/* CSS cho trang 90ok.com */
    :root {
      --page-90oknew-primary: #FFD700; /* Vàng kim */
      --page-90oknew-secondary: #008000; /* Xanh lá đậm */
      --page-90oknew-accent: #FF4500; /* Cam đỏ */
      --page-90oknew-dark: #333333; /* Xám đậm */
      --page-90oknew-light: #F8F8F8; /* Xám nhạt */
      --page-90oknew-text-light: #FFFFFF; /* Trắng */
      --page-90oknew-text-dark: #333333; /* Xám đậm */
      --page-90oknew-shadow: rgba(0, 0, 0, 0.1);
    }

    .page-90oknew-container {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-90oknew-text-dark);
      background-color: var(--page-90oknew-light);
      padding: 20px 0;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-90oknew-section {
      background-color: var(--page-90oknew-text-light);
      border-radius: 10px;
      box-shadow: var(--page-90oknew-shadow);
      margin-bottom: 25px;
      padding: 25px;
      overflow: hidden; /* Clear floats */
    }

    .page-90oknew-section-dark {
        background-color: var(--page-90oknew-dark);
        color: var(--page-90oknew-text-light);
    }

    .page-90oknew-section-dark h2,
    .page-90oknew-section-dark h3,
    .page-90oknew-section-dark p,
    .page-90oknew-section-dark ul li {
        color: var(--page-90oknew-text-light);
    }

    .page-90oknew-header {
      text-align: center;
      margin-bottom: 30px;
    }

    .page-90oknew-header h1 {
      color: var(--page-90oknew-dark);
      font-size: 2.8em;
      margin-bottom: 10px;
      line-height: 1.2;
    }

    .page-90oknew-header p {
      font-size: 1.2em;
      color: #555;
    }

    .page-90oknew-button {
      display: inline-block;
      background-color: var(--page-90oknew-secondary);
      color: var(--page-90oknew-text-light);
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      margin-top: 15px;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-90oknew-button:hover {
      background-color: var(--page-90oknew-primary);
      color: var(--page-90oknew-dark);
    }

    .page-90oknew-button.primary {
        background-color: var(--page-90oknew-primary);
        color: var(--page-90oknew-dark);
    }

    .page-90oknew-button.primary:hover {
        background-color: var(--page-90oknew-secondary);
        color: var(--page-90oknew-text-light);
    }

    .page-90oknew-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      margin-top: 20px;
    }

    .page-90oknew-card {
      background-color: var(--page-90oknew-light);
      border-radius: 8px;
      box-shadow: var(--page-90oknew-shadow);
      padding: 20px;
      text-align: center;
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .page-90oknew-card:hover {
      transform: translateY(-5px);
    }

    .page-90oknew-card img {
      max-width: 100%;
      height: auto;
      border-radius: 5px;
      margin-bottom: 15px;
      max-height: 180px;
      object-fit: cover;
    }

    .page-90oknew-card h3 {
      color: var(--page-90oknew-secondary);
      font-size: 1.4em;
      margin-bottom: 10px;
    }

    .page-90oknew-card h3 a {
        color: var(--page-90oknew-secondary);
        text-decoration: none;
    }

    .page-90oknew-card h3 a:hover {
        text-decoration: underline;
    }

    .page-90oknew-card p {
      font-size: 0.95em;
      color: #666;
    }

    .page-90oknew-card .page-90oknew-button {
        margin-top: 15px;
    }

    .page-90oknew-steps {
      list-style: none;
      padding: 0;
    }

    .page-90oknew-steps li {
      background-color: var(--page-90oknew-light);
      border-left: 5px solid var(--page-90oknew-primary);
      margin-bottom: 15px;
      padding: 15px 20px;
      border-radius: 5px;
      box-shadow: var(--page-90oknew-shadow);
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .page-90oknew-steps li strong {
      color: var(--page-90oknew-secondary);
      font-size: 1.1em;
      min-width: 60px;
    }

    .page-90oknew-steps li span {
        flex-grow: 1;
        color: var(--page-90oknew-text-dark);
    }

    .page-90oknew-qr-code {
        text-align: center;
        margin-top: 20px;
    }
    .page-90oknew-qr-code img {
        max-width: 200px;
        height: auto;
        border: 5px solid var(--page-90oknew-primary);
        border-radius: 8px;
    }
    .page-90oknew-qr-code p {
        margin-top: 10px;
        font-weight: bold;
        color: var(--page-90oknew-dark);
    }

    .page-90oknew-faq {
      margin-top: 20px;
    }

    .page-90oknew-faq-item {
      margin-bottom: 15px;
      border-bottom: 1px solid #eee;
      padding-bottom: 10px;
    }

    .page-90oknew-faq-question {
      font-weight: bold;
      color: var(--page-90oknew-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 0;
    }

    .page-90oknew-faq-question::after {
      content: '+';
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-90oknew-faq-question.active::after {
      content: '-';
      transform: rotate(180deg);
    }

    .page-90oknew-faq-answer {
      display: none;
      padding: 10px 0 5px 0;
      color: #555;
    }

    .page-90oknew-list-item {
        margin-bottom: 10px;
        padding-left: 25px;
        position: relative;
    }

    .page-90oknew-list-item::before {
        content: '✓';
        color: var(--page-90oknew-secondary);
        font-weight: bold;
        position: absolute;
        left: 0;
        top: 0;
    }

    /* Floating Ad */
    .page-90oknew-floating-ad {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background-color: var(--page-90oknew-accent);
        color: var(--page-90oknew-text-light);
        padding: 15px 20px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        z-index: 1000;
        text-align: center;
        max-width: 280px;
        animation: page-90oknew-pulse 2s infinite;
    }

    .page-90oknew-floating-ad h4 {
        margin-top: 0;
        font-size: 1.2em;
        margin-bottom: 10px;
        color: var(--page-90oknew-text-light);
    }

    .page-90oknew-floating-ad .page-90oknew-button {
        background-color: var(--page-90oknew-primary);
        color: var(--page-90oknew-dark);
        padding: 8px 15px;
        font-size: 0.9em;
    }

    .page-90oknew-floating-ad .page-90oknew-button:hover {
        background-color: var(--page-90oknew-text-light);
    }

    @keyframes page-90oknew-pulse {
        0% { transform: scale(1); }
        50% { transform: scale(1.03); }
        100% { transform: scale(1); }
    }


    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-90oknew-header h1 {
        font-size: 2em;
      }
      .page-90oknew-header p {
        font-size: 1em;
      }
      .page-90oknew-section {
        padding: 15px;
        margin-bottom: 20px;
      }
      .page-90oknew-steps li {
          flex-direction: column;
          align-items: center;
          text-align: center;
      }
      .page-90oknew-steps li strong {
          margin-bottom: 5px;
      }
      .page-90oknew-floating-ad {
          bottom: 10px;
          right: 10px;
          max-width: 200px;
          padding: 10px 15px;
      }
      .page-90oknew-floating-ad h4 {
          font-size: 1em;
      }
      .page-90oknew-floating-ad .page-90oknew-button {
          font-size: 0.8em;
          padding: 6px 12px;
      }
    }

    @media (max-width: 480px) {
      .page-90oknew-header h1 {
        font-size: 1.8em;
      }
      .page-90oknew-grid {
        grid-template-columns: 1fr;
      }
    }