:root {
      --page-123b-primary-color: #e44d26; /* Cam đỏ */
      --page-123b-secondary-color: #333; /* Xám đậm */
      --page-123b-accent-color: #ffcc00; /* Vàng */
      --page-123b-text-light: #f8f8f8; /* Trắng ngà */
      --page-123b-text-dark: #222; /* Đen gần */
      --page-123b-bg-dark: #1a1a1a; /* Nền tối */
      --page-123b-bg-light: #2c2c2c; /* Nền xám nhạt hơn */
    }

    .page-123b {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      color: var(--page-123b-text-light);
      background-color: var(--page-123b-bg-dark);
      line-height: 1.6;
    }

    .page-123b-section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      text-align: center;
    }

    .page-123b-section:nth-of-type(even) {
      background-color: var(--page-123b-bg-light);
    }

    .page-123b-hero {
      position: relative;
      background-color: #000;
      color: var(--page-123b-text-light);
      padding: 0;
      text-align: center;
    }

    .page-123b-hero-banner {
      width: 100%;
      height: 250px; /* Adjust height for mobile */
      object-fit: cover;
      display: block;
    }
    @media (min-width: 768px) {
      .page-123b-hero-banner {
        height: 400px; /* Adjust height for desktop */
      }
    }

    .page-123b-hero-content {
      position: absolute;
      bottom: 20px; /* Position text below banner */
      left: 50%;
      transform: translateX(-50%);
      width: 90%;
      max-width: 800px;
      background-color: rgba(0, 0, 0, 0.6);
      padding: 15px;
      border-radius: 8px;
    }

    .page-123b-hero h1 {
      color: var(--page-123b-accent-color);
      font-size: 2.2em;
      margin-bottom: 10px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }
    @media (min-width: 768px) {
      .page-123b-hero h1 {
        font-size: 3em;
      }
    }

    .page-123b-hero p {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-123b-text-light);
    }

    .page-123b-button {
      display: inline-block;
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-text-light);
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      font-size: 1.1em;
      border: none;
      cursor: pointer;
    }

    .page-123b-button:hover {
      background-color: #ff6633; /* Slightly lighter orange */
    }

    .page-123b-floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-123b-floating-buttons .page-123b-button {
      padding: 10px 15px;
      font-size: 0.95em;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      background-color: var(--page-123b-primary-color); /* Đăng ký */
    }

    .page-123b-floating-buttons .page-123b-button.login {
      background-color: var(--page-123b-accent-color); /* Đăng nhập */
      color: var(--page-123b-text-dark);
    }
    .page-123b-floating-buttons .page-123b-button.login:hover {
      background-color: #ffdb4d;
    }

    .page-123b h2 {
      color: var(--page-123b-primary-color);
      font-size: 2em;
      margin-bottom: 25px;
      text-transform: uppercase;
    }

    .page-123b h3 {
      color: var(--page-123b-accent-color);
      font-size: 1.5em;
      margin-bottom: 15px;
    }

    .page-123b p {
      margin-bottom: 15px;
      color: var(--page-123b-text-light);
    }

    .page-123b-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-123b-card {
      background-color: var(--page-123b-bg-dark);
      border: 1px solid var(--page-123b-secondary-color);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      text-align: left;
      transition: transform 0.3s ease;
    }

    .page-123b-card:hover {
      transform: translateY(-5px);
    }

    .page-123b-card-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }

    .page-123b-card-content {
      padding: 20px;
    }

    .page-123b-card-content h3 {
      margin-top: 0;
      font-size: 1.3em;
      color: var(--page-123b-accent-color);
    }

    .page-123b-card-content p {
      font-size: 0.95em;
      color: #ccc;
    }

    .page-123b-list {
      list-style: none;
      padding: 0;
      margin-top: 20px;
      text-align: left;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .page-123b-list li {
      background-color: var(--page-123b-bg-light);
      padding: 10px 15px;
      border-left: 3px solid var(--page-123b-primary-color);
      margin-bottom: 10px;
      border-radius: 5px;
      color: var(--page-123b-text-light);
      width: calc(50% - 15px); /* Two columns on larger screens */
      box-sizing: border-box;
    }
    @media (max-width: 767px) {
      .page-123b-list li {
        width: 100%; /* One column on mobile */
      }
    }

    .page-123b-faq-item {
      background-color: var(--page-123b-bg-light);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
    }

    .page-123b-faq-question {
      background-color: var(--page-123b-secondary-color);
      padding: 15px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      color: var(--page-123b-accent-color);
      font-size: 1.1em;
    }

    .page-123b-faq-question::after {
      content: '+';
      font-size: 1.5em;
      transition: transform 0.3s ease;
    }

    .page-123b-faq-question.active::after {
      transform: rotate(45deg);
    }

    .page-123b-faq-answer {
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-out, padding 0.4s ease-out;
      color: var(--page-123b-text-light);
    }

    .page-123b-faq-answer.active {
      max-height: 200px; /* Adjust as needed, or use JS to calculate */
      padding: 15px 20px;
    }