/* 主色调与配色方案 */
  :root {
    --primary-color: #0074D9; /* 科技蓝 */
    --secondary-color: #808080; /* 金属灰 */
    --accent-color: #FF6F61; /* 亮橙色 */
    --highlight-color: #3CB371; /* 翡翠绿 */
    --background-gradient: linear-gradient(135deg, #0074D9, #808080);
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    --transition-speed: 0.3s;
  }

  /* 全局样式 */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    font-family: var(--font-secondary);
    background: var(--background-gradient);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
  }

  a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-speed);
  }

  a:hover {
    color: var(--highlight-color);
  }

  /* 导航栏 */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.7);
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all var(--transition-speed);
  }

  .navbar.scrolled {
    padding: 10px 40px;
    background: rgba(0, 0, 0, 0.9);
  }

  .navbar .logo {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    color: var(--accent-color);
  }

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

  .navbar ul li a {
    font-family: var(--font-primary);
    font-size: 1rem;
    color: #ffffff;
    position: relative;
  }

  .navbar ul li a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width var(--transition-speed);
  }

  .navbar ul li a:hover::after {
    width: 100%;
  }

  /* 头部区域 */
  .hero {
    height: 100vh;
    background: radial-gradient(circle, rgba(255, 87, 34, 0.7), transparent);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: aurora-move 15s linear infinite;
    padding: 0 20px;
  }

  .hero-content {
    text-align: center;
    max-width: 800px;
  }

  .hero h1 {
    font-family: var(--font-primary);
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--accent-color);
  }

  .hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
  }

  .hero .cta-button {
    padding: 15px 30px;
    background: var(--highlight-color);
    border: none;
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 1rem;
    color: #ffffff;
    cursor: pointer;
    transition: background var(--transition-speed), transform var(--transition-speed);
  }

  .hero .cta-button:hover {
    background: var(--accent-color);
    transform: scale(1.05);
  }

  /* 特色功能 */
  .features {
    padding: 100px 20px;
    background: #ffffff;
    color: #333333;
  }

  .features h2 {
    text-align: center;
    font-family: var(--font-primary);
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--primary-color);
  }

  .features .feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .feature-item {
    background: #f5f5f5;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  }

  .feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }

  .feature-item img {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
  }

  .feature-item h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
  }

  .feature-item p {
    font-size: 1rem;
  }

  /* 示例展示 */
  .example-section {
    padding: 100px 20px;
    background: #f0f0f0;
    color: #333333;
  }

  .example-section h2 {
    text-align: center;
    font-family: var(--font-primary);
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--primary-color);
  }

  .example-section article {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }

  .example-section article h2,
  .example-section article h3 {
    font-family: var(--font-primary);
    color: var(--primary-color);
  }

  .example-section article pre {
    background: #2d2d2d;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
  }

  .example-section article code {
    color: #f8f8f2;
    font-family: 'Courier New', Courier, monospace;
  }

  /* 图片展示 */
  .image-gallery {
    padding: 100px 20px;
    background: #ffffff;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
  }

  .image-gallery img {
    width: 320px;
    height: 320px;
    object-fit: cover;
    border-radius: 10px;
  }

  /* 提示文字 */
  .reference-note {
    text-align: center;
    padding: 50px 20px;
    background: #333333;
    color: #ffffff;
    font-size: 1.2rem;
  }

  /* 页脚 */
  .footer {
    padding: 20px;
    background: rgba(0, 0, 0, 0.9);
    text-align: center;
    color: #ffffff;
    font-size: 0.9rem;
  }

  /* 动画定义 */
  @keyframes aurora-move {
    0% {
      background-position: 0% 50%;
    }
    50% {
      background-position: 100% 50%;
    }
    100% {
      background-position: 0% 50%;
    }
  }

  /* 响应式设计 */
  @media (max-width: 1440px) {
    .hero h1 {
      font-size: 2.5rem;
    }
    .features h2,
    .example-section h2 {
      font-size: 2rem;
    }
  }

  @media (max-width: 1200px) {
    .navbar {
      padding: 15px 30px;
    }
    .features .feature-list {
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    .image-gallery img {
      width: 280px;
      height: 280px;
    }
  }

  @media (max-width: 1024px) {
    .navbar ul {
      display: none;
    }
    .navbar .menu-icon {
      display: block;
      cursor: pointer;
      font-size: 1.5rem;
      color: #ffffff;
    }
    .navbar.active ul {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: 60px;
      right: 40px;
      background: rgba(0, 0, 0, 0.9);
      padding: 20px;
      border-radius: 10px;
    }
    .image-gallery img {
      width: 100%;
      height: auto;
    }
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2rem;
    }
    .features h2,
    .example-section h2 {
      font-size: 1.8rem;
    }
    .features .feature-list {
      grid-template-columns: 1fr;
    }
    .navbar {
      padding: 10px 20px;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 1.5rem;
    }
    .hero p {
      font-size: 1rem;
    }
    .features h2,
    .example-section h2 {
      font-size: 1.5rem;
    }
    .feature-item img {
      width: 80px;
      height: 80px;
    }
    .image-gallery img {
      width: 100%;
      height: auto;
    }
  }

  @media (max-width: 320px) {
    .hero h1 {
      font-size: 1.2rem;
    }
    .hero p {
      font-size: 0.9rem;
    }
    .features h2,
    .example-section h2 {
      font-size: 1.2rem;
    }
    .cta-button {
      padding: 10px 20px;
      font-size: 0.9rem;
    }
  }