/* PPTX专用样式 */
.pptx-viewer {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    min-height: 500px;
}

.pptx-info {
    background: #e8f4fd;
    border: 1px solid #bee5eb;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
    color: #0c5460;
    text-align: center;
    font-weight: 500;
}

.pptx-notice {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.pptx-notice h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.4em;
}

.pptx-notice p {
    color: #5a6c7d;
    margin-bottom: 15px;
    line-height: 1.6;
}

.pptx-suggestions {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 20px;
    margin-top: 20px;
}

.pptx-suggestions h4 {
    color: #e67e22;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.pptx-suggestions ul {
    list-style: none;
    padding: 0;
}

.pptx-suggestions li {
    padding: 8px 0;
    color: #5a6c7d;
    position: relative;
    padding-left: 20px;
}

.pptx-suggestions li:before {
    content: "💡";
    position: absolute;
    left: 0;
}

/* 幻灯片样式（当PPTXjs完全工作时） */
.slide {
    background: white;
    margin: 20px auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 900px;
    min-height: 600px;
    position: relative;
}

.slide-content {
    padding: 40px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.slide-title {
    font-size: 2em;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
}

.slide-text {
    font-size: 1.2em;
    line-height: 1.6;
    color: #34495e;
    text-align: center;
}

/* 幻灯片播放模式 */
.slideshow-mode {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: black;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slideshow-mode .slide {
    max-width: 90vw;
    max-height: 90vh;
    margin: 0;
}

.slideshow-controls {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px 25px;
    border-radius: 25px;
}

.slideshow-controls button {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.slideshow-controls button:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 4px;
    background: #ecf0f1;
    border-radius: 2px;
    overflow: hidden;
    margin: 20px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    transition: width 0.3s ease;
    border-radius: 2px;
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #2c3e50;
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
}

/* Enhanced PPTX幻灯片放映器样式 */
.pptx-slideshow {
    max-width: 1000px;
    margin: 20px auto;
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.pptx-slide-info {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 25px;
    text-align: center;
    font-size: 16px;
    font-weight: 600;
}

/* 幻灯片容器 */
.pptx-slide-container {
    background: #ffffff;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

/* 单个幻灯片样式 */
.pptx-slide {
    width: 100%;
    max-width: 800px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.pptx-slide:hover {
    transform: translateY(-2px);
}

/* 幻灯片头部 */
.slide-header {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    padding: 15px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slide-header .slide-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
    flex: 1;
}

.slide-number {
    font-size: 14px;
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 12px;
    border-radius: 15px;
    font-weight: 500;
}

/* 幻灯片内容区域 */
.slide-body {
    padding: 30px;
    min-height: 350px;
}

.slide-content-inner {
    text-align: center;
}

/* 幻灯片标题文本 */
.slide-title-text {
    font-size: 28px;
    font-weight: 700;
    color: #2c3e50;
    margin: 0 0 25px 0;
    padding-bottom: 15px;
    border-bottom: 3px solid #3498db;
    display: inline-block;
}

/* 混合内容区域 */
.slide-mixed-content {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

/* 幻灯片文本内容 */
.slide-text-content {
    width: 100%;
    max-width: 600px;
}

.slide-paragraph {
    font-size: 16px;
    line-height: 1.8;
    color: #34495e;
    margin: 15px 0;
    text-align: left;
}

/* 幻灯片图片内容 */
.slide-images-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.slide-image-container {
    text-align: center;
    margin: 15px 0;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.slide-image-container:hover {
    transform: scale(1.02);
}

.slide-image {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}

.slide-image:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.slide-image-caption {
    margin-top: 10px;
    font-size: 14px;
    color: #7f8c8d;
    font-style: italic;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* 图片加载状态 */
.slide-image[src*="data:image/svg"] {
    opacity: 0.6;
    filter: grayscale(100%);
}

.slide-image:not([src*="data:image/svg"]) {
    opacity: 1;
    filter: none;
}

/* 空幻灯片样式 */
.slide-empty {
    text-align: center;
    color: #7f8c8d;
    padding: 40px;
}

.slide-empty h3 {
    color: #3498db;
    margin-bottom: 15px;
}

/* 缩略图导航 */
.pptx-thumbnail-nav {
    background: #e9ecef;
    padding: 20px;
    border-top: 1px solid #dee2e6;
}

.thumbnail-container {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding: 10px 0;
    justify-content: center;
}

