{"id":20056,"date":"2026-08-26T00:00:00","date_gmt":"2026-08-26T00:00:00","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=20056"},"modified":"2026-08-23T15:29:41","modified_gmt":"2026-08-23T15:29:41","slug":"css-timeline","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css-timeline\/","title":{"rendered":"CSS\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u4f5c\u308a\u65b9\uff5c\u6cbf\u9769\u30fb\u30b9\u30c6\u30c3\u30d7\u3092\u898b\u305b\u308b\u30b3\u30d4\u30da\u96c6"},"content":{"rendered":"<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-left\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.40.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\"><p><strong>\u4f1a\u793e\u306e\u6cbf\u9769\u30da\u30fc\u30b8\u3092\u4f5c\u308b\u3093\u3067\u3059\u304c\u3001\u7e26\u7dda\u3068\u4e38\u3067\u6d41\u308c\u3092\u898b\u305b\u308b\u3084\u3064\u306f\u3069\u3046\u4f5c\u308b\u3093\u3067\u3059\u304b\uff1f<\/strong><\/p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-right\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\"><p><strong>\u3042\u308c\u306f<strong>\u64ec\u4f3c\u8981\u7d20\u3067\u7dda\u3068\u4e38\u3092\u63cf\u304f<\/strong>\u3060\u3051\u3060\u3088\u3002\u4ed5\u7d44\u307f\u304c\u5206\u304b\u308c\u3070\u3001\u7e26\u30fb\u6a2a\u30fb\u4ea4\u4e92\u914d\u7f6e\u305c\u3093\u3076\u540c\u3058\u8003\u3048\u65b9\u3067\u4f5c\u308c\u308b\u3002\u9806\u756a\u306b\u898b\u3066\u3044\u3053\u3046\u3002<\/strong><\/p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">\u4f1a\u793e\u306e\u6cbf\u9769\u3001\u5236\u4f5c\u306e\u6d41\u308c\u3001\u5b66\u7fd2\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3002\u6642\u9593\u3084\u9806\u5e8f\u306e\u3042\u308b\u60c5\u5831\u306f\u3001\u7b87\u6761\u66f8\u304d\u3088\u308a<span class=\"swl-marker mark_yellow\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u5f62\u5f0f<\/span>\u306e\u307b\u3046\u304c\u5727\u5012\u7684\u306b\u4f1d\u308f\u308a\u307e\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5b9f\u88c5\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u7e26\u7dda\u30921\u672c\u5f15\u304d\u3001\u5404\u9805\u76ee\u306b\u4e38\u5370\u3092\u7f6e\u304f\u3002\u3053\u306e2\u3064\u3092\u64ec\u4f3c\u8981\u7d20\u3067\u63cf\u3051\u3070\u5b8c\u6210\u3057\u307e\u3059\u3002\u753b\u50cf\u3082\u30e9\u30a4\u30d6\u30e9\u30ea\u3082\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u57fa\u672c\u306e\u7e26\u578b\u304b\u3089\u3001\u5de6\u53f3\u4ea4\u4e92\u306e\u914d\u7f6e\u3001\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u7dda\u304c\u4f38\u3073\u308b\u6f14\u51fa\u307e\u3067\u3001\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u5f62\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u57fa\u672c\u69cb\u9020\u3068\u8003\u3048\u65b9<\/li>\n<li>\u7e26\u578b\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\uff08\u6700\u3082\u4f7f\u3046\u57fa\u672c\u5f62\uff09<\/li>\n<li>\u65e5\u4ed8\u3092\u5de6\u306b\u7f6e\u304f2\u30ab\u30e9\u30e0\u578b<\/li>\n<li>\u5de6\u53f3\u4ea4\u4e92\u306b\u914d\u7f6e\u3059\u308b\u30b8\u30b0\u30b6\u30b0\u578b<\/li>\n<li>\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7\uff08\u7533\u8fbc\u307f\u306e\u6d41\u308c\u306a\u3069\uff09<\/li>\n<li>\u30a2\u30a4\u30b3\u30f3\u30fb\u756a\u53f7\u3092\u4e38\u306e\u4e2d\u306b\u5165\u308c\u308b<\/li>\n<li>\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u7dda\u304c\u4f38\u3073\u308b\u6f14\u51fa<\/li>\n<li>\u30b9\u30de\u30db\u5bfe\u5fdc\u3068\u5207\u308a\u66ff\u3048\u306e\u8003\u3048\u65b9<\/li>\n<li>\u5d29\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6<\/li>\n<li>\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u5b8c\u6210\u7248<\/li>\n<\/ul>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u57fa\u672c\u69cb\u9020\u3068\u8003\u3048\u65b9<\/h2>\n\n<figure class=\"wp-block-image size-large\" data-dia=\"20056-1\"><img decoding=\"async\" width=\"1568\" height=\"414\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-1.png\" alt=\"\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e3\u8981\u7d20\" class=\"wp-image-20057\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-1.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-1-768x203.