:root {
      --page-123b__primary-color: #ffcc00; /* Vàng sáng */
      --page-123b__secondary-color: #333333; /* Xám đậm */
      --page-123b__accent-color: #e60000; /* Đỏ */
      --page-123b__text-color: #ffffff; /* Trắng */
      --page-123b__dark-text-color: #1a1a1a; /* Gần đen */
      --page-123b__background-dark: #1a1a1a;
      --page-123b__background-light: #2c2c2c;
      --page-123b__border-color: #444444;
    }

    .page-123b {
      font-family: 'Arial', sans-serif;
      color: var(--page-123b__text-color);
      line-height: 1.6;
      background-color: var(--page-123b__background-dark);
      padding-bottom: 80px; /* Để chừa chỗ cho nút nổi */
    }

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

    .page-123b__section--dark {
      background-color: var(--page-123b__background-light);
    }

    .page-123b__hero-section {
      position: relative;
      background: var(--page-123b__background-dark);
      color: var(--page-123b__text-color);
      padding-top: 10px; /* Nhẹ nhàng hơn, body đã có padding-top */
      padding-bottom: 60px;
      overflow: hidden;
    }

    .page-123b__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
      z-index: 0;
    }

    .page-123b__hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px;
      text-align: center;
    }

    .page-123b__hero-title {
      font-size: 3em;
      margin-bottom: 10px;
      color: var(--page-123b__primary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-123b__hero-subtitle {
      font-size: 1.5em;
      margin-bottom: 30px;
      color: var(--page-123b__text-color);
    }

    .page-123b__cta-button {
      display: inline-block;
      background-color: var(--page-123b__accent-color);
      color: var(--page-123b__text-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      margin: 10px;
      box-sizing: border-box;
    }

    .page-123b__cta-button:hover {
      background-color: #ff3333;
      transform: translateY(-3px);
    }

    .page-123b__brand-logo {
      font-size: 4em;
      font-weight: bold;
      color: var(--page-123b__primary-color);
      text-align: center;
      margin-bottom: 20px;
      text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.8);
    }

    .page-123b__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: 50px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    }

    .page-123b__floating-button {
      background-color: var(--page-123b__primary-color);
      color: var(--page-123b__dark-text-color);
      padding: 12px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      box-sizing: border-box;
    }

    .page-123b__floating-button--register {
      background-color: var(--page-123b__accent-color);
      color: var(--page-123b__text-color);
    }

    .page-123b__floating-button--register:hover {
      background-color: #ff3333;
      transform: scale(1.05);
    }

    .page-123b__floating-button:hover {
      background-color: #ffeb3b;
      transform: scale(1.05);
    }

    .page-123b__section-title {
      font-size: 2.5em;
      color: var(--page-123b__primary-color);
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    .page-123b__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: 0;
      width: 80px;
      height: 4px;
      background-color: var(--page-123b__accent-color);
      border-radius: 2px;
    }

    .page-123b__product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
      justify-content: center;
    }

    .page-123b__product-card {
      background-color: var(--page-123b__background-light);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      padding-bottom: 20px;
      border: 1px solid var(--page-123b__border-color);
      box-sizing: border-box;
    }

    .page-123b__product-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }

    .page-123b__product-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      border-bottom: 1px solid var(--page-123b__border-color);
    }

    .page-123b__product-title {
      font-size: 1.5em;
      color: var(--page-123b__primary-color);
      margin: 20px 15px 10px;
    }

    .page-123b__product-description {
      font-size: 0.95em;
      color: #cccccc;
      padding: 0 15px;
      margin-bottom: 20px;
    }

    .page-123b__features-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      list-style: none;
      padding: 0;
      margin-top: 30px;
    }

    .page-123b__feature-item {
      background-color: var(--page-123b__background-light);
      border-radius: 10px;
      padding: 25px;
      text-align: left;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      border-left: 5px solid var(--page-123b__primary-color);
      transition: background-color 0.3s ease, transform 0.3s ease;
      box-sizing: border-box;
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .page-123b__feature-item:hover {
      background-color: #3a3a3a;
      transform: translateY(-5px);
    }

    .page-123b__feature-icon {
      width: 60px;
      height: 60px;
      object-fit: contain;
      flex-shrink: 0;
    }

    .page-123b__feature-content h3 {
      color: var(--page-123b__primary-color);
      margin-top: 0;
      margin-bottom: 10px;
      font-size: 1.3em;
    }

