{"id":15185,"date":"2026-07-12T10:40:45","date_gmt":"2026-07-12T01:40:45","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=15185"},"modified":"2026-07-15T17:02:16","modified_gmt":"2026-07-15T08:02:16","slug":"cc-html-id-class","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-html-id-class\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011HTML\u306eid\u3068class\u306e\u9055\u3044\u3068\u306f\uff1fCSS\u306e\u4f7f\u3044\u65b9\u30fb\u512a\u5148\u9806\u4f4d\u30fbClaude Code\u3067Web\u958b\u767a\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n<style>\n.g-flow-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;}\n.g-flow-item{background:linear-gradient(135deg,#1a1a1a,#2a1015);color:#fff;border-radius:8px;padding:16px 14px;min-width:130px;flex:1;text-align:center;}\n.g-flow-arrow{color:#dc2626;font-size:20px;font-weight:700;}\n.g-card-row{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 32px;}\n.g-card-row>div{flex:1;min-width:220px;}\n@media(max-width:600px){\n  .g-flow-row{flex-direction:column;}\n  .g-flow-arrow{transform:rotate(90deg);}\n  .g-card-row{flex-direction:column;}\n  .g-card-row>div{min-width:100%;}\n}\n<\/style>\n\n\n\n<div style=\"margin:0 0 32px;\">\n  <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/07\/thumb-cc-html-id-class-1.jpg\" alt=\"\u30102026\u5e747\u6708\u6700\u65b0\u3011HTML\u306eid\u3068class\u306e\u9055\u3044\u3068\u306f\uff1fCSS\u306e\u4f7f\u3044\u65b9\u30fb\u512a\u5148\u9806\u4f4d\u30fbClaude Code\u3067Web\u958b\u767a\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5\" style=\"width:100%;height:auto;border-radius:12px;display:block;\">\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-radius:12px;padding:24px 28px;margin:0 0 32px;border-left:4px solid #dc2626;\">\n  <p style=\"font-size:15px;font-weight:700;color:#1a1a1a;margin:0 0 16px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9<\/p>\n  <ol style=\"margin:0;padding-left:20px;font-size:14px;line-height:2.2;list-style:none;\">\n    <li><a href=\"#sec-01\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">01<\/span>HTML\u306eid\u3068\u306f\u2500\u2500\u300c\u552f\u4e00\u306e\u8b58\u5225\u5b50\u300d\u306e\u5f79\u5272<\/a><\/li>\n    <li><a href=\"#sec-02\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">02<\/span>HTML\u306eclass\u3068\u306f\u2500\u2500\u300c\u30b0\u30eb\u30fc\u30d7\u5206\u3051\u306e\u4ed5\u7d44\u307f\u300d<\/a><\/li>\n    <li><a href=\"#sec-03\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">03<\/span>id\u3068class\u306e\u9055\u3044\u2500\u25005\u8ef8\u3067\u5b8c\u5168\u6bd4\u8f03<\/a><\/li>\n    <li><a href=\"#sec-04\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">04<\/span>CSS\u306e\u512a\u5148\u9806\u4f4d\u2500\u2500id\u3068class\u306e\u3069\u3061\u3089\u304c\u5f37\u3044\u304b<\/a><\/li>\n    <li><a href=\"#sec-05\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">05<\/span>JavaScript\u3067\u306eid\u30fbclass\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n    <li><a href=\"#sec-06\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">06<\/span>Claude Code\u3067HTML\/CSS\u4f5c\u696d\u3092\u81ea\u52d5\u5316\u3059\u308b\u65b9\u6cd5<\/a><\/li>\n    <li><a href=\"#sec-07\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">07<\/span>\u3010\u72ec\u81ea\u30c7\u30fc\u30bf\u3011GENAI\u306eHTML\/CSS\u81ea\u52d5\u5316\u4e8b\u4f8b<\/a><\/li>\n    <li><a href=\"#faq\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">FAQ<\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n  <\/ol>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cHTML\u306eid\u3068class\u3063\u3066\u4f55\u304c\u9055\u3046\u306e\uff1f\u300d\u2014\u2014Web\u5236\u4f5c\u3084HTML\u5b66\u7fd2\u3092\u59cb\u3081\u308b\u3068\u3001\u65e9\u3044\u6bb5\u968e\u3067\u3053\u306e2\u3064\u306e\u6982\u5ff5\u3092\u5b66\u3076\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u3082HTML\u30bf\u30b0\u306b\u4ed8\u3051\u308b\u300c\u76ee\u5370\u300d\u3067\u3059\u304c\u3001<strong>\u4f7f\u3048\u308b\u5834\u6240\u30fbCSS\u306e\u512a\u5148\u9806\u4f4d\u30fbJavaScript\u3068\u306e\u95a2\u4fc2<\/strong>\u306b\u660e\u78ba\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001id\u3068class\u306e\u9055\u3044\u30925\u8ef8\u3067\u5fb9\u5e95\u6bd4\u8f03\u3057\u306a\u304c\u3089\u3001CSS\u306e\u512a\u5148\u9806\u4f4d\u30fbJavaScript\u3067\u306e\u4f7f\u3044\u65b9\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002\u3055\u3089\u306b2026\u5e74\u306e\u8996\u70b9\u3068\u3057\u3066\u3001<strong>\u300cHTML\/CSS\u3092\u30bc\u30ed\u304b\u3089\u66f8\u304b\u306a\u304f\u3066\u3082\u3001Claude Code\u306b\u65e5\u672c\u8a9e\u3067\u6307\u793a\u3059\u308b\u3060\u3051\u3067Web\u30da\u30fc\u30b8\u3092\u4f5c\u308c\u308b\u6642\u4ee3\u306b\u306a\u3063\u3066\u3044\u308b\u300d<\/strong>\u3068\u3044\u3046\u73fe\u5b9f\u306b\u3064\u3044\u3066\u3082\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u3067\u306f\u3001\u30d6\u30ed\u30b0\u8a18\u4e8b\u30fbLP\u30da\u30fc\u30b8\u30fb\u793e\u5185\u30c4\u30fc\u30eb\u306eHTML\/CSS\u4f5c\u696d\u306e\u5927\u90e8\u5206\u3092Claude Code\u306b\u81ea\u52d5\u751f\u6210\u3055\u305b\u3066\u3044\u307e\u3059\u3002HTML\u3092\u624b\u66f8\u304d\u3059\u308b\u6642\u9593\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3067\u304d\u305f\u4e8b\u4f8b\u3082\u5408\u308f\u305b\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001id\u306f\u300c\u30da\u30fc\u30b8\u306b1\u3064\u3057\u304b\u306a\u3044\u91cd\u8981\u306a\u8981\u7d20\u300d\u306b\u3001class\u306f\u300c\u540c\u3058\u30b9\u30bf\u30a4\u30eb\u3092\u8907\u6570\u306e\u8981\u7d20\u306b\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u300d\u306b\u4f7f\u3044\u307e\u3059\u3002\u3053\u306e\u4f7f\u3044\u5206\u3051\u3092\u7406\u89e3\u3059\u308b\u3060\u3051\u3067\u3001HTML\u3068CSS\u306e\u4f5c\u696d\u52b9\u7387\u304c\u5927\u5e45\u306b\u4e0a\u304c\u308a\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u3055\u3089\u306b2026\u5e74\u73fe\u5728\u3001Claude Code\u3092\u4f7f\u3048\u3070HTML\u3084CSS\u3092\u81ea\u5206\u3067\u66f8\u304b\u306a\u304f\u3066\u3082\u300c\u3053\u306e\u30c7\u30b6\u30a4\u30f3\u306e\u30da\u30fc\u30b8\u3092\u4f5c\u3063\u3066\u300d\u300c\u3053\u3053\u306b\u30dc\u30bf\u30f3\u3092\u8ffd\u52a0\u3057\u3066\u300d\u3068\u3044\u3046\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3060\u3051\u3067\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u4eca\u65e5\u306f\u305d\u306e\u4e21\u65b9\u3092\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>id\u3068class\u306e\u57fa\u672c\u7684\u306a\u5b9a\u7fa9<\/strong>\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u300c\u5f79\u5272\u306e\u9055\u3044\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>5\u8ef8\u3067\u306e\u5b8c\u5168\u6bd4\u8f03<\/strong>\u2500\u2500\u552f\u4e00\u6027\u30fbCSS\u30bb\u30ec\u30af\u30bf\u30fb\u512a\u5148\u9806\u4f4d\u30fbJavaScript\u30a2\u30af\u30bb\u30b9\u30fbSEO\u5f71\u97ff<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>CSS\u306e\u512a\u5148\u9806\u4f4d\uff08\u8a73\u7d30\u5ea6\uff09<\/strong>\u2500\u2500id\u3068class\u3069\u3061\u3089\u304c\u300c\u5f37\u3044\u300d\u306e\u304b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>JavaScript\u3067\u306e\u4f7f\u3044\u5206\u3051<\/strong>\u2500\u2500getElementById vs getElementsByClassName<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Claude Code\u3067HTML\/CSS\u3092\u81ea\u52d5\u751f\u6210<\/strong>\u3059\u308b\u5177\u4f53\u7684\u306a\u65b9\u6cd5<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>GENAI\u3067\u306e\u81ea\u52d5\u5316\u4e8b\u4f8b<\/strong>\u2500\u2500HTML\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u5de5\u6570\u306e\u524a\u6e1b\u5b9f\u7e3e<\/span><\/div>\n\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-01\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">01<\/span>\n  <span class=\"section-label\" style=\"display:block;\">HTML id<\/span>\n  <span class=\"section-title\" style=\"display:block;\">HTML\u306eid\u3068\u306f\u2500\u2500\u300c\u552f\u4e00\u306e\u8b58\u5225\u5b50\u300d\u306e\u5f79\u5272<\/span>\n  <span