{"id":17829,"date":"2026-07-18T06:58:17","date_gmt":"2026-07-17T21:58:17","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=17829"},"modified":"2026-07-18T06:58:17","modified_gmt":"2026-07-17T21:58:17","slug":"cc-html-font-tag","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-html-font-tag\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011HTML\u306efont\u30bf\u30b0\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u6587\u5b57\u306e\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u6307\u5b9a\u3068CSS\u4ee3\u66ff\u30fbClaude Code\u6d3b\u7528\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-font-tag.jpg\" alt=\"\u30102026\u5e747\u6708\u6700\u65b0\u3011HTML\u306efont\u30bf\u30b0\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u6587\u5b57\u306e\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u6307\u5b9a\u3068CSS\u4ee3\u66ff\u30fbClaude Code\u6d3b\u7528\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:0;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\u306efont\u30bf\u30b0\u3068\u306f\uff1f\u57fa\u672c\u3068\u975e\u63a8\u5968\u306b\u306a\u3063\u305f\u7406\u7531<\/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>font color\u3067\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/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>\u8272\u306e\u6307\u5b9a\u65b9\u6cd5\uff1a\u30ab\u30e9\u30fc\u540d\u30fbHEX\u30fbRGB\u30fbHSL<\/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>font size\u3067\u6587\u5b57\u306e\u30b5\u30a4\u30ba\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/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>font face\u3067\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/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>font\u30bf\u30b0\u306e\u6ce8\u610f\u70b9\uff1a\u975e\u63a8\u5968\u3067CSS\u306b\u79fb\u884c\u3059\u3079\u304d\u7406\u7531<\/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>CSS\u306ecolor\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u6587\u5b57\u8272\u3092\u5909\u3048\u308b\uff08\u73fe\u4ee3\u306e\u65b9\u6cd5\uff09<\/a><\/li>\n    <li><a href=\"#sec-08\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">08<\/span>CSS\u306efont-size\/font-family\u3067\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u3092\u5909\u3048\u308b<\/a><\/li>\n    <li><a href=\"#sec-09\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">09<\/span>font\u30bf\u30b0\u304b\u3089CSS\u3078\u306e\u66f8\u304d\u63db\u3048\u65b9\uff1a\u79fb\u884c\u30d1\u30bf\u30fc\u30f3\u96c6<\/a><\/li>\n    <li><a href=\"#sec-10\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">10<\/span>Claude Code\u3067HTML\u306e\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u3092\u52b9\u7387\u5316\u3059\u308b<\/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\">HTML\u3092\u52c9\u5f37\u3057\u59cb\u3081\u308b\u3068\u300c\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\u306b\u306ffont\u30bf\u30b0\u3092\u4f7f\u3046\u300d\u3068\u3044\u3046\u60c5\u5831\u3092\u898b\u304b\u3051\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u73fe\u4ee3\u306eHTML5\u3067\u306f<strong>font\u30bf\u30b0\u306f\u975e\u63a8\u5968\uff08deprecated\uff09<\/strong>\u3068\u3055\u308c\u3066\u304a\u308a\u3001\u4ee3\u308f\u308a\u306bCSS\u3092\u4f7f\u3046\u306e\u304c\u6b63\u3057\u3044\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3068\u306f\u3044\u3048\u300cfont\u30bf\u30b0\u3068\u306f\u4f55\u304b\u300d\u300c\u306a\u305c\u975e\u63a8\u5968\u306b\u306a\u3063\u305f\u306e\u304b\u300d\u300c\u3069\u3046CSS\u306b\u66f8\u304d\u63db\u3048\u308c\u3070\u3044\u3044\u304b\u300d\u3092\u4f53\u7cfb\u7684\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001HTML\u306e\u672c\u8cea\u3092\u5b66\u3076\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002\u53e4\u3044Web\u30b5\u30a4\u30c8\u306e\u30b3\u30fc\u30c9\u3092\u4fee\u6b63\u3059\u308b\u5834\u9762\u3067\u3082\u3001font\u30bf\u30b0\u306e\u77e5\u8b58\u306f\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f<strong>HTML\u306efont\u30bf\u30b0\u306b\u95a2\u3059\u308b\u5168\u77e5\u8b58\u3068\u3001\u73fe\u4ee3\u306e\u6b63\u3057\u3044CSS\u8a18\u6cd5\u3078\u306e\u79fb\u884c\u65b9\u6cd5\u3092\u5b8c\u5168\u89e3\u8aac<\/strong>\u3057\u307e\u3059\u3002\u3055\u3089\u306b<strong>Claude Code\u3067HTML\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5<\/strong>\u3082\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\">\u53e4\u3044Web\u30b5\u30a4\u30c8\u306e\u6539\u4fee\u6848\u4ef6\u3067\u306f\u4eca\u3067\u3082font\u30bf\u30b0\u304c\u5927\u91cf\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u300cfont\u30bf\u30b0\u3092CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046\u4f9d\u983c\u3082\u3088\u304f\u3042\u308a\u307e\u3059\u3002Claude Code\u306b\u5bfe\u3057\u3066font\u30bf\u30b0\u304c\u542b\u307e\u308c\u308bHTML\u5168\u4f53\u3092\u6e21\u3057\u3066\u300cCSS\u306b\u66f8\u304d\u63db\u3048\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3068\u3001\u5168\u3066\u81ea\u52d5\u3067CSS\u306b\u5909\u63db\u3057\u3066\u304f\u308c\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>HTML\u306e<strong>font\u30bf\u30b0\u306e\u57fa\u672c\u69cb\u6587<\/strong>\uff08color\u30fbsize\u30fbface\u5c5e\u6027\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>font color\u3067\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b<\/strong>\u65b9\u6cd5\u3068\u30ab\u30e9\u30fc\u540d\u306e\u4e00\u89a7<\/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>\u8272\u306e\u6307\u5b9a\u65b9\u6cd5<\/strong>\uff1a\u30ab\u30e9\u30fc\u540d\u30fbHEX\uff08#RRGGBB\uff09\u30fbRGB\u30fbHSL<\/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>font\u30bf\u30b0\u304c\u975e\u63a8\u5968\u306b\u306a\u3063\u305f\u7406\u7531<\/strong>\u3068HTML5\u3067\u306e\u6271\u3044<\/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\u306ecolor\u30d7\u30ed\u30d1\u30c6\u30a3\u30fbfont-size\u30fbfont-family<\/strong>\u3078\u306e\u66f8\u304d\u63db\u3048\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>font\u30bf\u30b0\u304b\u3089CSS\u3078\u306e\u79fb\u884c\u30d1\u30bf\u30fc\u30f3<\/strong>\uff08\u30af\u30e9\u30b9\u8a2d\u8a08\u30fb\u30a4\u30f3\u30e9\u30a4\u30f3CSS\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>Claude Code\u3067HTML\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0<\/strong>\u3092\u81ea\u52d5\u5316\u30fb\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5<\/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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">FONT TAG BASICS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">HTML\u306efont\u30bf\u30b0\u3068\u306f\uff1f\u57fa\u672c\u3068\u975e\u63a8\u5968\u306b\u306a\u3063\u305f\u7406\u7531<\/span>\n  <span class=\"section-desc\">HTML4\u6642\u4ee3\u306e\u6587\u5b57\u88c5\u98fe\u30bf\u30b0\u3068HTML5\u3067\u306e\u6271\u3044<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTML\u306e<strong>font\u30bf\u30b0\u306f\u3001\u30c6\u30ad\u30b9\u30c8\u306e\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u53e4\u3044HTML\u8981\u7d20<\/strong>\u3067\u3059\u3002HTML 4.01\u307e\u3067\u306f\u6a19\u6e96\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001HTML5\u3067\u306f\u300c\u5ec3\u6b62\u3055\u308c\u305f\u8981\u7d20\uff08obsolete