/* 基础重置 */
  * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  }

  body {
      color: #333;
      background-color: #fff;
      line-height: 1.6;
  }

  a {
      text-decoration: none;
      color: inherit;
  }

  /* 顶部导航栏 */
  .navbar {
      width: 100%;
      padding: 15px 0px;
      background-color: #fff;
      border-bottom: 1px solid #f0f0f0;
      position: sticky;
      top: 0;
      z-index: 100;
  }

  .navbar_content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
  }

  .nav-logo {
      font-size: 24px;
      font-weight: bold;
      letter-spacing: 2px;
  }

  .nav-links {
      display: flex;
      gap: 25px;
      font-size: 15px;
  }

  .nav-actions {
      display: flex;
      align-items: center;
      gap: 20px;
  }

  .buy-btn {
      background-color: #0070d5;
      color: white;
      padding: 8px 20px;
      border-radius: 20px;
      font-size: 15px;
      border: none;
      cursor: pointer;
  }

  /* 首屏横幅 (Hero Section) */
  .hero {
      background-color: #222;
      background-image: url('../images/banner.png');
      background-size: cover;
      background-position: center;
      height: 400px;
      display: flex;
      align-items: center;
      padding-left: 10%;
      color: white;
  }

  .hero h1 {
      font-size: 36px;
      font-weight: 500;
      margin-bottom: 10px;
  }

  .hero p {
      font-size: 16px;
      color: #ccc;
  }

  /* 页面主体容器 */
  .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
  }

  /* 产品卡片 */
  .product-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 60px 0;
      border-bottom: 1px solid #f0f0f0;
  }

  .product-info {
      flex: 1;
      padding-right: 60px;
  }

  .product-title {
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 15px;
      text-transform: uppercase;
  }

  .product-desc {
      font-size: 16px;
      color: #666;
      margin-bottom: 20px;
  }

  .learn-more {
      font-size: 16px;
      color: #333;
      font-weight: 500;
  }

  .learn-more:hover {
      color: #0070d5;
  }

  .product-image {
      flex: 1;
      text-align: right;
  }

  .product-image img {
      max-width: 100%;
      height: auto;
  }

  /* 竞赛与解决方案 */
  .competitions-section {
      padding: 50px 0;
      background-color: #fafafa;

  }

  .competitions-section .container {
      padding: 0px 0px;
  }

  .section-title {
      text-align: center;
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 50px;
  }

  .comp-card {
      display: flex;
      background: #fff;
      margin-bottom: 30px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  }

  .comp-info {
      flex: 1;
      padding: 50px;
      display: flex;
      flex-direction: column;
      justify-content: center;
  }

  .comp-image {
      flex: 1;
  }

  .comp-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
  }



  /* 页脚 Footer */
  .footer {
      background-color: #111;
      color: #888;
      padding: 60px 40px 20px;
      font-size: 14px;
  }

  .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 60px;
      max-width: 1240px;
      margin: 0px auto;
      padding: 0 20px;
      padding-bottom: 30px;
  }

  .footer-col h4 {
      color: #ddd;
      margin-bottom: 15px;
      font-weight: 500;
  }

  .footer-col ul {
      list-style: none;
  }

  .footer-col ul li {
      margin-bottom: 10px;
  }

  .footer-col ul li a:hover {
      color: #fff;
  }

  .newsletter input {
      background: #222;
      border: 1px solid #444;
      color: white;
      padding: 8px 12px;
      width: 100%;
      margin-top: 10px;
      border-radius: 4px;
      font-size: 14px;
  }
  
  .newsletter input:focus {
      outline: none;
      border-color: #007bff;
      box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
  }
  
  .newsletter button {
      background: #007bff;
      color: white;
      border: none;
      padding: 10px 16px;
      margin-top: 10px;
      cursor: pointer;
      width: 100%;
      border-radius: 4px;
      font-size: 14px;
      font-weight: 500;
      transition: background-color 0.2s ease;
  }
  
