{"id":333,"date":"2025-06-25T17:47:55","date_gmt":"2025-06-25T08:47:55","guid":{"rendered":"https:\/\/www.andco.group\/blog\/?p=333"},"modified":"2025-06-25T17:47:57","modified_gmt":"2025-06-25T08:47:57","slug":"responsive-design-css","status":"publish","type":"post","link":"https:\/\/www.andco.group\/blog\/responsive-design-css\/","title":{"rendered":"\u3010\u521d\u5fc3\u8005\u5411\u3051\u3011\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 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CSS\u306e\u57fa\u672c\u6982\u5ff5\u304b\u3089\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b\u307e\u3067\u3001\u521d\u5fc3\u8005\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002viewport\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3001\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u306e\u66f8\u304d\u65b9\u3001\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3069\u3093\u306a\u30c7\u30d0\u30a4\u30b9\u3067\u3082\u5feb\u9069\u306b\u95b2\u89a7\u3067\u304d\u308bWeb\u30b5\u30a4\u30c8\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u3068\u306f\uff1f\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3088\u3046<\/h2>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u3068\u306f\u3001\u753b\u9762\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066Web\u30da\u30fc\u30b8\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u3084\u30c7\u30b6\u30a4\u30f3\u3092\u81ea\u52d5\u7684\u306b\u8abf\u6574\u3059\u308bCSS\u6280\u8853\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5f93\u6765\u306eWeb\u30b5\u30a4\u30c8\u306fPC\u5411\u3051\u306e\u56fa\u5b9a\u5e45\u30c7\u30b6\u30a4\u30f3\u304c\u4e3b\u6d41\u3067\u3057\u305f\u304c\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306e\u666e\u53ca\u306b\u3088\u308a\u3001\u4e00\u3064\u306e\u30b5\u30a4\u30c8\u3067\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u751f\u307e\u308c\u307e\u3057\u305f\u3002\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u3067\u306f3\u30ab\u30e9\u30e0\u3001\u30bf\u30d6\u30ec\u30c3\u30c8\u3067\u306f2\u30ab\u30e9\u30e0\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f1\u30ab\u30e9\u30e0\u3068\u3044\u3063\u305f\u5177\u5408\u306b\u3001\u753b\u9762\u30b5\u30a4\u30ba\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u306e\u91cd\u8981\u6027\u306f\u5e74\u3005\u9ad8\u307e\u3063\u3066\u304a\u308a\u3001Google\u3082\u691c\u7d22\u30e9\u30f3\u30ad\u30f3\u30b0\u306e\u8981\u56e0\u3068\u3057\u3066\u300c\u30e2\u30d0\u30a4\u30eb\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u300d\u3092\u91cd\u8996\u3057\u3066\u3044\u307e\u3059\u3002\u73fe\u5728\u3001Web\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u904e\u534a\u6570\u304c\u30e2\u30d0\u30a4\u30eb\u7aef\u672b\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3068\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306f\u5fc5\u9808\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u306e\u4e3b\u306a\u7279\u5fb4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5358\u4e00\u306eHTML\u30d5\u30a1\u30a4\u30eb<\/strong>\uff1a\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306b\u5225\u3005\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044<\/li>\n\n\n\n<li><strong>\u67d4\u8edf\u306a\u30ec\u30a4\u30a2\u30a6\u30c8<\/strong>\uff1a\u753b\u9762\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u8981\u7d20\u304c\u4f38\u7e2e\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u5bb9\u6613<\/strong>\uff1a\u4e00\u3064\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u66f4\u65b0\u3059\u308b\u3060\u3051\u3067\u5168\u30c7\u30d0\u30a4\u30b9\u306b\u53cd\u6620<\/li>\n\n\n\n<li><strong>SEO\u52b9\u679c<\/strong>\uff1aGoogle\u304c\u63a8\u5968\u3059\u308b\u30e2\u30d0\u30a4\u30eb\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u5bfe\u5fdc<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u306e\u57fa\u672c\u8a2d\u5b9a\uff1aviewport\u306e\u91cd\u8981\u6027<\/h2>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30b5\u30a4\u30c8\u3092\u4f5c\u6210\u3059\u308b\u969b\u3001\u6700\u521d\u306b\u8a2d\u5b9a\u3059\u3079\u304d\u306a\u306e\u304cviewport\uff08\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\uff09\u3067\u3059\u3002viewport\u3068\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u304cWeb\u30da\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b\u969b\u306e\u8868\u793a\u9818\u57df\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30