    .page-123b__feature-content p {
      color: #ccc;
      font-size: 0.9em;
    }

    .page-123b__providers-grid,
    .page-123b__payments-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
      justify-items: center;
      align-items: center;
    }

    .page-123b__provider-item,
    .page-123b__payment-item {
      background-color: var(--page-123b__background-light);
      border-radius: 8px;
      padding: 15px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.2s ease;
      box-sizing: border-box;
      width: 100%;
      max-width: 200px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 120px;
    }

    .page-123b__provider-item:hover,
    .page-123b__payment-item:hover {
      transform: translateY(-5px);
    }

    .page-123b__provider-logo,
    .page-123b__payment-logo {
      max-width: 100px;
      height: auto;
      object-fit: contain;
      margin-bottom: 10px;
    }

    .page-123b__provider-name,
    .page-123b__payment-name {
      color: var(--page-123b__text-color);
      font-weight: bold;
      font-size: 0.9em;
      text-align: center;
      word-wrap: break-word;
    }

    .page-123b__faq-list {
      list-style: none;
      padding: 0;
      margin-top: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-123b__faq-item {
      background-color: var(--page-123b__background-light);
      border-radius: 10px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-123b__border-color);
      box-sizing: border-box;
    }

    .page-123b__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      background-color: #3a3a3a;
      color: var(--page-123b__primary-color);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-123b__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--page-123b__primary-color);
      pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
      flex-grow: 1;
      text-align: left;
    }

    .page-123b__faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-123b__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      color: var(--page-123b__accent-color);
      pointer-events: none; /* Ngăn chặn toggle icon chặn sự kiện click */
      transition: transform 0.3s ease;
    }

    .page-123b__faq-item.active .page-123b__faq-toggle {
      transform: rotate(45deg); /* Biến '+' thành 'x' hoặc '-' */
    }

    .page-123b__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      background-color: var(--page-123b__background-light);
      color: #cccccc;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      text-align: left;
      box-sizing: border-box;
    }

    .page-123b__faq-item.active .page-123b__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-123b__social-links {
      margin-top: 40px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }

    .page-123b__social-link {
      display: inline-flex;
      align-items: center;
      background-color: var(--page-123b__background-light);
      color: var(--page-123b__text-color);
      padding: 10px 20px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: 1px solid var(--page-123b__border-color);
      box-sizing: border-box;
    }

    .page-123b__social-link:hover {
      background-color: #4a4a4a;
      transform: translateY(-3px);
    }

    .page-123b__social-icon {
      width: 24px;
      height: 24px;
      margin-right: 8px;
      object-fit: contain;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-123b__hero-title {
        font-size: 2.2em;
      }

      .page-123b__hero-subtitle {
        font-size: 1.2em;
      }

      .page-123b__section-title {
        font-size: 2em;
      }

      .page-123b__product-grid {
        grid-template-columns: 1fr;
      }

      .page-123b__features-list {
        grid-template-columns: 1fr;
      }

      .page-123b__feature-item {
        padding: 20px;
        flex-direction: column;
        align-items: center;
        text-align: center;
      }

      .page-123b__feature-content h3 {
        margin-top: 15px;
      }

      .page-123b__feature-icon {
        width: 50px;
        height: 50px;
      }

      .page-123b__providers-grid,
      .page-123b__payments-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }

      .page-123b__floating-buttons {
        gap: 10px;
        padding: 8px 15px;
        bottom: 15px;
      }

      .page-123b__floating-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }

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

      /* List item responsive specific overrides */
      .page-123b__features-list .page-123b__feature-item,
      .page-123b__product-grid .page-123b__product-card,
      .page-123b__providers-grid .page-123b__provider-item,
      .page-123b__payments-grid .page-123b__payment-item,
      .page-123b__faq-list .page-123b__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-123b__features-list,
      .page-123b__product-grid,
      .page-123b__providers-grid,
      .page-123b__payments-grid,
      .page-123b__faq-list {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-123b__product-image,
      .page-123b__feature-icon,
      .page-123b__provider-logo,
      .page-123b__payment-logo {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-123b__faq-question,
      .page-123b__faq-answer {
        padding-left: 15px !important;
        padding-right: 15px !important;
      }
    }

    @media (max-width: 480px) {
      .page-123b__hero-title {
        font-size: 1.8em;
      }

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

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

      .page-123b__floating-buttons {
        flex-direction: column;
        width: calc(100% - 30px);
        max-width: 300px;
        bottom: 10px;
        padding: 10px;
        border-radius: 15px;
      }
      .page-123b__floating-button {
        width: 100%;
        text-align: center;
      }
    }