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-1-1536x406.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u898b\u305f\u76ee\u306f\u8907\u96d1\u3067\u3059\u304c\u3001\u5206\u89e3\u3059\u308b\u3068\u8981\u7d20\u306f3\u3064\u3060\u3051\u3067\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7e26\u7dda<\/strong>\uff1a\u9805\u76ee\u5168\u4f53\u3092\u8cab\u304f1\u672c\u306e\u7dda\uff08\u89aa\u8981\u7d20\u306e<code>::before<\/code>\u3067\u63cf\u304f\uff09<\/li>\n<li><strong>\u4e38\u5370<\/strong>\uff1a\u5404\u9805\u76ee\u306e\u4f4d\u7f6e\u3092\u793a\u3059\u30de\u30fc\u30ab\u30fc\uff08\u5404\u9805\u76ee\u306e<code>::before<\/code>\uff09<\/li>\n<li><strong>\u5185\u5bb9<\/strong>\uff1a\u65e5\u4ed8\u3068\u672c\u6587\uff08\u901a\u5e38\u306eHTML\uff09<\/li>\n<\/ul>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;ol class=\"timeline\"&gt;\n  &lt;li class=\"timeline__item\"&gt;\n    &lt;time class=\"timeline__date\"&gt;2020\u5e744\u6708&lt;\/time&gt;\n    &lt;h3 class=\"timeline__title\"&gt;\u4f1a\u793e\u8a2d\u7acb&lt;\/h3&gt;\n    &lt;p class=\"timeline__text\"&gt;Web\u5236\u4f5c\u4e8b\u696d\u3092\u958b\u59cb\u3057\u307e\u3057\u305f\u3002&lt;\/p&gt;\n  &lt;\/li&gt;\n  &lt;li class=\"timeline__item\"&gt;\n    &lt;time class=\"timeline__date\"&gt;2022\u5e7410\u6708&lt;\/time&gt;\n    &lt;h3 class=\"timeline__title\"&gt;\u30aa\u30d5\u30a3\u30b9\u79fb\u8ee2&lt;\/h3&gt;\n    &lt;p class=\"timeline__text\"&gt;\u30e1\u30f3\u30d0\u30fc\u5897\u54e1\u306b\u3068\u3082\u306a\u3044\u79fb\u8ee2\u3057\u307e\u3057\u305f\u3002&lt;\/p&gt;\n  &lt;\/li&gt;\n&lt;\/ol&gt;<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u306f<span class=\"swl-marker mark_yellow\"><code>ol<\/code>\uff08\u9806\u5e8f\u4ed8\u304d\u30ea\u30b9\u30c8\uff09<\/span>\u304c\u9069\u5207\u3067\u3059\u3002\u6642\u7cfb\u5217\u3068\u3044\u3046\u9806\u5e8f\u306b\u610f\u5473\u304c\u3042\u308b\u305f\u3081\u3001\u652f\u63f4\u6280\u8853\u306b\u3082\u69cb\u9020\u304c\u6b63\u3057\u304f\u4f1d\u308f\u308a\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u7e26\u578b\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\uff08\u57fa\u672c\u5f62\uff09<\/h2>\n\n<figure class=\"wp-block-image size-large\" data-dia=\"20056-2\"><img decoding=\"async\" width=\"1568\" height=\"731\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-2.png\" alt=\"\u7e26\u578b\u3092\u4f5c\u308b\u624b\u9806\" class=\"wp-image-20058\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-2.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-2-768x358.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-2-1536x716.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u3088\u304f\u4f7f\u3046\u5f62\u3067\u3059\u3002\u5de6\u306b\u7dda\u3068\u4e38\u3001\u53f3\u306b\u5185\u5bb9\u3092\u7f6e\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline {\n  position: relative;\n  list-style: none;\n  margin: 0;\n  padding: 0 0 0 32px;      \/* \u7dda\u306e\u3076\u3093\u3060\u3051\u5185\u5bb9\u3092\u53f3\u3078\u5bc4\u305b\u308b *\/\n}\n\n\/* \u7e26\u7dda *\/\n.timeline::before {\n  content: \"\";\n  position: absolute;\n  top: 8px;\n  bottom: 8px;\n  left: 7px;\n  width: 2px;\n  background-color: #e5e7eb;\n}\n\n.timeline__item {\n  position: relative;\n  padding-bottom: 32px;     \/* \u9805\u76ee\u540c\u58eb\u306e\u9593\u9694 *\/\n}\n\n\/* \u4e38\u5370 *\/\n.timeline__item::before {\n  content: \"\";\n  position: absolute;\n  top: 6px;\n  left: -32px;\n  width: 16px;\n  height: 16px;\n  border-radius: 50%;\n  background-color: #10b981;\n  border: 3px solid #fff;\n  box-shadow: 0 0 0 2px #10b981;\n}\n\n.timeline__date {\n  display: block;\n  margin-bottom: 4px;\n  color: #10b981;\n  font-weight: 700;\n  font-size: 0.9em;\n}\n\n.timeline__item:last-child {\n  padding-bottom: 0;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u7dda\u3092\u89aa\u306e<code>::before<\/code>\u3067\u63cf\u304f\u3068\u3001\u9805\u76ee\u6570\u304c\u5909\u308f\u3063\u3066\u3082\u9577\u3055\u304c\u81ea\u52d5\u3067\u5408\u3044\u307e\u3059\u3002<code>top<\/code>\u3068<code>bottom<\/code>\u3092\u5c11\u3057\u5185\u5074\u306b\u3059\u308b\u3068\u3001\u7aef\u306e\u4e38\u304b\u3089\u7dda\u304c\u306f\u307f\u51fa\u3057\u307e\u305b\u3093\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u65e5\u4ed8\u3092\u5de6\u306b\u7f6e\u304f2\u30ab\u30e9\u30e0\u578b<\/h2>\n\n<p class=\"wp-block-paragraph\">\u6cbf\u9769\u30da\u30fc\u30b8\u3067\u3088\u304f\u898b\u308b\u5f62\u3067\u3059\u3002\u65e5\u4ed8\u3092\u5de6\u30ab\u30e9\u30e0\u306b\u63c3\u3048\u308b\u3068\u3001\u5e74\u3054\u3068\u306e\u9593\u9694\u304c\u8aad\u307f\u53d6\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-two-col .timeline__item {\n  display: grid;\n  grid-template-columns: 110px 1fr;\n  gap: 0 28px;\n}\n\n.timeline.