/* 主要样式文件 - main.css */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-blue: #2E86AB;
    --primary-red: #D32F2F;
    --primary-orange: #F18F01;
    --primary-green: #388E3C;
    
    /* 辅助色彩 */
    --cool-blue: #1976D2;
    --warm-red: #F44336;
    --neutral-gray: #757575;
    --background-light: #F5F5F5;
    --background-white: #FFFFFF;
    
    /* 状态色彩 */
    --success: #4CAF50;
    --warning: #FF9800;
    --error: #F44336;
    --info: #2196F3;
    
    /* 色盲友好色彩 */
    --cb-blue: #0077BB;
    --cb-orange: #EE7733;
    --cb-green: #009988;
    --cb-red: #CC3311;
    --cb-purple: #EE3377;
    
    /* 字体大小 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: #333;
    background-color: var(--background-white);
    overflow-x: hidden;
}

/* Reveal.js 自定义样式 */
.reveal {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: var(--font-size-base);
}

.reveal .slides {
    text-align: left;
}

.reveal .slides section {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

/* 标题样式 */
.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.reveal h1 {
    font-size: var(--font-size-5xl);
}

.reveal h2 {
    font-size: var(--font-size-4xl);
}

.reveal h3 {
    font-size: var(--font-size-3xl);
}

.reveal h4 {
    font-size: var(--font-size-2xl);
}

/* 文本样式 */
.reveal p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.reveal ul,
.reveal ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.reveal li {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

/* 封面页样式 */
.slide-cover {
    text-align: center;
    color: white;
}

.cover-content {
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #fff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.grade-info {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.8;
}

/* 地球温度计动画 */
.earth-thermometer-animation {
    margin-bottom: var(--spacing-2xl);
}

.earth-container {
    position: relative;
    display: inline-block;
    width: 200px;
    height: 200px;
}

.earth-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.thermometer-overlay {
    position: absolute;
    top: 50%;
    right: -40px;
    transform: translateY(-50%);
    width: 30px;
    height: 120px;
    background: linear-gradient(to top, var(--primary-red), var(--primary-orange), var(--primary-blue));
    border-radius: 15px;
    border: 3px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.temperature-line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-radius: 12px;
    transition: height 2s ease-in-out;
}

/* 按钮样式 */
.btn-start-exploration,
.btn-goto-lesson,
.btn-restart {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: white;
    background: linear-gradient(45deg, var(--primary-blue), var(--cool-blue));
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    text-decoration: none;
    margin: var(--spacing-sm);
}

.btn-start-exploration:hover,
.btn-goto-lesson:hover,
.btn-restart:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(45deg, var(--cool-blue), var(--primary-blue));
}

.btn-start-exploration:active,
.btn-goto-lesson:active,
.btn-restart:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* 课程导航网格 */
.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    width: 100%;
    max-width: 1000px;
    margin: var(--spacing-2xl) auto;
}

.lesson-card {
    background: var(--background-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.lesson-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.lesson-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.lesson-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

.lesson-card p {
    margin-bottom: var(--spacing-lg);
    color: var(--neutral-gray);
}

/* 地图容器样式 */
.interactive-map-container {
    width: 100%;
    max-width: 800px;
    margin: var(--spacing-xl) auto;
}

.station-map {
    width: 100%;
    height: 400px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.map-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn-map-zoom,
.btn-map-reset {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-map-zoom:hover,
.btn-map-reset:hover {
    background: var(--cool-blue);
    transform: translateY(-1px);
}

.map-info-panel {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-light);
    border-radius: var(--radius-md);
}

/* 图表容器样式 */
.chart-container {
    width: 100%;
    max-width: 800px;
    margin: var(--spacing-xl) auto;
}

.temperature-chart,
.pattern-chart,
.causes-chart {
    width: 100%;
    height: 400px;
    background: var(--background-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.chart-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn-chart-play,
.btn-chart-reset {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-chart-play:hover,
.btn-chart-reset:hover {
    background: var(--success);
    transform: translateY(-1px);
}

.chart-explanation {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-light);
    border-radius: var(--radius-md);
}

/* 颜色编码交互样式 */
.color-code-interactive {
    width: 100%;
    max-width: 800px;
    margin: var(--spacing-xl) auto;
}

.color-scale {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.color-item {
    text-align: center;
    flex: 1;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: var(--radius-md);
}

.color-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.color-box {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.color-practice {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.practice-question {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.temp-data {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--primary-red);
    margin-bottom: var(--spacing-md);
}

.color-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.color-option {
    width: 50px;
    height: 50px;
    border: 3px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
}

