/* 全域樣式 */
:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --accent-color: #e74c3c;
  --background-color: #f9f9f9;
  --text-color: #333;
  --light-gray: #ecf0f1;
  --dark-gray: #7f8c8d;
  --shadow: 0 2px 5px rgba(0,0,0,0.1);
  --border-radius: 8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans TC', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 導航欄 */
header {
  background-color: white;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 20px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 英雄區塊 */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 30px;
}

.btn {
  display: inline-block;
  background-color: white;
  color: var(--primary-color);
  padding: 12px 24px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* 課程卡片 */
.courses {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
  font-size: 2rem;
  color: var(--primary-color);
}

.course-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.course-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
}

.course-card:hover {
  transform: translateY(-10px);
}

.course-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.course-content {
  padding: 20px;
}

.course-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.course-desc {
  color: var(--dark-gray);
  margin-bottom: 15px;
}

.course-btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 8px 16px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.3s;
}

.course-btn:hover {
  background-color: #2980b9;
}

/* 特色區塊 */
.features {
  background-color: var(--light-gray);
  padding: 80px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-item {
  text-align: center;
  padding: 30px;
}

.feature-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 15px;
}

/* 術語表 */
.terminology {
  padding: 80px 0;
}

.term-search {
  margin-bottom: 30px;
  display: flex;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.term-search input {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  font-size: 1rem;
}

.term-search button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0 20px;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  cursor: pointer;
}

.term-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.term-item {
  background-color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.term-chinese {
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.term-english {
  color: var(--dark-gray);
  font-style: italic;
}

/* 課程內容頁面 */
.course-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 30px;
  padding: 50px 0;
}

.sidebar {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 100px;
  height: fit-content;
}

.sidebar-title {
  font-size: 1.2rem;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--light-gray);
}

.sidebar-links {
  list-style: none;
}

.sidebar-links li {
  margin-bottom: 10px;
}

.sidebar-links a {
  text-decoration: none;
  color: var(--text-color);
  display: block;
  padding: 8px 10px;
  border-radius: var(--border-radius);
  transition: all 0.3s;
}

.sidebar-links a:hover, .sidebar-links a.active {
  background-color: var(--light-gray);
  color: var(--primary-color);
}

.course-content-main {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.course-header {
  margin-bottom: 30px;
}

.course-header h1 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.course-section {
  margin-bottom: 40px;
}

.course-section h2 {
  font-size: 1.5rem;
  color: var(--secondary-color);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--light-gray);
}

.course-section p {
  margin-bottom: 15px;
}

.course-section ul, .course-section ol {
  margin-bottom: 15px;
  padding-left: 20px;
}

.course-section li {
  margin-bottom: 8px;
}

.course-image {
  max-width: 100%;
  border-radius: var(--border-radius);
  margin: 20px 0;
}

/* 測驗頁面 */
.quiz-container {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow);
  max-width: 800px;
  margin: 50px auto;
}

.quiz-header {
  text-align: center;
  margin-bottom: 30px;
}

.quiz-header h1 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.quiz-instructions {
  background-color: var(--light-gray);
  padding: 15px;
  border-radius: var(--border-radius);
  margin-bottom: 30px;
}

.quiz-instructions p {
  margin-bottom: 5px;
}

.quiz-question {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--light-gray);
}

.question-text {
  font-weight: bold;
  margin-bottom: 15px;
}

.quiz-options {
  list-style: none;
}

.quiz-option {
  margin-bottom: 10px;
  padding: 10px 15px;
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color 0.3s;
}

.quiz-option:hover {
  background-color: #e0e0e0;
}

.quiz-option.selected {
  background-color: var(--primary-color);
  color: white;
}

.quiz-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
}

.quiz-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.3s;
}

.quiz-btn:hover {
  background-color: #2980b9;
}

.quiz-btn.secondary {
  background-color: var(--light-gray);
  color: var(--text-color);
}

.quiz-btn.secondary:hover {
  background-color: #e0e0e0;
}

.quiz-results {
  text-align: center;
  padding: 30px;
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  margin-top: 30px;
}

.quiz-score {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.quiz-feedback {
  margin-bottom: 20px;
}

.review-points {
  text-align: left;
  background-color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  margin-top: 20px;
}

.review-points h3 {
  margin-bottom: 15px;
  color: var(--primary-color);
}

.review-points ul {
  padding-left: 20px;
}

.review-points li {
  margin-bottom: 8px;
}

/* 頁腳 */
footer {
  background-color: #2c3e50;
  color: white;
  padding: 50px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-column h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #34495e;
}

/* 響應式設計 */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow);
    transform: translateY(-150%);
    transition: transform 0.3s;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .nav-links li {
    margin: 0 0 15px 0;
  }

  .course-container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    margin-bottom: 30px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }
}

/* 動畫 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}

/* 投影片樣式 */
.slide-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 30px;
}

.slide-controls {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
}

.slide-content {
  min-height: 400px;
}

.slide-content img {
  max-width: 100%;
  max-height: 300px;
  display: block;
  margin: 20px auto;
}

.slide-content h1 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.slide-content h2 {
  font-size: 1.5rem;
  color: var(--secondary-color);
  margin: 20px 0 15px;
}

.slide-content ul, .slide-content ol {
  padding-left: 20px;
  margin-bottom: 15px;
}

.slide-content li {
  margin-bottom: 8px;
}

.slide-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.slide-content th, .slide-content td {
  border: 1px solid var(--light-gray);
  padding: 10px;
  text-align: left;
}

.slide-content th {
  background-color: var(--light-gray);
}

/* 心智圖展示 */
.mindmap-container {
  text-align: center;
  margin: 40px 0;
}

.mindmap-image {
  max-width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.mindmap-caption {
  margin-top: 15px;
  color: var(--dark-gray);
  font-style: italic;
}