/* CSS cho trang Đăng Ký Nhận 88K */
    :root {
      --page-primary-color: #FFD700; /* Gold */
      --page-secondary-color: #DC143C; /* Crimson */
      --page-dark-bg: #1a1a1a;
      --page-light-text: #ffffff;
      --page-dark-text: #333333;
      --page-border-radius: 8px;
      --page-spacing-md: 20px;
      --page-spacing-lg: 40px;
    }

    .page-ng-k-nh-n-88k {
      font-family: 'Arial', sans-serif;
      color: var(--page-light-text);
      background-color: var(--page-dark-bg);
      line-height: 1.6;
    }

    .page-ng-k-nh-n-88k__section-title {
      text-align: center;
      font-size: 2.5em;
      margin-bottom: var(--page-spacing-lg);
      color: var(--page-primary-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      padding: 0 15px;
      box-sizing: border-box;
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__section-subtitle {
      text-align: center;
      font-size: 1.2em;
      margin-bottom: var(--page-spacing-lg);
      color: var(--page-light-text);
      padding: 0 15px;
      box-sizing: border-box;
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__hero-section {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 10px var(--page-spacing-md) var(--page-spacing-lg);
      background: linear-gradient(135deg, #2c3e50, #1a1a1a);
      min-height: 500px;
      position: relative;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__hero-content {
      z-index: 1;
      max-width: 900px;
      margin-bottom: var(--page-spacing-md);
    }

    .page-ng-k-nh-n-88k__hero-title {
      font-size: 3.5em;
      color: var(--page-primary-color);
      margin-bottom: 15px;
      text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__hero-description {
      font-size: 1.3em;
      color: var(--page-light-text);
      margin-bottom: var(--page-spacing-md);
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__hero-button,
    .page-ng-k-nh-n-88k__cta-button,
    .page-ng-k-nh-n-88k__cta-final-button {
      display: inline-block;
      background-color: var(--page-secondary-color);
      color: var(--page-light-text);
      padding: 15px 30px;
      border-radius: var(--page-border-radius);
      text-decoration: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__hero-button:hover,
    .page-ng-k-nh-n-88k__cta-button:hover,
    .page-ng-k-nh-n-88k__cta-final-button:hover {
      background-color: #B2002A;
      transform: translateY(-3px);
    }

    .page-ng-k-nh-n-88k__hero-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-top: var(--page-spacing-md);
    }

    .page-ng-k-nh-n-88k__hero-image {
      max-width: 100%;
      height: auto;
      border-radius: var(--page-border-radius);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-ng-k-nh-n-88k__benefits-section,
    .page-ng-k-nh-n-88k__how-to-register-section,
    .page-ng-k-nh-n-88k__games-showcase-section,
    .page-ng-k-nh-n-88k__faq-section,
    .page-ng-k-nh-n-88k__cta-final-section {
      padding: var(--page-spacing-lg) var(--page-spacing-md);
      max-width: 1200px;
      margin: 0 auto;
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__benefits-grid,
    .page-ng-k-nh-n-88k__steps-grid,
    .page-ng-k-nh-n-88k__games-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: var(--page-spacing-md);
      margin-top: var(--page-spacing-md);
    }

    .page-ng-k-nh-n-88k__benefit-item,
    .page-ng-k-nh-n-88k__step-item,
    .page-ng-k-nh-n-88k__game-card {
      background-color: #2c2c2c;
      padding: var(--page-spacing-md);
      border-radius: var(--page-border-radius);
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__benefit-item:hover,
    .page-ng-k-nh-n-88k__step-item:hover,
    .page-ng-k-nh-n-88k__game-card:hover {
      transform: translateY(-5px);
    }

    .page-ng-k-nh-n-88k__benefit-icon,
    .page-ng-k-nh-n-88k__game-image {
      max-width: 100%;
      height: auto;
      margin-bottom: 15px;
      border-radius: var(--page-border-radius);
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__benefit-title,
    .page-ng-k-nh-n-88k__step-title,
    .page-ng-k-nh-n-88k__game-title {
      font-size: 1.5em;
      color: var(--page-primary-color);
      margin-bottom: 10px;
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__benefit-description,
    .page-ng-k-nh-n-88k__step-description,
    .page-ng-k-nh-n-88k__game-description {
      font-size: 1em;
      color: var(--page-light-text);
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__step-number {
      width: 50px;
      height: 50px;
      background-color: var(--page-secondary-color);
      color: var(--page-light-text);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8em;
      font-weight: bold;
      margin: 0 auto 15px auto;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-ng-k-nh-n-88k__cta-button-wrapper {
      text-align: center;
      margin-top: var(--page-spacing-lg);
    }

    .page-ng-k-nh-n-88k__games-showcase-section .page-ng-k-nh-n-88k__section-title {
      margin-bottom: 10px;
    }