.thumbnail-item {
    min-width: 120px;
    height: 80px;
    background: #ffffff;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.thumbnail-item:hover {
    border-color: #3498db;
    transform: scale(1.05);
}

.thumbnail-item.active {
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.3);
}

.thumbnail-content {
    padding: 8px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.thumbnail-title {
    font-size: 12px;
    font-weight: 500;
    color: #2c3e50;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.thumbnail-number {
    font-size: 11px;
    color: #7f8c8d;
    text-align: right;
    margin-top: auto;
}

/* 错误状态样式 */
.slide-error {
    text-align: center;
    color: #e74c3c;
    font-size: 16px;
    padding: 40px;
}

/* 动画效果 */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.pptx-slide.active {
    animation: slideIn 0.3s ease-out;
}

/* 响应式幻灯片 */
@media (max-width: 768px) {
    .pptx-notice {
        padding: 20px;
    }
    
    .pptx-suggestions {
        padding: 15px;
    }
    
    .slide {
        margin: 10px;
        min-height: 400px;
    }
    
    .slide-title {
        font-size: 1.5em;
    }
    
    .slide-text {
        font-size: 1em;
    }
    
    .slideshow-controls {
        bottom: 20px;
        padding: 10px 20px;
    }
    
    .pptx-slideshow {
        margin: 10px;
    }
    
    .pptx-slide-container {
        padding: 20px;
    }
    
    .slide-body {
        padding: 20px;
    }
    
    .slide-title-text {
        font-size: 24px;
    }
    
    .slide-paragraph {
        font-size: 14px;
    }
    
    .thumbnail-container {
        justify-content: flex-start;
    }
    
    .thumbnail-item {
        min-width: 100px;
        height: 70px;
    }
    
    /* 移动端图片样式调整 */
    .slide-mixed-content {
        gap: 15px;
    }
    
    .slide-image-container {
        padding: 10px;
        margin: 10px 0;
    }
    
    .slide-image {
        max-width: 100%;
        max-height: 250px;
    }
    
    .slide-image-caption {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .pptx-slide-container {
        padding: 15px;
    }
    
    .slide-body {
        padding: 15px;
    }
    
    .slide-title-text {
        font-size: 20px;
    }
    
    .slide-header {
        padding: 12px 15px;
    }
    
    .slide-header .slide-title {
        font-size: 16px;
    }
    
    .slide-number {
        font-size: 12px;
        padding: 3px 8px;
    }
    
    .thumbnail-item {
        min-width: 80px;
        height: 60px;
    }
    
    .thumbnail-content {
        padding: 5px;
    }
    
    /* 小屏幕图片优化 */
    .slide-mixed-content {
        gap: 10px;
    }
    
    .slide-image-container {
        padding: 8px;
        margin: 8px 0;
    }
    
    .slide-image {
        max-height: 200px;
    }
    
    .slide-text-content {
        max-width: 100%;
    }
    
    .slide-paragraph {
        font-size: 14px;
        padding: 0 5px;
    }
}

/* Office-Viewer样式 */
.office-viewer-container {
    max-width: 1000px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.office-viewer-header {
    background: linear-gradient(135deg, #0078d4 0%, #106ebe 100%);
    color: white;
    padding: 20px;
    text-align: center;
}

.office-viewer-header h3 {
    margin: 0 0 8px 0;
    font-size: 24px;
    font-weight: 600;
}

.viewer-info {
    font-size: 14px;
    opacity: 0.9;
}

.office-viewer-content {
    min-height: 500px;
    padding: 20px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #0078d4;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-message {
    text-align: center;
    color: #666;
    padding: 40px;
}

.preview-notice {
    background: #e3f2fd;
    border: 1px solid #bbdefb;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 20px;
    text-align: center;
}

.preview-notice p {
    margin: 5px 0;
    color: #1976d2;
}

.fallback-preview {
    padding: 20px;
    text-align: center;
}

.fallback-header h3 {
    color: #0078d4;
    margin-bottom: 20px;
}

.file-info {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 25px;
    text-align: left;
}

.file-info p {
    margin: 8px 0;
    font-size: 16px;
}

.preview-options {
    text-align: left;
    margin-bottom: 25px;
}

.preview-options h4 {
    color: #0078d4;
    margin-bottom: 15px;
}

.preview-options ul {
    list-style: none;
    padding: 0;
}

.preview-options li {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 4px;
    padding: 12px;
    margin: 8px 0;
    font-size: 14px;
}

.technical-note {
    background: #e9ecef;
    border-radius: 6px;
    padding: 20px;
    text-align: left;
}

.technical-note h4 {
    color: #6c757d;
    margin-bottom: 10px;
}

.technical-note p {
    color: #6c757d;
    font-size: 14px;
    line-height: 1.6;
}

/* 图片提取预览样式 */
.image-extraction-preview {
    text-align: center;
}

.extracted-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.extracted-image-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.image-header {
    font-weight: 600;
    color: #0078d4;
    margin-bottom: 10px;
}

.image-caption {
    font-size: 12px;
    color: #6c757d;
    margin-top: 10px;
    font-style: italic;
}

/* 文本提取预览样式 */
.text-extraction-preview {
    text-align: left;
}

.slides-text-content {
    margin-top: 20px;
}

.slide-text-item {
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.slide-text-header {
    background: linear-gradient(135deg, #0078d4 0%, #106ebe 100%);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slide-text-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.slide-number {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.slide-text-body {
    padding: 20px;
}

.slide-text-paragraph {
    margin: 10px 0;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.slide-text-paragraph:last-child {
    border-bottom: none;
}

.slide-text-empty {
    color: #999;
    font-style: italic;
    text-align: center;
    padding: 20px;
}

/* PowerPoint风格布局样式 */
.ppt-layout-container {
    width: 100%;
    height: 72vh;
    background: #f3f2f1;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
}

/* 头部工具栏 */
.ppt-header {
    background: #ffffff;
    border-bottom: 1px solid #e1dfdd;
    padding: 10px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ppt-toolbar {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    justify-content: space-between;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-button {
    background: #f3f2f1;
    color: #323130;
    border: 1px solid #e1dfdd;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.tool-button:hover {
    background: #edebe9;
    border-color: #c8c6c4;
}

.zoom-level {
    font-size: 14px;
    font-weight: 600;
    color: #323130;
    min-width: 60px;
    text-align: center;
}

.slide-counter {
    font-size: 16px;
    font-weight: 600;
    color: #323130;
    min-width: 150px;
    text-align: center;
}

.fullscreen {
    margin-left: auto;
}

/* 主要内容区域 */
.ppt-main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* 左侧缩略图区域 */
.ppt-sidebar {
    width: 280px;
    background: #faf9f8;
    border-right: 1px solid #e1dfdd;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    background: #f3f2f1;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    color: #323130;
    border-bottom: 1px solid #e1dfdd;
}

.thumbnails-container {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

/* 缩略图样式 */
.thumbnail-slide {
    background: #ffffff;
    border: 2px solid transparent;
    border-radius: 4px;
    margin-bottom: 8px;
    padding: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.thumbnail-slide:hover {
    border-color: #0078d4;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.thumbnail-slide.active {
    border-color: #0078d4;
    background: #f3f9ff;
    box-shadow: 0 0 0 1px #0078d4;
}

.thumbnail-number {
    position: absolute;
    top: 4px;
    right: 4px;
    background: #605e5c;
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 8px;
    font-weight: 500;
}

.thumbnail-slide.active .thumbnail-number {
    background: #0078d4;
}

.thumbnail-content {
    display: flex;
    flex-direction: column;
    height: 100px;
}

.thumbnail-title {
    font-size: 12px;
    font-weight: 500;
    color: #323130;
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.thumbnail-preview {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f7f6;
    border-radius: 3px;
    overflow: hidden;
}

.thumbnail-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.thumbnail-text {
    font-size: 24px;
    color: #a19f9d;
}

/* 右侧预览区域 */
.ppt-preview-area {
    flex: 1;
    background: #ffffff;
    display: flex;
    flex-direction: column;
}

.preview-header {
    background: #faf9f8;
    border-bottom: 1px solid #e1dfdd;
    padding: 12px 20px;
}

.current-slide-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.current-slide-title {
    font-size: 16px;
    font-weight: 600;
    color: #323130;
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.current-slide-number {
    font-size: 14px;
    color: #605e5c;
    background: #e1dfdd;
    padding: 4px 12px;
    border-radius: 12px;
}

/* 幻灯片显示区域 */
.slide-display-area {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-content-display {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* 幻灯片导航按钮样式 */
.slide-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 10px 20px;
    margin-bottom: 15px;
}

.nav-button {
    background-color: #4a89dc;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 15px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.nav-button:hover {
    background-color: #3a70c0;
}