class=\"section-desc\">1\u3064\u306e\u30da\u30fc\u30b8\u306b1\u3064\u3060\u3051\u4f7f\u3048\u308b\u3001\u8981\u7d20\u306e\u300c\u56fa\u6709\u540d\u8a5e\u300d<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>id\u5c5e\u6027\uff08HTML\uff09<\/strong>\uff1aHTML\u306e\u8981\u7d20\u306b\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5c5e\u6027\u306e\u4e00\u3064\u30021\u3064\u306e\u30da\u30fc\u30b8\uff08HTML\u6587\u66f8\uff09\u5185\u3067<strong>\u540c\u3058id\u540d\u3092\u6301\u3064\u8981\u7d20\u306f1\u3064\u3060\u3051<\/strong>\u3068\u3044\u3046\u53b3\u683c\u306a\u30eb\u30fc\u30eb\u304c\u3042\u308a\u307e\u3059\u3002\u30da\u30fc\u30b8\u4e0a\u306e\u7279\u5b9a\u306e1\u3064\u306e\u8981\u7d20\u3092\u300c\u4ed6\u3068\u533a\u5225\u3057\u3066\u300d\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u300c\u56fa\u6709\u306e\u540d\u524d\u30bf\u30b0\u300d\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002CSS\u3067\u306f\u300c#\uff08\u30b7\u30e3\u30fc\u30d7\uff09\u300d\u30bb\u30ec\u30af\u30bf\u3067\u3001JavaScript\u3067\u306f\u300cgetElementById\u300d\u30e1\u30bd\u30c3\u30c9\u3067\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">id\u306fHTML\u306e\u8981\u7d20\u306b\u300c\u3053\u306e\u8981\u7d20\u306f\u30da\u30fc\u30b8\u4e0a\u306b1\u3064\u3060\u3051\u3042\u308b\u7279\u5225\u306a\u8981\u7d20\u3067\u3059\u300d\u3068\u5ba3\u8a00\u3059\u308b\u305f\u3081\u306e\u5c5e\u6027\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30da\u30fc\u30b8\u306e\u30d8\u30c3\u30c0\u30fc\u30fb\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30fb\u30d5\u30c3\u30bf\u30fc\u306a\u3069\u3001<strong>1\u30da\u30fc\u30b8\u306b\u5fc5\u305a1\u7b87\u6240\u3057\u304b\u767b\u5834\u3057\u306a\u3044\u8981\u7d20<\/strong>\u306b\u5bfe\u3057\u3066id\u3092\u4f7f\u3046\u306e\u304c\u9069\u5207\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HTML\u3067id\u3092\u8a2d\u5b9a\u3059\u308b\u66f8\u304d\u65b9\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3001\u30bf\u30b0\u306e\u4e2d\u306b `id=\"\u540d\u524d\"` \u3068\u8a18\u8ff0\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070 `&lt;header id=\"site-header\"&gt;` \u3068\u66f8\u304f\u3068\u3001\u305d\u306eheader\u30bf\u30b0\u306b\u300csite-header\u300d\u3068\u3044\u3046id\u304c\u4ed8\u304d\u307e\u3059\u3002\u3053\u306e\u300csite-header\u300d\u3068\u3044\u3046\u540d\u524d\u3092\u4f7f\u3063\u3066\u3001CSS\u3067\u88c5\u98fe\u3057\u305f\u308a\u3001JavaScript\u3067\u64cd\u4f5c\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1-1. id\u3092\u4ed8\u3051\u308b\u3079\u304d\u8981\u7d20\u306e\u4f8b<\/h3>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30da\u30fc\u30b8\u5171\u901a\u30d8\u30c3\u30c0\u30fc<\/strong>\uff1a`&lt;header id=\"header\"&gt;`\uff081\u30da\u30fc\u30b8\u306b1\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3<\/strong>\uff1a`&lt;nav id=\"global-nav\"&gt;`\uff081\u30da\u30fc\u30b8\u306b1\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\u30a8\u30ea\u30a2<\/strong>\uff1a`&lt;main id=\"main-content\"&gt;`\uff081\u30da\u30fc\u30b8\u306b1\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30b5\u30a4\u30c9\u30d0\u30fc<\/strong>\uff1a`&lt;aside id=\"sidebar\"&gt;`\uff081\u30da\u30fc\u30b8\u306b1\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30d5\u30c3\u30bf\u30fc<\/strong>\uff1a`&lt;footer id=\"footer\"&gt;`\uff081\u30da\u30fc\u30b8\u306b1\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30da\u30fc\u30b8\u5185\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u76ee\u6a19<\/strong>\uff1a`&lt;section id=\"faq\"&gt;`\uff08#faq\u3067\u30b8\u30e3\u30f3\u30d7\u5148\u306b\u4f7f\u3048\u308b\uff09<\/span><\/div>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30da\u30fc\u30b8\u5185\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306fid\u306e\u7279\u5fb4\u7684\u306a\u4f7f\u3044\u65b9\u306e\u4e00\u3064\u3067\u3059\u3002`&lt;a href=\"#faq\"&gt;FAQ\u306b\u79fb\u52d5&lt;\/a&gt;` \u3068\u3044\u3046\u30ea\u30f3\u30af\u3092\u4f5c\u308b\u3068\u3001\u30af\u30ea\u30c3\u30af\u6642\u306b `id=\"faq\"` \u3092\u6301\u3064\u8981\u7d20\u306e\u4f4d\u7f6e\u307e\u3067\u30da\u30fc\u30b8\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u307e\u3059\u3002\u3053\u306e\u6a5f\u80fd\u306fclass\u3067\u306f\u5b9f\u73fe\u3067\u304d\u306a\u3044\u305f\u3081\u3001id\u306a\u3089\u3067\u306f\u306e\u7528\u9014\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">id\u306e\u547d\u540d\u30eb\u30fc\u30eb<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">id\u540d\u306f\u82f1\u5b57\u307e\u305f\u306f\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3067\u59cb\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff08\u6570\u5b57\u59cb\u307e\u308a\u306fNG\uff09\u3002\u30cf\u30a4\u30d5\u30f3\uff08-\uff09\u3084\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\uff08_\uff09\u3001\u82f1\u6570\u5b57\u306f\u4f7f\u3048\u307e\u3059\u3002\u65e5\u672c\u8a9e\u306f\u57fa\u672c\u7684\u306b\u907f\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u6163\u7fd2\u3068\u3057\u3066\u3001\u5358\u8a9e\u306e\u533a\u5207\u308a\u306f\u30cf\u30a4\u30d5\u30f3\uff08site-header\uff09\u307e\u305f\u306f\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\uff08siteHeader\uff09\u3067\u8868\u73fe\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-02\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">02<\/span>\n  <span class=\"section-label\" style=\"display:block;\">HTML class<\/span>\n  <span class=\"section-title\" style=\"display:block;\">HTML\u306eclass\u3068\u306f\u2500\u2500\u300c\u30b0\u30eb\u30fc\u30d7\u5206\u3051\u306e\u4ed5\u7d44\u307f\u300d<\/span>\n  <span class=\"section-desc\">\u540c\u3058\u30b9\u30bf\u30a4\u30eb\u3092\u8907\u6570\u306e\u8981\u7d20\u306b\u4e00\u62ec\u9069\u7528\u3059\u308b\u305f\u3081\u306e\u300c\u30e9\u30d9\u30eb\u300d<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>class\u5c5e\u6027\uff08HTML\uff09<\/strong>\uff1aHTML\u306e\u8981\u7d20\u306b\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5c5e\u6027\u306e\u4e00\u3064\u3002id\u3068\u9055\u3044\u3001<strong>\u540c\u3058class\u540d\u3092\u8907\u6570\u306e\u8981\u7d20\u306b\u4ed8\u3051\u3066\u3082\u826f\u3044<\/strong>\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002\u300c\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u8981\u7d20\u5168\u90e8\u306b\u540c\u3058CSS\u3092\u9069\u7528\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u5834\u9762\u3067\u4f7f\u3044\u307e\u3059\u3002CSS\u3067\u306f\u300c.\uff08\u30c9\u30c3\u30c8\uff09\u300d\u30bb\u30ec\u30af\u30bf\u3067\u53c2\u7167\u3057\u307e\u3059\u30021\u3064\u306e\u8981\u7d20\u306b\u8907\u6570\u306eclass\u3092\u540c\u6642\u306b\u4ed8\u3051\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff08\u30b9\u30da\u30fc\u30b9\u533a\u5207\u308a\uff09\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">class\u306fHTML\u306e\u8981\u7d20\u3092\u30b0\u30eb\u30fc\u30d7\u306b\u5206\u985e\u3059\u308b\u305f\u3081\u306e\u5c5e\u6027\u3067\u3059\u3002\u540c\u3058class\u540d\u3092\u4f55\u5ea6\u3067\u3082\u4f7f\u3048\u308b\u305f\u3081\u3001\u300c\u30c7\u30b6\u30a4\u30f3\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u300d\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30da\u30fc\u30b8\u4e0a\u306e\u8907\u6570\u306e\u300c\u30dc\u30bf\u30f3\u300d\u306b\u540c\u3058\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u3001\u5168\u3066\u306e\u30dc\u30bf\u30f3\u306b `class=\"btn\"` \u3092\u4ed8\u3051\u3066\u304a\u3051\u3070\u3001CSS\u3067 `.btn {}` \u3068\u66f8\u304f\u3060\u3051\u3067\u4e00\u62ec\u3057\u3066\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u30011\u3064\u306e\u8981\u7d20\u306b\u8907\u6570\u306eclass\u3092\u4ed8\u3051\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002`&lt;div class=\"card featured highlight\"&gt;` \u306e\u3088\u3046\u306b\u66f8\u304f\u3068\u3001\u305d\u306e\u8981\u7d20\u306f\u300ccard\u300d\u300cfeatured\u300d\u300chighlight\u300d\u306e3\u3064\u306eclass\u3092\u6301\u3061\u3001\u305d\u308c\u305e\u308c\u306eCSS\u30b9\u30bf\u30a4\u30eb\u304c\u5168\u3066\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u67d4\u8edf\u6027\u304cclass\u306e\u5927\u304d\u306a\u5f37\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2-1. class\u3092\u4f7f\u3046\u3079\u304d\u8981\u7d20\u306e\u4f8b<\/h3>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30dc\u30bf\u30f3<\/strong>\uff1a`&lt;button class=\"btn btn-primary\"&gt;` \uff08\u30da\u30fc\u30b8\u5185\u306b\u8907\u6570\u3042\u308b\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u8a18\u4e8b\u30ab\u30fc\u30c9<\/strong>\uff1a`&lt;article class=\"card\"&gt;` \uff08\u4e00\u89a7\u30da\u30fc\u30b8\u306b\u8907\u6570\u3042\u308b\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30ea\u30f3\u30af<\/strong>\uff1a`&lt;li class=\"nav-item\"&gt;` \uff08\u8907\u6570\u306e\u9805\u76ee\u304c\u3042\u308b\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30a2\u30e9\u30fc\u30c8\u30fb\u901a\u77e5<\/strong>\uff1a`&lt;div