diff --git a/docs/README.md b/docs/README.md
index 26f01f613..e991bca52 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -34,6 +34,8 @@ Expo React Native 移动壳和 Tauri 桌面壳的工程结构、同源 WebView 
 
 图片画布生成类面板的模型泥点默认 JSON、运行时 override、后台“模型定价”页面和主站动态下发口径见 [【编辑器】模型定价配置管理方案-2026-06-22.md](./%E3%80%90%E7%BC%96%E8%BE%91%E5%99%A8%E3%80%91%E6%A8%A1%E5%9E%8B%E5%AE%9A%E4%BB%B7%E9%85%8D%E7%BD%AE%E7%AE%A1%E7%90%86%E6%96%B9%E6%A1%88-2026-06-22.md)。
 
+桌面端全站客服悬浮入口的全局接入点、固定层级、拖拽边界和移动端隐藏口径见 [【前端架构】全站客服悬浮入口接入约定-2026-06-23.md](./technical/%E3%80%90%E5%89%8D%E7%AB%AF%E6%9E%B6%E6%9E%84%E3%80%91%E5%85%A8%E7%AB%99%E5%AE%A2%E6%9C%8D%E6%82%AC%E6%B5%AE%E5%85%A5%E5%8F%A3%E6%8E%A5%E5%85%A5%E7%BA%A6%E5%AE%9A-2026-06-23.md)。
+
 桌面端 `/creation` 创作工具主页、顶级“草稿”入口替换为“项目”、最近项目、新建项目和陶泥儿精选素材瀑布流的落地计划见 [【玩法创作】创作主页与项目入口改版计划-2026-06-18.md](./%E3%80%90%E7%8E%A9%E6%B3%95%E5%88%9B%E4%BD%9C%E3%80%91%E5%88%9B%E4%BD%9C%E4%B8%BB%E9%A1%B5%E4%B8%8E%E9%A1%B9%E7%9B%AE%E5%85%A5%E5%8F%A3%E6%94%B9%E7%89%88%E8%AE%A1%E5%88%92-2026-06-18.md)。
 
 本地通过 SSH alias 管理多台服务器、查看硬件 / systemd / HTTP 健康状态并执行受控服务启停的 egui 桌面工具见 [【开发运维】本地SSH服务器管理面板技术方案-2026-06-11.md](./technical/【开发运维】本地SSH服务器管理面板技术方案-2026-06-11.md)。
diff --git a/docs/technical/【前端架构】全站客服悬浮入口接入约定-2026-06-23.md b/docs/technical/【前端架构】全站客服悬浮入口接入约定-2026-06-23.md
new file mode 100644
index 000000000..90064e199
--- /dev/null
+++ b/docs/technical/【前端架构】全站客服悬浮入口接入约定-2026-06-23.md
@@ -0,0 +1,36 @@
+# 全站客服悬浮入口接入约定
+
+日期：2026-06-23
+
+## 背景
+
+主站需要在桌面端每个页面提供稳定可见的客服入口，包括 `/editor/canvas` 这类全屏画布页面。入口使用陶泥儿客服形象图片，不进入具体业务页布局，避免被滚动、画布缩放或面板层级影响。
+
+## 接入口
+
+- 全局 React 入口为 `src/components/common/FloatingFeedbackEntry.tsx`。
+- 在 `src/main.tsx` 的 `RouteImageReadyGate` 内、当前路由组件之后渲染，覆盖主站 `resolveAppRoute` 管理的所有页面。
+- 图片资产放在 `public/branding/taonier-feedback-entry.png`，并通过 `BRAND_ASSETS.taonierFeedbackEntry` 引用。
+- 悬浮层样式使用 `.floating-feedback-entry`，通过 `position: fixed` 和最高层级保持在页面最上方。
+
+## 交互约定
+
+- 仅桌面端展示，媒体查询为 `(min-width: 1024px)`；移动端不渲染入口。
+- 初始位置靠近页面左下角，随窗口滚动保持固定。
+- 用户可以按住拖动，拖拽过程中实时夹在当前 viewport 内，保证图片完整可见，不被窗口边界遮挡。
+- 窗口尺寸变化后重新夹取当前位置，避免缩小窗口后入口跑出视口。
+- 点击入口使用新页面打开客服表单：
+
+```text
+https://kcnz41bksl1c.feishu.cn/share/base/form/shrcn1p9WpuZMDxrI5ysLLJhw7k
+```
+
+- 拖拽释放后短时间内的补发 click 会被吞掉，避免用户拖动入口时误打开表单。
+
+## 验收口径
+
+- 桌面端主站任意路由均能看到客服入口，画布页也可见。
+- 滚动页面时入口位置相对视口不变。
+- 拖到窗口四边时入口完整留在可见区域内。
+- 移动端视口不渲染入口。
+- 单击入口新开页面跳转到飞书表单。
diff --git a/public/branding/taonier-feedback-entry.png b/public/branding/taonier-feedback-entry.png
new file mode 100644
index 000000000..9699f2918
Binary files /dev/null and b/public/branding/taonier-feedback-entry.png differ
diff --git a/public/branding/taonier-feedback-qq.png b/public/branding/taonier-feedback-qq.png
new file mode 100644
index 000000000..be160c73a
Binary files /dev/null and b/public/branding/taonier-feedback-qq.png differ
diff --git a/public/branding/taonier-feedback-wechat.png b/public/branding/taonier-feedback-wechat.png
new file mode 100644
index 000000000..4210f0952
Binary files /dev/null and b/public/branding/taonier-feedback-wechat.png differ
diff --git a/src/components/common/FloatingFeedbackEntry.test.tsx b/src/components/common/FloatingFeedbackEntry.test.tsx
