diff --git a/assets/creator-studio/package-lock.json b/assets/creator-studio/package-lock.json
index e99d4d2a..3dedc485 100644
--- a/assets/creator-studio/package-lock.json
+++ b/assets/creator-studio/package-lock.json
@@ -13,6 +13,7 @@
         "@wordpress/element": "5.8.0",
         "@wordpress/i18n": "4.31.0",
         "@wordpress/scripts": "26.4.0",
+        "jsdom": "20.0.3",
         "sass": "1.77.8",
         "typescript": "5.4.5"
       }
diff --git a/assets/creator-studio/package.json b/assets/creator-studio/package.json
index 9e8d9dfb..c844508a 100644
--- a/assets/creator-studio/package.json
+++ b/assets/creator-studio/package.json
@@ -4,7 +4,8 @@
   "private": true,
   "scripts": {
     "build": "wp-scripts build",
-    "start": "wp-scripts start"
+    "start": "wp-scripts start",
+    "test": "node --test tests/*.test.cjs"
   },
   "devDependencies": {
     "@types/react": "18.3.31",
@@ -12,6 +13,7 @@
     "@wordpress/element": "5.8.0",
     "@wordpress/i18n": "4.31.0",
     "@wordpress/scripts": "26.4.0",
+    "jsdom": "20.0.3",
     "sass": "1.77.8",
     "typescript": "5.4.5"
   }
diff --git a/assets/creator-studio/src/editor-runtime.ts b/assets/creator-studio/src/editor-runtime.ts
index 26156d09..040fb661 100644
--- a/assets/creator-studio/src/editor-runtime.ts
+++ b/assets/creator-studio/src/editor-runtime.ts
@@ -6,77 +6,129 @@
  * @package Jio
  */
 
-/** 结构块（不能从内部被拆开的块）。 */
-const STRUCTURAL_SELECTOR = 'table,pre,hr,.quote_q,.tinymce-hide,.jio-math--block';
+/** 按键删除时作为整体处理的正文顶层块。 */
+const STRUCTURAL_SELECTOR = 'table,pre,hr,figure,ul,ol,.quote_q,.tinymce-hide,.new-dplayer,.wp-block-embed';
+const WRAPPED_MEDIA_SELECTOR = '.jio-math--block,img,iframe,video,audio,.jio-file-link';
+
+function isStructuralBlock(node: Element): boolean {
+	if (node.matches(STRUCTURAL_SELECTOR)) {
+		return true;
+	}
+	if (node.tagName !== 'P') {
+		return false;
+	}
+	const children = Array.from(node.childNodes).filter((child) =>
+		(child.nodeType !== 3 || !!child.textContent?.trim())
+		&& !(child.nodeType === 1 && (child as Element).matches('br[data-mce-bogus]'))
+	);
+	return children.length === 1 && children[0].nodeType === 1
+		&& (children[0] as Element).matches(WRAPPED_MEDIA_SELECTOR);
+}
+
+function isAtEdge(range: Range, container: Element, backward: boolean): boolean {
+	const remainder = range.cloneRange();
+	remainder.selectNodeContents(container);
+	if (backward) {
+		remainder.setEnd(range.startContainer, range.startOffset);
+	} else {
+		remainder.setStart(range.startContainer, range.startOffset);
+	}
+	const content = remainder.cloneContents();
+	return !content.textContent?.trim()
+		&& !content.querySelector('img,iframe,video,audio,table,pre,hr,figure,.jio-math,.jio-footnote-ref,.new-dplayer');
+}
+
+function topLevelBlock(node: Node, body: HTMLElement): Element | null {
+	let current = node.nodeType === 1 ? node as Element : node.parentElement;
+	while (current && current.parentElement !== body) {
+		current = current.parentElement;
+	}
+	return current?.parentElement === body ? current : null;
+}
 
 /**
  * Backspace / Delete 删除相邻的块级元素。
  *
- * 表格、代码块、引用、分割线这类内容不是普通文本，TinyMCE 默认不会在
- * 空段落里按删除键时主动移除它们，导致「删不掉」。这里在光标处于空段落、
- * 且紧邻目标块时直接移除该块。
+ * 光标位于正文块边界时删除相邻的结构块；位于结构块自身的首尾时删除
+ * 整个块。选区中的文字和块内非边界位置交给 TinyMCE 正常处理。
  */
 export function removeAdjacentBlock(editor: any, event: any): void {
-	const key = Number(event.keyCode);
-	if (key !== 8 && key !== 46) {
+	const key = event.key || (event.keyCode === 8 ? 'Backspace' : event.keyCode === 46 ? 'Delete' : '');
+	if ((key !== 'Backspace' && key !== 'Delete') || event.defaultPrevented || event.isComposing
+		|| event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) {
 		return;
 	}
 	const selection = editor.selection;