  .newsletter button:hover {
      background: #0056b3;
  }
  
  .newsletter button:disabled {
      background: #6c757d;
      cursor: not-allowed;
      opacity: 0.7;
  }
  
  .newsletter button:focus {
      outline: none;
      box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.5);
  }
  
  .newsletter-message {
      margin-top: 10px;
      padding: 10px 12px;
      border-radius: 4px;
      font-size: 13px;
      line-height: 1.4;
      display: none;
  }
  
  .newsletter-message.success {
      background: #d4edda;
      color: #155724;
      border: 1px solid #c3e6cb;
      display: block;
  }
  
  .newsletter-message.error {
      background: #f8d7da;
      color: #721c24;
      border: 1px solid #f5c6cb;
      display: block;
  }

  /* ============================================
     Newsletter Popup Styles
     ============================================ */
  
  .newsletter-popup {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 9999;
  }
  
  .newsletter-popup.active {
      display: block;
      animation: fadeIn 0.3s ease;
  }
  
  @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
  }
  
  /* Overlay */
  .newsletter-popup-overlay {
      position: absolute;
      inset: 0;
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(4px);
  }
  
  /* Content */
  .newsletter-popup-content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 90%;
      max-width: 500px;
      background: white;
      border-radius: 12px;
      padding: 30px;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      animation: slideUp 0.4s ease;
  }
  
  @keyframes slideUp {
      from {
          opacity: 0;
          transform: translate(-50%, -40%);
      }
      to {
          opacity: 1;
          transform: translate(-50%, -50%);
      }
  }
  
  /* Close button */
  .newsletter-popup-close {
      position: absolute;
      top: 15px;
      right: 15px;
      width: 36px;
      height: 36px;
      border: none;
      background: #f5f5f5;
      border-radius: 50%;
      font-size: 24px;
      line-height: 1;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
  }
  
  .newsletter-popup-close:hover {
      background: #e0e0e0;
      transform: scale(1.1);
  }
  
  /* Title and text */
  .newsletter-popup-content h3 {
      font-size: 24px;
      margin-bottom: 10px;
      color: #333;
      text-align: center;
  }
  
  .newsletter-popup-content p {
      color: #666;
      line-height: 1.6;
      margin-bottom: 25px;
      text-align: center;
  }
  
  /* Form */
  .newsletter-popup-form {
      margin-bottom: 20px;
  }
  
  .newsletter-popup-form input[type="email"] {
      width: 100%;
      padding: 14px 16px;
      border: 2px solid #e0e0e0;
      border-radius: 8px;
      font-size: 16px;
      margin-bottom: 15px;
      transition: border-color 0.2s ease;
  }
  
  .newsletter-popup-form input[type="email"]:focus {
      outline: none;
      border-color: #007bff;
      box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
  }
  
  .newsletter-popup-form button[type="submit"] {
      width: 100%;
      padding: 14px 16px;
      background: #007bff;
      color: white;
      border: none;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.2s ease;
  }
  
  .newsletter-popup-form button[type="submit"]:hover {
      background: #0056b3;
  }
  
  .newsletter-popup-form button[type="submit"]:disabled {
      background: #6c757d;
      cursor: not-allowed;
      opacity: 0.7;
  }
  
  /* Popup message */
  .newsletter-popup-message {
      margin: 15px 0;
      padding: 12px 16px;
      border-radius: 6px;
      font-size: 14px;
      line-height: 1.5;
      display: none;
  }
  
  .newsletter-popup-message.success {
      background: #d4edda;
      color: #155724;
      border: 1px solid #c3e6cb;
      display: block;
  }
  
  .newsletter-popup-message.error {
      background: #f8d7da;
      color: #721c24;
      border: 1px solid #f5c6cb;
      display: block;
  }
  
  /* Note text */
  .newsletter-popup-note {
      font-size: 12px;
      color: #999;
      text-align: center;
      margin-top: 15px;
      line-height: 1.5;
  }
  
