/* 全局样式设置 */
/* 定义CSS变量，便于统一管理颜色和字体 */
:root {
  /* 主色调 - 深蓝色 */
  --primary-color: #003366;
  /* 辅助色 - 灰色 */
  --secondary-color: #666666;
  /* 点缀色 - 亮橙色 */
  --accent-color: #ff6600;
  /* 背景渐变色 */
  --background-gradient: linear-gradient(to bottom, #f0f0f0, #cccccc);
  /* 字体 */
  --font-title: 'Roboto', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  /* 响应式断点 */
  --breakpoint-mobile: 768px;
  --breakpoint-tablet: 1200px;
}

/* 设置全局字体和背景 */
body {
  margin: 0;
  padding: 0;
  background: var(--background-gradient);
  font-family: var(--font-body);
  color: var(--secondary-color);
  line-height: 1.6;
  scroll-behavior: smooth;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar .logo {
  font-family: var(--font-title);
  font-size: 1.5rem;
  color: var(--primary-color);
  text-decoration: none;
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

.navbar ul li a {
  text-decoration: none;
  color: var(--secondary-color);
  font-size: 1rem;
  transition: color 0.3s ease;
}

.navbar ul li a:hover {
  color: var(--accent-color);
}

/* 移动设备导航菜单 */
.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: var(--breakpoint-mobile)) {
  .navbar ul {
    display: none;
    flex-direction: column;
    background-color: #ffffff;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    padding: 20px 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .navbar ul.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
    color: var(--secondary-color);
  }
}

/* 主要内容区域 */
.container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 100px 30px 50px 30px; /* 顶部留出导航栏空间 */
  max-width: 1920px;
  margin: 0 auto;
}

/* 响应式布局调整 */
@media (max-width: var(--breakpoint-tablet)) {
  .container {
    padding: 80px 20px 40px 20px;
  }
}

@media (max-width: 500px) {
  .container {
    padding: 60px 10px 30px 10px;
  }
}

/* 文章内容样式 */
article {
  flex: 1 1 100%;
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  color: var(--primary-color);
  margin-top: 20px;
  margin-bottom: 10px;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

p {
  font-size: 1rem;
  margin-bottom: 20px;
}

/* 代码块样式 */
pre {
  background-color: #f5f5f5;
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

code {
  font-family: 'Courier New', Courier, monospace;
  color: var(--primary-color);
}

/* 图片样式 */
img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

/* 强调文本 */
span {
  color: var(--primary-color);
  font-weight: bold;
}

/* 按钮样式 */
.button {
  background-color: var(--accent-color);
  color: #ffffff;
  padding: 10px 25px;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.button:hover {
  background-color: #e65c00;
  transform: scale(1.05);
}

/* 轮播区样式 */
.carousel {
  display: flex;
  overflow: hidden;
  position: relative;
  width: 100%;
  padding: 40px 0;
  background-color: #f9f9f9;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.carousel-item {
  min-width: 100%;
  box-sizing: border-box;
  padding: 20px;
  text-align: center;
}

.carousel-item p {
  font-style: italic;
  color: var(--secondary-color);
}

/* 轮播控制按钮 */
.carousel-button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--accent-color);
  border: none;
  padding: 10px;
  cursor: pointer;
  border-radius: 50%;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.carousel-button:hover {
  opacity: 1;
}

.carousel-button.prev {
  left: 10px;
}

.carousel-button.next {
  right: 10px;
}

/* 聊天工具样式 */
.chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 300px;
  height: 400px;
  background-color: #ffffff;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.chat-widget.hidden {
  transform: translateY(100%);
}

.chat-header {
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 15px;
  text-align: center;
  font-weight: bold;
}

.chat-body {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
}

.chat-footer {
  padding: 15px;
  background-color: #f0f0f0;
}

.chat-footer input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

/* 模块过渡与动画 */
.module {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s forwards;
}

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

.section {
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.section.hidden {
  opacity: 0;
  transform: scale(0.95);
}

.section.visible {
  opacity: 1;
  transform: scale(1);
}

/* 引导区样式 */
.intro-section {
  background: var(--primary-color);
  color: #ffffff;
  padding: 50px 30px;
  text-align: center;
  border-radius: 10px;
  margin-bottom: 40px;
}

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

.intro-section p {
  font-size: 1.2rem;
}

/* 折叠内容样式 */
.collapsible {
  background-color: #e0e0e0;
  color: var(--secondary-color);
  cursor: pointer;
  padding: 15px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 1rem;
  transition: background-color 0.3s ease;
  border-radius: 5px;
  margin-bottom: 10px;
}

.active, .collapsible:hover {
  background-color: var(--accent-color);
  color: #ffffff;
}

.content {
  padding: 0 15px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: #f9f9f9;
  border-radius: 5px;
  margin-bottom: 20px;
}

.content p {
  padding: 15px 0;
}

/* 高亮代码块样式 */
.code-example {
  background-color: #2d2d2d;
  color: #cccccc;
  padding: 15px;
  border-radius: 8px;
  font-family: 'Courier New', Courier, monospace;
  overflow-x: auto;
  margin-bottom: 20px;
}

.code-example:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 底部样式 */
.footer {
  background-color: #333333;
  color: #ffffff;
  text-align: center;
  padding: 30px 20px;
  position: relative;
}

.footer .partners {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.footer .partners img {
  width: 100px;
  height: auto;
  border-radius: 5px;
  transition: transform 0.3s ease;
}

.footer .partners img:hover {
  transform: scale(1.05);
}

.footer p {
  font-size: 0.9rem;
}

/* 提示文字样式 */
.reference-note {
  position: fixed;
  top: 80px;
  right: 20px;
  background-color: var(--accent-color);
  color: #ffffff;
  padding: 10px 15px;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  font-size: 0.9rem;
}