class=\"alert alert-warning\"&gt;` \uff08\u8907\u6570\u7a2e\u985e\u30fb\u8907\u6570\u7b87\u6240\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u898b\u51fa\u3057\u88c5\u98fe<\/strong>\uff1a`&lt;h2 class=\"section-title\"&gt;` \uff08\u8907\u6570\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u898b\u51fa\u3057\uff09<\/span><\/div>\n\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">id\u3092\u300c\u4e00\u4eba\u306e\u540d\u524d\uff08\u56fa\u6709\u540d\u8a5e\uff09\u300d\u3001class\u3092\u300c\u8077\u696d\u3084\u5f79\u5272\uff08\u30b0\u30eb\u30fc\u30d7\uff09\u300d\u306b\u4f8b\u3048\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002\u300c\u7530\u4e2d\u3055\u3093\uff08id\uff09\u300d\u306f1\u4eba\u3057\u304b\u3044\u306a\u3044\u304c\u3001\u300c\u55b6\u696d\u90e8\u54e1\uff08class\uff09\u300d\u306f\u8907\u6570\u4eba\u3044\u308b\u3002\u3053\u308c\u304c\u4f7f\u3044\u5206\u3051\u306e\u30b3\u30a2\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-03\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">03<\/span>\n  <span class=\"section-label\" style=\"display:block;\">ID vs CLASS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">id\u3068class\u306e\u9055\u3044\u2500\u25005\u8ef8\u3067\u5b8c\u5168\u6bd4\u8f03<\/span>\n  <span class=\"section-desc\">\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u3092\u5224\u65ad\u3059\u308b\u305f\u3081\u306e\u6bd4\u8f03\u30c1\u30e3\u30fc\u30c8<\/span>\n<\/h2>\n\n\n\n<table>\n<thead><tr><th>\u6bd4\u8f03\u8ef8<\/th><th>id<\/th><th>class<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>1\u30da\u30fc\u30b8\u3067\u306e\u4f7f\u7528\u56de\u6570<\/td><td>1\u56de\u306e\u307f\uff08\u91cd\u8907\u7981\u6b62\uff09<\/td><td>\u4f55\u56de\u3067\u3082OK\uff08\u91cd\u8907\u53ef\u80fd\uff09<\/td><\/tr>\n<tr><td>CSS\u30bb\u30ec\u30af\u30bf<\/td><td>#\uff08\u30b7\u30e3\u30fc\u30d7\uff09\uff1a#header<\/td><td>.\uff08\u30c9\u30c3\u30c8\uff09\uff1a.card<\/td><\/tr>\n<tr><td>CSS\u512a\u5148\u9806\u4f4d<\/td><td>\u9ad8\u3044\uff08class\u3088\u308a\u5f37\u3044\uff09<\/td><td>\u4f4e\u3044\uff08id\u3088\u308a\u5f31\u3044\uff09<\/td><\/tr>\n<tr><td>1\u8981\u7d20\u3078\u306e\u8907\u6570\u4ed8\u4e0e<\/td><td>1\u8981\u7d20\u306b1id\u306e\u307f<\/td><td>1\u8981\u7d20\u306b\u8907\u6570class\u4ed8\u4e0e\u53ef\u80fd<\/td><\/tr>\n<tr><td>JavaScript\u30a2\u30af\u30bb\u30b9<\/td><td>getElementById\uff081\u8981\u7d20\uff09<\/td><td>getElementsByClassName\uff08\u8907\u6570\uff09<\/td><\/tr>\n<tr><td>\u30da\u30fc\u30b8\u5185\u30ea\u30f3\u30af\uff08\u30a2\u30f3\u30ab\u30fc\uff09<\/td><td>\u4f7f\u7528\u53ef\u80fd\uff08#id\u3067\u30b8\u30e3\u30f3\u30d7\uff09<\/td><td>\u4f7f\u7528\u4e0d\u53ef<\/td><\/tr>\n<tr><td>\u4e3b\u306a\u7528\u9014<\/td><td>\u30da\u30fc\u30b8\u306e\u69cb\u9020\u30fb\u30da\u30fc\u30b8\u5185\u30b8\u30e3\u30f3\u30d7<\/td><td>\u30c7\u30b6\u30a4\u30f3\u30fb\u30b9\u30bf\u30a4\u30eb\u306e\u9069\u7528<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u6bd4\u8f03\u8868\u3067\u6700\u3082\u5b9f\u7528\u7684\u306a\u306e\u306f\u300c<strong>CSS\u306e\u512a\u5148\u9806\u4f4d\uff08\u8a73\u7d30\u5ea6\uff09<\/strong>\u300d\u306e\u9055\u3044\u3067\u3059\u3002id\u306fclass\u3088\u308a\u3082CSS\u306e\u512a\u5148\u9806\u4f4d\u304c\u9ad8\u3044\u305f\u3081\u3001\u540c\u3058\u8981\u7d20\u306bid\u3068class\u306eCSS\u304c\u7af6\u5408\u3057\u305f\u5834\u5408\u3001id\u5074\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u52dd\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. \u4f7f\u3044\u5206\u3051\u306e\u9ec4\u91d1\u30eb\u30fc\u30eb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">id\u3068class\u306e\u4f7f\u3044\u5206\u3051\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u5224\u65ad\u57fa\u6e96\u3067\u6c7a\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\">\u305d\u306e\u8981\u7d20\u306f\n1\u30da\u30fc\u30b8\u306b1\u3064\uff1f<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">YES \u2192 id\n\u3092\u4f7f\u3046<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">NO\uff08\u8907\u6570\u3042\u308b\uff09\n\u2192 class \u3092\u4f7f\u3046<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306eWeb\u5236\u4f5c\u3067\u306f\u3001\u300c\u57fa\u672c\u306fclass\u3092\u4f7f\u3044\u3001id\u306f\u30da\u30fc\u30b8\u5185\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3084\u7279\u306b\u552f\u4e00\u6027\u304c\u91cd\u8981\u306a\u69cb\u9020\u8981\u7d20\u306b\u9650\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u904b\u7528\u304c\u591a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002CSS\u3067\u306fclass\u3067\u67d4\u8edf\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u7ba1\u7406\u3057\u3001JavaScript\u3067\u306fid\u3067\u7279\u5b9a\u306e\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u53c2\u7167\u3059\u308b\u3001\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a,#1a2520);border-radius:12px;padding:20px 24px;margin:24px 0;display:flex;align-items:center;gap:16px;color:#fff;\">\n  <span style=\"font-size:36px;\">&#127942;<\/span>\n  <div>\n    <div style=\"font-size:13px;color:#10b981;font-weight:700;letter-spacing:1px;\">VERDICT<\/div>\n    <div style=\"font-size:18px;font-weight:800;\">class \u3092\u4f7f\u3046\u3079\u304d<\/div>\n    <div style=\"font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px;\">\u30b9\u30bf\u30a4\u30eb\u9069\u7528\u76ee\u7684\u306a\u3089 class \u304c\u5b89\u5168\u3002\u67d4\u8edf\u6027\u30fb\u518d\u5229\u7528\u6027\u304c\u9ad8\u304f\u3001\u5c06\u6765\u7684\u306a\u5909\u66f4\u306b\u3082\u5bfe\u5fdc\u3057\u3084\u3059\u3044\u3002id \u306f\u30da\u30fc\u30b8\u5185\u30b8\u30e3\u30f3\u30d7\u3084JavaScript\u3067\u5358\u4e00\u8981\u7d20\u3092\u7279\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u9650\u5b9a\u3057\u3066\u4f7f\u3046\u306e\u304c\u73fe\u4ee3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3002<\/div>\n  <\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-04\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">04<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CSS SPECIFICITY<\/span>\n  <span class=\"section-title\" style=\"display:block;\">CSS\u306e\u512a\u5148\u9806\u4f4d\u2500\u2500id\u3068class\u3069\u3061\u3089\u304c\u300c\u5f37\u3044\u300d\u306e\u304b<\/span>\n  <span class=\"section-desc\">\u8a73\u7d30\u5ea6\uff08Specificity\uff09\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>CSS\u8a73\u7d30\u5ea6\uff08Specificity\uff09<\/strong>\uff1aCSS\u3067\u540c\u3058\u8981\u7d20\u306b\u8907\u6570\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u3069\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u512a\u5148\u3055\u308c\u308b\u304b\u3092\u6c7a\u3081\u308b\u30eb\u30fc\u30eb\u3002\u8a73\u7d30\u5ea6\u304c\u9ad8\u3044\u30b9\u30bf\u30a4\u30eb\u307b\u3069\u512a\u5148\u3055\u308c\u307e\u3059\u3002\u8a73\u7d30\u5ea6\u306e\u9ad8\u3044\u9806\u306b\uff1a\u30a4\u30f3\u30e9\u30a4\u30f3\u30b9\u30bf\u30a4\u30eb\uff08style\u5c5e\u6027\uff09\uff1e id \uff1e class \/ \u7591\u4f3c\u30af\u30e9\u30b9 \uff1e \u30bf\u30b0\u30bb\u30ec\u30af\u30bf\u3001\u306e\u9806\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">CSS\u306e\u8a73\u7d30\u5ea6\u306f\u6570\u5024\u3067\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002id \u306f (0,1,0,0)\u3001class \u306f (0,0,1,0)\u3001\u30bf\u30b0\u540d\u306f (0,0,0,1) \u3068\u3057\u3066\u8a08\u7b97\u3055\u308c\u307e\u3059\u3002\u3064\u307e\u308a<strong>id 1\u3064 = class 10\u500b\u5206\u306e\u512a\u5148\u5ea6<\/strong>\u3068\u3044\u3046\u5f37\u3055\u306e\u5dee\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u300cid\u306fclass\u3088\u308a\u5f37\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30bb\u30ec\u30af\u30bf<\/th><th>\u8a73\u7d30\u5ea6\u306e\u70b9\u6570<\/th><th>\u5f37\u3055\u306e\u9806\u4f4d<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>style=\"\" (\u30a4\u30f3\u30e9\u30a4\u30f3)<\/td><td>(1,0,0,0) = 1000\u70b9<\/td><td>\u6700\u5f37<\/td><\/tr>\n<tr><td>#header<\/td><td>(0,1,0,0) = 100\u70b9<\/td><td>\u5f37\u3044<\/td><\/tr>\n<tr><td>.card<\/td><td>(0,0,1,0) = 10\u70b9<\/td><td>\u4e2d\u9593<\/td><\/tr>\n<tr><td>p (\u30bf\u30b0\u540d)<\/td><td>(0,0,0,1) = 1\u70b9<\/td><td>\u5f31\u3044<\/td><\/tr>\n<tr><td>* (\u5168\u79f0)<\/td><td>(0,0,0,0) = 0\u70b9<\/td><td>\u6700\u5f31<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a73\u7d30\u5ea6\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u300cCSS\u3092\u66f8\u3044\u305f\u306e\u306b\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u30c7\u30d0\u30c3\u30b0\u306b\u6642\u9593\u3092\u53d6\u3089\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001`#header