/* Tổng quan */
    .page-kkwin04 {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: #333;
      background-color: #f8f8f8;
      overflow-x: hidden;
    }

    .page-kkwin04__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    .page-kkwin04__section {
      background-color: #fff;
      margin-bottom: 30px;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    .page-kkwin04__section-title {
      color: #2c3e50;
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.5em;
      font-weight: 700;
      position: relative;
      padding-bottom: 15px;
    }

    .page-kkwin04__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: #e74c3c; /* Màu đỏ nổi bật */
      border-radius: 2px;
    }

    .page-kkwin04__text-center {
      text-align: center;
    }

    /* Hero Section */
    .page-kkwin04__hero-section {
      position: relative;
      padding-top: 10px; /* Essential for fixed header */
      margin-bottom: 30px;
      background-color: #2c3e50;
      color: #fff;
      text-align: center;
      padding-bottom: 40px;
      border-bottom-left-radius: 15px;
      border-bottom-right-radius: 15px;
    }

    .page-kkwin04__hero-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: 20px;
    }

    .page-kkwin04__hero-image {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
    }

    .page-kkwin04__hero-content {
      padding: 0 20px;
    }

    .page-kkwin04__hero-title {
      font-size: 3.2em;
      margin-bottom: 15px;
      color: #f1c40f; /* Màu vàng */
      line-height: 1.2;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-kkwin04__hero-subtitle {
      font-size: 1.4em;
      margin-bottom: 25px;
      color: #ecf0f1;
    }

    .page-kkwin04__hero-button {
      display: inline-block;
      background-color: #e74c3c; /* Màu đỏ */
      color: #fff;
      padding: 15px 35px;
      border-radius: 30px;
      text-decoration: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
      box-shadow: 0 6px 15px rgba(231, 76, 60, 0.4);
      border: none; /* Sử dụng button tag */
      cursor: pointer;
    }

    .page-kkwin04__hero-button:hover {
      background-color: #c0392b;
      transform: translateY(-3px);
    }

    /* Floating Login Button */
    .page-kkwin04__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #e74c3c; /* Màu đỏ nổi bật */
      color: #fff;
      padding: 15px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-size: 1.1em;
      font-weight: bold;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background-color 0.3s ease, transform 0.3s ease;
      animation: page-kkwin04__pulse 2s infinite;
      border: none; /* Sử dụng button tag */
      cursor: pointer;
    }

    .page-kkwin04__floating-button:hover {
      background-color: #c0392b;
      transform: scale(1.05);
    }

    @keyframes page-kkwin04__pulse {
      0% {
        transform: scale(1);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
      }
      50% {
        transform: scale(1.05);
        box-shadow: 0 12px 20px rgba(0, 0, 0, 0.4);
      }
      100% {
        transform: scale(1);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
      }
    }

    /* Game List */
    .page-kkwin04__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-kkwin04__game-item {
      background-color: #fdfdfd;
      border-radius: 10px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      padding: 20px;
    }

    .page-kkwin04__game-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
    }

    .page-kkwin04__game-icon-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
        margin-bottom: 15px;
    }

    .page-kkwin04__game-icon {
      width: 120px; /* Kích thước cố định cho icon game */
      height: 120px;
      object-fit: contain;
      margin: 0 auto 15px;
      display: block;
      border-radius: 50%;
      border: 3px solid #e74c3c;
      padding: 5px;
    }

    .page-kkwin04__game-title {
      font-size: 1.4em;
      color: #2c3e50;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-kkwin04__game-description {
      font-size: 0.95em;
      color: #555;
    }

    /* Promotions */
    .page-kkwin04__promo-card {
      background-color: #fef5e7; /* Màu nền nhẹ nhàng */
      border: 1px solid #f39c12; /* Viền màu cam */
      border-radius: 10px;
      padding: 25px;
      text-align: center;
      margin-top: 20px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    }

    .page-kkwin04__promo-card-title {
      font-size: 2em;
      color: #e67e22; /* Màu cam đậm */
      margin-bottom: 15px;
    }

    .page-kkwin04__promo-card-text {
      font-size: 1.1em;
      color: #555;
      margin-bottom: 20px;
    }

    .page-kkwin04__promo-button {
      display: inline-block;
      background-color: #f39c12; /* Màu cam */
      color: #fff;
      padding: 12px 30px;
      border-radius: 25px;
      text-decoration: none;
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none; /* Sử dụng button tag */
      cursor: pointer;
    }

