:root {
      --page-vn586-bg-color: #000000;
      --page-vn586-text-color: #ffffff;
      --page-vn586-highlight-color: #ffd700; /* Gold/Yellow */
      --page-vn586-secondary-bg: #1a1a1a;
      --page-vn586-border-color: #333333;
      --page-vn586-button-bg: #ffd700;
      --page-vn586-button-text: #000000;
      --page-vn586-button-hover-bg: #ffeb3b;
      --page-vn586-promo-button-bg: #ff4500; /* Orange-red for urgency */
      --page-vn586-promo-button-hover-bg: #ff6347;
    }

    .page-vn586 {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-vn586-bg-color);
      color: var(--page-vn586-text-color);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* Padding for all content sections */
    .page-vn586__hero-section,
    .page-vn586__about-section,
    .page-vn586__game-categories,
    .page-vn586__promotion-section,
    .page-vn586__guide-section,
    .page-vn586__download-app,
    .page-vn586__faq-section,
    .page-vn586__cta-section {
        padding: 60px 20px; /* Default padding for sections */
        max-width: 1200px;
        margin-left: auto;
        margin-right: auto;
        box-sizing: border-box;
    }

    /* Specific top padding for the first content section to avoid header overlap */
    .page-vn586__hero-section {
        padding-top: 160px; /* Desktop: 160px for fixed header */
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 30px;
        background-color: var(--page-vn586-secondary-bg);
        border-bottom: 2px solid var(--page-vn586-highlight-color);
    }

    .page-vn586__hero-content {
        max-width: 800px;
    }

    .page-vn586__hero-title {
      font-size: 2.8em;
      color: var(--page-vn586-highlight-color);
      margin-bottom: 15px;
      line-height: 1.2;
    }

    .page-vn586__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: #ccc;
    }

    .page-vn586__hero-button {
      display: inline-block;
      background-color: var(--page-vn586-button-bg);
      color: var(--page-vn586-button-text);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
    }

    .page-vn586__hero-button:hover {
      background-color: var(--page-vn586-button-hover-bg);
      transform: translateY(-2px);
    }

    .page-vn586__hero-image-wrapper {
        width: 100%;
        max-width: 900px;
        overflow: hidden;
        box-sizing: border-box;
        border-radius: 10px;
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .page-vn586__hero-image {
        display: block;
        width: 100%;
        height: auto;
        object-fit: contain; /* Ensure original ratio is maintained */
        border-radius: 10px;
    }

    .page-vn586__section-title {
      font-size: 2.2em;
      color: var(--page-vn586-highlight-color);
      text-align: center;
      margin-bottom: 20px;
      position: relative;
    }

    .page-vn586__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: var(--page-vn586-highlight-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-vn586__section-description {
      font-size: 1.1em;
      text-align: center;
      margin-bottom: 40px;
      color: #ccc;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-vn586__about-section {
        background-color: var(--page-vn586-bg-color);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__about-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-vn586__feature-item {
      background-color: var(--page-vn586-secondary-bg);
      padding: 30px;
      border-radius: 10px;
      text-align: center;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-vn586-border-color);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-vn586__feature-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }

    .page-vn586__feature-icon {
        width: 100px; /* Display size, source image must be >= 200x200px */
        height: 100px;
        max-width: 100%;
        height: auto;
        margin-bottom: 20px;
        object-fit: contain;
    }

    .page-vn586__feature-title {
      font-size: 1.5em;
      color: var(--page-vn586-highlight-color);
      margin-bottom: 10px;
    }

    .page-vn586__feature-text {
      color: #bbb;
    }

    .page-vn586__game-categories {
        background-color: var(--page-vn586-secondary-bg);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
    }

    .page-vn586__game-card {
      background-color: var(--page-vn586-bg-color);
      border-radius: 10px;
      overflow: hidden;
      text-decoration: none;
      color: var(--page-vn586-text-color);
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-vn586-border-color);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding-bottom: 20px;
    }

    .page-vn586__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(255, 215, 0, 0.2);
    }

    .page-vn586__game-image {
        width: 100%;
        height: 180px; /* Fixed height for consistency */
        object-fit: cover;
        margin-bottom: 15px;
        border-bottom: 1px solid var(--page-vn586-border-color);
    }

    .page-vn586__game-title {
      font-size: 1.4em;
      color: var(--page-vn586-highlight-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-vn586__game-description {
      font-size: 0.95em;
      color: #bbb;
      padding: 0 15px;
    }

    .page-vn586__promotion-section {
        background-color: var(--page-vn586-bg-color);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__promo-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .page-vn586__promo-card {
      background-color: var(--page-vn586-secondary-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-vn586-border-color);
      text-align: center;
      padding-bottom: 20px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-vn586__promo-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(255, 215, 0, 0.2);
    }

