:root {
      --primary-color: #e44d26; /* Cam đậm */
      --secondary-color: #ff7f50; /* Cam nhạt hơn */
      --accent-color: #ffd700; /* Vàng */
      --dark-bg: #1a1a1a; /* Nền tối */
      --light-text: #ffffff; /* Chữ sáng */
      --gray-text: #cccccc; /* Chữ xám */
      --border-color: #333333; /* Màu viền */
      --button-hover-bg: #c23b1e;
      --button-shadow: rgba(0, 0, 0, 0.3);
      --section-padding-y: 60px;
    }

    body {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--light-text);
      background-color: var(--dark-bg);
    }

    .page-555-win-apk {
      max-width: 1200px;
      margin: 0 auto;
      padding: 10px 15px; /* Small padding-top as body padding-top is assumed */
      box-sizing: border-box;
    }

    .page-555-win-apk__section {
      padding: var(--section-padding-y) 0;
      text-align: center;
      position: relative;
    }

    .page-555-win-apk__section--dark {
      background-color: #222222;
    }

    .page-555-win-apk__title {
      font-size: 2.8em;
      color: var(--primary-color);
      margin-bottom: 20px;
      text-transform: uppercase;
      font-weight: bold;
    }

    .page-555-win-apk__subtitle {
      font-size: 1.8em;
      color: var(--accent-color);
      margin-bottom: 30px;
      font-weight: normal;
    }

    .page-555-win-apk__text {
      font-size: 1.1em;
      color: var(--gray-text);
      margin-bottom: 25px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-555-win-apk__button {
      display: inline-block;
      background-color: var(--primary-color);
      color: var(--light-text);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px var(--button-shadow);
    }

    .page-555-win-apk__button:hover {
      background-color: var(--button-hover-bg);
      transform: translateY(-2px);
    }

    .page-555-win-apk__image {
      max-width: 100%;
      height: auto;
      border-radius: 10px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
      margin: 30px auto;
      display: block;
      object-fit: cover;
    }

    .page-555-win-apk__image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    /* Hero Section */
    .page-555-win-apk__hero-section {
      background: linear-gradient(135deg, #0f0f0f, #2a2a2a);
      padding: calc(var(--section-padding-y) + 10px) 0 var(--section-padding-y) 0; /* Adding 10px for hero-specific top padding */
      position: relative;
      overflow: hidden;
    }

    .page-555-win-apk__hero-content {
      position: relative;
      z-index: 1;
    }

    /* Floating Buttons */
    .page-555-win-apk__floating-buttons {
      position: fixed;
      top: 50%;
      right: 15px;
      transform: translateY(-50%);
      display: flex;
      flex-direction: column;
      gap: 15px;
      z-index: 1000;
    }

    .page-555-win-apk__floating-button {
      background-color: var(--primary-color);
      color: var(--light-text);
      padding: 12px 18px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.2s ease;
      white-space: nowrap;
      text-align: center;
    }

    .page-555-win-apk__floating-button--login {
      background-color: var(--accent-color);
      color: #333333;
    }

    .page-555-win-apk__floating-button:hover {
      background-color: var(--button-hover-bg);
      transform: scale(1.05);
    }

    .page-555-win-apk__floating-button--login:hover {
      background-color: #e6b800;
    }

    /* Features Section */
    .page-555-win-apk__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-555-win-apk__feature-item {
      background-color: #2a2a2a;
      padding: 30px;
      border-radius: 10px;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, background-color 0.3s ease;
      border: 1px solid var(--border-color);
    }

    .page-555-win-apk__feature-item:hover {
      transform: translateY(-5px);
      background-color: #333333;
    }

    .page-555-win-apk__feature-icon {
      width: 80px;
      height: 80px;
      margin-bottom: 20px;
      object-fit: contain;
      border-radius: 5px;
    }

    .page-555-win-apk__feature-title {
      font-size: 1.4em;
      color: var(--primary-color);
      margin-bottom: 15px;
    }

    .page-555-win-apk__feature-description {
      color: var(--gray-text);
      font-size: 0.95em;
    }

    /* How-to Section */
    .page-555-win-apk__steps-list {
      display: flex;
      flex-direction: column;
      gap: 40px;
      margin-top: 40px;
    }

    .page-555-win-apk__step-item {
      display: flex;
      align-items: center;
      text-align: left;
      background-color: #2a2a2a;
      border-radius: 10px;
      padding: 25px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--border-color);
    }

    .page-555-win-apk__step-item:nth-child(even) {
      flex-direction: row-reverse;
    }

    .page-555-win-apk__step-number {
      font-size: 2.5em;
      font-weight: bold;
      color: var(--primary-color);
      margin-right: 20px;
      flex-shrink: 0;
    }

    .page-555-win-apk__step-item:nth-child(even) .page-555-win-apk__step-number {
      margin-right: 0;
      margin-left: 20px;
    }

    .page-555-win-apk__step-content {
      flex-grow: 1;
    }

    .page-555-win-apk__step-title {
      font-size: 1.5em;
      color: var(--accent-color);
      margin-bottom: 10px;
    }

    .page-555-win-apk__step-description {
      color: var(--gray-text);
      font-size: 1em;
    }

    .page-555-win-apk__step-image {
      width: 40%;
      max-width: 400px;
      margin-left: 30px;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      object-fit: cover;
    }

    .page-555-win-apk__step-item:nth-child(even) .page-555-win-apk__step-image {
      margin-left: 0;
      margin-right: 30px;
    }

    /* Game Products */
    .page-555-win-apk__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-555-win-apk__game-card {
      background-color: #2a2a2a;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid var(--border-color);
    }

