:root {
      --primary-color: #E74C3C; /* Đỏ rực */
      --secondary-color: #F1C40F; /* Vàng */
      --text-color: #ECF0F1; /* Trắng xám */
      --background-dark: #2C3E50; /* Xám đậm */
      --background-light: #34495E; /* Xám xanh */
      --accent-color: #2ECC71; /* Xanh lá */
      --border-color: #34495E;
      --button-hover-color: #C0392B;
    }

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

    .page-3vim {
      padding-top: 10px; /* Small decorative padding, assuming body handles main header offset */
      padding-bottom: 80px; /* Space for floating buttons */
      max-width: 1200px;
      margin: 0 auto;
      overflow-x: hidden; /* Prevent horizontal scroll */
    }

    .page-3vim__section {
      padding: 40px 20px;
      margin-bottom: 20px;
      background-color: var(--background-light);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .page-3vim__section--dark {
      background-color: var(--background-dark);
    }

    .page-3vim__header {
      text-align: center;
      margin-bottom: 30px;
    }

    .page-3vim__header h1,
    .page-3vim__header h2 {
      color: var(--secondary-color);
      margin-bottom: 15px;
      font-weight: bold;
    }

    .page-3vim__header h1 {
      font-size: 2.8em;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-3vim__header h2 {
      font-size: 2.2em;
      color: var(--primary-color);
    }

    .page-3vim__header p {
      font-size: 1.1em;
      max-width: 800px;
      margin: 0 auto;
      color: var(--text-color);
    }

    /* Hero Section */
    .page-3vim__hero-section {
      background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), var(--background-dark);
      padding: 60px 20px;
      text-align: center;
      position: relative;
      overflow: hidden;
      margin-bottom: 20px;
      border-radius: 8px;
    }

    .page-3vim__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: -1;
      opacity: 0.4;
    }

    .page-3vim__hero-content {
      position: relative;
      z-index: 1;
      color: #FFF;
    }

    .page-3vim__hero-content h1 {
      font-size: 3.5em;
      margin-bottom: 20px;
      color: var(--secondary-color);
      text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
    }

    .page-3vim__hero-content p {
      font-size: 1.3em;
      max-width: 700px;
      margin: 0 auto 30px auto;
      line-height: 1.5;
    }

    .page-3vim__button {
      display: inline-block;
      padding: 15px 30px;
      background-color: var(--primary-color);
      color: #fff;
      text-decoration: none;
      border-radius: 50px;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    }

    .page-3vim__button:hover {
      background-color: var(--button-hover-color);
      transform: translateY(-2px);
    }

    /* Floating Buttons */
    .page-3vim__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-3vim__floating-button {
      padding: 12px 25px;
      background-color: var(--primary-color);
      color: #fff;
      border-radius: 30px;
      font-weight: bold;
      font-size: 1em;
      text-align: center;
      cursor: pointer;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
    }

    .page-3vim__floating-button:hover {
      background-color: var(--button-hover-color);
      transform: scale(1.05);
    }

    /* Game Categories */
    .page-3vim__game-categories {
      text-align: center;
    }

    .page-3vim__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-3vim__game-card {
      background-color: var(--background-dark);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease;
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }

    .page-3vim__game-card:hover {
      transform: translateY(-8px);
    }

    .page-3vim__game-image-wrapper {
      width: 100%;
      height: 200px; /* Fixed height for consistent card size */
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .page-3vim__game-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-3vim__game-content {
      padding: 20px;
    }

    .page-3vim__game-content h3 {
      color: var(--secondary-color);
      font-size: 1.5em;
      margin-top: 0;
      margin-bottom: 10px;
    }

    .page-3vim__game-content p {
      font-size: 0.95em;
      color: var(--text-color);
    }

    /* Why Choose Us */
    .page-3vim__why-choose-us .page-3vim__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-3vim__feature-item {
      background-color: var(--background-dark);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: background-color 0.3s ease;
    }

    .page-3vim__feature-item:hover {
      background-color: var(--background-light);
    }

    .page-3vim__feature-item img {
      width: 200px; /* Min size for images */
      height: 150px;
      object-fit: contain;
      margin-bottom: 15px;
    }

    .page-3vim__feature-item h3 {
      color: var(--primary-color);
      font-size: 1.4em;
      margin-bottom: 10px;
    }

    .page-3vim__feature-item p {
      font-size: 1em;
      color: var(--text-color);
    }

    /* Promotions */
    .page-3vim__promotions-section .page-3vim__promo-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-3vim__promo-card {
      background-color: var(--background-dark);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .page-3vim__promo-card img {
      width: 100%;
      max-width: 300px;
      height: 200px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 20px;
    }

    .page-3vim__promo-card h3 {
      color: var(--secondary-color);
      font-size: 1.6em;
      margin-bottom: 10px;
    }

    .page-3vim__promo-card p {
      font-size: 1em;
      color: var(--text-color);
    }

    /* Testimonials */
    .page-3vim__testimonials .page-3vim__testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-3vim__testimonial-card {
      background-color: var(--background-dark);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      font-style: italic;
      position: relative;
    }

    .page-3vim__testimonial-card p {
      font-size: 1em;
      margin-bottom: 15px;
      color: var(--text-color);
    }

    .page-3vim__testimonial-author {
      font-weight: bold;
      color: var(--primary-color);
      text-align: right;
      font-style: normal;
      font-size: 0.95em;
    }

    /* FAQ Section */
    .page-3vim__faq-section {
      text-align: center;
    }

    .page-3vim__faq-container {
      max-width: 900px;
      margin: 30px auto 0 auto;
      text-align: left;
    }

    .page-3vim__faq-item {
      background-color: var(--background-dark);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-3vim__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: var(--background-light);
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-3vim__faq-question:hover {
      background-color: var(--background-dark);
    }

    .page-3vim__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      color: var(--secondary-color);
      pointer-events: none; /* Prevents text from blocking click event on parent */
    }

    .page-3vim__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--primary-color);
      pointer-events: none; /* Prevents icon from blocking click event on parent */
      transition: transform 0.3s ease;
    }

    .page-3vim__faq-item.active .page-3vim__faq-toggle {
      transform: rotate(45deg); /* Rotates the '+' to 'x' or '-' to 'x' */
    }

    .page-3vim__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      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(--text-color);
      font-size: 1em;
    }

    .page-3vim__faq-item.active .page-3vim__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* CTA Section */
    .page-3vim__cta-section {
      text-align: center;
      padding: 50px 20px;
      background-color: var(--primary-color);
      color: #fff;
      border-radius: 8px;
      margin-top: 40px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .page-3vim__cta-section h2 {
      color: #fff;
      font-size: 2.5em;
      margin-bottom: 20px;
    }

    .page-3vim__cta-section p {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-3vim__cta-section .page-3vim__button {
      background-color: var(--secondary-color);
      color: var(--background-dark);
    }

    .page-3vim__cta-section .page-3vim__button:hover {
      background-color: #e0b00e;
    }


    /* Responsive Design */
    @media (max-width: 768px) {
      .page-3vim {
        padding-left: 10px;
        padding-right: 10px;
      }

      .page-3vim__hero-content h1 {
        font-size: 2.5em;
      }

      .page-3vim__hero-content p {
        font-size: 1em;
      }

      .page-3vim__header h1 {
        font-size: 2.2em;
      }

      .page-3vim__header h2 {
        font-size: 1.8em;
      }

      .page-3vim__section {
        padding: 30px 15px;
      }

      .page-3vim__floating-buttons {
        bottom: 15px;
        right: 15px;
      }

      .page-3vim__floating-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }

      .page-3vim__game-grid,
      .page-3vim__features-grid,
      .page-3vim__promo-list,
      .page-3vim__testimonial-grid {
        grid-template-columns: 1fr; /* Stack cards vertically */
        gap: 20px;
      }

      .page-3vim__game-card,
      .page-3vim__feature-item,
      .page-3vim__promo-card,
      .page-3vim__testimonial-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-3vim__game-image-wrapper {
        height: 180px; /* Adjust image height for mobile */
      }

      .page-3vim__faq-question {
        padding: 12px 15px;
      }

      .page-3vim__faq-question h3 {
        font-size: 1.1em;
      }

      .page-3vim__faq-toggle {
        font-size: 1.5em;
      }

      .page-3vim__faq-answer {
        padding: 15px 15px !important;
      }

      .page-3vim__cta-section h2 {
        font-size: 2em;
      }

      .page-3vim__cta-section p {
        font-size: 1em;
      }

      /* Image responsive optimization */
      .page-3vim img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-3vim__game-image-wrapper,
      .page-3vim__promo-card img,
      .page-3vim__feature-item img {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important; /* Let height adjust naturally */
        box-sizing: border-box !important;
        overflow: hidden !important;
      }
    }

    @media (max-width: 480px) {
      .page-3vim__hero-content h1 {
        font-size: 2em;
      }
      .page-3vim__header h1 {
        font-size: 1.8em;
      }
      .page-3vim__header h2 {
        font-size: 1.5em;
      }
      .page-3vim__button {
        padding: 12px 25px;
        font-size: 1em;
      }
    }