 	if (!selection || !selection.isCollapsed()) {
 		return;
 	}
-
-	const body = editor.getBody();
-	const block = selection.getNode();
-	const isBlank = (node: any): boolean =>
-		!!node && node.nodeType === 1 && (node.textContent || '').trim() === '' &&
-		!editor.dom.getParent(node, STRUCTURAL_SELECTOR, body);
-	const isBlockElement = (node: any): boolean =>
-		!!node && node.nodeType === 1 && !!(node.matches?.(STRUCTURAL_SELECTOR));
-
-	// 光标可能落在空段落里，也可能落在块级元素的边界（TinyMCE 常见行为）；
-	// 两种情况下都优先删除紧邻的块，而不是让按键悄悄失效。
-	const blankContainer = isBlank(block) ? block : null;
-	const direct = blankContainer
-		? (key === 8 ? blankContainer.previousElementSibling : blankContainer.nextElementSibling)
-		: null;
-
-	if (isBlockElement(direct)) {
-		event.preventDefault();
-		editor.dom.remove(direct);
-		editor.nodeChanged();
-		editor.undoManager.add();
+	const body = editor.getBody() as HTMLElement;
+	const range = selection.getRng() as Range;
+	if (!body || !range || !body.contains(range.startContainer)) {
 		return;
 	}
-
-	// 光标停在块首/块尾时，删除块本身。
-	const caretBlock = editor.dom.getParent(block, STRUCTURAL_SELECTOR, body);
-	if (!caretBlock) {
+	const backward = key === 'Backspace';
+	const current = topLevelBlock(range.startContainer, body);
+	let target: Element | null = null;
+	if (current) {
+		const node = range.startContainer.nodeType === 1
+			? range.startContainer as Element : range.startContainer.parentElement;
+		const nestedEditable = node?.closest('[contenteditable="true"]');
+		const edgeContainer = nestedEditable && current.contains(nestedEditable)
+			? nestedEditable : current;
+		if (!isAtEdge(range, edgeContainer, backward)) {
+			return;
+		}
+		// 表格单元格和列表项的边界键由 TinyMCE 处理。
+		if (current.matches('table,ul,ol')) {
+			return;
+		}
+		target = isStructuralBlock(current)
+			? current : backward ? current.previousElementSibling : current.nextElementSibling;
+	} else if (range.startContainer === body) {
+		let offset = range.startOffset + (backward ? -1 : 0);
+		const step = backward ? -1 : 1;
+		while (body.childNodes[offset]?.nodeType === 3 && !body.childNodes[offset].textContent?.trim()) {
+			offset += step;
+		}
+		target = body.childNodes[offset]?.nodeType === 1 ? body.childNodes[offset] as Element : null;
+	}
+	if (!target || !isStructuralBlock(target)) {
 		return;
 	}
-	const caretIsAtEdge = (start: boolean): boolean => {
-		const probe = editor.dom.createRng();
-		probe.selectNodeContents(caretBlock);
-		probe.collapse(start);
-		const caret = selection.getRng();
-		return caret && typeof caret.compareBoundaryPoints === 'function'
-			&& caret.compareBoundaryPoints(start ? 1 : 3, probe) === 0;
-	};
-
-	if (!((key === 8 && caretIsAtEdge(true)) || (key === 46 && caretIsAtEdge(false)))) {
-		return;
-	}
-
 	event.preventDefault();
-	const parent = caretBlock.parentElement;
-	editor.dom.remove(caretBlock);
-	// 删掉最后一个块后补一个空段落，否则没有可放置光标的位置。
-	if (parent && parent.children.length === 0) {
-		editor.setContent('<p></p>');
-		editor.selection.setCursorLocation(editor.getBody().firstChild, 0);
-	}
+	editor.undoManager.transact(() => {
+		if (target === current) {
+			const previous = target.previousElementSibling;
+			const next = target.nextElementSibling;
+			const destination = backward
+				? [previous, next].find((item) => item && !isStructuralBlock(item))
+				: [next, previous].find((item) => item && !isStructuralBlock(item));
+			if (destination) {
+				editor.dom.remove(target);
+				selection.setCursorLocation(destination, destination === previous ? destination.childNodes.length : 0);
+			} else {
+				const paragraph = body.ownerDocument.createElement('p');
+				paragraph.appendChild(body.ownerDocument.createElement('br'));
+				body.insertBefore(paragraph, target);
+				editor.dom.remove(target);