h1 { color: red; }` \u3068 `.title { color: blue; }` \u304c\u540c\u3058\u8981\u7d20\u306b\u5f53\u305f\u308b\u5834\u5408\u3001id\u3092\u542b\u3080\u524d\u8005\uff08\u8a73\u7d30\u5ea6101\u70b9\uff09\u304c\u5f8c\u8005\uff0810\u70b9\uff09\u306b\u52dd\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:20px;\">&#9888;&#65039;<\/span><strong style=\"color:#dc2626;font-size:16px;\">!important \u306e\u4e71\u7528\u306b\u6ce8\u610f<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u8a73\u7d30\u5ea6\u306e\u7af6\u5408\u3092\u5f37\u5236\u7684\u306b\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b `color: red !important;` \u3068\u66f8\u304f\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3092\u591a\u7528\u3059\u308b\u3068CSS\u306e\u7ba1\u7406\u304c\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002\u300c\u306a\u305c\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3089\u306a\u3044\u304b\u5206\u304b\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u72b6\u6cc1\u3092\u62db\u304d\u3084\u3059\u3044\u305f\u3081\u3001!important \u306f\u6700\u5f8c\u306e\u624b\u6bb5\u3068\u3057\u3066\u9650\u5b9a\u7684\u306b\u4f7f\u3046\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">CSS\u306e\u30c7\u30d0\u30c3\u30b0\u3067\u4e00\u756a\u6642\u9593\u3092\u53d6\u3089\u308c\u308b\u306e\u304c\u8a73\u7d30\u5ea6\u306e\u554f\u984c\u3067\u3059\u3002\u300cclass\u3067\u66f8\u3044\u305f\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3089\u306a\u3044\u300d\u3068\u601d\u3063\u305f\u3089\u3001\u307e\u305a\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067\u8a73\u7d30\u5ea6\u306e\u9ad8\u3044\u30b9\u30bf\u30a4\u30eb\u304c\u4e0a\u66f8\u304d\u3057\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3059\u308b\u30af\u30bb\u3092\u3064\u3051\u308b\u3068\u3001\u30c7\u30d0\u30c3\u30b0\u6642\u9593\u304c\u5927\u5e45\u306b\u77ed\u7e2e\u3055\u308c\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-05\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">05<\/span>\n  <span class=\"section-label\" style=\"display:block;\">JAVASCRIPT<\/span>\n  <span class=\"section-title\" style=\"display:block;\">JavaScript\u3067\u306eid\u30fbclass\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">DOM\u64cd\u4f5c\u3067\u306eid\u3068class\u306e\u9055\u3044\u2500\u2500\u53d6\u5f97\u3067\u304d\u308b\u8981\u7d20\u6570\u304c\u9055\u3046<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>DOM\u64cd\u4f5c\uff08JavaScript\u3067\u306eHTML\u5236\u5fa1\uff09<\/strong>\uff1aJavaScript\u304b\u3089HTML\u306e\u8981\u7d20\u3092\u53d6\u5f97\u30fb\u5909\u66f4\u30fb\u8ffd\u52a0\u30fb\u524a\u9664\u3059\u308b\u64cd\u4f5c\u306e\u3053\u3068\u3002DOM\u306fDocument Object Model\u306e\u7565\u3067\u3001HTML\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092JavaScript\u304c\u64cd\u4f5c\u3067\u304d\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u8868\u73fe\u3057\u305f\u3082\u306e\u3002id\u3084class\u3092\u4f7f\u3063\u3066\u7279\u5b9a\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3057\u3001\u30c6\u30ad\u30b9\u30c8\u30fb\u30b9\u30bf\u30a4\u30eb\u30fb\u30a4\u30d9\u30f3\u30c8\u3092\u52d5\u7684\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u304b\u3089HTML\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u969b\u3001id\u3068class\u3067\u4f7f\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u53d6\u5f97\u5bfe\u8c61<\/th><th>\u623b\u308a\u5024<\/th><th>\u4f7f\u7528\u30b1\u30fc\u30b9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>getElementById(\"id\u540d\")<\/td><td>id\u540d\u304c\u4e00\u81f4\u3059\u308b\u8981\u7d20<\/td><td>1\u3064\u306e\u8981\u7d20\uff08Element\uff09<\/td><td>id\u6307\u5b9a\u3067\u7279\u5b9a\u306e1\u8981\u7d20\u3092\u64cd\u4f5c\u3059\u308b<\/td><\/tr>\n<tr><td>getElementsByClassName(\"class\u540d\")<\/td><td>class\u540d\u304c\u4e00\u81f4\u3059\u308b\u5168\u8981\u7d20<\/td><td>\u8907\u6570\u306e\u8981\u7d20\u96c6\u5408\uff08HTMLCollection\uff09<\/td><td>\u540c\u3058class\u3092\u6301\u3064\u5168\u8981\u7d20\u3092\u4e00\u62ec\u64cd\u4f5c\u3059\u308b<\/td><\/tr>\n<tr><td>querySelector(\"#id or .class\")<\/td><td>\u6700\u521d\u306e1\u8981\u7d20<\/td><td>1\u3064\u306e\u8981\u7d20\uff08Element\uff09<\/td><td>CSS\u30bb\u30ec\u30af\u30bf\u66f8\u5f0f\u3067\u67d4\u8edf\u306b1\u8981\u7d20\u3092\u53d6\u5f97<\/td><\/tr>\n<tr><td>querySelectorAll(\".class\")<\/td><td>\u5168\u3066\u4e00\u81f4\u3059\u308b\u8981\u7d20<\/td><td>NodeList<\/td><td>CSS\u30bb\u30ec\u30af\u30bf\u66f8\u5f0f\u3067\u8907\u6570\u8981\u7d20\u3092\u53d6\u5f97<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u4ee3\u306eJavaScript\u958b\u767a\u3067\u306f\u3001`getElementById` \u3084 `getElementsByClassName` \u3088\u308a\u3001<strong>`querySelector` \/ `querySelectorAll` \u3092\u4f7f\u3046\u30d1\u30bf\u30fc\u30f3<\/strong>\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u7406\u7531\u306f\u3001CSS\u30bb\u30ec\u30af\u30bf\u3068\u540c\u3058\u66f8\u304d\u65b9\u3067\u6307\u5b9a\u3067\u304d\u308b\u305f\u3081\u76f4\u611f\u7684\u3067\u3042\u308b\u3053\u3068\u3001\u3088\u308a\u8907\u96d1\u306a\u6761\u4ef6\uff08`#nav .item.active` \u306e\u3088\u3046\u306a\u5165\u308c\u5b50\u306e\u6761\u4ef6\uff09\u3082\u66f8\u3051\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">querySelector \u306e\u5b9f\u7528\u4f8b<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">`document.querySelector(\"#form\")` \u3067id=\"form\"\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3001`document.querySelectorAll(\".btn-primary\")` \u3067class=\"btn-primary\"\u3092\u6301\u3064\u5168\u30dc\u30bf\u30f3\u3092\u53d6\u5f97\u3002`document.querySelector(\"#modal .close-btn\")` \u306e\u3088\u3046\u306b\u300c#modal\u306e\u4e2d\u306e.close-btn\u300d\u3068\u3044\u3046\u5165\u308c\u5b50\u6761\u4ef6\u3082\u76f4\u611f\u7684\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-1. \u3088\u304f\u3042\u308b\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u3067\u306eid\u3068class\u306e\u4f7f\u3044\u5206\u3051\u306f\u3001\u300c\u7279\u5b9a\u306e1\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306fid\u3001\u540c\u3058\u52d5\u4f5c\u3092\u8907\u6570\u8981\u7d20\u306b\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u306fclass\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u304c\u57fa\u672c\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e2\u30fc\u30c0\u30eb\uff08id\u4f7f\u7528\uff09<\/strong>\uff1a`document.getElementById(\"modal\")` \u3067\u7279\u5b9a\u306e\u30e2\u30fc\u30c0\u30eb\u30921\u3064\u958b\u304f\u30fb\u9589\u3058\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u5168\u30dc\u30bf\u30f3\u306e\u30a4\u30d9\u30f3\u30c8\u8a2d\u5b9a\uff08class\u4f7f\u7528\uff09<\/strong>\uff1a`querySelectorAll(\".btn\")` \u3067\u5168\u30dc\u30bf\u30f3\u306b\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u3092\u4e00\u62ec\u8a2d\u5b9a<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30bf\u30d6\u5207\u308a\u66ff\u3048\uff08id + class\u4f75\u7528\uff09<\/strong>\uff1a\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30bf\u30d6\u306eid\u3092\u53c2\u7167\u3057\u306a\u304c\u3089\u3001class\u3067\u30a2\u30af\u30c6\u30a3\u30d6\u30b9\u30bf\u30a4\u30eb\u3092\u5207\u308a\u66ff\u3048\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30d5\u30a9\u30fc\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff08id\u4f7f\u7528\uff09<\/strong>\uff1a`document.getElementById(\"email\")` \u3067\u5165\u529b\u5024\u3092\u53d6\u5f97\u3057\u3066\u691c\u8a3c<\/span><\/div>\n\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-06\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">06<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CLAUDE CODE WEB DEV<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067HTML\/CSS\u4f5c\u696d\u3092\u81ea\u52d5\u5316\u3059\u308b\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">id\u3084class\u3092\u81ea\u5206\u3067\u8003\u3048\u306a\u304f\u3066\u3082Web\u30da\u30fc\u30b8\u304c\u4f5c\u308c\u308b\u6642\u4ee3<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u3001HTML\u306eid\u3084class\u306e\u77e5\u8b58\u3092\u8e0f\u307e\u3048\u3064\u3064\u30012026\u5e74\u306e\u65b0\u3057\u3044\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<strong>Claude