/* style/about.css */
/* body đã padding-top: var(--header-offset) từ shared.css; trang này không cần thêm padding-top cho body hoặc hero section */

:root {
  --page-about-primary-color: #11A84E;
  --page-about-secondary-color: #22C768;
  --page-about-background-color: #08160F;
  --page-about-card-bg: #11271B;
  --page-about-text-main: #F2FFF6;
  --page-about-text-secondary: #A7D9B8;
  --page-about-border-color: #2E7A4E;
  --page-about-button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
}

.page-about {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--page-about-text-main); /* Sử dụng màu chữ chính cho nền tối */
  background-color: var(--page-about-background-color);
}

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

/* Hero Section */
.page-about__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  padding-top: 10px; /* Small top padding, body handles header offset */
  text-align: center;
  background-color: var(--page-about-background-color);
}

.page-about__hero-image {
  width: 100%;
  max-width: 1200px;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 30px;
}

.page-about__hero-content {
  max-width: 900px;
  z-index: 1;
  color: var(--page-about-text-main);
}

.page-about__main-title {
  font-size: clamp(2em, 4vw, 3.2em);
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--page-about-text-main);
  line-height: 1.2;
}

.page-about__description {
  font-size: clamp(1em, 1.5vw, 1.2em);
  margin-bottom: 30px;
  color: var(--page-about-text-secondary);
}

/* General Sections */
.page-about__introduction-section, 
.page-about__products-services-section, 
.page-about__responsibility-section, 
.page-about__cta-section {
  padding: 60px 0;
  background-color: #ffffff; /* Light background for these sections */
  color: #333333; /* Dark text for light background */
}

.page-about__team-tech-section, 
.page-about__safety-fairness-section, 
.page-about__faq-section {
  padding: 60px 0;
  background-color: var(--page-about-background-color); /* Dark background for these sections */
  color: var(--page-about-text-main); /* Light text for dark background */
}

.page-about__section-title {
  font-size: clamp(1.8em, 3.5vw, 2.5em);
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: inherit; /* Inherit color from parent section */
}

.page-about__text-block {
  font-size: 1.1em;
  margin-bottom: 20px;
  line-height: 1.8;
  text-align: justify;
}

.page-about__image-content {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  margin: 30px auto;
  border-radius: 10px;
  object-fit: cover;
}

/* Buttons */
.page-about__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.page-about__btn-primary,
.page-about__btn-secondary,
.page-about__btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background: var(--page-about-button-gradient);
  color: var(--page-about-text-main);
  border: 2px solid transparent;
}

.page-about__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-about__btn-secondary {
  background: #ffffff;
  color: var(--page-about-primary-color);
  border: 2px solid var(--page-about-primary-color);
}

.page-about__btn-secondary:hover {
  background: var(--page-about-primary-color);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-about__btn-link {
  background: none;
  color: var(--page-about-primary-color);
  border: 2px solid var(--page-about-primary-color);
  padding: 10px 20px;
  font-size: 1em;
}

.page-about__btn-link:hover {
  background: var(--page-about-primary-color);
  color: #ffffff;
}

/* Team & Tech Section */
.page-about__tech-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-about__feature-card {
  background-color: var(--page-about-card-bg);
  color: var(--page-about-text-main);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-about__card-image {
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
}

.page-about__card-title {
  font-size: 1.5em;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--page-about-text-main);
}

.page-about__card-text {
  font-size: 1em;
  color: var(--page-about-text-secondary);
  line-height: 1.7;
}

/* Products & Services Section */
.page-about__product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__product-card {
  background-color: var(--page-about-card-bg);
  color: var(--page-about-text-main);
  padding: 25px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__product-card .page-about__card-image {
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 15px;
}

.page-about__product-card .page-about__card-title a {
  color: var(--page-about-text-main);
  text-decoration: none;
  font-size: 1.3em;
  font-weight: 600;
  margin-bottom: 10px;
}

.page-about__product-card .page-about__card-title a:hover {
  color: var(--page-about-primary-color);
}

.page-about__product-card .page-about__card-text {
  font-size: 0.95em;
  color: var(--page-about-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 20px;
}

/* Safety & Fairness Section */
.page-about__commitment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__commitment-item {
  text-align: center;
  background-color: var(--page-about-card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-about__item-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  object-fit: contain;
  margin-bottom: 20px;
}

.page-about__item-title {
  font-size: 1.4em;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--page-about-text-main);
}

.page-about__item-text {
  font-size: 0.95em;
  color: var(--page-about-text-secondary);
  line-height: 1.6;
}

/* Responsibility Section */
.page-about__responsibility-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

.page-about__list-item {
  background-color: #f8f8f8;
  border-left: 5px solid var(--page-about-primary-color);
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 5px;
  font-size: 1.05em;
  line-height: 1.7;
  color: #333333;
}

.page-about__list-item strong {
  color: var(--page-about-primary-color);
}

/* FAQ Section */
.page-about__faq-list {
  margin-top: 40px;
}

.page-about__faq-item {
  background-color: var(--page-about-card-bg);
  color: var(--page-about-text-main);
  margin-bottom: 15px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  font-size: 1.2em;
  font-weight: 600;
  cursor: pointer;
  background-color: var(--page-about-card-bg);
  color: var(--page-about-text-main);
  border-bottom: 1px solid var(--page-about-border-color);
  list-style: none; /* Hide default marker for details */
}

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

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

.page-about__faq-toggle {
  font-size: 1.5em;
  margin-left: 15px;
  transition: transform 0.3s ease;
}

.page-about__faq-item[open] .page-about__faq-toggle {
  transform: rotate(45deg);
}

.page-about__faq-answer {
  padding: 20px;
  font-size: 1em;
  line-height: 1.7;
  color: var(--page-about-text-secondary);
  border-top: 1px solid var(--page-about-border-color);
}

.page-about__faq-answer p {
  margin-bottom: 15px;
}

.page-about__faq-answer .page-about__btn-link {
  margin-top: 10px;
}

/* Call to Action Section */
.page-about__cta-section {
  text-align: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-about__hero-image {
    max-width: 1000px;
  }
}

@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,
  .page-about__introduction-section,
  .page-about__team-tech-section,
  .page-about__products-services-section,
  .page-about__safety-fairness-section,
  .page-about__responsibility-section,
  .page-about__faq-section,
  .page-about__cta-section {
    padding: 40px 0;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-about__hero-section {
    padding-top: 10px !important;
  }

  .page-about__main-title {
    font-size: 2em;
  }

  .page-about__description {
    font-size: 1em;
  }

  .page-about__section-title {
    font-size: 1.8em;
    margin-bottom: 30px;
  }

  .page-about__text-block {
    font-size: 1em;
    text-align: left;
  }

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

  .page-about__btn-primary,
  .page-about__btn-secondary,
  .page-about__btn-link {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 20px;
    font-size: 1em;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
    box-sizing: border-box !important;
  }
  
  .page-about__hero-image,
  .page-about__image-content,
  .page-about__card-image,
  .page-about__item-icon {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }

  .page-about__product-grid,
  .page-about__commitment-grid,
  .page-about__tech-features {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about__feature-card,
  .page-about__product-card,
  .page-about__commitment-item,
  .page-about__list-item,
  .page-about__faq-item {
    padding: 20px;
  }

  .page-about__faq-question {
    font-size: 1.1em;
  }

  .page-about__faq-answer {
    font-size: 0.95em;
  }
}

@media (max-width: 480px) {
  .page-about__main-title {
    font-size: 1.8em;
  }

  .page-about__section-title {
    font-size: 1.5em;
  }
}