+				selection.setCursorLocation(paragraph, 0);
+			}
+		} else {
+				const next = target.nextSibling;
+			editor.dom.remove(target);
+			if (!current && !Array.from(body.children).some((child) => !isStructuralBlock(child))) {
+				const paragraph = body.ownerDocument.createElement('p');
+				paragraph.appendChild(body.ownerDocument.createElement('br'));
+					body.insertBefore(paragraph, next);
+				selection.setCursorLocation(paragraph, 0);
+			} else {
+				selection.setRng(range);
+			}
+		}
+	});
 	editor.nodeChanged();
-	editor.undoManager.add();
+	editor.fire('change');
 }
 
 /**
diff --git a/assets/creator-studio/src/styles/_block-tools.scss b/assets/creator-studio/src/styles/_block-tools.scss
index a6555e1f..aeb77253 100644
--- a/assets/creator-studio/src/styles/_block-tools.scss
+++ b/assets/creator-studio/src/styles/_block-tools.scss
@@ -404,11 +404,6 @@
 	}
 }
 
-/*
- * 块级删除控件的样式在 editor-content-style.ts 里：该控件插在 TinyMCE
- * iframe 内部，页面级样式表作用不到。这里不再重复定义。
- */
-
 @media (max-width: 767px) {
 	.jio-creator__status {
 		gap: 8px;
diff --git a/assets/creator-studio/tests/block-deletion.test.cjs b/assets/creator-studio/tests/block-deletion.test.cjs
new file mode 100644
index 00000000..43c6492d
--- /dev/null
+++ b/assets/creator-studio/tests/block-deletion.test.cjs
@@ -0,0 +1,147 @@
+'use strict';
+
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const test = require('node:test');
+const { JSDOM } = require('jsdom');
+const ts = require('typescript');
+
+const source = fs.readFileSync(path.join(__dirname, '../src/editor-runtime.ts'), 'utf8');
+const compiled = ts.transpileModule(source, {
+  compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
+}).outputText;
+const runtime = {};
+new Function('exports', compiled)(runtime);
+const { removeAdjacentBlock } = runtime;
+
+function fixture(html, nodeSelector, offset = 0) {
+  const dom = new JSDOM(`<!doctype html><body contenteditable="true">${html}</body>`);
+  const body = dom.window.document.body;
+  const node = nodeSelector === 'body' ? body : body.querySelector(nodeSelector);
+  let range = dom.window.document.createRange();
+  range.setStart(node, offset);
+  range.collapse(true);
+  const events = [];
+  const editor = {
+    getBody: () => body,
+    selection: {
+      isCollapsed: () => range.collapsed,
+      getRng: () => range,
+      setRng: (next) => { range = next; },
+      setCursorLocation: (target, at) => {
+        range = dom.window.document.createRange();
+        range.setStart(target, at);
+        range.collapse(true);
+      },
+    },
+    dom: { remove: (target) => target.remove() },
+    undoManager: { transact: (action) => { events.push('undo'); action(); } },
+    nodeChanged: () => events.push('node'),
+    fire: (name) => events.push(name),
+  };
+  const press = (key, options = {}) => {
+    const event = {
+      key,
+      prevented: false,
+      preventDefault() { this.prevented = true; },
+      ...options,
+    };
+    removeAdjacentBlock(editor, event);
+    return event;
+  };
+  return { body, editor, events, press };
+}
+
+test('Backspace deletes the adjacent table from a paragraph boundary and records one edit', () => {
+  const f = fixture('<table><tbody><tr><td>data</td></tr></tbody></table><p><strong>after</strong></p>', 'strong', 0);
+  const event = f.press('Backspace');
+  assert.equal(event.prevented, true);
+  assert.equal(f.body.innerHTML, '<p><strong>after</strong></p>');
+  assert.deepEqual(f.events, ['undo', 'node', 'change']);
+});
+
+test('Delete removes a following list only at the end of ordinary text', () => {
+  const f = fixture('<p>before</p><ul><li>item</li></ul>', 'p', 0);
+  f.editor.selection.setCursorLocation(f.body.querySelector('p').firstChild, 1);