Code\u3092\u4f7f\u3048\u3070\u3001HTML\u3084CSS\u306e\u30b3\u30fc\u30c9\u3092\u81ea\u5206\u3067\u66f8\u304b\u305a\u306b\u3001\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3060\u3051\u3067Web\u30da\u30fc\u30b8\u3084UI\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>Claude Code\uff08Web\u958b\u767a\u3067\u306e\u5f79\u5272\uff09<\/strong>\uff1aAnthropic\u306eAI\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3002\u300c\u30d8\u30c3\u30c0\u30fc\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306eHTML\u3068CSS\u3092\u4f5c\u3063\u3066\u3002\u30ed\u30b4\u304c\u5de6\u3001\u30ea\u30f3\u30af\u304c\u53f3\u306b\u4e26\u3076\u30ec\u30a4\u30a2\u30a6\u30c8\u300d\u3068\u3044\u3046\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3060\u3051\u3067\u3001\u9069\u5207\u306aid\u30fbclass\u3092\u4ed8\u3051\u305fHTML\u30fbCSS\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u304f\u308c\u307e\u3059\u3002Claude Pro\uff08\u6708$20\uff09\u4ee5\u4e0a\u306e\u30d7\u30e9\u30f3\u306b\u8ffd\u52a0\u6599\u91d1\u306a\u3057\u3067\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cHTML\u306eid\u3068class\u3092\u7406\u89e3\u3057\u305f\u306f\u3044\u3044\u304c\u3001\u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068\u9593\u9055\u3048\u308b\u300d\u300cCSS\u306e\u8a73\u7d30\u5ea6\u3067\u8e93\u3044\u3066\u6642\u9593\u3092\u53d6\u3089\u308c\u308b\u300d\u2014\u2014Web\u5236\u4f5c\u3092\u59cb\u3081\u305f\u3070\u304b\u308a\u306e\u65b9\u3084\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u306f\u306a\u3044\u304cWeb\u30da\u30fc\u30b8\u3092\u4fee\u6b63\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u65b9\u306b\u591a\u3044\u60a9\u307f\u3067\u3059\u3002Claude Code\u306f\u3053\u306e\u8ab2\u984c\u3092\u4e00\u6c17\u306b\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. Claude Code\u3078\u306eHTML\/CSS\u751f\u6210\u6307\u793a\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u3078\u306e\u6307\u793a\u4f8b\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3060\u3051\u3067\u3001\u9069\u5207\u306aid\u30fbclass\u304c\u4ed8\u3044\u305fHTML\u3068CSS\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u306a\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30d0\u30fc\u3092\u4f5c\u3063\u3066\u3002\u30ed\u30b4\u304c\u5de6\u3001\u30e1\u30cb\u30e5\u30fc\u304c\u53f3\u3002\u30b9\u30de\u30db\u306f\u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30e1\u30cb\u30e5\u30fc\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u30ab\u30fc\u30c9\u5f62\u5f0f\u306e\u5546\u54c1\u4e00\u89a7\u306eHTML\u3068CSS\u3092\u4f5c\u3063\u3066\u3002\u5404\u30ab\u30fc\u30c9\u306b\u753b\u50cf\u30fb\u30bf\u30a4\u30c8\u30eb\u30fb\u4fa1\u683c\u30fb\u30dc\u30bf\u30f3\u304c\u4e26\u3076\u30ec\u30a4\u30a2\u30a6\u30c8\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u3053\u306eHTML\u306e\u30af\u30e9\u30b9\u540d\u3092BEM\u547d\u540d\u898f\u5247\u306b\u7d71\u4e00\u3057\u3066\u3002\u5909\u66f4\u70b9\u3092\u8aac\u660e\u3057\u306a\u304c\u3089\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300cCSS\u3067`.btn.primary`\u306e\u30b9\u30bf\u30a4\u30eb\u304c`#header .btn`\u306b\u8ca0\u3051\u308b\u7406\u7531\u3092\u6559\u3048\u3066\u3001\u4fee\u6b63\u65b9\u6cd5\u3082\u793a\u3057\u3066\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u3053\u306e\u30b3\u30fc\u30c9\u306b\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5bfe\u5fdc\uff08aria-label\u30fbrole\u5c5e\u6027\uff09\u3092\u8ffd\u52a0\u3057\u3066\u300d<\/span><\/div>\n\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\">\u3084\u308a\u305f\u3044\u3053\u3068\u3092\n\u65e5\u672c\u8a9e\u3067\u8aac\u660e<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">Claude Code\u304c\nHTML\/CSS\u3092\u751f\u6210<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">\u30d6\u30e9\u30a6\u30b6\u3067\u78ba\u8a8d\u30fb\n\u4fee\u6b63\u3092\u4f9d\u983c<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">\u5b8c\u6210\u3057\u305f\u30b3\u30fc\u30c9\u3092\n\u672c\u756a\u306b\u9069\u7528<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981\u306a\u306e\u306f\u3001<strong>\u300c\u4f55\u3092\u5b9f\u73fe\u3057\u305f\u3044\u304b\u300d\u3092\u660e\u78ba\u306b\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308b\u80fd\u529b<\/strong>\u3067\u3059\u3002\u300c\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30e1\u30cb\u30e5\u30fc\u3092\u6a2a\u4e26\u3073\u306b\u3057\u3066\u3001\u30db\u30d0\u30fc\u3059\u308b\u3068\u80cc\u666f\u8272\u304c\u8d64\u304f\u306a\u3063\u3066\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f\u7e26\u4e26\u3073\u306b\u5207\u308a\u66ff\u308f\u308bCSS\u3092\u66f8\u3044\u3066\u300d\u3068\u5177\u4f53\u7684\u306b\u66f8\u3051\u3070\u66f8\u304f\u307b\u3069\u3001\u610f\u56f3\u306b\u5408\u3063\u305f\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6-2. Claude Code\u304c\u751f\u6210\u3057\u305fHTML\/CSS\u306e\u7cbe\u5ea6\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u304c\u751f\u6210\u3059\u308bHTML\u306f\u3001id\u30fbclass\u306e\u4f7f\u3044\u5206\u3051\u304c\u9069\u5207\u3067\u3001BEM\uff08Block Element Modifier\uff09\u306a\u3069\u306e\u547d\u540d\u898f\u5247\u306b\u6cbf\u3063\u305f\u30b3\u30fc\u30c9\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002CSS\u306e\u8a73\u7d30\u5ea6\u306e\u554f\u984c\u3082\u8003\u616e\u3055\u308c\u3066\u304a\u308a\u3001\u300cid\u306f\u69cb\u9020\u7684\u306a\u7528\u9014\u3001class\u306f\u30b9\u30bf\u30a4\u30eb\u9069\u7528\u300d\u3068\u3044\u3046\u73fe\u4ee3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u6cbf\u3063\u305f\u8a2d\u8a08\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u306f\u300c\u3053\u306e\u30b3\u30fc\u30c9\u3067.btn\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3089\u306a\u3044\u7406\u7531\u3092\u6559\u3048\u3066\u300d\u3068\u805e\u3051\u3070\u3001\u8a73\u7d30\u5ea6\u306e\u554f\u984c\u3092\u89e3\u8aac\u3057\u306a\u304c\u3089\u4fee\u6b63\u6848\u3092\u51fa\u3057\u3066\u304f\u308c\u307e\u3059\u3002HTML\/CSS\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u3082Claude Code\u306f\u975e\u5e38\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300cClaude Code\u304c\u66f8\u3044\u305fHTML\u3060\u304b\u3089\u3001id\u3084class\u306e\u77e5\u8b58\u306f\u4e0d\u8981\u300d\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u30fb\u4fee\u6b63\u3059\u308b\u305f\u3081\u306b\u3082\u3001\u4eca\u65e5\u304a\u4f1d\u3048\u3057\u305f\u57fa\u790e\u77e5\u8b58\u306f\u5fc5\u8981\u3067\u3059\u3002\u305f\u3060\u3001\u30bc\u30ed\u304b\u3089\u66f8\u304f\u6642\u9593\u306f\u5927\u5e45\u306b\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-3. BEM\u547d\u540d\u898f\u5247\u3068Claude Code\u306e\u76f8\u6027<\/h3>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>BEM\u547d\u540d\u898f\u5247\uff08Block Element Modifier\uff09<\/strong>\uff1aCSS\u306e\u30af\u30e9\u30b9\u547d\u540d\u898f\u5247\u306e\u4e00\u3064\u3002\u300cBlock\uff08\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\uff09__Element\uff08\u5b50\u8981\u7d20\uff09--Modifier\uff08\u72b6\u614b\uff09\u300d\u3068\u3044\u3046\u69cb\u9020\u3067class\u540d\u3092\u4ed8\u3051\u308b\u30eb\u30fc\u30eb\u3002\u4f8b\uff1a`.card__title` `.btn--primary` `.nav__item--active` \u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u3067\u3001\u30af\u30e9\u30b9\u540d\u3092\u898b\u308b\u3060\u3051\u3067HTML\u306e\u69cb\u9020\u3068\u30b9\u30bf\u30a4\u30eb\u306e\u5f79\u5272\u304c\u5206\u304b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u5927\u898f\u6a21\u30b5\u30a4\u30c8\u3067\u306eCSS\u7ba1\u7406\u306b\u7279\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">BEM\u547d\u540d\u898f\u5247\u306fclass\u540d\u3092\u300c\u8aad\u3093\u3060\u3060\u3051\u3067\u610f\u5473\u304c\u5206\u304b\u308b\u300d\u3088\u3046\u306b\u4ed8\u3051\u308b\u30eb\u30fc\u30eb\u3067\u3001\u30c1\u30fc\u30e0\u958b\u767a\u3084\u5927\u898f\u6a21\u30b5\u30a4\u30c8\u306eCSS\u7ba1\u7406\u306b\u975e\u5e38\u306b\u6709\u52b9\u3067\u3059\u3002Claude Code\u306b\u3053\u306e\u547d\u540d\u898f\u5247\u3092\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u3001BEM\u6e96\u62e0\u306eHTML\u3068CSS\u3092\u81ea\u52d5\u751f\u6210\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u300c\u30cb\u30e5\u30fc\u30b9\u30ab\u30fc\u30c9\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092BEM\u547d\u540d\u898f\u5247\u3067HTML\u3068CSS\u3092\u66f8\u3044\u3066\u3002\u30ab\u30fc\u30c9\u30fb\u30bf\u30a4\u30c8\u30eb\u30fb\u30b5\u30e0\u30cd\u30a4\u30eb\u30fb\u65e5\u4ed8\u30fb\u30ab\u30c6\u30b4\u30ea\u30d0\u30c3\u30b8\u306e\u8981\u7d20\u304c\u3042\u3063\u3066\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u72b6\u614b\u3068\u30cf\u30a4\u30e9\u30a4\u30c8\u72b6\u614b\u3092\u6301\u3064\u300d\u3068\u6307\u793a\u3059\u308b\u3068\u3001`.news-card` `.news-card__title` `.news-card__thumbnail` `.news-card--active` `.news-card--highlighted` \u3068\u3044\u3046\u9069\u5207\u306aBEM\u30af\u30e9\u30b9\u304c\u4ed8\u3044\u305fHTML\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">Claude