  /* Responsive adjustments */
  @media (max-width: 768px) {
      .newsletter-popup-content {
          width: 95%;
          padding: 25px 20px;
      }
      
      .newsletter-popup-content h3 {
          font-size: 20px;
      }
      
      .newsletter-popup-content p {
          font-size: 14px;
      }
      
      .newsletter-popup-form input[type="email"],
      .newsletter-popup-form button[type="submit"] {
          padding: 12px 14px;
          font-size: 15px;
      }
  }
  
  @media (max-width: 480px) {
      .newsletter-popup-content {
          padding: 20px 15px;
      }
      
      .newsletter-popup-close {
          top: 10px;
          right: 10px;
          width: 32px;
          height: 32px;
          font-size: 20px;
      }
  }

  .footer-bottom {
      border-top: 1px solid #333;
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1240px;
      margin: 0px auto;
      padding: 0 20px;
      text-align: center;
      padding-top: 20px;
  }

  .footer-bottom-links a {
      margin-right: 15px;
  }


  /* ================= Tello Hero ================= */
  .tello-hero {
      background: linear-gradient(to right, #8cd4e6, #b2e2f0);
      background-image: url('../images/banner2.jpg');
      background-size: cover;
      background-position: center;
      height: 400px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: #333;
  }

  .tello-hero h1 {
      font-size: 42px;
      margin-bottom: 10px;
      color: #e67e22;
  }

  /* ================= Intro Section (1200px) ================= */
  .intro-section {
      max-width: 1240px;
      margin: 60px auto;
      padding: 0 20px;
      text-align: center;
  }

  .video-box {
      width: 100%;
      /* aspect-ratio: 16 / 9; */
      height: 550px;
      /* background: #8c6a46; */
      margin-bottom: 40px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      /* background-image: url('../images/video.jpg'); */
      background-size: cover;
      background-position: center;
  }

  .video-box .play {
      width: 50px;
      height: 50px;
      text-align: center;
      border: 2px solid #e67e22;
      border-radius: 50%;
      padding: 10px;
      background: #e67e22;
      color: #ffffff;
      position: relative;
  }
  .video-box video{
    min-width: 900px;
            max-width: 1200px;
  }



  .intro-section .desc {
      font-size: 16px;
      margin: 30px auto;
      text-align: center;
      max-width: 800px;
  }

  .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      margin-top: 50px;
  }

  .feature-list {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
      justify-content: center;
  }

  .feature-item {
      width: 22%;
      text-align: center;
  }

  .feature-icon {
      width: 60px;
      height: 60px;
      margin-bottom: 10px;
  }

  .feature-title {
      font-size: 16px;
      color: #333;
  }

  .feature-item img {
      width: 50px;
      margin-bottom: 10px;
  }

  /* ================= 改后的交错图文卡片 (关键修改) ================= */
  .content-container {
      width: 100%;
      background: #eaecee;
      padding: 64px 0;
      padding-bottom: 32px;
  }

  .card-row {
      max-width: 1200px;
      margin: 0 auto;

      display: flex;
      background-color: #fff;
      /* 卡片背景白色 */
      margin-bottom: 40px;
      /* 卡片间的间距 */
      /* border-radius: 12px; */
      overflow: hidden;
      /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); */
      /* 增加轻微投影 */
      min-height: 450px;
  }

  .card-row.reverse {
      flex-direction: row-reverse;
  }

  .card-text {
      flex: 1;
      padding: 60px;
      display: flex;
      flex-direction: column;
      justify-content: center;
  }

  .card-text h3 {
      font-size: 28px;
      margin-bottom: 20px;
      color: #000;
  }

  .card-text p {
      font-size: 15px;
      color: #666;
      margin-bottom: 25px;
      line-height: 1.8;
  }

  .card-text .more-link {
      color: #0070d5;
      font-weight: 500;
  }

  .card-image {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
  }

  .card-image img {
      width: 100%;
      height: auto;
      object-fit: cover;
  }