.color-option:hover {
    transform: scale(1.1);
    border-color: var(--neutral-gray);
}

.color-option.selected {
    border-color: var(--primary-blue);
    transform: scale(1.1);
}

.feedback-message {
    font-size: var(--font-size-lg);
    font-weight: bold;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.feedback-message.success {
    background: var(--success);
    color: white;
}

.feedback-message.error {
    background: var(--error);
    color: white;
}

/* 模式分析样式 */
.pattern-analysis-container {
    width: 100%;
    max-width: 1000px;
    margin: var(--spacing-xl) auto;
}

.pattern-questions {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-xl);
}

.question-item {
    margin-bottom: var(--spacing-xl);
}

.question-item p {
    font-size: var(--font-size-lg);
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

.answer-options {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.answer-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    background: var(--background-light);
    border: 2px solid var(--neutral-gray);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.answer-btn:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.answer-btn.selected {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* 温室效应模拟样式 */
.greenhouse-simulation {
    width: 100%;
    max-width: 800px;
    margin: var(--spacing-xl) auto;
}

.simulation-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.earth-system {
    position: relative;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #87CEEB, #4682B4);
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
}

.sun-rays {
    position: absolute;
    top: -20px;
    left: -20px;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, #FFD700, #FFA500);
    border-radius: var(--radius-full);
    animation: pulse 2s infinite;
}

.earth {
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, #4CAF50, #2E7D32);
    border-radius: var(--radius-full);
    position: relative;
    z-index: 2;
}

.atmosphere {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    z-index: 1;
}

.greenhouse-gases {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    border: 2px solid rgba(255, 0, 0, 0.3);
    border-radius: var(--radius-full);
    z-index: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.temperature-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.temp-gauge {
    position: relative;
    width: 100px;
    height: 200px;
    background: linear-gradient(to top, var(--primary-red), var(--primary-orange), var(--primary-blue));
    border-radius: var(--radius-full);
    border: 3px solid white;
    box-shadow: var(--shadow-md);
}

.temp-needle {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 80px;
    background: white;
    border-radius: 2px;
    transition: height 0.5s ease;
}

.temp-scale {
    position: absolute;
    right: -30px;
    top: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: white;
}

.temp-value {
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--primary-red);
}

.simulation-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn-add-co2,
.btn-remove-co2,
.btn-reset {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
}

.btn-add-co2 {
    background: var(--error);
}

.btn-remove-co2 {
    background: var(--success);
}

.btn-reset {
    background: var(--neutral-gray);
}

.btn-add-co2:hover,
.btn-remove-co2:hover,
.btn-reset:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.simulation-explanation {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-light);
    border-radius: var(--radius-md);
}

/* 原因分析样式 */
.causes-analysis-container {
    width: 100%;
    max-width: 1000px;
    margin: var(--spacing-xl) auto;
}

.causes-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.cause-item {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    cursor: pointer;
}

.cause-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.cause-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.cause-item h4 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.cause-item p {
    color: var(--neutral-gray);
    margin-bottom: 0;
}

.interactive-question {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.opinion-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.opinion-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    background: var(--background-light);
    border: 2px solid var(--neutral-gray);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.opinion-btn:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* 行动计划样式 */
.action-plan-container {
    width: 100%;
    max-width: 1000px;
    margin: var(--spacing-xl) auto;
}

.action-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.action-category {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.action-category h3 {
    text-align: center;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-lg);
}

.action-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.action-item:hover {
    background: var(--background-light);
}

.action-item input[type="checkbox"] {
    margin-right: var(--spacing-md);
    transform: scale(1.2);
}

.action-item label {
    font-size: var(--font-size-base);
    cursor: pointer;
    flex: 1;
}

.score-display {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.score-circle {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    background: conic-gradient(var(--primary-blue) 0deg, var(--background-light) 0deg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto var(--spacing-lg);
    position: relative;
}

.score-circle::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: white;
    border-radius: var(--radius-full);
}

.score-circle span {
    font-size: var(--font-size-3xl);
    font-weight: bold;
    color: var(--primary-blue);
    z-index: 1;
}

.score-circle small {
    font-size: var(--font-size-sm);
    color: var(--neutral-gray);
    z-index: 1;
}

.score-message {
    font-size: var(--font-size-lg);
    font-weight: bold;
    color: var(--primary-blue);
}

/* 总结页样式 */
.conclusion-content {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.key-messages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.message-item {
    background: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.message-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.message-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.message-item h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.message-item p {
    color: var(--neutral-gray);
    margin-bottom: 0;
}