-two-col {\n  padding-left: 0;\n}\n\n.timeline.-two-col::before {\n  left: 130px;              \/* \u65e5\u4ed8\u30ab\u30e9\u30e0\u306e\u53f3\u7aef\u306b\u7dda\u3092\u7f6e\u304f *\/\n}\n\n.timeline.-two-col .timeline__item::before {\n  left: 123px;\n  top: 4px;\n}\n\n.timeline.-two-col .timeline__date {\n  text-align: right;\n  padding-top: 2px;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u65e5\u4ed8\u30ab\u30e9\u30e0\u306e\u5e45\u306f<span class=\"swl-marker mark_yellow\">\u5e74\u6708\u307e\u3067\u5165\u308b110px\u524d\u5f8c<\/span>\u304c\u76ee\u5b89\u3067\u3059\u3002\u6587\u5b57\u304c\u6298\u308a\u8fd4\u3059\u3068\u4e38\u306e\u4f4d\u7f6e\u3068\u305a\u308c\u308b\u305f\u3081\u3001<code>white-space: nowrap<\/code>\u3092\u8db3\u3057\u3066\u304a\u304f\u3068\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u5de6\u53f3\u4ea4\u4e92\u306b\u914d\u7f6e\u3059\u308b\u30b8\u30b0\u30b6\u30b0\u578b<\/h2>\n\n<p class=\"wp-block-paragraph\">\u9805\u76ee\u6570\u304c\u5c11\u306a\u3044\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30da\u30fc\u30b8\u306a\u3069\u3067\u6620\u3048\u308b\u5f62\u3067\u3059\u3002\u4e2d\u592e\u306b\u7dda\u3092\u5f15\u304d\u3001\u5947\u6570\u3068\u5076\u6570\u3067\u5de6\u53f3\u306b\u632f\u308a\u5206\u3051\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-alt {\n  padding: 0;\n}\n\n.timeline.-alt::before {\n  left: 50%;\n  transform: translateX(-50%);\n}\n\n.timeline.-alt .timeline__item {\n  width: 50%;\n  padding: 0 32px 40px 0;\n  text-align: right;\n}\n\n\/* \u5076\u6570\u756a\u76ee\u306f\u53f3\u5074\u3078 *\/\n.timeline.-alt .timeline__item:nth-child(even) {\n  margin-left: 50%;\n  padding: 0 0 40px 32px;\n  text-align: left;\n}\n\n.timeline.-alt .timeline__item::before {\n  left: auto;\n  right: -9px;\n}\n\n.timeline.-alt .timeline__item:nth-child(even)::before {\n  left: -9px;\n  right: auto;\n}\n\n\/* \u30b9\u30de\u30db\u3067\u306f\u7247\u5074\u306b\u5bc4\u305b\u308b *\/\n@media (max-width: 640px) {\n  .timeline.-alt::before {\n    left: 7px;\n    transform: none;\n  }\n  .timeline.-alt .timeline__item,\n  .timeline.-alt .timeline__item:nth-child(even) {\n    width: 100%;\n    margin-left: 0;\n    padding: 0 0 32px 32px;\n    text-align: left;\n  }\n  .timeline.-alt .timeline__item::before,\n  .timeline.-alt .timeline__item:nth-child(even)::before {\n    left: -1px;\n    right: auto;\n  }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u30b8\u30b0\u30b6\u30b0\u578b\u306f\u30b9\u30de\u30db\u3067\u5fc5\u305a\u5d29\u308c\u307e\u3059\u3002640px\u4ee5\u4e0b\u3067\u306f\u901a\u5e38\u306e\u7e26\u578b\u306b\u623b\u3059\u6307\u5b9a\u3092\u30bb\u30c3\u30c8\u3067\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7\uff08\u7533\u8fbc\u307f\u306e\u6d41\u308c\uff09<\/h2>\n\n<p class=\"wp-block-paragraph\">3\u301c5\u30b9\u30c6\u30c3\u30d7\u306e\u6d41\u308c\u3092\u898b\u305b\u308b\u306a\u3089\u6a2a\u578b\u304c\u5411\u304d\u307e\u3059\u3002Flexbox\u3067\u7b49\u5206\u3057\u3001\u9805\u76ee\u306e\u9593\u306b\u7dda\u3092\u6e21\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.steps {\n  display: flex;\n  list-style: none;\n  margin: 0;\n  padding: 0;\n  counter-reset: step;\n}\n\n.steps__item {\n  position: relative;\n  flex: 1;\n  padding: 0 12px;\n  text-align: center;\n}\n\n\/* \u9805\u76ee\u306e\u9593\u3092\u3064\u306a\u3050\u7dda *\/\n.steps__item:not(:last-child)::after {\n  content: \"\";\n  position: absolute;\n  top: 26px;\n  left: 50%;\n  width: 100%;\n  height: 2px;\n  background-color: #e5e7eb;\n  z-index: 0;\n}\n\n\/* \u756a\u53f7\u306e\u4e38 *\/\n.steps__item::before {\n  counter-increment: step;\n  content: counter(step);\n  position: relative;\n  z-index: 1;\n  display: grid;\n  place-items: center;\n  width: 52px;\n  height: 52px;\n  margin: 0 auto 12px;\n  border-radius: 50%;\n  background-color: #10b981;\n  color: #fff;\n  font-weight: 800;\n  font-size: 1.15em;\n}\n\n@media (max-width: 640px) {\n  .steps {\n    display: block;\n  }\n  .steps__item:not(:last-child)::after {\n    top: 52px;\n    left: 26px;\n    width: 2px;\n    height: 100%;\n  }\n  .steps__item {\n    display: grid;\n    grid-template-columns: 52px 1fr;\n    gap: 16px;\n    text-align: left;\n    padding-bottom: 24px;\n  }\n  .steps__item::before {\n    margin: 0;\n  }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u756a\u53f7\u306f<code>counter-increment<\/code>\u3067\u81ea\u52d5\u63a1\u756a\u3059\u308b\u3068\u3001<span class=\"swl-marker mark_yellow\">\u9806\u756a\u3092\u5165\u308c\u66ff\u3048\u3066\u3082\u756a\u53f7\u304c\u5d29\u308c\u307e\u305b\u3093<\/span>\u3002HTML\u306b\u6570\u5b57\u3092\u66f8\u304b\u306a\u3044\u8a2d\u8a08\u306b\u3057\u3066\u304a\u304f\u3068\u904b\u7528\u304c\u697d\u3067\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30a2\u30a4\u30b3\u30f3\u30fb\u756a\u53f7\u3092\u4e38\u306e\u4e2d\u306b\u5165\u308c\u308b<\/h2>\n\n<p class=\"wp-block-paragraph\">\u4e38\u306e\u4e2d\u306b\u5e74\u53f7\u3084\u30a2\u30a4\u30b3\u30f3\u3092\u5165\u308c\u308b\u3068\u3001\u60c5\u5831\u91cf\u3092\u5897\u3084\u305b\u307e\u3059\u3002\u64ec\u4f3c\u8981\u7d20\u3067\u306f\u306a\u304f\u5b9f\u4f53\u306e\u8981\u7d20\u3067\u4f5c\u308b\u306e\u304c\u30b3\u30c4\u3067\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;li class=\"timeline__item\"&gt;\n  &lt;span class=\"timeline__mark\"&gt;01&lt;\/span&gt;\n  &lt;div class=\"timeline__body\"&gt;\n    &lt;time class=\"timeline__date\"&gt;2024\u5e74&lt;\/time&gt;\n    &lt;h3 class=\"timeline__title\"&gt;\u30b5\u30fc\u30d3\u30b9\u958b\u59cb&lt;\/h3&gt;\n  &lt;\/div&gt;\n&lt;\/li&gt;<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-mark .timeline__item {\n  display: grid;\n  grid-template-columns: 48px 1fr;\n  gap: 20px;\n  padding-bottom: 28px;\n}\n\n.timeline.-mark .timeline__item::before {\n  display: none;              \/* \u64ec\u4f3c\u8981\u7d20\u306e\u4e38\u306f\u4f7f\u308f\u306a\u3044 *\/\n}\n\n.timeline__mark {\n  display: grid;\n  place-items: center;\n  width: 48px;\n  height: 48px;\n  border-radius: 50%;\n  background-color: #e7f8f1;\n  color: #0f9d6f;\n  font-weight: 800;\n  border: 2px solid #10b981;\n}\n\n.timeline.-mark::before {\n  left: 23px;                 \/* \u4e38\u306e\u4e2d\u5fc3\u306b\u7dda\u3092\u901a\u3059 *\/\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u4e38\u3092\u5b9f\u4f53\u306b\u3059\u308b\u3068\u3001\u4e2d\u306bSVG\u30a2\u30a4\u30b3\u30f3\u3084\u753b\u50cf\u3082\u7f6e\u3051\u307e\u3059\u3002\u7dda\u306e\u4f4d\u7f6e\u306f\u4e38\u306e\u5e45\u306e\u534a\u5206\u306b\u5408\u308f\u305b\u308b\u3068\u4e2d\u5fc3\u3092\u901a\u308a\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u7dda\u304c\u4f38\u3073\u308b\u6f14\u51fa<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u5408\u308f\u305b\u3066\u7dda\u304c\u4f38\u3073\u308b\u52d5\u304d\u306f\u3001\u6700\u65b0\u306eCSS\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u5bfe\u5fdc\u74b0\u5883\u3067\u306fJavaScript\u304c\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>@supports (animation-timeline: view()) {\n  .timeline::after {\n    content: \"\";\n    position: absolute;\n    top: 8px;\n    left: 7px;\n    width: 2px;\n    background-color: #10b981;\n    height: 100%;\n    transform-origin: top;\n    animation: line-grow linear both;\n    animation-timeline: view();\n    animation-range: entry 20% cover 60%;\n  }\n}\n\n@keyframes line-grow {\n  from { transform: scaleY(0); }\n  to   { transform: scaleY(1); }\n}\n\n@media (prefers-reduced-motion: reduce) {\n  .timeline::after {\n    animation: none;\n    transform: scaleY(1);\n  }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><code>@supports<\/code>\u3067\u56f2\u3093\u3067\u304a\u3051\u3070\u3001<span class=\"swl-marker