:root {
      --primary-color: #e44d26; /* A vibrant color for CTAs and highlights */
      --secondary-color: #333; /* Dark text */
      --background-light: #f8f8f8; /* Light background for sections */
      --background-dark: #2c3e50; /* Dark background for contrast */
      --text-light: #ffffff;
      --text-dark: #333333;
      --accent-color: #28a745; /* Green for success/bonuses */
      --border-color: #ddd;
      --header-offset: 122px; /* Default offset, overridden by shared.css if present */
    }

    .page-13-wi {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--text-dark);
      background-color: var(--background-light);
      padding-top: 10px; /* Small top padding for hero/first section as body should handle header offset */
    }

    /* Hero Section */
    .page-13-wi__hero-section {
      background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('[GALLERY:hero:1920x1080:13win1,casino,betting,vietnam]') no-repeat center center/cover;
      color: var(--text-light);
      text-align: center;
      padding: 80px 20px;
      min-height: 500px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      position: relative;
    }

    .page-13-wi__hero-title {
      font-size: 3em;
      margin-bottom: 20px;
      color: var(--text-light);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-13-wi__hero-subtitle {
      font-size: 1.5em;
      margin-bottom: 40px;
      max-width: 800px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
    }

    .page-13-wi__cta-button {
      display: inline-block;
      background-color: var(--primary-color);
      color: var(--text-light);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .page-13-wi__cta-button:hover {
      background-color: #c74320;
      transform: translateY(-2px);
    }

    /* General Section Styling */
    .page-13-wi__section {
      padding: 60px 20px;
      margin: 0 auto;
      max-width: 1200px;
      background-color: var(--text-light);
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      margin-bottom: 30px;
    }

    .page-13-wi__section--dark {
      background-color: var(--background-dark);
      color: var(--text-light);
      box-shadow: none;
      border-radius: 0;
    }

    .page-13-wi__section-title {
      font-size: 2.5em;
      color: var(--secondary-color);
      text-align: center;
      margin-bottom: 40px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-13-wi__section-title--light {
      color: var(--text-light);
    }

    .page-13-wi__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--primary-color);
      border-radius: 2px;
    }

    .page-13-wi__content-text {
      font-size: 1.1em;
      margin-bottom: 20px;
      text-align: justify;
    }

    /* Feature Grid */
    .page-13-wi__feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-13-wi__feature-item {
      background-color: var(--background-light);
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-13-wi__feature-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .page-13-wi__feature-icon {
      width: 250px; /* Min size 200x200 */
      height: 250px; /* Min size 200x200 */
      margin-bottom: 20px;
      object-fit: contain;
    }

    .page-13-wi__feature-title {
      font-size: 1.5em;
      color: var(--primary-color);
      margin-bottom: 15px;
    }

    .page-13-wi__feature-description {
      font-size: 1em;
      color: var(--secondary-color);
    }

    /* Game Categories */
    .page-13-wi__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-13-wi__game-card {
      background-color: var(--text-light);
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .page-13-wi__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }

    .page-13-wi__game-image {
      width: 100%;
      height: 200px; /* Min size 200x200 */
      object-fit: cover;
      display: block;
    }

    .page-13-wi__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-13-wi__game-title {
      font-size: 1.4em;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

    .page-13-wi__game-description {
      font-size: 0.95em;
      color: var(--secondary-color);
      margin-bottom: 15px;
      flex-grow: 1;
    }

    /* How-to Section */
    .page-13-wi__steps-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 40px;
    }

    .page-13-wi__step-item {
      background-color: var(--text-light);
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      text-align: center;
      flex: 1 1 300px;
      min-width: 280px;
      max-width: 350px;
      box-sizing: border-box;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-13-wi__step-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .page-13-wi__step-number {
      font-size: 2.5em;
      font-weight: bold;
      color: var(--primary-color);
      margin-bottom: 15px;
      display: block;
    }

    .page-13-wi__step-title {
      font-size: 1.5em;
      color: var(--secondary-color);
      margin-bottom: 15px;
    }

    .page-13-wi__step-description {
      font-size: 1em;
      color: var(--secondary-color);
    }

    /* Promotions */
    .page-13-wi__promotion-card {
      background-color: var(--text-light);
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      overflow: hidden;
      margin-bottom: 30px;
      display: flex;
      flex-direction: column;
    }

