/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 - 优化色彩搭配 */
:root {
    --primary-color: #1a365d;
    --secondary-color: #2b77e6;
    --accent-color: #e53e3e;
    --success-color: #38a169;
    --warning-color: #dd6b20;
    --info-color: #3182ce;
    --text-color: #2d3748;
    --text-light: #718096;
    --text-muted: #a0aec0;
    --bg-color: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.12);
    --shadow-strong: 0 10px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 深色主题 - 优化投屏效果和色彩层次 */
[data-theme="dark"] {
    --primary-color: #f7fafc;
    --secondary-color: #63b3ed;
    --accent-color: #fc8181;
    --success-color: #68d391;
    --warning-color: #f6e05e;
    --info-color: #90cdf4;
    --text-color: #f7fafc;
    --text-light: #cbd5e0;
    --text-muted: #a0aec0;
    --bg-color: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --border-color: #4a5568;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.8);
    --shadow-strong: 0 15px 50px rgba(0, 0, 0, 0.9);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 基础样式 - 大会议室优化 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: var(--transition);
    overflow-x: hidden;
    position: relative;
    font-size: 1.3rem;
}

/* 动态背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(52, 152, 219, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(155, 89, 182, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(46, 204, 113, 0.1) 0%, transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

[data-theme="dark"] body::before {
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 107, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(81, 207, 102, 0.07) 0%, transparent 50%);
}

@keyframes backgroundFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

/* 鼠标跟随效果 */
.cursor-follower {
    position: fixed;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.3), transparent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease;
    mix-blend-mode: difference;
}

/* 鼠标悬停光晕效果 */
.hover-glow {
    position: relative;
    overflow: hidden;
}

.hover-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.hover-glow:hover::before {
    left: 100%;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0 2rem;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 26, 0.98);
    border-bottom: 2px solid var(--secondary-color);
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.2);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-brand i {
    color: var(--secondary-color);
    font-size: 1.8rem;
    transition: var(--transition);
    animation: iconFloat 3s ease-in-out infinite;
    display: inline-block;
}

.nav-brand i:hover {
    transform: scale(1.1) rotate(5deg);
    color: var(--accent-color);
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-3px); }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.8rem 1.2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    font-size: 1.2rem;
}

[data-theme="dark"] .nav-link {
    color: var(--primary-color);
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
    background-color: rgba(52, 152, 219, 0.1);
}

.nav-controls {
    display: flex;
    gap: 1rem;
}

.theme-toggle,
.fullscreen-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.4rem;
    padding: 0.8rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover,
.fullscreen-toggle:hover {
    background-color: var(--bg-secondary);
    color: var(--secondary-color);
}

.theme-toggle i,
.fullscreen-toggle i {
    transition: var(--transition);
    display: inline-block;
}

.theme-toggle:hover i {
    transform: rotate(180deg) scale(1.2);
    color: var(--secondary-color);
}

.fullscreen-toggle:hover i {
    transform: scale(1.2);
    color: var(--secondary-color);
    animation: expandPulse 0.6s ease-in-out;
}

@keyframes expandPulse {
    0%, 100% { transform: scale(1.2); }
    50% { transform: scale(1.4); }
}

/* PPT容器 */
.ppt-container {
    margin-top: 80px;
    height: calc(100vh - 80px);
    overflow: hidden;
    position: relative;
}

/* 幻灯片 */
.slide {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding: 3rem;
    background: var(--bg-color);
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
}

.slide.prev {
    transform: translateX(-100%);
}

/* 幻灯片内容 */
.slide-content {
    max-width: 1400px;
    margin: 0 auto;
    animation: slideInUp 0.8s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 首页样式 - 大会议室优化 */
.hero-section {
    text-align: center;
    padding: 4rem 0;
}

.main-title {
    font-size: 5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.subtitle {
    font-size: 2.2rem;
    color: var(--text-light);
    margin-bottom: 4rem;
    font-weight: 500;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-card i {
    font-size: 4.5rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    transition: var(--transition);
    display: inline-block;
}

.feature-card:hover i {
    transform: scale(1.2) rotateY(360deg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.3));
}

.feature-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 1.3rem;
}

/* 幻灯片标题 - 大会议室优化 */
.slide-title {
    font-size: 4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 3.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    border-bottom: 5px solid var(--secondary-color);
    padding-bottom: 2rem;
    line-height: 1.2;
}

.slide-title i {
    color: var(--secondary-color);
    font-size: 4rem;
    transition: var(--transition);
    display: inline-block;
}

.slide-title:hover i {
    transform: scale(1.1) rotate(-5deg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleIconGlow 2s ease-in-out infinite alternate;
}

