:root {
      --page-sin88-primary-bg: #1a1a2e;
      --page-sin88-secondary-bg: #2d2d44;
      --page-sin88-accent-color: #e94560;
      --page-sin88-text-light: #f0f0f0;
      --page-sin88-text-dark: #cccccc;
      --page-sin88-link-color: #66ccff;
      --page-sin88-border-color: #4a4a66;
      --page-sin88-button-hover-bg: #c93450;
    }

    .page-sin88 {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-sin88-primary-bg);
      color: var(--page-sin88-text-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-sin88 .page-sin88-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 15px;
    }

    .page-sin88-section {
      padding: 40px 0;
      text-align: center;
    }

    .page-sin88-section-dark {
      background-color: var(--page-sin88-secondary-bg);
    }

    .page-sin88 h1, .page-sin88 h2, .page-sin88 h3 {
      color: var(--page-sin88-accent-color);
      margin-bottom: 20px;
      font-weight: bold;
    }

    .page-sin88 h1 {
      font-size: 2.5em;
    }

    .page-sin88 h2 {
      font-size: 2em;
      border-bottom: 2px solid var(--page-sin88-accent-color);
      display: inline-block;
      padding-bottom: 10px;
      margin-bottom: 30px;
    }

    .page-sin88 h3 {
      font-size: 1.5em;
    }

    .page-sin88 p {
      margin-bottom: 15px;
      color: var(--page-sin88-text-dark);
    }

    .page-sin88 a {
      color: var(--page-sin88-link-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-sin88 a:hover {
      color: var(--page-sin88-accent-color);
    }

    .page-sin88-button {
      display: inline-block;
      background-color: var(--page-sin88-accent-color);
      color: var(--page-sin88-text-light);
      padding: 12px 25px;
      border-radius: 8px;
      text-transform: uppercase;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-sin88-button:hover {
      background-color: var(--page-sin88-button-hover-bg);
      transform: translateY(-2px);
    }

    /* Banner Section */
    .page-sin88-hero {
      background: linear-gradient(rgba(26, 26, 46, 0.8), rgba(26, 26, 46, 0.8)), url('[GALLERY:banner:sin88,khuyenmai,dangnhap,2025]') no-repeat center center/cover;
      padding: 80px 15px 40px; /* Adjust padding for banner content below image */
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 400px;
      text-align: center;
      position: relative;
    }

    .page-sin88-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5); /* Overlay to make text readable */
      z-index: 1;
    }

    .page-sin88-hero > * {
      position: relative;
      z-index: 2;
    }

    .page-sin88-hero h1 {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-sin88-text-light);
      text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    }

    .page-sin88-hero p {
      font-size: 1.1em;
      max-width: 800px;
      margin: 0 auto 30px;
      color: var(--page-sin88-text-dark);
    }

    /* Floating Login Button */
    .page-sin88-floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-sin88-accent-color);
      color: var(--page-sin88-text-light);
      padding: 15px 25px;
      border-radius: 50px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      text-decoration: none;
      animation: page-sin88-pulse 1.5s infinite;
    }

    .page-sin88-floating-button:hover {
      background-color: var(--page-sin88-button-hover-bg);
      transform: scale(1.05);
      animation: none;
    }

    @keyframes page-sin88-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Game Categories */
    .page-sin88-game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-sin88-game-card {
      background-color: var(--page-sin88-primary-bg);
      border: 1px solid var(--page-sin88-border-color);
      border-radius: 10px;
      overflow: hidden;
      text-align: center;
      padding: 15px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      align-items: center;
    }

    .page-sin88-game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 15px rgba(0, 0, 0, 0.4);
    }

    .page-sin88-game-card img {
      max-width: 100%;
      height: 120px;
      object-fit: contain;
      border-radius: 8px;
      margin-bottom: 15px;
    }

    .page-sin88-game-card h3 {
      font-size: 1.1em;
      margin-bottom: 10px;
      color: var(--page-sin88-text-light);
    }

    .page-sin88-game-card .page-sin88-button-small {
      padding: 8px 15px;
      font-size: 0.9em;
      border-radius: 5px;
    }