new file mode 100644
index 000000000..2f39ea107
--- /dev/null
+++ b/src/components/common/FloatingFeedbackEntry.test.tsx
@@ -0,0 +1,193 @@
+/* @vitest-environment jsdom */
+
+import { fireEvent, render, screen } from '@testing-library/react';
+import { afterEach, expect, test, vi } from 'vitest';
+
+import { FloatingFeedbackEntry } from './FloatingFeedbackEntry';
+import {
+  clampFloatingFeedbackPosition,
+  FLOATING_FEEDBACK_FORM_URL,
+  resolveFloatingFeedbackContactPanelOffset,
+  resolveInitialFloatingFeedbackPosition,
+} from './floatingFeedbackEntryModel';
+
+function mockMatchMedia(matches: boolean) {
+  Object.defineProperty(window, 'matchMedia', {
+    configurable: true,
+    writable: true,
+    value: vi.fn().mockImplementation((query: string) => ({
+      matches,
+      media: query,
+      onchange: null,
+      addEventListener: vi.fn(),
+      removeEventListener: vi.fn(),
+      addListener: vi.fn(),
+      removeListener: vi.fn(),
+      dispatchEvent: vi.fn(),
+    })),
+  });
+}
+
+function mockViewport(width: number, height: number) {
+  Object.defineProperty(window, 'innerWidth', {
+    configurable: true,
+    writable: true,
+    value: width,
+  });
+  Object.defineProperty(window, 'innerHeight', {
+    configurable: true,
+    writable: true,
+    value: height,
+  });
+}
+
+afterEach(() => {
+  document.body.innerHTML = '';
+  vi.restoreAllMocks();
+});
+
+test('desktop renders floating feedback entry near lower left', () => {
+  mockMatchMedia(true);
+  mockViewport(1440, 900);
+
+  render(<FloatingFeedbackEntry />);
+
+  const button = screen.getByRole('button', { name: '反馈点我' });
+  const shell = button.closest('.floating-feedback-entry-shell') as HTMLElement;
+  expect(button.className).toContain('floating-feedback-entry');
+  expect(shell.style.left).toBe('24px');
+  expect(shell.style.top).toBe('746.4px');
+  expect(button.querySelector('img')?.getAttribute('src')).toBe(
+    '/branding/taonier-feedback-entry.png',
+  );
+});
+
+test('hover shows contact QR images and mouse leave hides them', () => {
+  mockMatchMedia(true);
+  mockViewport(1440, 900);
+
+  render(<FloatingFeedbackEntry />);
+
+  const button = screen.getByRole('button', { name: '反馈点我' });
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).toBeNull();
+
+  fireEvent.pointerEnter(button);
+
+  const panel = document.querySelector('.floating-feedback-entry-contact-panel');
+  expect(panel).not.toBeNull();
+  expect(
+    (panel as HTMLElement).style.getPropertyValue(
+      '--floating-feedback-contact-offset',
+    ),
+  ).toBe('141.2px');
+  const images = Array.from(panel?.querySelectorAll('img') ?? []);
+  expect(images.map((image) => image.getAttribute('src'))).toEqual([
+    '/branding/taonier-feedback-qq.png',
+    '/branding/taonier-feedback-wechat.png',
+  ]);
+
+  fireEvent.pointerLeave(button);
+
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).toBeNull();
+});
+
+test('mobile does not render feedback entry', () => {
+  mockMatchMedia(false);
+  mockViewport(390, 780);
