diff --git a/src/main/java/com/novelreader/model/History.java b/src/main/java/com/novelreader/model/History.java
index 85266b1..2128c98 100644
--- a/src/main/java/com/novelreader/model/History.java
+++ b/src/main/java/com/novelreader/model/History.java
@@ -2,12 +2,17 @@ package com.novelreader.model;
 
 import lombok.Data;
 import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.index.CompoundIndex;
+import org.springframework.data.mongodb.core.index.CompoundIndexes;
 import org.springframework.data.mongodb.core.mapping.Document;
 
 import java.time.Instant;
 
 @Data
 @Document(collection = "history")
+@CompoundIndexes({
+    @CompoundIndex(name = "userId_novelId_unique", def = "{'userId': 1, 'novelId': 1}", unique = true)
+})
 public class History {
     @Id
     private String id;
diff --git a/src/main/resources/static/css/reader.css b/src/main/resources/static/css/reader.css
index 8eb1daa..29f6c8c 100644
--- a/src/main/resources/static/css/reader.css
+++ b/src/main/resources/static/css/reader.css
@@ -10,6 +10,80 @@
     transition: background var(--transition-normal);
 }
 
+/* ========== 滚动模式 ========== */
+.reader-page.scroll-mode .reader-content {
+    max-width: 720px;
+    margin: 0 auto;
+    padding: var(--spacing-lg);
+    padding-top: calc(var(--spacing-xl) + var(--safe-area-top));
+    padding-bottom: calc(100px + var(--safe-area-bottom));
+}
+
+/* ========== 翻页模式 ========== */
+.reader-page.page-mode {
+    position: fixed;
+    inset: 0;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
+}
+
+.page-container {
+    flex: 1;
+    overflow: hidden;
+    position: relative;
+    padding: var(--spacing-lg);
+    padding-top: calc(var(--spacing-xl) + var(--safe-area-top));
+    padding-bottom: calc(var(--spacing-lg) + var(--safe-area-bottom));
+}
+
+.page-content {
+    max-width: 720px;
+    margin: 0 auto;
+    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    will-change: transform;
+}
+
+/* 页码指示器 */
+.page-indicator {
+    position: fixed;
+    bottom: calc(var(--spacing-md) + var(--safe-area-bottom));
+    left: 50%;
+    transform: translateX(-50%);
+    font-size: var(--font-size-xs);
+    color: var(--text-muted);
+    background: rgba(0, 0, 0, 0.5);
+    padding: 4px 12px;
+    border-radius: var(--radius-full);
+    z-index: 50;
+}
+
+/* 点击区域 */
+.page-tap-zones {
+    position: fixed;
+    inset: 0;
+    display: flex;
+    z-index: 10;
+    pointer-events: auto;
+}
+
+.tap-zone {
+    height: 100%;
+}
+
+.tap-prev {
+    width: 30%;
+}
+
+.tap-center {
+    width: 40%;
+}
+
+.tap-next {
+    width: 30%;
+}
+
+/* 兼容旧的reader-content类 */
 .reader-content {
     max-width: 720px;
     margin: 0 auto;
@@ -271,6 +345,40 @@
     color: var(--bg-primary);
 }
 
+/* 阅读模式控制 */
+.reading-mode-control {
+    display: flex;
+    gap: var(--spacing-sm);
+}
+
+.reading-mode-btn {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: var(--spacing-xs);
+    padding: var(--spacing-md);
+    background: var(--bg-card);
+    border-radius: var(--radius-md);
+    color: var(--text-secondary);
+    transition: all var(--transition-fast);
+}
+
+.reading-mode-btn svg {
+    width: 28px;
+    height: 28px;
+    fill: currentColor;
+}
+
+.reading-mode-btn span {
+    font-size: var(--font-size-xs);
+}
+
+.reading-mode-btn.active {
+    background: var(--primary);
+    color: var(--bg-primary);
+}
+
 /* 主题选择 */
 .theme-control {
     display: flex;