Code\u3078\u306eBEM\u6307\u793a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c[\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u540d]\u306eHTML\u3068CSS\u3092BEM\u547d\u540d\u898f\u5247\u3067\u66f8\u3044\u3066\u3002\u4ee5\u4e0b\u306e\u8981\u7d20\u3092\u542b\u3081\u308b\uff1a[\u8981\u7d201]\/[\u8981\u7d202]\/[\u8981\u7d203]\u3002\u72b6\u614b\u306f[\u72b6\u614b1]\/[\u72b6\u614b2]\u3002\u80cc\u666f\u306f\u767d\u3001\u30db\u30d0\u30fc\u6642\u306b\u5f71\u304c\u4ed8\u304f\u30c7\u30b6\u30a4\u30f3\u300d\u3068\u3044\u3046\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u6307\u793a\u3059\u308b\u3068\u3001\u4e00\u767a\u3067\u4f7f\u3048\u308b\u30b3\u30fc\u30c9\u304c\u51fa\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">HTML\/CSS\u306e\u547d\u540d\u898f\u5247\u306f\u4f1a\u793e\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3054\u3068\u306b\u9055\u3046\u305f\u3081\u3001\u300c\u3053\u306e\u30b5\u30a4\u30c8\u306fBEM\u3001\u3053\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30d5\u30a1\u30fc\u30b9\u30c8\uff08TailwindCSS\uff09\u300d\u3068\u6307\u5b9a\u3059\u308c\u3070\u305d\u306e\u898f\u5247\u306b\u5408\u3063\u305f\u30b3\u30fc\u30c9\u3092\u51fa\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002Claude Code\u306f\u547d\u540d\u898f\u5247\u3092\u5438\u53ce\u3057\u3066\u4e00\u8cab\u3057\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u70b9\u3067\u3001\u30c1\u30fc\u30e0\u958b\u767a\u3067\u3082\u6d3b\u8e8d\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-4. HTML\/CSS\u81ea\u52d5\u5316\u306e\u59cb\u3081\u65b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u3092\u4f7f\u3063\u305fHTML\/CSS\u81ea\u52d5\u5316\u3092\u59cb\u3081\u308b\u306b\u306f\u3001\u307e\u305aClaude Pro\u30d7\u30e9\u30f3\uff08\u6708\u984d$20\u301c\uff09\u306b\u52a0\u5165\u3057\u3066Claude Code\u3092\u6709\u52b9\u306b\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u8ffd\u52a0\u306e\u8a2d\u5b9a\u3084\u7279\u5225\u306a\u74b0\u5883\u306f\u4e0d\u8981\u3067\u3001\u30d6\u30e9\u30a6\u30b6\u307e\u305f\u306f\u30bf\u30fc\u30df\u30ca\u30eb\u304b\u3089\u3059\u3050\u306b\u4f7f\u3044\u59cb\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\">Claude Pro\u306b\n\u52a0\u5165($20\u301c)<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">Claude Code\u3092\n\u8d77\u52d5<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\nHTML\u3092\u8aad\u307f\u8fbc\u3080<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">\u65e5\u672c\u8a9e\u3067\n\u6307\u793a\u3092\u51fa\u3059<\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\">\u30b3\u30fc\u30c9\u3092\n\u672c\u756a\u306b\u9069\u7528<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e2\u5b58\u30b5\u30a4\u30c8\u306eHTML\u3092\u6539\u4fee\u3059\u308b\u5834\u5408\u306f\u3001\u300c\u3053\u306eHTML\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u3093\u3067\u300d\u3068Claude Code\u306b\u6307\u793a\u3057\u3066\u304b\u3089\u300c\u3053\u3053\u306e\u90e8\u5206\u306eclass\u3092BEM\u306b\u5909\u63db\u3057\u3066\u300d\u300c\u3053\u306eID\u306e\u30b9\u30bf\u30a4\u30eb\u3092class\u306b\u79fb\u884c\u3057\u3066\u8a73\u7d30\u5ea6\u3092\u4e0b\u3052\u3066\u300d\u3068\u7d99\u7d9a\u7684\u306b\u6307\u793a\u3067\u304d\u307e\u3059\u3002Claude Code\u306f\u6587\u8108\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u305f\u3081\u3001\u65e2\u5b58\u306e\u69cb\u9020\u3092\u58ca\u3059\u30ea\u30b9\u30af\u304c\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-html-id-class&#038;blog_slug=cc-html-id-class\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-html-id-class&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-07\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">07<\/span>\n  <span class=\"section-label\" style=\"display:block;\">GENAI HTML AUTO<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u30c7\u30fc\u30bf\u3011GENAI\u306eHTML\/CSS\u81ea\u52d5\u5316\u4e8b\u4f8b<\/span>\n  <span class=\"section-desc\">\u5b9f\u969b\u306bClaude Code\u3067\u3069\u308c\u3060\u3051HTML\u4f5c\u696d\u304c\u52b9\u7387\u5316\u3055\u308c\u305f\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u3067\u306f\u3001\u30d6\u30ed\u30b0\u8a18\u4e8b\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30fbLP\uff08\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30da\u30fc\u30b8\uff09\u30fb\u793e\u5185\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u306eHTML\/CSS\u4f5c\u696d\u306bClaude Code\u3092\u6d3b\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u4f5c\u696d\u5185\u5bb9<\/th><th>Claude Code\u4ee5\u524d<\/th><th>Claude Code\u5c0e\u5165\u5f8c<\/th><th>\u524a\u6e1b\u7387<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u65b0\u898fLP\u306eHTML\u9aa8\u683c\u4f5c\u6210<\/td><td>4\u301c6\u6642\u9593<\/td><td>30\u301c60\u5206<\/td><td>\u7d0490%\u524a\u6e1b<\/td><\/tr>\n<tr><td>CSS\u30c7\u30d0\u30c3\u30b0\uff08\u30b9\u30bf\u30a4\u30eb\u7af6\u5408\uff09<\/td><td>30\u5206\u301c2\u6642\u9593<\/td><td>5\u301c15\u5206<\/td><td>\u7d0485%\u524a\u6e1b<\/td><\/tr>\n<tr><td>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\uff08\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\uff09<\/td><td>1\u301c3\u6642\u9593<\/td><td>20\u301c30\u5206<\/td><td>\u7d0485%\u524a\u6e1b<\/td><\/tr>\n<tr><td>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5bfe\u5fdc<\/td><td>2\u301c4\u6642\u9593\uff08\u5c02\u9580\u77e5\u8b58\u8981\uff09<\/td><td>30\u5206<\/td><td>\u7d0488%\u524a\u6e1b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u52b9\u679c\u304c\u5927\u304d\u304b\u3063\u305f\u306e\u306f<strong>CSS\u30c7\u30d0\u30c3\u30b0\u306e\u6642\u9593\u77ed\u7e2e<\/strong>\u3067\u3059\u3002\u300c\u3053\u306e\u30b9\u30bf\u30a4\u30eb\u304c\u5f53\u305f\u3089\u306a\u3044\u7406\u7531\u3092\u6559\u3048\u3066\u3001CSS\u30bb\u30ec\u30af\u30bf\u306e\u30b3\u30fc\u30c9\u3092\u898b\u305b\u308b\u300d\u3068\u6307\u793a\u3059\u308b\u3060\u3051\u3067\u3001\u8a73\u7d30\u5ea6\u306e\u554f\u984c\u30fb\u30bb\u30ec\u30af\u30bf\u306e\u30df\u30b9\u30fbHTML\u306e\u69cb\u9020\u7684\u306a\u554f\u984c\u3092\u5373\u5ea7\u306b\u6307\u6458\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002\u4ee5\u524d\u306f1\u301c2\u6642\u9593\u304b\u304b\u3063\u3066\u3044\u305f\u30c7\u30d0\u30c3\u30b0\u304c\u3001\u5e73\u574715\u5206\u4ee5\u5185\u3067\u5b8c\u4e86\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">id\u3068class\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051\u304c\u81ea\u52d5\u5316\u4f5c\u696d\u306b\u3082\u597d\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u307e\u3059\u3002\u4ee5\u524d\u306f\u3001Web\u30da\u30fc\u30b8\u3092\u66f4\u65b0\u3059\u308b\u305f\u3073\u306b\u300c\u3069\u306eclass\u3092\u5909\u66f4\u3059\u308c\u3070\u76ee\u7684\u306e\u8981\u7d20\u306b\u5f71\u97ff\u3059\u308b\u304b\u300d\u3092\u8abf\u3079\u308b\u6642\u9593\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001Claude Code\u306b\u30da\u30fc\u30b8\u5168\u4f53\u306eHTML\u3092\u8aad\u307e\u305b\u3066\u300c\u3053\u306e\u30dc\u30bf\u30f3\u306e\u30b9\u30bf\u30a4\u30eb\u3060\u3051\u5909\u3048\u3066\u300d\u3068\u6307\u793a\u3059\u308c\u3070\u3001\u5bfe\u8c61\u306eclass\u3092\u81ea\u52d5\u3067\u7279\u5b9a\u3057\u3066\u5909\u66f4\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:20px;\">&#9888;&#65039;<\/span><strong style=\"color:#dc2626;font-size:16px;\">\u300cHTML\u3092Claude Code\u306b\u6e21\u3057\u305f\u3089\u6307\u793a\u5185\u5bb9\u304c\u591a\u3059\u304e\u305f\u300d\u3068\u3044\u3046\u5931\u6557\u4f8b<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u9577\u5927\u306aHTML\u3092\u305d\u306e\u307e\u307eClaude Code\u306b\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u3001\u5909\u66f4\u3057\u305f\u304f\u306a\u3044\u7b87\u6240\u307e\u3067\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5bfe\u7b56\u3068\u3057\u3066\u300c\u3053\u306e div#header \u306e\u4e2d\u3060\u3051\u4fee\u6b63\u3057\u3066\u3001\u4ed6\u306f\u89e6\u3089\u306a\u3044\u3067\u300d\u306e\u3088\u3046\u306b\u64cd\u4f5c\u30b9\u30b3\u30fc\u30d7\u3092\u660e\u78ba\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. \u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u304cWeb\u6539\u4fee\u3092\u81ea\u8d70\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u4e8b\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">GENAI\u306e\u55b6\u696d\u30c1\u30fc\u30e0\u3067\u306f\u3001LP\uff08\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30da\u30fc\u30b8\uff09\u306e\u6587\u8a00\u5909\u66f4\u3084CTA\uff08\u30b3\u30fc\u30eb\u30fb\u30c8\u30a5\u30fb\u30a2\u30af\u30b7\u30e7\u30f3\uff09\u30dc\u30bf\u30f3\u306e\u8abf\u6574\u3092\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u901a\u3055\u305a\u76f4\u63a5Claude Code\u3067\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u4ee5\u524d\u306fHTML\u306e\u77e5\u8b58\u304c\u306a\u3044\u305f\u3081\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u4f9d\u983c\u3057\u3066\u3044\u305f\u304c\u3001Claude Code\u306b\u300c\u3053\u306eid=main-cta\u306e\u30dc\u30bf\u30f3\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u3007\u3007\u306b\u5909\u3048\u3066\u3001\u8272\u3092\u8d64\u304b\u3089\u9752\u306b\u5909\u3048\u3066\u300d\u3068\u6307\u793a\u3059\u308b\u3060\u3051\u3067\u4fee\u6b63\u304c\u5b8c\u4e86\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981\u306a\u306e\u306f\u3001id\u3084class\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3092\u77e5\u3063\u3066\u3044\u308b\u304b\u3089\u3053\u305d\u3001Claude Code\u3078\u306e\u6307\u793a\u304c\u5177\u4f53\u7684\u306b\u306a\u308b\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u300c\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306e\u3069\u306e\u90e8\u5206\u3092\u4fee\u6b63\u3057\u305f\u3044\u304b\u300d\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u300c`#global-nav` \u306e\u30b9\u30bf\u30a4\u30eb\u3092\u5909\u66f4\u3057\u3066\u300d\u3068\u3044\u3046\u6307\u793a\u304c\u51fa\u305b\u308b\u3002\u3053\u306e\u77e5\u8b58\u3068\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306eWeb\u6539\u4fee\u4f5c\u696d\u3092\u5927\u5e45\u306b\u52b9\u7387\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Web\u5236\u4f5c\u306e\u751f\u7523\u6027\u3092\u4e0a\u3052\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u308b\u7d4c\u55b6\u8005\u30fb\u30de\u30fc\u30b1\u30bf\u30fc\u306e\u65b9\u306b\u7279\u306b\u52e7\u3081\u305f\u3044\u306e\u304c\u3001Claude Code\u3078\u306eHTML\/CSS\u751f\u6210\u306e\u4f9d\u983c\u3067\u3059\u3002\u6280\u8853\u7684\u306a\u7d30\u304b\u3044\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082\u300c\u3053\u3093\u306a\u30c7\u30b6\u30a4\u30f3\u306b\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u30d3\u30b8\u30e7\u30f3\u3092\u8a00\u8a9e\u5316\u3067\u304d\u308c\u3070\u3001\u5b9f\u88c5\u307e\u3067\u6301\u3063\u3066\u3044\u3051\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300cid\u3068class\u304c\u5206\u304b\u308c\u3070HTML\u4fee\u6b63\u306e9\u5272\u306f\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u306e\u304c\u79c1\u306e\u5b9f\u611f\u3067\u3059\u3002\u6b8b\u308a1\u5272\u306eJavaScript\u30fb\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u8907\u96d1\u306a\u554f\u984c\u306fClaude Code\u306b\u983c\u308a\u3064\u3064\u3001\u57fa\u790e\u306e\u6982\u5ff5\u3060\u3051\u3057\u3063\u304b\u308a\u6301\u3063\u3066\u304a\u304f\u3002\u3053\u306e\u30b9\u30bf\u30f3\u30b9\u3067Web\u5236\u4f5c\u306e\u30cf\u30fc\u30c9\u30eb\u304c\u304b\u306a\u308a\u4e0b\u304c\u308a\u307e\u3057\u305f\u3002<\/div>\n<\/div>\n\n\n\n<p>\u300cHTML\u3084CSS\u306e\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082Web\u30da\u30fc\u30b8\u3092\u4f5c\u308a\u305f\u3044\u300d\u300cClaude Code\u3067Web\u5236\u4f5c\u3092\u52b9\u7387\u5316\u3057\u305f\u3044\u304c\u3001\u3069\u3046\u59cb\u3081\u308c\u3070\u3044\u3044\u304b\u300d\u2014\u2014\u305d\u3046\u3057\u305f\u7591\u554f\u3092\u304a\u6301\u3061\u306e\u65b9\u306f\u3001\u307e\u305a\u306f\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\u3002\u5f0a\u793eGENAI\u3067\u306f\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7d4c\u55b6\u8005\u30fb\u7ba1\u7406\u8077\u306e\u65b9\u304cWeb\u5236\u4f5c\u3067Claude Code\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);border-radius:16px;padding:36px 32px;margin:48px 0 16px;color:#fff;\">\n  <p style=\"font-size:13px;font-weight:700;color:#dc2626;letter-spacing:2px;margin:0 0 12px;\">NEXT STEP<\/p>\n  <p style=\"font-size:22px;font-weight:800;line-height:1.5;margin:0 0 20px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9\u3092\u3001\u3042\u306a\u305f\u306e\u30d3\u30b8\u30cd\u30b9\u3067<br>\u5b9f\u8df5\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f<\/p>\n  <div style=\"background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:12px;padding:24px;max-width:560px;margin:0 auto;\">\n    <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">AI\u6d3b\u7528\u3092\u81ea\u793e\u3067\u56de\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u65b9\u3078<\/p>\n    <p style=\"font-size:20px;font-weight:800;margin:0 0 12px;\">AI\u9b3c\u7ba1\u7406<\/p>\n    <p style=\"font-size:14px;color:rgba(255,255,255,0.75);margin:0 0 20px;line-height:1.7;\">Claude Code\u30fbCowork\u5c0e\u5165\u652f\u63f4\u304b\u3089\u696d\u52d9\u8a2d\u8a08\u30fb\u793e\u5185\u6d78\u900f\u307e\u3067\u5b9f\u8df5\u30d9\u30fc\u30b9\u3067\u4f34\u8d70\u3002\u300c\u81ea\u793e\u3067\u56de\u305b\u308b\u7d44\u7e54\u300d\u309290\u65e5\u3067\u4f5c\u308b\u7d4c\u55b6\u8005\u5411\u3051\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3002<\/p>\n    <div style=\"text-align:center;\">\n      <a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&utm_medium=article&utm_campaign=cc-html-id-class&utm_content=next-step-cta\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#dc2626;color:#fff;font-weight:700;font-size:15px;padding:14px 32px;border-radius:30px;text-decoration:none;\">AI\u9b3c\u7ba1\u7406\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q. id\u3068class\u306f\u3069\u3061\u3089\u3092\u591a\u304f\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u4e00\u822c\u7684\u306b\u306fclass\u3092\u591a\u304f\u4f7f\u3046\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002class\u306f\u30b9\u30bf\u30a4\u30eb\u306e\u518d\u5229\u7528\u6027\u304c\u9ad8\u304f\u3001\u8907\u6570\u306e\u8981\u7d20\u306b\u540c\u3058\u30c7\u30b6\u30a4\u30f3\u3092\u9069\u7528\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u306e\u7ba1\u7406\u304c\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002id\u306f\u300c\u30da\u30fc\u30b8\u5185\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u76ee\u7684\u5730\u300d\u3084\u300cJavaScript\u3067\u7279\u5b9a\u306e1\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408\u300d\u306b\u9650\u5b9a\u3057\u3066\u4f7f\u3046\u306e\u304c\u73fe\u4ee3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002\u300c\u69cb\u9020\u306b\u306fid\u3001\u30b9\u30bf\u30a4\u30eb\u306b\u306fclass\u300d\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u304c\u6574\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. id\u304c\u91cd\u8907\u3059\u308b\u3068\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. HTML\u4ed5\u69d8\u4e0a\u306f\u7121\u52b9\u3067\u3059\u304c\u3001\u591a\u304f\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u30a8\u30e9\u30fc\u3092\u51fa\u3055\u305a\u306b\u8868\u793a\u3092\u7d9a\u3051\u307e\u3059\u3002\u305f\u3060\u3057\u3001JavaScript\u306e`getElementById`\u306f\u6700\u521d\u306e1\u8981\u7d20\u3057\u304b\u53d6\u5f97\u3057\u306a\u3044\u305f\u3081\u30012\u3064\u76ee\u4ee5\u964d\u306eid\u306f\u7121\u8996\u3055\u308c\u307e\u3059\u3002CSS\u306f\u5168\u3066\u306e\u91cd\u8907id\u306b\u5bfe\u3057\u3066\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3057\u307e\u3059\u304c\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u30c4\u30fc\u30eb\u3084\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u306e\u30af\u30ed\u30fc\u30e9\u30fc\u304cHTML\u3092\u89e3\u6790\u3059\u308b\u969b\u306b\u554f\u984c\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002HTML\u691c\u8a3c\u30c4\u30fc\u30eb\uff08W3C Validator\u306a\u3069\uff09\u3092\u4f7f\u3063\u3066\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. 