element\uff09\u300d\u3068\u306a\u308a\u3001\u73fe\u4ee3\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u307e\u3060\u8868\u793a\u306f\u3059\u308b\u3082\u306e\u306e\u4f7f\u7528\u306f\u975e\u63a8\u5968\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/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>\u975e\u63a8\u5968\uff08deprecated\uff09\u3068\u5ec3\u6b62\uff08obsolete\uff09\u306e\u9055\u3044<\/strong>\uff1aHTML\u306e\u6587\u8108\u3067\u300c\u975e\u63a8\u5968\uff08deprecated\uff09\u300d\u306fHTML 4.01\u6642\u4ee3\u306e\u8868\u73fe\u3067\u300c\u5c06\u6765\u7684\u306b\u4f7f\u3048\u306a\u304f\u306a\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u305f\u3081\u4ee3\u66ff\u65b9\u6cd5\u3092\u4f7f\u3046\u3053\u3068\u3092\u63a8\u5968\u300d\u3068\u3044\u3046\u610f\u5473\u3060\u3063\u305f\u3002HTML5\u3067\u306f\u300c\u5ec3\u6b62\uff08obsolete\uff09\u300d\u3068\u3044\u3046\u6982\u5ff5\u306b\u5909\u308f\u308a\u3001font\u30bf\u30b0\u306fobsolete\u306b\u5206\u985e\u3055\u308c\u3066\u3044\u308b\u3002\u30d6\u30e9\u30a6\u30b6\u306f\u5f8c\u65b9\u4e92\u63db\u6027\u306e\u305f\u3081\u8868\u793a\u306f\u3059\u308b\u304c\u3001\u4ed5\u69d8\u66f8\u3067\u306f\u4f7f\u7528\u3092\u7981\u6b62\u3057\u3066\u304a\u308a\u3001\u65b0\u898f\u30b3\u30fc\u30c9\u306b\u306f\u7d76\u5bfe\u306b\u4f7f\u3046\u3079\u304d\u3067\u306f\u306a\u3044\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- font\u30bf\u30b0\u306e\u57fa\u672c\u69cb\u6587 --&gt;\n&lt;font color=\"red\" size=\"4\" face=\"Arial\"&gt;\u3053\u306e\u6587\u5b57\u306f\u8d64\u8272\u30fb\u30b5\u30a4\u30ba4\u30fbArial&lt;\/font&gt;\n\n&lt;!-- \u5c5e\u6027\u306f3\u7a2e\u985e --&gt;\n&lt;font color=\"\u8272\"&gt;\u6587\u5b57\u306e\u8272&lt;\/font&gt;\n&lt;font size=\"\u6570\u5024\"&gt;\u6587\u5b57\u306e\u30b5\u30a4\u30ba\uff081\u301c7\uff09&lt;\/font&gt;\n&lt;font face=\"\u30d5\u30a9\u30f3\u30c8\u540d\"&gt;\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e&lt;\/font&gt;\n\n&lt;!-- \u8907\u6570\u306e\u5c5e\u6027\u3092\u7d44\u307f\u5408\u308f\u305b\u3082\u53ef\u80fd --&gt;\n&lt;font color=\"#0066cc\" size=\"5\" face=\"Verdana\"&gt;\u7d44\u307f\u5408\u308f\u305b\u4f8b&lt;\/font&gt;<\/pre>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>font\u30bf\u30b0\u306e\u5c5e\u6027<\/th><th>\u5f79\u5272<\/th><th>\u5024\u306e\u4f8b<\/th><th>\u73fe\u4ee3\u306eCSS\u4ee3\u66ff<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>color<\/td><td>\u6587\u5b57\u306e\u8272\u3092\u6307\u5b9a<\/td><td>\"red\"\u3001\"#FF0000\"\u3001\"rgb(255,0,0)\"<\/td><td>color \u30d7\u30ed\u30d1\u30c6\u30a3<\/td><\/tr>\n<tr><td>size<\/td><td>\u6587\u5b57\u306e\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\uff081\u301c7\uff09<\/td><td>\"3\"\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u3001\"5\"\uff08\u5927\u304d\u3044\uff09<\/td><td>font-size \u30d7\u30ed\u30d1\u30c6\u30a3<\/td><\/tr>\n<tr><td>face<\/td><td>\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e\u3092\u6307\u5b9a<\/td><td>\"Arial\"\u3001\"serif\"\u3001\"MS \u30b4\u30b7\u30c3\u30af\"<\/td><td>font-family \u30d7\u30ed\u30d1\u30c6\u30a3<\/td><\/tr>\n<\/tbody>\n<\/table>\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\">font\u30bf\u30b0\u306esize\u5c5e\u6027\u306f\u7279\u6b8a\u3067\u300c\u7d76\u5bfe\u30b5\u30a4\u30ba1\u301c7\u300d\u304b\u300c\u76f8\u5bfe\u30b5\u30a4\u30ba+1\u301c+7\u3001-1\u301c-6\u300d\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002\u300csize=\"7\"\u300d\u304c\u6700\u5927\u3067\u300csize=\"1\"\u300d\u304c\u6700\u5c0f\u3067\u3059\u3002\u3053\u308c\u306f\u30d4\u30af\u30bb\u30eb\u3084\u30dd\u30a4\u30f3\u30c8\u3067\u306f\u306a\u304f\u72ec\u81ea\u306e\u6570\u5024\u7cfb\u306a\u306e\u3067\u975e\u5e38\u306b\u6271\u3044\u306b\u304f\u304f\u3001CSS\u306efont-size\uff08px\u30fbem\u30fbrem\u7b49\uff09\u306e\u65b9\u304c\u306f\u308b\u304b\u306b\u76f4\u611f\u7684\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">FONT COLOR<\/span>\n  <span class=\"section-title\" style=\"display:block;\">font color\u3067\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">color\u5c5e\u6027\u306e\u57fa\u672c\u69cb\u6587\u3068\u4f7f\u3044\u65b9\u306e\u5b9f\u4f8b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">font\u30bf\u30b0\u306e<strong>color\u5c5e\u6027<\/strong>\u3067\u6587\u5b57\u306e\u8272\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u8272\u306e\u6307\u5b9a\u65b9\u6cd5\u306f\u300c\u30ab\u30e9\u30fc\u540d\uff08\u82f1\u8a9e\uff09\u300d\u300cHEX\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u300d\u300cRGB\u30ab\u30e9\u30fc\u300d\u306e3\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- \u30ab\u30e9\u30fc\u540d\u3067\u6307\u5b9a --&gt;\n&lt;font color=\"red\"&gt;\u8d64\u3044\u6587\u5b57&lt;\/font&gt;\n&lt;font color=\"blue\"&gt;\u9752\u3044\u6587\u5b57&lt;\/font&gt;\n&lt;font color=\"green\"&gt;\u7dd1\u306e\u6587\u5b57&lt;\/font&gt;\n\n&lt;!-- HEX\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u3067\u6307\u5b9a --&gt;\n&lt;font color=\"#FF0000\"&gt;\u8d64\uff08HEX\uff09&lt;\/font&gt;\n&lt;font color=\"#0066CC\"&gt;\u9752\uff08HEX\uff09&lt;\/font&gt;\n&lt;font color=\"#333333\"&gt;\u30c0\u30fc\u30af\u30b0\u30ec\u30fc\uff08HEX\uff09&lt;\/font&gt;\n\n&lt;!-- RGB\u5024\u3067\u6307\u5b9a --&gt;\n&lt;font color=\"rgb(255, 0, 0)\"&gt;\u8d64\uff08RGB\uff09&lt;\/font&gt;\n&lt;font color=\"rgb(0, 102, 204)\"&gt;\u9752\uff08RGB\uff09&lt;\/font&gt;<\/pre>\n<\/div>\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;\">HEX\u30ab\u30e9\u30fc\u306f6\u6841\u306e16\u9032\u6570\u3067RGB\u5024\u3092\u8868\u3059<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c#FF0000\u300d\u306eHEX\u30ab\u30e9\u30fc\u306fRRGGBB\u306e\u5f62\u5f0f\u3067\u3059\u3002FF\u306f16\u9032\u6570\u3067255\uff08\u8d64\u3092\u6700\u5927\uff09\u300100\u306f0\uff08\u7dd1\u3068\u9752\u306f0\uff09\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u300c#333333\u300d\u306e\u3088\u3046\u306b\u540c\u3058\u5024\u304c\u7e70\u308a\u8fd4\u3059\u5834\u5408\u306f\u300c#333\u300d\u30683\u6841\u306b\u7701\u7565\u3067\u304d\u307e\u3059\u3002\u30c7\u30b6\u30a4\u30f3\u30c4\u30fc\u30eb\uff08Figma\u30fbPhotoshop\u7b49\uff09\u306e\u30ab\u30e9\u30fc\u30d4\u30c3\u30ab\u30fc\u3067HEX\u5024\u3092\u30b3\u30d4\u30fc\u3057\u3066\u4f7f\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\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\">\u300cfont color\u3067\u6587\u5b57\u3092\u8d64\u304f\u3059\u308b\u300d\u306fHTML\u306e\u5165\u9580\u66f8\u306b\u5fc5\u305a\u8f09\u3063\u3066\u3044\u308b\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u73fe\u4ee3\u3067\u306f\u300c\u60aa\u3044\u30b3\u30fc\u30c9\u4f8b\u300d\u3068\u3057\u3066\u7d39\u4ecb\u3055\u308c\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002\u5165\u9580\u66f8\u3067font\u30bf\u30b0\u3092\u5b66\u3076\u306e\u306f\u69cb\u3044\u307e\u305b\u3093\u304c\u3001\u5b9f\u969b\u306eWeb\u5236\u4f5c\u3067\u306f\u5fc5\u305aCSS\u3092\u4f7f\u3046\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">COLOR TYPES<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u8272\u306e\u6307\u5b9a\u65b9\u6cd5\uff1a\u30ab\u30e9\u30fc\u540d\u30fbHEX\u30fbRGB\u30fbHSL<\/span>\n  <span