:root {
      --page-o0k9-primary-color: #e00000; /* Đỏ mạnh */
      --page-o0k9-secondary-color: #ffcc00; /* Vàng */
      --page-o0k9-dark-bg: #1a1a1a; /* Nền tối */
      --page-o0k9-light-bg: #2a2a2a; /* Nền sáng hơn */
      --page-o0k9-text-color: #ffffff; /* Trắng */
      --page-o0k9-text-light-color: #cccccc; /* Xám nhạt */
      --page-o0k9-border-color: #3a3a3a; /* Màu viền */
      --page-o0k9-button-hover-color: #ff4d4d; /* Đỏ khi hover */
    }

    /* Base styles for the page content */
    .page-o0k9 {
      font-family: 'Arial', sans-serif;
      color: var(--page-o0k9-text-color);
      background-color: var(--page-o0k9-dark-bg);
      line-height: 1.6;
      overflow-x: hidden; /* Prevent horizontal scroll due to floating buttons */
    }

    .page-o0k9__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    /* Hero Section */
    .page-o0k9__hero-section {
      text-align: center;
      padding: 10px 20px 60px; /* Small top padding, more bottom for content */
      background-color: #0d0d0d;
      position: relative;
      overflow: hidden;
    }

    .page-o0k9__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      opacity: 0.3; /* Subtle background */
    }

    .page-o0k9__hero-content {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 400px; /* Ensure content area is visible */
    }

    .page-o0k9__hero-title {
      font-size: 2.8em;
      color: var(--page-o0k9-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
      text-transform: uppercase;
      font-weight: bold;
    }

    .page-o0k9__hero-subtitle {
      font-size: 1.3em;
      color: var(--page-o0k9-secondary-color);
      margin-bottom: 30px;
      max-width: 800px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    /* Floating Register/Login Buttons */
    .page-o0k9__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .page-o0k9__floating-button {
      background-color: var(--page-o0k9-primary-color);
      color: var(--page-o0k9-text-color);
      border: none;
      padding: 12px 25px;
      border-radius: 30px;
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      text-decoration: none; /* Ensure no underline for button-like elements */
      text-align: center;
      display: block; /* Make it block to take full width of container */
      min-width: 120px; /* Ensure consistent width */
    }

    .page-o0k9__floating-button:hover {
      background-color: var(--page-o0k9-button-hover-color);
      transform: translateY(-2px);
    }

    .page-o0k9__floating-button--login {
      background-color: var(--page-o0k9-secondary-color);
      color: var(--page-o0k9-dark-bg);
    }

    .page-o0k9__floating-button--login:hover {
      background-color: #ffdb4d;
    }

    /* General Section Styles */
    .page-o0k9__section {
      padding: 60px 20px;
      background-color: var(--page-o0k9-dark-bg);
      border-bottom: 1px solid var(--page-o0k9-border-color);
      text-align: center;
    }

    .page-o0k9__section--light {
      background-color: var(--page-o0k9-light-bg);
    }

    .page-o0k9__section-title {
      font-size: 2.2em;
      color: var(--page-o0k9-primary-color);
      margin-bottom: 40px;
      text-transform: uppercase;
      font-weight: bold;
      position: relative;
      padding-bottom: 10px;
    }

    .page-o0k9__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-o0k9-secondary-color);
      border-radius: 2px;
    }
    
    .page-o0k9__section-subtitle {
        font-size: 1.6em;
        color: var(--page-o0k9-secondary-color);
        margin-top: 50px;
        margin-bottom: 30px;
        font-weight: bold;
    }

    .page-o0k9__section-description {
      font-size: 1.1em;
      color: var(--page-o0k9-text-light-color);
      max-width: 900px;
      margin: 0 auto 50px;
    }

    /* Product Showcase */
    .page-o0k9__product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-o0k9__product-card {
      background-color: var(--page-o0k9-light-bg);
      border-radius: 15px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: left;
      border: 1px solid var(--page-o0k9-border-color);
      display: flex;
      flex-direction: column;
      height: 100%; /* Ensure cards are same height */
    }

    .page-o0k9__product-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
    }

    .page-o0k9__product-image-wrapper {
        width: 100%;
        height: 200px; /* Fixed height for images */
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: #000;
    }

    .page-o0k9__product-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }
    
    .page-o0k9__product-card:hover .page-o0k9__product-image {
        transform: scale(1.05);
    }

