:root {
      --page-ta28-primary-color: #e44d26; /* Cam đỏ */
      --page-ta28-secondary-color: #ff7f50; /* San hô */
      --page-ta28-accent-color: #ffd700; /* Vàng */
      --page-ta28-dark-bg: #1a1a1a;
      --page-ta28-light-bg: #ffffff;
      --page-ta28-text-color-dark: #333333;
      --page-ta28-text-color-light: #f0f0f0;
      --page-ta28-border-radius: 8px;
      --page-ta28-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    .page-ta28 {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-ta28-text-color-dark);
      background-color: #f5f5f5;
    }

    .page-ta28__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    /* Hero Section */
    .page-ta28__hero-section {
      position: relative;
      width: 100%;
      min-height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      background-color: var(--page-ta28-dark-bg);
      color: var(--page-ta28-text-color-light);
      overflow: hidden;
      padding-top: 10px; /* Required padding for fixed header */
    }

    .page-ta28__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 1;
      filter: brightness(0.6); /* Allowed for background dimming, not color change */
    }

    .page-ta28__hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      padding: 20px;
      background: rgba(0, 0, 0, 0.4);
      border-radius: var(--page-ta28-border-radius);
      box-shadow: var(--page-ta28-box-shadow);
    }

    .page-ta28__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-ta28-accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-ta28__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: #e0e0e0;
    }

    .page-ta28__button {
      display: inline-block;
      padding: 15px 30px;
      background-color: var(--page-ta28-primary-color);
      color: var(--page-ta28-text-color-light);
      border: none;
      border-radius: var(--page-ta28-border-radius);
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      transition: background-color 0.3s ease, transform 0.2s ease;
      text-decoration: none;
    }

    .page-ta28__button:hover {
      background-color: var(--page-ta28-secondary-color);
      transform: translateY(-2px);
    }

    /* Floating Login Button */
    .page-ta28__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-ta28-accent-color);
      color: var(--page-ta28-dark-bg);
      padding: 15px 25px;
      border-radius: 50px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
      font-size: 1.1em;
      font-weight: bold;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s ease;
      text-decoration: none;
      animation: page-ta28__pulse 2s infinite;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid var(--page-ta28-primary-color);
    }

    .page-ta28__floating-button:hover {
      background-color: #ffd94f;
      transform: scale(1.05);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }

    @keyframes page-ta28__pulse {
      0% {
        transform: scale(1);
      }
      50% {
        transform: scale(1.03);
      }
      100% {
        transform: scale(1);
      }
    }

    /* Section Styling */
    .page-ta28__section {
      padding: 60px 0;
      background-color: var(--page-ta28-light-bg);
      border-bottom: 1px solid #eee;
    }

    .page-ta28__section--dark {
      background-color: var(--page-ta28-dark-bg);
      color: var(--page-ta28-text-color-light);
    }

    .page-ta28__section-title {
      text-align: center;
      font-size: 2.2em;
      margin-bottom: 40px;
      color: var(--page-ta28-primary-color);
    }

    .page-ta28__section--dark .page-ta28__section-title {
      color: var(--page-ta28-accent-color);
    }

    /* Game Categories / Product Display */
    .page-ta28__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      padding: 20px;
    }

    .page-ta28__game-card {
      background-color: #fff;
      border-radius: var(--page-ta28-border-radius);
      box-shadow: var(--page-ta28-box-shadow);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      box-sizing: border-box; /* Required for list items */
    }

    .page-ta28__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    }

    .page-ta28__game-card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      max-width: 100%; /* Required for images */
      box-sizing: border-box; /* Required for image containers */
    }

    .page-ta28__game-card-content {
      padding: 20px;
      flex-grow: 1;
    }

    .page-ta28__game-card-title {
      font-size: 1.5em;
      margin-bottom: 10px;
      color: var(--page-ta28-primary-color);
    }

    .page-ta28__game-card-description {
      font-size: 0.95em;
      color: var(--page-ta28-text-color-dark);
      margin-bottom: 15px;
    }

    /* Features/Benefits List */
    .page-ta28__feature-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      padding: 20px;
    }

    .page-ta28__feature-item {
      background-color: #fff;
      padding: 30px;
      border-radius: var(--page-ta28-border-radius);
      box-shadow: var(--page-ta28-box-shadow);
      text-align: center;
      box-sizing: border-box; /* Required for list items */
    }

    .page-ta28__feature-image { /* Renamed from icon to image to clarify it's not a small icon */
      width: 200px; /* Enforced minimum size */
      height: auto;
      margin: 0 auto 20px auto;
      display: block;
      object-fit: contain;
      max-width: 100%; /* Required for images */
      box-sizing: border-box; /* Required for image containers */
    }

    .page-ta28__feature-title {
      font-size: 1.3em;
      color: var(--page-ta28-primary-color);
      margin-bottom: 10px;
    }

    .page-ta28__feature-description {
      font-size: 0.9em;
      color: var(--page-ta28-text-color-dark);
    }