mark_yellow\">\u672a\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u4f55\u3082\u8d77\u304d\u306a\u3044<\/span>\u306e\u3067\u5b89\u5168\u3067\u3059\u3002\u6f14\u51fa\u304c\u7121\u304f\u3066\u3082\u5185\u5bb9\u306f\u8aad\u3081\u308b\u305f\u3081\u3001\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3068\u3057\u3066\u6210\u7acb\u3057\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30b9\u30de\u30db\u5bfe\u5fdc\u3068\u5207\u308a\u66ff\u3048\u306e\u8003\u3048\u65b9<\/h2>\n\n<figure class=\"wp-block-image size-large\" data-dia=\"20056-3\"><img decoding=\"async\" width=\"1568\" height=\"652\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-3.png\" alt=\"PC\u3068\u30b9\u30de\u30db\u306e\u51fa\u3057\u5206\u3051\" class=\"wp-image-20059\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-3.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-3-768x319.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-3-1536x639.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306f\u5e45\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3084\u3059\u3044\u30d1\u30fc\u30c4\u3067\u3059\u3002\u5207\u308a\u66ff\u3048\u65b9\u91dd\u3092\u6c7a\u3081\u3066\u304a\u304f\u3068\u5d29\u308c\u307e\u305b\u3093\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>PC\u8868\u793a<\/th><th>\u30b9\u30de\u30db\u3067\u306e\u63a8\u5968<\/th><th>\u7406\u7531<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u7e26\u578b\uff08\u57fa\u672c\uff09<\/td><td>\u305d\u306e\u307e\u307e<\/td><td>\u5e45\u306e\u5f71\u97ff\u3092\u53d7\u3051\u306b\u304f\u3044<\/td><\/tr>\n<tr><td>2\u30ab\u30e9\u30e0\u578b<\/td><td>\u65e5\u4ed8\u3092\u4e0a\u306b\u91cd\u306d\u308b<\/td><td>110px\u306e\u5217\u3067\u672c\u6587\u304c\u6f70\u308c\u308b<\/td><\/tr>\n<tr><td>\u30b8\u30b0\u30b6\u30b0\u578b<\/td><td>\u7247\u5074\u5bc4\u305b\u306b\u623b\u3059<\/td><td>\u534a\u5206\u306e\u5e45\u3067\u306f\u8aad\u3081\u306a\u3044<\/td><\/tr>\n<tr><td>\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7<\/td><td>\u7e26\u7a4d\u307f\u306b\u5909\u3048\u308b<\/td><td>4\u3064\u4ee5\u4e0a\u306f\u6a2a\u306b\u53ce\u307e\u3089\u306a\u3044<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u5171\u901a\u3059\u308b\u306e\u306f\u300c\u7dda\u306f\u5de6\u7aef\u306b\u5bc4\u305b\u3001\u5185\u5bb9\u306f\u5168\u5e45\u3067\u8aad\u307e\u305b\u308b\u300d\u3068\u3044\u3046\u5f62\u3067\u3059\u3002\u8ff7\u3063\u305f\u3089\u57fa\u672c\u306e\u7e26\u578b\u306b\u623b\u3059\u3001\u3068\u6c7a\u3081\u3066\u304a\u3051\u3070\u5b9f\u88c5\u304c\u5358\u7d14\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u5d29\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6<\/h2>\n\n<figure class=\"wp-block-image size-large\" data-dia=\"20056-4\"><img decoding=\"async\" width=\"1568\" height=\"669\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-4.png\" alt=\"\u5d29\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6\" class=\"wp-image-20060\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-4.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-4-768x328.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/08\/dia-20056-4-1536x655.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u3088\u304f\u3042\u308b\u3064\u307e\u305a\u304d\u3092\u307e\u3068\u3081\u307e\u3059\u3002\u4f4d\u7f6e\u304c\u305a\u308c\u308b\u7cfb\u306f\u3001\u307b\u307c\u57fa\u6e96\u8981\u7d20\u306e\u6307\u5b9a\u6f0f\u308c\u3067\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u75c7\u72b6<\/th><th>\u539f\u56e0<\/th><th>\u5bfe\u51e6<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u4e38\u306e\u4f4d\u7f6e\u304c\u305a\u308c\u308b<\/td><td>\u9805\u76ee\u306b<code>position: relative<\/code>\u304c\u306a\u3044<\/td><td>\u5404\u9805\u76ee\u306b\u6307\u5b9a\u3059\u308b<\/td><\/tr>\n<tr><td>\u7dda\u304c\u6700\u5f8c\u307e\u3067\u4f38\u3073\u308b<\/td><td>\u89aa\u306e\u9ad8\u3055\u3044\u3063\u3071\u3044\u306b\u63cf\u753b<\/td><td><code>bottom<\/code>\u3067\u5185\u5074\u306b\u53ce\u3081\u308b<\/td><\/tr>\n<tr><td>\u6700\u5f8c\u306e\u9805\u76ee\u306e\u4e0b\u306b\u4f59\u767d<\/td><td><code>padding-bottom<\/code>\u304c\u6b8b\u308b<\/td><td><code>:last-child<\/code>\u30670\u306b\u3059\u308b<\/td><\/tr>\n<tr><td>\u7dda\u3068\u4e38\u304c\u91cd\u306a\u3063\u3066\u898b\u3048\u308b<\/td><td>\u91cd\u306a\u308a\u9806\u304c\u540c\u3058<\/td><td>\u4e38\u306b<code>z-index<\/code>\u3092\u4ed8\u3051\u308b<\/td><\/tr>\n<tr><td>\u65e5\u4ed8\u304c\u6298\u308a\u8fd4\u3057\u3066\u5d29\u308c\u308b<\/td><td>\u5217\u5e45\u304c\u8db3\u308a\u306a\u3044<\/td><td><code>white-space: nowrap<\/code><\/td><\/tr>\n<tr><td>\u30b9\u30de\u30db\u3067\u5de6\u53f3\u304c\u306f\u307f\u51fa\u3059<\/td><td>\u30b8\u30b0\u30b6\u30b0\u306e\u307e\u307e<\/td><td>\u7e26\u578b\u306b\u623b\u3059\u6307\u5b9a\u3092\u8ffd\u52a0<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u6700\u521d\u306b\u78ba\u8a8d\u3059\u3079\u304d\u306f<span class=\"swl-marker mark_yellow\">\u9805\u76ee\u5074\u306e position: relative<\/span>\u3067\u3059\u3002\u3053\u308c\u304c\u7121\u3044\u3068\u3001\u4e38\u5370\u306f\u9805\u76ee\u3067\u306f\u306a\u304f\u30da\u30fc\u30b8\u5168\u4f53\u3092\u57fa\u6e96\u306b\u914d\u7f6e\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u5b8c\u6210\u7248<\/h2>\n\n<p class=\"wp-block-paragraph\">\u7e26\u578b\u30fb2\u30ab\u30e9\u30e0\u30fb\u30b8\u30b0\u30b6\u30b0\u3092\u30af\u30e9\u30b9\u3067\u5207\u308a\u66ff\u3048\u3089\u308c\u308b\u4e00\u5f0f\u3067\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline {\n  position: relative;\n  list-style: none;\n  margin: 0;\n  padding: 0 0 0 32px;\n  max-width: 800px;\n}\n\n.timeline::before {\n  content: \"\";\n  position: absolute;\n  top: 8px;\n  bottom: 8px;\n  left: 7px;\n  width: 2px;\n  background-color: #e5e7eb;\n}\n\n.timeline__item {\n  position: relative;\n  padding-bottom: 32px;\n}\n\n.timeline__item:last-child {\n  padding-bottom: 0;\n}\n\n.timeline__item::before {\n  content: \"\";\n  position: absolute;\n  z-index: 1;\n  top: 6px;\n  left: -32px;\n  width: 16px;\n  height: 16px;\n  border-radius: 50%;\n  background-color: #10b981;\n  border: 3px solid #fff;\n  box-shadow: 0 0 0 2px #10b981;\n}\n\n.timeline__date {\n  display: block;\n  margin-bottom: 4px;\n  color: #0f9d6f;\n  font-weight: 700;\n  font-size: 0.9em;\n  white-space: nowrap;\n}\n\n.timeline__title {\n  margin: 0 0 6px;\n  font-size: 1.1rem;\n}\n\n.timeline__text {\n  margin: 0;\n  line-height: 1.8;\n}<\/code><\/pre><\/div>\n\n<h2 class=\"wp-block-heading\">\u7dda\u3068\u4e38\u306e\u30c7\u30b6\u30a4\u30f3\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3<\/h2>\n\n<p class=\"wp-block-paragraph\">\u540c\u3058\u69cb\u9020\u306e\u307e\u307e\u3001\u7dda\u3068\u4e38\u306e\u898b\u305b\u65b9\u3092\u5909\u3048\u308b\u3060\u3051\u3067\u5370\u8c61\u304c\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u70b9\u7dda\u306b\u3057\u3066\u8efd\u3055\u3092\u51fa\u3059<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-dotted::before {\n  width: 0;\n  background: none;\n  border-left: 2px dashed #cbd5e1;\n}\n\n.timeline.-dotted .timeline__item::before {\n  background-color: #fff;\n  border: 3px solid #10b981;\n  box-shadow: none;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u7834\u7dda\u306b\u3059\u308b\u3068\u300c\u9032\u884c\u4e2d\u300d\u300c\u4e88\u5b9a\u300d\u3068\u3044\u3063\u305f\u672a\u78ba\u5b9a\u306e\u6d41\u308c\u306b\u5408\u3044\u307e\u3059\u3002\u4e38\u3092\u767d\u629c\u304d\u306b\u3059\u308b\u3068\u3001\u3055\u3089\u306b\u8efd\u3044\u5370\u8c61\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u7dda\u306b\u3059\u308b<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-grad::before {\n  width: 3px;\n  background-image: linear-gradient(to bottom, #10b981, #0ea5e9);\n  border-radius: 999px;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u59cb\u70b9\u3068\u7d42\u70b9\u3067\u8272\u304c\u5909\u308f\u308b\u306e\u3067\u3001<span class=\"swl-marker mark_yellow\">\u6642\u9593\u306e\u7d4c\u904e<\/span>\u304c\u8996\u899a\u7684\u306b\u4f1d\u308f\u308a\u307e\u3059\u3002\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3084\u6210\u9577\u904e\u7a0b\u306e\u7d39\u4ecb\u306b\u5411\u304f\u8868\u73fe\u3067\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u5b8c\u4e86\u30fb\u9032\u884c\u4e2d\u3067\u8272\u3092\u5206\u3051\u308b<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline__item.