  /* 针对不同背景颜色的特殊处理 */
  .bg-yellow {
      background-color: #ffd950;
  }

  .bg-blue {
      background-color: #bee2f4;
  }

  .bg-purple {
      background-color: #bdb4e6;
  }

  .bg-cyan {
      background-color: #00bced;
  }

  /* AI功能的蓝色背景 */
  /* news */
    .hero-news{
      background-color: #222;
      background-image: url('../images/banner-video.jpg');
      background-size: cover;
      background-position: center;
      height: 160px;
      display: flex;
      align-items: center;
      color: white;
  }

  .hero-news h1 {
      font-size: 36px;
      font-weight: 500;
      margin-bottom: 10px;
  }
  .news-section{
   
  max-width: 1240px;
  margin: 20px auto;
  padding: 0 20px;
  }
  .news-h2-title{
   
    text-align: left;
    font-size: 26px;
    font-weight: bold;
    padding: 20px 0px;
    border-bottom: 1px solid #f0f0f0;
  }
  /* 容器 */

  .news-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      /* 一行3个 */
      gap: 30px;
      max-width: 1240px;
      margin: 10px auto;
      padding: 20px 0px;
  }

  /* 单个卡片 */
  .news-item {
      /* border-radius: 12px; */
      overflow: hidden;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  /* 链接 */
  .news-link {
      display: block;
      text-decoration: none;
      color: inherit;
  }

  /* 图片 */
  .news-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
  }

  /* 标题 */
  .news-title {
      font-size: 16px;
      font-weight: 600;
      margin: 12px 10px 6px;
      color: #222;
  }

  /* 日期 */
  .news-item .news-date {
      font-size: 13px;
      color: #888;
      margin: 0 10px 12px;
  }

  /* hover效果 */
  .news-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

  /* 外层 */
.news-detail {
  padding: 40px 0px;
}

/* 布局 */
.news-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

/* 主内容 */


/* 文章 */
.news-article {
  line-height: 1.8;
  color: #444;
}

/* 日期 */
.news-article .news-date {
  color: #888;
  font-size: 14px;
  margin-bottom: 15px;
}

/* 内容 */
.news-content p {
  margin-bottom: 16px;
  font-size: 15px;
}

/* 标题 */
.news-content h3 {
  margin: 30px 0 10px;
  font-size: 20px;
  color: #222;
}

/* 图片 */
.news-image {
  width: 100%;
  border-radius: 10px;
  margin: 20px 0;
}

/* 右侧栏 */
.news-sidebar {
  border-left: 1px solid #eee;
  padding-left: 20px;
}

/* 标题 */
.sidebar-title {
  font-size: 18px;
  margin-bottom: 20px;
}

/* 列表 */
.sidebar-item {
  display: block;
  text-decoration: none;
  margin-bottom: 15px;
}

/* 标题 */
.sidebar-item-title {
  font-size: 14px;
  color: #333;
}

/* 日期 */
.sidebar-item-date {
  font-size: 12px;
  color: #999;
}

    .hero-company{
      background-color: #222;
      background-image: url('../images/banner-video.jpg');
      background-size: cover;
      background-position: center;
      height: 160px;
      display: flex;
      align-items: center;
      color: white;
  }

  .hero-company h1 {
      font-size: 36px;
      font-weight: 500;
      margin-bottom: 10px;
  }
  /* 整体区域 */
  .company-section {
      max-width: 1240px;
      margin: 60px auto;
      padding: 0 20px;
  }

  /* 标题 */
  .company-title {
      font-size: 28px;
      font-weight: bold;
      margin-bottom: 20px;
      color: #222;
  }

  /* 描述 */
  .company-desc {
      font-size: 15px;
      line-height: 1.8;
      color: #555;
      margin-bottom: 40px;
  }

  /* 联系区域 */
  .company-contact {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
  }