    .page-555-win-apk__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-555-win-apk__game-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .page-555-win-apk__game-content {
      padding: 20px;
    }

    .page-555-win-apk__game-title {
      font-size: 1.3em;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

    .page-555-win-apk__game-description {
      color: var(--gray-text);
      font-size: 0.9em;
    }

    /* Promotions */
    .page-555-win-apk__promotion-list {
      list-style: none;
      padding: 0;
      margin-top: 40px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
    }

    .page-555-win-apk__promotion-item {
      background-color: #2a2a2a;
      padding: 25px;
      border-radius: 10px;
      text-align: left;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      border-left: 5px solid var(--accent-color);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .page-555-win-apk__promotion-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
    }

    .page-555-win-apk__promotion-title {
      font-size: 1.4em;
      color: var(--accent-color);
      margin-bottom: 10px;
    }

    .page-555-win-apk__promotion-description {
      color: var(--gray-text);
      font-size: 1em;
    }

    /* Payment and Providers */
    .page-555-win-apk__brand-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .page-555-win-apk__brand-card {
      background-color: #2a2a2a;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 120px;
      border: 1px solid var(--border-color);
    }

    .page-555-win-apk__brand-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-555-win-apk__brand-logo {
      max-width: 100%;
      height: auto;
      max-height: 60px;
      object-fit: contain;
      margin-bottom: 10px;
    }

    .page-555-win-apk__brand-name {
      font-size: 0.9em;
      color: var(--gray-text);
      font-weight: bold;
      text-align: center;
    }

    /* FAQ Section */
    .page-555-win-apk__faq-container {
      margin-top: 40px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-555-win-apk__faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      background-color: #2a2a2a;
    }

    .page-555-win-apk__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 25px;
      background-color: var(--primary-color);
      color: var(--light-text);
      cursor: pointer;
      font-size: 1.15em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-555-win-apk__faq-question:hover {
      background-color: var(--button-hover-bg);
    }

    .page-555-win-apk__faq-question h3 {
      margin: 0;
      color: inherit;
      font-size: 1em; /* Override default h3 size */
      pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-555-win-apk__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      pointer-events: none; /* Prevent toggle icon from blocking click */
    }

    .page-555-win-apk__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      color: var(--gray-text);
      background-color: #333333;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      text-align: left;
      font-size: 1em;
    }

    .page-555-win-apk__faq-item.active .page-555-win-apk__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* Call to Action */
    .page-555-win-apk__cta-section {
      background-color: var(--primary-color);
      padding: var(--section-padding-y) 0;
      color: var(--light-text);
    }

    .page-555-win-apk__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      color: var(--light-text);
    }

    .page-555-win-apk__cta-text {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-555-win-apk__cta-button {
      background-color: var(--accent-color);
      color: #333333;
      padding: 18px 40px;
      font-size: 1.3em;
      border-radius: 50px;
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    }

    .page-555-win-apk__cta-button:hover {
      background-color: #e6b800;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-555-win-apk {
        padding: 10px 10px;
      }

      .page-555-win-apk__title {
        font-size: 2em;
      }

      .page-555-win-apk__subtitle {
        font-size: 1.4em;
      }

      .page-555-win-apk__text {
        font-size: 1em;
      }

      .page-555-win-apk__button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-555-win-apk__floating-buttons {
        top: auto;
        bottom: 15px;
        right: 50%;
        transform: translateX(50%);
        flex-direction: row;
        gap: 10px;
        width: calc(100% - 30px);
        justify-content: center;
      }

      .page-555-win-apk__floating-button {
        padding: 10px 15px;
        font-size: 0.9em;
        flex-grow: 1;
      }

      .page-555-win-apk__features-grid,
      .page-555-win-apk__game-grid,
      .page-555-win-apk__promotion-list,
      .page-555-win-apk__brand-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .page-555-win-apk__step-item {
        flex-direction: column;
        text-align: center;
        padding: 20px;
      }

      .page-555-win-apk__step-item:nth-child(even) {
        flex-direction: column;
      }

      .page-555-win-apk__step-number {
        margin-right: 0;
        margin-bottom: 15px;
      }

      .page-555-win-apk__step-item:nth-child(even) .page-555-win-apk__step-number {
        margin-left: 0;
        margin-bottom: 15px;
      }

      .page-555-win-apk__step-image {
        width: 100%;
        margin: 20px 0 0 0;
      }

      .page-555-win-apk__step-item:nth-child(even) .page-555-win-apk__step-image {
        margin: 20px 0 0 0;
      }

      .page-555-win-apk__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }

      .page-555-win-apk__faq-answer {
        padding: 0 20px;
      }

      .page-555-win-apk__faq-item.active .page-555-win-apk__faq-answer {
        padding: 15px 20px !important;
      }

      .page-555-win-apk__cta-title {
        font-size: 2em;
      }

      .page-555-win-apk__cta-text {
        font-size: 1em;
      }

      .page-555-win-apk__cta-button {
        padding: 15px 30px;
        font-size: 1.1em;
      }

      /* Ensure all list items and images are responsive */
      .page-555-win-apk__features-grid > *,
      .page-555-win-apk__game-grid > *,
      .page-555-win-apk__promotion-list > *,
      .page-555-win-apk__brand-grid > * {
        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-555-win-apk__image,
      .page-555-win-apk__feature-icon,
      .page-555-win-apk__step-image,
      .page-555-win-apk__game-image,
      .page-555-win-apk__brand-logo {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-555-win-apk__image-container {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }
    }