-done::before {\n  background-color: #10b981;\n  box-shadow: 0 0 0 2px #10b981;\n}\n\n.timeline__item.-current::before {\n  background-color: #fff;\n  box-shadow: 0 0 0 3px #0ea5e9, 0 0 0 8px rgba(14, 165, 233, .18);\n}\n\n.timeline__item.-todo::before {\n  background-color: #e5e7eb;\n  box-shadow: 0 0 0 2px #cbd5e1;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u9032\u884c\u72b6\u6cc1\u3092\u793a\u3059\u5834\u5408\u306f\u3001\u5b8c\u4e86\u30fb\u9032\u884c\u4e2d\u30fb\u672a\u7740\u624b\u306e3\u72b6\u614b\u3092\u8272\u3067\u5206\u3051\u307e\u3059\u3002\u73fe\u5728\u5730\u306e\u4e38\u3060\u3051\u5916\u5074\u306b\u6de1\u3044\u8f2a\u3092\u4ed8\u3051\u308b\u3068\u3001\u8996\u7dda\u304c\u96c6\u307e\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30ab\u30fc\u30c9\u578b\u3068\u7d44\u307f\u5408\u308f\u305b\u308b<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.timeline.-card .timeline__body {\n  padding: 18px 20px;\n  border-radius: 12px;\n  background-color: #fff;\n  box-shadow: 0 2px 10px rgba(15, 23, 42, .08);\n}\n\n.timeline.-card .timeline__body::before {\n  content: \"\";\n  position: absolute;\n  top: 14px;\n  left: -6px;\n  width: 12px;\n  height: 12px;\n  background-color: #fff;\n  transform: rotate(45deg);   \/* \u5439\u304d\u51fa\u3057\u306e\u4e09\u89d2 *\/\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u5185\u5bb9\u3092\u30ab\u30fc\u30c9\u306b\u8f09\u305b\u308b\u3068\u60c5\u5831\u91cf\u306e\u591a\u3044\u6cbf\u9769\u3067\u3082\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u5de6\u306b\u5c0f\u3055\u306a\u4e09\u89d2\u3092\u51fa\u3059\u3068\u3001\u7dda\u3068\u30ab\u30fc\u30c9\u304c\u3064\u306a\u304c\u3063\u3066\u898b\u3048\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u304c\u5411\u304f\u5834\u9762\u30fb\u5411\u304b\u306a\u3044\u5834\u9762<\/h2>\n\n<p class=\"wp-block-paragraph\">\u5f62\u304c\u9b45\u529b\u7684\u306a\u306e\u3067\u4f55\u306b\u3067\u3082\u4f7f\u3044\u305f\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u5411\u304d\u4e0d\u5411\u304d\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u5185\u5bb9<\/th><th>\u5411\u304d<\/th><th>\u7406\u7531<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u4f1a\u793e\u306e\u6cbf\u9769<\/td><td>\u5411\u304f<\/td><td>\u5e74\u3054\u3068\u306e\u9593\u9694\u306b\u610f\u5473\u304c\u3042\u308b<\/td><\/tr>\n<tr><td>\u7533\u8fbc\u307f\u306e\u6d41\u308c<\/td><td>\u5411\u304f<\/td><td>\u9806\u5e8f\u304c\u7406\u89e3\u306e\u52a9\u3051\u306b\u306a\u308b<\/td><\/tr>\n<tr><td>\u5b66\u7fd2\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/td><td>\u5411\u304f<\/td><td>\u524d\u5f8c\u95a2\u4fc2\u304c\u4f1d\u308f\u308b<\/td><\/tr>\n<tr><td>\u30b5\u30fc\u30d3\u30b9\u306e\u7279\u5fb4<\/td><td>\u5411\u304b\u306a\u3044<\/td><td>\u9806\u5e8f\u304c\u306a\u3044\u305f\u3081\u8aa4\u89e3\u3092\u751f\u3080<\/td><\/tr>\n<tr><td>\u6599\u91d1\u30d7\u30e9\u30f3\u6bd4\u8f03<\/td><td>\u5411\u304b\u306a\u3044<\/td><td>\u4e26\u5217\u6bd4\u8f03\u306f\u8868\u306e\u307b\u3046\u304c\u901f\u3044<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u5224\u65ad\u57fa\u6e96\u306f<span class=\"swl-marker mark_yellow\">\u9806\u5e8f\u306b\u610f\u5473\u304c\u3042\u308b\u304b\u3069\u3046\u304b<\/span>\u3060\u3051\u3067\u3059\u3002\u4e26\u5217\u306e\u60c5\u5831\u306b\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u4f7f\u3046\u3068\u3001\u8aad\u8005\u306f\u300c\u4e0a\u304b\u3089\u9806\u306b\u3084\u308b\u3082\u306e\u300d\u3068\u8aa4\u89e3\u3057\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u9805\u76ee\u306f5\u301c10\u4ef6\u304c\u8aad\u307f\u3084\u3059\u3044\u4e0a\u9650\u3002\u591a\u3044\u5834\u5408\u306f\u5e74\u4ee3\u3067\u307e\u3068\u3081\u308b<\/li>\n<li>1\u9805\u76ee\u306e\u672c\u6587\u306f2\u301c3\u884c\u306b\u53ce\u3081\u3001\u8a73\u7d30\u306f\u5225\u30da\u30fc\u30b8\u3078<\/li>\n<li>\u65e5\u4ed8\u306e\u8868\u8a18\u3086\u308c\uff082024\u5e74\uff0f2024.04\uff09\u3092\u30b5\u30a4\u30c8\u5185\u3067\u7d71\u4e00\u3059\u308b<\/li>\n<li>\u66f4\u65b0\u304c\u7d9a\u304f\u6cbf\u9769\u306f\u3001\u65b0\u3057\u3044\u9806\u306b\u3059\u308b\u304b\u53e4\u3044\u9806\u306b\u3059\u308b\u304b\u3092\u6c7a\u3081\u3066\u56fa\u5b9a\u3059\u308b<\/li>\n<\/ul>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306f\u300c\u89aa\u306e\u64ec\u4f3c\u8981\u7d20\u3067\u7e26\u7dda\u300d\u300c\u5404\u9805\u76ee\u306e\u64ec\u4f3c\u8981\u7d20\u3067\u4e38\u5370\u300d\u306e2\u3064\u3067\u4f5c\u308c\u307e\u3059\u3002\u9805\u76ee\u5074\u306b<code>position: relative<\/code>\u3092\u5fd8\u308c\u305a\u306b\u6307\u5b9a\u3059\u308b\u306e\u304c\u6700\u5927\u306e\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u6cbf\u9769\u306a\u3089\u65e5\u4ed8\u3092\u5de6\u306b\u7f6e\u304f2\u30ab\u30e9\u30e0\u578b\u3001\u7533\u8fbc\u307f\u306e\u6d41\u308c\u306a\u3089\u756a\u53f7\u3092\u81ea\u52d5\u63a1\u756a\u3059\u308b\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7\u304c\u5411\u304d\u307e\u3059\u3002\u30b8\u30b0\u30b6\u30b0\u578b\u3068\u6a2a\u578b\u306f\u30b9\u30de\u30db\u3067\u5fc5\u305a\u5d29\u308c\u308b\u305f\u3081\u3001640px\u4ee5\u4e0b\u3067\u7e26\u578b\u306b\u623b\u3059\u6307\u5b9a\u3092\u30bb\u30c3\u30c8\u3067\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u7dda\u304c\u4f38\u3073\u308b\u6f14\u51fa\u306f<code>animation-timeline: view()<\/code>\u3092<code>@supports<\/code>\u3067\u56f2\u3081\u3070\u3001\u672a\u5bfe\u5fdc\u74b0\u5883\u3067\u3082\u5b89\u5168\u306b\u5c0e\u5165\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<!-- withmedia-faq -->\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n<h3 class=\"wp-block-heading\">\u4e38\u5370\u306e\u4f4d\u7f6e\u304c\u601d\u3063\u305f\u5834\u6240\u306b\u6765\u307e\u305b\u3093\u3002<\/h3>\n\n<p class=\"wp-block-paragraph\">\u5404\u9805\u76ee\u306b<code>position: relative<\/code>\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6307\u5b9a\u304c\u306a\u3044\u3068\u3001\u4e38\u5370\u306f\u6700\u3082\u8fd1\u3044\u4f4d\u7f6e\u6307\u5b9a\u6e08\u307f\u306e\u7956\u5148\u8981\u7d20\u3001\u591a\u304f\u306e\u5834\u5408\u30da\u30fc\u30b8\u5168\u4f53\u3092\u57fa\u6e96\u306b\u914d\u7f6e\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u4f4d\u7f6e\u306e\u5fae\u8abf\u6574\u306f<code>top<\/code>\u3068<code>left<\/code>\u306e\u5024\u3067\u884c\u3044\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u9805\u76ee\u6570\u304c\u5897\u6e1b\u3057\u3066\u3082\u7dda\u306e\u9577\u3055\u3092\u5408\u308f\u305b\u308b\u306b\u306f\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u7dda\u3092\u5404\u9805\u76ee\u3067\u306f\u306a\u304f\u89aa\u8981\u7d20\u306e<code>::before<\/code>\u3067\u63cf\u304d\u3001<code>top<\/code>\u3068<code>bottom<\/code>\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u9ad8\u3055\u3092\u56fa\u5b9a\u5024\u3067\u306f\u306a\u304f\u4e0a\u4e0b\u304b\u3089\u306e\u8ddd\u96e2\u3067\u6c7a\u3081\u308b\u3053\u3068\u3067\u3001\u9805\u76ee\u6570\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u3067\u4f38\u7e2e\u3057\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u6a2a\u578b\u30b9\u30c6\u30c3\u30d7\u306e\u756a\u53f7\u3092\u81ea\u52d5\u3067\u632f\u308a\u305f\u3044\u3067\u3059\u3002<\/h3>\n\n<p class=\"wp-block-paragraph\">\u89aa\u306b<code>counter-reset: step<\/code>\u3001\u5404\u9805\u76ee\u306b<code>counter-increment: step<\/code>\u3068<code>content: counter(step)<\/code>\u3092\u6307\u5b9a\u3059\u308c\u3070\u81ea\u52d5\u63a1\u756a\u3055\u308c\u307e\u3059\u3002HTML\u306b\u6570\u5b57\u3092\u66f8\u304b\u306a\u3044\u305f\u3081\u3001\u9806\u756a\u3092\u5165\u308c\u66ff\u3048\u3066\u3082\u756a\u53f7\u304c\u305a\u308c\u307e\u305b\u3093\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u306e\u6f14\u51fa\u306fJavaScript\u306a\u3057\u3067\u53ef\u80fd\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\"><code>animation-timeline: view()<\/code>\u3092\u4f7f\u3048\u3070CSS\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u304c\u9650\u3089\u308c\u308b\u305f\u3081\u3001<code>@supports<\/code>\u3067\u56f2\u3093\u3067\u672a\u5bfe\u5fdc\u74b0\u5883\u3067\u306f\u9759\u7684\u306b\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5e45\u5e83\u3044\u74b0\u5883\u3067\u78ba\u5b9f\u306b\u52d5\u304b\u3059\u306a\u3089Intersection Observer\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306b\u9069\u3057\u305fHTML\u30bf\u30b0\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n<p 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