+  assert.equal(f.press('Delete').prevented, false);
+  assert.equal(f.body.querySelectorAll('ul').length, 1);
+  f.editor.selection.setCursorLocation(f.body.querySelector('p').firstChild, 6);
+  assert.equal(f.press('Delete').prevented, true);
+  assert.equal(f.body.innerHTML, '<p>before</p>');
+});
+
+test('a displayed formula is removed with its paragraph wrapper', () => {
+  const f = fixture('<p><span class="jio-math jio-math--block" contenteditable="false">x</span><br data-mce-bogus="1"></p><p>next</p>', 'p', 0);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.innerHTML, '<p>next</p>');
+  assert.equal(f.editor.selection.getRng().startContainer, f.body.querySelector('p'));
+});
+
+test('nested quote and hidden-content editing boundaries remove the whole outer block', () => {
+  for (const html of [
+    '<div class="quote_q" contenteditable="false"><div contenteditable="true"><p>quote</p></div></div>',
+    '<div class="tinymce-hide"><p class="hide-before">[vip]</p><div contenteditable="true"><p>secret</p></div><p class="hide-after">[/vip]</p></div>',
+  ]) {
+    const f = fixture(`${html}<p>next</p>`, '[contenteditable="true"] p', 0);
+    assert.equal(f.press('Backspace').prevented, true);
+    assert.equal(f.body.innerHTML, '<p>next</p>');
+  }
+});
+
+test('deleting the last structure creates an editable caret home without resetting content', () => {
+  const f = fixture('<pre>code</pre>', 'pre', 0);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.children.length, 1);
+  assert.equal(f.body.firstElementChild.tagName, 'P');
+  assert.equal(f.editor.selection.getRng().startContainer, f.body.firstElementChild);
+});
+
+test('body-level caret can delete an adjacent divider', () => {
+  const f = fixture('<hr><p>after</p>', 'body', 1);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.innerHTML, '<p>after</p>');
+});
+
+test('body-level deletion of the only divider leaves a caret home', () => {
+  const f = fixture('<hr>', 'body', 1);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.firstElementChild.tagName, 'P');
+  assert.equal(f.editor.selection.getRng().startContainer, f.body.firstElementChild);
+});
+
+test('body-level deletion places the caret before the next structural block', () => {
+  const f = fixture('<hr><pre>code</pre>', 'body', 1);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.firstElementChild.tagName, 'P');
+  assert.equal(f.body.lastElementChild.tagName, 'PRE');
+  assert.equal(f.editor.selection.getRng().startContainer, f.body.firstElementChild);
+});
+
+test('media-only paragraphs are removed with their media', () => {
+  const f = fixture('<p><img src="example.jpg"><br data-mce-bogus="1"></p><p>next</p>', 'p', 0);
+  assert.equal(f.press('Backspace').prevented, true);
+  assert.equal(f.body.innerHTML, '<p>next</p>');
+});
+
+test('editing inside a table or list keeps the native key behavior', () => {
+  for (const html of [
+    '<table><tbody><tr><td>cell</td></tr></tbody></table>',
+    '<ul><li>item</li></ul>',
+  ]) {
+    const f = fixture(html, html.startsWith('<table>') ? 'td' : 'li', 0);
+    assert.equal(f.press('Backspace').prevented, false);
+    assert.equal(f.body.firstElementChild.outerHTML, html);
+  }
+});
+
+test('selection and modified keys are left to native editing', () => {
+  const f = fixture('<hr><p>after</p>', 'p', 0);
+  assert.equal(f.press('Backspace', { ctrlKey: true }).prevented, false);
+  assert.equal(f.press('Backspace', { isComposing: true }).prevented, false);
+  const range = f.editor.selection.getRng();
+  range.selectNodeContents(f.body.querySelector('p'));
+  assert.equal(f.press('Backspace').prevented, false);
+  assert.equal(f.body.querySelectorAll('hr').length, 1);
+  assert.deepEqual(f.events, []);
+});