:root {
      --page-kwin-primary-color: #f0a500; /* Màu vàng cam */
      --page-kwin-secondary-color: #2c3e50; /* Màu xanh đậm */
      --page-kwin-text-light: #ecf0f1; /* Màu chữ sáng */
      --page-kwin-text-dark: #34495e; /* Màu chữ tối */
      --page-kwin-bg-dark: #1a1a1a; /* Nền tối */
      --page-kwin-bg-medium: #2a2a2a; /* Nền trung bình */
      --page-kwin-bg-light: #3a3a3a; /* Nền sáng hơn */
      --page-kwin-border-color: #4a4a4a; /* Màu viền */
      --page-kwin-transition-speed: 0.3s;
    }

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

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

    .page-kwin__section-title {
      font-size: 2.5em;
      color: var(--page-kwin-primary-color);
      text-align: center;
      margin-bottom: 40px;
      padding-top: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-kwin__section-title strong {
      color: var(--page-kwin-text-light);
    }

    /* Hero Section */
    .page-kwin__hero-section {
      position: relative;
      width: 100%;
      background-color: var(--page-kwin-bg-medium);
      padding-top: 120px; /* Để tránh header cố định */
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-kwin__hero-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain; /* Đảm bảo ảnh không bị kéo dãn */
      margin-bottom: 20px;
      max-width: 100%; /* Đảm bảo hình ảnh không vượt quá chiều rộng của container */
    }

    .page-kwin__hero-content {
      position: relative;
      z-index: 1;
      padding: 0 20px 40px;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-kwin__hero-title {
      font-size: 3.2em;
      color: var(--page-kwin-primary-color);
      margin-bottom: 15px;
      line-height: 1.2;
      text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
    }

    .page-kwin__hero-description {
      font-size: 1.3em;
      color: var(--page-kwin-text-light);
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-kwin__hero-cta-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .page-kwin__hero-button {
      background-color: var(--page-kwin-primary-color);
      color: var(--page-kwin-bg-dark);
      padding: 15px 30px;
      border: none;
      border-radius: 8px;
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      transition: background-color var(--page-kwin-transition-speed) ease, transform var(--page-kwin-transition-speed) ease;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-kwin__hero-button:hover {
      background-color: #ffb733;
      transform: translateY(-3px);
    }

    /* Floating Login Button */
    .page-kwin__floating-login-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: #e74c3c; /* Màu đỏ nổi bật cho khuyến mãi */
      color: white;
      padding: 15px 25px;
      border-radius: 50px;
      text-align: center;
      font-size: 1.1em;
      font-weight: bold;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
      animation: page-kwin__pulse 2s infinite;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-kwin__floating-login-button:hover {
      background-color: #c0392b;
      transform: scale(1.05);
      animation: none;
    }

    @keyframes page-kwin__pulse {
      0% { transform: scale(1); box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4); }
      50% { transform: scale(1.05); box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6); }
      100% { transform: scale(1); box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4); }
    }

    /* Game Categories Section */
    .page-kwin__game-categories-section {
      padding: 60px 0;
      background-color: var(--page-kwin-bg-dark);
    }

    .page-kwin__category-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 25px;
      justify-content: center;
      margin-top: 40px;
    }

    .page-kwin__category-item {
      background-color: var(--page-kwin-bg-medium);
      border-radius: 12px;
      overflow: hidden;
      text-align: center;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
      transition: transform var(--page-kwin-transition-speed) ease, box-shadow var(--page-kwin-transition-speed) ease;
      text-decoration: none;
      color: var(--page-kwin-text-light);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 15px;
    }

    .page-kwin__category-item:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }

    .page-kwin__category-image {
      width: 100%;
      height: 150px; /* Fixed height for category images */
      object-fit: cover;
      display: block;
      border-bottom: 2px solid var(--page-kwin-primary-color);
      max-width: 100%;
    }

    .page-kwin__category-title {
      font-size: 1.2em;
      font-weight: bold;
      margin-top: 15px;
      color: var(--page-kwin-primary-color);
      padding: 0 10px;
    }

    /* About Section */
    .page-kwin__about-section {
      padding: 60px 0;
      background-color: var(--page-kwin-bg-medium);
    }

    .page-kwin__about-content {
      display: flex;
      flex-direction: column;
      gap: 30px;
      align-items: center;
    }

    .page-kwin__about-text {
      font-size: 1.1em;
      color: var(--page-kwin-text-light);
      text-align: center;
      max-width: 800px;
      margin: 0 auto;
    }

    .page-kwin__about-item-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      width: 100%;
      list-style: none;
      padding: 0;
      margin-top: 30px;
    }

    .page-kwin__about-item {
      background-color: var(--page-kwin-bg-light);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: center;
      border-left: 5px solid var(--page-kwin-primary-color);
    }

    .page-kwin__about-item h3 {
      color: var(--page-kwin-primary-color);
      font-size: 1.5em;
      margin-top: 0;
      margin-bottom: 15px;
    }

    .page-kwin__about-item p {
      color: var(--page-kwin-text-light);
      font-size: 0.95em;
    }

    /* Game Providers Section */
    .page-kwin__providers-section {
      padding: 60px 0;
      background-color: var(--page-kwin-bg-dark);
    }

    .page-kwin__providers-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); /* Smaller minmax for logos */
      gap: 20px;
      justify-items: center;
      align-items: center;
      margin-top: 40px;
    }

