/* CSS cho trang 66fff */
    .page-66fff {
      font-family: 'Arial', sans-serif;
      color: #333;
      line-height: 1.6;
      background-color: #f4f7f6;
      padding-bottom: 100px; /* Đảm bảo có đủ không gian cho các nút nổi */
    }

    /* Đảm bảo nội dung không bị che bởi header */
    .page-66fff__hero-section {
      padding-top: 10px; /* Small decorative padding, assuming body has main padding-top */
      position: relative;
      background-color: #0d1a26; /* Màu nền tối */
      color: #fff;
      text-align: center;
      padding-bottom: 40px;
    }

    .page-66fff__hero-content {
      max-width: 90%;
      margin: 0 auto;
      padding: 20px 0;
    }

    .page-66fff__hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      color: #ffda44; /* Màu vàng nổi bật */
      text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
      word-wrap: break-word; /* Ensure long titles wrap */
      overflow-wrap: break-word;
    }

    .page-66fff__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 20px;
      color: #c0c0c0;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__hero-image {
      width: 100%;
      max-width: 800px;
      height: auto;
      border-radius: 15px;
      margin-top: 20px;
      box-shadow: 0 8px 16px rgba(0,0,0,0.4);
      object-fit: cover;
    }
    .page-66fff__hero-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .page-66fff__buttons-container {
      display: flex;
      justify-content: center;
      gap: 15px;
      margin-top: 30px;
    }

    .page-66fff__button {
      background-color: #e74c3c; /* Màu đỏ cam */
      color: #fff;
      padding: 12px 25px;
      border-radius: 30px;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
      box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    }

    .page-66fff__button:hover {
      background-color: #c0392b;
      transform: translateY(-2px);
    }

    /* Các nút đăng ký/đăng nhập nổi */
    .page-66fff__floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      width: 90%;
      max-width: 400px; /* Giới hạn chiều rộng trên desktop */
      box-sizing: border-box;
    }

    .page-66fff__floating-button {
      flex: 1;
      background-color: #27ae60; /* Màu xanh lá cây */
      color: #fff;
      padding: 15px 10px;
      border-radius: 30px;
      font-weight: bold;
      text-align: center;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1.1em;
      box-shadow: 0 6px 12px rgba(0,0,0,0.3);
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__floating-button--login {
      background-color: #3498db; /* Màu xanh dương */
    }

    .page-66fff__floating-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 16px rgba(0,0,0,0.4);
    }
    .page-66fff__floating-button--login:hover {
      background-color: #2980b9;
    }

    .page-66fff__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      background-color: #ffffff;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      margin-bottom: 30px;
    }

    .page-66fff__section-title {
      font-size: 2em;
      color: #2c3e50; /* Màu xanh đậm */
      text-align: center;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: 0;
      width: 80px;
      height: 4px;
      background-color: #e74c3c;
      border-radius: 2px;
    }

    .page-66fff__text-content {
      font-size: 1.1em;
      color: #555;
      text-align: justify;
      margin-bottom: 20px;
    }

    .page-66fff__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-66fff__feature-item {
      background-color: #ecf0f1;
      padding: 25px;
      border-radius: 10px;
      text-align: center;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box; /* IMPORTANT for responsive lists */
    }

    .page-66fff__feature-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0,0,0,0.15);
    }

    .page-66fff__feature-icon-container {
      margin-bottom: 15px;
      display: flex;
      justify-content: center;
    }

    .page-66fff__feature-icon {
      width: 100%;
      max-width: 250px; /* Minimum 200px, but for features, slightly larger is good */
      height: auto;
      object-fit: cover;
      border-radius: 8px;
    }

    .page-66fff__feature-title {
      font-size: 1.3em;
      color: #2c3e50;
      margin-bottom: 10px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__feature-description {
      font-size: 0.95em;
      color: #777;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__products-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-66fff__product-card {
      background-color: #fff;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box; /* IMPORTANT for responsive lists */
      text-align: center;
    }

    .page-66fff__product-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }

    .page-66fff__product-image-container {
      width: 100%;
      height: 200px;
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .page-66fff__product-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .page-66fff__product-card:hover .page-66fff__product-image {
      transform: scale(1.05);
    }

