diff --git a/website/templates/site.css b/website/templates/site.css
index c19f2ae1..13ffabb2 100644
--- a/website/templates/site.css
+++ b/website/templates/site.css
@@ -1,7 +1,7 @@
 :root { --theme-color: #2a7a5a; }
 body, .sidebar, .sidebar-toggle { background: #f3f2ee; }
 /* 载入提示：vue.css 的 div#app { margin: 40vh auto } 会穿透到 body，载入完成时整页从屏幕中间跳到顶部 */
-div#app { display: flex; align-items: center; justify-content: center; min-height: 100vh; margin: 0; color: #718078; font-size: 14px; letter-spacing: .04em; }
+div#app { display: flex; align-items: center; justify-content: center; min-height: 100vh; margin: 0; color: #5f6d66; font-size: 14px; letter-spacing: .04em; }
 /* 载入完成前 body 不能滚动，出现滚动条时页面会左移；预留滚动条的位置 */
 html { scrollbar-gutter: stable; }
 body { color: #34495e; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
@@ -11,7 +11,7 @@ body { color: #34495e; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI
 .search input { background: #fff !important; border-radius: 6px; }
 .sidebar-nav > ul { padding-left: 18px; }
 .sidebar ul li { margin: 7px 0; }
-.sidebar ul li strong { font-size: 13px; letter-spacing: .08em; color: #718078; }
+.sidebar ul li strong { font-size: 13px; letter-spacing: .08em; color: #5f6d66; }
 .sidebar ul li a { font-size: 14px; }
 .markdown-section { max-width: 960px; padding: 36px 48px 100px; }
 .markdown-section h1 { margin: 1rem 0 2rem; font-size: 2rem; }
@@ -34,12 +34,12 @@ body { color: #34495e; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI
 .site-search { padding: 8px 15px; }
 .site-search input { box-sizing: border-box; width: 100%; min-height: 42px; padding: 10px; border: 1px solid #dfe3da; color: #34495e; font-size: 15px; }
 .site-search input:focus { outline: 2px solid #2a7a5a; outline-offset: 1px; }
-.search-status { color: #718078; font-size: 12px; margin: 7px 0; }
+.search-status { color: #5f6d66; font-size: 12px; margin: 7px 0; }
 .search-status:empty { display: none; }
 .site-search .matching-post { display: block; padding: 12px 0; border-bottom: 1px solid #dde3d8; text-decoration: none; }
 .matching-post strong, .matching-post small { display: block; }
 .matching-post strong { color: #2a7a5a; font-size: 14px; }
-.matching-post small { color: #718078; margin: 5px 0; font-size: 12px; }
+.matching-post small { color: #5f6d66; margin: 5px 0; font-size: 12px; }
 .matching-post p { color: #34495e; margin: 4px 0; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
 .article-toc { border: 1px solid #dfe3da; border-radius: 7px; padding: 12px 18px; margin: 20px 0 28px; background: #fafbf8; }
 .article-toc summary { color: #2a7a5a; font-weight: 600; cursor: pointer; min-height: 24px; }
@@ -95,7 +95,7 @@ body { color: #34495e; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI
 .anim-bar { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 6px 0 4px; }
 .anim-bar button { min-height: 30px; padding: 2px 12px; border: 1px solid #dfe3da; border-radius: 6px; background: #fafbf8; color: #34495e; font: inherit; font-size: 13px; cursor: pointer; }
 .anim-bar button:hover, .anim-bar button:focus-visible { border-color: #2a7a5a; color: #2a7a5a; }
-.anim-count { min-width: 44px; color: #718078; font-size: 12px; font-variant-numeric: tabular-nums; }
+.anim-count { min-width: 44px; color: #5f6d66; font-size: 12px; font-variant-numeric: tabular-nums; }
 
 /* 代码高亮：在 #f8f8f8 底上对比度不低于 4.5:1 */
 .markdown-section code { color: #9a3f2a; }
@@ -143,3 +143,4 @@ body { color: #34495e; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI
   .markdown-section table { display: table; }
   .markdown-section tr { break-inside: avoid; }
 }
+.markdown-section pre > code[tabindex]:focus-visible, .markdown-section table[tabindex]:focus-visible { outline: 2px solid currentColor; outline-offset: -2px; }