    /* Features Section */
    .page-sin88-features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
      text-align: left;
    }

    .page-sin88-feature-item {
      background-color: var(--page-sin88-primary-bg);
      border: 1px solid var(--page-sin88-border-color);
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-sin88-feature-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    .page-sin88-feature-item h3 {
      color: var(--page-sin88-accent-color);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
    }

    .page-sin88-feature-item h3 svg {
      margin-right: 10px;
      color: var(--page-sin88-link-color);
    }

    /* Promotion Section */
    .page-sin88-promotion-card {
      background-color: var(--page-sin88-primary-bg);
      border: 1px solid var(--page-sin88-border-color);
      border-radius: 10px;
      padding: 25px;
      margin: 20px auto;
      max-width: 800px;
      text-align: left;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-sin88-promotion-card h3 {
      color: var(--page-sin88-link-color);
      margin-bottom: 15px;
    }

    .page-sin88-promotion-card ul {
      list-style: disc;
      padding-left: 20px;
      color: var(--page-sin88-text-dark);
      margin-bottom: 20px;
    }

    .page-sin88-promotion-card li {
      margin-bottom: 8px;
    }

    /* How-to Section */
    .page-sin88-steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
      margin-top: 30px;
      text-align: left;
    }

    .page-sin88-step-item {
      background-color: var(--page-sin88-primary-bg);
      border: 1px solid var(--page-sin88-border-color);
      border-radius: 10px;
      padding: 20px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-sin88-step-item .step-number {
      font-size: 2em;
      color: var(--page-sin88-accent-color);
      font-weight: bold;
      margin-bottom: 10px;
    }

    .page-sin88-step-item h3 {
      margin-top: 0;
      color: var(--page-sin88-link-color);
    }

    /* FAQ Section */
    .page-sin88-faq-item {
      background-color: var(--page-sin88-primary-bg);
      border: 1px solid var(--page-sin88-border-color);
      border-radius: 10px;
      margin-bottom: 15px;
      text-align: left;
      overflow: hidden;
    }

    .page-sin88-faq-question {
      padding: 18px 25px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      color: var(--page-sin88-text-light);
      background-color: var(--page-sin88-secondary-bg);
      transition: background-color 0.3s ease;
    }

    .page-sin88-faq-question:hover {
      background-color: #3a3a55;
    }

    .page-sin88-faq-question span {
      font-size: 1.2em;
    }

    .page-sin88-faq-answer {
      padding: 0 25px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.5s ease-out, padding 0.5s ease-out;
      background-color: var(--page-sin88-primary-bg);
      color: var(--page-sin88-text-dark);
    }

    .page-sin88-faq-answer p {
      padding-top: 15px;
      padding-bottom: 15px;
      margin: 0;
    }

    .page-sin88-faq-item.active .page-sin88-faq-answer {
      max-height: 200px; /* Adjust as needed */
      padding-top: 15px;
      padding-bottom: 15px;
    }

    .page-sin88-faq-question .icon {
      transition: transform 0.3s ease;
    }

    .page-sin88-faq-item.active .page-sin88-faq-question .icon {
      transform: rotate(180deg);
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-sin88 h1 {
        font-size: 2em;
      }
      .page-sin88 h2 {
        font-size: 1.6em;
      }
      .page-sin88-hero {
        padding: 60px 15px 30px;
        min-height: 350px;
      }
      .page-sin88-floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 1em;
      }
      .page-sin88-game-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }
      .page-sin88-feature-item, .page-sin88-step-item {
        padding: 20px;
      }
    }

    @media (max-width: 480px) {
      .page-sin88 h1 {
        font-size: 1.8em;
      }
      .page-sin88 h2 {
        font-size: 1.4em;
      }
      .page-sin88-hero {
        padding: 40px 10px 20px;
        min-height: 300px;
      }
      .page-sin88-floating-button {
        bottom: 10px;
        right: 10px;
        padding: 10px 18px;
        font-size: 0.9em;
      }
      .page-sin88-game-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }