diff --git a/src/components/layout/MainLayout.tsx b/src/components/layout/MainLayout.tsx
index 0543a08..dc263dd 100644
--- a/src/components/layout/MainLayout.tsx
+++ b/src/components/layout/MainLayout.tsx
@@ -241,6 +241,37 @@ export function MainLayout() {
     };
   }, []);
 
+  // 将主内容区的中心点写入 CSS 变量，供底部浮层（如配置面板操作栏）对齐到内容区而非整窗
+  useLayoutEffect(() => {
+    const updateContentCenter = () => {
+      const el = contentRef.current;
+      if (!el) return;
+      const rect = el.getBoundingClientRect();
+      const centerX = rect.left + rect.width / 2;
+      document.documentElement.style.setProperty('--content-center-x', `${centerX}px`);
+    };
+
+    updateContentCenter();
+
+    const resizeObserver =
+      typeof ResizeObserver !== 'undefined' && contentRef.current
+        ? new ResizeObserver(updateContentCenter)
+        : null;
+
+    if (resizeObserver && contentRef.current) {
+      resizeObserver.observe(contentRef.current);
+    }
+
+    window.addEventListener('resize', updateContentCenter);
+
+    return () => {
+      if (resizeObserver) {
+        resizeObserver.disconnect();
+      }
+      window.removeEventListener('resize', updateContentCenter);
+    };
+  }, []);
+
   // 5秒后自动收起品牌名称
   useEffect(() => {
     brandCollapseTimer.current = setTimeout(() => {
diff --git a/src/components/providers/ProviderNav/ProviderNav.module.scss b/src/components/providers/ProviderNav/ProviderNav.module.scss
index 310a857..7c169d7 100644
--- a/src/components/providers/ProviderNav/ProviderNav.module.scss
+++ b/src/components/providers/ProviderNav/ProviderNav.module.scss
@@ -2,25 +2,34 @@
 
 .navContainer {
   position: fixed;
-  right: 24px;
-  top: 50%;
-  transform: translateY(-50%);
+  left: var(--content-center-x, 50%);
+  bottom: calc(12px + env(safe-area-inset-bottom));
+  transform: translateX(-50%);
   z-index: 50;
   pointer-events: auto;
+  width: fit-content;
+  max-width: calc(100vw - 24px);
 }
 
 .navList {
   position: relative;
-  display: flex;
-  flex-direction: column;
-  gap: 8px;
-  padding: 12px 8px;
+  display: inline-flex;
+  flex-direction: row;
+  gap: 6px;
+  padding: 10px 12px;
   background: rgba(255, 255, 255, 0.7);
   backdrop-filter: blur(12px);
   -webkit-backdrop-filter: blur(12px);
   border: 1px solid rgba(255, 255, 255, 0.3);
-  border-radius: 16px;
+  border-radius: 999px;
   box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
+  overflow-x: auto;
+  scrollbar-width: none;
+  max-width: inherit;
+
+  &::-webkit-scrollbar {
+    display: none;
+  }
 }
 
 .indicator {
@@ -29,7 +38,7 @@
   left: 0;
   pointer-events: none;
   opacity: 0;
-  border-radius: 10px;
+  border-radius: 999px;
   background: rgba(59, 130, 246, 0.15);
   box-shadow: inset 0 0 0 2px var(--primary-color);
   transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
@@ -58,9 +67,10 @@
   padding: 0;
   border: none;
   background: transparent;
-  border-radius: 10px;
+  border-radius: 999px;
   cursor: pointer;
   transition: background-color 0.2s ease, transform 0.15s ease;
+  flex: 0 0 auto;
 
   &:hover {
     background: rgba(0, 0, 0, 0.06);
@@ -80,8 +90,8 @@
 }
 
 .icon {
-  width: 28px;
-  height: 28px;
+  width: 24px;
+  height: 24px;
   object-fit: contain;
 }
 
@@ -110,42 +120,20 @@
   }
 }
 
-// 小屏幕改为底部横向浮层
+// 小屏幕进一步收紧尺寸
 @media (max-width: 1200px) {
   .navContainer {
-    top: auto;
-    right: auto;
-    left: 50%;
-    bottom: calc(12px + env(safe-area-inset-bottom));
-    transform: translateX(-50%);
-    width: fit-content;
-    max-width: calc(100vw - 24px);
+    max-width: calc(100vw - 16px);
   }
 
   .navList {
-    display: inline-flex;
-    flex-direction: row;
     gap: 6px;
     padding: 8px 10px;
-    border-radius: 999px;
-    overflow-x: auto;
-    scrollbar-width: none;
-    max-width: inherit;
-
-    &::-webkit-scrollbar {
-      display: none;
-    }
-  }
-
-  .indicator {
-    border-radius: 999px;
   }
 
   .navItem {
     width: 36px;
     height: 36px;
-    border-radius: 999px;
-    flex: 0 0 auto;
   }
 
   .icon {
diff --git a/src/components/providers/ProviderNav/ProviderNav.tsx b/src/components/providers/ProviderNav/ProviderNav.tsx
index c58c6db..1dd7960 100644
--- a/src/components/providers/ProviderNav/ProviderNav.tsx
+++ b/src/components/providers/ProviderNav/ProviderNav.tsx
@@ -41,6 +41,7 @@ export function ProviderNav() {
   const [activeProvider, setActiveProvider] = useState<ProviderId | null>(null);
   const contentScrollerRef = useRef<HTMLElement | null>(null);
   const navListRef = useRef<HTMLDivElement | null>(null);
+  const navContainerRef = useRef<HTMLDivElement | null>(null);
   const itemRefs = useRef<Record<ProviderId, HTMLButtonElement | null>>({
     gemini: null,
     codex: null,
@@ -170,6 +171,31 @@ export function ProviderNav() {
     updateIndicator(activeProvider);
   }, [activeProvider, shouldShow, updateIndicator]);
 
