:root {
      --page-123b-primary-color: #e44d26; /* Cam đỏ */
      --page-123b-secondary-color: #333;
      --page-123b-accent-color: #f0ad4e; /* Vàng cam */
      --page-123b-text-color: #333;
      --page-123b-light-bg: #f8f8f8;
      --page-123b-dark-bg: #222;
      --page-123b-white: #fff;
      --page-123b-border-radius: 8px;
    }

    .page-123b {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-123b-text-color);
      background-color: var(--page-123b-light-bg);
      padding: 0;
      margin: 0;
    }

    .page-123b__hero-section {
      position: relative;
      width: 100%;
      height: 60vh; /* Điều chỉnh chiều cao cho banner */
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: var(--page-123b-white);
      overflow: hidden;
      padding-top: 10px; /* Cho desktop */
      box-sizing: border-box;
    }

    .page-123b__hero-section::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.7));
      z-index: 1;
    }

    .page-123b__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
    }

    .page-123b__hero-content {
      position: relative;
      z-index: 2;
      max-width: 90%;
      margin: 0 auto;
      padding: 20px;
      background-color: rgba(0, 0, 0, 0.4);
      border-radius: var(--page-123b-border-radius);
    }

    .page-123b__hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      color: var(--page-123b-white);
    }

    .page-123b__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 20px;
      color: var(--page-123b-white);
    }

    .page-123b__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-white);
      padding: 15px 30px;
      border-radius: 50px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.3s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-123b__floating-button:hover {
      background-color: #c0392b; /* Màu đậm hơn khi hover */
      transform: translateX(-50%) translateY(-5px);
    }

    .page-123b__section {
      padding: 40px 20px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
    }

    .page-123b__section--dark {
      background-color: var(--page-123b-dark-bg);
      color: var(--page-123b-white);
    }

    .page-123b__section-title {
      font-size: 2em;
      margin-bottom: 30px;
      color: var(--page-123b-primary-color);
      position: relative;
      padding-bottom: 10px;
    }

    .page-123b__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background-color: var(--page-123b-accent-color);
    }

    .page-123b__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-123b__card {
      background-color: var(--page-123b-white);
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: left;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
      color: var(--page-123b-text-color);
    }

    .page-123b__card--dark {
      background-color: #333;
      color: var(--page-123b-white);
    }

    .page-123b__card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .page-123b__card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      border-bottom: 1px solid #eee;
    }

    .page-123b__card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .page-123b__card-title {
      font-size: 1.4em;
      margin-top: 0;
      margin-bottom: 10px;
      color: var(--page-123b-primary-color);
    }

    .page-123b__card--dark .page-123b__card-title {
      color: var(--page-123b-accent-color);
    }

    .page-123b__card-description {
      font-size: 0.95em;
      margin-bottom: 15px;
      flex-grow: 1;
    }

    .page-123b__button {
      display: inline-block;
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-white);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-123b__button:hover {
      background-color: #c0392b;
    }

    .page-123b__text-content {
      text-align: left;
      margin-top: 20px;
      font-size: 1.05em;
    }

    .page-123b__text-content p {
      margin-bottom: 15px;
    }

    .page-123b__text-content ul {
      list-style: disc;
      padding-left: 25px;
      margin-bottom: 15px;
      text-align: left;
    }

    .page-123b__text-content ol {
      list-style: decimal;
      padding-left: 25px;
      margin-bottom: 15px;
      text-align: left;
    }

    .page-123b__text-content li {
      margin-bottom: 8px;
    }

    /* FAQ Section */
    .page-123b__faq-section {
      background-color: var(--page-123b-white);
    }

    .page-123b__faq-list {
      margin-top: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-123b__faq-item {
      background-color: #f0f0f0;
      border-radius: var(--page-123b-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
      transition: background-color 0.3s ease;
    }

    .page-123b__faq-item:hover {
      background-color: #e5e5e5;
    }

    .page-123b__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      user-select: none;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-123b-secondary-color);
    }

    .page-123b__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--page-123b-secondary-color);
      pointer-events: none; /* Prevent h3 from blocking click on parent div */
    }

    .page-123b__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 10px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent div */
    }

    .page-123b__faq-item.active .page-123b__faq-toggle {
      transform: rotate(45deg); /* Change + to X (or similar) */
    }

    .page-123b__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: var(--page-123b-text-color);
    }

    .page-123b__faq-item.active .page-123b__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px !important;
      opacity: 1;
    }

    .page-123b__faq-answer p {
      margin-top: 0;
      margin-bottom: 15px;
    }
    .page-123b__faq-answer ul {
        list-style: disc;
        padding-left: 20px;
    }
    .page-123b__faq-answer li {
        margin-bottom: 5px;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-123b__hero-section {
        height: 50vh;
        padding-top: 10px !important; /* Mobile padding-top for fixed header */
      }

      .page-123b__hero-title {
        font-size: 1.8em;
      }

      .page-123b__hero-subtitle {
        font-size: 1em;
      }

      .page-123b__floating-button {
        padding: 12px 25px;
        font-size: 1em;
        width: calc(100% - 40px);
        bottom: 15px;
      }

      .page-123b__section {
        padding: 30px 15px;
      }

      .page-123b__section-title {
        font-size: 1.8em;
      }

      .page-123b__card-title {
        font-size: 1.2em;
      }

      .page-123b__card-content {
        padding: 15px;
      }

      .page-123b__faq-question {
        padding: 12px 15px;
        font-size: 1em;
      }

      .page-123b__faq-question h3 {
        font-size: 1em;
      }

      .page-123b__faq-answer {
        padding: 0 15px;
      }
      .page-123b__faq-item.active .page-123b__faq-answer {
        padding: 15px !important;
      }

      /* Ensure images are responsive on mobile */
      .page-123b img {
        max-width: 100% !important;
        height: auto !important;
        display: block;
      }
      .page-123b__card-image {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-123b__grid {
        grid-template-columns: 1fr;
      }
    }