/* CSS cho trang nhacha5 */
    :root {
      --page-nhacha5-primary-bg: #1A1A1A;
      --page-nhacha5-secondary-bg: #2C2C2C;
      --page-nhacha5-accent-color: #FFD700; /* Vàng */
      --page-nhacha5-text-color: #FFFFFF;
      --page-nhacha5-text-light: #E0E0E0;
      --page-nhacha5-button-bg: #4CAF50; /* Xanh lá */
      --page-nhacha5-button-hover-bg: #45a049;
      --page-nhacha5-border-color: #444;
      --page-nhacha5-card-bg: #222;
    }

    .page-nhacha5 {
      font-family: 'Arial', sans-serif;
      color: var(--page-nhacha5-text-color);
      background-color: var(--page-nhacha5-primary-bg);
      line-height: 1.6;
      padding-bottom: 80px; /* Khoảng trống cho quảng cáo nổi */
    }

    .page-nhacha5-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-nhacha5-hero {
      background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('[GALLERY:banner:hero,keo_nha_cai_5,banner]') no-repeat center center / cover;
      padding: 80px 20px;
      text-align: center;
      margin-bottom: 40px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    }

    .page-nhacha5-hero h1 {
      font-size: 2.8em;
      color: var(--page-nhacha5-accent-color);
      margin-bottom: 20px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-nhacha5-hero p {
      font-size: 1.2em;
      color: var(--page-nhacha5-text-light);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nhacha5-button {
      display: inline-block;
      background-color: var(--page-nhacha5-button-bg);
      color: var(--page-nhacha5-text-color);
      padding: 15px 30px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      font-size: 1.1em;
      border: none;
      cursor: pointer;
    }

    .page-nhacha5-button:hover {
      background-color: var(--page-nhacha5-button-hover-bg);
      transform: translateY(-2px);
    }

    .page-nhacha5-section {
      background-color: var(--page-nhacha5-secondary-bg);
      padding: 40px;
      margin-bottom: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    .page-nhacha5-section h2 {
      color: var(--page-nhacha5-accent-color);
      font-size: 2em;
      margin-bottom: 25px;
      text-align: center;
      position: relative;
      padding-bottom: 10px;
    }

    .page-nhacha5-section h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 3px;
      background-color: var(--page-nhacha5-button-bg);
      border-radius: 2px;
    }

    .page-nhacha5-section h3 {
      color: var(--page-nhacha5-text-color);
      font-size: 1.5em;
      margin-top: 30px;
      margin-bottom: 15px;
      border-left: 5px solid var(--page-nhacha5-accent-color);
      padding-left: 10px;
    }

    .page-nhacha5-section p, .page-nhacha5-section li {
      color: var(--page-nhacha5-text-light);
      margin-bottom: 10px;
    }

    .page-nhacha5-section ul {
      list-style-type: disc;
      padding-left: 25px;
    }

    .page-nhacha5-section ol {
      list-style-type: decimal;
      padding-left: 25px;
    }

    .page-nhacha5-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-nhacha5-card {
      background-color: var(--page-nhacha5-card-bg);
      border-radius: 8px;
      padding: 25px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
      text-align: center;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      border: 1px solid var(--page-nhacha5-border-color);
    }

    .page-nhacha5-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6);
    }

    .page-nhacha5-card img {
      max-width: 100px;
      margin-bottom: 15px;
      filter: drop-shadow(0 0 5px var(--page-nhacha5-accent-color));
    }

    .page-nhacha5-card h4 {
      color: var(--page-nhacha5-accent-color);
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-nhacha5-card p {
      color: var(--page-nhacha5-text-light);
      font-size: 0.95em;
    }

    .page-nhacha5-card .page-nhacha5-button {
      margin-top: 20px;
      padding: 10px 20px;
      font-size: 0.9em;
    }

    .page-nhacha5-faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--page-nhacha5-border-color);
      border-radius: 5px;
      overflow: hidden;
    }

    .page-nhacha5-faq-question {
      background-color: #3a3a3a;
      padding: 15px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      color: var(--page-nhacha5-text-color);
      transition: background-color 0.3s ease;
    }

    .page-nhacha5-faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-nhacha5-faq-question .page-nhacha5-icon {
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-nhacha5-faq-answer {
      background-color: var(--page-nhacha5-card-bg);
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-out, padding 0.4s ease-out;
      color: var(--page-nhacha5-text-light);
    }

    .page-nhacha5-faq-answer p {
      padding: 15px 0;
      margin: 0;
    }

    .page-nhacha5-faq-item.active .page-nhacha5-faq-answer {
      max-height: 200px; /* Điều chỉnh khi cần */
      padding: 15px 20px;
    }

    .page-nhacha5-faq-item.active .page-nhacha5-icon {
      transform: rotate(180deg);
    }

    .page-nhacha5-floating-ad {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-nhacha5-accent-color);
      color: #333;
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 15px;
      max-width: 300px;
      flex-wrap: wrap;
      text-align: center;
    }

    .page-nhacha5-floating-ad p {
      margin: 0;
      font-weight: bold;
      color: #333;
    }

    .page-nhacha5-floating-ad .page-nhacha5-button {
      background-color: var(--page-nhacha5-button-bg);
      color: var(--page-nhacha5-text-color);
      padding: 8px 15px;
      font-size: 0.9em;
      margin: 0;
    }
    
    .page-nhacha5-floating-ad .page-nhacha5-button:hover {
        background-color: var(--page-nhacha5-button-hover-bg);
    }

    /* Thiết kế đáp ứng */
    @media (max-width: 768px) {
      .page-nhacha5-hero {
        padding: 60px 15px;
      }

      .page-nhacha5-hero h1 {
        font-size: 2em;
      }

      .page-nhacha5-hero p {
        font-size: 1em;
      }

      .page-nhacha5-section {
        padding: 25px;
      }

      .page-nhacha5-section h2 {
        font-size: 1.8em;
      }

      .page-nhacha5-section h3 {
        font-size: 1.3em;
      }

      .page-nhacha5-grid {
        grid-template-columns: 1fr;
      }
      
      .page-nhacha5-floating-ad {
        bottom: 10px;
        right: 10px;
        max-width: 90%;
        justify-content: center;
      }
    }

    @media (max-width: 480px) {
      .page-nhacha5-hero h1 {
        font-size: 1.6em;
      }
      .page-nhacha5-button {
        padding: 12px 20px;
        font-size: 1em;
      }
      .page-nhacha5-section h2 {
        font-size: 1.5em;
      }
      .page-nhacha5-section h3 {
        font-size: 1.2em;
      }
      .page-nhacha5-floating-ad {
        flex-direction: column;
        gap: 10px;
        padding: 10px 15px;
      }
    }