diff --git a/web/App.vue b/web/App.vue
index b103444..1c1e490 100644
--- a/web/App.vue
+++ b/web/App.vue
@@ -137,14 +137,22 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
 </template>
 
 <style scoped>
+/*
+ * 侧栏折叠的做法：只过渡外层宽度，内层内容保持展开时的固定宽度、被 overflow 裁切，
+ * 文字用透明度淡出。不用 display: none 藏文字——那会让内容在动画中途重排、图标跳位。
+ * 60px 这个折叠宽度是算出来的：图标中心在 12+1+8+9=30px，正好是 60 的一半，
+ * 收拢后图标视觉居中，全程不需要挪动任何东西。
+ */
 .shell {
+  --side-w: 184px;
   display: grid;
-  grid-template-columns: 184px 1fr;
+  grid-template-columns: var(--side-w) 1fr;
   min-height: 100%;
+  transition: grid-template-columns 0.3s ease;
 }
 
 .shell.is-compact {
-  grid-template-columns: 56px 1fr;
+  --side-w: 60px;
 }
 
 /* ── 侧栏 ───────────────────────────────────── */
@@ -163,6 +171,14 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
   padding: var(--s-4) var(--s-3);
   border-right: 1px solid var(--c-border);
   background: var(--c-surface);
+  overflow: hidden;
+}
+
+/* 内容按展开宽度定死（184 - 24 内边距 - 1 边框），收拢时被裁掉而不是挤压换行 */
+.brand,
+.nav,
+.side-foot {
+  min-width: 159px;
 }
 
 .brand {
@@ -204,6 +220,19 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
   white-space: nowrap;
 }
 
+/* 收拢时淡出的文字。比外层宽度的 0.3s 快，字先消失、再收边，不露半截字 */
+.brand-name,
+.nav-label,
+.kernel {
+  transition: opacity 0.2s ease;
+}
+
+.is-compact .brand-name,
+.is-compact .nav-label,
+.is-compact .kernel {
+  opacity: 0;
+}
+
 .nav {
   list-style: none;
   margin: 0;
@@ -249,9 +278,9 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
 .side-foot {
   display: flex;
   align-items: center;
-  justify-content: space-between;
   gap: var(--s-2);
-  padding: 0 var(--s-2);
+  /* 右边给绝对定位的折叠按钮留位置 */
+  padding: 0 44px 0 var(--s-2);
 }
 
 .kernel {
@@ -281,10 +310,14 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
   text-overflow: ellipsis;
 }
 
+/* 钉在侧栏右下角：宽度过渡时自动跟着边缘走。right 取 17 是为了收拢到 60px 时正好居中 */
 .densify {
-  flex: none;
-  display: grid;
-  place-items: center;
+  position: absolute;
+  right: 17px;
+  bottom: var(--s-4);
+  display: flex;
+  align-items: center;
+  justify-content: center;
   width: 26px;
   height: 26px;
   border: 1px solid transparent;
@@ -298,21 +331,6 @@ const current = computed(() => NAV.find((n) => n.key === active.value))
   color: var(--c-text);
 }
 
-/* 紧凑模式：文字收起来，只留图标 */
-.is-compact .brand-name,
-.is-compact .nav-label,
-.is-compact .kernel-text {
-  display: none;
-}
-.is-compact .brand,
-.is-compact .nav-item {
-  justify-content: center;
-  padding-left: 0;
-  padding-right: 0;
-}
-.is-compact .side-foot {
-  flex-direction: column;
-}
 
 /* ── 主区 ───────────────────────────────────── */
 .main {
diff --git a/web/views/InboundDetail.vue b/web/views/InboundDetail.vue
index 0dd83a7..c43a0b8 100644
--- a/web/views/InboundDetail.vue
+++ b/web/views/InboundDetail.vue
@@ -147,6 +147,42 @@ function toggleOpen() {
   open.value = !open.value
   if (open.value) void revealBottom()
 }
+
+/**
+ * 切换选中的入站时，内容淡出淡入，容器高度从旧值滑到新值。
+ * 高度过渡没法纯 CSS 做：auto 不可插值。所以离开前把当前高度钉住，
+ * 新内容进场时量出目标高度、过渡过去，结束后清掉内联样式让内容重新做主。
+ */
+function lockHeight() {
+  const el = rootEl.value
+  if (!el) return
+  el.style.height = `${String(el.offsetHeight)}px`
+  el.style.overflow = 'hidden'
+}
+
+function settleHeight() {
+  const el = rootEl.value
+  if (!el || !el.style.height) return
+  const from = el.style.height
+  el.style.height = 'auto'
+  const to = `${String(el.offsetHeight)}px`
+  if (to === from) {
+    el.style.height = ''
+    el.style.overflow = ''
+    return
+  }
+  el.style.height = from
+  void el.offsetHeight
+  el.style.transition = 'height 0.15s ease'
+  el.style.height = to
+  el.addEventListener('transitionend', function done(event) {
+    if (event.propertyName !== 'height') return
+    el.removeEventListener('transitionend', done)
+    el.style.transition = ''
+    el.style.height = ''
+    el.style.overflow = ''
+  })
+}
 const form = ref<OutboundSetup>({ proxy: { sources: [], filter: null }, chain: null })
 
 /**
@@ -338,6 +374,15 @@ const complete = computed(
 
 <template>
   <aside ref="rootEl" class="detail">
+    <!-- 换一路入站：淡出旧内容、淡入新内容，高度的过渡由上面两个钩子做 -->
+    <Transition
+      name="swap"
+      mode="out-in"
+      @before-leave="lockHeight"
+      @enter="settleHeight"
+      @after-enter="moveInk"
+    >
+    <div :key="inbound.id">
     <header class="top">
       <div class="title">
         <span class="port mono">{{ inbound.port }}</span>
@@ -588,6 +633,8 @@ const complete = computed(
         </div>
       </section>
     </template>
+    </div>
+    </Transition>
   </aside>
 </template>
 
@@ -779,6 +826,17 @@ h3 {
   opacity: 0;
 }
 
+/* 切换入站的内容淡切。高度的过渡不在这里，由 lockHeight/settleHeight 用内联样式做 */
+.swap-enter-active,
+.swap-leave-active {
+  transition: opacity 0.12s ease;
+}
+
+.swap-enter-from,
+.swap-leave-to {
+  opacity: 0;
+}
+
 .grid {
   display: grid;
   grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));