:root {
      --page-primary-color: #007bff;
      --page-secondary-color: #6c757d;
      --page-text-color: #333;
      --page-background-color: #f8f9fa;
      --page-white-color: #ffffff;
      --page-dark-grey: #495057;
      --page-light-grey: #e9ecef;
      --page-border-color: #dee2e6;
      --page-accent-color: #ffc107; /* For buttons/highlights */
    }

    .page-resources-is-vf555-popular-in-vietnam {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-text-color);
      background-color: var(--page-background-color);
      padding: 20px;
      max-width: 1200px;
      margin: 0 auto;
      box-sizing: border-box;
    }

    .page-resources-is-vf555-popular-in-vietnam__hero-section {
      background-color: var(--page-dark-grey);
      color: var(--page-white-color);
      padding: 80px 20px 40px; /* Adjusted padding-top for fixed header */
      text-align: center;
      margin-bottom: 40px;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0,0,0,0.1);
      position: relative;
      overflow: hidden;
    }

    .page-resources-is-vf555-popular-in-vietnam__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
      z-index: 1;
    }

    .page-resources-is-vf555-popular-in-vietnam__hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
    }

    .page-resources-is-vf555-popular-in-vietnam__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-white-color);
      text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    .page-resources-is-vf555-popular-in-vietnam__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: var(--page-light-grey);
    }

    .page-resources-is-vf555-popular-in-vietnam__section {
      background-color: var(--page-white-color);
      padding: 30px;
      margin-bottom: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .page-resources-is-vf555-popular-in-vietnam__section-title {
      color: var(--page-primary-color);
      font-size: 2em;
      margin-bottom: 20px;
      border-bottom: 2px solid var(--page-light-grey);
      padding-bottom: 10px;
    }

    .page-resources-is-vf555-popular-in-vietnam__paragraph {
      margin-bottom: 15px;
      font-size: 1.05em;
      line-height: 1.7;
    }

    .page-resources-is-vf555-popular-in-vietnam__list {
      list-style-type: disc;
      margin-left: 25px;
      margin-bottom: 20px;
    }

    .page-resources-is-vf555-popular-in-vietnam__list-item {
      margin-bottom: 8px;
    }

    .page-resources-is-vf555-popular-in-vietnam__image-container {
      margin: 30px 0;
      text-align: center;
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-resources-is-vf555-popular-in-vietnam__content-image {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      display: block;
      margin: 0 auto;
    }

    .page-resources-is-vf555-popular-in-vietnam__call-to-action {
      text-align: center;
      margin-top: 40px;
      padding: 30px;
      background-color: var(--page-primary-color);
      color: var(--page-white-color);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }

    .page-resources-is-vf555-popular-in-vietnam__cta-title {
      font-size: 2.2em;
      margin-bottom: 15px;
    }

    .page-resources-is-vf555-popular-in-vietnam__cta-text {
      font-size: 1.1em;
      margin-bottom: 25px;
    }

    .page-resources-is-vf555-popular-in-vietnam__cta-button {
      display: inline-block;
      background-color: var(--page-accent-color);
      color: var(--page-dark-grey);
      padding: 15px 30px;
      border-radius: 5px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-resources-is-vf555-popular-in-vietnam__cta-button:hover {
      background-color: #e0a800;
      transform: translateY(-2px);
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-section {
      background-color: var(--page-white-color);
      padding: 30px;
      margin-top: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-title {
      color: var(--page-primary-color);
      font-size: 2em;
      margin-bottom: 20px;
      border-bottom: 2px solid var(--page-light-grey);
      padding-bottom: 10px;
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-item {
      border-bottom: 1px solid var(--page-border-color);
      margin-bottom: 10px;
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 0;
      cursor: pointer;
      user-select: none;
      font-weight: bold;
      color: var(--page-dark-grey);
      transition: color 0.3s ease;
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-question:hover {
      color: var(--page-primary-color);
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-question h3 {
      margin: 0;
      font-size: 1.2em;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-toggle {
      font-size: 1.5em;
      margin-left: 10px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event */
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-item.active .page-resources-is-vf555-popular-in-vietnam__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-resources-is-vf555-popular-in-vietnam__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 0.3s ease;
      color: var(--page-text-color);
    }

    .page-resources-is-vf555-popular-in-vietnam__faq-item.active .page-resources-is-vf555-popular-in-vietnam__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-resources-is-vf555-popular-in-vietnam {
        padding: 15px;
      }

      .page-resources-is-vf555-popular-in-vietnam__hero-section {
        padding: 70px 15px 30px; /* Adjusted padding-top for fixed header on mobile */
      }

      .page-resources-is-vf555-popular-in-vietnam__hero-title {
        font-size: 2em;
      }

      .page-resources-is-vf555-popular-in-vietnam__hero-description {
        font-size: 1em;
      }

      .page-resources-is-vf555-popular-in-vietnam__section {
        padding: 20px;
        margin-bottom: 20px;
      }

      .page-resources-is-vf555-popular-in-vietnam__section-title {
        font-size: 1.6em;
      }

      .page-resources-is-vf555-popular-in-vietnam__paragraph {
        font-size: 0.95em;
      }

      .page-resources-is-vf555-popular-in-vietnam__list {
        margin-left: 20px;
      }

      .page-resources-is-vf555-popular-in-vietnam__cta-title {
        font-size: 1.8em;
      }

      .page-resources-is-vf555-popular-in-vietnam__cta-text {
        font-size: 1em;
      }

      .page-resources-is-vf555-popular-in-vietnam__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-resources-is-vf555-popular-in-vietnam__faq-question {
        padding: 12px 0;
      }

      .page-resources-is-vf555-popular-in-vietnam__faq-question h3 {
        font-size: 1.1em;
      }

      .page-resources-is-vf555-popular-in-vietnam__faq-toggle {
        font-size: 1.3em;
      }

      /* Image responsive optimization for mobile */
      .page-resources-is-vf555-popular-in-vietnam__image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
      .page-resources-is-vf555-popular-in-vietnam__content-image {
        max-width: 100% !important;
        height: auto !important;
      }
    }

    @media (max-width: 480px) {
      .page-resources-is-vf555-popular-in-vietnam__hero-title {
        font-size: 1.8em;
      }
      .page-resources-is-vf555-popular-in-vietnam__section-title {
        font-size: 1.4em;
      }
    }