class=\"section-desc\">HTML\u3068CSS\u3067\u4f7f\u3048\u308b\u5168\u3066\u306e\u8272\u306e\u6307\u5b9a\u5f62\u5f0f\u3092\u307e\u3068\u3081\u3066\u89e3\u8aac<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTML\u304a\u3088\u3073CSS\u3067\u8272\u3092\u6307\u5b9a\u3059\u308b\u306b\u306f<strong>\u30ab\u30e9\u30fc\u540d\u30fbHEX\u30b3\u30fc\u30c9\u30fbRGB\u30fbRGBA\u30fbHSL\u30fbHSLA<\/strong>\u306e6\u7a2e\u985e\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002font\u30bf\u30b0\uff08color\u5c5e\u6027\uff09\u3067\u3082CSS\u3067\u3082\u540c\u3058\u8868\u8a18\u3092\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u8272\u306e\u6307\u5b9a\u65b9\u6cd5<\/th><th>\u66f8\u5f0f<\/th><th>\u4f8b<\/th><th>\u7279\u5fb4<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30ab\u30e9\u30fc\u540d<\/td><td>color\u540d<\/td><td>red, blue, tomato, coral<\/td><td>\u76f4\u611f\u7684\u3002\u7d04140\u8272\u306e\u307f\u5bfe\u5fdc<\/td><\/tr>\n<tr><td>HEX\u30b3\u30fc\u30c9\uff086\u6841\uff09<\/td><td>#RRGGBB<\/td><td>#FF0000\uff08\u8d64\uff09\u3001#0066CC\uff08\u9752\uff09<\/td><td>\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u308b\u30026\u6841\u306e16\u9032\u6570<\/td><\/tr>\n<tr><td>HEX\u30b3\u30fc\u30c9\uff083\u6841\uff09<\/td><td>#RGB<\/td><td>#F00\uff08\u8d64\uff09\u3001#06C\uff08\u9752\uff09<\/td><td>6\u6841\u306e\u7701\u7565\u5f62\u3002\u540c\u3058\u5024\u304c\u7e70\u308a\u8fd4\u3059\u5834\u5408\u306e\u307f<\/td><\/tr>\n<tr><td>RGB<\/td><td>rgb(R, G, B)<\/td><td>rgb(255, 0, 0)<\/td><td>R\/G\/B\u54040\u301c255\u3067\u6307\u5b9a<\/td><\/tr>\n<tr><td>RGBA<\/td><td>rgba(R, G, B, A)<\/td><td>rgba(255, 0, 0, 0.5)<\/td><td>A=\u900f\u660e\u5ea6\uff080\u301c1\uff09\u3002\u534a\u900f\u660e\u3092\u8868\u73fe\u3067\u304d\u308b<\/td><\/tr>\n<tr><td>HSL<\/td><td>hsl(H, S%, L%)<\/td><td>hsl(0, 100%, 50%)\uff08\u8d64\uff09<\/td><td>H=\u8272\u76f80\u301c360\u3001S=\u5f69\u5ea6\u3001L=\u660e\u5ea6<\/td><\/tr>\n<tr><td>HSLA<\/td><td>hsla(H, S%, L%, A)<\/td><td>hsla(0, 100%, 50%, 0.5)<\/td><td>HSL\u306b\u900f\u660e\u5ea6\u3092\u8ffd\u52a0<\/td><\/tr>\n<\/tbody>\n<\/table>\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>HEX\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\uff0816\u9032\u6570\u30ab\u30e9\u30fc\uff09<\/strong>\uff1aHTML\u3084CSS\u3067\u8272\u3092\u6307\u5b9a\u3059\u308b\u300c#FF0000\u300d\u306e\u3088\u3046\u306a6\u6841\u306e16\u9032\u6570\u8868\u8a18\u3002\u300c#\u300d\u306e\u5f8c\u306bRed\uff08\u8d64\uff09\u30fbGreen\uff08\u7dd1\uff09\u30fbBlue\uff08\u9752\uff09\u54042\u6841\u306e16\u9032\u6570\uff0800\u301cFF\uff09\u304c\u7d9a\u304f\u3002FF\u306f255\uff08\u6700\u5927\uff09\u300100\u306f0\uff08\u6700\u5c0f\uff09\u3092\u610f\u5473\u3059\u308b\u3002\u300c#000000\u300d\u304c\u9ed2\uff08\u5168\u3066\u6700\u5c0f\uff09\u3001\u300c#FFFFFF\u300d\u304c\u767d\uff08\u5168\u3066\u6700\u5927\uff09\u3001\u300c#FF0000\u300d\u304c\u8d64\uff08\u8d64\u306e\u307f\u6700\u5927\uff09\u3002\u30c7\u30b6\u30a4\u30ca\u30fc\u304b\u3089\u6e21\u3055\u308c\u308b\u30c7\u30b6\u30a4\u30f3\u30ab\u30f3\u30d7\u306e\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u305d\u306e\u307e\u307eCSS\u306b\u8ee2\u8a18\u3057\u3066\u4f7f\u3046\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- HTML\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u30ab\u30e9\u30fc\u540d\u306e\u4f8b --&gt;\n&lt;font color=\"black\"&gt;\u9ed2: #000000&lt;\/font&gt;\n&lt;font color=\"white\"&gt;\u767d: #FFFFFF&lt;\/font&gt;\n&lt;font color=\"red\"&gt;\u8d64: #FF0000&lt;\/font&gt;\n&lt;font color=\"blue\"&gt;\u9752: #0000FF&lt;\/font&gt;\n&lt;font color=\"green\"&gt;\u7dd1: #008000&lt;\/font&gt;\n&lt;font color=\"gray\"&gt;\u30b0\u30ec\u30fc: #808080&lt;\/font&gt;\n&lt;font color=\"orange\"&gt;\u30aa\u30ec\u30f3\u30b8: #FFA500&lt;\/font&gt;\n&lt;font color=\"purple\"&gt;\u7d2b: #800080&lt;\/font&gt;\n&lt;font color=\"pink\"&gt;\u30d4\u30f3\u30af: #FFC0CB&lt;\/font&gt;\n&lt;font color=\"navy\"&gt;\u30cd\u30a4\u30d3\u30fc: #000080&lt;\/font&gt;\n&lt;font color=\"gold\"&gt;\u30b4\u30fc\u30eb\u30c9: #FFD700&lt;\/font&gt;\n&lt;font color=\"tomato\"&gt;\u30c8\u30de\u30c8\uff08\u8d64\u5bc4\u308a\uff09: #FF6347&lt;\/font&gt;<\/pre>\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\">\u30d7\u30ed\u306eWeb\u5236\u4f5c\u3067\u306f\u30ab\u30e9\u30fc\u540d\uff08\"red\"\u7b49\uff09\u306f\u307b\u307c\u4f7f\u3044\u307e\u305b\u3093\u3002\u30c7\u30b6\u30a4\u30f3\u30ab\u30f3\u30d7\u3067\u6307\u5b9a\u3055\u308c\u305fHEX\u30b3\u30fc\u30c9\u3084\u3001\u30c7\u30b6\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u3067\u5b9a\u7fa9\u3055\u308c\u305fCSS\u5909\u6570\uff08--color-primary: #DC2626;\u7b49\uff09\u3092\u305d\u306e\u307e\u307e\u4f7f\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u30ab\u30e9\u30fc\u540d\u306f\u5165\u9580\u5b66\u7fd2\u306e\u6bb5\u968e\u3067\u30b3\u30fc\u30c9\u304c\u77ed\u304f\u66f8\u3051\u308b\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u3060\u3051\u3067\u3001\u5b9f\u52d9\u3067\u306f\u6b63\u78ba\u306aHEX\u3084RGB\u3092\u4f7f\u3044\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">FONT SIZE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">font size\u3067\u6587\u5b57\u306e\u30b5\u30a4\u30ba\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">size\u5c5e\u6027\u306e1\u301c7\u306e\u6570\u5024\u6307\u5b9a\u3068\u76f8\u5bfe\u30b5\u30a4\u30ba\u6307\u5b9a\u306e\u4f7f\u3044\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">font\u30bf\u30b0\u306e<strong>size\u5c5e\u6027<\/strong>\u3067\u6587\u5b57\u306e\u30b5\u30a4\u30ba\u3092\u5909\u3048\u3089\u308c\u307e\u3059\u3002\u5024\u306f\u300c1\u301c7\u306e\u7d76\u5bfe\u5024\u300d\u304b\u300c+1\u301c+7\u3001-1\u301c-6\u306e\u76f8\u5bfe\u5024\u300d\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f3\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- \u7d76\u5bfe\u30b5\u30a4\u30ba\u3067\u6307\u5b9a\uff081\u301c7\uff09 --&gt;\n&lt;font size=\"1\"&gt;\u30b5\u30a4\u30ba1\uff08\u6700\u5c0f\uff09&lt;\/font&gt;\n&lt;font size=\"2\"&gt;\u30b5\u30a4\u30ba2&lt;\/font&gt;\n&lt;font size=\"3\"&gt;\u30b5\u30a4\u30ba3\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09&lt;\/font&gt;\n&lt;font size=\"4\"&gt;\u30b5\u30a4\u30ba4&lt;\/font&gt;\n&lt;font size=\"5\"&gt;\u30b5\u30a4\u30ba5&lt;\/font&gt;\n&lt;font size=\"6\"&gt;\u30b5\u30a4\u30ba6&lt;\/font&gt;\n&lt;font size=\"7\"&gt;\u30b5\u30a4\u30ba7\uff08\u6700\u5927\uff09&lt;\/font&gt;\n\n&lt;!-- \u76f8\u5bfe\u30b5\u30a4\u30ba\u3067\u6307\u5b9a\uff08\u73fe\u5728\u306e\u30c7\u30d5\u30a9\u30eb\u30c83\u3092\u57fa\u6e96\uff09 --&gt;\n&lt;font size=\"+2\"&gt;\u30c7\u30d5\u30a9\u30eb\u30c8+2 = \u30b5\u30a4\u30ba5&lt;\/font&gt;\n&lt;font size=\"-1\"&gt;\u30c7\u30d5\u30a9\u30eb\u30c8-1 = \u30b5\u30a4\u30ba2&lt;\/font&gt;<\/pre>\n<\/div>\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;\">font size\u306e\u6570\u5024\u306f\u30d4\u30af\u30bb\u30eb\u3067\u306f\u306a\u3044<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">font size\u5c5e\u6027\u306e\u300c1\u301c7\u300d\u306f\u30d4\u30af\u30bb\u30eb\u6570\u3067\u306f\u306a\u304f\u72ec\u81ea\u306e\u76f8\u5bfe\u7684\u306a\u30b5\u30a4\u30ba\u756a\u53f7\u3067\u3059\u3002\u5b9f\u969b\u306e\u30d4\u30af\u30bb\u30eb\u30b5\u30a4\u30ba\u306f\u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002CSS\u306efont-size: 16px\u3084font-size: 1.5em\u306e\u3088\u3046\u306b\u3001\u30d4\u30af\u30bb\u30eb\u3084em\u7b49\u3067\u76f4\u63a5\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3067\u304d\u308bCSS\u306e\u65b9\u304c\u306f\u308b\u304b\u306b\u67d4\u8edf\u3067\u3059\u3002<\/p>\n<\/div>\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>em\u3068rem\u306e\u9055\u3044\uff08CSS\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\uff09<\/strong>\uff1aCSS\u306efont-size\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u5358\u4f4d\u3002\u300cem\u300d\u306f\u89aa\u8981\u7d20\u306e\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u30921\u3068\u3057\u305f\u76f8\u5bfe\u5024\u3067\u3001\u89aa\u304c16px\u306a\u30891em=16px\u30012em=32px\u3068\u306a\u308b\u3002\u300crem\u300d\u306f\u30eb\u30fc\u30c8\u8981\u7d20\uff08html\u8981\u7d20\uff09\u306e\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u30921\u3068\u3057\u305f\u76f8\u5bfe\u5024\u3002rem\u306f\u89aa\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305a\u3001\u300chtml { font-size: 16px; }\u300d\u306a\u3089\u5e38\u306b1rem=16px\u3002\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u3067\u306frem\u3092\u4f7f\u3046\u306e\u304c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u3055\u308c\u308b\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">FONT FACE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">font face\u3067\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e\u3092\u5909\u3048\u308b\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">face\u5c5e\u6027\u3067\u30d5\u30a9\u30f3\u30c8\u30d5\u30a1\u30df\u30ea\u30fc\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">font\u30bf\u30b0\u306e<strong>face\u5c5e\u6027<\/strong>\u3067\u30c6\u30ad\u30b9\u30c8\u306e\u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u306ePC\u30fb\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306b\u305d\u306e\u30d5\u30a9\u30f3\u30c8\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a9\u30f3\u30c8\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- face\u5c5e\u6027\u3067\u30d5\u30a9\u30f3\u30c8\u3092\u6307\u5b9a --&gt;\n&lt;font face=\"Arial\"&gt;Arial \u30d5\u30a9\u30f3\u30c8\uff08\u30b5\u30f3\u30bb\u30ea\u30d5\u4f53\uff09&lt;\/font&gt;\n&lt;font face=\"Times New Roman\"&gt;Times New Roman\uff08\u30bb\u30ea\u30d5\u4f53\uff09&lt;\/font&gt;\n&lt;font face=\"Courier New\"&gt;Courier New\uff08\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\uff09&lt;\/font&gt;\n&lt;font face=\"Verdana\"&gt;Verdana \u30d5\u30a9\u30f3\u30c8&lt;\/font&gt;\n&lt;font face=\"MS \u30b4\u30b7\u30c3\u30af\"&gt;MS \u30b4\u30b7\u30c3\u30af\uff08\u65e5\u672c\u8a9e\u30d5\u30a9\u30f3\u30c8\uff09&lt;\/font&gt;\n\n&lt;!-- \u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u8907\u6570\u6307\u5b9a\uff08\u30ab\u30f3\u30de\u533a\u5207\u308a\uff09 --&gt;\n&lt;font face=\"Helvetica, Arial, sans-serif\"&gt;\n  Helvetica\u304c\u306a\u3051\u308c\u3070 Arial\u3001\u305d\u308c\u3082\u306a\u3051\u308c\u3070 sans-serif\n&lt;\/font&gt;<\/pre>\n<\/div>\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;\">\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b\u306e\u304c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">font\u30bf\u30b0\u306eface\u5c5e\u6027\u3067\u3082CSS\u306efont-family\u3067\u3082\u3001\u8907\u6570\u306e\u30d5\u30a9\u30f3\u30c8\u3092\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u4e26\u3079\u3066\u300c\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u300d\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u300cArial, Helvetica, sans-serif\u300d\u3068\u66f8\u3044\u305f\u5834\u5408\u3001Arial\u304c\u306a\u3044\u74b0\u5883\u3067\u306fHelvetica\u3092\u3001\u305d\u308c\u3082\u306a\u3044\u5834\u5408\u306f\u7dcf\u79f0\u30d5\u30a1\u30df\u30ea\u30fc\u306esans-serif\u3092\u4f7f\u3044\u307e\u3059\u3002\u6700\u5f8c\u306b\u5fc5\u305asans-serif\u30fbserif\u30fbmonospace\u306e\u3044\u305a\u308c\u304b\u306e\u7dcf\u79f0\u30d5\u30a1\u30df\u30ea\u30fc\u3092\u6307\u5b9a\u3059\u308b\u306e\u304c\u30eb\u30fc\u30eb\u3067\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\">\u300cface=\"MS \u30b4\u30b7\u30c3\u30af\"\u300d\u306e\u3088\u3046\u306a\u65e5\u672c\u8a9e\u30d5\u30a9\u30f3\u30c8\u306fWindows\u306b\u306e\u307f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001Mac\u30fbiPhone\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002Web\u30d5\u30a9\u30f3\u30c8\uff08Google Fonts\u3084Adobe Fonts\uff09\u3092\u4f7f\u3048\u3070\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u95a2\u4fc2\u306a\u304f\u7279\u5b9a\u306e\u30d5\u30a9\u30f3\u30c8\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u306ffont\u30bf\u30b0\u3067\u306f\u306a\u304fCSS\u3068link\u8981\u7d20\u3067\u8a2d\u5b9a\u3057\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">FONT DEPRECATED<\/span>\n  <span class=\"section-title\" style=\"display:block;\">font\u30bf\u30b0\u306e\u6ce8\u610f\u70b9\uff1a\u975e\u63a8\u5968\u3067CSS\u306b\u79fb\u884c\u3059\u3079\u304d\u7406\u7531<\/span>\n  <span class=\"section-desc\">HTML5\u3067font\u30bf\u30b0\u304c\u5ec3\u6b62\u3055\u308c\u305f\u7406\u7531\u3068HTML\/CSS\u306e\u95a2\u5fc3\u306e\u5206\u96e2<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">font\u30bf\u30b0\u3092HTML5\u3067\u4f7f\u3046\u3079\u304d\u3067\u306f\u306a\u3044\u7406\u7531\u306f\u3001<strong>\u300cHTML\u306f\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3001\u898b\u305f\u76ee\uff08\u30b9\u30bf\u30a4\u30eb\uff09\u306fCSS\u304c\u62c5\u5f53\u3059\u308b\u300d\u3068\u3044\u3046HTML\/CSS\u306e\u8a2d\u8a08\u601d\u60f3<\/strong>\u306b\u53cd\u3059\u308b\u304b\u3089\u3067\u3059\u3002<\/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>HTML\/CSS\u306e\u95a2\u5fc3\u306e\u5206\u96e2\uff08Separation of Concerns\uff09<\/strong>\uff1aWeb\u5236\u4f5c\u306b\u304a\u3051\u308b\u8a2d\u8a08\u539f\u5247\u306e1\u3064\u3002HTML\u306fWeb\u30da\u30fc\u30b8\u306e\u69cb\u9020\uff08\u898b\u51fa\u3057\u30fb\u6bb5\u843d\u30fb\u30ea\u30b9\u30c8\u7b49\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u610f\u5473\uff09\u3092\u5b9a\u7fa9\u3057\u3001CSS\u306f\u898b\u305f\u76ee\uff08\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30ec\u30a4\u30a2\u30a6\u30c8\u7b49\u306e\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\uff09\u3092\u62c5\u5f53\u3059\u308b\u3068\u3044\u3046\u5206\u62c5\u3002font\u30bf\u30b0\u306f1\u3064\u306eHTML\u30bf\u30b0\u3067\u300c\u898b\u305f\u76ee\u306e\u30b9\u30bf\u30a4\u30eb\u300d\u3092\u5b9a\u7fa9\u3057\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u3053\u306e\u539f\u5247\u306b\u53cd\u3059\u308b\u3002\u540c\u3058\u30b5\u30a4\u30c8\u5185\u306e100\u30da\u30fc\u30b8\u3067\u540c\u3058\u30d5\u30a9\u30f3\u30c8\u8a2d\u5b9a\u3092\u5909\u3048\u305f\u3044\u5834\u5408\u3001font\u30bf\u30b0\u3060\u3068100\u30da\u30fc\u30b8\u5168\u3066\u3092\u4fee\u6b63\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u304c\u3001CSS\u306a\u30891\u3064\u306eCSS\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u5168\u30da\u30fc\u30b8\u306b\u53cd\u6620\u3055\u308c\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>HTML 3.2\u6642\u4ee3<\/strong><br><span style=\"font-size:12px;\">font\u30bf\u30b0\u7b49\u3067<br>\u898b\u305f\u76ee\u3092\u5b9a\u7fa9<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>HTML 4.01<\/strong><br><span style=\"font-size:12px;\">CSS\u63a8\u5968\u3060\u304c<br>font\u30bf\u30b0\u306fdeprecated\u6271\u3044<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>HTML5<\/strong><br><span style=\"font-size:12px;\">font\u30bf\u30b0\u306f\u5ec3\u6b62<br>obsolete\u306b\u5206\u985e<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>\u73fe\u4ee3\uff082026\u5e74\uff09<\/strong><br><span