:root {
      --page-win78-primary-color: #e44d26; /* Cam đỏ */
      --page-win78-secondary-color: #2c3e50; /* Xám đậm */
      --page-win78-accent-color: #f39c12; /* Vàng cam */
      --page-win78-text-color: #ecf0f1; /* Trắng nhạt */
      --page-win78-bg-dark: #1a1a1a;
      --page-win78-bg-light: #2a2a2a;
      --page-win78-border-radius: 8px;
      --page-win78-padding-section: 40px 20px;
      --page-win78-mobile-padding-section: 20px 15px;
    }

    .page-win78 {
      font-family: 'Arial', sans-serif;
      color: var(--page-win78-text-color);
      background-color: var(--page-win78-bg-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-win78__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
      box-sizing: border-box;
    }

    .page-win78__section {
      padding: var(--page-win78-padding-section);
      text-align: center;
      position: relative;
    }

    .page-win78__section--dark {
      background-color: var(--page-win78-bg-light);
    }

    .page-win78__heading {
      color: var(--page-win78-primary-color);
      font-size: 2.5em;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .page-win78__subheading {
      color: var(--page-win78-accent-color);
      font-size: 1.8em;
      margin-bottom: 15px;
    }

    .page-win78__text {
      font-size: 1.1em;
      margin-bottom: 20px;
    }

    /* Hero Section */
    .page-win78__hero-section {
      position: relative;
      width: 100%;
      overflow: hidden;
      padding-top: 10px; /* For fixed header */
      background-color: var(--page-win78-bg-dark);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    .page-win78__hero-banner {
      width: 100%;
      max-height: 500px; /* Limit banner height */
      object-fit: cover;
      display: block;
    }

    .page-win78__hero-content {
      position: relative;
      padding: 20px 15px;
      z-index: 1;
      max-width: 900px;
    }

    .page-win78__hero-title {
      font-size: 3em;
      color: var(--page-win78-primary-color);
      margin-bottom: 10px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-win78__hero-description {
      font-size: 1.2em;
      color: var(--page-win78-text-color);
      margin-bottom: 30px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    /* Floating Login Button */
    .page-win78__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-win78-accent-color);
      border-radius: 50px;
      padding: 12px 25px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      animation: page-win78-pulse 2s infinite;
      cursor: pointer;
    }

    .page-win78__floating-button-link {
      color: #fff;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      display: block;
      white-space: nowrap;
    }

    @keyframes page-win78-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Game Categories */
    .page-win78__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
      justify-content: center;
    }

    .page-win78__game-card {
      background-color: var(--page-win78-bg-dark);
      border-radius: var(--page-win78-border-radius);
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      border: 1px solid var(--page-win78-secondary-color);
      display: flex;
      flex-direction: column;
    }

    .page-win78__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-win78__game-card-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
    }

    .page-win78__game-card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .page-win78__game-card-content {
      padding: 20px 15px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-win78__game-card-title {
      font-size: 1.4em;
      color: var(--page-win78-primary-color);
      margin-bottom: 10px;
    }

    .page-win78__game-card-description {
      font-size: 0.95em;
      color: var(--page-win78-text-color);
      margin-bottom: 15px;
    }

    /* Promotions Section */
    .page-win78__promotion-item {
      background-color: var(--page-win78-bg-dark);
      border-radius: var(--page-win78-border-radius);
      padding: 25px;
      margin-bottom: 20px;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
      text-align: left;
      border: 1px solid var(--page-win78-secondary-color);
    }

    .page-win78__promotion-title {
      color: var(--page-win78-accent-color);
      font-size: 1.5em;
      margin-bottom: 10px;
    }

    .page-win78__promotion-description {
      color: var(--page-win78-text-color);
      font-size: 1em;
    }

    /* FAQ Section */
    .page-win78__faq-list {
      margin-top: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      text-align: left;
    }

    .page-win78__faq-item {
      background-color: var(--page-win78-bg-light);
      border-radius: var(--page-win78-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      border: 1px solid var(--page-win78-secondary-color);
    }

    .page-win78__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      background-color: var(--page-win78-secondary-color);
      color: var(--page-win78-text-color);
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-win78__faq-question:hover {
      background-color: #3a4b5c; /* Slightly lighter secondary */
    }

    .page-win78__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--page-win78-text-color);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-win78__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      color: var(--page-win78-primary-color);
      pointer-events: none; /* Prevent toggle icon from blocking click event */
      transition: transform 0.3s ease;
    }

    .page-win78__faq-item.active .page-win78__faq-toggle {
      transform: rotate(45deg);
    }

    .page-win78__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      opacity: 0;
      color: var(--page-win78-text-color);
      background-color: var(--page-win78-bg-dark);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
    }

    .page-win78__faq-item.active .page-win78__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 15px !important;
      opacity: 1;
    }

    .page-win78__faq-answer p {
      margin-bottom: 10px;
      font-size: 0.95em;
    }

    /* Call to Action */
    .page-win78__cta-button {
      display: inline-block;
      background-color: var(--page-win78-primary-color);
      color: #fff;
      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;
      margin-top: 20px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .page-win78__cta-button:hover {
      background-color: #c0392b; /* Darker primary */
      transform: translateY(-2px);
    }

    /* General Image Styling */
    .page-win78 img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto; /* Center images */
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-win78__hero-section {
        padding-top: 10px; /* Adjust for mobile fixed header */
      }

      .page-win78__hero-title {
        font-size: 2.2em;
      }

      .page-win78__hero-description {
        font-size: 1em;
      }

      .page-win78__heading {
        font-size: 2em;
      }

      .page-win78__subheading {
        font-size: 1.5em;
      }

      .page-win78__text {
        font-size: 1em;
      }

      .page-win78__section {
        padding: var(--page-win78-mobile-padding-section);
      }

      .page-win78__game-grid {
        grid-template-columns: 1fr;
      }

      .page-win78__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 10px 20px;
        font-size: 1em;
      }

      .page-win78__floating-button-link {
        font-size: 1em;
      }

      .page-win78__faq-question h3 {
        font-size: 1em;
      }

      .page-win78__faq-answer {
        padding: 0 10px;
      }

      .page-win78__faq-item.active .page-win78__faq-answer {
        padding: 15px 10px !important;
      }

      /* Force responsive image styles for mobile */
      .page-win78__game-card-image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
      .page-win78__game-card-image {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-win78__hero-banner {
        max-width: 100% !important;
        height: auto !important;
      }
    }