    .page-ng-k-nh-n-88k__faq-container {
      margin-top: var(--page-spacing-md);
      border: 1px solid #3a3a3a;
      border-radius: var(--page-border-radius);
      overflow: hidden;
    }

    .page-ng-k-nh-n-88k__faq-item {
      border-bottom: 1px solid #3a3a3a;
    }

    .page-ng-k-nh-n-88k__faq-item:last-child {
      border-bottom: none;
    }

    .page-ng-k-nh-n-88k__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px var(--page-spacing-md);
      background-color: #2c2c2c;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__faq-question:hover {
      background-color: #3a3a3a;
    }

    .page-ng-k-nh-n-88k__faq-question-text {
      font-size: 1.2em;
      color: var(--page-primary-color);
      margin: 0;
      flex-grow: 1;
      text-align: left;
      pointer-events: none;
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__faq-toggle {
      font-size: 1.8em;
      color: var(--page-primary-color);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none;
      line-height: 1;
    }

    .page-ng-k-nh-n-88k__faq-item.active .page-ng-k-nh-n-88k__faq-toggle {
      transform: rotate(45deg);
      content: '−'; /* This won't work in CSS, handled by JS */
    }

    .page-ng-k-nh-n-88k__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 var(--page-spacing-md);
      background-color: #222222;
      color: var(--page-light-text);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      box-sizing: border-box;
    }

    .page-ng-k-nh-n-88k__faq-item.active .page-ng-k-nh-n-88k__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px var(--page-spacing-md) !important;
      opacity: 1;
    }

    .page-ng-k-nh-n-88k__faq-answer p {
      margin: 0;
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__cta-final-section {
      text-align: center;
      background: linear-gradient(45deg, #DC143C, #8B0000);
      border-radius: var(--page-border-radius);
      margin-top: var(--page-spacing-lg);
      padding: var(--page-spacing-lg);
      box-sizing: border-box;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    }

    .page-ng-k-nh-n-88k__cta-final-title {
      font-size: 2.5em;
      color: var(--page-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      word-wrap: break-word;
    }

    .page-ng-k-nh-n-88k__cta-final-description {
      font-size: 1.2em;
      color: var(--page-light-text);
      margin-bottom: var(--page-spacing-md);
      word-wrap: break-word;
    }

    /* Responsive Adjustments */
    @media (max-width: 768px) {
      .page-ng-k-nh-n-88k__section-title {
        font-size: 2em;
      }

      .page-ng-k-nh-n-88k__hero-title {
        font-size: 2.5em;
      }

      .page-ng-k-nh-n-88k__hero-description {
        font-size: 1em;
      }

      .page-ng-k-nh-n-88k__hero-button,
      .page-ng-k-nh-n-88k__cta-button,
      .page-ng-k-nh-n-88k__cta-final-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-ng-k-nh-n-88k__benefits-grid,
      .page-ng-k-nh-n-88k__steps-grid,
      .page-ng-k-nh-n-88k__games-grid {
        grid-template-columns: 1fr;
      }

      .page-ng-k-nh-n-88k__benefit-item,
      .page-ng-k-nh-n-88k__step-item,
      .page-ng-k-nh-n-88k__game-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 15px;
      }

      .page-ng-k-nh-n-88k__benefits-grid > div,
      .page-ng-k-nh-n-88k__steps-grid > div,
      .page-ng-k-nh-n-88k__games-grid > div {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-ng-k-nh-n-88k__benefit-icon,
      .page-ng-k-nh-n-88k__game-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-ng-k-nh-n-88k__faq-question {
        padding: 12px 15px;
      }

      .page-ng-k-nh-n-88k__faq-question-text {
        font-size: 1em;
      }

      .page-ng-k-nh-n-88k__faq-answer {
        padding: 0 15px;
      }

      .page-ng-k-nh-n-88k__faq-item.active .page-ng-k-nh-n-88k__faq-answer {
        padding: 15px 15px !important;
      }

      .page-ng-k-nh-n-88k__cta-final-title {
        font-size: 2em;
      }

      .page-ng-k-nh-n-88k__cta-final-description {
        font-size: 1em;
      }

      .page-ng-k-nh-n-88k__hero-section,
      .page-ng-k-nh-n-88k__benefits-section,
      .page-ng-k-nh-n-88k__how-to-register-section,
      .page-ng-k-nh-n-88k__games-showcase-section,
      .page-ng-k-nh-n-88k__faq-section,
      .page-ng-k-nh-n-88k__cta-final-section {
        padding-left: 15px;
        padding-right: 15px;
      }
    }

    @media (max-width: 480px) {
      .page-ng-k-nh-n-88k__hero-title {
        font-size: 2em;
      }

      .page-ng-k-nh-n-88k__section-title {
        font-size: 1.8em;
      }

      .page-ng-k-nh-n-88k__cta-final-title {
        font-size: 1.8em;
      }
    }