@keyframes titleIconGlow {
    0% { filter: drop-shadow(0 0 5px rgba(43, 119, 230, 0.5)); }
    100% { filter: drop-shadow(0 0 15px rgba(43, 119, 230, 0.8)); }
}

/* 内容区域 */
.content-sections {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.section-card {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: fadeInUp 0.6s ease-out;
}

/* 突出显示的重点模块样式 */
.highlight-section {
    background: linear-gradient(135deg, #fff8e1 0%, #fff3cd 100%) !important;
    border: 3px solid #ff6b6b !important;
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.3) !important;
    transform: scale(1.02);
    position: relative;
    animation: highlight-pulse 2s ease-in-out infinite alternate;
}

.highlight-section::before {
    content: '⭐ 重点内容';
    position: absolute;
    top: -12px;
    right: 20px;
    background: #ff6b6b;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    z-index: 10;
}

@keyframes highlight-pulse {
    0% {
        box-shadow: 0 8px 24px rgba(255, 107, 107, 0.3);
    }
    100% {
        box-shadow: 0 12px 32px rgba(255, 107, 107, 0.5);
    }
}

/* 深色模式下的突出显示样式 */
[data-theme="dark"] .highlight-section {
    background: linear-gradient(135deg, #2d2d2d 0%, #3d3d3d 100%) !important;
    border: 3px solid #ff6b6b !important;
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.4) !important;
}

[data-theme="dark"] .highlight-section::before {
    background: #ff6b6b;
    color: white;
}

.section-card:nth-child(even) {
    animation-delay: 0.1s;
}

.section-card:nth-child(odd) {
    animation-delay: 0.2s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-card h3 {
    font-size: 2.4rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    font-weight: 600;
}

.section-card h3 i {
    color: var(--secondary-color);
    font-size: 2.4rem;
    transition: var(--transition);
    display: inline-block;
}

.section-card:hover h3 i {
    transform: scale(1.15) rotate(10deg);
    color: var(--accent-color);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.section-card h3 i.fa-graduation-cap:hover {
    animation: bounce 0.6s ease-in-out;
}

.section-card h3 i.fa-file-word:hover {
    animation: shake 0.6s ease-in-out;
}

.section-card h3 i.fa-edit:hover {
    animation: pulse 0.8s ease-in-out;
}

.section-card h3 i.fa-project-diagram:hover {
    animation: spin 1s ease-in-out;
}

@keyframes bounce {
    0%, 20%, 60%, 100% { transform: translateY(0) scale(1.15); }
    40% { transform: translateY(-10px) scale(1.15); }
    80% { transform: translateY(-5px) scale(1.15); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0) scale(1.15); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px) scale(1.15); }
    20%, 40%, 60%, 80% { transform: translateX(5px) scale(1.15); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1.15); }
    50% { transform: scale(1.3); }
}

@keyframes spin {
    0% { transform: rotate(0deg) scale(1.15); }
    100% { transform: rotate(360deg) scale(1.15); }
}

.content-list {
    list-style: none;
    padding-left: 0;
}

.content-list li {
    padding: 1rem 0;
    padding-left: 2.5rem;
    position: relative;
    line-height: 1.7;
    font-size: 1.4rem;
}

.content-list li::before {
    content: "▸";
    color: var(--secondary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
    font-size: 1.6rem;
}

ol.content-list li::before {
    content: counter(list-counter) ".";
    counter-increment: list-counter;
}

ol.content-list {
    counter-reset: list-counter;
}

/* 子列表 */
.sub-list {
    margin-top: 1rem;
    margin-left: 2rem;
}

.sub-list li {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* 流程步骤 */
.process-flow {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.process-step {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    border-left: 5px solid var(--secondary-color);
}

.step-number {
    background: var(--secondary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.step-content h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.6rem;
}

.step-content p {
    font-size: 1.3rem;
}

/* 工作流程 */
.workflow {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.workflow-item {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    flex: 1;
    min-width: 200px;
    border: 2px solid var(--border-color);
}

.workflow-item i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    transition: var(--transition);
    display: inline-block;
}

.workflow-item:hover i {
    transform: scale(1.3) rotate(15deg);
    color: var(--accent-color);
    animation: workflowIconPulse 1s ease-in-out;
}

@keyframes workflowIconPulse {
    0%, 100% { transform: scale(1.3) rotate(15deg); }
    50% { transform: scale(1.5) rotate(15deg); }
}

.workflow-item p {
    font-size: 1.2rem;
}

.workflow-arrow {
    font-size: 2rem;
    color: var(--secondary-color);
    font-weight: bold;
}

/* 工具网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.tool-category h4 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.8rem;
}

.tool-category h4 i {
    transition: var(--transition);
    display: inline-block;
}

.tool-category:hover h4 i {
    transform: scale(1.2) rotate(10deg);
    color: var(--secondary-color);
    animation: categoryIconBounce 0.8s ease-in-out;
}

