:root {
      --page-55ein-primary-color: #e44d26; /* Màu cam đỏ */
      --page-55ein-secondary-color: #ffb300; /* Màu vàng cam */
      --page-55ein-dark-bg: #1a1a1a;
      --page-55ein-light-bg: #f5f5f5;
      --page-55ein-text-color: #ffffff;
      --page-55ein-dark-text-color: #333333;
      --page-55ein-border-color: #333333;
    }

    body {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-55ein-text-color);
      background-color: var(--page-55ein-dark-bg);
    }

    .page-55ein {
      padding: 10px 0 20px 0; /* Đảm bảo có một khoảng đệm nhỏ phía trên */
      max-width: 1200px;
      margin: 0 auto;
      overflow-x: hidden;
      box-sizing: border-box;
    }

    .page-55ein__hero-section {
      text-align: center;
      padding: 50px 20px;
      background: linear-gradient(135deg, var(--page-55ein-dark-bg), #333333);
      color: var(--page-55ein-text-color);
      margin-bottom: 30px;
      border-radius: 10px;
    }

    .page-55ein__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-55ein-secondary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-55ein__hero-subtitle {
      font-size: 1.2em;
      max-width: 800px;
      margin: 0 auto 30px auto;
      color: #ccc;
    }

    .page-55ein__button {
      display: inline-block;
      background-color: var(--page-55ein-primary-color);
      color: #fff;
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
      margin: 0 10px;
    }

    .page-55ein__button:hover {
      background-color: #d13c1c;
      transform: translateY(-2px);
    }

    .page-55ein__floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      background-color: rgba(0, 0, 0, 0.7);
      padding: 10px 20px;
      border-radius: 30px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-55ein__floating-button {
      background-color: var(--page-55ein-primary-color);
      color: #fff;
      padding: 10px 20px;
      border-radius: 25px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      white-space: nowrap;
      border: none;
      cursor: pointer;
      font-size: 0.9em;
    }

    .page-55ein__floating-button--register {
      background-color: var(--page-55ein-secondary-color);
    }

    .page-55ein__floating-button:hover {
      background-color: #d13c1c;
      transform: translateY(-2px);
    }

    .page-55ein__floating-button--register:hover {
      background-color: #e6a200;
    }

    .page-55ein__section {
      padding: 40px 20px;
      margin-bottom: 30px;
      background-color: #2a2a2a;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .page-55ein__section-title {
      font-size: 2em;
      text-align: center;
      margin-bottom: 40px;
      color: var(--page-55ein-secondary-color);
      position: relative;
    }

    .page-55ein__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background-color: var(--page-55ein-primary-color);
      margin: 10px auto 0 auto;
      border-radius: 2px;
    }

    .page-55ein__product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      justify-items: center;
    }

    .page-55ein__product-card {
      background-color: #333333;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      width: 100%;
      max-width: 350px; /* Giới hạn kích thước thẻ */
      box-sizing: border-box;
    }

    .page-55ein__product-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    }

    .page-55ein__product-image-wrapper {
      width: 100%;
      height: 200px;
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #444;
      box-sizing: border-box;
    }

    .page-55ein__product-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }
    
    .page-55ein__product-card:hover .page-55ein__product-image {
        transform: scale(1.05);
    }

    .page-55ein__product-content {
      padding: 20px;
    }

    .page-55ein__product-title {
      font-size: 1.5em;
      color: var(--page-55ein-secondary-color);
      margin-bottom: 10px;
      height: 2em; /* Đảm bảo chiều cao cố định */
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      display: block; /* Để text-overflow hoạt động */
    }

    .page-55ein__product-description {
      font-size: 0.95em;
      color: #ccc;
      margin-bottom: 20px;
    }

    .page-55ein__promotion-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
    }

    .page-55ein__promotion-item {
      background-color: #333333;
      border-left: 5px solid var(--page-55ein-primary-color);
      padding: 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-55ein__promotion-item:hover {
      transform: translateY(-5px);
    }

    .page-55ein__promotion-title {
      font-size: 1.3em;
      color: var(--page-55ein-secondary-color);
      margin-bottom: 10px;
    }

    .page-55ein__promotion-description {
      color: #ccc;
      font-size: 0.9em;
      margin-bottom: 15px;
    }

    .page-55ein__promotion-link {
        display: inline-block;
        color: var(--page-55ein-primary-color);
        text-decoration: none;
        font-weight: bold;
        transition: color 0.3s ease;
    }

    .page-55ein__promotion-link:hover {
        color: var(--page-55ein-secondary-color);
    }

    .page-55ein__why-choose-us-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      text-align: center;
    }

    .page-55ein__feature-card {
      background-color: #333333;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-55ein__feature-card:hover {
      transform: translateY(-5px);
    }

    .page-55ein__feature-icon-wrapper {
        width: 100px;
        height: 100px;
        margin: 0 auto 20px auto;
        background-color: var(--page-55ein-primary-color);
        border-radius: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        overflow: hidden;
        box-sizing: border-box;
    }

