:root {
      --page-ku11net__primary-color: #FFD700; /* Vàng */
      --page-ku11net__secondary-color: #FFFFFF; /* Trắng */
      --page-ku11net__background-color: #000000; /* Đen */
      --page-ku11net__dark-gray: #1a1a1a;
      --page-ku11net__light-gray: #333333;
    }

    .page-ku11net {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-ku11net__background-color);
      color: var(--page-ku11net__secondary-color);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-ku11net__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    .page-ku11net__section {
      padding: 40px 0;
      text-align: center;
    }

    .page-ku11net__section-title {
      color: var(--page-ku11net__primary-color);
      font-size: 2.5em;
      margin-bottom: 30px;
      text-transform: uppercase;
      position: relative;
      padding-bottom: 10px;
    }

    .page-ku11net__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-ku11net__primary-color);
      border-radius: 2px;
    }

    .page-ku11net__text-center {
      text-align: center;
    }

    .page-ku11net__button {
      display: inline-block;
      background-color: var(--page-ku11net__primary-color);
      color: var(--page-ku11net__background-color);
      padding: 15px 30px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-ku11net__button:hover {
      background-color: #e6c200;
      transform: translateY(-2px);
    }

    /* Hero Section */
    .page-ku11net__hero-section {
      position: relative;
      width: 100%;
      min-height: 600px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      padding-top: 150px; /* Safe area for fixed header - Desktop */
      box-sizing: border-box;
      background-color: var(--page-ku11net__dark-gray);
    }

    .page-ku11net__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: contain; /* Ensure original ratio */
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      z-index: 1;
    }

    .page-ku11net__hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 20px;
      background: rgba(0, 0, 0, 0.6);
      border-radius: 10px;
      max-width: 90%;
    }

    .page-ku11net__hero-title {
      font-size: 3.5em;
      color: var(--page-ku11net__primary-color);
      margin-bottom: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-ku11net__hero-description {
      font-size: 1.3em;
      color: var(--page-ku11net__secondary-color);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Floating Login Button */
    .page-ku11net__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-ku11net__primary-color);
      color: var(--page-ku11net__background-color);
      padding: 12px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.3s ease;
      animation: page-ku11net__pulse 2s infinite;
    }

    .page-ku11net__floating-button:hover {
      background-color: #e6c200;
      transform: scale(1.05);
    }

    @keyframes page-ku11net__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    /* About Section */
    .page-ku11net__about-content {
      display: flex;
      flex-direction: column;
      gap: 30px;
      align-items: center;
    }

    .page-ku11net__about-text {
      flex: 1;
      text-align: left;
      padding-right: 20px;
    }

    .page-ku11net__about-image-wrapper {
      flex: 1;
      max-width: 600px;
      width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    }

    .page-ku11net__about-image {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 10px;
    }

    /* Game Categories */
    .page-ku11net__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku11net__game-card {
      background-color: var(--page-ku11net__dark-gray);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-ku11net__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.7);
    }

    .page-ku11net__game-card-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 200px; /* Fixed height for image area */
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: var(--page-ku11net__light-gray);
    }

    .page-ku11net__game-card-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .page-ku11net__game-card-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-ku11net__game-card-title {
      font-size: 1.5em;
      color: var(--page-ku11net__primary-color);
      margin-bottom: 10px;
    }

    .page-ku11net__game-card-title a {
      color: inherit;
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-ku11net__game-card-title a:hover {
      color: var(--page-ku11net__secondary-color);
    }

    .page-ku11net__game-card-description {
      font-size: 0.95em;
      color: var(--page-ku11net__secondary-color);
      margin-bottom: 15px;
    }

    /* Promotions Section */
    .page-ku11net__promo-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku11net__promo-card {
      background-color: var(--page-ku11net__dark-gray);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
      text-align: left;
      transition: transform 0.3s ease;
    }

    .page-ku11net__promo-card:hover {
      transform: translateY(-5px);
    }

    .page-ku11net__promo-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 220px;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: var(--page-ku11net__light-gray);
    }

    .page-ku11net__promo-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .page-ku11net__promo-content {
      padding: 20px;
    }

    .page-ku11net__promo-title {
      font-size: 1.4em;
      color: var(--page-ku11net__primary-color);
      margin-bottom: 10px;
    }

    .page-ku11net__promo-description {
      font-size: 0.95em;
      color: var(--page-ku11net__secondary-color);
      margin-bottom: 15px;
    }

    /* Providers Section */
    .page-ku11net__providers-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 40px;
      padding: 0 20px;
    }

    .page-ku11net__provider-item {
      background-color: var(--page-ku11net__dark-gray);
      border-radius: 8px;
      padding: 15px;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100px;
      transition: transform 0.3s ease;
    }

    .page-ku11net__provider-item:hover {
      transform: translateY(-3px) scale(1.05);
    }

    .page-ku11net__provider-logo {
      max-width: 100%;
      max-height: 70px;
      width: auto;
      height: auto;
      display: block;
      object-fit: contain;
    }

    /* Payment Section */
    .page-ku11net__payment-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 20px;
      margin-top: 40px;
      padding: 0 20px;
    }

    .page-ku11net__payment-item {
      background-color: var(--page-ku11net__dark-gray);
      border-radius: 8px;
      padding: 15px;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 120px;
      transition: transform 0.3s ease;
    }

