:root {
      --page-hello77-primary-color: #e44d26; /* Một màu cam đỏ nổi bật */
      --page-hello77-secondary-color: #ffb300; /* Màu vàng cam */
      --page-hello77-dark-color: #222;
      --page-hello77-light-color: #f5f5f5;
      --page-hello77-text-color: #333;
      --page-hello77-white-text: #fff;
      --page-hello77-border-radius: 8px;
      --page-hello77-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      --page-hello77-gradient: linear-gradient(90deg, #e44d26 0%, #ff6f61 100%);
    }

    .page-hello77 {
      font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-hello77-text-color);
      background-color: var(--page-hello77-light-color);
      overflow-x: hidden;
      padding-bottom: 80px; /* Space for fixed CTA */
    }

    .page-hello77__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
    }

    .page-hello77__section-title {
      text-align: center;
      color: var(--page-hello77-dark-color);
      font-size: 2.5em;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 15px;
    }

    .page-hello77__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background: var(--page-hello77-primary-color);
      border-radius: 2px;
    }

    .page-hello77__hero-section {
      position: relative;
      width: 100%;
      height: auto;
      text-align: center;
      color: var(--page-hello77-white-text);
      overflow: hidden;
      padding-top: 10px; /* Required spacing for fixed header */
      padding-bottom: 40px;
      background: var(--page-hello77-gradient);
    }

    .page-hello77__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      margin-bottom: 20px;
      border-radius: var(--page-hello77-border-radius);
      box-shadow: var(--page-hello77-box-shadow);
    }

    .page-hello77__hero-content {
      position: relative;
      z-index: 2;
      padding: 0 20px;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-hello77__hero-title {
      font-size: 3em;
      margin-bottom: 15px;
      color: var(--page-hello77-white-text);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-hello77__hero-subtitle {
      font-size: 1.5em;
      margin-bottom: 30px;
      color: var(--page-hello77-white-text);
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
    }

    .page-hello77__cta-button {
      display: inline-block;
      background-color: var(--page-hello77-secondary-color);
      color: var(--page-hello77-dark-color);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .page-hello77__cta-button:hover {
      background-color: #e6a200;
      transform: translateY(-3px);
    }

    .page-hello77__floating-cta {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background: var(--page-hello77-primary-color);
      color: var(--page-hello77-white-text);
      padding: 12px 25px;
      border-radius: 50px;
      text-align: center;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
      animation: page-hello77__pulse 2s infinite;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: background-color 0.3s ease;
    }

    .page-hello77__floating-cta:hover {
      background-color: #cc421f;
    }

    .page-hello77__floating-cta span {
      display: inline-block;
      vertical-align: middle;
    }

    @keyframes page-hello77__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    .page-hello77__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-hello77__game-card {
      background-color: var(--page-hello77-white-text);
      border-radius: var(--page-hello77-border-radius);
      box-shadow: var(--page-hello77-box-shadow);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-hello77__game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .page-hello77__game-image-wrapper {
      width: 100%;
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .page-hello77__game-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-hello77__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-hello77__game-title {
      font-size: 1.6em;
      color: var(--page-hello77-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-hello77__game-description {
      font-size: 0.95em;
      color: var(--page-hello77-text-color);
      margin-bottom: 15px;
    }

    .page-hello77__game-button {
      display: inline-block;
      background-color: var(--page-hello77-primary-color);
      color: var(--page-hello77-white-text);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      transition: background-color 0.3s ease;
      margin-top: auto; /* Push button to bottom */
    }

    .page-hello77__game-button:hover {
      background-color: #cc421f;
    }

    .page-hello77__promotions-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-hello77__promotion-item {
      background-color: var(--page-hello77-white-text);
      border-radius: var(--page-hello77-border-radius);
      box-shadow: var(--page-hello77-box-shadow);
      padding: 25px;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .page-hello77__promotion-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-hello77__promotion-icon {
      font-size: 3em;
      color: var(--page-hello77-secondary-color);
      margin-bottom: 15px;
    }

    .page-hello77__promotion-title {
      font-size: 1.8em;
      color: var(--page-hello77-dark-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-hello77__promotion-description {
      font-size: 1em;
      color: var(--page-hello77-text-color);
    }