    .page-o0k9__product-content {
      padding: 25px;
      flex-grow: 1; /* Allow content to grow */
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-o0k9__product-title {
      font-size: 1.5em;
      color: var(--page-o0k9-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-o0k9__product-description {
      font-size: 1em;
      color: var(--page-o0k9-text-light-color);
      margin-bottom: 20px;
    }

    .page-o0k9__product-button {
      background-color: var(--page-o0k9-secondary-color);
      color: var(--page-o0k9-dark-bg);
      border: none;
      padding: 10px 20px;
      border-radius: 25px;
      font-size: 1em;
      font-weight: bold;
      cursor: pointer;
      transition: background-color 0.3s ease;
      display: inline-block;
      text-align: center;
    }

    .page-o0k9__product-button:hover {
      background-color: #ffdb4d;
    }

    /* Promotion Section */
    .page-o0k9__promotion-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .page-o0k9__promotion-card {
      background-color: var(--page-o0k9-light-bg);
      border-radius: 15px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
      overflow: hidden;
      text-align: left;
      transition: transform 0.3s ease;
      border: 1px solid var(--page-o0k9-border-color);
    }

    .page-o0k9__promotion-card:hover {
      transform: translateY(-5px);
    }

    .page-o0k9__promotion-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    .page-o0k9__promotion-content {
      padding: 25px;
    }

    .page-o0k9__promotion-title {
      font-size: 1.4em;
      color: var(--page-o0k9-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-o0k9__promotion-description {
      font-size: 1em;
      color: var(--page-o0k9-text-light-color);
      margin-bottom: 15px;
    }

    .page-o0k9__promotion-date {
      font-size: 0.9em;
      color: #999;
    }

    /* Why Choose Us Section */
    .page-o0k9__feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-o0k9__feature-item {
      background-color: var(--page-o0k9-light-bg);
      padding: 30px;
      border-radius: 15px;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease;
      border: 1px solid var(--page-o0k9-border-color);
    }

    .page-o0k9__feature-item:hover {
      transform: translateY(-5px);
    }

    .page-o0k9__feature-icon {
      width: 200px; /* Minimum size requirement */
      height: 200px; /* Minimum size requirement */
      margin: 0 auto 20px;
      object-fit: contain;
    }

    .page-o0k9__feature-title {
      font-size: 1.3em;
      color: var(--page-o0k9-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-o0k9__feature-description {
      font-size: 0.95em;
      color: var(--page-o0k9-text-light-color);
    }

    /* Payment and Providers Section */
    .page-o0k9__logo-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); /* Adjusted for more logos */
      gap: 20px;
      margin-top: 40px;
      align-items: center;
      justify-items: center;
    }

    .page-o0k9__logo-item {
      background-color: var(--page-o0k9-light-bg);
      padding: 15px;
      border-radius: 10px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.2s ease;
      border: 1px solid var(--page-o0k9-border-color);
      height: 100px; /* Fixed height for better alignment */
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .page-o0k9__logo-item:hover {
      transform: translateY(-3px);
    }

    .page-o0k9__logo-image {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      filter: grayscale(80%); /* Make logos subtle */
      transition: filter 0.3s ease;
    }

    .page-o0k9__logo-item:hover .page-o0k9__logo-image {
      filter: grayscale(0%); /* Color on hover */
    }

    /* FAQ Section */
    .page-o0k9__faq-list {
      max-width: 800px;
      margin: 40px auto 0;
      text-align: left;
    }

    .page-o0k9__faq-item {
      background-color: var(--page-o0k9-light-bg);
      border: 1px solid var(--page-o0k9-border-color);
      border-radius: 10px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .page-o0k9__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 25px;
      cursor: pointer;
      user-select: none;
      font-size: 1.1em;
      color: var(--page-o0k9-primary-color);
      font-weight: bold;
      background-color: #333;
      transition: background-color 0.3s ease;
    }

    .page-o0k9__faq-question:hover {
      background-color: #444;
    }

    .page-o0k9__faq-question h3 {
      margin: 0;
      color: inherit;
      pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-o0k9__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click */
    }

    .page-o0k9__faq-item.active .page-o0k9__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-o0k9__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px; /* Initial padding 0 to animate */
      opacity: 0;
      color: var(--page-o0k9-text-light-color);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      background-color: var(--page-o0k9-light-bg);
      font-size: 0.95em;
    }

    .page-o0k9__faq-item.active .page-o0k9__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* Call to Action Section */
    .page-o0k9__cta-section {
      background-color: var(--page-o0k9-primary-color);
      color: var(--page-o0k9-text-color);
      padding: 80px 20px;
      text-align: center;
    }