    .page-55ein__feature-icon {
        max-width: 80%;
        max-height: 80%;
        height: auto;
        object-fit: contain;
        box-sizing: border-box;
    }

    .page-55ein__feature-title {
      font-size: 1.4em;
      color: var(--page-55ein-secondary-color);
      margin-bottom: 10px;
    }

    .page-55ein__feature-description {
      color: #ccc;
      font-size: 0.9em;
    }

    .page-55ein__news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .page-55ein__news-article {
      background-color: #333333;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-55ein__news-article:hover {
      transform: translateY(-5px);
    }

    .page-55ein__news-image-wrapper {
      width: 100%;
      height: 180px;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-55ein__news-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      box-sizing: border-box;
    }

    .page-55ein__news-content {
      padding: 20px;
    }

    .page-55ein__news-date {
      font-size: 0.8em;
      color: var(--page-55ein-primary-color);
      margin-bottom: 10px;
      display: block;
    }

    .page-55ein__news-title {
      font-size: 1.2em;
      color: var(--page-55ein-secondary-color);
      margin-bottom: 15px;
      height: 3em; /* Đảm bảo chiều cao cố định */
      overflow: hidden;
      text-overflow: ellipsis;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
    }
    
    .page-55ein__news-read-more {
        display: inline-block;
        color: var(--page-55ein-primary-color);
        text-decoration: none;
        font-weight: bold;
        transition: color 0.3s ease;
    }

    .page-55ein__news-read-more:hover {
        color: var(--page-55ein-secondary-color);
    }

    .page-55ein__faq-section {
      background-color: #2a2a2a;
      padding: 40px 20px;
      margin-bottom: 30px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .page-55ein__faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--page-55ein-border-color);
      border-radius: 8px;
      overflow: hidden;
      background-color: #333333;
    }

    .page-55ein__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #3a3a3a;
      cursor: pointer;
      user-select: none;
      color: var(--page-55ein-secondary-color);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-55ein__faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-55ein__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
      color: inherit;
      font-size: 1em; /* Đảm bảo kích thước phù hợp */
    }

    .page-55ein__faq-toggle {
      font-size: 1.5em;
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Ngăn chặn toggle chặn sự kiện click */
      line-height: 1;
    }

    .page-55ein__faq-item.active .page-55ein__faq-toggle {
      transform: rotate(45deg); /* Biến dấu '+' thành 'x' hoặc '-' nếu muốn */
    }
    
    .page-55ein__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      color: #ccc;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-55ein__faq-item.active .page-55ein__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
      padding: 20px 20px !important;
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-55ein {
        padding: 0 10px 20px 10px;
      }

      .page-55ein__hero-title {
        font-size: 2em;
      }

      .page-55ein__hero-subtitle {
        font-size: 1em;
      }

      .page-55ein__button {
        padding: 10px 20px;
        font-size: 0.9em;
        margin: 0 5px;
      }

      .page-55ein__floating-buttons {
        bottom: 10px;
        padding: 8px 15px;
        gap: 10px;
      }

      .page-55ein__floating-button {
        padding: 8px 15px;
        font-size: 0.8em;
      }

      .page-55ein__section {
        padding: 30px 15px;
      }

      .page-55ein__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
      }

      .page-55ein__product-grid,
      .page-55ein__promotion-list,
      .page-55ein__why-choose-us-grid,
      .page-55ein__news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      
      .page-55ein__product-card,
      .page-55ein__feature-card,
      .page-55ein__news-article,
      .page-55ein__promotion-item {
          width: 100% !important;
          max-width: 100% !important;
          box-sizing: border-box !important;
      }

      .page-55ein__product-image-wrapper {
          height: 180px;
      }

      .page-55ein__faq-question {
        font-size: 1em;
        padding: 12px 15px;
      }

      .page-55ein__faq-answer {
        padding: 0 15px;
        font-size: 0.9em;
      }

      .page-55ein__faq-item.active .page-55ein__faq-answer {
        padding: 15px 15px !important;
      }
      
      /* Ensure images are responsive */
      .page-55ein img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-55ein__product-image-wrapper,
      .page-55ein__news-image-wrapper,
      .page-55ein__feature-icon-wrapper {
          width: 100% !important;
          max-width: 100% !important;
          overflow: hidden !important;
          box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-55ein__hero-title {
        font-size: 1.8em;
      }
      .page-55ein__hero-subtitle {
        font-size: 0.9em;
      }
      .page-55ein__floating-buttons {
        flex-direction: column;
        width: calc(100% - 40px);
        left: 20px;
        transform: none;
        bottom: 10px;
        border-radius: 10px;
        padding: 10px;
      }
      .page-55ein__floating-button {
        width: 100%;
        text-align: center;
        border-radius: 8px;
      }
      .page-55ein__product-image-wrapper {
        height: 150px;
      }
    }