/* style/about.css */
/* body đã padding-top: var(--header-offset) từ shared.css; trang này không được thêm padding-top cho main hoặc các section đầu tiên */

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

.page-about {
  font-family: 'Arial', sans-serif;
  color: var(--netwin-text-main); /* Sử dụng màu chữ chính cho toàn bộ trang */
  background-color: var(--netwin-bg-dark); /* Màu nền chính của trang */
}

.page-about__section {
  padding: 80px 0;
  text-align: center;
}

.page-about__section-title {
  font-size: 2.8em;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--netwin-text-main);
  line-height: 1.2;
}

.page-about__section-title--light {
  color: var(--netwin-text-main);
}

.page-about__text-block {
  max-width: 900px;
  margin: 0 auto 40px auto;
  font-size: 1.1em;
  line-height: 1.8;
  color: var(--netwin-text-secondary);
}

.page-about__text-secondary {
  color: var(--netwin-text-secondary);
}

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

/* Hero Section */
.page-about__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0 60px 0; /* Chỉ 10px padding-top để tránh double spacing với body */
  overflow: hidden;
  background-color: var(--netwin-deep-green);
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  margin-bottom: 30px;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about__hero-content {
  max-width: 900px;
  padding: 0 20px;
  text-align: center;
  z-index: 1;
}

.page-about__main-title {
  font-weight: 800;
  line-height: 1.2;
  color: var(--netwin-text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  /* Không đặt font-size cố định quá lớn, dùng clamp nếu cần */
  font-size: clamp(2.5em, 5vw, 3.5em);
}

.page-about__subtitle {
  font-size: 1.2em;
  line-height: 1.7;
  color: var(--netwin-text-secondary);
  margin-bottom: 40px;
}

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

.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background: var(--netwin-button-gradient);
  color: var(--netwin-text-main);
  border: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

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

.page-about__btn-secondary:hover {
  background-color: var(--netwin-primary-color);
  color: var(--netwin-text-main);
  transform: translateY(-2px);
}

/* Card Styles */
.page-about__card {
  background-color: var(--netwin-card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height: 100%;
  border: 1px solid var(--netwin-border-color);
}

.page-about__card-title {
  font-size: 1.5em;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--netwin-text-main);
  line-height: 1.4;
}

.page-about__card-title--light {
  color: var(--netwin-text-main);
}

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

.page-about__card-image {
  width: 100%;
  height: auto;
  max-height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
}

/* Mission & Vision */
.page-about__mission-vision {
  background-color: var(--netwin-bg-dark);
}

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

/* Core Values */
.page-about__core-values {
  background-color: var(--netwin-deep-green);
}

.page-about__values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__value-card .page-about__card-image {
  height: 200px;
}

/* Why Choose Us */
.page-about__why-choose {
  background-color: var(--netwin-bg-dark);
}

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

.page-about__reason-card .page-about__card {
  text-align: left;
  background-color: var(--netwin-card-bg);
  padding: 25px;
  align-items: flex-start;
}

.page-about__reason-card .page-about__btn-secondary {
  margin-top: 20px;
}

.page-about__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-about__list-item {
  margin-bottom: 10px;
  font-size: 1em;
  line-height: 1.6;
  color: var(--netwin-text-secondary);
}

.page-about__list-item strong {
  color: var(--netwin-text-main);
}

/* Responsibility */
.page-about__responsibility {
  background-color: var(--netwin-deep-green);
}

.page-about__responsibility-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__responsibility-item .page-about__card {
  background-color: var(--netwin-card-bg);
  padding: 30px;
  align-items: flex-start;
}

.page-about__link-text {
  color: var(--netwin-secondary-color);
  text-decoration: none;
  font-weight: 600;
  margin-top: 15px;
  display: inline-block;
}

.page-about__link-text:hover {
  text-decoration: underline;
  color: var(--netwin-glow-color);
}

/* Contact & Join */
.page-about__contact-join {
  background-color: var(--netwin-bg-dark);
}

/* FAQ Section */
.page-about__faq-section {
  background-color: var(--netwin-deep-green);
}

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

.page-about__faq-item {
  background-color: var(--netwin-card-bg);
  border: 1px solid var(--netwin-border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  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 25px;
  font-size: 1.2em;
  font-weight: 600;
  color: var(--netwin-text-main);
  cursor: pointer;
  background-color: var(--netwin-card-bg);
  user-select: none;
  list-style: none; /* Hide default marker for details */
}

.page-about__faq-question::-webkit-details-marker {
  display: none; /* Hide default marker for details in WebKit */
}

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

.page-about__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 20px;
  color: var(--netwin-secondary-color);
}

.page-about__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 1em;
  line-height: 1.7;
  color: var(--netwin-text-secondary);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
}

.page-about__faq-item[open] .page-about__faq-answer {
  max-height: 500px; /* Adjust as needed for content length */
  padding: 0 25px 20px 25px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-about__section-title {
    font-size: 2.2em;
  }

  .page-about__main-title {
    font-size: clamp(2em, 4.5vw, 3em);
  }

  .page-about__subtitle {
    font-size: 1.1em;
  }

  .page-about__hero-section {
    padding: 10px 0 40px 0;
  }

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

@media (max-width: 768px) {
  .page-about {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-about__section-title {
    font-size: 1.8em;
  }

  .page-about__main-title {
    font-size: clamp(1.8em, 6vw, 2.5em);
  }

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

  .page-about__container,
  .page-about__hero-content {
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

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

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

  .page-about__hero-section {
    padding-top: 10px !important; /* body đã xử lý header-offset, chỉ cần padding nhỏ */
    padding-bottom: 30px;
  }

  .page-about__card-image,
  .page-about__hero-image,
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  
  .page-about__hero-image-wrapper,
  .page-about__section,
  .page-about__card,
  .page-about__container,
  .page-about__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }

  .page-about__card {
    padding: 20px !important;
  }

  .page-about__faq-question {
    font-size: 1.1em;
    padding: 15px 20px;
  }

  .page-about__faq-answer {
    padding: 0 20px 15px 20px;
  }
}