:root {
      --page-xocdiagame-primary-color: #f39c12; /* Màu cam */
      --page-xocdiagame-secondary-color: #e67e22; /* Cam đậm */
      --page-xocdiagame-dark-bg: #2c3e50; /* Xanh đậm */
      --page-xocdiagame-light-bg: #ecf0f1; /* Xám nhạt */
      --page-xocdiagame-text-color: #34495e; /* Xám xanh */
      --page-xocdiagame-white: #ffffff;
      --page-xocdiagame-border-radius: 8px;
      --page-xocdiagame-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .page-xocdiagame {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-xocdiagame-text-color);
      background-color: var(--page-xocdiagame-light-bg);
      padding-bottom: 80px; /* Space for floating button */
    }

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

    .page-xocdiagame__section--dark {
      background-color: var(--page-xocdiagame-dark-bg);
      color: var(--page-xocdiagame-white);
    }

    .page-xocdiagame__hero-section {
      position: relative;
      background-color: var(--page-xocdiagame-dark-bg);
      color: var(--page-xocdiagame-white);
      text-align: center;
      padding-top: 100px; /* Adjust for fixed header */
      padding-bottom: 60px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }

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

    .page-xocdiagame__hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-xocdiagame__main-title {
      font-size: 3.2em;
      margin-bottom: 20px;
      color: var(--page-xocdiagame-primary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-xocdiagame__hero-subtitle {
      font-size: 1.4em;
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
      color: var(--page-xocdiagame-light-bg);
    }

    .page-xocdiagame__download-button {
      display: inline-block;
      background-color: var(--page-xocdiagame-primary-color);
      color: var(--page-xocdiagame-white);
      padding: 15px 30px;
      border-radius: var(--page-xocdiagame-border-radius);
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-xocdiagame__download-button:hover {
      background-color: var(--page-xocdiagame-secondary-color);
      transform: translateY(-2px);
    }

    .page-xocdiagame__heading {
      font-size: 2.5em;
      color: var(--page-xocdiagame-dark-bg);
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-xocdiagame__heading--white {
      color: var(--page-xocdiagame-white);
    }

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

    .page-xocdiagame__text-content {
      text-align: left;
      margin-bottom: 30px;
      font-size: 1.1em;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-xocdiagame__text-content p {
      margin-bottom: 1em;
    }

    .page-xocdiagame__image-container {
      margin: 30px auto;
      max-width: 800px;
      border-radius: var(--page-xocdiagame-border-radius);
      overflow: hidden;
      box-shadow: var(--page-xocdiagame-box-shadow);
    }

    .page-xocdiagame__image {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .page-xocdiagame__steps-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-xocdiagame__step-item {
      background-color: var(--page-xocdiagame-white);
      border-radius: var(--page-xocdiagame-border-radius);
      box-shadow: var(--page-xocdiagame-box-shadow);
      padding: 30px;
      flex: 1;
      min-width: 280px;
      max-width: 380px;
      text-align: left;
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-xocdiagame__step-item:hover {
      transform: translateY(-5px);
    }

    .page-xocdiagame__step-number {
      font-size: 2em;
      color: var(--page-xocdiagame-primary-color);
      font-weight: bold;
      margin-bottom: 15px;
      display: block;
    }

    .page-xocdiagame__step-title {
      font-size: 1.5em;
      color: var(--page-xocdiagame-dark-bg);
      margin-bottom: 10px;
    }

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

    .page-xocdiagame__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-xocdiagame__feature-card {
      background-color: var(--page-xocdiagame-white);
      border-radius: var(--page-xocdiagame-border-radius);
      box-shadow: var(--page-xocdiagame-box-shadow);
      padding: 30px;
      text-align: center;
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-xocdiagame__feature-card:hover {
      transform: translateY(-5px);
    }

    .page-xocdiagame__feature-icon {
      width: 100px;
      height: 100px;
      margin-bottom: 20px;
      display: block;
      margin-left: auto;
      margin-right: auto;
      max-width: 100%;
      object-fit: contain;
    }

    .page-xocdiagame__feature-title {
      font-size: 1.4em;
      color: var(--page-xocdiagame-primary-color);
      margin-bottom: 15px;
    }

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

    .page-xocdiagame__games-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-xocdiagame__game-card {
      background-color: var(--page-xocdiagame-white);
      border-radius: var(--page-xocdiagame-border-radius);
      box-shadow: var(--page-xocdiagame-box-shadow);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-xocdiagame__game-card:hover {
      transform: translateY(-5px);
    }

    .page-xocdiagame__game-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }

    .page-xocdiagame__game-info {
      padding: 20px;
    }

    .page-xocdiagame__game-title {
      font-size: 1.3em;
      color: var(--page-xocdiagame-dark-bg);
      margin-bottom: 10px;
    }

    .page-xocdiagame__game-description {
      font-size: 0.95em;
      color: var(--page-xocdiagame-text-color);
    }

    .page-xocdiagame__faq-section {
      background-color: var(--page-xocdiagame-white);
    }

    .page-xocdiagame__faq-list {
      max-width: 900px;
      margin: 40px auto 0;
      list-style: none;
      padding: 0;
    }

    .page-xocdiagame__faq-item {
      border: 1px solid #ddd;
      border-radius: var(--page-xocdiagame-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .page-xocdiagame__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #f7f7f7;
      cursor: pointer;
      user-select: none;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-xocdiagame-dark-bg);
      transition: background-color 0.3s ease;
    }

    .page-xocdiagame__faq-question:hover {
      background-color: #eee;
    }

    .page-xocdiagame__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--page-xocdiagame-dark-bg);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-xocdiagame__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
      color: var(--page-xocdiagame-primary-color);
    }

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

    .page-xocdiagame__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      background-color: var(--page-xocdiagame-white);
      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;
    }

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

    .page-xocdiagame__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: #e74c3c; /* Red color for urgency */
      color: var(--page-xocdiagame-white);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.2s ease;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-xocdiagame__floating-button:hover {
      background-color: #c0392b;
      transform: translateX(-50%) translateY(-3px);
    }

    .page-xocdiagame__floating-button-icon {
      width: 24px;
      height: 24px;
      object-fit: contain;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-xocdiagame__hero-section {
        padding-top: 80px; /* Adjust for mobile fixed header */
        padding-bottom: 40px;
      }
      .page-xocdiagame__main-title {
        font-size: 2.2em;
      }
      .page-xocdiagame__hero-subtitle {
        font-size: 1.1em;
      }
      .page-xocdiagame__download-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-xocdiagame__heading {
        font-size: 2em;
      }
      .page-xocdiagame__section {
        padding: 30px 15px;
      }
      .page-xocdiagame__steps-list {
        flex-direction: column;
        align-items: center;
      }
      .page-xocdiagame__step-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 20px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }
      .page-xocdiagame__features-grid,
      .page-xocdiagame__games-grid {
        grid-template-columns: 1fr;
      }
      .page-xocdiagame__feature-card,
      .page-xocdiagame__game-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
      }
      .page-xocdiagame__game-image {
        height: 150px;
      }
      .page-xocdiagame__faq-question,
      .page-xocdiagame__faq-question h3 {
        font-size: 1em;
      }
      .page-xocdiagame__faq-answer {
        padding: 0 15px;
      }
      .page-xocdiagame__faq-item.active .page-xocdiagame__faq-answer {
        padding: 15px !important;
      }
      .page-xocdiagame__floating-button {
        width: calc(100% - 40px);
        max-width: 350px;
        font-size: 1em;
        padding: 12px 20px;
        text-align: center;
        justify-content: center;
      }
      .page-xocdiagame__image-container {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        overflow: hidden;
      }
      .page-xocdiagame__image {
        max-width: 100%;
        height: auto;
      }
    }