    .page-kkwin04__promo-button:hover {
      background-color: #d35400;
    }

    /* How-to Guide */
    .page-kkwin04__guide-steps {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
    }

    .page-kkwin04__guide-step {
      flex: 1 1 calc(33% - 20px);
      background-color: #f8f9fa;
      border: 1px solid #ddd;
      border-radius: 8px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
      min-width: 280px;
      box-sizing: border-box;
    }

    .page-kkwin04__guide-step-number {
      font-size: 2.5em;
      color: #e74c3c;
      font-weight: bold;
      margin-bottom: 10px;
    }

    .page-kkwin04__guide-step-title {
      font-size: 1.3em;
      color: #2c3e50;
      margin-bottom: 15px;
      font-weight: 600;
    }

    .page-kkwin04__guide-step-text {
      color: #555;
      font-size: 1em;
    }

    /* Why Choose Us */
    .page-kkwin04__usp-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-kkwin04__usp-item {
      background-color: #e8f6f3; /* Màu xanh nhạt */
      border-left: 5px solid #2ecc71; /* Viền xanh lá */
      border-radius: 8px;
      padding: 25px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .page-kkwin04__usp-title {
      font-size: 1.4em;
      color: #27ae60;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .page-kkwin04__usp-text {
      color: #555;
      font-size: 1em;
    }

    /* FAQ */
    .page-kkwin04__faq-list {
      margin-top: 30px;
    }

    .page-kkwin04__faq-item {
      background-color: #fff;
      border: 1px solid #eee;
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-kkwin04__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #f5f5f5;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-kkwin04__faq-question:hover {
      background-color: #e0e0e0;
    }

    .page-kkwin04__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      color: #333;
      flex-grow: 1;
      pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-kkwin04__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: #e74c3c;
      margin-left: 15px;
      pointer-events: none; /* Prevent toggle icon from blocking click */
    }

    .page-kkwin04__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      background-color: #fdfdfd;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: #555;
      font-size: 1em;
    }

    .page-kkwin04__faq-item.active .page-kkwin04__faq-answer {
      max-height: 2000px !important; /* Use !important as required */
      padding: 20px !important; /* Use !important as required */
      opacity: 1;
    }

    .page-kkwin04__faq-item.active .page-kkwin04__faq-toggle {
      content: '−';
      color: #27ae60;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .page-kkwin04__section-title {
        font-size: 2em;
      }
      .page-kkwin04__hero-title {
        font-size: 2.5em;
      }
      .page-kkwin04__hero-subtitle {
        font-size: 1.2em;
      }
      .page-kkwin04__guide-step {
        flex: 1 1 calc(50% - 20px);
      }
    }

    @media (max-width: 768px) {
      .page-kkwin04__container {
        padding: 15px;
      }
      .page-kkwin04__section {
        padding: 20px;
      }
      .page-kkwin04__section-title {
        font-size: 1.8em;
        margin-bottom: 25px;
      }
      .page-kkwin04__hero-section {
        padding-top: 10px; /* Essential for fixed header on mobile */
        padding-bottom: 30px;
      }
      .page-kkwin04__hero-title {
        font-size: 2em;
      }
      .page-kkwin04__hero-subtitle {
        font-size: 1em;
      }
      .page-kkwin04__hero-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-kkwin04__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 0.95em;
      }
      .page-kkwin04__game-grid {
        grid-template-columns: 1fr;
      }
      .page-kkwin04__game-icon {
        width: 100px;
        height: 100px;
      }
      .page-kkwin04__game-title {
        font-size: 1.2em;
      }
      .page-kkwin04__promo-card-title {
        font-size: 1.6em;
      }
      .page-kkwin04__promo-card-text {
        font-size: 1em;
      }
      .page-kkwin04__guide-step {
        flex: 1 1 100%;
        padding: 20px;
      }
      .page-kkwin04__usp-list {
        grid-template-columns: 1fr;
      }
      .page-kkwin04__faq-question {
        padding: 12px 15px;
      }
      .page-kkwin04__faq-question h3 {
        font-size: 1.1em;
      }
      .page-kkwin04__faq-toggle {
        font-size: 1.5em;
      }
      .page-kkwin04__faq-answer {
        padding: 0 15px;
      }
      .page-kkwin04__faq-item.active .page-kkwin04__faq-answer {
        padding: 15px !important;
      }

      /* Image responsive optimization */
      .page-kkwin04 img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-kkwin04__hero-image-wrapper,
      .page-kkwin04__game-icon-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }