a\u5148\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u6700\u7d42\u624b\u6bb5\u7684\u306a\u66f8\u304d\u65b9\u3067\u591a\u7528\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u65b9\u6cd5\u3067\u3059\u306e\u3067\u3001\u3053\u3053\u3067\u899a\u3048\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u3093\u306a\u8aac\u660e\u3082\u3042\u3063\u305f\u306a\u2026\u304f\u3089\u3044\u3067\u8a18\u61b6\u306b\u7559\u3081\u3066\u304a\u3051\u3070\u5927\u4e08\u592b\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u7c21\u5358\u306b\u307e\u3068\u3081\u3066\u307f\u308b\u3068\u3001\u6700\u521d\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3067\u30b9\u30bf\u30a4\u30eb\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u3066\u3082\u3001\u4f5c\u6210\u8005\u3067\u3042\u308b\u81ea\u5206\u304c\u30b9\u30bf\u30a4\u30eb\u3092\u5f8c\u66f8\u304d\u3059\u308c\u3070\u3001\u305d\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u512a\u5148\u3055\u308c\u308b\u3068\u3068\u3089\u3048\u3066\u304a\u3051\u3070OK\u3067\u3059\u3002\u88cf\u3092\u8fd4\u305b\u3070\u3001\u81ea\u5206\u304c\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3057\u3066\u3044\u306a\u3044\u306e\u306b\u610f\u56f3\u3057\u306a\u3044\u30b9\u30bf\u30a4\u30eb\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u7591\u3063\u3066\u307f\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u3053\u308c\u306f\u524d\u56de\u306e\u8b1b\u5ea7\u3067\u89e3\u8aac\u3057\u305f\u70b9\u3067\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type2\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u95a2\u9023\u8a18\u4e8b<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img decoding=\"async\" src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/02\/programming000-300x169.jpg\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/design.coeure.co.jp\/blog\/webmarketing\/homepage\/programming-13\" target=\"_blank\" rel=\"noopener noreferrer\">\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u306e\u78ba\u8a8d\u3068\u7de8\u96c6\uff0d\u521d\u5fc3\u8005\u3082\u3067\u304d\u308b\uff01\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u57fa\u790e\u8b1b\u5ea7\u3010\u7b2c13\u56de\u3011<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">\u30b7\u30ea\u30fc\u30ba\u7b2c13\u56de\u306f\u3001Google chrome\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u8868\u793a\u306e\u78ba\u8a8d\u3068\u7de8\u96c6\u3092\u3057\u3066\u307f\u307e\u3059\u3002\u3046\u307e\u304f\u8868\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u90e8\u5206\u3092\u8abf\u6574\u3059\u308b\u305f\u3081\u306b\u3001\u539f\u56e0\u7a76\u660e\u3068\u4eee\u7de8\u96c6\u3057\u3066\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3092\u66f8&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<p>\u3057\u304b\u3057\u3001\u30b9\u30bf\u30a4\u30eb\u306e\u9069\u7528\u9806\u4f4d\u306b\u5f71\u97ff\u3059\u308b\u306e\u306f\u30ab\u30b9\u30b1\u30fc\u30c9\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6b21\u306b\u8aac\u660e\u3059\u308b\u8a73\u7d30\u5ea6\u304c\u95a2\u4fc2\u3057\u3066\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">\u8a73\u7d30\u5ea6\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>\u3053\u308c\u306f\u3001 <strong>\u8907\u6570\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u6307\u5b9a\u3055\u308c\u305f\u5834\u5408\u306e\u512a\u5148\u5ea6<\/strong>\u306e\u3053\u3068\u3067\u3059\u3002\u5b9f\u969b\u306b\u3069\u306e\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3059\u308b\u304b\u3092\u30d6\u30e9\u30a6\u30b6\u304c\u5224\u65ad\u3059\u308b\u305f\u3081\u306e\u6c7a\u307e\u308a\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u540c\u3058\u8981\u7d20\u306b\u8907\u6570\u306e\u30bb\u30ec\u30af\u30bf\u3067\u30b9\u30bf\u30a4\u30eb\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u3069\u306e\u30b9\u30bf\u30a4\u30eb\u3092\u512a\u5148\u3059\u308b\u306e\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u30e9\u30f3\u30af\u4ed8\u3051\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">\u8a73\u7d30\u5ea6\u306e\u9806\u4f4d<\/h2>\n\n\n\n<p>\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001\u4ee5\u4e0b\u306e\u9806\u4f4d\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list is-style-num_circle\">\n<li><strong>id\u30bb\u30ec\u30af\u30bf\u30fc<\/strong><\/li>\n\n\n\n<li><strong>class\u30bb\u30ec\u30af\u30bf\u30fc<\/strong><\/li>\n\n\n\n<li><strong>\u8981\u7d20\u578b\u30bb\u30ec\u30af\u30bf\u30fc<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>id \uff1e class &gt; \u8981\u7d20<\/strong> \u306e\u9806\u3067\u3001id\u304c\u4e00\u756a\u30b9\u30b3\u30a2\u304c\u9ad8\u304f\u512a\u5148\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n<p><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Learn\/CSS\/Building_blocks\/Cascade_and_inheritance#specificity_2\">MDN\u306e\u30ab\u30b9\u30b1\u30fc\u30c9\u3068\u7d99\u627f<\/a>\u3092\u89e3\u8aac\u3057\u305f\u30da\u30fc\u30b8\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u30e9\u30f3\u30ad\u30f3\u30b0\u306e\u8868\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1024\" height=\"321\" src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade003-1024x321.jpg\" alt=\"\" class=\"wp-image-2629\" srcset=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade003-1024x321.jpg 1024w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade003-300x94.jpg 300w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade003-768x240.jpg 768w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade003.jpg 1351w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" 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src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade005.jpg\" alt=\"\" class=\"wp-image-2630\" srcset=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade005.jpg 798w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade005-300x15.jpg 300w, https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade005-768x38.jpg 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/figure>\n\n\n\n\n\n\n\n<p>h1\u8981\u7d20\u306bid\u3068class\u304c\u4ed8\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u3042\u3066\u307e\u3059\u3002<\/p>\n\n\n\n<p>CSS\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"820\" height=\"308\" src=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade004.jpg\" alt=\"\" class=\"wp-image-2631\" srcset=\"https:\/\/design.coeure.co.jp\/blog\/wp-content\/uploads\/2021\/05\/cascade004.jpg 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