.final-encouragement {
    text-align: center;
    background: linear-gradient(135deg, #f0f8ff, #e6f3ff);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.final-encouragement h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

/* 结束页样式 */
.slide-ending {
    text-align: center;
    color: white;
}

.ending-content {
    max-width: 800px;
    margin: 0 auto;
}

.completion-animation {
    margin-bottom: var(--spacing-2xl);
}

.celebration-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.completion-message {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.next-steps {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.next-steps h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.next-steps ul {
    list-style: none;
    padding: 0;
}

.next-steps li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: white;
}

.next-steps li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: white;
    font-weight: bold;
}

/* 动画效果 */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.8);
    }
}

/* 辅助样式 */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 课程导航页样式 */
.slide-navigation {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 100vh !important;
    padding: 2vh !important;
}

.navigation-container {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 30px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), 
                0 0 0 2px rgba(255, 255, 255, 0.3);
    padding: 5vh 5vw;
    max-width: 90vw;
    width: 90vw;
    max-height: 90vh;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.navigation-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(120, 119, 198, 0.1), transparent);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

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

.navigation-title {
    font-size: 48pt !important;
    color: #212529 !important;
    margin-bottom: 1vh !important;
    font-weight: bold !important;
    text-shadow: 0 3px 6px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3) !important;
    position: relative;
    z-index: 1;
}

.navigation-subtitle {
    font-size: 36pt !important;
    color: #343A40 !important;
    margin-bottom: 4vh !important;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
}

.lessons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 3vw;
    max-width: 80vw;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.lesson-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    border-radius: 25px;
    padding: 3vh 2vw;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 3px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    min-height: 30vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.lesson-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.lesson-card:hover::before {
    left: 100%;
}

.lesson-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
}

.lesson-card:active {
    transform: translateY(-5px) scale(1.02);
}

.lesson-number {
    font-size: 48pt;
    font-weight: bold;
    color: #2E86AB;
    margin-bottom: 1vh;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.lesson-title {
    font-size: 28pt;
    color: #212529;
    margin-bottom: 2vh;
    font-weight: 500;
    line-height: 1.2;
}

.lesson-icon {
    font-size: 36pt;
    margin-top: 1vh;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* 课程卡片特定颜色 */
.lesson1:hover {
    background: linear-gradient(135deg, rgba(46, 134, 171, 0.2) 0%, rgba(255, 255, 255, 0.8) 100%);
}

.lesson2:hover {
    background: linear-gradient(135deg, rgba(241, 143, 1, 0.2) 0%, rgba(255, 255, 255, 0.8) 100%);
}

.lesson3:hover {
    background: linear-gradient(135deg, rgba(56, 142, 60, 0.2) 0%, rgba(255, 255, 255, 0.8) 100%);
}

.lesson4:hover {
    background: linear-gradient(135deg, rgba(211, 47, 47, 0.2) 0%, rgba(255, 255, 255, 0.8) 100%);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 2vw;
    }
    
    .lesson-card {
        min-height: 25vh;
        padding: 2vh 1.5vw;
    }
    
    .lesson-number {
        font-size: 42pt;
    }
    
    .lesson-title {
        font-size: 24pt;
    }
    
    .lesson-icon {
        font-size: 32pt;
    }
}

@media (max-width: 768px) {
    .navigation-container {
        padding: 2vh;
        margin: 2vh;
        aspect-ratio: 16/9;
        width: 90%;
        max-width: none;
    }
    
    .navigation-title {
        font-size: 36pt !important;
    }

    .navigation-subtitle {
        font-size: 28pt !important;
    }
    
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        max-width: 90vw;
        gap: 2vh;
    }
    
    .lesson-card {
        min-height: 18vh;
        padding: 1.5vh 1.5vw;
    }
    
    .lesson-number {
        font-size: 32pt;
        margin-bottom: 1vh;
    }
    
    .lesson-title {
        font-size: 18pt;
        margin-bottom: 1vh;
    }
    
    .lesson-icon {
        font-size: 24pt;
    }
}

/* 响应式样式将在 responsive.css 中定义 */

/* 温度知识卡片样式 */
.temperature-knowledge-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.knowledge-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 16px;
    padding: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.knowledge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-orange));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.knowledge-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-blue);
}

.knowledge-card:hover::before {
    opacity: 1;
}

.card-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(46, 134, 171, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.knowledge-card:hover .card-icon {
    background: rgba(46, 134, 171, 0.2);
    transform: scale(1.1);
}

.card-content {
    flex: 1;
}

.card-content h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-blue);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.3;
}

.card-content p {
    font-size: var(--font-size-base);
    color: var(--neutral-gray);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.5;
}