    .page-o0k9__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .page-o0k9__cta-description {
      font-size: 1.2em;
      max-width: 800px;
      margin: 0 auto 40px;
    }

    .page-o0k9__cta-button {
      background-color: var(--page-o0k9-dark-bg);
      color: var(--page-o0k9-secondary-color);
      border: 2px solid var(--page-o0k9-secondary-color);
      padding: 15px 35px;
      border-radius: 30px;
      font-size: 1.2em;
      font-weight: bold;
      cursor: pointer;
      transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
      text-decoration: none;
      display: inline-block;
    }

    .page-o0k9__cta-button:hover {
      background-color: var(--page-o0k9-light-bg);
      color: var(--page-o0k9-secondary-color);
      transform: translateY(-2px);
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .page-o0k9__hero-title {
        font-size: 2.5em;
      }
      .page-o0k9__hero-subtitle {
        font-size: 1.2em;
      }
      .page-o0k9__section-title {
        font-size: 2em;
      }
      .page-o0k9__cta-title {
        font-size: 2.2em;
      }
    }

    @media (max-width: 768px) {
      .page-o0k9__container {
        padding: 15px;
      }
      .page-o0k9__hero-section {
        padding: 10px 15px 40px;
      }
      .page-o0k9__hero-title {
        font-size: 2em;
      }
      .page-o0k9__hero-subtitle {
        font-size: 1em;
      }
      .page-o0k9__section {
        padding: 40px 15px;
      }
      .page-o0k9__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
      }
      .page-o0k9__section-description {
        font-size: 0.95em;
        margin-bottom: 30px;
      }
      .page-o0k9__product-grid,
      .page-o0k9__promotion-grid,
      .page-o0k9__feature-grid,
      .page-o0k9__logo-grid {
        grid-template-columns: 1fr; /* Single column for most grids */
        gap: 20px;
      }

      /* List Item Mobile Responsive (General for card-like lists) */
      .page-o0k9__product-card,
      .page-o0k9__promotion-card,
      .page-o0k9__feature-item,
      .page-o0k9__logo-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      /* Image responsive */
      .page-o0k9 img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-o0k9__product-image-wrapper,
      .page-o0k9__promotion-image,
      .page-o0k9__feature-icon,
      .page-o0k9__logo-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
        margin: 0 auto; /* Center images */
      }
      
      .page-o0k9__feature-icon {
        width: 200px !important; /* Enforce min size */
        height: 200px !important; /* Enforce min size */
      }
      .page-o0k9__logo-item {
        height: 80px;
      }

      .page-o0k9__faq-list {
        margin-top: 30px;
      }
      .page-o0k9__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }
      .page-o0k9__faq-answer {
        padding: 0 20px;
      }
      .page-o0k9__faq-item.active .page-o0k9__faq-answer {
        padding: 15px 20px !important;
      }

      .page-o0k9__floating-buttons {
        bottom: 15px;
        right: 15px;
        flex-direction: row; /* Horizontal on mobile */
        width: calc(100% - 30px); /* Adjust width to not exceed screen */
        justify-content: space-around;
      }
      .page-o0k9__floating-button {
        flex: 1; /* Distribute space evenly */
        padding: 10px 15px;
        font-size: 1em;
        min-width: unset; /* Remove min-width for mobile */
      }

      .page-o0k9__cta-title {
        font-size: 1.8em;
      }
      .page-o0k9__cta-description {
        font-size: 1em;
      }
      .page-o0k9__cta-button {
        padding: 12px 25px;
        font-size: 1.1em;
      }
    }

    @media (max-width: 480px) {
      .page-o0k9__hero-title {
        font-size: 1.8em;
      }
      .page-o0k9__hero-subtitle {
        font-size: 0.9em;
      }
      .page-o0k9__section-title {
        font-size: 1.6em;
      }
      .page-o0k9__cta-title {
        font-size: 1.6em;
      }
      .page-o0k9__floating-buttons {
        flex-direction: column; /* Back to vertical for very small screens */
        align-items: stretch;
      }
      .page-o0k9__floating-button {
        width: 100%;
      }
    }

    /* Ensure text wrapping for all elements */
    .page-o0k9 p,
    .page-o0k9 h1,
    .page-o0k9 h2,
    .page-o0k9 h3,
    .page-o0k9 h4,
    .page-o0k9 li,
    .page-o0k9 button,
    .page-o0k9 div {
      word-wrap: break-word !important;
      overflow-wrap: break-word !important;
      word-break: break-word !important;
    }