@keyframes categoryIconBounce {
    0%, 100% { transform: scale(1.2) rotate(10deg) translateY(0); }
    50% { transform: scale(1.2) rotate(10deg) translateY(-8px); }
}

.tool-item {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border-left: 5px solid var(--secondary-color);
}

.tool-item h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.tool-item p {
    font-size: 1.2rem;
}

/* 链接网格 */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.link-card {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.link-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-2px);
}

.link-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
    display: inline-block;
}

.link-card:hover i {
    transform: scale(1.3) rotate(360deg);
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: linkIconSpin 1.5s ease-in-out;
}

@keyframes linkIconSpin {
    0% { transform: scale(1.3) rotate(0deg); }
    50% { transform: scale(1.5) rotate(180deg); }
    100% { transform: scale(1.3) rotate(360deg); }
}

.link-card h4 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.external-link {
    color: var(--secondary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    font-size: 1.1rem;
}

.external-link:hover {
    text-decoration: underline;
}

/* 特殊卡片样式 */
.warning-card {
    border-left: 5px solid var(--warning-color);
}

.warning-card h3 i {
    color: var(--warning-color);
}

.important-card {
    border-left: 5px solid var(--accent-color);
    background: rgba(231, 76, 60, 0.05);
}

.important-card h3 i {
    color: var(--accent-color);
}

.info-card {
    border-left: 5px solid var(--success-color);
    background: rgba(39, 174, 96, 0.05);
}

.info-card h3 i {
    color: var(--success-color);
}

/* 高亮框 */
.highlight-box {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--secondary-color);
    margin-top: 1.5rem;
}

.highlight-box h5 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.highlight-box p {
    font-size: 1.2rem;
}

.tip {
    background: rgba(52, 152, 219, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
    border-left: 5px solid var(--secondary-color);
    font-size: 1.2rem;
}

/* 子部分 */
.subsection {
    margin-top: 2rem;
}

.subsection h4 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

/* 控制按钮 */
.slide-controls {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: 25px;
    box-shadow: var(--shadow);
    z-index: 1000;
}

[data-theme="dark"] .slide-controls {
    background: rgba(26, 26, 26, 0.95);
    border: 1px solid var(--secondary-color);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.control-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.2rem;
}

.control-btn:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.control-btn:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

/* 深色模式下的按钮优化 */
[data-theme="dark"] .control-btn {
    background: var(--secondary-color);
    color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.4);
}

[data-theme="dark"] .control-btn:hover {
    background: var(--primary-color);
    color: var(--bg-color);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .control-btn:disabled {
    background: #555555;
    color: #888888;
    box-shadow: none;
}

.slide-indicator {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.3rem;
}

/* 进度条 */
.progress-bar {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--border-color);
    z-index: 999;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    width: 25%;
    transition: width 0.6s ease;
}

/* 深色模式下的导航链接悬停效果优化 */
[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    color: var(--secondary-color);
    background-color: rgba(0, 212, 255, 0.15);
    box-shadow: 0 2px 8px rgba(0, 212, 255, 0.2);
}

/* 深色模式下的主题切换按钮优化 */
[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .fullscreen-toggle:hover {
    background-color: rgba(0, 212, 255, 0.2);
    color: var(--secondary-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        height: 70px;
    }
    
    .nav-brand {
        font-size: 1.2rem;
    }
    
    .nav-brand span {
        display: none;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-link {
        padding: 0.5rem 0.8rem;
        font-size: 1rem;
    }
    
    .ppt-container {
        margin-top: 70px;
        height: calc(100vh - 70px);
    }
    
    .slide {
        padding: 1.5rem;
    }
    
    .main-title {
        font-size: 2.5rem;
    }
    
    .slide-title {
        font-size: 2.2rem;
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow {
        flex-direction: column;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .slide-controls {
        bottom: 1rem;
        right: 1rem;
    }
    
    .progress-bar {
        top: 70px;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }
    
    .slide {
        padding: 1rem;
    }
    
    .section-card {
        padding: 1.5rem;
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .slide-title {
        font-size: 1.8rem;
    }
}

/* 全屏模式 */
.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
}

.fullscreen .navbar {
    display: none;
}

.fullscreen .ppt-container {
    margin-top: 0;
    height: 100vh;
}

.fullscreen .progress-bar {
    top: 0;
}

/* 滚动条样式 */
.slide::-webkit-scrollbar {
    width: 6px;
}

.slide::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.slide::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 3px;
}

.slide::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 打印样式 */
@media print {
    .navbar,
    .slide-controls,
    .progress-bar {
        display: none;
    }
    
    .slide {
        position: static;
        opacity: 1;
        transform: none;
        page-break-after: always;
        height: auto;
        overflow: visible;
    }
}