diff --git a/assets/webui/index.html b/assets/webui/index.html
index f3b46fa..7bee97c 100644
--- a/assets/webui/index.html
+++ b/assets/webui/index.html
@@ -272,11 +272,11 @@
 					<div class="form-row"><label for="structureName">名称</label><input id="structureName" type="text" required></div>
 					<div class="form-row"><label for="structureNamespace">命名空间</label><input id="structureNamespace" type="text"></div>
 					<div class="form-row"><label for="structureText">内容</label><textarea id="structureText" rows="2"></textarea></div>
-					<div class="panel-row"><span>属性</span><button id="structureAttributeAdd" class="small-button" type="button" title="添加属性">添加</button></div>
+					<div class="panel-row"><span>属性</span><button id="structureAttributeAdd" class="icon-button" type="button" title="添加属性" aria-label="添加属性">+</button></div>
 					<div id="structureAttributes" class="structure-edit-list"></div>
 				</div>
 				<div id="structureBinding" hidden>
-					<div class="panel-row"><span>引用</span><div class="panel-actions"><button id="structureSelection" class="small-button" type="button" title="绑定选区">选区</button><button id="structureReferenceAdd" class="small-button" type="button" title="添加引用">添加</button></div></div>
+					<div class="panel-row"><span>引用</span><div class="panel-actions"><button id="structureSelection" class="button" type="button" title="绑定选区" aria-label="绑定选区">选区</button><button id="structureReferenceAdd" class="icon-button" type="button" title="添加引用" aria-label="添加引用">+</button></div></div>
 					<div id="structureReferences" class="structure-edit-list"></div>
 				</div>
 				<div class="form-actions"><div id="structureStatus" class="form-status" role="status"></div><button id="structureCancel" class="button" type="button">取消</button><button id="structureSubmit" class="button" type="submit">确定</button></div>
diff --git a/assets/webui/ofdgo.css b/assets/webui/ofdgo.css
index 20f5ec7..d01c26d 100644
--- a/assets/webui/ofdgo.css
+++ b/assets/webui/ofdgo.css
@@ -3059,6 +3059,10 @@ audio.page-media {
 	text-align-last: justify;
 }
 
+.structure-dialog .panel-actions {
+	gap: 8px;
+}
+
 .structure-dialog .form-actions {
 	margin-top: 12px;
 }
@@ -3086,9 +3090,6 @@ audio.page-media {
 .structure-attribute > button {
 	grid-column: -2;
 	grid-row: 1;
-	width: var(--control-height);
-	height: var(--control-height);
-	padding: 0;
 }
 
 @media (max-width: 480px) {
@@ -3103,12 +3104,18 @@ audio.page-media {
 
 .structure-reference + .structure-reference {
 	border-top: 1px solid var(--line);
-	padding-top: 8px;
+	padding-top: 12px;
+}
+
+.structure-reference .form-row:last-child {
+	margin-bottom: 0;
 }
 
 .structure-reference .form-unit {
+	display: grid;
+	grid-template-columns: minmax(0, 1fr) var(--control-height);
 	min-width: 0;
-	gap: 6px;
+	gap: 8px;
 }
 
 .structure-reference .form-unit > input,
diff --git a/assets/webui/ofdgo.js b/assets/webui/ofdgo.js
index 885e0bb..a066fa1 100644
--- a/assets/webui/ofdgo.js
+++ b/assets/webui/ofdgo.js
@@ -8353,7 +8353,7 @@ function addStructureAttribute(attribute = {}) {
 	}
 	const remove = document.createElement("button");
 	remove.type = "button";
-	remove.className = "small-button";
+	remove.className = "icon-button";
 	remove.textContent = "×";
 	remove.title = "删除属性";
 	remove.setAttribute("aria-label", remove.title);
@@ -8373,9 +8373,9 @@ function addStructureReference(reference = {}) {
 	for (const [index, item] of state.doc.pages.entries()) page.add(new Option(`第${index + 1}页`, item.id));
 	if (reference.pageId) page.value = reference.pageId;
 	const remove = document.createElement("button"), add = document.createElement("button");
-	for (const [button, label, text] of [[remove, "删除引用", "×"], [add, "添加图元", "添加"]]) {
+	for (const [button, label, text] of [[remove, "删除引用", "×"], [add, "添加图元", "+"]]) {
 		button.type = "button";
-		button.className = "small-button";
+		button.className = "icon-button";
 		button.textContent = text;
 		button.title = label;
 		button.setAttribute("aria-label", label);