.real-examples {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.example-tag {
    background: linear-gradient(135deg, var(--primary-orange), #FF8A50);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(241, 143, 1, 0.3);
}

/* 特定卡片的颜色主题 */
.concept-card .card-icon {
    background: rgba(74, 144, 226, 0.1);
}

.freezing-card .card-icon {
    background: rgba(135, 206, 235, 0.1);
}

.body-temp-card .card-icon {
    background: rgba(255, 179, 71, 0.1);
}

.boiling-card .card-icon {
    background: rgba(255, 107, 107, 0.1);
}

/* 温度对比图表样式 */
.temperature-comparison-chart {
    margin: var(--spacing-2xl) 0;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 20px;
    border: 2px solid #dee2e6;
}

.temperature-comparison-chart h4 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-blue);
    text-align: center;
    margin: 0 0 var(--spacing-md) 0;
}

.chart-instruction {
    color: var(--neutral-gray);
    font-size: var(--font-size-lg);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-style: italic;
}

.temp-scale-visual {
    max-width: 800px;
    margin: 0 auto;
}

.scale-container {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.temperature-bar {
    position: relative;
    height: 20px;
    background: linear-gradient(90deg, 
        #87CEEB 0%, 
        #4A90E2 25%, 
        #FFB347 50%, 
        #FF6B6B 75%, 
        #D32F2F 100%);
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    margin: var(--spacing-xl) 0;
}

.temp-marker {
    position: absolute;
    top: -30px;
    transform: translateX(-50%);
}

.interactive-marker {
    cursor: pointer;
    transition: all 0.3s ease;
}

.interactive-marker:hover {
    transform: translateX(-50%) scale(1.1);
}

.interactive-marker:active {
    transform: translateX(-50%) scale(0.95);
}

.temp-marker.freezing {
    left: 0%;
}

.temp-marker.room {
    left: 25%;
}

.temp-marker.body {
    left: 37%;
}

.temp-marker.boiling {
    left: 100%;
}

.marker-dot {
    width: 16px;
    height: 16px;
    background: white;
    border: 3px solid var(--primary-blue);
    border-radius: 50%;
    margin: 0 auto var(--spacing-xs) auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.interactive-marker:hover .marker-dot {
    width: 20px;
    height: 20px;
    border-width: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.marker-label {
    text-align: center;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.interactive-marker:hover .marker-label {
    transform: translateY(-2px);
}

.temp-value {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 2px;
}

.temp-name {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--neutral-gray);
    font-weight: 600;
}

.scale-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--neutral-gray);
}

/* 大屏幕优化 */
@media (min-width: 1200px) {
    .temperature-knowledge-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }
    
    .knowledge-card {
        padding: var(--spacing-2xl);
        min-height: 140px;
    }
    
    .card-icon {
        width: 100px;
        height: 100px;
    }
    
    .card-content h4 {
        font-size: var(--font-size-2xl);
    }
    
    .card-content p {
        font-size: var(--font-size-lg);
    }
    
    .example-tag {
        font-size: var(--font-size-base);
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .temperature-comparison-chart {
        padding: var(--spacing-3xl);
    }
    
    .temperature-comparison-chart h4 {
        font-size: var(--font-size-3xl);
    }
    
    .temp-value {
        font-size: var(--font-size-xl);
    }
    
    .temp-name {
        font-size: var(--font-size-base);
    }
    
    .scale-labels {
        font-size: var(--font-size-xl);
    }
}

/* 超大屏幕优化（教室投影） */
@media (min-width: 1600px) {
    .temperature-knowledge-cards {
        gap: var(--spacing-3xl);
    }
    
    .knowledge-card {
        padding: var(--spacing-3xl);
        min-height: 180px;
    }
    
    .card-icon {
        width: 120px;
        height: 120px;
    }
    
    .card-content h4 {
        font-size: var(--font-size-3xl);
    }
    
    .card-content p {
        font-size: var(--font-size-xl);
    }
    
    .example-tag {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .temperature-comparison-chart h4 {
        font-size: var(--font-size-4xl);
    }
    
    .temperature-bar {
        height: 30px;
        border-radius: 15px;
    }
    
    .marker-dot {
        width: 20px;
        height: 20px;
        border-width: 4px;
    }
    
    .temp-value {
        font-size: var(--font-size-2xl);
    }
    
    .temp-name {
        font-size: var(--font-size-lg);
    }
    
    .scale-labels {
        font-size: var(--font-size-2xl);
    }
}

/* 第1课第3页新布局样式 */
.lesson1-slide3-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 40px;
    box-sizing: border-box;
}

