:root {
      --primary-color: #e44d26; /* Màu cam đỏ */
      --secondary-color: #333;
      --accent-color: #f7b000; /* Màu vàng cam */
      --text-color: #ffffff;
      --bg-dark: #1a1a1a;
      --bg-light: #2c2c2c;
      --border-color: #444;
      --button-hover-bg: #c73c1c;
      --faq-question-bg: #3a3a3a;
      --faq-answer-bg: #2a2a2a;
    }

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

    .page-truc-tiep-cpc4 {
      max-width: 1200px;
      margin: 0 auto;
      padding: 10px 15px 40px;
      box-sizing: border-box;
    }

    /* Fallback for header offset if shared.css doesn't provide it on body */
    .page-truc-tiep-cpc4:not(.has-body-padding) {
      padding-top: var(--header-offset, 122px); /* Default to 122px if not set */
    }

    .page-truc-tiep-cpc4__hero-section {
      position: relative;
      background-color: var(--bg-dark);
      color: var(--text-color);
      text-align: center;
      padding-top: 10px; /* Small top padding for hero after body padding */
      margin-bottom: 40px;
      overflow: hidden;
      border-radius: 10px;
    }

    .page-truc-tiep-cpc4__hero-image {
      width: 100%;
      height: auto;
      max-height: 500px;
      object-fit: cover;
      border-radius: 10px;
      display: block;
    }

    .page-truc-tiep-cpc4__hero-content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 90%;
      max-width: 800px;
      padding: 20px;
      background: rgba(0, 0, 0, 0.7);
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-truc-tiep-cpc4__main-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      line-height: 1.2;
    }

    .page-truc-tiep-cpc4__hero-subtitle {
      font-size: 1.3em;
      margin-bottom: 25px;
      color: #ddd;
    }

    .page-truc-tiep-cpc4__cta-button {
      display: inline-block;
      background-color: var(--primary-color);
      color: var(--text-color);
      padding: 15px 30px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-truc-tiep-cpc4__cta-button:hover {
      background-color: var(--button-hover-bg);
      transform: translateY(-2px);
    }

    .page-truc-tiep-cpc4__section {
      background-color: var(--bg-light);
      padding: 30px;
      margin-bottom: 30px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .page-truc-tiep-cpc4__section-title {
      font-size: 2em;
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 25px;
      position: relative;
    }

    .page-truc-tiep-cpc4__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background-color: var(--accent-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-truc-tiep-cpc4__content-text {
      font-size: 1.1em;
      line-height: 1.8;
      margin-bottom: 20px;
      color: #ccc;
    }

    .page-truc-tiep-cpc4__image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 25px;
      text-align: center;
    }

    .page-truc-tiep-cpc4__content-image {
      width: 100%;
      max-width: 800px;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .page-truc-tiep-cpc4__feature-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .page-truc-tiep-cpc4__feature-item {
      background-color: var(--faq-question-bg);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease;
      box-sizing: border-box; /* Crucial for responsive list items */
    }

    .page-truc-tiep-cpc4__feature-item:hover {
      transform: translateY(-5px);
    }

    .page-truc-tiep-cpc4__feature-title {
      color: var(--accent-color);
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-truc-tiep-cpc4__feature-description {
      color: #bbb;
      font-size: 0.95em;
    }

    .page-truc-tiep-cpc4__provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-truc-tiep-cpc4__provider-item {
      background-color: var(--faq-question-bg);
      padding: 15px;
      border-radius: 8px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
      box-sizing: border-box;
      color: var(--text-color);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-truc-tiep-cpc4__provider-item:hover {
      background-color: var(--primary-color);
    }

    .page-truc-tiep-cpc4__faq-section {
      margin-top: 40px;
    }

    .page-truc-tiep-cpc4__faq-title {
      font-size: 2em;
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 30px;
      position: relative;
    }

    .page-truc-tiep-cpc4__faq-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background-color: var(--accent-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-truc-tiep-cpc4__faq-item {
      background-color: var(--bg-light);
      border: 1px solid var(--border-color);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .page-truc-tiep-cpc4__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: var(--faq-question-bg);
      color: var(--text-color);
      cursor: pointer;
      user-select: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-truc-tiep-cpc4__faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-truc-tiep-cpc4__faq-question h3 {
      margin: 0;
      color: var(--text-color);
      font-size: 1em;
      pointer-events: none; /* Prevent h3 from blocking click on parent */
    }

    .page-truc-tiep-cpc4__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent */
    }

    .page-truc-tiep-cpc4__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      background-color: var(--faq-answer-bg);
      color: #ccc;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      font-size: 0.95em;
    }

    .page-truc-tiep-cpc4__faq-item.active .page-truc-tiep-cpc4__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px !important;
      opacity: 1;
    }

    .page-truc-tiep-cpc4__faq-item.active .page-truc-tiep-cpc4__faq-toggle {
      transform: rotate(45deg); /* Transforms '+' to 'x' or '-' */
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-truc-tiep-cpc4 {
        padding: 10px 10px 30px;
      }

      .page-truc-tiep-cpc4__hero-content {
        width: 95%;
        padding: 15px;
      }

      .page-truc-tiep-cpc4__main-title {
        font-size: 2em;
      }

      .page-truc-tiep-cpc4__hero-subtitle {
        font-size: 1em;
        margin-bottom: 20px;
      }

      .page-truc-tiep-cpc4__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-truc-tiep-cpc4__section {
        padding: 20px;
      }

      .page-truc-tiep-cpc4__section-title,
      .page-truc-tiep-cpc4__faq-title {
        font-size: 1.8em;
      }

      .page-truc-tiep-cpc4__content-text {
        font-size: 1em;
      }

      .page-truc-tiep-cpc4__feature-list {
        grid-template-columns: 1fr; /* Stack items on small screens */
      }

      .page-truc-tiep-cpc4__feature-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 15px; /* Adjust padding for mobile */
      }

      .page-truc-tiep-cpc4__feature-description {
        word-wrap: break-word !important; /* Ensure text wraps */
        overflow-wrap: break-word !important;
      }

      .page-truc-tiep-cpc4__provider-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 15px;
      }

      .page-truc-tiep-cpc4__provider-item {
        font-size: 0.9em;
        padding: 12px;
      }

      .page-truc-tiep-cpc4__faq-question {
        font-size: 1em;
        padding: 12px 15px;
      }

      .page-truc-tiep-cpc4__faq-answer {
        padding: 0 15px;
      }
      .page-truc-tiep-cpc4__faq-item.active .page-truc-tiep-cpc4__faq-answer {
        padding: 15px !important;
      }

      /* Image responsive styles */
      .page-truc-tiep-cpc4__hero-image,
      .page-truc-tiep-cpc4__content-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-truc-tiep-cpc4__image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-truc-tiep-cpc4__main-title {
        font-size: 1.8em;
      }

      .page-truc-tiep-cpc4__hero-subtitle {
        font-size: 0.9em;
      }

      .page-truc-tiep-cpc4__section-title,
      .page-truc-tiep-cpc4__faq-title {
        font-size: 1.6em;
      }
    }