:root {
          --primary-color: #fdd835; /* Vàng */
          --secondary-color: #ffffff; /* Trắng */
          --background-color: #000000; /* Đen */
          --dark-text-color: #333333;
          --light-text-color: #ffffff;
          --button-bg: var(--primary-color);
          --button-text: var(--dark-text-color);
          --button-hover-bg: #ffe082;
          --border-radius: 8px;
          --container-max-width: 1200px;
      }

      body {
          font-family: 'Arial', sans-serif;
          margin: 0;
          padding: 0;
          background-color: var(--background-color);
          color: var(--light-text-color);
          line-height: 1.6;
      }

      .page-nhap {
          background-color: var(--background-color);
          color: var(--light-text-color);
          padding-bottom: 80px; /* Space for floating CTA */
      }

      .page-nhap__section {
          padding: 40px 20px;
          max-width: var(--container-max-width);
          margin: 0 auto;
          box-sizing: border-box;
      }

      .page-nhap__hero-section {
          padding-top: 10px; /* Small top padding, body handles header offset */
          text-align: center;
          display: flex;
          flex-direction: column;
          align-items: center;
          justify-content: center;
          position: relative;
          overflow: hidden;
          margin-bottom: 40px;
      }

      .page-nhap__hero-image {
          width: 100%;
          max-width: 100%;
          height: auto;
          display: block;
          object-fit: cover;
          border-radius: var(--border-radius);
          margin-bottom: 20px;
      }

      .page-nhap__hero-content {
          max-width: 800px;
          z-index: 1;
          padding: 0 20px;
      }

      .page-nhap__main-title {
          font-size: clamp(2em, 5vw, 3.2em);
          font-weight: 700;
          color: var(--primary-color);
          margin-bottom: 15px;
          line-height: 1.2;
          text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
      }

      .page-nhap__description {
          font-size: clamp(1em, 2.5vw, 1.2em);
          color: var(--secondary-color);
          margin-bottom: 30px;
          max-width: 700px;
          margin-left: auto;
          margin-right: auto;
      }

      .page-nhap__cta-button {
          display: inline-block;
          background-color: var(--button-bg);
          color: var(--button-text);
          padding: 14px 28px;
          border-radius: 50px;
          text-decoration: none;
          font-weight: 700;
          font-size: 1.1em;
          transition: background-color 0.3s ease, transform 0.2s ease;
          box-shadow: 0 4px 15px rgba(0,0,0,0.3);
          border: none;
          cursor: pointer;
      }

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

      .page-nhap__floating-cta {
          position: fixed;
          bottom: 20px;
          left: 50%;
          transform: translateX(-50%);
          z-index: 1000;
          background-color: var(--primary-color);
          color: var(--dark-text-color);
          padding: 12px 25px;
          border-radius: 50px;
          text-decoration: none;
          font-weight: 700;
          font-size: 1.05em;
          box-shadow: 0 6px 20px rgba(0,0,0,0.4);
          transition: background-color 0.3s ease, transform 0.3s ease;
          white-space: nowrap;
          word-wrap: break-word;
          max-width: 90%;
          box-sizing: border-box;
          text-align: center;
      }

      .page-nhap__floating-cta:hover {
          background-color: var(--button-hover-bg);
          transform: translateX(-50%) translateY(-3px);
      }

      .page-nhap__game-categories h2,
      .page-nhap__advantages-section h2,
      .page-nhap__promotions-section h2,
      .page-nhap__providers-section h2,
      .page-nhap__app-download-section h2,
      .page-nhap__guides-section h2,
      .page-nhap__faq-section h2,
      .page-nhap__social-media h2 {
          text-align: center;
          color: var(--primary-color);
          font-size: clamp(1.8em, 4vw, 2.5em);
          margin-bottom: 30px;
          text-shadow: 1px 1px 3px rgba(0,0,0,0.4);
      }

      .page-nhap__game-grid {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
          gap: 25px;
          margin-top: 30px;
      }

      .page-nhap__game-card {
          background-color: #1a1a1a;
          border-radius: var(--border-radius);
          overflow: hidden;
          box-shadow: 0 5px 20px rgba(0,0,0,0.3);
          text-align: center;
          transition: transform 0.3s ease, box-shadow 0.3s ease;
          border: 1px solid #333;
      }

      .page-nhap__game-card:hover {
          transform: translateY(-5px);
          box-shadow: 0 8px 25px rgba(0,0,0,0.5);
      }