    .page-hello77__about-content {
      max-width: 900px;
      margin: 0 auto;
      padding: 0 20px;
      text-align: justify;
    }

    .page-hello77__about-content h3 {
      font-size: 1.8em;
      color: var(--page-hello77-primary-color);
      margin-top: 30px;
      margin-bottom: 15px;
    }

    .page-hello77__about-content p {
      margin-bottom: 15px;
      font-size: 1.05em;
      line-height: 1.8;
    }

    .page-hello77__faq-list {
      max-width: 900px;
      margin: 40px auto 0;
    }

    .page-hello77__faq-item {
      background-color: var(--page-hello77-white-text);
      border-radius: var(--page-hello77-border-radius);
      margin-bottom: 15px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      overflow: hidden;
    }

    .page-hello77__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 25px;
      cursor: pointer;
      background-color: var(--page-hello77-primary-color);
      color: var(--page-hello77-white-text);
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-hello77__faq-question:hover {
      background-color: #cc421f;
    }

    .page-hello77__faq-question h3 {
      margin: 0;
      font-size: 1.2em; /* Ensure h3 font size matches */
      color: var(--page-hello77-white-text);
      pointer-events: none; /* Prevent h3 from blocking click */
      flex-grow: 1;
    }

    .page-hello77__faq-toggle {
      font-size: 1.8em;
      line-height: 1;
      margin-left: 15px;
      pointer-events: none; /* Prevent toggle from blocking click */
      transition: transform 0.3s ease;
    }

    .page-hello77__faq-item.active .page-hello77__faq-toggle {
      transform: rotate(45deg);
    }

    .page-hello77__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      background-color: var(--page-hello77-light-color);
      color: var(--page-hello77-text-color);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      font-size: 1em;
      line-height: 1.7;
    }

    .page-hello77__faq-item.active .page-hello77__faq-answer {
      max-height: 2000px !important; /* Sufficiently large value */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-hello77__cta-final-section {
      text-align: center;
      padding: 50px 20px;
      background: var(--page-hello77-gradient);
      color: var(--page-hello77-white-text);
      margin-top: 50px;
    }

    .page-hello77__cta-final-section h2 {
      font-size: 2.8em;
      margin-bottom: 20px;
      color: var(--page-hello77-white-text);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-hello77__cta-final-section p {
      font-size: 1.3em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-hello77__section {
        padding: 30px 15px;
      }

      .page-hello77__section-title {
        font-size: 2em;
        margin-bottom: 20px;
      }

      .page-hello77__hero-title {
        font-size: 2.2em;
      }

      .page-hello77__hero-subtitle {
        font-size: 1.2em;
      }

      .page-hello77__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-hello77__floating-cta {
        bottom: 15px;
        right: 15px;
        padding: 10px 20px;
        font-size: 0.95em;
      }

      .page-hello77__game-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-hello77__game-card {
        margin: 0 auto;
        max-width: 350px;
      }

      .page-hello77__game-image-wrapper {
        height: 180px;
      }

      .page-hello77__game-title {
        font-size: 1.4em;
      }

      .page-hello77__promotions-list {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-hello77__promotion-item {
        margin: 0 auto;
        max-width: 350px;
        padding: 20px;
      }

      .page-hello77__promotion-title {
        font-size: 1.5em;
      }

      .page-hello77__about-content h3 {
        font-size: 1.5em;
      }

      .page-hello77__about-content p {
        font-size: 0.95em;
      }

      .page-hello77__faq-question {
        padding: 15px 20px;
        font-size: 1.1em;
      }

      .page-hello77__faq-question h3 {
        font-size: 1.1em;
      }

      .page-hello77__faq-answer {
        padding: 0 20px;
      }

      .page-hello77__faq-item.active .page-hello77__faq-answer {
        padding: 15px 20px !important;
      }

      .page-hello77__cta-final-section {
        padding: 40px 15px;
      }

      .page-hello77__cta-final-section h2 {
        font-size: 2em;
      }

      .page-hello77__cta-final-section p {
        font-size: 1.1em;
      }
    }

    @media (max-width: 480px) {
      .page-hello77__hero-title {
        font-size: 1.8em;
      }

      .page-hello77__hero-subtitle {
        font-size: 1em;
      }

      .page-hello77__cta-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
    }