.lesson1-slide3-intro {
    flex: 0 0 auto;
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.lesson1-slide3-intro h2 {
    font-size: 42px;
    font-weight: 700;
    color: #212529;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.lesson1-slide3-intro p {
    font-size: 24px;
    line-height: 1.6;
    color: #495057;
    max-width: 800px;
    margin: 0 auto;
    font-weight: 500;
}

/* 主要温度卡片容器 */
.main-temperature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: stretch;
    margin-top: 30px;
    padding: 0 20px;
}

/* 温度卡片样式 */
.temperature-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 3px solid #e9ecef;
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: all 0.4s ease;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.temperature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.temperature-card:hover::before {
    opacity: 1;
}

.temperature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.temperature-card .card-icon svg {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.temperature-card h3 {
    font-size: 28px;
    font-weight: 700;
    margin: 16px 0;
    color: #212529;
}

.temperature-card .temperature-value {
    font-size: 48px;
    font-weight: 800;
    margin: 20px 0;
    padding: 16px 24px;
    border-radius: 16px;
    display: inline-block;
    min-width: 140px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.temperature-card .card-description {
    font-size: 18px;
    color: #6c757d;
    line-height: 1.6;
    margin-top: 16px;
    font-weight: 500;
}

/* 冰点卡片样式 */
.freezing-card::before {
    background: linear-gradient(90deg, #2196f3, #03a9f4, #00bcd4);
}

.freezing-card:hover {
    border-color: #2196f3;
}

.freezing-card .card-icon svg {
    fill: #2196f3;
}

.freezing-card .temperature-value {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: #0d47a1;
    border: 3px solid #2196f3;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

/* 体温卡片样式 */
.body-temp-card::before {
    background: linear-gradient(90deg, #ff9800, #ffc107, #ffeb3b);
}

.body-temp-card:hover {
    border-color: #ff9800;
}

.body-temp-card .card-icon svg {
    fill: #ff9800;
}

.body-temp-card .temperature-value {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    color: #e65100;
    border: 3px solid #ff9800;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.3);
}

/* 沸点卡片样式 */
.boiling-card::before {
    background: linear-gradient(90deg, #f44336, #e91e63, #9c27b0);
}

.boiling-card:hover {
    border-color: #f44336;
}

.boiling-card .card-icon svg {
    fill: #f44336;
}

.boiling-card .temperature-value {
    background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%);
    color: #c62828;
    border: 3px solid #f44336;
    box-shadow: 0 4px 15px rgba(244, 67, 54, 0.3);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .main-temperature-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        padding: 0 15px;
    }
    
    .lesson1-slide3-container {
        padding: 20px;
    }
    
    .lesson1-temp-card {
        padding: 20px;
    }
    
    .lesson1-temp-card .temperature {
        font-size: 40px;
    }
    
    .lesson1-temp-card h3 {
        font-size: 24px;
    }
    
    .lesson1-temp-card .icon {
        font-size: 56px;
    }
}

@media (max-width: 900px) {
    .main-temperature-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
        padding: 0 10px;
    }
    
    .lesson1-temp-card {
        padding: 15px;
    }
    
    .temperature-card .temperature-value {
        font-size: 36px;
        padding: 12px 18px;
    }
    
    .temperature-card h3 {
        font-size: 20px;
    }
    
    .temperature-card .card-icon svg {
        width: 48px;
        height: 48px;
    }
    
    .temperature-card .card-description {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .lesson1-slide3-intro h2 {
        font-size: 32px;
    }
    
    .lesson1-slide3-intro p {
        font-size: 20px;
    }
    
    .main-temperature-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
        padding: 0 8px;
    }
    
    .temperature-card {
        padding: 12px;
    }
    
    .temperature-card .temperature-value {
        font-size: 32px;
        padding: 10px 15px;
    }
    
    .temperature-card h3 {
        font-size: 18px;
        margin: 12px 0;
    }
    
    .temperature-card .card-icon svg {
        width: 40px;
        height: 40px;
        margin-bottom: 15px;
    }
    
    .temperature-card .card-description {
        font-size: 14px;
    }
}

/* 只有在非常小的屏幕上才改为单列 */
@media (max-width: 480px) {
    .main-temperature-cards {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 10px;
    }
    
    .temperature-card {
        padding: 20px;
    }
    
    .temperature-card .temperature-value {
        font-size: 36px;
    }
    
    .temperature-card h3 {
        font-size: 22px;
    }
    
    .temperature-card .card-icon svg {
        width: 48px;
        height: 48px;
    }
}