      .page-nhap__game-image {
          width: 100%;
          height: 180px;
          object-fit: cover;
          display: block;
      }

      .page-nhap__game-info {
          padding: 20px;
      }

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

      .page-nhap__game-description {
          font-size: 0.95em;
          color: var(--secondary-color);
          margin-bottom: 20px;
      }

      .page-nhap__advantage-list {
          list-style: none;
          padding: 0;
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
          gap: 20px;
          margin-top: 30px;
      }

      .page-nhap__advantage-item {
          background-color: #1a1a1a;
          padding: 25px;
          border-radius: var(--border-radius);
          box-shadow: 0 3px 10px rgba(0,0,0,0.2);
          text-align: center;
          border: 1px solid #333;
      }

      .page-nhap__advantage-item h3 {
          color: var(--primary-color);
          font-size: 1.3em;
          margin-bottom: 10px;
      }

      .page-nhap__advantage-item p {
          color: var(--secondary-color);
          font-size: 0.95em;
      }

      .page-nhap__promotion-grid {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
          gap: 25px;
          margin-top: 30px;
      }

      .page-nhap__promotion-card {
          background-color: #1a1a1a;
          border-radius: var(--border-radius);
          overflow: hidden;
          box-shadow: 0 5px 20px rgba(0,0,0,0.3);
          transition: transform 0.3s ease, box-shadow 0.3s ease;
          border: 1px solid #333;
      }

      .page-nhap__promotion-card:hover {
          transform: translateY(-5px);
          box-shadow: 0 8px 25px rgba(0,0,0,0.5);
      }

      .page-nhap__promotion-image {
          width: 100%;
          height: 200px;
          object-fit: cover;
          display: block;
      }

      .page-nhap__promotion-info {
          padding: 20px;
      }

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

      .page-nhap__promotion-description {
          font-size: 0.95em;
          color: var(--secondary-color);
          margin-bottom: 20px;
      }

      .page-nhap__provider-grid {
          display: flex;
          flex-wrap: wrap;
          justify-content: center;
          align-items: center;
          gap: 30px;
          margin-top: 30px;
      }

      .page-nhap__provider-logo {
          height: 80px; /* gamelogo type does not have width/height in placeholder */
          width: auto;
          object-fit: contain;
          filter: grayscale(80%) brightness(120%);
          transition: filter 0.3s ease;
      }

      .page-nhap__provider-logo:hover {
          filter: grayscale(0%) brightness(100%);
      }

      .page-nhap__app-buttons {
          display: flex;
          justify-content: center;
          gap: 20px;
          margin-top: 30px;
          flex-wrap: wrap;
      }

      .page-nhap__guide-grid {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
          gap: 25px;
          margin-top: 30px;
      }

      .page-nhap__guide-card {
          background-color: #1a1a1a;
          border-radius: var(--border-radius);
          overflow: hidden;
          box-shadow: 0 5px 20px rgba(0,0,0,0.3);
          transition: transform 0.3s ease, box-shadow 0.3s ease;
          border: 1px solid #333;
      }

      .page-nhap__guide-card:hover {
          transform: translateY(-5px);
          box-shadow: 0 8px 25px rgba(0,0,0,0.5);
      }

      .page-nhap__guide-image {
          width: 100%;
          height: 180px;
          object-fit: cover;
          display: block;
      }

      .page-nhap__guide-info {
          padding: 20px;
      }

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

      .page-nhap__guide-description {
          font-size: 0.95em;
          color: var(--secondary-color);
          margin-bottom: 20px;
      }

      .page-nhap__faq-list {
          margin-top: 30px;
          max-width: 800px;
          margin-left: auto;
          margin-right: auto;
      }

      .page-nhap__faq-item {
          background-color: #1a1a1a;
          border-radius: var(--border-radius);
          margin-bottom: 15px;
          overflow: hidden;
          box-shadow: 0 2px 10px rgba(0,0,0,0.2);
          border: 1px solid #333;
      }

      .page-nhap__faq-question {
          display: flex;
          justify-content: space-between;
          align-items: center;
          padding: 18px 20px;
          background-color: #222;
          cursor: pointer;
          font-weight: 700;
          font-size: 1.1em;
          color: var(--secondary-color);
          transition: background-color 0.3s ease;
          user-select: none;
      }

      .page-nhap__faq-question:hover {
          background-color: #333;
      }

      .page-nhap__faq-question h3 {
          margin: 0;
          color: inherit;
          pointer-events: none; /* Prevent h3 from blocking click */
          flex-grow: 1;
      }