style=\"font-size:12px;\">CSS\u304c\u552f\u4e00\u306e<br>\u6b63\u3057\u3044\u30b9\u30bf\u30a4\u30eb\u65b9\u6cd5<\/span><\/div>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u89b3\u70b9<\/th><th>font\u30bf\u30b0\uff08\u65e7\uff09<\/th><th>CSS\uff08\u73fe\u4ee3\uff09<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30c7\u30b6\u30a4\u30f3\u5909\u66f4\u306e\u624b\u9593<\/td><td>\u5168\u30da\u30fc\u30b8\u306e\u5168font\u30bf\u30b0\u30921\u3064\u305a\u3064\u4fee\u6b63<\/td><td>CSS\u30d5\u30a1\u30a4\u30eb1\u304b\u6240\u3092\u5909\u66f4\u3059\u308b\u3060\u3051<\/td><\/tr>\n<tr><td>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3<\/td><td>\u898b\u305f\u76ee\u3068\u610f\u5473\u304c\u6df7\u5728\uff08\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u306b\u4e0d\u5229\uff09<\/td><td>\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3068\u898b\u305f\u76ee\u304c\u5206\u96e2<\/td><\/tr>\n<tr><td>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc<\/td><td>\u96e3\u3057\u3044\uff08\u56fa\u5b9a\u30b5\u30a4\u30ba\u306e\u307f\uff09<\/td><td>\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3067\u753b\u9762\u30b5\u30a4\u30ba\u5225\u6307\u5b9a\u304c\u53ef\u80fd<\/td><\/tr>\n<tr><td>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/td><td>HTML5\u30d0\u30ea\u30c7\u30fc\u30bf\u30fc\u3067\u30a8\u30e9\u30fc<\/td><td>HTML5\u6e96\u62e0<\/td><\/tr>\n<tr><td>SEO<\/td><td>\u8efd\u5fae\u306a\u30de\u30a4\u30ca\u30b9\u5f71\u97ff\uff08\u53e4\u3044\u5b9f\u88c5\u306e\u8a55\u4fa1\uff09<\/td><td>\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9HTML\u304c\u8a55\u4fa1\u3055\u308c\u308b<\/td><\/tr>\n<\/tbody>\n<\/table>\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;\">font\u30bf\u30b0\u3092\u65b0\u898f\u30b3\u30fc\u30c9\u306b\u66f8\u3044\u3066\u306f\u3044\u3051\u306a\u3044<\/strong><\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">HTML5\u3067\u306f\u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u5f8c\u65b9\u4e92\u63db\u6027\u306e\u305f\u3081\u30d6\u30e9\u30a6\u30b6\u306ffont\u30bf\u30b0\u3092\u8868\u793a\u3057\u307e\u3059\u304c\u3001\u65b0\u898f\u4f5c\u6210\u3059\u308bHTML\u306bfont\u30bf\u30b0\u3092\u66f8\u304f\u306e\u306f\u7d76\u5bfe\u306b\u907f\u3051\u3066\u304f\u3060\u3055\u3044\u3002W3C\u306eHTML5\u4ed5\u69d8\u3067\u306f\u660e\u793a\u7684\u306b\u300c\u4f7f\u3063\u3066\u306f\u306a\u3089\u306a\u3044\uff08MUST NOT\uff09\u300d\u3068\u8a18\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u65e2\u5b58\u306e\u53e4\u3044\u30b3\u30fc\u30c9\u306efont\u30bf\u30b0\u306f\u898b\u3064\u3051\u6b21\u7b2cCSS\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\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\">HTML\u306e\u5b66\u7fd2\u521d\u671f\u306bfont\u30bf\u30b0\u3092\u899a\u3048\u308b\u3053\u3068\u306f\u300c\u3069\u3093\u306a\u6a5f\u80fd\u304c\u3042\u3063\u305f\u304b\u300d\u3092\u77e5\u308b\u4e0a\u3067\u6709\u76ca\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u899a\u3048\u305f\u3089\u300c\u73fe\u4ee3\u3067\u306f\u3053\u308c\u306fNG\u30b3\u30fc\u30c9\u300d\u3068\u8a8d\u8b58\u3057\u3066\u3001\u5fc5\u305aCSS\u306e\u66f8\u304d\u65b9\u306b\u7f6e\u304d\u63db\u3048\u308b\u7fd2\u6163\u3092\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u9762\u63a5\u3067font\u30bf\u30b0\u3092\u66f8\u304f\u3068\u5373\u4e0d\u5408\u683c\u306b\u306a\u308b\u307b\u3069\u3001\u73fe\u5834\u3067\u306f\u7981\u5fcc\u3068\u3055\u308c\u3066\u3044\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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;\">CSS COLOR<\/span>\n  <span class=\"section-title\" style=\"display:block;\">CSS\u306ecolor\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u6587\u5b57\u8272\u3092\u5909\u3048\u308b\uff08\u73fe\u4ee3\u306e\u65b9\u6cd5\uff09<\/span>\n  <span class=\"section-desc\">font color\u5c5e\u6027\u306e\u73fe\u4ee3\u306e\u6b63\u3057\u3044\u4ee3\u66ff\uff1aCSS\u306ecolor\u30d7\u30ed\u30d1\u30c6\u30a3<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u4ee3\u306eHTML\/CSS\u3067\u306f\u3001\u6587\u5b57\u306e\u8272\u306fCSS\u306e<strong>color\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002HTML\u306b\u306fcss\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u3067\u66f8\u304f\u65b9\u6cd5\u3068\u3001\u5225\u306eCSS\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304f\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#f97316;margin-bottom:6px;letter-spacing:1px;\">CSS<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">\/* \u5916\u90e8CSS\u30d5\u30a1\u30a4\u30eb\uff08style.css\u7b49\uff09\u306b\u66f8\u304f\u65b9\u6cd5 *\/\n.text-red { color: red; }\n.text-blue { color: #0066CC; }\n.text-dark { color: #333333; }\n\n\/* RGBA\uff08\u534a\u900f\u660e\u30c6\u30ad\u30b9\u30c8\uff09*\/\n.text-transparent { color: rgba(0, 0, 0, 0.5); }\n\n\/* CSS\u5909\u6570\u3092\u4f7f\u3046\uff08\u30c7\u30b6\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u7528\uff09 *\/\n:root {\n  --color-primary: #DC2626;\n  --color-text: #1a1a1a;\n}\n.heading { color: var(--color-primary); }\n.body-text { color: var(--color-text); }<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#58a6ff;margin-bottom:6px;letter-spacing:1px;\">HTML<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">&lt;!-- \u30a4\u30f3\u30e9\u30a4\u30f3style\u5c5e\u6027\uff08\u63a8\u5968\u5ea6\u306f\u4f4e\u3044\uff09 --&gt;\n&lt;p style=\"color: red;\"&gt;\u8d64\u3044\u6587\u5b57&lt;\/p&gt;\n&lt;p style=\"color: #0066CC;\"&gt;\u9752\u3044\u6587\u5b57&lt;\/p&gt;\n&lt;p style=\"color: rgba(255, 0, 0, 0.5);\"&gt;\u534a\u900f\u660e\u306e\u8d64&lt;\/p&gt;\n\n&lt;!-- CSS\u30af\u30e9\u30b9\u3092\u4f7f\u3046\uff08\u63a8\u5968\uff09 --&gt;\n&lt;p class=\"text-primary\"&gt;\u30d7\u30e9\u30a4\u30de\u30ea\u30ab\u30e9\u30fc\u306e\u6587\u5b57&lt;\/p&gt;\n&lt;p class=\"text-secondary\"&gt;\u30bb\u30ab\u30f3\u30c0\u30ea\u30ab\u30e9\u30fc\u306e\u6587\u5b57&lt;\/p&gt;\n\n&lt;!-- span\u30bf\u30b0\u3067\u30c6\u30ad\u30b9\u30c8\u306e\u4e00\u90e8\u3060\u3051\u306b\u8272\u3092\u9069\u7528 --&gt;\n&lt;p&gt;\u901a\u5e38\u30c6\u30ad\u30b9\u30c8\u3001&lt;span style=\"color: red;\"&gt;\u3053\u3053\u3060\u3051\u8d64&lt;\/span&gt;\u3001\u307e\u305f\u901a\u5e38\u30c6\u30ad\u30b9\u30c8&lt;\/p&gt;<\/pre>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>CSS\u30af\u30e9\u30b9\u5b9a\u7fa9<\/strong><br><span style=\"font-size:12px;\">style.css\u306b<br>.text-red{color:red}\u7b49<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>HTML\u306b\u9069\u7528<\/strong><br><span style=\"font-size:12px;\">class=\"text-red\"<br>\u3067\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>\u30d6\u30e9\u30a6\u30b6\u89e3\u91c8<\/strong><br><span style=\"font-size:12px;\">HTML\u3068CSS\u3092\u5408\u308f\u305b\u3066<br>\u63cf\u753b<\/span><\/div>  <div class=\"g-flow-arrow\">&#8594;<\/div>  <div class=\"g-flow-item\"><strong>\u30c7\u30b6\u30a4\u30f3\u5909\u66f4<\/strong><br><span style=\"font-size:12px;\">CSS\u306e1\u884c\u3060\u3051\u5909\u66f4\u3067<br>\u5168\u4f53\u306b\u53cd\u6620<\/span><\/div>\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\u30af\u30e9\u30b9\u3067color\u3092\u7ba1\u7406\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u300c\u5909\u66f4\u304c1\u304b\u6240\u3067\u6e08\u3080\u300d\u3053\u3068\u3067\u3059\u3002\u30b5\u30a4\u30c8\u5168\u4f53\u306e\u898b\u51fa\u3057\u8272\u3092\u5909\u3048\u305f\u3044\u5834\u5408\u3001font\u30bf\u30b0\u306a\u3089\u5168\u30da\u30fc\u30b8\u3092\u624b\u52d5\u3067\u4fee\u6b63\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001CSS\u306a\u3089\u300c.heading { color: ... }\u300d\u306e\u5024\u30921\u56de\u5909\u3048\u308b\u3060\u3051\u3067\u5168\u3066\u306e\u898b\u51fa\u3057\u306b\u53cd\u6620\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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-08\"><\/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;\">08<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CSS FONT<\/span>\n  <span class=\"section-title\" style=\"display:block;\">CSS\u306efont-size\/font-family\u3067\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u3092\u5909\u3048\u308b<\/span>\n  <span class=\"section-desc\">font size\u3068font face\u306e\u73fe\u4ee3\u306eCSS\u4ee3\u66ff\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u4f7f\u3044\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">font\u30bf\u30b0\u306esize\u5c5e\u6027\u30fbface\u5c5e\u6027\u306b\u5bfe\u5fdc\u3059\u308bCSS\u30d7\u30ed\u30d1\u30c6\u30a3\u306f<strong>font-size\u30fbfont-family<\/strong>\u3067\u3059\u3002\u3053\u308c\u3089\u306fCSS\u306e\u57fa\u790e\u4e2d\u306e\u57fa\u790e\u3068\u3057\u3066\u3001\u5168\u3066\u306eWeb\u5236\u4f5c\u8005\u304c\u7fd2\u5f97\u3059\u3079\u304d\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#0d1117;border-radius:8px;padding:16px 20px;margin:16px 0;overflow-x:auto;\">\n  <div style=\"font-size:11px;color:#f97316;margin-bottom:6px;letter-spacing:1px;\">CSS<\/div>\n  <pre style=\"margin:0;font-family:'Courier New',Consolas,monospace;font-size:14px;line-height:1.8;color:#c9d1d9;white-space:pre;\">\/* font-size: \u6587\u5b57\u30b5\u30a4\u30ba\u6307\u5b9a *\/\nh1 { font-size: 32px; }    \/* \u30d4\u30af\u30bb\u30eb\u6307\u5b9a *\/\np  { font-size: 1rem; }    \/* rem\uff08\u30eb\u30fc\u30c8\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u57fa\u6e96\uff09 *\/\nsmall { font-size: 0.875rem; } \/* 14px\u76f8\u5f53\uff0816px\u30d9\u30fc\u30b9\uff09 *\/\n.large { font-size: 1.25em; } \/* \u89aa\u8981\u7d20\u306e1.25\u500d *\/\n\n\/* \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\uff08\u753b\u9762\u30b5\u30a4\u30ba\u3067\u5909\u3048\u308b\uff09 *\/\nh1 { font-size: 24px; }\n@media (min-width: 768px) {\n  h1 { font-size: 36px; }\n}\n\n\/* font-family: \u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u6307\u5b9a *\/\nbody {\n  font-family: -apple-system, BlinkMacSystemFont, \"Hiragino Kaku Gothic ProN\",\n               \"Hiragino Sans\", \"\u30e1\u30a4\u30ea\u30aa\", Meiryo, sans-serif;\n}\ncode {\n  font-family: \"Courier New\", Consolas, \"Lucida Console\", monospace;\n}\n\n\/* Google Fonts\uff08Web\u30d5\u30a9\u30f3\u30c8\uff09\u306e\u8aad\u307f\u8fbc\u307f *\/\n\/* HTML\u306ehead\u306b: &lt;link href=\"https:\/\/fonts.googleapis.com\/css2?family=Noto+Sans+JP&amp;display=swap\" rel=\"stylesheet\"&gt; *\/\nbody { font-family: \"Noto Sans JP\", sans-serif; }<\/pre>\n<\/div>\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>\u30b7\u30b9\u30c6\u30e0\u30d5\u30a9\u30f3\u30c8\u30b9\u30bf\u30c3\u30af\uff08system-ui\uff09<\/strong>\uff1aOS\u3084\u7aef\u672b\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u30d5\u30a9\u30f3\u30c8\u3092\u512a\u5148\u3057\u3066\u4f7f\u3046\u8a2d\u5b9a\u3002\u300c-apple-system\u300d\u306fApple\u30c7\u30d0\u30a4\u30b9\u3067San Francisco\u3092\u4f7f\u3044\u3001\u300cBlinkMacSystemFont\u300d\u306fmacOS Chrome\u3067San Francisco\u3092\u4f7f\u3044\u3001\u300cMeiryo\u300d\u306fWindows\u3067\u6e38\u660e\u671d\u3088\u308a\u8aad\u307f\u3084\u3059\u3044\u30d5\u30a9\u30f3\u30c8\u3092\u4f7f\u3046\u3002Web\u30d5\u30a9\u30f3\u30c8\uff08\u5916\u90e8\u30d5\u30a9\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\uff09\u3092\u4f7f\u308f\u306a\u3044\u305f\u3081\u8aad\u307f\u8fbc\u307f\u304c\u901f\u304f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u6163\u308c\u89aa\u3057\u3093\u3060\u30d5\u30a9\u30f3\u30c8\u3067\u8868\u793a\u3055\u308c\u308b\u3002\u30d7\u30ed\u306eWeb\u5236\u4f5c\u3067\u3082\u30b7\u30b9\u30c6\u30e0\u30d5\u30a9\u30f3\u30c8\u30b9\u30bf\u30c3\u30af\u306ffont-family\u306e\u4e00\u822c\u7684\u306a\u9078\u629e\u80a2\u306e1\u3064\u3002<\/p>\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\">\u30e2\u30d0\u30a4\u30eb\u5bfe\u5fdc\u306eWeb\u30b5\u30a4\u30c8\u3067\u306ffont-size\u306bpx\u3088\u308a\u300crem\u300d\u3084\u300cem\u300d\u3092\u4f7f\u3046\u65b9\u304c\u9069\u5207\u3067\u3059\u3002px\u306f\u56fa\u5b9a\u30b5\u30a4\u30ba\u306a\u306e\u3067\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u6587\u5b57\u304c\u5c0f\u3055\u3059\u304e\u308b\u30fb\u5927\u304d\u3059\u304e\u308b\u554f\u984c\u304c\u8d77\u304d\u3084\u3059\u3044\u3067\u3059\u3002\u300c1rem = \u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d5\u30a9\u30eb\u30c816px\u300d\u3092\u57fa\u6e96\u306b\u3001\u898b\u51fa\u3057\u306f2rem\u30fb\u672c\u6587\u306f1rem\u30fb\u6ce8\u91c8\u306f0.875rem\u306e\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u306e\u304c\u73fe\u4ee3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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-09\"><\/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;\">09<\/span>\n  <span class=\"section-label\" style=\"display:block;\">MIGRATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">font\u30bf\u30b0\u304b\u3089CSS\u3078\u306e\u66f8\u304d\u63db\u3048\u65b9\uff1a\u79fb\u884c\u30d1\u30bf\u30fc\u30f3\u96c6<\/span>\n  <span class=\"section-desc\">\u53e4\u3044font\u30bf\u30b0\u306e\u5178\u578b\u30d1\u30bf\u30fc\u30f3\u3092CSS\u306b\u7f6e\u304d\u63db\u3048\u308b\u30b5\u30f3\u30d7\u30eb\u96c6<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e4\u3044\u30b5\u30a4\u30c8\u306b\u6b8b\u308bfont\u30bf\u30b0\u3092CSS\u306b\u66f8\u304d\u63db\u3048\u308b\u5178\u578b\u30d1\u30bf\u30fc\u30f3\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>font\u30bf\u30b0\uff08\u65e7\uff09<\/th><th>CSS\u7248\uff08\u73fe\u4ee3\uff09<\/th><th>\u4f7f\u7528\u5834\u9762<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><font color=\"red\">\u30c6\u30ad\u30b9\u30c8<\/font><\/td><td><span style=\"color:red\">\u30c6\u30ad\u30b9\u30c8<\/span><\/td><td>\u672c\u6587\u4e2d\u306e\u4e00\u90e8\u3060\u3051\u8272\u5909\u66f4<\/td><\/tr>\n<tr><td><font size=\"5\">\u5927\u304d\u3044\u898b\u51fa\u3057<\/font><\/td><td><h2 style=\"font-size:1.5rem\">\u5927\u304d\u3044\u898b\u51fa\u3057<\/h2><\/td><td>\u898b\u51fa\u3057\u8981\u7d20<\/td><\/tr>\n<tr><td><font face=\"Arial\">\u30c6\u30ad\u30b9\u30c8<\/font><\/td><td><p style=\"font-family:Arial,sans-serif\">\u30c6\u30ad\u30b9\u30c8<\/p><\/td><td>\u30d5\u30a9\u30f3\u30c8\u6307\u5b9a<\/td><\/tr>\n<tr><td><font color=\"#0066cc\" size=\"4\">\u30ea\u30f3\u30af\u30c6\u30ad\u30b9\u30c8<\/font><\/td><td>.link{color:#0066cc;font-size:1.1rem}<\/td><td>CSS\u30af\u30e9\u30b9\u5316<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a,#2a1015);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:#dc2626;font-weight:700;letter-spacing:1px;\">VERDICT<\/div>\n    <div style=\"font-size:18px;font-weight:800;\">\u65b0\u898f\u30b3\u30fc\u30c9\u306f100% CSS\u3001\u53e4\u3044font\u30bf\u30b0\u306fCSS\u79fb\u884c\u304c\u6b63\u89e3<\/div>\n    <div style=\"font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px;\">\u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u6539\u4fee\u3067font\u30bf\u30b0\u306b\u51fa\u4f1a\u3063\u305f\u3089CSS\u306b\u7f6e\u304d\u63db\u3048\u308b\u3002\u65b0\u898f\u306eHTML\u3067\u306ffont\u30bf\u30b0\u3092\u66f8\u304b\u306a\u3044\u3002\u3053\u306e2\u3064\u306e\u30eb\u30fc\u30eb\u3092\u5b88\u308c\u3070\u3001\u73fe\u4ee3\u306eHTML\/CSS\u6a19\u6e96\u306b\u6e96\u62e0\u3057\u305f\u5b9f\u88c5\u304c\u3067\u304d\u308b\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-font-tag&#038;blog_slug=cc-html-font-tag\" 