/* 伯努利原理儿童故事书样式 */

:root {
  --primary-color: #4a90e2;
  --secondary-color: #f9a826;
  --background-color: #f0f9ff;
  --text-color: #333;
  --accent-color: #ff6b6b;
  --success-color: #66bb6a;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Yuanti SC', 'Yuanti', 'Comic Sans MS', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
}

header {
  text-align: center;
  padding: 20px 0;
  margin-bottom: 30px;
  background-color: white;
  border-radius: 15px;
  box-shadow: 0 4px 15px var(--shadow-color);
}

h1 {
  color: var(--primary-color);
  font-size: 2.5rem;
  margin-bottom: 10px;
}

h2 {
  color: var(--secondary-color);
  font-size: 1.8rem;
  margin-bottom: 15px;
}

.intro {
  text-align: center;
  margin-bottom: 30px;
  font-size: 1.2rem;
}

.storybook {
  position: relative;
  background-color: white;
  border-radius: 15px;
  box-shadow: 0 4px 15px var(--shadow-color);
  overflow: hidden;
  min-height: 600px;
}

.page {
  display: none;
  padding: 30px;
  transition: opacity 0.5s ease;
}

.page.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.image-container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 10px var(--shadow-color);
}

.story-image {
  width: 100%;
  height: auto;
  display: block;
}

.story-text {
  font-size: 1.2rem;
  line-height: 1.8;
  margin: 20px 0;
  text-align: left;
}

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

.nav-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50px;
  padding: 12px 25px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-button:hover {
  background-color: #3a7bc8;
  transform: translateY(-2px);
}

.nav-button:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
  transform: none;
}

.audio-button {
  background-color: var(--secondary-color);
  color: white;
  border: none;
  border-radius: 50px;
  padding: 12px 25px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 20px auto;
}

.audio-button:hover {
  background-color: #e89921;
  transform: translateY(-2px);
}

.audio-button i {
  font-size: 1.2rem;
}

.page-indicator {
  text-align: center;
  margin-top: 20px;
  font-size: 1rem;
  color: #777;
}

.dots-container {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
}

.dot {
  width: 12px;
  height: 12px;
  background-color: #ddd;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active {
  background-color: var(--primary-color);
  transform: scale(1.2);
}

footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  color: #777;
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .story-text {
    font-size: 1.1rem;
  }
  
  .page {
    padding: 20px;
  }
}

/* 动画效果 */
.floating {
  animation: floating 3s ease-in-out infinite;
}

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

/* 辅助功能 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* 自动翻页开关样式 */
.auto-advance-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0;
}

.auto-advance-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  cursor: pointer;
}

.auto-advance-toggle label {
  font-size: 1rem;
  cursor: pointer;
  color: var(--primary-color);
}

/* 打印样式 */
@media print {
  .nav-button, .audio-button, .dots-container, .auto-advance-toggle {
    display: none;
  }
  
  .page {
    display: block;
    page-break-after: always;
    min-height: auto;
  }
  
  .storybook {
    box-shadow: none;
  }
}