1 files changed, 62 insertions, 0 deletions
diff --git a/src/styles/custom.css b/src/styles/custom.css
index 1ea4aa7..ba1f7ed 100644
--- a/src/styles/custom.css
+++ b/src/styles/custom.css
@@ -173,6 +173,68 @@
   box-shadow: none;
 }
 
+/* 公園ページの折りたたみ（説明・凡例） */
+.sl-markdown-content details.page-help,
+.sl-markdown-content details.park-map-help {
+  margin: 0.75rem 0;
+  border: 1px solid var(--sl-color-gray-5);
+  border-radius: 10px;
+  background: var(--sl-color-gray-6);
+  overflow: hidden;
+}
+.sl-markdown-content details.page-help > summary,
+.sl-markdown-content details.park-map-help > summary {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.5rem;
+  padding: 0.65rem 0.9rem;
+  background: transparent;
+  color: var(--sl-color-text);
+  font-size: 0.92rem;
+  font-weight: 600;
+  list-style: none;
+}
+.sl-markdown-content details.page-help > summary::-webkit-details-marker,
+.sl-markdown-content details.park-map-help > summary::-webkit-details-marker {
+  display: none;
+}
+.sl-markdown-content details.page-help > summary::after,
+.sl-markdown-content details.park-map-help > summary::after {
+  content: "▾";
+  flex: none;
+  color: var(--sl-color-gray-3);
+  transition: transform 0.15s ease;
+}
+.sl-markdown-content details.page-help[open] > summary::after,
+.sl-markdown-content details.park-map-help[open] > summary::after {
+  transform: rotate(180deg);
+}
+.sl-markdown-content details.page-help > summary:hover,
+.sl-markdown-content details.park-map-help > summary:hover {
+  background: var(--sl-color-gray-5);
+}
+.sl-markdown-content details.page-help[open] > summary,
+.sl-markdown-content details.park-map-help[open] > summary {
+  border-bottom: 1px solid var(--sl-color-gray-5);
+}
+.sl-markdown-content details.page-help > p,
+.sl-markdown-content details.page-help > ul,
+.sl-markdown-content details.page-help > ol,
+.sl-markdown-content details.park-map-help > p {
+  margin-left: 0.9rem;
+  margin-right: 0.9rem;
+}
+.sl-markdown-content details.page-help > p:first-of-type,
+.sl-markdown-content details.park-map-help > p:first-of-type {
+  margin-top: 0.65rem;
+}
+.sl-markdown-content details.page-help > p:last-child,
+.sl-markdown-content details.page-help > ul:last-child,
+.sl-markdown-content details.park-map-help > p:last-child {
+  margin-bottom: 0.75rem;
+}
+
 /* ── アーカイブの表（保存日・更新日の列） ── */
 .archive-table table th:nth-child(2),
 .archive-table table td:nth-child(2),