/* Tổng quan */
    .page-vin77 {
      font-family: 'Arial', sans-serif;
      color: #333;
      line-height: 1.6;
      background-color: #f4f7f6;
      padding-bottom: 80px; /* Khoảng trống cho nút nổi */
    }

    /* Hero Section */
    .page-vin77__hero-section {
      position: relative;
      background-color: #0d1a26; /* Nền tối hơn cho banner */
      color: #fff;
      text-align: center;
      padding-top: 10px; /* Đảm bảo không bị che bởi header */
      padding-bottom: 50px; /* Padding dưới cho nội dung */
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-vin77__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      object-fit: cover;
      opacity: 0.8; /* Làm mờ ảnh nền một chút để chữ nổi bật */
    }

    .page-vin77__hero-content {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 90%;
      max-width: 800px;
      padding: 20px;
      background-color: rgba(0, 0, 0, 0.5);
      border-radius: 10px;
      box-sizing: border-box;
    }

    .page-vin77__hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      color: #ffcc00; /* Vàng nổi bật */
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-vin77__hero-description {
      font-size: 1.1em;
      margin-bottom: 20px;
    }

    .page-vin77__hero-button {
      display: inline-block;
      background-color: #e44d26; /* Màu cam đỏ */
      color: #fff;
      padding: 12px 25px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    }

    .page-vin77__hero-button:hover {
      background-color: #f06a42;
    }

    /* Floating Button */
    .page-vin77__floating-button {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: #007bff; /* Màu xanh dương */
      color: #fff;
      padding: 15px 25px;
      border-radius: 50px;
      text-align: center;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.3s ease;
      white-space: nowrap; /* Ngăn nút bị ngắt dòng */
      animation: page-vin77__pulse 2s infinite;
    }

    .page-vin77__floating-button:hover {
      background-color: #0056b3;
      transform: translateX(-50%) scale(1.05);
    }

    @keyframes page-vin77__pulse {
      0% {
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
      }
      70% {
        box-shadow: 0 0 0 15px rgba(0, 123, 255, 0);
      }
      100% {
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0);
      }
    }

    /* Content Sections */
    .page-vin77__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      margin-bottom: 30px;
    }

    .page-vin77__section-title {
      font-size: 2em;
      color: #0d1a26;
      text-align: center;
      margin-bottom: 30px;
      position: relative;
    }

    .page-vin77__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: #e44d26;
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-vin77__text-content {
      font-size: 1.05em;
      margin-bottom: 20px;
      text-align: justify;
    }

    /* Game Categories */
    .page-vin77__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-vin77__game-card {
      background-color: #f9f9f9;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
    }

    .page-vin77__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-vin77__game-card-image {
      width: 100%;
      height: 200px; /* Fixed height for consistency */
      object-fit: cover;
      display: block;
      max-width: 100%;
    }

    .page-vin77__game-card-content {
      padding: 20px;
    }

    .page-vin77__game-card-title {
      font-size: 1.4em;
      color: #0d1a26;
      margin-bottom: 10px;
    }

    .page-vin77__game-card-description {
      font-size: 0.95em;
      color: #555;
      margin-bottom: 15px;
    }

    /* Promotions */
    .page-vin77__promo-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 25px;
    }

    .page-vin77__promo-card {
      background-color: #e0f7fa; /* Màu xanh nhạt */
      border-left: 5px solid #00bcd4; /* Viền nổi bật */
      border-radius: 8px;
      padding: 25px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .page-vin77__promo-icon {
      width: 80px;
      height: 80px;
      object-fit: contain;
      flex-shrink: 0;
      max-width: 100%;
    }

    .page-vin77__promo-content h3 {
      font-size: 1.5em;
      color: #00796b; /* Màu xanh đậm */
      margin-bottom: 8px;
    }

    .page-vin77__promo-content p {
      font-size: 1em;
      color: #333;
    }

    /* How-to Guide */
    .page-vin77__step-list {
      list-style: none;
      padding: 0;
      counter-reset: step-counter;
    }

