:root {
  --page-about-primary-color: #11A84E;
  --page-about-secondary-color: #22C768;
  --page-about-button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --page-about-card-bg: #11271B;
  --page-about-bg: #08160F;
  --page-about-text-main: #F2FFF6;
  --page-about-text-secondary: #A7D9B8;
  --page-about-border-color: #2E7A4E;
  --page-about-glow-color: #57E38D;
  --page-about-gold-color: #F2C14E;
  --page-about-divider-color: #1E3A2A;
  --page-about-deep-green-color: #0A4B2C;
}

.page-about {
  background-color: var(--page-about-bg);
  color: var(--page-about-text-main);
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

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

.page-about__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  padding-top: 10px; /* body đã xử lý padding-top: var(--header-offset) */
  text-align: center;
  position: relative;
  overflow: hidden;
  color: var(--page-about-text-main);
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-height: 700px; /* Giới hạn chiều cao cho hình ảnh hero */
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  min-width: 200px; /* Đảm bảo kích thước tối thiểu */
  min-height: 200px;
}

.page-about__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: bold;
  margin-bottom: 20px;
  color: var(--page-about-text-main);
  line-height: 1.2;
}

.page-about__lead-paragraph {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  margin-bottom: 30px;
  color: var(--page-about-text-secondary);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__cta-button {
  display: inline-block;
  padding: 15px 30px;
  background: var(--page-about-button-gradient);
  color: var(--page-about-text-main);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  min-width: 200px; /* Đảm bảo kích thước tối thiểu */
  min-height: 48px;
  box-sizing: border-box;
  white-space: normal; /* Cho phép xuống dòng */
  word-wrap: break-word;
}

.page-about__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-about__section-title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: bold;
  text-align: center;
  margin-bottom: 40px;
  color: var(--page-about-gold-color);
  position: relative;
}

.page-about__section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--page-about-primary-color);
  margin: 15px auto 0;
  border-radius: 2px;
}

.page-about__section-description {
  text-align: center;
  max-width: 800px;
  margin: -20px auto 60px;
  font-size: clamp(0.9rem, 1.2vw, 1.1rem);
  color: var(--page-about-text-secondary);
}

.page-about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.page-about__grid--2-cols {
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.page-about__grid--3-cols {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.page-about__card {
  background-color: var(--page-about-card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid var(--page-about-border-color);
  min-width: 200px;
  min-height: 200px;
}

.page-about__card-title {
  font-size: clamp(1.4rem, 2vw, 1.8rem);
  font-weight: bold;
  margin-bottom: 15px;
  color: var(--page-about-primary-color);
}

.page-about__card p {
  color: var(--page-about-text-secondary);
  font-size: clamp(0.9rem, 1.1vw, 1rem);
  flex-grow: 1;
}

.page-about__card-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 20px;
  object-fit: cover;
  min-width: 200px;
  min-height: 200px;
}

.page-about__link-button {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: var(--page-about-deep-green-color);
  color: var(--page-about-text-main);
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.3s ease;
  min-width: 150px;
  min-height: 38px;
  box-sizing: border-box;
  white-space: normal; /* Cho phép xuống dòng */
  word-wrap: break-word;
}

.page-about__link-button:hover {
  background-color: var(--page-about-primary-color);
}

.page-about__dark-section {
  background-color: var(--page-about-deep-green-color);
  padding: 80px 0;
  color: var(--page-about-text-main);
}

.page-about__dark-section .page-about__section-title {
  color: var(--page-about-gold-color);
}

.page-about__dark-section .page-about__section-title::after {
  background: var(--page-about-glow-color);
}

.page-about__timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 40px 0;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--page-about-divider-color);
  transform: translateX(-50%);
}

.page-about__timeline-item {
  display: flex;
  align-items: center;
  margin-bottom: 60px;
  position: relative;
}

.page-about__timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.page-about__timeline-item:nth-child(even) {
  flex-direction: row;
}

.page-about__timeline-item::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: var(--page-about-primary-color);
  border-radius: 50%;
  border: 4px solid var(--page-about-card-bg);
  z-index: 1;
}

