/* 全局样式定义 */

/* 设置页面的背景色和字体 */
body {
  margin: 0;
  padding: 0;
  font-family: 'Roboto', 'Open Sans', sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #ffffff;
  line-height: 1.6;
  font-size: 16px;
}

/* 使页面响应式 */
.container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 导航栏样式 */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(32, 58, 67, 0.9);
  padding: 20px;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .logo {
  font-size: 1.8em;
  color: #ff8c00;
  text-decoration: none;
}

.navbar .nav-links {
  display: flex;
  gap: 20px;
}

.navbar .nav-links a {
  color: #ffffff;
  text-decoration: none;
  position: relative;
  padding: 5px 0;
}

.navbar .nav-links a::after {
  content: '';
  display: block;
  width: 0;
  height: 2px;
  background: #ff8c00;
  transition: width 0.3s;
  position: absolute;
  bottom: 0;
  left: 0;
}

.navbar .nav-links a:hover::after {
  width: 100%;
}

/* 菜单切换按钮样式 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5em;
  cursor: pointer;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .navbar .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: rgba(32, 58, 67, 0.95);
    position: absolute;
    top: 60px;
    left: 0;
    padding: 10px 0;
  }

  .navbar .nav-links.active {
    display: flex;
  }

  .navbar .nav-links a {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
}

/* 主内容区样式 */
.main-content {
  padding: 100px 20px 20px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* 章节导航样式 */
.chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.chapter-nav a {
  background-color: #ff8c00;
  color: #ffffff;
  padding: 10px 15px;
  border-radius: 5px;
  text-decoration: none;
  transition: background-color 0.3s;
}

.chapter-nav a:hover {
  background-color: #ffa500;
}

/* 文章内容样式 */
article h2 {
  font-size: 2em;
  color: #ffa500;
  margin-top: 40px;
  position: relative;
}

article h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background-color: #ffffff;
  margin-top: 10px;
  border-radius: 2px;
}

article h3 {
  font-size: 1.5em;
  color: #00ff00;
  margin-top: 30px;
}

article p {
  margin: 20px 0;
  text-align: justify;
}

article pre {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 20px 0;
}

article pre code {
  color: #ff8c00;
  font-family: 'Courier New', Courier, monospace;
}

/* 图片样式 */
.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.image-gallery img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  transition: transform 0.3s, box-shadow 0.3s;
}

.image-gallery img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

/* 代码示例块样式 */
.code-example {
  background-color: #2c5364;
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
}

.code-example code {
  display: block;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: #00ff00;
  font-family: 'Courier New', Courier, monospace;
}

/* 强调文字样式 */
strong {
  color: #ffa500;
}

/* 链接样式 */
a {
  color: #00ff00;
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: #ff8c00;
}

/* 按钮样式 */
.button-primary {
  background-color: #ff8c00;
  color: #ffffff;
  padding: 15px 25px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.3s;
}

.button-primary:hover {
  background-color: #ffa500;
  transform: scale(1.05);
}

/* 折叠区域样式 */
.collapsible {
  background-color: rgba(255, 140, 0, 0.1);
  color: #ffffff;
  cursor: pointer;
  padding: 10px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 1em;
  margin: 10px 0;
  border-radius: 5px;
  transition: background-color 0.3s;
}

.collapsible:hover {
  background-color: rgba(255, 140, 0, 0.2);
}

.content {
  padding: 0 15px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: rgba(255, 140, 0, 0.05);
  border-radius: 5px;
}

/* 提示文字样式 */
.prominent-text {
  text-align: center;
  font-size: 1.8em;
  color: #ffffff;
  margin: 40px 0;
  animation: fadeIn 2s ease-in-out;
}

/* 关键帧动画 */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 表格样式 */
.table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.table thead {
  background-color: #ff8c00;
}

.table th, .table td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.table tr:hover {
  background-color: rgba(255, 140, 0, 0.1);
}

/* 响应式图片调整 */
@media (max-width: 768px) {
  .image-gallery {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .navbar {
    padding: 15px;
  }

  .main-content {
    padding: 80px 10px 10px 10px;
  }

  .chapter-nav a {
    padding: 8px 12px;
    font-size: 0.9em;
  }
}

/* 结束全局样式 */