.page-about {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333333;
  background-color: #f8f8f8;
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-about__section {
  padding: 60px 0;
  text-align: center;
}

.page-about__dark-section {
  background-color: #1A202C;
  color: #ffffff;
}

.page-about__light-bg {
  background-color: #ffffff;
  color: #333333;
}

.page-about__heading {
  font-size: 36px;
  color: #1A202C;
  margin-bottom: 20px;
  font-weight: bold;
}

.page-about__dark-section .page-about__heading {
  color: #FFD700;
}

.page-about__heading--center {
  text-align: center;
}

.page-about__text-block {
  font-size: 18px;
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto 40px auto;
  text-align: center;
}

.page-about__dark-section .page-about__text-block {
  color: #f0f0f0;
}

.page-about__text-block--center {
  text-align: center;
}

/* Hero Section */
.page-about__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  padding-top: var(--header-offset, 120px);
  background: linear-gradient(135deg, #1A202C, #3A4750);
  overflow: hidden;
}

.page-about__hero-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.page-about__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
  max-width: 800px;
  margin-bottom: 40px;
}

.page-about__hero-title {
  font-size: 48px;
  font-weight: bold;
  color: #FFD700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-about__hero-description {
  font-size: 20px;
  color: #f0f0f0;
  margin-bottom: 40px;
  line-height: 1.6;
}

.page-about__hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-about__cta-button {
  display: inline-block;
  padding: 15px 40px;
  text-decoration: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  transition: all 0.3s ease;
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
}

.page-about__btn-primary {
  background: #FFD700;
  color: #1A202C;
  border: 2px solid #FFD700;
}

.page-about__btn-primary:hover {
  background: #e0b800;
  border-color: #e0b800;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.page-about__btn-secondary {
  background: transparent;
  color: #FFD700;
  border: 2px solid #FFD700;
}

.page-about__btn-secondary:hover {
  background: #FFD700;
  color: #1A202C;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-width: 1000px;
  margin-top: 40px;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* Mission & Vision Section */
.page-about__mission-vision {
  padding-bottom: 30px;
}

.page-about__values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  text-align: center;
}

.page-about__value-item {
  background: #ffffff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__value-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.page-about__value-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  margin-bottom: 25px;
  border-radius: 8px;
  object-fit: cover;
}

.page-about__value-title {
  font-size: 24px;
  color: #1A202C;
  margin-bottom: 15px;
  font-weight: 700;
}

.page-about__value-description {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
}

/* Why Choose Section */
.page-about__why-choose {
  background-color: #fefefe;
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about__features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__feature-card {
  background: #f8f8f8;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #e0e0e0;
}

.page-about__feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.page-about__feature-title {
  font-size: 22px;
  color: #1A202C;
  margin-bottom: 15px;
  font-weight: 700;
}

.page-about__feature-description {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
}

/* Ecosystem Section */
.page-about__ecosystem {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about__game-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.page-about__category-card {
  background: #2A3342;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.page-about__category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

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

.page-about__category-title {
  font-size: 22px;
  color: #FFD700;
  margin: 20px 0 10px 0;
  font-weight: 700;
}

.page-about__category-title a {
  color: #FFD700;
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about__category-title a:hover {
  color: #e0b800;
  text-decoration: underline;
}

.page-about__category-description {
  font-size: 15px;
  color: #f0f0f0;
  padding: 0 20px 25px 20px;
  line-height: 1.6;
  flex-grow: 1;
}

/* Security & Responsibility Section */
.page-about__security-responsibility {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about__security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  text-align: left;
}

.page-about__security-item {
  background: #ffffff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  border: 1px solid #e0e0e0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about__security-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.page-about__security-title {
  font-size: 22px;
  color: #1A202C;
  margin-bottom: 15px;
  font-weight: 700;
}

.page-about__security-description {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
}

.page-about__security-description a {
  color: #FFD700;
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about__security-description a:hover {
  color: #e0b800;
  text-decoration: underline;
}

/* Future Vision Section */
.page-about__future-vision {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about__future-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  text-align: center;
}

.page-about__future-item {
  background: #2A3342;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__future-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.page-about__future-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  margin-bottom: 25px;
  border-radius: 8px;
  object-fit: cover;
}

.page-about__future-title {
  font-size: 24px;
  color: #FFD700;
  margin-bottom: 15px;
  font-weight: 700;
}

.page-about__future-description {
  font-size: 16px;
  color: #f0f0f0;
  line-height: 1.7;
}

