:root {
      --primary-color: #e44d26; /* Một màu cam đỏ nổi bật */
      --secondary-color: #333;
      --accent-color: #f7b731; /* Màu vàng cam */
      --text-color: #333;
      --light-text-color: #fff;
      --background-light: #f4f4f4;
      --background-dark: #222;
      --border-radius: 8px;
      --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      --header-offset: 122px; /* Default value if not set by shared.css */
    }

    /* Base styles for the page container */
    .page-13win-ng-nh-p {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--text-color);
      background-color: var(--background-light);
      padding-top: 10px; /* Small decorative padding, relying on body padding for header offset */
      padding-bottom: 80px; /* Space for floating buttons */
    }

    .page-13win-ng-nh-p__section {
      padding: 40px 20px;
      margin-bottom: 20px;
      background-color: #fff;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow);
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-13win-ng-nh-p__section--dark {
      background-color: var(--background-dark);
      color: var(--light-text-color);
      box-shadow: none;
    }

    .page-13win-ng-nh-p__container {
      max-width: 960px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-13win-ng-nh-p__title {
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.5em;
      font-weight: bold;
    }

    .page-13win-ng-nh-p__subtitle {
      color: var(--secondary-color);
      text-align: center;
      margin-bottom: 20px;
      font-size: 1.8em;
    }

    .page-13win-ng-nh-p__text-center {
      text-align: center;
    }

    .page-13win-ng-nh-p__button-group {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-top: 30px;
      flex-wrap: wrap;
    }

    .page-13win-ng-nh-p__button {
      display: inline-block;
      background-color: var(--primary-color);
      color: var(--light-text-color);
      padding: 12px 25px;
      border-radius: var(--border-radius);
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-13win-ng-nh-p__button:hover {
      background-color: #c0392b;
      transform: translateY(-2px);
    }

    .page-13win-ng-nh-p__button--secondary {
      background-color: var(--secondary-color);
    }

    .page-13win-ng-nh-p__button--secondary:hover {
      background-color: #555;
    }

    /* Hero Section */
    .page-13win-ng-nh-p__hero-section {
      background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('[GALLERY:hero:1920x1080:casino,gaming,login,13win]') no-repeat center center/cover;
      color: var(--light-text-color);
      text-align: center;
      padding: 80px 20px;
      border-radius: var(--border-radius);
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 400px;
    }

    .page-13win-ng-nh-p__hero-section h1 {
      font-size: 3.5em;
      margin-bottom: 20px;
      color: var(--accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
      line-height: 1.2;
    }

    .page-13win-ng-nh-p__hero-section p {
      font-size: 1.2em;
      max-width: 800px;
      margin: 0 auto 30px auto;
    }

    /* Floating Buttons */
    .page-13win-ng-nh-p__floating-buttons {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background-color: rgba(0, 0, 0, 0.85);
      padding: 10px 0;
      display: flex;
      justify-content: space-around;
      align-items: center;
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
      z-index: 1000;
    }

    .page-13win-ng-nh-p__floating-button {
      flex: 1;
      text-align: center;
      background-color: var(--primary-color);
      color: var(--light-text-color);
      padding: 12px 0;
      margin: 0 5px;
      border-radius: var(--border-radius);
      font-weight: bold;
      font-size: 1.1em;
      cursor: pointer;
      transition: background-color 0.3s ease;
      border: none;
      max-width: 150px; /* Limit width on larger screens */
    }

    .page-13win-ng-nh-p__floating-button:hover {
      background-color: #c0392b;
    }

    /* Login Steps */
    .page-13win-ng-nh-p__steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-13win-ng-nh-p__step-item {
      background-color: var(--background-light);
      padding: 25px;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow);
      text-align: center;
      transition: transform 0.3s ease;
      box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-13win-ng-nh-p__step-item:hover {
      transform: translateY(-5px);
    }

    .page-13win-ng-nh-p__step-item h3 {
      color: var(--primary-color);
      font-size: 1.5em;
      margin-bottom: 15px;
    }