+
+  render(<FloatingFeedbackEntry />);
+
+  expect(screen.queryByRole('button', { name: '反馈点我' })).toBeNull();
+});
+
+test('click opens feedback form in a new page', () => {
+  mockMatchMedia(true);
+  mockViewport(1440, 900);
+  const openSpy = vi.spyOn(window, 'open').mockReturnValue(null);
+
+  render(<FloatingFeedbackEntry />);
+
+  fireEvent.click(screen.getByRole('button', { name: '反馈点我' }));
+
+  expect(openSpy).toHaveBeenCalledWith(
+    FLOATING_FEEDBACK_FORM_URL,
+    '_blank',
+    'noopener,noreferrer',
+  );
+});
+
+test('hover contact panel does not block click opening feedback form', () => {
+  mockMatchMedia(true);
+  mockViewport(1440, 900);
+  const openSpy = vi.spyOn(window, 'open').mockReturnValue(null);
+
+  render(<FloatingFeedbackEntry />);
+
+  const button = screen.getByRole('button', { name: '反馈点我' });
+  fireEvent.pointerEnter(button);
+  fireEvent.click(button);
+
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).not.toBeNull();
+  expect(openSpy).toHaveBeenCalledWith(
+    FLOATING_FEEDBACK_FORM_URL,
+    '_blank',
+    'noopener,noreferrer',
+  );
+});
+
+test('drag keeps entry fully inside the viewport and does not open form', () => {
+  mockMatchMedia(true);
+  mockViewport(360, 320);
+  const openSpy = vi.spyOn(window, 'open').mockReturnValue(null);
+
+  render(<FloatingFeedbackEntry />);
+
+  const button = screen.getByRole('button', { name: '反馈点我' });
+  fireEvent.mouseEnter(button);
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).not.toBeNull();
+  fireEvent.mouseDown(button, {
+    button: 0,
+    clientX: 40,
+    clientY: 220,
+  });
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).toBeNull();
+  fireEvent.mouseMove(window, {
+    clientX: 900,
+    clientY: 900,
+  });
+  fireEvent.mouseUp(window, {
+    clientX: 900,
+    clientY: 900,
+  });
+  expect(document.querySelector('.floating-feedback-entry-contact-panel')).not.toBeNull();
+  fireEvent.click(button);
+
+  const shell = button.closest('.floating-feedback-entry-shell') as HTMLElement;
+  expect(shell.style.left).toBe('282.4px');
+  expect(shell.style.top).toBe('242.4px');
+  expect(openSpy).not.toHaveBeenCalled();
+});
+
+test('floating feedback position helpers clamp to visible viewport', () => {
+  expect(
+    clampFloatingFeedbackPosition(
+      { left: -100, top: 1000 },
+      { width: 360, height: 320 },
+    ),
+  ).toEqual({ left: 20, top: 242.4 });
+  expect(
+    resolveInitialFloatingFeedbackPosition({ width: 1440, height: 900 }),
+  ).toEqual({ left: 24, top: 746.4 });
+  expect(
+    resolveFloatingFeedbackContactPanelOffset(
+      { left: 20, top: 100 },
+      { width: 1440 },
+    ),
+  ).toBe(145.2);
+  expect(
+    resolveFloatingFeedbackContactPanelOffset(
+      { left: 20, top: 100 },
+      { width: 360 },
+    ),
+  ).toBe(0);
+});
diff --git a/src/components/common/FloatingFeedbackEntry.tsx b/src/components/common/FloatingFeedbackEntry.tsx
new file mode 100644
index 000000000..84b89e8ec
--- /dev/null
+++ b/src/components/common/FloatingFeedbackEntry.tsx
@@ -0,0 +1,336 @@
+import {
+  type CSSProperties,
+  type MouseEvent,
+  type PointerEvent,
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import { createPortal } from 'react-dom';
+
+import { BRAND_ASSETS } from '../../uiAssets';
+import {
+  clampFloatingFeedbackPosition,
+  FLOATING_FEEDBACK_DESKTOP_QUERY,
+  FLOATING_FEEDBACK_DRAG_CLICK_SUPPRESS_MS,
+  FLOATING_FEEDBACK_DRAG_CLICK_THRESHOLD,
+  FLOATING_FEEDBACK_FORM_URL,
+  FLOATING_FEEDBACK_INITIAL_LEFT,
+  FLOATING_FEEDBACK_MARGIN,
+  type FloatingFeedbackPosition,
+  resolveFloatingFeedbackContactPanelOffset,
+  resolveInitialFloatingFeedbackPosition,
+} from './floatingFeedbackEntryModel';
+
+type FloatingFeedbackDragState = {
+  pointerId: number;
+  source: 'mouse' | 'pointer';
+  startClientX: number;
+  startClientY: number;
+  startLeft: number;
+  startTop: number;
+  hasMoved: boolean;
+};
+
+function isSameFloatingFeedbackPointer(
+  currentPointerId: number,
+  nextPointerId: number,
+) {
+  if (!Number.isFinite(currentPointerId) || !Number.isFinite(nextPointerId)) {
+    return true;
+  }
+
+  return currentPointerId === nextPointerId;
+}
+
+function shouldUseMouseDragFallback() {
+  return (
+    typeof window !== 'undefined' &&
+    typeof window.PointerEvent !== 'function'
+  );
+}
+
+function getViewportSize() {
+  return {
+    width: window.innerWidth || document.documentElement.clientWidth,
+    height: window.innerHeight || document.documentElement.clientHeight,
+  };
+}
+
+function getInitialDesktopVisibility() {
+  if (
+    typeof window === 'undefined' ||
+    typeof window.matchMedia !== 'function'
+  ) {
+    return false;
+  }
+
+  return window.matchMedia(FLOATING_FEEDBACK_DESKTOP_QUERY).matches;
+}
+
+export function FloatingFeedbackEntry() {
+  const [isDesktopVisible, setIsDesktopVisible] = useState(
+    getInitialDesktopVisibility,
+  );
+  const [isPointerOverEntry, setIsPointerOverEntry] = useState(false);
+  const [isDragging, setIsDragging] = useState(false);
+  const [position, setPosition] = useState<FloatingFeedbackPosition>(() =>
+    typeof window === 'undefined'
+      ? { left: FLOATING_FEEDBACK_INITIAL_LEFT, top: FLOATING_FEEDBACK_MARGIN }
+      : resolveInitialFloatingFeedbackPosition(getViewportSize()),
+  );
+  const dragStateRef = useRef<FloatingFeedbackDragState | null>(null);
+  const suppressClickUntilRef = useRef(0);
+
+  useEffect(() => {
+    if (
+      typeof window === 'undefined' ||
+      typeof window.matchMedia !== 'function'
+    ) {
+      return;
+    }
+
+    const mediaQuery = window.matchMedia(FLOATING_FEEDBACK_DESKTOP_QUERY);
+    const updateVisibility = (event?: MediaQueryListEvent) => {
+      setIsDesktopVisible(event?.matches ?? mediaQuery.matches);
+    };
+
+    updateVisibility();
+
+    if (typeof mediaQuery.addEventListener === 'function') {
+      mediaQuery.addEventListener('change', updateVisibility);
+      return () => mediaQuery.removeEventListener('change', updateVisibility);
+    }
+
+    mediaQuery.addListener(updateVisibility);
+    return () => mediaQuery.removeListener(updateVisibility);
+  }, []);
+