    .page-kwin__provider-logo {
      width: 100%;
      height: auto;
      max-width: 150px; /* Max width for logos */
      object-fit: contain;
      filter: grayscale(80%);
      transition: filter 0.3s ease;
      display: block;
      max-height: 80px; /* Ensure logos are not too tall */
    }

    .page-kwin__provider-logo:hover {
      filter: grayscale(0%);
    }

    /* FAQ Section */
    .page-kwin__faq-section {
      padding: 60px 0;
      background-color: var(--page-kwin-bg-medium);
    }

    .page-kwin__faq-list {
      max-width: 800px;
      margin: 0 auto;
      list-style: none;
      padding: 0;
    }

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

    .page-kwin__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      background-color: var(--page-kwin-bg-light);
      color: var(--page-kwin-primary-color);
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color var(--page-kwin-transition-speed) ease;
    }

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

    .page-kwin__faq-question h3 {
      margin: 0;
      font-size: 1em; /* Adjust to fit the parent font-size */
      color: var(--page-kwin-primary-color);
      pointer-events: none; /* Prevents text selection from interfering with click */
    }

    .page-kwin__faq-toggle {
      font-size: 1.8em;
      line-height: 1;
      margin-left: 15px;
      pointer-events: none; /* Prevents toggle icon from interfering with click */
      transition: transform var(--page-kwin-transition-speed) ease;
      color: var(--page-kwin-text-light);
    }

    .page-kwin__faq-item.active .page-kwin__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar effect */
      content: "−"; /* Visually changed by JS */
    }

    .page-kwin__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px; /* Initial padding, will be overridden */
      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(--page-kwin-text-light);
      background-color: #343434;
      border-top: 1px solid var(--page-kwin-border-color);
    }

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

    /* CTA Section */
    .page-kwin__cta-section {
      padding: 80px 0;
      background-color: var(--page-kwin-bg-dark);
      text-align: center;
    }

    .page-kwin__cta-content {
      max-width: 800px;
      margin: 0 auto;
    }

    .page-kwin__cta-content h2 {
      font-size: 2.8em;
      color: var(--page-kwin-primary-color);
      margin-bottom: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-kwin__cta-content p {
      font-size: 1.2em;
      color: var(--page-kwin-text-light);
      margin-bottom: 40px;
    }

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

    .page-kwin__cta-button {
      background-color: var(--page-kwin-primary-color);
      color: var(--page-kwin-bg-dark);
      padding: 15px 35px;
      border: none;
      border-radius: 8px;
      font-size: 1.2em;
      font-weight: bold;
      cursor: pointer;
      transition: background-color var(--page-kwin-transition-speed) ease, transform var(--page-kwin-transition-speed) ease;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-kwin__cta-button:hover {
      background-color: #ffb733;
      transform: translateY(-3px);
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .page-kwin__hero-title {
        font-size: 2.8em;
      }
      .page-kwin__hero-description {
        font-size: 1.1em;
      }
      .page-kwin__section-title {
        font-size: 2.2em;
      }
      .page-kwin__category-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      }
      .page-kwin__about-item-list {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      }
      .page-kwin__providers-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
      }
    }

    @media (max-width: 768px) {
      .page-kwin__container {
        padding: 15px;
      }
      .page-kwin__hero-section {
        padding-top: 100px; /* Điều chỉnh cho mobile header */
      }
      .page-kwin__hero-title {
        font-size: 2.2em;
      }
      .page-kwin__hero-description {
        font-size: 1em;
      }
      .page-kwin__hero-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-kwin__section-title {
        font-size: 1.8em;
      }
      .page-kwin__category-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .page-kwin__about-item-list {
        grid-template-columns: 1fr;
      }
      .page-kwin__floating-login-button {
        bottom: 15px;
        left: 50%;
        transform: translateX(-50%);
        right: auto;
        padding: 12px 20px;
        font-size: 1em;
        width: calc(100% - 30px);
        max-width: 300px;
      }
      .page-kwin__faq-question {
        font-size: 1.1em;
        padding: 18px 20px;
      }
      .page-kwin__faq-answer {
        padding: 0 20px;
      }
      .page-kwin__faq-item.active .page-kwin__faq-answer {
        padding: 15px 20px !important;
      }
      .page-kwin__cta-content h2 {
        font-size: 2.2em;
      }
      .page-kwin__cta-content p {
        font-size: 1.1em;
      }
      .page-kwin__cta-button {
        padding: 12px 25px;
        font-size: 1.1em;
      }

      /* Image responsive styles */
      .page-kwin img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-kwin__category-image {
        max-width: 100% !important;
        height: 120px !important; /* Adjust height for mobile */
      }
      .page-kwin__provider-logo {
        max-width: 100% !important;
        height: auto !important;
        max-height: 60px !important;
      }
    }

    @media (max-width: 480px) {
      .page-kwin__hero-title {
        font-size: 1.8em;
      }
      .page-kwin__hero-description {
        font-size: 0.9em;
      }
      .page-kwin__hero-cta-group {
        flex-direction: column;
        gap: 15px;
      }
      .page-kwin__section-title {
        font-size: 1.6em;
      }
      .page-kwin__category-grid {
        grid-template-columns: 1fr;
      }
      .page-kwin__category-image {
        height: 100px !important;
      }
      .page-kwin__cta-buttons {
        flex-direction: column;
        gap: 15px;
      }
    }