diff --git a/templates/auth/register.html b/templates/auth/register.html
index 9f31d39..e903113 100644
--- a/templates/auth/register.html
+++ b/templates/auth/register.html
@@ -4,7 +4,7 @@
     background-color: #ffe0e0;
     color: #c0392b;
     padding: 0 4px;
-    border-radius: 4px;
+    border-radius: var(--tb-radius-xs);
     font-weight: 600;
   }
   html[data-theme="dark"] .tb-domain-sep {
diff --git a/templates/base/header.html b/templates/base/header.html
index 67f3f7f..9ad6e41 100644
--- a/templates/base/header.html
+++ b/templates/base/header.html
@@ -45,7 +45,7 @@
           align-items: center;
           background: #f0f2f5;
           border: 1px solid #dcdcdc;
-          border-radius: 8px;
+          border-radius: var(--tb-radius-sm);
           padding: 8px 8px 8px 16px;
           gap: 6px;
           transition: border-color 0.2s;
@@ -69,8 +69,8 @@
           font-size: 1.2rem;
           font-family: "Courier New", monospace;
           font-weight: 600;
-          border: 1px solid #ccc;
-          border-radius: 5px;
+          border: 1px solid var(--tb-border);
+          border-radius: var(--tb-radius-sm);
           outline: none;
           transition: border-color 0.15s, box-shadow 0.15s;
           background: #fff;
diff --git a/templates/chat/conversation.html b/templates/chat/conversation.html
index 8d9fdc7..49b0439 100644
--- a/templates/chat/conversation.html
+++ b/templates/chat/conversation.html
@@ -20,7 +20,7 @@
   .custom-lightbox img {
     max-width: 90%;
     max-height: 80%;
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     box-shadow: 0 0 30px rgba(0,0,0,0.5);
   }
   .custom-lightbox .close-btn {
@@ -59,7 +59,7 @@
       <li class="uk-margin-small-bottom" data-page-node-id="LSFm4EINd1XxnwZSFbAlji">
         <div class="uk-flex {{ if $isMyMessage }}uk-flex-right{{ else }}uk-flex-left{{ end }}" data-page-node-id="afhl9aZDsknmAlut7imPnp">
           <div class="uk-card uk-card-hover uk-card-body uk-padding-small uk-margin-small-left uk-margin-small-right" 
-               style="max-width: 75%; border-radius: 12px; background-color: {{ if $isMyMessage }}#e6ffe6{{ else }}#f0f8ff{{ end }};" data-page-node-id="zPuwctcKF6xPKnwQKaYADD">
+               style="max-width: 75%; border-radius: var(--tb-radius); background-color: {{ if $isMyMessage }}#e6ffe6{{ else }}#f0f8ff{{ end }};" data-page-node-id="zPuwctcKF6xPKnwQKaYADD">
             <div class="uk-flex uk-flex-middle uk-margin-small-bottom" data-page-node-id="NuHyY57VYOUYQWdpRPqeS6">
               <span class="uk-icon" uk-icon="user" data-page-node-id="ctN3HeenrU4wiv39zSfOgY"></span>
               <strong class="uk-margin-small-left" data-page-node-id="V7t5pBo43sNBv1a6rvp0jv">
@@ -78,7 +78,7 @@
               {{ range (index $.MessageImages .ID) }}
               <div class="uk-margin-small-top" data-page-node-id="sB1P5iHpDXEjFBdUymfkxz">
                 <img src="{{ .URL }}" alt="{{ .FileName }}" 
-                     style="max-width: 200px; max-height: 200px; border-radius: 8px; cursor: pointer;" 
+                     style="max-width: 200px; max-height: 200px; border-radius: var(--tb-radius-sm); cursor: pointer;" 
                      onclick="openLightbox('{{ .URL }}', '{{ .FileName }}')" data-page-node-id="siJUfJdLhG2zPrXzGC1KZ3" />
               </div>
               {{ end }}
diff --git a/templates/home.html b/templates/home.html
index 9c7ba10..58952ad 100644
--- a/templates/home.html
+++ b/templates/home.html
@@ -9,7 +9,7 @@
   }
   .tb-hero-title {
     margin: 0;
-    font-size: 1.75rem;
+    font-size: var(--tb-fs-hero);
     line-height: 1.35;
     font-weight: 600;
     color: var(--tb-text);
@@ -17,7 +17,7 @@
   .tb-hero-lead {
     margin: 12px auto 0;
     max-width: 30rem;
-    font-size: 0.95rem;
+    font-size: var(--tb-fs-lg);
     line-height: 1.8;
     color: var(--tb-text-muted);
   }
@@ -43,13 +43,13 @@
   }
   .tb-card-title {
     margin: 0 0 6px;
-    font-size: 0.98rem;
+    font-size: var(--tb-fs-lg);
     font-weight: 600;
     color: var(--tb-text);
   }
   .tb-card-text {
     margin: 0;
-    font-size: 0.86rem;
+    font-size: var(--tb-fs-md);
     line-height: 1.7;
     color: var(--tb-text-muted);
   }
@@ -64,7 +64,7 @@
   }
   .tb-section-title {
     margin: 0 0 10px;
-    font-size: 0.95rem;
+    font-size: var(--tb-fs-lg);
     font-weight: 600;
     color: var(--tb-text);
   }
@@ -75,18 +75,18 @@
     border-radius: var(--tb-radius-xs);
     background: var(--tb-primary-weak);
     color: var(--tb-primary);
-    font-size: 0.75rem;
+    font-size: var(--tb-fs-xs);
   }
   .tb-list {
     margin: 0;
     padding-left: 1.15em;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     line-height: 1.9;
     color: var(--tb-text);
   }
   .tb-changelog summary {
     cursor: pointer;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     font-weight: 600;
     color: var(--tb-text);
     list-style: none;
@@ -108,7 +108,7 @@
   }
   .tb-stat-num {
     display: block;
-    font-size: 1.5rem;
+    font-size: var(--tb-fs-xl);
     font-weight: 600;
     line-height: 1.3;
     color: var(--tb-text);
@@ -116,20 +116,20 @@
   .tb-stat-label {
     display: block;
     margin-top: 2px;
-    font-size: 0.78rem;
+    font-size: var(--tb-fs-xs);
     color: var(--tb-text-muted);
   }
   .tb-stats-meta {
     margin: 14px 0 0;
-    font-size: 0.78rem;
+    font-size: var(--tb-fs-xs);
     line-height: 1.8;
     color: var(--tb-text-muted);
     text-align: center;
   }
   @media (max-width: 480px) {
     .tb-hero { padding: 28px 16px 24px; }
-    .tb-hero-title { font-size: 1.4rem; }
-    .tb-stat-num { font-size: 1.25rem; }
+    .tb-hero-title { font-size: var(--tb-fs-xl); }
+    .tb-stat-num { font-size: var(--tb-fs-lg); }
   }
 </style>
 
diff --git a/templates/question/item.html b/templates/question/item.html
index fe442a5..0367600 100644
--- a/templates/question/item.html
+++ b/templates/question/item.html
@@ -17,7 +17,7 @@
     .tb-followup-card {
         border: 1px solid #e7e9ec;
         border-left: 3px solid #b0b6bd;
-        border-radius: 8px;
+        border-radius: var(--tb-radius-sm);
         padding: 12px 14px;
         background: #fbfbfc;
     }
diff --git a/templates/question/list.html b/templates/question/list.html
index 5b0af0d..6cbf5da 100644
--- a/templates/question/list.html
+++ b/templates/question/list.html
@@ -26,7 +26,7 @@
     display: block;
     overflow: hidden;
     color: var(--tb-text);
-    font-size: 0.98rem;
+    font-size: var(--tb-fs-md);
     font-weight: 600;
     line-height: 1.45;
     text-overflow: ellipsis;
@@ -39,11 +39,11 @@
     gap: 7px;
     margin-top: 8px;
   }
-  .profile-vote-meta .uk-label { font-size: 0.72rem; line-height: 1.6; }
+  .profile-vote-meta .uk-label { font-size: var(--tb-fs-xs); line-height: 1.6; }