  /* 卡片 */
  .contact-card {
      flex: 1;
      min-width: 260px;
      display: flex;
      align-items: center;
      gap: 15px;
      padding: 20px;
      border-radius: 12px;
      background: #f8f9fb;
      transition: all 0.3s ease;
  }

  /* hover效果 */
  .contact-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  }

  /* 图标 */
  .contact-icon {
      width: 50px;
      height: auto;
  }

  /* 内容 */
  .contact-info {
      flex: 1;
  }

  .contact-title {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 5px;
      color: #333;
  }

  .contact-text {
      font-size: 14px;
      color: #666;
      margin: 2px 0;
  }

   .hero-product{
      background-color: #222;
      background-image: url('../images/banner-video.jpg');
      background-size: cover;
      background-position: center;
      height: 160px;
      display: flex;
      align-items: center;
      color: white;
  }

  .hero-product h1 {
      font-size: 36px;
      font-weight: 500;
      margin-bottom: 10px;
  }

  /* 区域 */
   .hero-video {
      background-color: #222;
      background-image: url('../images/banner-video.jpg');
      background-size: cover;
      background-position: center;
      height: 160px;
      display: flex;
      align-items: center;
      color: white;
  }

  .hero-video h1 {
      font-size: 36px;
      font-weight: 500;
      margin-bottom: 10px;
  }

.video-section {
  max-width: 1240px;
  margin: 20px auto;
  padding: 0 20px;
}

/* 标题 */
.video-section-title {
  
    text-align: left;
    font-size: 26px;
  font-weight: bold;
    padding: 20px 0px;
    border-bottom: 1px solid #f0f0f0;
}

/* 列表 */
.video-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
  margin-top: 20px;
}

/* 卡片 */
.video-card {
  cursor: pointer;
}

/* 缩略图 */
.video-thumbnail {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
}

.video-thumbnail img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* 播放按钮 */
.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 20px;
  color: white;
  background: rgba(0,0,0,0.5);
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border-radius: 50%;
}

/* 标题 */
.video-title {
  margin-top: 10px;
  font-size: 15px;
}

/* 弹窗 */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
}

.video-modal.active {
  display: block;
}

/* 遮罩 */
.video-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
}

/* 内容 */
.video-modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80%;
  max-width: 800px;
  transform: translate(-50%, -50%);
}

/* iframe */
.video-modal iframe {
  width: 100%;
  height: 450px;
  border: none;
}

/* 关闭 */
.video-close {
  position: absolute;
  top: -40px;
  right: 0;
  font-size: 30px;
  color: white;
  cursor: pointer;
}

.public_section{
  width: 1200px;
  max-width: 1200px;
  margin: 0 auto;
}

  /* 响应式 */
  @media (max-width: 900px) {
      .news-list {
          grid-template-columns: repeat(2, 1fr);
      }
      .video-list {
    grid-template-columns: repeat(2, 1fr);
  }

.news-container{
grid-template-columns: auto;
}
  }

  /* 响应式调整 */
  @media (max-width: 768px) {
    .public_section{
        padding-left: 20px;
    }

.news-container{
grid-template-columns: auto;
}
     .video-list {
    grid-template-columns: 1fr;
  }
      .competitions-section {
          padding: 40px 0;
      }

      .product-card,
      .comp-card {
          flex-direction: column;
      }

      .product-info,
      .comp-info {
          padding-right: 0;
          padding-bottom: 30px;
          padding: 30px;
      }

      .footer-grid {
          grid-template-columns: repeat(2, 1fr);
      }

      .nav-links {
          display: none;
          /* 移动端简化导航 */
      }

      .footer {
          padding: 30px 20px 20px;
      }

      .card-row,
      .card-row.reverse {
          flex-direction: column;
      }

      .feature-grid {
          grid-template-columns: repeat(2, 1fr);
      }

      .company-contact {
          flex-direction: column;
      }

      .news-list {
          grid-template-columns: 1fr;
      }

  }