.page-i9ki {
      font-family: 'Arial', sans-serif; /* A common, readable font for Vietnamese */
      color: #f0f0f0; /* Light text color for dark background */
      background-color: #1a1a1a; /* Dark background */
      line-height: 1.6;
      padding-top: var(--header-offset, 122px); /* Fallback if shared.css doesn't set body padding */
    }

    /* Floating Register/Login Buttons */
    .page-i9ki__fixed-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      width: calc(100% - 40px); /* Adjust width for mobile padding */
      max-width: 350px; /* Max width for larger screens */
      box-sizing: border-box;
    }

    .page-i9ki__button {
      display: block;
      flex: 1;
      padding: 12px 20px;
      border-radius: 8px;
      text-align: center;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-sizing: border-box; /* Ensure padding is included in width */
    }

    .page-i9ki__button--register {
      background-color: #4CAF50; /* Green */
      color: #ffffff;
      border: 2px solid #4CAF50;
    }

    .page-i9ki__button--register:hover {
      background-color: #45a049;
      transform: translateY(-2px);
    }

    .page-i9ki__button--login {
      background-color: #007bff; /* Blue */
      color: #ffffff;
      border: 2px solid #007bff;
    }

    .page-i9ki__button--login:hover {
      background-color: #0056b3;
      transform: translateY(-2px);
    }

    .page-i9ki__button--primary {
      background-color: #e44d26; /* Orange/Red for primary CTA */
      color: #ffffff;
      border: none;
      padding: 15px 30px;
      font-size: 1.2em;
      border-radius: 10px;
    }

    .page-i9ki__button--primary:hover {
      background-color: #c23b1e;
      transform: translateY(-2px);
    }

    .page-i9ki__button--secondary {
      background-color: transparent;
      color: #e44d26;
      border: 2px solid #e44d26;
      padding: 15px 30px;
      font-size: 1.2em;
      border-radius: 10px;
    }

    .page-i9ki__button--secondary:hover {
      background-color: #e44d26;
      color: #ffffff;
      transform: translateY(-2px);
    }

    .page-i9ki__button--product {
      background-color: #333;
      color: #e44d26;
      border: 1px solid #e44d26;
      padding: 10px 15px;
      font-size: 0.9em;
      border-radius: 5px;
      cursor: pointer;
    }

    .page-i9ki__button--product:hover {
      background-color: #e44d26;
      color: #ffffff;
    }

    .page-i9ki__button--large {
      padding: 18px 40px;
      font-size: 1.4em;
    }

    /* Section General Styles */
    .page-i9ki__hero-section,
    .page-i9ki__products-section,
    .page-i9ki__why-choose-us-section,
    .page-i9ki__payment-section,
    .page-i9ki__providers-section,
    .page-i9ki__faq-section,
    .page-i9ki__cta-section {
      padding: 60px 20px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .page-i9ki__section-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      color: #e44d26; /* Accent color for titles */
      font-weight: bold;
    }

    .page-i9ki__section-description {
      font-size: 1.1em;
      margin-bottom: 40px;
      color: #cccccc;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Hero Section */
    .page-i9ki__hero-section {
      background-color: #222;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 70vh;
      padding-top: 10px; /* Small decorative padding, assuming body has offset */
    }

    .page-i9ki__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 1;
      opacity: 0.4;
    }

    .page-i9ki__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.9));
      z-index: 2;
    }

    .page-i9ki__hero-content {
      position: relative;
      z-index: 3;
      max-width: 900px;
      padding: 20px;
    }

    .page-i9ki__hero-title {
      font-size: 3.5em;
      color: #ffffff;
      margin-bottom: 20px;
      line-height: 1.2;
      font-weight: bold;
    }

    .page-i9ki__hero-subtitle {
      font-size: 1.5em;
      color: #f0f0f0;
      margin-bottom: 40px;
    }

    .page-i9ki__hero-cta-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* Products Section */
    .page-i9ki__products-section {
      background-color: #1a1a1a;
    }

    .page-i9ki__product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-i9ki__product-card {
      background-color: #2c2c2c;
      border-radius: 12px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      box-sizing: border-box;
    }

