:root {
      --page-tf88-primary-color: #e44d26; /* Cam đỏ */
      --page-tf88-secondary-color: #f7931e; /* Cam */
      --page-tf88-dark-bg: #1a1a1a; /* Nền tối */
      --page-tf88-light-bg: #f5f5f5; /* Nền sáng */
      --page-tf88-text-light: #ffffff; /* Chữ sáng */
      --page-tf88-text-dark: #333333; /* Chữ tối */
      --page-tf88-accent-green: #28a745; /* Xanh lá nhấn */
      --page-tf88-accent-blue: #007bff; /* Xanh dương nhấn */
    }

    .page-tf88 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-tf88-text-dark);
      background-color: var(--page-tf88-light-bg);
      padding-bottom: 80px; /* Để tạo khoảng trống cho nút nổi */
    }

    .page-tf88__section {
      padding: 40px 20px;
      margin-bottom: 20px;
      background-color: var(--page-tf88-text-light);
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .page-tf88__section--dark {
      background-color: var(--page-tf88-dark-bg);
      color: var(--page-tf88-text-light);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    .page-tf88__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-tf88__hero-section {
      background: linear-gradient(135deg, var(--page-tf88-primary-color), var(--page-tf88-secondary-color));
      color: var(--page-tf88-text-light);
      text-align: center;
      padding: 60px 20px;
      border-radius: 0 0 15px 15px;
      margin-bottom: 20px;
      padding-top: 10px; /* Nhẹ nhàng đẩy xuống dưới header placeholder */
    }

    .page-tf88__hero-title {
      font-size: 2.8em;
      margin-bottom: 10px;
      font-weight: bold;
      color: var(--page-tf88-text-light);
    }

    .page-tf88__hero-subtitle {
      font-size: 1.5em;
      margin-bottom: 20px;
      font-weight: normal;
      color: var(--page-tf88-text-light);
    }

    .page-tf88__button {
      display: inline-block;
      background-color: var(--page-tf88-accent-green);
      color: var(--page-tf88-text-light);
      padding: 12px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-tf88__button:hover {
      background-color: #218838;
      transform: translateY(-2px);
    }

    .page-tf88__button--secondary {
      background-color: var(--page-tf88-accent-blue);
    }

    .page-tf88__button--secondary:hover {
      background-color: #0056b3;
    }

    .page-tf88__title {
      font-size: 2em;
      color: var(--page-tf88-primary-color);
      text-align: center;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-tf88__title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--page-tf88-secondary-color);
      border-radius: 2px;
    }

    .page-tf88__text-center {
      text-align: center;
      margin-bottom: 20px;
    }

    .page-tf88__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-tf88__grid-item {
      background-color: var(--page-tf88-light-bg);
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      box-sizing: border-box;
    }

    .page-tf88__grid-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-tf88__grid-item-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      border-bottom: 2px solid var(--page-tf88-secondary-color);
    }

    .page-tf88__grid-item-content {
      padding: 20px;
      flex-grow: 1;
    }

    .page-tf88__grid-item-title {
      font-size: 1.4em;
      color: var(--page-tf88-primary-color);
      margin-bottom: 10px;
    }

    .page-tf88__grid-item-description {
      font-size: 0.95em;
      color: var(--page-tf88-text-dark);
    }

    .page-tf88__list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      grid-template-columns: 1fr;
      gap: 15px;
    }

    .page-tf88__list-item {
      background-color: var(--page-tf88-text-light);
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      display: flex;
      align-items: center;
      gap: 15px;
      box-sizing: border-box;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .page-tf88__list-item-icon {
      font-size: 1.5em;
      color: var(--page-tf88-primary-color);
      flex-shrink: 0;
    }

    .page-tf88__list-item-text {
      color: var(--page-tf88-text-dark);
      font-size: 1.05em;
    }

    /* Floating action buttons */
    .page-tf88__floating-buttons {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      display: flex;
      justify-content: space-around;
      padding: 10px 0;
      background-color: rgba(0, 0, 0, 0.85);
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
      z-index: 1000;
    }

    .page-tf88__floating-button {
      flex: 1;
      text-align: center;
      padding: 10px 5px;
      margin: 0 5px;
      border-radius: 5px;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease;
      color: var(--page-tf88-text-light);
      font-size: 1.1em;
      border: 1px solid transparent;
      box-sizing: border-box;
    }

    .page-tf88__floating-button--register {
      background-color: var(--page-tf88-accent-green);
      border-color: var(--page-tf88-accent-green);
    }

    .page-tf88__floating-button--register:hover {
      background-color: #218838;
    }

    .page-tf88__floating-button--login {
      background-color: var(--page-tf88-accent-blue);
      border-color: var(--page-tf88-accent-blue);
    }

    .page-tf88__floating-button--login:hover {
      background-color: #0056b3;
    }

    /* FAQ Section */
    .page-tf88__faq-section {
      padding: 40px 20px;
      background-color: var(--page-tf88-text-light);
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .page-tf88__faq-item {
      border-bottom: 1px solid #eee;
      margin-bottom: 10px;
    }

    .page-tf88__faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
    }

    .page-tf88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 0;
      cursor: pointer;
      user-select: none;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-tf88-text-dark);
      transition: color 0.3s ease;
    }

    .page-tf88__faq-question:hover {
      color: var(--page-tf88-primary-color);
    }

    .page-tf88__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      pointer-events: none; /* Prevent h3 from blocking click on parent */
      color: inherit; /* Ensure color transition works */
    }

    .page-tf88__faq-toggle {
      font-size: 1.5em;
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent */
      color: var(--page-tf88-primary-color);
    }

    .page-tf88__faq-item.active .page-tf88__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-tf88__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;
      color: var(--page-tf88-text-dark);
    }

    .page-tf88__faq-item.active .page-tf88__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-tf88__hero-title {
        font-size: 2.2em;
      }

      .page-tf88__hero-subtitle {
        font-size: 1.2em;
      }

      .page-tf88__title {
        font-size: 1.8em;
      }

      .page-tf88__section {
        padding: 30px 15px;
      }

      .page-tf88__grid {
        grid-template-columns: 1fr;
      }

      .page-tf88__grid-item-image {
        height: 180px;
      }

      .page-tf88__list-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 15px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
      }

      .page-tf88__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-tf88__grid-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
      }

      .page-tf88__floating-button {
        font-size: 1em;
        padding: 10px 3px;
        margin: 0 3px;
      }

      .page-tf88__faq-question {
        font-size: 1em;
        padding: 12px 0;
      }

      .page-tf88__faq-answer {
        padding: 15px 10px !important;
      }
    }

    /* Image responsiveness */
    .page-tf88 img {
      max-width: 100%;
      height: auto;
      display: block; /* Remove extra space below images */
    }
    @media (max-width: 768px) {
      .page-tf88 img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-tf88__grid-item-image {
        max-width: 100% !important;
        height: auto !important;
      }
    }