      .page-nhap__faq-toggle {
          font-size: 1.5em;
          line-height: 1;
          color: var(--primary-color);
          margin-left: 15px;
          pointer-events: none; /* Prevent toggle from blocking click */
      }

      .page-nhap__faq-answer {
          max-height: 0;
          overflow: hidden;
          padding: 0 20px;
          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(--secondary-color);
          font-size: 0.95em;
      }

      .page-nhap__faq-item.active .page-nhap__faq-answer {
          max-height: 2000px !important;
          padding: 20px !important;
          opacity: 1;
      }

      .page-nhap__social-grid {
          display: flex;
          flex-wrap: wrap;
          justify-content: center;
          gap: 25px;
          margin-top: 30px;
      }

      .page-nhap__social-link {
          display: flex;
          align-items: center;
          justify-content: center;
          width: 50px;
          height: 50px;
          border-radius: 50%;
          background-color: #222;
          color: var(--primary-color);
          font-size: 1.8em;
          text-decoration: none;
          transition: background-color 0.3s ease, transform 0.2s ease;
          box-shadow: 0 2px 8px rgba(0,0,0,0.2);
      }

      .page-nhap__social-link:hover {
          background-color: var(--primary-color);
          color: var(--dark-text-color);
          transform: translateY(-3px);
      }

      /* General image responsiveness */
      .page-nhap img {
          max-width: 100%;
          height: auto;
          display: block;
      }

      /* Mobile responsiveness */
      @media (max-width: 768px) {
          .page-nhap__section {
              padding: 20px 15px;
          }

          .page-nhap__hero-section {
              padding: 20px 15px;
              padding-top: 10px !important;
          }

          .page-nhap__hero-image {
              height: 200px;
          }

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

          .page-nhap__description {
              font-size: 0.95em;
          }

          .page-nhap__cta-button {
              padding: 12px 20px;
              font-size: 1em;
          }

          .page-nhap__floating-cta {
              font-size: 0.95em;
              padding: 10px 18px;
              max-width: 90% !important;
              width: 100% !important;
              box-sizing: border-box !important;
          }

          .page-nhap__game-grid,
          .page-nhap__advantage-list,
          .page-nhap__promotion-grid,
          .page-nhap__guide-grid {
              grid-template-columns: 1fr;
              gap: 20px;
          }

          .page-nhap__game-image,
          .page-nhap__promotion-image,
          .page-nhap__guide-image {
              height: 150px;
          }

          .page-nhap__game-card,
          .page-nhap__advantage-item,
          .page-nhap__promotion-card,
          .page-nhap__guide-card {
              width: 100% !important;
              max-width: 100% !important;
              box-sizing: border-box !important;
          }

          .page-nhap__app-buttons {
              flex-direction: column;
              gap: 15px;
          }

          .page-nhap__app-buttons .page-nhap__cta-button {
              width: 100% !important;
              max-width: 100% !important;
              box-sizing: border-box !important;
              padding-left: 15px;
              padding-right: 15px;
          }

          .page-nhap__faq-question,
          .page-nhap__faq-answer {
              padding: 15px;
          }

          .page-nhap__faq-item.active .page-nhap__faq-answer {
              padding: 15px !important;
          }

          .page-nhap img {
            max-width: 100% !important;
            width: 100% !important;
            height: auto !important;
          }
          .page-nhap__video-section,
          .page-nhap__video-container,
          .page-nhap__video-wrapper,
          .page-nhap__game-categories,
          .page-nhap__advantages-section,
          .page-nhap__promotions-section,
          .page-nhap__providers-section,
          .page-nhap__app-download-section,
          .page-nhap__guides-section,
          .page-nhap__faq-section,
          .page-nhap__social-media {
            max-width: 100% !important;
            width: 100% !important;
            box-sizing: border-box !important;
            padding-left: 15px;
            padding-right: 15px;
            overflow-x: hidden;
          }
          .page-nhap__game-info .page-nhap__cta-button,
          .page-nhap__promotion-info .page-nhap__cta-button,
          .page-nhap__guide-info .page-nhap__cta-button {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
          }

          .page-nhap p, .page-nhap li {
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
          }
          .page-nhap__advantage-item h3, .page-nhap__game-title, .page-nhap__promotion-title, .page-nhap__guide-title {
            word-break: break-word !important;
          }
      }