    .page-vn586__promo-image {
        width: 100%;
        height: 200px; /* Fixed height */
        object-fit: cover;
        margin-bottom: 15px;
        border-bottom: 1px solid var(--page-vn586-border-color);
    }

    .page-vn586__promo-title {
      font-size: 1.5em;
      color: var(--page-vn586-highlight-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-vn586__promo-text {
      font-size: 1em;
      color: #bbb;
      margin-bottom: 20px;
      padding: 0 15px;
    }

    .page-vn586__promo-button {
      display: inline-block;
      background-color: var(--page-vn586-highlight-color);
      color: var(--page-vn586-button-text);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-vn586__promo-button:hover {
      background-color: var(--page-vn586-button-hover-bg);
    }

    .page-vn586__guide-section {
        background-color: var(--page-vn586-secondary-bg);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__guide-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-vn586__guide-item {
      background-color: var(--page-vn586-bg-color);
      padding: 25px;
      border-radius: 10px;
      text-align: center;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--page-vn586-border-color);
    }

    .page-vn586__guide-icon {
        width: 80px; /* Display size, source image must be >= 200x200px */
        height: 80px;
        max-width: 100%;
        height: auto;
        margin-bottom: 15px;
        object-fit: contain;
    }

    .page-vn586__guide-title {
      font-size: 1.3em;
      color: var(--page-vn586-highlight-color);
      margin-bottom: 10px;
    }

    .page-vn586__guide-text {
      font-size: 0.95em;
      color: #bbb;
      margin-bottom: 15px;
    }

    .page-vn586__guide-link {
      display: inline-block;
      background-color: var(--page-vn586-highlight-color);
      color: var(--page-vn586-button-text);
      padding: 8px 15px;
      border-radius: 5px;
      text-decoration: none;
      font-size: 0.9em;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-vn586__guide-link:hover {
      background-color: var(--page-vn586-button-hover-bg);
    }

    .page-vn586__download-app {
        background-color: var(--page-vn586-bg-color);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__app-download-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 30px;
      margin-top: 40px;
    }

    .page-vn586__app-image-wrapper {
        width: 100%;
        max-width: 400px;
        overflow: hidden;
        box-sizing: border-box;
        border-radius: 15px;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        border: 2px solid var(--page-vn586-highlight-color);
    }

    .page-vn586__app-screenshot {
        display: block;
        width: 100%;
        height: auto;
        object-fit: contain;
    }

    .page-vn586__app-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .page-vn586__app-button {
      display: flex;
      align-items: center;
      gap: 10px;
      background-color: var(--page-vn586-secondary-bg);
      color: var(--page-vn586-text-color);
      padding: 12px 25px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: 1px solid var(--page-vn586-border-color);
    }

    .page-vn586__app-button:hover {
      background-color: var(--page-vn586-highlight-color);
      color: var(--page-vn586-button-text);
      transform: translateY(-2px);
    }

    .page-vn586__app-button-icon {
        width: 30px; /* Display size, source image must be >= 200x200px */
        height: 30px;
        max-width: 100%;
        height: auto;
        object-fit: contain;
    }

    .page-vn586__faq-section {
        background-color: var(--page-vn586-secondary-bg);
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .page-vn586__faq-list {
      margin-top: 40px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-vn586__faq-item {
      background-color: var(--page-vn586-bg-color);
      border: 1px solid var(--page-vn586-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-vn586__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px;
      cursor: pointer;
      background-color: var(--page-vn586-secondary-bg);
      color: var(--page-vn586-text-color);
      font-size: 1.2em;
      font-weight: bold;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-vn586__faq-question:hover {
      background-color: #2a2a2a;
    }

    .page-vn586__faq-question-text {
        margin: 0;
        color: var(--page-vn586-highlight-color);
        pointer-events: none; /* Crucial for click event on parent */
    }

    .page-vn586__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      color: var(--page-vn586-highlight-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Crucial for click event on parent */
    }

    .page-vn586__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px; /* Initial padding */
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: #bbb;
    }

    .page-vn586__faq-item.active .page-vn586__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px !important; /* Desired padding when open */
      opacity: 1;
    }

    .page-vn586__faq-answer p {
      margin: 0;
      line-height: 1.8;
    }

    .page-vn586__cta-section {
        background-color: var(--page-vn586-bg-color);
        padding-top: 80px;
        padding-bottom: 100px;
        text-align: center;
    }

    .page-vn586__cta-button {
      display: inline-block;
      background-color: var(--page-vn586-button-bg);
      color: var(--page-vn586-button-text);
      padding: 18px 40px;
      border-radius: 10px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.3em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
      margin-top: 30px;
    }

    .page-vn586__cta-button:hover {
      background-color: var(--page-vn586-button-hover-bg);
      transform: translateY(-3px);
    }

    .page-vn586__floating-promo-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-vn586-promo-button-bg);
      color: #ffffff;
      padding: 15px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1