    .page-vin77__step-item {
      background-color: #f0f8ff; /* Màu xanh rất nhạt */
      border: 1px solid #cceeff;
      border-radius: 8px;
      padding: 20px 25px;
      margin-bottom: 15px;
      display: flex;
      align-items: flex-start;
      gap: 15px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-vin77__step-item::before {
      counter-increment: step-counter;
      content: counter(step-counter);
      display: flex;
      justify-content: center;
      align-items: center;
      width: 35px;
      height: 35px;
      border-radius: 50%;
      background-color: #007bff;
      color: #fff;
      font-weight: bold;
      font-size: 1.1em;
      flex-shrink: 0;
    }

    .page-vin77__step-item h3 {
      font-size: 1.3em;
      color: #0d1a26;
      margin-top: 0;
      margin-bottom: 5px;
    }

    .page-vin77__step-item p {
      font-size: 1em;
      color: #555;
    }

    /* FAQ Section */
    .page-vin77__faq-container {
      margin-top: 30px;
    }

    .page-vin77__faq-item {
      background-color: #fff;
      border: 1px solid #eee;
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    }

    .page-vin77__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      background-color: #f0f0f0;
      border-bottom: 1px solid #eee;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-vin77__faq-question:hover {
      background-color: #e9e9e9;
    }

    .page-vin77__faq-question h3 {
      margin: 0;
      font-size: 1.15em;
      color: #0d1a26;
      flex-grow: 1;
      text-align: left;
      pointer-events: none; /* Prevent h3 from blocking click on parent */
    }

    .page-vin77__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: #e44d26;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click on parent */
    }

    .page-vin77__faq-item.active .page-vin77__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
      content: '−'; /* Change to minus sign */
    }

    .page-vin77__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px; /* Initial padding 0 */
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: #555;
      font-size: 1em;
      line-height: 1.8;
      background-color: #fafafa;
    }

    .page-vin77__faq-item.active .page-vin77__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 15px !important; /* Final padding */
      opacity: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-vin77__hero-section {
        padding-top: 10px; /* Mobile header padding */
        padding-bottom: 30px;
      }
      .page-vin77__hero-title {
        font-size: 1.8em;
      }
      .page-vin77__hero-description {
        font-size: 1em;
      }
      .page-vin77__hero-content {
        width: 95%;
        padding: 15px;
      }

      .page-vin77__section {
        padding: 30px 15px;
      }

      .page-vin77__section-title {
        font-size: 1.7em;
      }

      .page-vin77__game-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
      }

      .page-vin77__promo-card {
        flex-direction: column;
        text-align: center;
        padding: 20px;
      }

      .page-vin77__promo-icon {
        margin-bottom: 15px;
      }

      .page-vin77__step-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
      }
      .page-vin77__step-item::before {
        margin-bottom: 10px;
      }

      .page-vin77__faq-question {
        padding: 12px 15px;
      }
      .page-vin77__faq-question h3 {
        font-size: 1em;
      }
      .page-vin77__faq-toggle {
        font-size: 1.3em;
      }
      .page-vin77__faq-answer {
        padding: 0 15px; /* Ensure initial padding is 0 */
      }
      .page-vin77__faq-item.active .page-vin77__faq-answer {
        padding: 15px 15px !important; /* Adjusted padding for mobile */
      }

      /* Image responsive optimization */
      img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-vin77__game-card-image,
      .page-vin77__promo-icon {
        max-width: 100% !important;
        height: auto !important;
      }
    }

    @media (max-width: 480px) {
      .page-vin77__floating-button {
        font-size: 1em;
        padding: 12px 20px;
        bottom: 15px;
        width: calc(100% - 40px); /* Adjust width for smaller screens */
      }
      .page-vin77__hero-title {
        font-size: 1.5em;
      }
    }