    .page-i9ki__product-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .page-i9ki__product-image {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      margin-bottom: 20px;
      object-fit: cover;
      width: 100%; /* Ensure image takes full width of card */
      min-height: 200px; /* Minimum height for product images */
    }

    .page-i9ki__product-title {
      font-size: 1.8em;
      color: #e44d26;
      margin-bottom: 10px;
    }

    .page-i9ki__product-text {
      font-size: 1em;
      color: #cccccc;
      margin-bottom: 20px;
      flex-grow: 1; /* Allow text to grow and push button down */
    }

    /* Why Choose Us Section */
    .page-i9ki__why-choose-us-section {
      background-color: #222;
    }

    .page-i9ki__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-i9ki__feature-item {
      background-color: #2c2c2c;
      border-radius: 12px;
      padding: 30px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
    }

    .page-i9ki__feature-item:hover {
      transform: translateY(-8px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .page-i9ki__feature-icon {
      width: 250px; /* placeholder size */
      height: auto;
      margin-bottom: 20px;
      max-width: 100%;
      object-fit: contain;
    }

    .page-i9ki__feature-title {
      font-size: 1.6em;
      color: #e44d26;
      margin-bottom: 10px;
    }

    .page-i9ki__feature-description {
      font-size: 1em;
      color: #cccccc;
    }

    /* Payment & Providers Section */
    .page-i9ki__payment-section,
    .page-i9ki__providers-section {
      background-color: #1a1a1a;
    }

    .page-i9ki__payment-grid,
    .page-i9ki__providers-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-i9ki__payment-item,
    .page-i9ki__provider-item {
      background-color: #2c2c2c;
      border-radius: 8px;
      padding: 15px 20px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-width: 120px;
      flex: 1 1 150px; /* Allow items to grow/shrink, base width 150px */
      max-width: 200px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-decoration: none;
      color: #f0f0f0;
      font-weight: bold;
      box-sizing: border-box;
    }

    .page-i9ki__payment-item:hover,
    .page-i9ki__provider-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
    }

    .page-i9ki__payment-logo,
    .page-i9ki__provider-logo {
      max-width: 100px; /* Max width for logos */
      height: auto;
      margin-bottom: 10px;
      object-fit: contain;
      min-width: 80px; /* Ensure logos are visible */
      min-height: 50px;
    }

    /* FAQ Section */
    .page-i9ki__faq-section {
      background-color: #222;
      padding-bottom: 80px; /* Extra padding for fixed buttons */
    }

    .page-i9ki__faq-container {
      max-width: 800px;
      margin: 0 auto;
      text-align: left;
    }

    .page-i9ki__faq-item {
      background-color: #2c2c2c;
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      box-sizing: border-box;
    }

    .page-i9ki__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      cursor: pointer;
      user-select: none;
      background-color: #333;
      color: #f0f0f0;
      transition: background-color 0.3s ease;
      box-sizing: border-box;
    }

    .page-i9ki__faq-question:hover {
      background-color: #444;
    }

    .page-i9ki__faq-title {
      font-size: 1.2em;
      margin: 0;
      color: #e44d26;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-i9ki__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: #e44d26;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent span from blocking click event */
    }

    .page-i9ki__faq-item.active .page-i9ki__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-i9ki__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px; /* Initial padding for collapsed state */
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: #cccccc;
      font-size: 1em;
      box-sizing: border-box;
    }

    .page-i9ki__faq-item.active .page-i9ki__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show all content */
      padding: 20px 25px !important; /* Padding for expanded state */
      opacity: 1;
    }

    /* Call to Action Section */
    .page-i9ki__cta-section {
      background-color: #1a1a1a;
      padding-bottom: 100px; /* Ensure space for fixed buttons */
    }

    .page-i9ki__cta-title {
      font-size: 2.8em;
      color: #e44d26;
      margin-bottom: 20px;
    }