+  // Expose overlay height to the page, so it can reserve bottom padding and avoid being covered.
+  useLayoutEffect(() => {
+    if (!shouldShow) return;
+
+    const el = navContainerRef.current;
+    if (!el) return;
+
+    const updateHeight = () => {
+      const height = el.getBoundingClientRect().height;
+      document.documentElement.style.setProperty('--provider-nav-height', `${height}px`);
+    };
+
+    updateHeight();
+    window.addEventListener('resize', updateHeight);
+
+    const ro = typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(updateHeight);
+    ro?.observe(el);
+
+    return () => {
+      ro?.disconnect();
+      window.removeEventListener('resize', updateHeight);
+      document.documentElement.style.removeProperty('--provider-nav-height');
+    };
+  }, [shouldShow]);
+
   const scrollToProvider = (providerId: ProviderId) => {
     const container = getScrollContainer();
     const element = document.getElementById(`provider-${providerId}`);
@@ -204,7 +230,7 @@ export function ProviderNav() {
   }, [activeProvider, shouldShow, updateIndicator]);
 
   const navContent = (
-    <div className={styles.navContainer}>
+    <div className={styles.navContainer} ref={navContainerRef}>
       <div className={styles.navList} ref={navListRef}>
         <div
           className={[
diff --git a/src/pages/AiProvidersPage.module.scss b/src/pages/AiProvidersPage.module.scss
index 78f4195..a1be474 100644
--- a/src/pages/AiProvidersPage.module.scss
+++ b/src/pages/AiProvidersPage.module.scss
@@ -27,10 +27,9 @@
   display: flex;
   flex-direction: column;
   gap: $spacing-xl;
-
-  @include mobile {
-    padding-bottom: calc(72px + env(safe-area-inset-bottom));
-  }
+  padding-bottom: calc(
+    var(--provider-nav-height, 60px) + 12px + env(safe-area-inset-bottom) + #{$spacing-md}
+  );
 }
 
 .section {
diff --git a/src/pages/ConfigPage.module.scss b/src/pages/ConfigPage.module.scss
index 3c4841a..1d3386a 100644
--- a/src/pages/ConfigPage.module.scss
+++ b/src/pages/ConfigPage.module.scss
@@ -6,7 +6,9 @@
   display: flex;
   flex-direction: column;
   overflow-y: auto;
-  padding-bottom: calc(var(--config-action-bar-height, 0px) + #{$spacing-lg});
+  padding-bottom: calc(
+    var(--config-action-bar-height, 0px) + 16px + env(safe-area-inset-bottom) + #{$spacing-md}
+  );
 }
 
 .pageTitle {
@@ -315,7 +317,7 @@
 
 .floatingActionContainer {
   position: fixed;
-  left: 50%;
+  left: var(--content-center-x, 50%);
   bottom: calc(16px + env(safe-area-inset-bottom));
   transform: translateX(-50%);
   z-index: 50;
@@ -327,8 +329,8 @@
 .floatingActionList {
   display: inline-flex;
   align-items: center;
-  gap: 10px;
-  padding: 10px 12px;
+  gap: 8px;
+  padding: 8px 10px;
   background: rgba(255, 255, 255, 0.7);
   backdrop-filter: blur(12px);
   -webkit-backdrop-filter: blur(12px);
@@ -345,13 +347,13 @@
 }
 
 .floatingStatus {
-  font-size: 12px;
+  font-size: 11px;
   font-weight: 600;
-  padding: 6px 10px;
+  padding: 5px 8px;
   border-radius: 999px;
   background: rgba(0, 0, 0, 0.06);
   text-align: center;
-  max-width: min(360px, 52vw);
+  max-width: min(280px, 46vw);
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -363,8 +365,8 @@
   display: flex;
   align-items: center;
   justify-content: center;
-  width: 44px;
-  height: 44px;
+  width: 40px;
+  height: 40px;
   border-radius: 999px;
   cursor: pointer;
   color: var(--text-primary);
@@ -388,10 +390,10 @@
 
 .dirtyDot {
   position: absolute;
-  top: 9px;
-  right: 9px;
-  width: 8px;
-  height: 8px;
+  top: 8px;
+  right: 8px;
+  width: 7px;
+  height: 7px;
   border-radius: 999px;
   background: #f59e0b;
   box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.25);
@@ -431,8 +433,8 @@
   }
 
   .floatingActionButton {
-    width: 40px;
-    height: 40px;
+    width: 38px;
+    height: 38px;
     flex: 0 0 auto;
   }
 }
diff --git a/src/pages/ConfigPage.tsx b/src/pages/ConfigPage.tsx
index a2b711a..0d99c9a 100644
--- a/src/pages/ConfigPage.tsx
+++ b/src/pages/ConfigPage.tsx
@@ -300,7 +300,7 @@ export function ConfigPage() {
           title={t('config_management.reload')}
           aria-label={t('config_management.reload')}
         >
-          <IconRefreshCw size={18} />
+          <IconRefreshCw size={16} />
         </button>
         <button
           type="button"
@@ -310,7 +310,7 @@ export function ConfigPage() {
           title={t('config_management.save')}
           aria-label={t('config_management.save')}
         >
-          <IconCheck size={18} />
+          <IconCheck size={16} />
           {isDirty && <span className={styles.dirtyDot} aria-hidden="true" />}
         </button>
       </div>