    /* How-To Steps */
    .page-ta28__steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      padding: 20px;
    }

    .page-ta28__step-item {
      background-color: #fff;
      padding: 30px;
      border-radius: var(--page-ta28-border-radius);
      box-shadow: var(--page-ta28-box-shadow);
      text-align: center;
      box-sizing: border-box; /* Required for list items */
    }

    .page-ta28__step-number {
      display: inline-block;
      width: 50px;
      height: 50px;
      line-height: 50px;
      border-radius: 50%;
      background-color: var(--page-ta28-primary-color);
      color: var(--page-ta28-text-color-light);
      font-size: 1.8em;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .page-ta28__step-title {
      font-size: 1.4em;
      color: var(--page-ta28-primary-color);
      margin-bottom: 10px;
    }

    .page-ta28__step-description {
      font-size: 0.95em;
      color: var(--page-ta28-text-color-dark);
    }

    /* FAQ Section */
    .page-ta28__faq-section {
      background-color: var(--page-ta28-dark-bg);
      color: var(--page-ta28-text-color-light);
      padding: 60px 0;
    }

    .page-ta28__faq-list {
      max-width: 800px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .page-ta28__faq-item {
      background-color: #2a2a2a;
      border-radius: var(--page-ta28-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    .page-ta28__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: #3a3a3a;
      cursor: pointer;
      user-select: none;
      font-size: 1.15em;
      color: var(--page-ta28-accent-color);
      transition: background-color 0.3s ease;
    }

    .page-ta28__faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-ta28__faq-question h3 {
      margin: 0;
      font-size: 1.15em;
      pointer-events: none; /* Prevent h3 from interfering with click event */
      color: var(--page-ta28-accent-color); /* Ensure contrast */
    }

    .page-ta28__faq-toggle {
      font-size: 1.8em;
      line-height: 1;
      font-weight: bold;
      pointer-events: none; /* Prevent toggle from interfering with click event */
      transition: transform 0.3s ease;
      color: var(--page-ta28-primary-color); /* Ensure contrast */
    }

    .page-ta28__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;
      background-color: #2a2a2a;
      color: #e0e0e0;
    }

    .page-ta28__faq-item.active .page-ta28__faq-answer {
      max-height: 2000px !important; /* Sufficiently large height */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-ta28__faq-answer p {
      margin-bottom: 10px;
    }
    .page-ta28__faq-answer p:last-child {
      margin-bottom: 0;
    }


    /* Responsive Design */
    @media (max-width: 768px) {
      .page-ta28__container {
        padding: 15px;
      }

      .page-ta28__hero-title {
        font-size: 2em;
      }

      .page-ta28__hero-subtitle {
        font-size: 1em;
      }

      .page-ta28__section {
        padding: 40px 0;
      }

      .page-ta28__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
      }

      .page-ta28__game-grid,
      .page-ta28__feature-list,
      .page-ta28__steps-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
        padding: 0 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
      }

      .page-ta28__game-card,
      .page-ta28__feature-item,
      .page-ta28__step-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 20px !important;
      }
      .page-ta28__game-card-image,
      .page-ta28__feature-image {
        max-width: 100% !important;
        height: auto !important; /* Ensure images are responsive */
        box-sizing: border-box !important;
      }
      .page-ta28__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 1em;
      }

      .page-ta28__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }
      .page-ta28__faq-question h3 {
        font-size: 1em;
      }
      .page-ta28__faq-answer {
        padding: 0 20px;
      }
      .page-ta28__faq-item.active .page-ta28__faq-answer {
        padding: 15px 20px !important;
      }
      .page-ta28__faq-list {
        padding: 0 15px;
      }
      .page-ta28__faq-answer p {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }
    }

    /* Ensure text contrast for WCAG AA */
    .page-ta28 h1, .page-ta28 h2, .page-ta28 h3, .page-ta28 h4, .page-ta28 h5, .page-ta28 h6 {
        color: var(--page-ta28-primary-color);
    }
    .page-ta28__section--dark h1, .page-ta28__section--dark h2, .page-ta28__section--dark h3, .page-ta28__section--dark h4, .page-ta28__section--dark h5, .page-ta28__section--dark h6 {
        color: var(--page-ta28-accent-color);
    }
    .page-ta28 p, .page-ta28 li {
        color: var(--page-ta28-text-color-dark);
    }
    .page-ta28__section--dark p, .page-ta28__section--dark li {
        color: var(--page-ta28-text-color-light);
    }
    .page-ta28__button {
        color: var(--page-ta28-text-color-light);
    }
    .page-ta28__floating-button {
        color: var(--page-ta28-dark-bg);
    }
    .page-ta28__faq-question {
        color: var(--page-ta28-accent-color);
    }
    .page-ta28__faq-question h3 {
        color: var(--page-ta28-accent-color);
    }
    .page-ta28__faq-toggle {
        color: var(--page-ta28-primary-color);
    }
    .page-ta28__faq-answer {
        color: #e0e0e0;
    }