+  useEffect(() => {
+    const clampToViewport = () => {
+      setPosition((current) =>
+        clampFloatingFeedbackPosition(current, getViewportSize()),
+      );
+    };
+
+    window.addEventListener('resize', clampToViewport);
+    return () => window.removeEventListener('resize', clampToViewport);
+  }, []);
+
+  const updateDrag = (
+    pointerId: number,
+    source: FloatingFeedbackDragState['source'],
+    clientX: number,
+    clientY: number,
+  ) => {
+    const dragState = dragStateRef.current;
+    if (
+      !dragState ||
+      dragState.source !== source ||
+      !isSameFloatingFeedbackPointer(dragState.pointerId, pointerId)
+    ) {
+      return;
+    }
+
+    const deltaX = clientX - dragState.startClientX;
+    const deltaY = clientY - dragState.startClientY;
+    if (
+      !dragState.hasMoved &&
+      Math.hypot(deltaX, deltaY) >= FLOATING_FEEDBACK_DRAG_CLICK_THRESHOLD
+    ) {
+      dragState.hasMoved = true;
+    }
+
+    setPosition(
+      clampFloatingFeedbackPosition(
+        {
+          left: dragState.startLeft + deltaX,
+          top: dragState.startTop + deltaY,
+        },
+        getViewportSize(),
+      ),
+    );
+  };
+
+  const stopDragById = (
+    pointerId: number,
+    source: FloatingFeedbackDragState['source'],
+  ) => {
+    const dragState = dragStateRef.current;
+    if (
+      !dragState ||
+      dragState.source !== source ||
+      !isSameFloatingFeedbackPointer(dragState.pointerId, pointerId)
+    ) {
+      return;
+    }
+
+    suppressClickUntilRef.current = dragState.hasMoved
+      ? Date.now() + FLOATING_FEEDBACK_DRAG_CLICK_SUPPRESS_MS
+      : 0;
+    dragStateRef.current = null;
+    setIsDragging(false);
+  };
+
+  useEffect(() => {
+    const handlePointerMove = (event: globalThis.PointerEvent) => {
+      const dragState = dragStateRef.current;
+      if (
+        !dragState ||
+        !isSameFloatingFeedbackPointer(dragState.pointerId, event.pointerId)
+      ) {
+        return;
+      }
+
+      updateDrag(event.pointerId, 'pointer', event.clientX, event.clientY);
+    };
+
+    const stopPointerDrag = (event: globalThis.PointerEvent) => {
+      stopDragById(event.pointerId, 'pointer');
+    };
+
+    window.addEventListener('pointermove', handlePointerMove);
+    window.addEventListener('pointerup', stopPointerDrag);
+    window.addEventListener('pointercancel', stopPointerDrag);
+    return () => {
+      window.removeEventListener('pointermove', handlePointerMove);
+      window.removeEventListener('pointerup', stopPointerDrag);
+      window.removeEventListener('pointercancel', stopPointerDrag);
+    };
+  }, []);
+
+  useEffect(() => {
+    const handleMouseMove = (event: globalThis.MouseEvent) => {
+      const dragState = dragStateRef.current;
+      if (!dragState || dragState.source !== 'mouse') {
+        return;
+      }
+
+      updateDrag(Number.NaN, 'mouse', event.clientX, event.clientY);
+    };
+
+    const stopMouseDrag = () => {
+      stopDragById(Number.NaN, 'mouse');
+    };
+
+    window.addEventListener('mousemove', handleMouseMove);