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-font-tag&#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-10\"><\/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;\">10<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CLAUDE CODE HTML<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067HTML\u306e\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u3092\u52b9\u7387\u5316\u3059\u308b<\/span>\n  <span class=\"section-desc\">font\u30bf\u30b0\u306e\u4e00\u62ecCSS\u3078\u306e\u66f8\u304d\u63db\u3048\u304b\u3089\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u307e\u3067<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HTML\u306efont\u30bf\u30b0\u306b\u3064\u3044\u3066\u7406\u89e3\u3067\u304d\u305f\u3068\u3053\u308d\u3067\u3001<strong>Claude Code\u304cHTML\u306e\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u4f5c\u696d\u3092\u3069\u3046\u52b9\u7387\u5316\u3059\u308b\u304b<\/strong>\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u3042\u306a\u305f\u306e\u4f9d\u983c<\/th><th>Claude Code\u304c\u5b9f\u884c\u3059\u308b\u3053\u3068<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u300c\u3053\u306eHTML\u306efont\u30bf\u30b0\u3092\u5168\u3066CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u300d<\/td><td>font\u30bf\u30b0\u3092\u5168\u3066\u691c\u51fa\u3057\u3066\u5bfe\u5fdc\u3059\u308bCSS\u30af\u30e9\u30b9\u3068HTML\u66f8\u304d\u63db\u3048\u3092\u63d0\u6848<\/td><\/tr>\n<tr><td>\u300c\u3053\u306e\u30c7\u30b6\u30a4\u30f3\u30ab\u30f3\u30d7\u306b\u5408\u308f\u305b\u3066CSS\u3092\u66f8\u3044\u3066\u300d<\/td><td>\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u30fb\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u3092CSS\u3067\u5b9f\u88c5<\/td><\/tr>\n<tr><td>\u300c\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u3082\u898b\u3084\u3059\u3044\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u306b\u3057\u3066\u300d<\/td><td>\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3068rem\u30d9\u30fc\u30b9\u306efont-size\u3092\u5b9f\u88c5<\/td><\/tr>\n<tr><td>\u300c\u3053\u306e\u30b5\u30a4\u30c8\u306e\u30ab\u30e9\u30fc\u30d1\u30ec\u30c3\u30c8\u3092CSS\u5909\u6570\u3067\u7ba1\u7406\u3059\u308b\u8a2d\u8a08\u306b\u3057\u3066\u300d<\/td><td>:root\u5909\u6570\u3068\u30ab\u30e9\u30fc\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u3092\u63d0\u6848<\/td><\/tr>\n<\/tbody>\n<\/table>\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>\u53e4\u3044\u30b5\u30a4\u30c8\u306efont\u30bf\u30b0\u3092\u4e00\u62ec\u3067CSS\u79fb\u884c<\/strong>\u3059\u308b\u969b\u306b\u3001HTML\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u300cCSS\u306b\u66f8\u304d\u63db\u3048\u3066\u300d\u3068\u4f9d\u983c<\/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>\u30c7\u30b6\u30a4\u30f3\u30ab\u30f3\u30d7\uff08Figma\u3084XD\uff09<\/strong>\u306e\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u3066CSS\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210<\/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>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306efont-size\u306e\u8a2d\u8a08<\/strong>\u3092\u300c\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u30fb\u30bf\u30d6\u30ec\u30c3\u30c8\u30fbPC\u3067\u9069\u5207\u306a\u30b5\u30a4\u30ba\u306b\u300d\u3068\u4f9d\u983c<\/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>\u30d5\u30a9\u30f3\u30c8\u304c\u306a\u3044\u74b0\u5883\u5411\u3051\u306e<strong>\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u8a2d\u8a08<\/strong>\u3092\u300c\u30b7\u30b9\u30c6\u30e0\u30d5\u30a9\u30f3\u30c8\u30b9\u30bf\u30c3\u30af\u3067\u5b9f\u88c5\u3057\u3066\u300d\u3068\u4f9d\u983c<\/span><\/div>\n\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\">\u5f0a\u793e\u3067\u306f\u53e4\u3044WordPress\u30b5\u30a4\u30c8\u306e\u30ea\u30cb\u30e5\u30fc\u30a2\u30eb\u6848\u4ef6\u3067font\u30bf\u30b0\u304c\u6570\u767e\u304b\u6240\u6b8b\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u30b5\u30a4\u30c8\u5168\u4f53\u306eHTML\u3092Claude Code\u306b\u6e21\u3057\u3066\u300cfont\u30bf\u30b0\u3092\u5168\u90e8CSS\u30af\u30e9\u30b9\u306b\u66f8\u304d\u63db\u3048\u3066\u3001\u30b9\u30bf\u30a4\u30eb\u306fCSS\u5909\u6570\u3067\u7ba1\u7406\u3059\u308b\u3088\u3046\u8a2d\u8a08\u3057\u3066\u300d\u3068\u4f9d\u983c\u3057\u305f\u3089\u3001CSS\u30d5\u30a1\u30a4\u30eb\u306e\u8a2d\u8a08\u304b\u3089HTML\u66f8\u304d\u63db\u3048\u306e\u65b9\u91dd\u307e\u30671\u6642\u9593\u3067\u5b8c\u6210\u3057\u307e\u3057\u305f\u3002\u624b\u4f5c\u696d\u306a\u30893\u301c4\u65e5\u304b\u304b\u308b\u4f5c\u696d\u3067\u3057\u305f\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">HTML\u306e\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\u3082Claude Code\u3067\u52b9\u7387\u5316\u3067\u304d\u307e\u3059<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u53e4\u3044\u30b5\u30a4\u30c8\u306efont\u30bf\u30b0\u3092CSS\u306b\u79fb\u884c\u3057\u305f\u3044\u300d\u300c\u30c7\u30b6\u30a4\u30f3\u30ab\u30f3\u30d7\u3092CSS\u306b\u5b9f\u88c5\u3057\u305f\u3044\u300d\u300c\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306e\u30d5\u30a9\u30f3\u30c8\u8a2d\u8a08\u304c\u5206\u304b\u3089\u306a\u3044\u300d\u2014\u2014\u3053\u3046\u3057\u305fHTML\/CSS\u306e\u8ab2\u984c\u306fClaude Code\u3067\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u76f8\u8ac7\u3067\u3069\u3093\u306aWeb\u30b5\u30a4\u30c8\u6539\u5584\u304c\u5fc5\u8981\u304b\u3092\u30d2\u30a2\u30ea\u30f3\u30b0\u3055\u305b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\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-font-tag&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. HTML\u3067\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u73fe\u4ee3\u306e\u6b63\u3057\u3044\u65b9\u6cd5\u306fCSS\u306ecolor\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3046\u3053\u3068\u3067\u3059\u3002\u300c<p style=\"color: red;\">\u8d64\u3044\u6587\u5b57<\/p>\u300d\u306e\u3088\u3046\u306b\u30a4\u30f3\u30e9\u30a4\u30f3style\u3067\u66f8\u304f\u304b\u3001\u300c.text-red { color: red; }\u300d\u3068CSS\u30d5\u30a1\u30a4\u30eb\u306b\u5b9a\u7fa9\u3057\u3066class\u5c5e\u6027\u3067\u9069\u7528\u3057\u307e\u3059\u3002font\u30bf\u30b0\u306ecolor\u5c5e\u6027\uff08<font color=\"red\">\uff09\u306fHTML5\u3067\u306f\u5ec3\u6b62\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u65b0\u898f\u30b3\u30fc\u30c9\u306b\u306f\u4f7f\u308f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. HTML\u306efont\u30bf\u30b0\u306f\u307e\u3060\u4f7f\u3048\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u73fe\u4ee3\u306e\u30d6\u30e9\u30a6\u30b6\u306ffont\u30bf\u30b0\u3092\u8868\u793a\u3057\u307e\u3059\u304c\u3001HTML5\u3067\u306f\u6b63\u5f0f\u306b\u5ec3\u6b62\uff08obsolete\uff09\u3068\u3055\u308c\u3066\u304a\u308a\u4f7f\u7528\u306f\u7981\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002W3C\u306eHTML5\u4ed5\u69d8\u3067\u306f\u300cMUST NOT\u300d\u3068\u660e\u8a18\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u65e2\u5b58\u306e\u53e4\u3044\u30b3\u30fc\u30c9\u306b\u6b8b\u3063\u3066\u3044\u308bfont\u30bf\u30b0\u306f\u3001CSS\u306b\u79fb\u884c\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. HTML\u306e\u6587\u5b57\u3092\u8d64\u304f\u3059\u308b\u30b3\u30fc\u30c9\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. CSS\u3092\u4f7f\u3046\u5834\u5408\u306f\u300c<span style=\"color: red;\">\u8d64\u3044\u6587\u5b57<\/span>\u300d\u307e\u305f\u306f\u300c<span style=\"color: #FF0000;\">\u8d64\u3044\u6587\u5b57<\/span>\u300d\u3067\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u5168\u4f53\u3092\u8d64\u304f\u3059\u308b\u5834\u5408\u306f\u300c<p style=\"color: red;\">\u6bb5\u843d\u5168\u4f53\u304c\u8d64<\/p>\u300d\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u53e4\u3044\u65b9\u6cd5\u306efont\u30bf\u30b0\uff08<font color=\"red\">\uff09\u306fHTML5\u3067\u5ec3\u6b62\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u4f7f\u308f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. HEX\u30ab\u30e9\u30fc\u30b3\u30fc\u30c9\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\u3069\u3046\u4f7f\u3044\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u300c#FF0000\u300d\u306e\u3088\u3046\u306a6\u6841\u306e16\u9032\u6570\u3067\u8272\u3092\u8868\u3059\u65b9\u6cd5\u3067\u3059\u3002RR\uff08\u8d64\uff09\u30fbGG\uff08\u7dd1\uff09\u30fbBB\uff08\u9752\uff09\u306e\u54042\u6841\u3067255\u6bb5\u968e\uff0800\u301cFF\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002#000000\u304c\u9ed2\u3001#FFFFFF\u304c\u767d\u3001#FF0000\u304c\u8d64\u3001#0000FF\u304c\u9752\u3067\u3059\u3002CSS\u3067\u300ccolor: #FF0000;\u300d\u300ccolor: #333;\uff08\u7701\u7565\u5f62\uff09\u300d\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. font face\u3068CSS font-family\u306e\u9055\u3044\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u4e21\u65b9\u3068\u3082\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e\u3092\u6307\u5b9a\u3057\u307e\u3059\u304c\u3001font\u30bf\u30b0\u306eface\u5c5e\u6027\u306fHTML5\u3067\u5ec3\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u73fe\u4ee3\u3067\u306fCSS\u306efont-family\u3092\u4f7f\u3044\u307e\u3059\u3002\u300cfont-family: Arial, sans-serif;\u300d\u306e\u3088\u3046\u306b\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b\u306e\u304c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002Web\u30d5\u30a9\u30f3\u30c8\uff08Google Fonts\u7b49\uff09\u3082CSS\u306efont-family\u3067\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. CSS color\u30d7\u30ed\u30d1\u30c6\u30a3\u3068font color\u306e\u9055\u3044\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u6a5f\u80fd\u306f\u540c\u3058\uff08\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\uff09\u3067\u3059\u304c\u3001font\u30bf\u30b0\u306ecolor\u5c5e\u6027\u306fHTML5\u3067\u5ec3\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002CSS color\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u73fe\u4ee3\u306e\u6b63\u3057\u3044\u65b9\u6cd5\u3067\u3059\u3002CSS\u306e\u5834\u5408\u3001\u5916\u90e8CSS\u30d5\u30a1\u30a4\u30eb\u3067\u4e00\u5143\u7ba1\u7406\u3067\u304d\u308b\u305f\u3081\u300c\u5f8c\u304b\u3089\u4e00\u62ec\u5909\u66f4\u304c\u7c21\u5358\u300d\u3068\u3044\u3046\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Claude Code\u3067HTML\u306efont\u30bf\u30b0\u3092CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u3082\u3089\u3048\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u3067\u304d\u307e\u3059\u3002font\u30bf\u30b0\u304c\u542b\u307e\u308c\u308bHTML\u3092Claude Code\u306b\u8cbc\u308a\u4ed8\u3051\u3066\u300cfont\u30bf\u30b0\u3092\u5168\u3066CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u3092\u9069\u5207\u306aCSS\u306b\u5909\u63db\u3057\u3001\u7e70\u308a\u8fd4\u3057\u4f7f\u308f\u308c\u308b\u30b9\u30bf\u30a4\u30eb\u306f\u30af\u30e9\u30b9\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u5927\u91cf\u306efont\u30bf\u30b0\u304c\u6b8b\u308b\u53e4\u3044\u30b5\u30a4\u30c8\u306e\u30ea\u30cb\u30e5\u30fc\u30a2\u30eb\u306b\u7279\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  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color=\\\"red\\\">\uff09\u306fHTML5\u3067\u306f\u5ec3\u6b62\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u65b0\u898f\u30b3\u30fc\u30c9\u306b\u306f\u4f7f\u308f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"HTML\u306efont\u30bf\u30b0\u306f\u307e\u3060\u4f7f\u3048\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u73fe\u4ee3\u306e\u30d6\u30e9\u30a6\u30b6\u306ffont\u30bf\u30b0\u3092\u8868\u793a\u3057\u307e\u3059\u304c\u3001HTML5\u3067\u306f\u6b63\u5f0f\u306b\u5ec3\u6b62\uff08obsolete\uff09\u3068\u3055\u308c\u3066\u304a\u308a\u4f7f\u7528\u306f\u7981\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002W3C\u306eHTML5\u4ed5\u69d8\u3067\u306f\u300cMUST 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\"\u300c#FF0000\u300d\u306e\u3088\u3046\u306a6\u6841\u306e16\u9032\u6570\u3067\u8272\u3092\u8868\u3059\u65b9\u6cd5\u3067\u3059\u3002RR\uff08\u8d64\uff09\u30fbGG\uff08\u7dd1\uff09\u30fbBB\uff08\u9752\uff09\u306e\u54042\u6841\u3067255\u6bb5\u968e\uff0800\u301cFF\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002#000000\u304c\u9ed2\u3001#FFFFFF\u304c\u767d\u3001#FF0000\u304c\u8d64\u3001#0000FF\u304c\u9752\u3067\u3059\u3002CSS\u3067\u300ccolor: #FF0000;\u300d\u300ccolor: #333;\uff08\u7701\u7565\u5f62\uff09\u300d\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"font face\u3068CSS font-family\u306e\u9055\u3044\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u4e21\u65b9\u3068\u3082\u30d5\u30a9\u30f3\u30c8\u306e\u7a2e\u985e\u3092\u6307\u5b9a\u3057\u307e\u3059\u304c\u3001font\u30bf\u30b0\u306eface\u5c5e\u6027\u306fHTML5\u3067\u5ec3\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u73fe\u4ee3\u3067\u306fCSS\u306efont-family\u3092\u4f7f\u3044\u307e\u3059\u3002\u300cfont-family: Arial, sans-serif;\u300d\u306e\u3088\u3046\u306b\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b\u306e\u304c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002Web\u30d5\u30a9\u30f3\u30c8\uff08Google Fonts\u7b49\uff09\u3082CSS\u306efont-family\u3067\u9069\u7528\u3057\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"CSS color\u30d7\u30ed\u30d1\u30c6\u30a3\u3068font color\u306e\u9055\u3044\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u6a5f\u80fd\u306f\u540c\u3058\uff08\u6587\u5b57\u306e\u8272\u3092\u5909\u3048\u308b\uff09\u3067\u3059\u304c\u3001font\u30bf\u30b0\u306ecolor\u5c5e\u6027\u306fHTML5\u3067\u5ec3\u6b62\u3055\u308c\u3066\u3044\u307e\u3059\u3002CSS color\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u73fe\u4ee3\u306e\u6b63\u3057\u3044\u65b9\u6cd5\u3067\u3059\u3002CSS\u306e\u5834\u5408\u3001\u5916\u90e8CSS\u30d5\u30a1\u30a4\u30eb\u3067\u4e00\u5143\u7ba1\u7406\u3067\u304d\u308b\u305f\u3081\u300c\u5f8c\u304b\u3089\u4e00\u62ec\u5909\u66f4\u304c\u7c21\u5358\u300d\u3068\u3044\u3046\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Claude Code\u3067HTML\u306efont\u30bf\u30b0\u3092CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u3082\u3089\u3048\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u3067\u304d\u307e\u3059\u3002font\u30bf\u30b0\u304c\u542b\u307e\u308c\u308bHTML\u3092Claude Code\u306b\u8cbc\u308a\u4ed8\u3051\u3066\u300cfont\u30bf\u30b0\u3092\u5168\u3066CSS\u306b\u66f8\u304d\u63db\u3048\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u8272\u30fb\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30f3\u30c8\u7a2e\u985e\u3092\u9069\u5207\u306aCSS\u306b\u5909\u63db\u3057\u3001\u7e70\u308a\u8fd4\u3057\u4f7f\u308f\u308c\u308b\u30b9\u30bf\u30a4\u30eb\u306f\u30af\u30e9\u30b9\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u5927\u91cf\u306efont\u30bf\u30b0\u304c\u6b8b\u308b\u53e4\u3044\u30b5\u30a4\u30c8\u306e\u30ea\u30cb\u30e5\u30fc\u30a2\u30eb\u306b\u7279\u306b\u6709\u52b9\u3067\u3059\u3002\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9 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