.page-about__timeline-year {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--page-about-gold-color);
  width: 150px;
  text-align: center;
}

.page-about__timeline-description {
  flex-grow: 1;
  background-color: var(--page-about-card-bg);
  padding: 20px;
  border-radius: 8px;
  margin: 0 40px;
  color: var(--page-about-text-secondary);
  font-size: 1rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__timeline-item:nth-child(odd) .page-about__timeline-description {
  margin-right: 80px;
  text-align: right;
}

.page-about__timeline-item:nth-child(even) .page-about__timeline-description {
  margin-left: 80px;
  text-align: left;
}

.page-about__history-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin-top: 40px;
  object-fit: cover;
  min-width: 200px;
  min-height: 200px;
}

.page-about__team-member {
  padding: 20px;
}

.page-about__team-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 15px;
  border: 4px solid var(--page-about-primary-color);
  min-width: 200px;
  min-height: 200px;
}

.page-about__member-name {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--page-about-text-main);
  margin-bottom: 5px;
}

.page-about__member-position {
  font-size: 1rem;
  color: var(--page-about-gold-color);
  margin-bottom: 15px;
}

.page-about__member-description {
  font-size: 0.95rem;
  color: var(--page-about-text-secondary);
}

.page-about__faq-section {
  padding-bottom: 80px;
}

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

.page-about__faq-item {
  margin-bottom: 20px;
  text-align: left;
  padding: 0;
  overflow: hidden;
}

.page-about__faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 30px;
  background-color: var(--page-about-card-bg);
  border-bottom: 1px solid var(--page-about-divider-color);
  cursor: pointer;
  list-style: none; /* Remove default marker */
  color: var(--page-about-text-main);
  font-weight: bold;
  font-size: clamp(1.1rem, 1.5vw, 1.3rem);
  transition: background-color 0.3s ease;
}

.page-about__faq-item summary:hover {
  background-color: var(--page-about-deep-green-color);
}

.page-about__faq-item summary::-webkit-details-marker {
  display: none;
}

.page-about__faq-qtext {
  flex-grow: 1;
}

.page-about__faq-toggle {
  font-size: 1.8rem;
  line-height: 1;
  margin-left: 20px;
  color: var(--page-about-primary-color);
}

.page-about__faq-answer {
  padding: 20px 30px 30px;
  background-color: var(--page-about-card-bg);
  color: var(--page-about-text-secondary);
  font-size: 1rem;
}

.page-about__faq-answer p {
  margin: 0;
  color: var(--page-about-text-secondary);
}

/* Responsive Styles */
@media (max-width: 768px) {
  .page-about__container {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-about__hero-section {
    padding: 40px 15px;
    padding-top: 10px !important; /* body đã xử lý padding-top: var(--header-offset) */
  }

  .page-about__hero-image,
  .page-about__card-image,
  .page-about__history-image,
  .page-about__team-photo,
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
    min-width: 200px !important;
    min-height: 200px !important;
  }

  .page-about__cta-button,
  .page-about__link-button,
  .page-about a[class*="button"],
  .page-about a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about__grid {
    grid-template-columns: 1fr;
  }

  .page-about__grid--2-cols {
    grid-template-columns: 1fr;
  }

  .page-about__grid--3-cols {
    grid-template-columns: 1fr;
  }

  .page-about__timeline::before {
    left: 20px;
  }

  .page-about__timeline-item {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 40px;
  }

  .page-about__timeline-item::before {
    left: 20px;
    transform: translateX(0);
  }

  .page-about__timeline-year {
    width: auto;
    padding-left: 60px;
    text-align: left;
    margin-bottom: 10px;
  }

  .page-about__timeline-description {
    margin: 0 0 0 60px !important;
    text-align: left !important;
  }

  .page-about__timeline-item:nth-child(odd) .page-about__timeline-description {
    margin-right: 0 !important;
  }

  .page-about__team-photo {
    width: 120px;
    height: 120px;
    min-width: 120px !important;
    min-height: 120px !important;
  }

  .page-about__faq-item summary {
    padding: 15px 20px;
    font-size: 1rem;
  }

  .page-about__faq-answer {
    padding: 15px 20px 20px;
  }
}