+    window.addEventListener('mouseup', stopMouseDrag);
+    return () => {
+      window.removeEventListener('mousemove', handleMouseMove);
+      window.removeEventListener('mouseup', stopMouseDrag);
+    };
+  }, []);
+
+  const startPointerDrag = (event: PointerEvent<HTMLButtonElement>) => {
+    if (event.button > 0) {
+      return;
+    }
+
+    event.currentTarget.setPointerCapture?.(event.pointerId);
+    setIsDragging(true);
+    dragStateRef.current = {
+      pointerId: event.pointerId,
+      source: 'pointer',
+      startClientX: event.clientX,
+      startClientY: event.clientY,
+      startLeft: position.left,
+      startTop: position.top,
+      hasMoved: false,
+    };
+  };
+
+  const startMouseDrag = (event: MouseEvent<HTMLButtonElement>) => {
+    if (!shouldUseMouseDragFallback() || event.button > 0) {
+      return;
+    }
+
+    setIsDragging(true);
+    dragStateRef.current = {
+      pointerId: Number.NaN,
+      source: 'mouse',
+      startClientX: event.clientX,
+      startClientY: event.clientY,
+      startLeft: position.left,
+      startTop: position.top,
+      hasMoved: false,
+    };
+  };
+
+  const openFeedbackForm = () => {
+    if (suppressClickUntilRef.current >= Date.now()) {
+      suppressClickUntilRef.current = 0;
+      dragStateRef.current = null;
+      return;
+    }
+
+    window.open(FLOATING_FEEDBACK_FORM_URL, '_blank', 'noopener,noreferrer');
+  };
+
+  if (!isDesktopVisible || typeof document === 'undefined') {
+    return null;
+  }
+
+  const shouldShowContactPanel = isPointerOverEntry && !isDragging;
+  const contactPanelOffset = resolveFloatingFeedbackContactPanelOffset(
+    position,
+    getViewportSize(),
+  );
+
+  return createPortal(
+    <div
+      className="floating-feedback-entry-shell"
+      style={{
+        left: `${position.left}px`,
+        top: `${position.top}px`,
+      }}
+    >
+      {shouldShowContactPanel ? (
+        <div
+          className="floating-feedback-entry-contact-panel"
+          style={
+            {
+              '--floating-feedback-contact-offset': `${contactPanelOffset}px`,
+            } as CSSProperties
+          }
+          aria-hidden="true"
+        >
+          <img
+            src={BRAND_ASSETS.taonierFeedbackQq}
+            alt=""
+            draggable={false}
+          />
+          <img
+            src={BRAND_ASSETS.taonierFeedbackWechat}
+            alt=""
+            draggable={false}
+          />
+        </div>
+      ) : null}
+      <button
+        type="button"
+        className="floating-feedback-entry"
+        aria-label="反馈点我"
+        onPointerEnter={() => setIsPointerOverEntry(true)}
+        onPointerLeave={() => setIsPointerOverEntry(false)}
+        onPointerDown={startPointerDrag}
+        onMouseEnter={() => setIsPointerOverEntry(true)}
+        onMouseLeave={() => setIsPointerOverEntry(false)}
+        onMouseDown={startMouseDrag}
+        onPointerMove={(event) =>
+          updateDrag(event.pointerId, 'pointer', event.clientX, event.clientY)
+        }