    .page-ku11net__payment-item:hover {
      transform: translateY(-3px) scale(1.05);
    }

    .page-ku11net__payment-logo {
      max-width: 100%;
      max-height: 60px;
      width: auto;
      height: auto;
      display: block;
      object-fit: contain;
      margin-bottom: 10px;
    }

    .page-ku11net__payment-name {
      font-size: 1em;
      color: var(--page-ku11net__secondary-color);
      font-weight: bold;
    }

    /* FAQ Section */
    .page-ku11net__faq-list {
      margin-top: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      text-align: left;
    }

    .page-ku11net__faq-item {
      background-color: var(--page-ku11net__dark-gray);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
    }

    .page-ku11net__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      background-color: var(--page-ku11net__light-gray);
      color: var(--page-ku11net__primary-color);
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-ku11net__faq-question:hover {
      background-color: #444;
    }

    .page-ku11net__faq-question h3 {
      margin: 0;
      color: inherit;
      pointer-events: none; /* Prevent h3 from blocking click on parent */
    }

    .page-ku11net__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-ku11net__primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent */
    }

    .page-ku11net__faq-item.active .page-ku11net__faq-toggle {
      transform: rotate(45deg); /* Change + to X or - */
    }

    .page-ku11net__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(--page-ku11net__secondary-color);
    }

    .page-ku11net__faq-item.active .page-ku11net__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-ku11net__faq-answer p {
      margin: 0;
    }

    /* Why Choose Us Section */
    .page-ku11net__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku11net__feature-card {
      background-color: var(--page-ku11net__dark-gray);
      border-radius: 10px;
      padding: 30px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
      text-align: center;
      transition: transform 0.3s ease;
    }

    .page-ku11net__feature-card:hover {
      transform: translateY(-5px);
    }

    .page-ku11net__feature-icon {
      font-size: 3em;
      color: var(--page-ku11net__primary-color);
      margin-bottom: 15px;
    }

    .page-ku11net__feature-title {
      font-size: 1.5em;
      color: var(--page-ku11net__primary-color);
      margin-bottom: 10px;
    }

    .page-ku11net__feature-description {
      color: var(--page-ku11net__secondary-color);
    }

    /* Call to Action Section */
    .page-ku11net__cta-section {
      background-color: var(--page-ku11net__light-gray);
      padding: 60px 20px;
      text-align: center;
      margin-top: 60px;
    }

    .page-ku11net__cta-title {
      color: var(--page-ku11net__primary-color);
      font-size: 2.8em;
      margin-bottom: 30px;
    }

    /* Responsive Design */
    @media (max-width: 992px) {
      .page-ku11net__hero-title {
        font-size: 2.8em;
      }
      .page-ku11net__hero-description {
        font-size: 1.1em;
      }
      .page-ku11net__section-title {
        font-size: 2em;
      }
      .page-ku11net__about-text {
        padding-right: 0;
      }
      .page-ku11net__about-content {
        flex-direction: column;
      }
    }

    @media (max-width: 768px) {
      .page-ku11net__hero-section {
        min-height: 450px;
        padding-top: 100px; /* Mobile safe area */
      }
      .page-ku11net__hero-title {
        font-size: 2.2em;
      }
      .page-ku11net__hero-description {
        font-size: 1em;
      }
      .page-ku11net__floating-button {
        padding: 10px 20px;
        font-size: 1em;
        bottom: 15px;
        right: 15px;
      }
      .page-ku11net__section-title {
        font-size: 1.8em;
      }
      .page-ku11net__game-card-title {
        font-size: 1.3em;
      }
      .page-ku11net__promo-title {
        font-size: 1.2em;
      }
      .page-ku11net__faq-question {
        padding: 15px 20px;
        font-size: 1.1em;
      }
      .page-ku11net__faq-answer {
        padding: 0 20px;
      }
      .page-ku11net__faq-item.active .page-ku11net__faq-answer {
        padding: 15px 20px !important;
      }
      .page-ku11net__cta-title {
        font-size: 2em;
      }
      .page-ku11net__providers-grid,
      .page-ku11net__payment-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }
      /* Image responsive optimization for mobile */
      .page-ku11net img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-ku11net__hero-image,
      .page-ku11net__about-image,
      .page-ku11net__game-card-image,
      .page-ku11net__promo-image,
      .page-ku11net__provider-logo,
      .page-ku11net__payment-logo {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-ku11net__about-image-wrapper,
      .page-ku11net__game-card-image-wrapper,
      .page-ku11net__promo-image-wrapper,
      .page-ku11net__provider-item,
      .page-ku11net__payment-item {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-ku11net__hero-title {
        font-size: 1.8em;
      }
      .page-ku11net__hero-description {
        font-size: 0.9em;
      }
      .page-ku11net__button {
        padding: 12px 20px;
        font-size: 1em;
      }
      .page-ku11net__section-title {
        font-size: 1.5em;
      }
      .page-ku11net__game-grid {
        grid-template-columns: 1fr;
      }
      .page-ku11net__promo-grid {
        grid-template-columns: 1fr;
      }
      .page-ku11net__faq-question {
        font-size: 1em;
      }
      .page-ku11net__cta-title {
        font-size: 1.8em;
      }
    }