   .profile-vote-action {
     flex: 0 0 auto;
     color: var(--tb-primary);
-    font-size: 0.82rem;
+    font-size: var(--tb-fs-md);
     white-space: nowrap;
   }
   html[data-theme="dark"] .profile-vote-item { border-color: var(--tb-border); }
@@ -58,18 +58,18 @@
     margin-top: 20px;
     margin-bottom: 18px;
     border: 1px solid var(--tb-border);
-    border-radius: 9px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface-2);
   }
   .profile-tab {
     flex: 1;
     border: 0;
-    border-radius: 6px;
+    border-radius: var(--tb-radius-xs);
     padding: 9px 15px;
     background: transparent;
     color: var(--tb-text-muted);
     cursor: pointer;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     transition: background 0.2s ease, color 0.2s ease;
   }
   .profile-tab:hover { color: var(--tb-primary); }
diff --git a/templates/sponsor.html b/templates/sponsor.html
index ae8c551..4e3a083 100644
--- a/templates/sponsor.html
+++ b/templates/sponsor.html
@@ -9,7 +9,7 @@
         background: #eee;
         color: #fff;
         box-shadow: 0 0 5px 0 #ccc;
-        border-radius: 5px;
+        border-radius: var(--tb-radius-sm);
         line-height: 0;
     }
 
diff --git a/templates/user/explore.html b/templates/user/explore.html
index 7ea2376..7c6fa50 100644
--- a/templates/user/explore.html
+++ b/templates/user/explore.html
@@ -24,7 +24,7 @@
     min-width: 0;
   }
   .explore-name {
-    font-size: 1.2rem;
+    font-size: var(--tb-fs-lg);
     font-weight: bold;
     margin-bottom: 5px;
   }
@@ -38,7 +38,7 @@
   .explore-intro {
     color: var(--tb-text-secondary);
     margin-bottom: 10px;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     display: -webkit-box;
     -webkit-line-clamp: 2;
     -webkit-box-orient: vertical;
@@ -61,7 +61,7 @@
     align-items: center;
     padding: 10px;
     background: var(--tb-surface-2);
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     transition: background 0.2s;
   }
   .recommend-card:hover {
@@ -79,7 +79,7 @@
   }
   .recommend-name {
     font-weight: bold;
-    font-size: 1rem;
+    font-size: var(--tb-fs-lg);
   }
   .recommend-name a {
     text-decoration: none;
@@ -92,7 +92,7 @@
     margin-top: 3px;
   }
   .recommend-tags .uk-label {
-    font-size: 0.7rem;
+    font-size: var(--tb-fs-xs);
     padding: 0 5px;
   }
   .hot-votes-list {
@@ -109,7 +109,7 @@
     min-width: 0;
     padding: 16px 18px;
     border: 1px solid var(--tb-border);
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface-2);
     text-decoration: none;
     transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
@@ -127,7 +127,7 @@
     display: block;
     overflow: hidden;
     color: var(--tb-text);
-    font-size: 0.98rem;
+    font-size: var(--tb-fs-md);
     font-weight: 600;
     line-height: 1.45;
     text-overflow: ellipsis;
@@ -141,13 +141,13 @@
     margin-top: 8px;
   }
   .hot-vote-meta .uk-label {
-    font-size: 0.72rem;
+    font-size: var(--tb-fs-xs);
     line-height: 1.6;
   }
   .hot-vote-action {
     flex: 0 0 auto;
     color: var(--tb-primary);
-    font-size: 0.82rem;
+    font-size: var(--tb-fs-md);
     white-space: nowrap;
   }
   html[data-theme="dark"] .hot-vote-item {
@@ -177,17 +177,17 @@
     margin: 2px auto 20px;
     max-width: 320px;
     border: 1px solid var(--tb-border);
-    border-radius: 9px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface-2);
   }
   .explore-tab {
     border: 0;
-    border-radius: 6px;
+    border-radius: var(--tb-radius-xs);
     padding: 8px 15px;
     background: transparent;
     color: var(--tb-text-secondary);
     cursor: pointer;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     transition: background 0.2s ease, color 0.2s ease;
   }
   .explore-tab:hover { color: var(--tb-primary); }
@@ -209,12 +209,12 @@
   .vote-random-btn {
     flex: 0 0 auto;
     border: 1px solid #dce9ff;
-    border-radius: 7px;
+    border-radius: var(--tb-radius-sm);
     padding: 7px 11px;
     color: var(--tb-primary);
     background: #f5faff;
     cursor: pointer;
-    font-size: 0.84rem;
+    font-size: var(--tb-fs-xs);
   }
   .vote-random-btn:hover { border-color: var(--tb-primary); background: #edf6ff; }
   .all-votes-list { display: grid; gap: 10px; }
@@ -244,9 +244,9 @@
     border-left: 4px solid var(--tb-primary);
     padding: 15px 20px;
     margin-bottom: 20px;
-    border-radius: 4px;
+    border-radius: var(--tb-radius-xs);
     color: var(--tb-text);
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     line-height: 1.6;
   }
   .explore-notice strong {
@@ -258,7 +258,7 @@
     align-items: center;
     gap: 6px;
     padding: 5px 14px;
-    font-size: 0.85rem;
+    font-size: var(--tb-fs-md);
     line-height: 1.4;
     color: var(--tb-primary);
     background: transparent;
diff --git a/templates/user/profile.html b/templates/user/profile.html
index 65a20b5..4bc9481 100644
--- a/templates/user/profile.html
+++ b/templates/user/profile.html
@@ -36,7 +36,7 @@
     background: #fff;
     padding: 20px;
     border: 1px solid var(--tb-border);
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     text-align: center;
   }
   .preview-card .qrcode-wrapper {
@@ -77,13 +77,13 @@
     padding: 4px;
     margin-bottom: 18px;
     border: 1px solid var(--tb-border);
-    border-radius: 9px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface-2);
   }
   .profile-tab {
     flex: 1;
     border: 0;
-    border-radius: 6px;
+    border-radius: var(--tb-radius-xs);
     padding: 9px 8px;
     background: transparent;
     color: var(--tb-text-muted);
@@ -114,7 +114,7 @@
     gap: 12px;
     padding: 16px;
     border: 1px solid var(--tb-border);
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     background: #fff;
   }
   .feat-card-head {
@@ -129,7 +129,7 @@
     font-size: 0.72rem;
     line-height: 1.6;
     padding: 0 8px;
-    border-radius: 2px;
+    border-radius: var(--tb-radius-xs);
   }
   .feat-status.is-open { background: #32d296; color: #fff; }
   .feat-status.is-closed { background: #f0506e; color: #fff; }
@@ -201,7 +201,7 @@
     width: 130px;
     padding: 4px 8px;
     border: 1px solid var(--tb-border);
-    border-radius: 4px;
+    border-radius: var(--tb-radius-xs);
   }
   html[data-theme="dark"] .feat-day {
     border-color: var(--tb-border);
@@ -260,7 +260,7 @@
     gap: 6px;
     padding: 6px 8px;
     border: 1px solid var(--tb-border);
-    border-radius: 4px;
+    border-radius: var(--tb-radius-xs);
     background: #fff;
     cursor: text;
   }
@@ -270,7 +270,7 @@
     align-items: center;
     gap: 6px;
     padding: 2px 8px;
-    border-radius: 3px;
+    border-radius: var(--tb-radius-xs);
     background: var(--tb-primary);
     color: #fff;
     font-size: 0.875rem;
@@ -317,7 +317,7 @@
   .tb-pcard {
     background: var(--tb-surface);
     border: 1px solid var(--tb-border);
-    border-radius: 10px;
+    border-radius: var(--tb-radius-sm);
     padding: 13px 14px 8px;
     margin-bottom: 12px;
   }
@@ -369,7 +369,7 @@
     width: 267px;
     max-width: 100%;
     aspect-ratio: 16 / 9;
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
   }
   .tb-media-frame img {
     width: 100%;
diff --git a/templates/user/question-list.html b/templates/user/question-list.html
index 11e851a..2a7c6f4 100644
--- a/templates/user/question-list.html
+++ b/templates/user/question-list.html
@@ -9,18 +9,18 @@
     margin: 6px auto 20px;
     max-width: 320px;
     border: 1px solid var(--tb-border);
-    border-radius: 9px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface-2);
   }
   .qlist-tab {
     flex: 1 1 0;
     border: 0;
-    border-radius: 6px;
+    border-radius: var(--tb-radius-xs);
     padding: 8px 15px;
     background: transparent;
     color: var(--tb-text-secondary);
     cursor: pointer;
-    font-size: 0.9rem;
+    font-size: var(--tb-fs-md);
     transition: background 0.2s ease, color 0.2s ease;
   }
   .qlist-tab:hover { color: var(--tb-primary); }
@@ -48,7 +48,7 @@
     display: block;
     overflow: hidden;
     color: var(--tb-text);
-    font-size: 0.98rem;
+    font-size: var(--tb-fs-md);
     font-weight: 600;
     line-height: 1.45;
     text-overflow: ellipsis;
@@ -62,8 +62,8 @@
     gap: 7px;
     margin-top: 8px;
   }
-  .hot-vote-meta .uk-label { font-size: 0.72rem; line-height: 1.6; }
-  .hot-vote-action { flex: 0 0 auto; color: var(--tb-primary); font-size: 0.82rem; white-space: nowrap; }
+  .hot-vote-meta .uk-label { font-size: var(--tb-fs-xs); line-height: 1.6; }
+  .hot-vote-action { flex: 0 0 auto; color: var(--tb-primary); font-size: var(--tb-fs-md); white-space: nowrap; }
   /* 提问列表右上角：状态标签与操作按钮统一尺寸（等宽等高、垂直居中、完全对齐）。
      每个元素显式带 .qlist-pill 类，选择器挂在 .qlist-pills 容器下提升优先级，
      避免浏览器对 <button> 的默认样式或 UIkit .uk-label 造成差异。
@@ -77,10 +77,10 @@
     min-width: 40px;
     padding: 0 8px;
     box-sizing: border-box;
-    font-size: 0.72rem;
+    font-size: var(--tb-fs-xs);
     line-height: 1;
     white-space: nowrap;
-    border-radius: 2px;
+    border-radius: var(--tb-radius-xs);
     border: 0;
     vertical-align: middle;
   }
@@ -133,13 +133,13 @@
   .qlist-stat {
     background: #fff;
     border: 1px solid var(--tb-border);
-    border-radius: 9px;
+    border-radius: var(--tb-radius-sm);
     padding: 8px 6px;
     text-align: center;
   }
   .qlist-stat .qlist-stat-num {
     display: block;
-    font-size: 1.15rem;
+    font-size: var(--tb-fs-lg);
     font-weight: 700;
     line-height: 1.15;
     color: #222;
@@ -147,7 +147,7 @@
   .qlist-stat .qlist-stat-lbl {
     display: block;
     margin-top: 2px;
-    font-size: 0.7rem;
+    font-size: var(--tb-fs-xs);
     color: #888;
     line-height: 1.15;
   }
diff --git a/templates/vote/page.html b/templates/vote/page.html
index 0fbc946..4434b6c 100644
--- a/templates/vote/page.html
+++ b/templates/vote/page.html
@@ -24,7 +24,7 @@
     padding: 12px 14px;
     margin-bottom: 8px;
     border: 1px solid var(--tb-border);
-    border-radius: 8px;
+    border-radius: var(--tb-radius-sm);
     background: var(--tb-surface);
     cursor: pointer;
     transition: border-color 0.2s ease, background 0.2s ease;