    .page-13win-ng-nh-p__step-item p {
      color: var(--secondary-color);
    }

    /* Product Display */
    .page-13win-ng-nh-p__product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
      justify-content: center; /* Center items if they don't fill the grid */
    }

    .page-13win-ng-nh-p__product-item {
      background-color: var(--background-light);
      border-radius: var(--border-radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      text-align: center;
      transition: transform 0.3s ease;
      box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-13win-ng-nh-p__product-item:hover {
      transform: translateY(-5px);
    }

    .page-13win-ng-nh-p__product-item img {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      border-bottom: 1px solid #eee;
    }

    .page-13win-ng-nh-p__product-item h3 {
      color: var(--primary-color);
      font-size: 1.3em;
      padding: 15px 10px;
      margin: 0;
    }

    /* FAQ Section */
    .page-13win-ng-nh-p__faq-list {
      margin-top: 30px;
    }

    .page-13win-ng-nh-p__faq-item {
      background-color: var(--background-light);
      border: 1px solid #ddd;
      border-radius: var(--border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-13win-ng-nh-p__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 20px;
      background-color: #f9f9f9;
      cursor: pointer;
      user-select: none;
      font-weight: bold;
      color: var(--secondary-color);
      transition: background-color 0.3s ease;
    }

    .page-13win-ng-nh-p__faq-question:hover {
      background-color: #f0f0f0;
    }

    .page-13win-ng-nh-p__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      color: var(--primary-color);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-13win-ng-nh-p__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      transition: transform 0.3s ease;
      color: var(--primary-color);
      pointer-events: none; /* Prevent toggle icon from blocking click event */
    }

    .page-13win-ng-nh-p__faq-item.active .page-13win-ng-nh-p__faq-toggle {
      transform: rotate(45deg); /* Plus sign becomes a cross */
    }

    .page-13win-ng-nh-p__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--text-color);
    }

    .page-13win-ng-nh-p__faq-item.active .page-13win-ng-nh-p__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 20px !important;
      opacity: 1;
    }

    .page-13win-ng-nh-p__faq-answer p {
      margin-top: 0;
      margin-bottom: 10px;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-13win-ng-nh-p__hero-section {
        padding: 60px 15px;
        min-height: 300px;
      }

      .page-13win-ng-nh-p__hero-section h1 {
        font-size: 2.5em;
      }

      .page-13win-ng-nh-p__hero-section p {
        font-size: 1em;
      }

      .page-13win-ng-nh-p__title {
        font-size: 2em;
        margin-bottom: 20px;
      }

      .page-13win-ng-nh-p__subtitle {
        font-size: 1.5em;
      }

      .page-13win-ng-nh-p__section {
        padding: 30px 15px;
        margin-bottom: 15px;
      }

      .page-13win-ng-nh-p__button-group {
        flex-direction: column;
        gap: 15px;
      }

      .page-13win-ng-nh-p__button {
        width: 100%;
        max-width: 300px; /* Limit width for larger mobile devices */
        margin: 0 auto;
        padding: 10px 20px;
      }

      /* Floating buttons */
      .page-13win-ng-nh-p__floating-buttons {
        padding: 8px 0;
      }

      .page-13win-ng-nh-p__floating-button {
        font-size: 1em;
        padding: 10px 0;
        margin: 0 3px;
        max-width: 120px;
      }

      /* List item responsive */
      .page-13win-ng-nh-p__steps-grid,
      .page-13win-ng-nh-p__product-grid {
        grid-template-columns: 1fr; /* Single column */
        gap: 20px;
      }

      .page-13win-ng-nh-p__step-item,
      .page-13win-ng-nh-p__product-item,
      .page-13win-ng-nh-p__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-13win-ng-nh-p__faq-question {
        padding: 15px;
      }

      .page-13win-ng-nh-p__faq-question h3 {
        font-size: 1em;
      }

      .page-13win-ng-nh-p__faq-answer {
        padding: 0 15px;
      }

      .page-13win-ng-nh-p__faq-item.active .page-13win-ng-nh-p__faq-answer {
        padding: 15px 15px !important;
      }

      /* Image responsive */
      .page-13win-ng-nh-p__product-item img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
    }