    .page-13-wi__promotion-image {
      width: 100%;
      height: 250px; /* Min size 200x200 */
      object-fit: cover;
      display: block;
    }

    .page-13-wi__promotion-content {
      padding: 25px;
      flex-grow: 1;
    }

    .page-13-wi__promotion-title {
      font-size: 1.8em;
      color: var(--primary-color);
      margin-bottom: 15px;
    }

    .page-13-wi__promotion-description {
      font-size: 1.1em;
      color: var(--secondary-color);
      margin-bottom: 20px;
    }

    .page-13-wi__promotion-expiry {
      font-size: 0.9em;
      color: #666;
      margin-top: 15px;
    }

    /* FAQ Section */
    .page-13-wi__faq-section {
      background-color: var(--background-light);
      padding: 60px 20px;
      margin: 0 auto;
      max-width: 1000px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      margin-bottom: 30px;
    }

    .page-13-wi__faq-item {
      background-color: var(--text-light);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-13-wi__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      background-color: #f0f0f0;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-13-wi__faq-question:hover {
      background-color: #e0e0e0;
    }

    .page-13-wi__faq-question h3 {
      margin: 0;
      font-size: 1.25em;
      color: var(--secondary-color);
      flex-grow: 1;
      text-align: left;
      pointer-events: none; /* Prevents text from blocking click event */
    }

    .page-13-wi__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--primary-color);
      margin-left: 15px;
      pointer-events: none; /* Prevents icon from blocking click event */
      transition: transform 0.3s ease;
    }

    .page-13-wi__faq-item.active .page-13-wi__faq-toggle {
      transform: rotate(45deg); /* Rotates + to X or - */
    }

    .page-13-wi__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      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(--text-dark);
    }

    .page-13-wi__faq-item.active .page-13-wi__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-13-wi__faq-answer p {
      margin-bottom: 10px;
      font-size: 1em;
    }

    /* Call to Action Bar */
    .page-13-wi__floating-cta {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background-color: var(--primary-color);
      color: var(--text-light);
      padding: 15px 20px;
      text-align: center;
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    .page-13-wi__floating-cta-text {
      font-size: 1.1em;
      font-weight: bold;
      margin: 0;
    }

    .page-13-wi__floating-cta-button {
      background-color: var(--accent-color);
      color: var(--text-light);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-13-wi__floating-cta-button:hover {
      background-color: #218838;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-13-wi__hero-section {
        padding: 60px 15px;
        min-height: 400px;
      }

      .page-13-wi__hero-title {
        font-size: 2.2em;
      }

      .page-13-wi__hero-subtitle {
        font-size: 1.2em;
        margin-bottom: 30px;
      }

      .page-13-wi__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-13-wi__section {
        padding: 40px 15px;
        margin-bottom: 20px;
      }

      .page-13-wi__section-title {
        font-size: 2em;
        margin-bottom: 30px;
      }

      .page-13-wi__content-text {
        font-size: 1em;
      }

      .page-13-wi__feature-grid,
      .page-13-wi__game-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-13-wi__feature-item,
      .page-13-wi__game-card,
      .page-13-wi__step-item,
      .page-13-wi__promotion-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important; /* Adjust padding for mobile */
      }

      .page-13-wi__game-image,
      .page-13-wi__promotion-image {
        height: 180px;
      }

      .page-13-wi__step-item {
        max-width: 100%;
        margin-bottom: 20px;
      }

      .page-13-wi__faq-section {
        padding: 40px 15px;
      }

      .page-13-wi__faq-question {
        padding: 15px 20px;
      }

      .page-13-wi__faq-question h3 {
        font-size: 1.1em;
      }

      .page-13-wi__faq-toggle {
        font-size: 1.5em;
      }

      .page-13-wi__faq-answer {
        padding: 15px 20px !important; /* Adjust padding for mobile */
      }

      .page-13-wi__floating-cta {
        flex-direction: column;
        padding: 10px 15px;
        gap: 10px;
      }

      .page-13-wi__floating-cta-text {
        font-size: 1em;
      }

      .page-13-wi__floating-cta-button {
        padding: 8px 15px;
        font-size: 0.9em;
        width: 100%; /* Make button full width on mobile */
      }

      /* Image responsive for all images */
      .page-13-wi img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-13-wi__game-image, .page-13-wi__promotion-image, .page-13-wi__feature-icon {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
    }