+        onPointerUp={(event) => stopDragById(event.pointerId, 'pointer')}
+        onPointerCancel={(event) => stopDragById(event.pointerId, 'pointer')}
+        onClick={openFeedbackForm}
+      >
+        <img
+          src={BRAND_ASSETS.taonierFeedbackEntry}
+          alt=""
+          aria-hidden="true"
+          draggable={false}
+        />
+      </button>
+    </div>,
+    document.body,
+  );
+}
diff --git a/src/components/common/floatingFeedbackEntryModel.ts b/src/components/common/floatingFeedbackEntryModel.ts
new file mode 100644
index 000000000..a45100f8d
--- /dev/null
+++ b/src/components/common/floatingFeedbackEntryModel.ts
@@ -0,0 +1,81 @@
+export const FLOATING_FEEDBACK_FORM_URL =
+  'https://kcnz41bksl1c.feishu.cn/share/base/form/shrcn1p9WpuZMDxrI5ysLLJhw7k';
+
+export const FLOATING_FEEDBACK_DESKTOP_QUERY = '(min-width: 1024px)';
+export const FLOATING_FEEDBACK_SIZE = 57.6;
+export const FLOATING_FEEDBACK_MARGIN = 20;
+export const FLOATING_FEEDBACK_INITIAL_LEFT = 24;
+export const FLOATING_FEEDBACK_INITIAL_BOTTOM = 96;
+export const FLOATING_FEEDBACK_DRAG_CLICK_THRESHOLD = 4;
+export const FLOATING_FEEDBACK_DRAG_CLICK_SUPPRESS_MS = 250;
+export const FLOATING_FEEDBACK_CONTACT_PANEL_WIDTH = 348;
+
+export type FloatingFeedbackPosition = {
+  left: number;
+  top: number;
+};
+
+function roundFloatingFeedbackCoordinate(value: number) {
+  return Math.round(value * 10) / 10;
+}
+
+export function clampFloatingFeedbackPosition(
+  position: FloatingFeedbackPosition,
+  viewport: { width: number; height: number },
+) {
+  const minLeft = FLOATING_FEEDBACK_MARGIN;
+  const minTop = FLOATING_FEEDBACK_MARGIN;
+  const maxLeft = Math.max(
+    minLeft,
+    viewport.width - FLOATING_FEEDBACK_SIZE - FLOATING_FEEDBACK_MARGIN,
+  );
+  const maxTop = Math.max(
+    minTop,
+    viewport.height - FLOATING_FEEDBACK_SIZE - FLOATING_FEEDBACK_MARGIN,
+  );
+
+  return {
+    left: roundFloatingFeedbackCoordinate(
+      Math.min(maxLeft, Math.max(minLeft, position.left)),
+    ),
+    top: roundFloatingFeedbackCoordinate(
+      Math.min(maxTop, Math.max(minTop, position.top)),
+    ),
+  };
+}
+
+export function resolveInitialFloatingFeedbackPosition(viewport: {
+  width: number;
+  height: number;
+}) {
+  return clampFloatingFeedbackPosition(
+    {
+      left: FLOATING_FEEDBACK_INITIAL_LEFT,
+      top:
+        viewport.height -
+        FLOATING_FEEDBACK_SIZE -
+        FLOATING_FEEDBACK_INITIAL_BOTTOM,
+    },
+    viewport,
+  );
+}
+
+export function resolveFloatingFeedbackContactPanelOffset(
+  position: FloatingFeedbackPosition,
+  viewport: { width: number },
+) {
+  const entryCenter = position.left + FLOATING_FEEDBACK_SIZE / 2;
+  const minCenter = FLOATING_FEEDBACK_MARGIN + FLOATING_FEEDBACK_CONTACT_PANEL_WIDTH / 2;
+  const maxCenter =
+    viewport.width -
+    FLOATING_FEEDBACK_MARGIN -
+    FLOATING_FEEDBACK_CONTACT_PANEL_WIDTH / 2;
+
+  if (maxCenter < minCenter) {
+    return 0;
+  }
+
+  return roundFloatingFeedbackCoordinate(
+    Math.min(maxCenter, Math.max(minCenter, entryCenter)) - entryCenter,
+  );
+}
diff --git a/src/index.css b/src/index.css