1\u3064\u306e\u8981\u7d20\u306bid\u3068class\u3092\u540c\u6642\u306b\u4ed8\u3051\u3089\u308c\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u306f\u3044\u3001\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070 `&lt;header id=\"main-header\" class=\"sticky-nav dark-theme\"&gt;` \u306e\u3088\u3046\u306b\u66f8\u304f\u3068\u3001id\u3067\u300c\u3053\u306e\u30d8\u30c3\u30c0\u30fc\u306f\u552f\u4e00\u306e\u5b58\u5728\u300d\u3068\u3057\u3066\u8b58\u5225\u3057\u3064\u3064\u3001class\u3067\u300csticky-nav\u300d\u300cdark-theme\u300d\u3068\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u30b0\u30eb\u30fc\u30d7\u306b\u5c5e\u3059\u308b\u3068\u3044\u3046\u60c5\u5831\u3092\u540c\u6642\u306b\u6301\u3066\u307e\u3059\u3002JavaScript\u3067\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306fid\u3001\u30b9\u30bf\u30a4\u30eb\u3092\u67d4\u8edf\u306b\u5909\u3048\u305f\u3044\u5834\u5408\u306fclass\u3092\u4f7f\u3046\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u3067\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Claude Code\u306fHTML\u3068CSS\u306e\u77e5\u8b58\u304c\u306a\u3044\u3068\u3046\u307e\u304f\u4f7f\u3048\u307e\u305b\u3093\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u5b8c\u5168\u306b\u30bc\u30ed\u3067\u3082\u4f7f\u3048\u307e\u3059\u304c\u3001\u3042\u308b\u7a0b\u5ea6\u306e\u57fa\u790e\u77e5\u8b58\u304c\u3042\u308b\u3068\u6307\u793a\u306e\u7cbe\u5ea6\u3068\u4fee\u6b63\u52b9\u7387\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u300cid\u5c5e\u6027\u3067\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u3066\u3001JavaScript\u304b\u3089getElementById\u3067\u64cd\u4f5c\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u300d\u3068\u3044\u3046\u5177\u4f53\u7684\u306a\u6307\u793a\u304c\u3067\u304d\u308b\u3068\u3001\u610f\u56f3\u901a\u308a\u306e\u30b3\u30fc\u30c9\u304c\u4e00\u767a\u3067\u51fa\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u4eca\u56de\u89e3\u8aac\u3057\u305fid\u30fbclass\u30fbCSS\u306e\u512a\u5148\u9806\u4f4d\u7a0b\u5ea6\u306e\u77e5\u8b58\u304c\u3042\u308c\u3070\u3001Claude Code\u3068\u306e\u5bfe\u8a71\u3067\u307b\u3068\u3093\u3069\u306eWeb\u5236\u4f5c\u4f5c\u696d\u3092\u3053\u306a\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. CSS\u3067id\u30bb\u30ec\u30af\u30bf\u3092\u4f7f\u308f\u306a\u3044\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. CSS\u3067id\u30bb\u30ec\u30af\u30bf\uff08#\u540d\u524d\uff09\u3092\u4f7f\u3046\u3068\u3001\u8a73\u7d30\u5ea6\u304c100\u30dd\u30a4\u30f3\u30c8\u3068\u975e\u5e38\u306b\u9ad8\u304f\u306a\u308b\u305f\u3081\u3001\u5f8c\u304b\u3089\u30b9\u30bf\u30a4\u30eb\u3092\u4e0a\u66f8\u304d\u3059\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070`#header { color: red; }`\u3092\u5f8c\u304b\u3089`.header-title { color: blue; }`\u3067\u4e0a\u66f8\u304d\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u3001id\u306e\u8a73\u7d30\u5ea6\u304c\u9ad8\u3059\u304e\u3066\u52b9\u304b\u306a\u3044\u3001\u3068\u3044\u3046\u554f\u984c\u304c\u8d77\u304d\u307e\u3059\u3002\u3053\u308c\u304cCSS\u3067\u306fclass\uff08\u8a73\u7d30\u5ea610pt\uff09\u3092\u4e3b\u529b\u306b\u3057\u3066\u3001id\u306f\u3067\u304d\u308b\u3060\u3051\u4f7f\u308f\u306a\u3044\u8a2d\u8a08\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u7406\u7531\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. SEO\u306b\u304a\u3044\u3066id\u3068class\u306f\u3069\u3061\u3089\u304c\u91cd\u8981\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. SEO\u306e\u89b3\u70b9\u3067\u306f\u3001id\u3068class\u306e\u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u3088\u308a\u3082\u3001\u30bb\u30de\u30f3\u30c6\u30a3\u30c3\u30af\u306aHTML\u30bf\u30b0\uff08header\u30fbmain\u30fbarticle\u30fbsection\u7b49\uff09\u306e\u4f7f\u3044\u65b9\u304c\u3088\u308a\u91cd\u8981\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u69cb\u9020\u5316\u30c7\u30fc\u30bf\uff08schema.org\uff09\u3084\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\uff08WAI-ARIA\uff09\u306e\u5b9f\u88c5\u3067id\u304c\u4f7f\u308f\u308c\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u3001\u3053\u308c\u304cSEO\u30fb\u30af\u30ed\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306b\u9593\u63a5\u7684\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002Claude Code\u3067\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b\u969b\u306b\u300cSEO\u306b\u914d\u616e\u3057\u305f\u30bb\u30de\u30f3\u30c6\u30a3\u30c3\u30afHTML\u306b\u3057\u3066\u300d\u3068\u6307\u793a\u3059\u308b\u3068\u3001\u9069\u5207\u306a\u8981\u7d20\u3068id\u30fbclass\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u51fa\u529b\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"id\u3068class\u306f\u3069\u3061\u3089\u3092\u591a\u304f\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u4e00\u822c\u7684\u306b\u306fclass\u3092\u591a\u304f\u4f7f\u3046\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002class\u306f\u30b9\u30bf\u30a4\u30eb\u306e\u518d\u5229\u7528\u6027\u304c\u9ad8\u304f\u3001\u8907\u6570\u306e\u8981\u7d20\u306b\u540c\u3058\u30c7\u30b6\u30a4\u30f3\u3092\u9069\u7528\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u306e\u7ba1\u7406\u304c\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002id\u306f\u300c\u30da\u30fc\u30b8\u5185\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u76ee\u7684\u5730\u300d\u3084\u300cJavaScript\u3067\u7279\u5b9a\u306e1\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408\u300d\u306b\u9650\u5b9a\u3057\u3066\u4f7f\u3046\u306e\u304c\u73fe\u4ee3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002\u300c\u69cb\u9020\u306b\u306fid\u3001\u30b9\u30bf\u30a4\u30eb\u306b\u306fclass\u300d\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u304c\u6574\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"id\u304c\u91cd\u8907\u3059\u308b\u3068\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"HTML\u4ed5\u69d8\u4e0a\u306f\u7121\u52b9\u3067\u3059\u304c\u3001\u591a\u304f\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u30a8\u30e9\u30fc\u3092\u51fa\u3055\u305a\u306b\u8868\u793a\u3092\u7d9a\u3051\u307e\u3059\u3002\u305f\u3060\u3057\u3001JavaScript\u306e`getElementById`\u306f\u6700\u521d\u306e1\u8981\u7d20\u3057\u304b\u53d6\u5f97\u3057\u306a\u3044\u305f\u3081\u30012\u3064\u76ee\u4ee5\u964d\u306eid\u306f\u7121\u8996\u3055\u308c\u307e\u3059\u3002CSS\u306f\u5168\u3066\u306e\u91cd\u8907id\u306b\u5bfe\u3057\u3066\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3057\u307e\u3059\u304c\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u30c4\u30fc\u30eb\u3084\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u306e\u30af\u30ed\u30fc\u30e9\u30fc\u304cHTML\u3092\u89e3\u6790\u3059\u308b\u969b\u306b\u554f\u984c\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002HTML\u691c\u8a3c\u30c4\u30fc\u30eb\uff08W3C Validator\u306a\u3069\uff09\u3092\u4f7f\u3063\u3066\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"1\u3064\u306e\u8981\u7d20\u306bid\u3068class\u3092\u540c\u6642\u306b\u4ed8\u3051\u3089\u308c\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u306f\u3044\u3001\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070 `&lt;header id=\\\"main-header\\\" class=\\\"sticky-nav dark-theme\\\"&gt;` \u306e\u3088\u3046\u306b\u66f8\u304f\u3068\u3001id\u3067\u300c\u3053\u306e\u30d8\u30c3\u30c0\u30fc\u306f\u552f\u4e00\u306e\u5b58\u5728\u300d\u3068\u3057\u3066\u8b58\u5225\u3057\u3064\u3064\u3001class\u3067\u300csticky-nav\u300d\u300cdark-theme\u300d\u3068\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u30b0\u30eb\u30fc\u30d7\u306b\u5c5e\u3059\u308b\u3068\u3044\u3046\u60c5\u5831\u3092\u540c\u6642\u306b\u6301\u3066\u307e\u3059\u3002JavaScript\u3067\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306fid\u3001\u30b9\u30bf\u30a4\u30eb\u3092\u67d4\u8edf\u306b\u5909\u3048\u305f\u3044\u5834\u5408\u306fclass\u3092\u4f7f\u3046\u3068\u3044\u3046\u5f79\u5272\u5206\u62c5\u3067\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Claude Code\u306fHTML\u3068CSS\u306e\u77e5\u8b58\u304c\u306a\u3044\u3068\u3046\u307e\u304f\u4f7f\u3048\u307e\u305b\u3093\u304b\uff1f\",\n    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Code\u3068\u306e\u5bfe\u8a71\u3067\u307b\u3068\u3093\u3069\u306eWeb\u5236\u4f5c\u4f5c\u696d\u3092\u3053\u306a\u305b\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"CSS\u3067id\u30bb\u30ec\u30af\u30bf\u3092\u4f7f\u308f\u306a\u3044\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"CSS\u3067id\u30bb\u30ec\u30af\u30bf\uff08#\u540d\u524d\uff09\u3092\u4f7f\u3046\u3068\u3001\u8a73\u7d30\u5ea6\u304c100\u30dd\u30a4\u30f3\u30c8\u3068\u975e\u5e38\u306b\u9ad8\u304f\u306a\u308b\u305f\u3081\u3001\u5f8c\u304b\u3089\u30b9\u30bf\u30a4\u30eb\u3092\u4e0a\u66f8\u304d\u3059\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070`#header { color: red; }`\u3092\u5f8c\u304b\u3089`.header-title { color: blue; 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