/* Contact Section */
.page-about__contact {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about__contact-info {
  font-size: 18px;
  margin-bottom: 30px;
  line-height: 2;
  color: #333333;
}

.page-about__contact-info a {
  color: #1A202C;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

.page-about__contact-info a:hover {
  color: #FFD700;
  text-decoration: underline;
}

.page-about__contact-button {
  display: inline-block;
  margin-top: 20px;
}

/* FAQ Section */
.page-about__faq-section {
  padding-top: 80px;
  padding-bottom: 80px;
  text-align: left;
}

.page-about__faq-list {
  max-width: 900px;
  margin: 40px auto 0 auto;
}

/* FAQ容器样式 */
.page-about__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* FAQ默认状态 - 答案隐藏 */
.page-about__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
  padding: 0 20px;
  opacity: 0;
  background: #2A3342;
  color: #f0f0f0;
}

/* FAQ展开状态 - 🚨 使用!important和足够大的max-height确保一定能展开 */
.page-about__faq-item.active .page-about__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng !important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px !important;
  opacity: 1;
  border-radius: 0 0 8px 8px;
}

/* 问题样式 */
.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: #1A202C;
  border: 1px solid #3A4750;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-about__faq-question:hover {
  background: #2A3342;
  border-color: #4A5B6E;
}

.page-about__faq-question:active {
  background: #3A4750;
}

/* 问题标题样式 */
.page-about__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: #FFD700;
  pointer-events: none; /* 防止h3标签阻止点击事件 */
}

/* 切换图标 */
.page-about__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  line-height: 1;
  color: #FFD700;
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* 防止图标阻止点击事件 */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.page-about__faq-item.active .page-about__faq-toggle {
  color: #ffffff;
  transform: rotate(45deg);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-about__hero-title {
    font-size: 42px;
  }

  .page-about__hero-description {
    font-size: 18px;
  }

  .page-about__heading {
    font-size: 32px;
  }

  .page-about__text-block {
    font-size: 17px;
  }
}

@media (max-width: 768px) {
  .page-about__section {
    padding: 40px 0;
  }

  .page-about__hero-section {
    padding-top: var(--header-offset, 120px) !important;
    padding-bottom: 40px;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-about__hero-title {
    font-size: 32px;
    margin-bottom: 15px;
  }

  .page-about__hero-description {
    font-size: 16px;
    margin-bottom: 30px;
  }

  .page-about__hero-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .page-about__cta-button {
    max-width: 100% !important;
    width: 100% !important;
    padding: 12px 25px;
    font-size: 16px;
  }

  .page-about__hero-image-wrapper {
    margin-top: 30px;
  }

  .page-about__hero-image {
    border-radius: 8px;
  }

  .page-about__heading {
    font-size: 28px;
  }

  .page-about__text-block {
    font-size: 16px;
    margin-bottom: 30px;
  }

  .page-about__values-grid,
  .page-about__features-grid,
  .page-about__game-categories,
  .page-about__security-grid,
  .page-about__future-grid {
    grid-template-columns: 1fr;
    gap: 25px;
    margin-top: 30px;
  }

  .page-about__value-item,
  .page-about__feature-card,
  .page-about__category-card,
  .page-about__security-item,
  .page-about__future-item {
    padding: 25px;
    border-radius: 8px;
  }

  .page-about__value-title,
  .page-about__feature-title,
  .page-about__category-title,
  .page-about__security-title,
  .page-about__future-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .page-about__value-description,
  .page-about__feature-description,
  .page-about__category-description,
  .page-about__security-description,
  .page-about__future-description {
    font-size: 15px;
  }

  .page-about__category-image {
    height: 180px;
  }

  .page-about__faq-question {
    padding: 15px;
  }
  
  .page-about__faq-question h3 {
    font-size: 16px;
  }
  
  .page-about__faq-toggle {
    font-size: 24px;
    width: 28px;
    height: 28px;
  }

  .page-about__faq-item.active .page-about__faq-answer {
    padding: 15px !important;
  }

  /* Ensure all images are responsive */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  .page-about__section,
  .page-about__card,
  .page-about__container,
  .page-about__values-grid,
  .page-about__features-grid,
  .page-about__game-categories,
  .page-about__security-grid,
  .page-about__future-grid,
  .page-about__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  
  .page-about__hero-buttons,
  .page-about__button-group,
  .page-about__btn-container {
    flex-wrap: wrap !important;
    gap: 10px;
  }
}