.nav-button:disabled {
    background-color: #b5c7e3;
    cursor: not-allowed;
}

.slide-counter {
    font-size: 14px;
    color: #555;
    font-weight: 500;
}

/* 显示区域内容样式 */
.display-subtitle {
    font-size: 24px;
    font-weight: 600;
    color: #0078d4;
    margin: 20px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid #e3f2fd;
}

.display-content-text {
    font-size: 18px;
    line-height: 1.6;
    color: #323130;
    margin: 16px 0;
    padding: 10px 0;
}

.display-image-container {
    margin: 25px 0;
    text-align: center;
}

.display-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.display-image:hover {
    transform: scale(1.02);
}

.display-image-caption {
    margin-top: 12px;
    font-size: 14px;
    color: #605e5c;
    font-style: italic;
}

/* 绝对定位元素样式 */
.slide-canvas {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 100%!important;
    flex: 1;
    overflow: auto !important;
}

.positioned-subtitle {
    /* 不设置任何默认样式，完全使用PPT原始格式 */
}

.positioned-text {
    /* 不设置任何默认样式，完全使用PPT原始格式 */
}

.positioned-image-container {
    border-radius: 4px;
    overflow: visible;
}

.positioned-image-caption {
    font-size: 12px !important;
    color: #605e5c !important;
    background: rgba(255,255,255,0.9) !important;
}

.display-empty {
    text-align: center;
    color: #a19f9d;
    font-style: italic;
    padding: 60px 20px;
    background: #f8f7f6;
    border-radius: 8px;
    border: 2px dashed #e1dfdd;
}

/* 组合图片样式 */
.images-combined-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 0;
}

.image-combined-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.image-combined-header {
    font-weight: 600;
    color: #0078d4;
    margin-bottom: 15px;
    font-size: 16px;
}

.image-combined-caption {
    font-size: 12px;
    color: #6c757d;
    margin-top: 10px;
    font-style: italic;
}

.no-images {
    text-align: center;
    color: #6c757d;
    font-style: italic;
    padding: 40px;
}

/* PowerPoint风格响应式设计 */
@media (max-width: 768px) {
    .ppt-layout-container {
        height: 500px;
    }
    
    .ppt-main-content {
        flex-direction: column;
    }
    
    .ppt-sidebar {
        width: 100%;
        height: 150px;
        border-right: none;
        border-bottom: 1px solid #e1dfdd;
    }
    
    .thumbnails-container {
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 8px;
        gap: 8px;
    }
    
    .thumbnail-slide {
        min-width: 120px;
        margin-bottom: 0;
        margin-right: 0;
    }
    
    .thumbnail-content {
        height: 80px;
    }
    
    .ppt-preview-area {
        flex: 1;
    }
    
    .slide-display-area {
        padding: 20px;
    }
    
    .display-subtitle {
        font-size: 20px;
    }
    
    .display-content-text {
        font-size: 16px;
    }
    
    .positioned-subtitle {
        /* 响应式下也不设置默认样式 */
    }
    
    .positioned-text {
        /* 响应式下也不设置默认样式 */
    }
    
    .current-slide-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .current-slide-title {
        max-width: 100%;
    }
    
    /* 移动端幻灯片画布缩放 */
    .slide-canvas {
        transform: scale(0.8);
        transform-origin: center top;
    }
}

@media (max-width: 480px) {
    .ppt-layout-container {
        height: 400px;
    }
    
    .ppt-header {
        padding: 8px 15px;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .ppt-title {
        font-size: 14px;
    }
    
    .ppt-stats {
        font-size: 12px;
    }
    
    .ppt-sidebar {
        height: 120px;
    }
    
    .thumbnail-slide {
        min-width: 100px;
    }
    
    .thumbnail-content {
        height: 70px;
    }
    
    .thumbnail-title {
        font-size: 11px;
    }
    
    .slide-display-area {
        padding: 15px;
    }
    
    .display-subtitle {
        font-size: 18px;
    }
    
    .display-content-text {
        font-size: 15px;
    }
    
    .preview-header {
        padding: 8px 15px;
    }
}

/* 原有文本预览样式保持 */
@media (max-width: 768px) {
    .slide-text-header {
        padding: 12px 15px;
    }
    
    .slide-text-header h3 {
        font-size: 16px;
    }
    
    .slide-text-body {
        padding: 15px;
    }
    
    .slide-text-paragraph {
        font-size: 14px;
    }
}