index 283343c15..d1a7c607a 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1562,6 +1562,75 @@ html[data-mobile-keyboard-open='true'] #root {
   color: var(--platform-brand-logo-subtitle);
 }
 
+.floating-feedback-entry-shell {
+  position: fixed;
+  z-index: 2147483647;
+  width: 57.6px;
+  height: 57.6px;
+}
+
+.floating-feedback-entry-contact-panel {
+  position: absolute;
+  left: 50%;
+  bottom: calc(100% + 12px);
+  display: flex;
+  box-sizing: border-box;
+  width: 348px;
+  gap: 12px;
+  align-items: center;
+  justify-content: center;
+  padding: 10px;
+  border: 1px solid rgba(214, 154, 111, 0.24);
+  border-radius: 12px;
+  background: rgba(255, 252, 248, 0.97);
+  box-shadow: 0 18px 36px rgba(74, 34, 15, 0.18);
+  pointer-events: none;
+  transform: translateX(calc(-50% + var(--floating-feedback-contact-offset, 0px)));
+}
+
+.floating-feedback-entry-contact-panel img {
+  display: block;
+  width: 156px;
+  height: 156px;
+  border-radius: 8px;
+  object-fit: contain;
+  user-select: none;
+}
+
+.floating-feedback-entry {
+  position: relative;
+  display: inline-flex;
+  width: 57.6px;
+  height: 57.6px;
+  align-items: center;
+  justify-content: center;
+  border: 0;
+  border-radius: 999px;
+  background: transparent;
+  padding: 0;
+  cursor: grab;
+  touch-action: none;
+  user-select: none;
+  filter: drop-shadow(0 0.7rem 1.05rem rgba(98, 48, 24, 0.24));
+}
+
+.floating-feedback-entry:active {
+  cursor: grabbing;
+}
+
+.floating-feedback-entry:focus-visible {
+  outline: 3px solid rgba(204, 117, 76, 0.72);
+  outline-offset: 4px;
+}
+
+.floating-feedback-entry img {
+  display: block;
+  width: 100%;
+  height: 100%;
+  pointer-events: none;
+  user-select: none;
+}
+
 .platform-main-shell {
   position: relative;
   width: 100%;
diff --git a/src/main.tsx b/src/main.tsx
index 17fd6ac8e..c730f9992 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -5,6 +5,7 @@ import './index.css';
 import {StrictMode, Suspense} from 'react';
 import {createRoot} from 'react-dom/client';
 
+import {FloatingFeedbackEntry} from './components/common/FloatingFeedbackEntry';
 import {stabilizeMobileViewportKeyboardFocus} from './mobileViewportKeyboardFocus';
 import {lockMobileViewportZoom} from './mobileViewportZoomLock';
 import {resolveAppRoute} from './routing/appRoutes';
@@ -54,5 +55,6 @@ root.render(
         <RouteComponent {...(route.componentProps ?? {})} />
       </RouteImageReadyGate>
     </Suspense>
+    <FloatingFeedbackEntry />
   </StrictMode>,
 );
diff --git a/src/uiAssets.ts b/src/uiAssets.ts
index eca2ada6d..2b2267291 100644
--- a/src/uiAssets.ts
+++ b/src/uiAssets.ts
@@ -54,6 +54,9 @@ export const CUSTOM_WORLD_THEME_ICONS = {
 export const BRAND_ASSETS = {
   kuranGamesLogo: '/branding/kuran-games-logo.svg',
   taonierProductIp: '/branding/taonier-product-ip.png',
+  taonierFeedbackEntry: '/branding/taonier-feedback-entry.png',
+  taonierFeedbackQq: '/branding/taonier-feedback-qq.png',
+  taonierFeedbackWechat: '/branding/taonier-feedback-wechat.png',
 } as const;
 
 export const UI_CHROME = {