    .page-i9ki__cta-description {
      font-size: 1.2em;
      color: #f0f0f0;
      margin-bottom: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .page-i9ki__hero-title {
        font-size: 3em;
      }
      .page-i9ki__hero-subtitle {
        font-size: 1.3em;
      }
      .page-i9ki__section-title {
        font-size: 2.2em;
      }
      .page-i9ki__cta-title {
        font-size: 2.5em;
      }
    }

    @media (max-width: 768px) {
      .page-i9ki {
        padding-bottom: 100px; /* Space for fixed buttons */
      }
      .page-i9ki__hero-section {
        min-height: 60vh;
        padding-top: 10px; /* Small decorative padding */
      }
      .page-i9ki__hero-title {
        font-size: 2.5em;
      }
      .page-i9ki__hero-subtitle {
        font-size: 1.1em;
      }
      .page-i9ki__hero-cta-group {
        flex-direction: column;
        gap: 15px;
      }
      .page-i9ki__button--primary,
      .page-i9ki__button--secondary,
      .page-i9ki__button--large {
        width: 100%;
        max-width: 300px; /* Limit width for buttons */
        margin: 0 auto;
      }

      .page-i9ki__fixed-buttons {
        width: calc(100% - 30px); /* Adjust width for smaller screens */
        gap: 10px;
        bottom: 15px;
      }
      .page-i9ki__button {
        font-size: 1em;
        padding: 10px 15px;
      }

      .page-i9ki__section-title {
        font-size: 1.8em;
      }
      .page-i9ki__section-description {
        font-size: 0.95em;
        margin-bottom: 30px;
      }

      .page-i9ki__product-grid,
      .page-i9ki__features-grid {
        grid-template-columns: 1fr; /* Single column for mobile */
        gap: 20px;
      }

      .page-i9ki__product-card,
      .page-i9ki__feature-item {
        padding: 20px;
      }

      /* List item responsive requirements */
      .page-i9ki__payment-grid,
      .page-i9ki__providers-grid {
        flex-direction: row; /* Keep row for small logos */
        flex-wrap: wrap;
        gap: 10px;
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
      }
      .page-i9ki__payment-item,
      .page-i9ki__provider-item {
        flex: 1 1 calc(50% - 15px) !important; /* Two columns for payment/providers */
        max-width: calc(50% - 15px) !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
        padding: 10px;
      }
      .page-i9ki__payment-item span,
      .page-i9ki__provider-item span {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
        font-size: 0.9em;
      }
      .page-i9ki__payment-logo,
      .page-i9ki__provider-logo {
        max-width: 80px;
        min-width: 60px;
        min-height: 40px;
      }

      .page-i9ki__faq-question {
        padding: 15px 20px;
      }
      .page-i9ki__faq-title {
        font-size: 1.1em;
      }
      .page-i9ki__faq-toggle {
        font-size: 1.5em;
      }
      .page-i9ki__faq-answer {
        padding: 0 20px;
      }
      .page-i9ki__faq-item.active .page-i9ki__faq-answer {
        padding: 15px 20px !important;
      }

      .page-i9ki__cta-title {
        font-size: 2em;
      }
      .page-i9ki__cta-description {
        font-size: 1em;
      }
    }

    @media (max-width: 480px) {
      .page-i9ki__hero-title {
        font-size: 2em;
      }
      .page-i9ki__hero-subtitle {
        font-size: 1em;
      }
      .page-i9ki__section-title {
        font-size: 1.6em;
      }
      .page-i9ki__cta-title {
        font-size: 1.8em;
      }
      .page-i9ki__button--primary,
      .page-i9ki__button--secondary,
      .page-i9ki__button--large {
        font-size: 1.1em;
        padding: 12px 20px;
      }

      .page-i9ki__fixed-buttons {
        width: calc(100% - 20px);
        gap: 8px;
        bottom: 10px;
      }
      .page-i9ki__button {
        font-size: 0.9em;
        padding: 8px 10px;
      }

      .page-i9ki__payment-item,
      .page-i9ki__provider-item {
        flex: 1 1 calc(100% - 20px) !important; /* Single column for payment/providers on very small screens */
        max-width: calc(100% - 20px) !important;
      }
    }