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

  /* CSS变量定义 */
  :root {
      --primary-color: #003f5c; /* 深蓝色 */
      --secondary-color: #32a852; /* 墨绿色 */
      --light-color: #ffffff; /* 白色 */
      --accent-color: #ff7f50; /* 亮黄色 */
      --background-gradient: radial-gradient(circle, rgba(255,87,34,1) 0%, rgba(255,87,34,0) 70%);
      --font-family: 'Roboto', sans-serif;
      --transition-speed: 0.3s;
  }

  /* 全局字体和背景 */
  body {
      font-family: var(--font-family);
      line-height: 1.6;
      color: var(--light-color);
      background: radial-gradient(circle, rgba(0,63,92,1) 0%, rgba(50,168,82,1) 100%);
      background-size: cover;
      background-attachment: fixed;
      padding: 20px;
  }

  /* 头部样式 */
  header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 40px;
      background: rgba(0, 0, 0, 0.5);
      border-radius: 10px;
      margin-bottom: 40px;
  }

  header h1 {
      font-size: 1.5rem;
      font-weight: bold;
      color: var(--light-color);
  }

  nav a {
      margin-left: 20px;
      text-decoration: none;
      color: var(--light-color);
      font-weight: 500;
      transition: color var(--transition-speed);
  }

  nav a:hover {
      color: var(--accent-color);
  }

  /* 英雄区样式 */
  .hero-section {
      height: 100vh;
      background-image: url('https://images.gptkong.com/demo/sample1.png');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: var(--light-color);
      border-radius: 15px;
      animation: aurora-move 15s linear infinite;
  }

  .hero-section::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--background-gradient);
      opacity: 0.6;
      border-radius: 15px;
  }

  .hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
      padding: 20px;
  }

  .hero-content h2 {
      font-size: 3rem;
      margin-bottom: 20px;
      font-weight: bold;
      color: var(--light-color);
  }

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

  .cta-button {
      background-color: var(--accent-color);
      color: var(--light-color);
      padding: 15px 30px;
      border: none;
      border-radius: 50px;
      font-size: 1rem;
      cursor: pointer;
      transition: transform var(--transition-speed), box-shadow var(--transition-speed);
      text-decoration: none;
  }

  .cta-button:hover {
      transform: scale(1.1);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

  /* 主要内容区 */
  .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 40px 20px;
  }

  .grid-container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
      margin-bottom: 40px;
  }

  .card {
      background: rgba(255, 255, 255, 0.1);
      padding: 20px;
      border-radius: 10px;
      box-shadow: 0 4px 6px rgba(0,0,0,0.1);
      transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  }

  .card:hover {
      transform: translateY(-10px);
      box-shadow: 0 12px 24px rgba(0,0,0,0.2);
  }

  .card h3 {
      margin-bottom: 15px;
      color: var(--accent-color);
      font-size: 1.5rem;
  }

  .card p {
      font-size: 1rem;
      margin-bottom: 10px;
  }

  .card .progress {
      background: rgba(255, 255, 255, 0.2);
      border-radius: 5px;
      overflow: hidden;
      height: 10px;
      margin-bottom: 10px;
  }

  .card .progress-bar {
      height: 100%;
      background-color: var(--accent-color);
      width: 25%; /* 动态调整 */
      transition: width var(--transition-speed);
  }

  .card .recommendation {
      font-weight: bold;
      color: var(--light-color);
  }

  /* 示例数据展示 */
  .data-section {
      margin-bottom: 40px;
  }

  .data-section h2 {
      font-size: 2rem;
      margin-bottom: 20px;
      color: var(--light-color);
  }

  /* 示例展示文章 */
  .example-article {
      background: rgba(255, 255, 255, 0.1);
      padding: 20px;
      border-radius: 10px;
      margin-bottom: 40px;
      color: var(--light-color);
  }

  .example-article h2 {
      font-size: 2rem;
      margin-bottom: 20px;
      color: var(--accent-color);
  }

  .example-article h3 {
      font-size: 1.5rem;
      margin-bottom: 15px;
      color: var(--accent-color);
  }

  .example-article p {
      margin-bottom: 15px;
      font-size: 1rem;
      line-height: 1.8;
  }

  .example-article pre {
      background: rgba(0,0,0,0.6);
      padding: 15px;
      border-radius: 5px;
      overflow-x: auto;
      margin-bottom: 15px;
  }

  .example-article code {
      color: var(--accent-color);
      font-family: 'Courier New', Courier, monospace;
  }

  /* 代码块样式 */
  pre {
      background: rgba(0,0,0,0.7);
      padding: 15px;
      border-radius: 5px;
      overflow-x: auto;
      font-size: 0.9rem;
      line-height: 1.5;
  }

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

  /* 图像样式 */
  .images-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 10px;
      margin-bottom: 40px;
  }

  .images-grid img {
      width: 100%;
      height: auto;
      border-radius: 10px;
      object-fit: cover;
  }

  /* 提示信息 */
  .reference-note {
      text-align: center;
      font-size: 1rem;
      color: var(--accent-color);
      margin-top: 40px;
      font-weight: bold;
  }

  /* 页脚样式 */
  footer {
      text-align: center;
      padding: 20px;
      background: rgba(0,0,0,0.5);
      border-radius: 10px;
      color: var(--light-color);
      font-size: 1rem;
  }

  /* 断点定义 */
  @media (max-width: 1440px) {
      .hero-content h2 {
          font-size: 2.5rem;
      }

      header {
          padding: 20px;
      }
  }

  @media (max-width: 1200px) {
      .hero-content h2 {
          font-size: 2rem;
      }

      .cta-button {
          padding: 12px 25px;
          font-size: 0.9rem;
      }
  }

  @media (max-width: 1024px) {
      .grid-container {
          grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      }
  }

  @media (max-width: 768px) {
      header {
          flex-direction: column;
          text-align: center;
      }

      nav {
          margin-top: 10px;
      }

      .hero-content h2 {
          font-size: 1.8rem;
      }
  }

  @media (max-width: 480px) {
      .hero-content h2 {
          font-size: 1.5rem;
      }

      .cta-button {
          padding: 10px 20px;
          font-size: 0.8rem;
      }

      .card h3 {
          font-size: 1.2rem;
      }

      .example-article h2 {
          font-size: 1.5rem;
      }

      .example-article h3 {
          font-size: 1.2rem;
      }
  }

  @media (max-width: 320px) {
      .hero-content h2 {
          font-size: 1.2rem;
      }

      .cta-button {
          padding: 8px 16px;
          font-size: 0.7rem;
      }

      .card h3 {
          font-size: 1rem;
      }

      .example-article h2 {
          font-size: 1.2rem;
      }

      .example-article h3 {
          font-size: 1rem;
      }
  }

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