    .page-66fff__product-info {
      padding: 20px;
    }

    .page-66fff__product-title {
      font-size: 1.4em;
      color: #2c3e50;
      margin-bottom: 10px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__product-description {
      font-size: 0.95em;
      color: #666;
      margin-bottom: 15px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__promotion-item {
      display: flex;
      align-items: center;
      margin-bottom: 25px;
      background-color: #f9f9f9;
      border-radius: 10px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      padding: 20px;
      transition: transform 0.3s ease;
      box-sizing: border-box; /* IMPORTANT for responsive lists */
    }

    .page-66fff__promotion-item:hover {
      transform: translateY(-3px);
    }

    .page-66fff__promotion-image-container {
      flex-shrink: 0;
      width: 120px;
      height: 120px;
      margin-right: 20px;
      border-radius: 8px;
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .page-66fff__promotion-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .page-66fff__promotion-content {
      flex-grow: 1;
    }

    .page-66fff__promotion-title {
      font-size: 1.3em;
      color: #e74c3c;
      margin-bottom: 8px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__promotion-description {
      font-size: 1em;
      color: #555;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__faq-section {
      background-color: #ecf0f1;
    }

    .page-66fff__faq-item {
      background-color: #fff;
      margin-bottom: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.08);
      overflow: hidden;
    }

    .page-66fff__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #f0f0f0;
      cursor: pointer;
      user-select: none;
      border-bottom: 1px solid #ddd;
      transition: background-color 0.3s ease;
    }

    .page-66fff__faq-question:hover {
      background-color: #e0e0e0;
    }

    .page-66fff__faq-question-text {
      font-size: 1.1em;
      color: #2c3e50;
      flex-grow: 1;
      margin-right: 10px;
      pointer-events: none; /* Prevent text from blocking click event */
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-66fff__faq-toggle {
      font-size: 1.5em;
      color: #e74c3c;
      font-weight: bold;
      pointer-events: none; /* Prevent icon from blocking click event */
      width: 20px;
      text-align: center;
    }

    .page-66fff__faq-item.active .page-66fff__faq-toggle {
      content: '−'; /* Changed via JS */
    }

    .page-66fff__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      background-color: #ffffff;
      color: #555;
    }

    .page-66fff__faq-item.active .page-66fff__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 15px !important;
      opacity: 1;
    }
    .page-66fff__faq-answer p {
      margin-bottom: 10px;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }
    .page-66fff__faq-answer p:last-child {
      margin-bottom: 0;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-66fff__hero-title {
        font-size: 2em;
      }

      .page-66fff__hero-subtitle {
        font-size: 1em;
      }

      .page-66fff__button {
        padding: 10px 20px;
        font-size: 0.9em;
      }

      .page-66fff__floating-buttons {
        width: 95%;
        gap: 10px;
      }

      .page-66fff__floating-button {
        padding: 12px 8px;
        font-size: 1em;
      }

      .page-66fff__section {
        padding: 30px 15px;
      }

      .page-66fff__section-title {
        font-size: 1.8em;
      }

      .page-66fff__text-content {
        font-size: 1em;
      }

      .page-66fff__features-grid,
      .page-66fff__products-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
      }
      
      /* List item responsiveness for .page-66fff__feature-item */
      .page-66fff__feature-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important;
      }
      /* List container responsiveness for grids */
      .page-66fff__features-grid,
      .page-66fff__products-grid {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 10px !important; /* Adjust padding for grid container */
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      /* List item responsiveness for .page-66fff__product-card */
      .page-66fff__product-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-66fff__promotion-item {
        flex-direction: column;
        text-align: center;
        padding: 15px;
      }

      .page-66fff__promotion-image-container {
        margin-right: 0;
        margin-bottom: 15px;
        width: 100px;
        height: 100px;
      }

      .page-66fff__promotion-title {
        font-size: 1.2em;
      }

      .page-66fff__promotion-description {
        font-size: 0.9em;
      }

      .page-66fff__faq-question {
        padding: 12px 15px;
      }

      .page-66fff__faq-question-text {
        font-size: 1em;
      }

      .page-66fff__faq-toggle {
        font-size: 1.3em;
      }

      .page-66fff__faq-answer {
        padding: 15px 15px !important; /* Adjusted for mobile */
      }
    }

    @media (max-width: 480px) {
      .page-66fff__hero-title {
        font-size: 1.8em;
      }
      .page-66fff__hero-subtitle {
        font-size: 0.9em;
      }
      .page-66fff__floating-button {
        font-size: 0.9em;
        padding: 10px 5px;
      }
    }