e2\u30d0\u30a4\u30eb\u30d6\u30e9\u30a6\u30b6\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30b5\u30a4\u30c8\u3067\u3082\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067980px\u7a0b\u5ea6\u306e\u4eee\u60f3\u7684\u306a\u5e45\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3067\u306f\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">viewport\u8a2d\u5b9a\u306e\u57fa\u672c\u30b3\u30fc\u30c9<\/h3>\n\n\n\n<p>HTML\u306e<code>&lt;head><\/code>\u30bf\u30b0\u5185\u306b\u4ee5\u4e0b\u306emeta\u30bf\u30b0\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"&gt;<\/code><\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306e\u5404\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u610f\u5473<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30e9\u30e1\u30fc\u30bf<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>width=device-width<\/td><td>\u8868\u793a\u5e45\u3092\u30c7\u30d0\u30a4\u30b9\u306e\u753b\u9762\u5e45\u306b\u5408\u308f\u305b\u308b<\/td><\/tr><tr><td>initial-scale=1.0<\/td><td>\u521d\u671f\u8868\u793a\u500d\u7387\u3092100%\u306b\u8a2d\u5b9a<\/td><\/tr><tr><td>maximum-scale=3.0<\/td><td>\u6700\u5927\u62e1\u5927\u500d\u7387\u3092300%\u306b\u5236\u9650\uff08\u4efb\u610f\uff09<\/td><\/tr><tr><td>user-scalable=yes<\/td><td>\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u308b\u62e1\u5927\u7e2e\u5c0f\u3092\u8a31\u53ef\uff08\u4efb\u610f\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">viewport\u8a2d\u5b9a\u6642\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>user-scalable=no<\/code>\u306f\u57fa\u672c\u7684\u306b\u907f\u3051\u308b\uff08\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u306e\u89b3\u70b9\u304b\u3089\uff09<\/li>\n\n\n\n<li><code>maximum-scale<\/code>\u306f\u904e\u5ea6\u306b\u5236\u9650\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u5fc5\u305aHTML\u306e<code>&lt;head><\/code>\u30bf\u30b0\u5185\u306e\u4e0a\u90e8\u306b\u8a18\u8ff0\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u306e\u6838\u5fc3\uff1a\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u306e\u66f8\u304d\u65b9<\/h2>\n\n\n\n<p>\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u306e\u6700\u3082\u91cd\u8981\u306a\u6a5f\u80fd\u3067\u3059\u3002\u7279\u5b9a\u306e\u6761\u4ef6\uff08\u753b\u9762\u5e45\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u5411\u304d\u306a\u3069\uff09\u306b\u5fdc\u3058\u3066\u3001\u7570\u306a\u308bCSS\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u306e\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@media screen and (max-width: 768px) {\n  \/* 768px\u4ee5\u4e0b\u306e\u753b\u9762\u3067\u9069\u7528\u3055\u308c\u308bCSS *\/\n  .container {\n    width: 100%;\n    padding: 10px;\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u8981\u306a\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u8a2d\u5b9a<\/h3>\n\n\n\n<p>\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\uff08\u753b\u9762\u30b5\u30a4\u30ba\u306e\u5883\u754c\u7dda\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\uff08320px\uff5e767px\uff09 *\/\n@media screen and (max-width: 767px) {\n  \/* \u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u7528\u306eCSS *\/\n}\n\n\/* \u30bf\u30d6\u30ec\u30c3\u30c8\uff08768px\uff5e1023px\uff09 *\/\n@media screen and (min-width: 768px) and (max-width: 1023px) {\n  \/* \u30bf\u30d6\u30ec\u30c3\u30c8\u7528\u306eCSS *\/\n}\n\n\/* \u30c7\u30b9\u30af\u30c8\u30c3\u30d7\uff081024px\u4ee5\u4e0a\uff09 *\/\n@media screen and (min-width: 1024px) {\n  \/* \u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u7528\u306eCSS *\/\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">min-width\u3068max-width\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6307\u5b9a\u65b9\u6cd5<\/th><th>\u610f\u5473<\/th><th>\u9069\u7528\u7bc4\u56f2<\/th><\/tr><\/thead><tbody><tr><td>min-width: 768px<\/td><td>768px\u4ee5\u4e0a<\/td><td>\u30bf\u30d6\u30ec\u30c3\u30c8\u30fbPC<\/td><\/tr><tr><td>max-width: 767px<\/td><td>767px\u4ee5\u4e0b<\/td><td>\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3<\/td><\/tr><tr><td>min-width: 768px and max-width: 1023px<\/td><td>768px\uff5e1023px<\/td><td>\u30bf\u30d6\u30ec\u30c3\u30c8\u306e\u307f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u30ec\u30a4\u30a2\u30a6\u30c8\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u5b9f\u8df5\u7684\u306a\u624b\u6cd5<\/h2>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u5177\u4f53\u7684\u306aCSS\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u30b0\u30ea\u30c3\u30c9\u306e\u4f5c\u6210<\/h3>\n\n\n\n<p>\u5f93\u6765\u306e\u56fa\u5b9a\u5e45\u3067\u306f\u306a\u304f\u3001\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.container {\n  width: 90%;\n  max-width: 1200px;\n  margin: 0 auto;\n}\n\n.column {\n  width: 48%;\n  float: left;\n  margin-right: 4%;\n}\n\n.column:last-child {\n  margin-right: 0;\n}\n\n\/* \u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f1\u30ab\u30e9\u30e0\u306b *\/\n@media screen and (max-width: 767px) {\n  .column {\n    width: 100%;\n    float: none;\n    margin-right: 0;\n    margin-bottom: 20px;\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Flexbox\u3092\u6d3b\u7528\u3057\u305f\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30ec\u30a4\u30a2\u30a6\u30c8<\/h3>\n\n\n\n<p>\u3088\u308a\u73fe\u4ee3\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3068\u3057\u3066\u3001Flexbox\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.flex-container {\n  display: flex;\n  flex-wrap: wrap;\n  gap: 20px;\n}\n\n.flex-item {\n  flex: 1 1 300px; \/* \u6700\u5c0f\u5e45300px\u3001\u53ef\u5909 *\/\n  background: #f0f0f0;\n  padding: 20px;\n}\n\n@media screen and (max-width: 767px) {\n  .flex-item {\n    flex: 1 1 100%; \/* \u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f100%\u5e45 *\/\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30bf\u30a4\u30dd\u30b0\u30e9\u30d5\u30a3<\/h3>\n\n\n\n<p>\u6587\u5b57\u30b5\u30a4\u30ba\u3082\u753b\u9762\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>body {\n  font-size: 16px;\n  line-height: 1.6;\n}\n\nh1 {\n  font-size: 2.5em;\n}\n\nh2 {\n  font-size: 2em;\n}\n\n@media screen and (max-width: 767px) {\n  body {\n    font-size: 14px;\n  }\n\n  h1 {\n    font-size: 2em;\n  }\n\n  h2 {\n    font-size: 1.5em;\n  }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u753b\u50cf\u6700\u9069\u5316\uff1a\u52b9\u7387\u7684\u306a\u8868\u793a\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u753b\u50cf\u306e\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306f\u3001\u8868\u793a\u901f\u5ea6\u3068\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306b\u76f4\u7d50\u3059\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u672c\u7684\u306a\u753b\u50cf\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5316<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>img {\n  max-width: 100%;\n  height: auto;\n}<\/code><\/pre>\n\n\n\n<p>\u3053\u306e\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u753b\u50cf\u304c\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u306f\u307f\u51fa\u3059\u3053\u3068\u306a\u304f\u3001\u753b\u9762\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u7e2e\u5c0f\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30d0\u30a4\u30b9\u5225\u753b\u50cf\u5207\u308a\u66ff\u3048<\/h3>\n\n\n\n<p>HTML5\u306e<code>&lt;picture><\/code>\u8981\u7d20\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u306b\u6700\u9069\u306a\u753b\u50cf\u3092\u914d\u4fe1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;picture&gt;\n  &lt;source media=\"(max-width: 767px)\" srcset=\"image-mobile.jpg\"&gt;\n  &lt;source media=\"(min-width: 768px)\" srcset=\"image-desktop.jpg\"&gt;\n  &lt;img src=\"image-desktop.jpg\" alt=\"\u8aac\u660e\u6587\"&gt;\n&lt;\/picture&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">CSS\u80cc\u666f\u753b\u50cf\u306e\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>.hero-image {\n  background-image: url('hero-desktop.jpg');\n  background-size: cover;\n  background-position: center;\n  height: 400px;\n}\n\n@media screen and (max-width: 767px) {\n  .hero-image {\n    background-image: url('hero-mobile.jpg');\n    height: 250px;\n  }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u30c6\u30b9\u30c8\u65b9\u6cd5\uff1a\u78ba\u8a8d\u3068\u30c7\u30d0\u30c3\u30b0<\/h2>\n\n\n\n<p>\u4f5c\u6210\u3057\u305f\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30b5\u30a4\u30c8\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d6\u30e9\u30a6\u30b6\u958b\u767a\u8005\u30c4\u30fc\u30eb\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u8868\u793a\u3092\u30c6\u30b9\u30c8<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Chrome<\/strong>: F12 \u2192 \u30c7\u30d0\u30a4\u30b9\u30c4\u30fc\u30eb\u30d0\u30fc\u30a2\u30a4\u30b3\u30f3\u3092\u30af\u30ea\u30c3\u30af<\/li>\n\n\n\n<li><strong>Firefox<\/strong>: F12 \u2192 \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u30e2\u30fc\u30c9<\/li>\n\n\n\n<li><strong>Safari<\/strong>: option + command + I \u2192 \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u30e2\u30fc\u30c9<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c6\u30b9\u30c8\u3059\u3079\u304d\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u753b\u9762\u30b5\u30a4\u30ba\u3067\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30c7\u30d0\u30a4\u30b9<\/th><th>\u753b\u9762\u5e45<\/th><th>\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3<\/td><td>320px\uff5e767px<\/td><td>1\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u3001\u30bf\u30c3\u30c1\u64cd\u4f5c<\/td><\/tr><tr><td>\u30bf\u30d6\u30ec\u30c3\u30c8<\/td><td>768px\uff5e1023px<\/td><td>2\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u3001\u4e2d\u9593\u30b5\u30a4\u30ba<\/td><\/tr><tr><td>\u30c7\u30b9\u30af\u30c8\u30c3\u30d7<\/td><td>1024px\u4ee5\u4e0a<\/td><td>3\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u3001\u6700\u5927\u5e45\u5236\u9650<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u554f\u984c\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u767a\u751f<\/strong>: <code>overflow-x: hidden<\/code>\u3084\u5e45\u306e\u898b\u76f4\u3057<\/li>\n\n\n\n<li><strong>\u753b\u50cf\u304c\u306f\u307f\u51fa\u3059<\/strong>: <code>max-width: 100%<\/code>\u306e\u8a2d\u5b9a\u78ba\u8a8d<\/li>\n\n\n\n<li><strong>\u6587\u5b57\u304c\u5c0f\u3055\u3059\u304e\u308b<\/strong>: \u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u306e\u8abf\u6574<\/li>\n\n\n\n<li><strong>\u30bf\u30c3\u30c1\u64cd\u4f5c\u304c\u56f0\u96e3<\/strong>: \u30dc\u30bf\u30f3\u30b5\u30a4\u30ba\u309244px\u4ee5\u4e0a\u306b\u8a2d\u5b9a<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u3055\u3089\u306a\u308b\u6700\u9069\u5316<\/h2>\n\n\n\n<p>\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u4f7f\u3044\u3084\u3059\u3055\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30e1\u30cb\u30e5\u30fc\u306e\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5316<\/h3>\n\n\n\n<p>\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f\u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30e1\u30cb\u30e5\u30fc\u306b\u5909\u66f4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.nav-menu {\n  display: flex;\n  list-style: none;\n}\n\n.nav-toggle {\n  display: none;\n}\n\n@media screen and (max-width: 767px) {\n  .nav-menu {\n    display: none;\n    flex-direction: column;\n    position: absolute;\n    top: 100%;\n    left: 0;\n    width: 100%;\n    background: #fff;\n  }\n\n  .nav-menu.active {\n    display: flex;\n  }\n\n  .nav-toggle {\n    display: block;\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30a9\u30fc\u30e0\u306e\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u6700\u9069\u5316<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>.form-group {\n  margin-bottom: 15px;\n}\n\n.form-control {\n  width: 100%;\n  padding: 10px;\n  border: 1px solid #ddd;\n  border-radius: 4px;\n}\n\n@media screen and (min-width: 768px) {\n  .form-row {\n    display: flex;\n    gap: 15px;\n  }\n\n  .form-row .form-group {\n    flex: 1;\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/* \u30af\u30ea\u30c6\u30a3\u30ab\u30ebCSS\u306e\u512a\u5148\u8aad\u307f\u8fbc\u307f *\/\n.above-fold {\n  \/* \u521d\u671f\u8868\u793a\u306b\u5fc5\u8981\u306a\u6700\u5c0f\u9650\u306eCSS *\/\n}\n\n\/* \u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u53ef\u80fd\u306aCSS *\/\n@media screen and (min-width: 768px) {\n  .below-fold {\n    \/* \u30bf\u30d6\u30ec\u30c3\u30c8\u4ee5\u4e0a\u3067\u306e\u307f\u5fc5\u8981\u306aCSS *\/\n  }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 CSS\u306f\u3001\u73fe\u4ee3\u306eWeb\u5236\u4f5c\u306b\u304a\u3044\u3066\u6b20\u304b\u305b\u306a\u3044\u6280\u8853\u3067\u3059\u3002viewport\u8a2d\u5b9a\u304b\u3089\u59cb\u307e\u308a\u3001\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u3001\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u8a2d\u8a08\u307e\u3067\u3001\u6bb5\u968e\u7684\u306b\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u3069\u3093\u306a\u30c7\u30d0\u30a4\u30b9\u3067\u3082\u7f8e\u3057\u304f\u6a5f\u80fd\u3059\u308bWeb\u30b5\u30a4\u30c8\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/p>\n\n\n\n<ul 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