diff --git a/assets/webui/ofdgo.css b/assets/webui/ofdgo.css
index ce515ad..20f5ec7 100644
--- a/assets/webui/ofdgo.css
+++ b/assets/webui/ofdgo.css
@@ -1215,6 +1215,7 @@ button:not(:disabled):hover {
 
 .info-custom-row input,
 .gradient-stop-row input,
+.structure-attribute > input,
 .form-row input[type="text"],
 .form-row input[type="password"],
 .form-row input[type="number"],
@@ -3049,26 +3050,55 @@ audio.page-media {
 	text-align-last: justify;
 }
 
+.structure-dialog .panel-row {
+	margin-bottom: 0;
+}
+
+.structure-dialog .panel-row > span {
+	width: 4em;
+	text-align-last: justify;
+}
+
+.structure-dialog .form-actions {
+	margin-top: 12px;
+}
+
 .structure-edit-list {
 	display: grid;
-	gap: 8px;
+	gap: 12px;
 	margin-top: 8px;
 }
 
+.structure-edit-list:empty {
+	display: none;
+}
+
 .structure-attribute {
 	display: grid;
-	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 28px;
-	gap: 6px;
+	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) var(--control-height);
+	gap: 8px;
 }
 
 .structure-attribute .structure-attribute-value {
-	grid-column: 1 / 3;
+	grid-column: 1 / -1;
 }
 
 .structure-attribute > button {
-	grid-column: 3;
-	grid-row: 1 / 3;
-	align-self: center;
+	grid-column: -2;
+	grid-row: 1;
+	width: var(--control-height);
+	height: var(--control-height);
+	padding: 0;
+}
+
+@media (max-width: 480px) {
+	.structure-attribute {
+		grid-template-columns: minmax(0, 1fr) var(--control-height);
+	}
+
+	.structure-attribute > input[name="namespace"] {
+		grid-column: 1 / -1;
+	}
 }
 
 .structure-reference + .structure-reference {
diff --git a/assets/webui/ofdgo.js b/assets/webui/ofdgo.js
index d431fd0..885e0bb 100644
--- a/assets/webui/ofdgo.js
+++ b/assets/webui/ofdgo.js
@@ -8342,6 +8342,7 @@ function addStructureAttribute(attribute = {}) {
 	row.className = "structure-attribute";
 	for (const [name, label] of [["name", "属性名称"], ["namespace", "命名空间"], ["value", "属性内容"]]) {
 		const input = document.createElement("input");
+		input.type = "text";
 		input.name = name;
 		input.value = attribute[name] || "";
 		input.placeholder = label;
@@ -8365,6 +8366,7 @@ function addStructureReference(reference = {}) {
 	const row = document.createElement("div");
 	row.className = "structure-reference";
 	const page = document.createElement("select"), object = document.createElement("select"), ids = document.createElement("input");
+	ids.type = "text";
 	page.name = "page";
 	ids.name = "ids";
 	ids.value = (reference.objectIds || []).join(",");
diff --git a/ofdgo_editor_open.go b/ofdgo_editor_open.go
index 73a5168..5cc3a20 100644
--- a/ofdgo_editor_open.go
+++ b/ofdgo_editor_open.go
@@ -320,29 +320,9 @@ func (e *Editor) sourceMaxID(progress editorProgress) (int, error) {
 // 返回: int 最大标识, error 错误信息
 func editorXMLMaxID(input io.Reader) (int, error) {
 	buffer := bufio.NewReader(input)
-	header, err := buffer.Peek(3)
-	if err != nil && err != io.EOF {
+	if found, err := editorXMLPrefix(buffer); err != nil || !found {
 		return 0, err
 	}
-	if bytes.Equal(header, []byte{0xef, 0xbb, 0xbf}) {
-		buffer.Discard(3)
-	}
-	for {
-		header, err := buffer.Peek(1)
-		if err == io.EOF {
-			return 0, nil
-		}
-		if err != nil {
-			return 0, err
-		}
-		if !strings.ContainsRune(" \t\r\n", rune(header[0])) {
-			if header[0] != '<' {
-				return 0, nil
-			}
-			break
-		}
-		buffer.Discard(1)
-	}
 	decoder := xml.NewDecoder(buffer)
 	maximum, started := 0, false
 	for {
diff --git a/ofdgo_editor_resources.go b/ofdgo_editor_resources.go
index edaf835..c36ebe5 100644
--- a/ofdgo_editor_resources.go
+++ b/ofdgo_editor_resources.go
@@ -16,7 +16,6 @@ package ofdgo
 
 import (
 	"bufio"
-	"bytes"
 	"context"
 	"encoding/xml"
 	"fmt"
@@ -317,15 +316,11 @@ func (e *Editor) compactResourceReferences(parts map[string][]byte, reader *Read
 // 返回: bool 是否资源索引, bool 是否可完整判断引用
 func (r *editorResourceRefs) scan(input io.Reader, name string) (bool, bool) {
 	buffer := bufio.NewReader(input)
-	header, err := buffer.Peek(512)
-	if err != nil && err != io.EOF {
+	found, err := editorXMLPrefix(buffer)
+	if err != nil {
 		return false, false
 	}
-	header = bytes.TrimSpace(bytes.TrimPrefix(header, []byte{0xef, 0xbb, 0xbf}))
-	if len(header) == 0 {
-		return false, err == io.EOF && !strings.EqualFold(path.Ext(name), ".xml")
-	}
-	if header[0] != '<' {
+	if !found {
 		return false, !strings.EqualFold(path.Ext(name), ".xml")
 	}
 	decoder := xml.NewDecoder(buffer)
diff --git a/ofdgo_editor_xml.go b/ofdgo_editor_xml.go
index 21756bb..b918018 100644
--- a/ofdgo_editor_xml.go
+++ b/ofdgo_editor_xml.go
@@ -15,6 +15,7 @@
 package ofdgo
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"encoding/xml"
@@ -39,6 +40,39 @@ type editorXMLPatch struct {
 	data       []byte
 }
 
+// editorXMLPrefix 跳过UTF-8字节序标记和XML空白，探测后保留首个内容字节
+// 入参: input 带缓冲的输入流，读取错误及取消信号由底层传递
+// 返回: bool 是否以XML标记起始, error 读取错误
+func editorXMLPrefix(input *bufio.Reader) (bool, error) {
+	header, err := input.Peek(3)
+	if err != nil && err != io.EOF {
+		return false, err
+	}
+	if bytes.Equal(header, []byte{0xef, 0xbb, 0xbf}) {
+		input.Discard(3)
+	}
+	for {
+		if _, err := input.Peek(1); err != nil {
+			if err == io.EOF {
+				return false, nil
+			}
+			return false, err
+		}
+		chunk, _ := input.Peek(input.Buffered())
+		count := 0
+		for count < len(chunk) {
+			switch chunk[count] {
+			case ' ', '\t', '\r', '\n':
+				count++
+			default:
+				input.Discard(count)
+				return chunk[count] == '<', nil
+			}
+		}
+		input.Discard(count)
+	}
+}
+
 // parseEditorXML 解析节点位置，保留命名空间、注释和原始格式
 // 入参: data XML原文
 // 返回: *editorXML 根节点, error 错误信息