/* style/about.css */
/* body 已 padding-top: var(--header-offset)；页面禁止再写该变量 */
.page-about {
  color: var(--text-main, #F2FFF6); /* Default text color for the page */
  font-family: 'Arial', sans-serif; /* Example font */
  line-height: 1.6;
  background-color: var(--background, #08160F); /* Ensure page background matches custom color */
}

.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 already handles --header-offset */
  background-color: var(--background, #08160F);
  overflow: hidden;
}

.page-about__hero-content-wrapper {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column; /* Image above, text below */
  align-items: center;
  gap: 30px;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  display: block;
}

.page-about__hero-text-block {
  text-align: center;
  max-width: 800px;
  color: var(--text-main, #F2FFF6);
}

.page-about__main-title {
  font-size: clamp(2em, 4vw, 3.5em); /* Use clamp for H1 */
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--gold, #F2C14E); /* Using Gold for H1 for emphasis */
}

.page-about__lead-paragraph {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: var(--text-secondary, #A7D9B8);
}

.page-about__cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
}

.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1em;
  transition: all 0.3s ease;
  min-width: 150px;
  text-align: center;
  box-sizing: border-box;
}

.page-about__btn-primary {
  background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  color: #ffffff; /* White text on dark gradient */
  border: 2px solid transparent;
}

.page-about__btn-primary:hover {
  background: linear-gradient(180deg, #13994A 0%, #2AD16F 100%);
  box-shadow: 0 0 15px rgba(42, 209, 111, 0.6);
}

.page-about__btn-secondary {
  background: #ffffff;
  color: var(--primary-color, #11A84E);
  border: 2px solid var(--primary-color, #11A84E);
}

.page-about__btn-secondary:hover {
  background: var(--primary-color, #11A84E);
  color: #ffffff;
  box-shadow: 0 0 15px rgba(17, 168, 78, 0.6);
}

.page-about__section {
  padding: 80px 20px;
  background-color: var(--background, #08160F);
  color: var(--text-main, #F2FFF6);
}

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

.page-about__container--flex {
  display: flex;
  align-items: center;
  gap: 50px;
}

.page-about__container--flex-reverse {
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  gap: 50px;
}

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

.page-about__section-title {
  font-size: clamp(1.8em, 3vw, 2.8em);
  font-weight: 700;
  margin-bottom: 40px;
  text-align: center;
  color: var(--gold, #F2C14E);
}

.page-about__introduction p,
.page-about__text-block p,
.page-about__history p,
.page-about__products p,
.page-about__security-commitment p,
.page-about__social-responsibility p {
  margin-bottom: 20px;
  color: var(--text-secondary, #A7D9B8);
}

.page-about__image-block {
  flex: 1;
  min-width: 300px;
}

.page-about__image-block img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  display: block;
}

.page-about__text-block {
  flex: 1;
  min-width: 300px;
}

.page-about__value-list,
.page-about__security-features,
.page-about__responsibility-list {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}

.page-about__value-list li,
.page-about__security-features li,
.page-about__responsibility-list li {
  background-color: var(--card-bg, #11271B);
  margin-bottom: 10px;
  padding: 15px 20px;
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  color: var(--text-main, #F2FFF6);
}

.page-about__value-list li strong,
.page-about__security-features li strong,
.page-about__responsibility-list li strong {
  color: var(--gold, #F2C14E);
  margin-right: 10px;
  flex-shrink: 0;
}

.page-about__value-list li::before,
.page-about__security-features li::before,
.page-about__responsibility-list li::before {
  content: '✓'; /* Checkmark icon */
  color: var(--glow, #57E38D);
  font-weight: bold;
  margin-right: 10px;
}

.page-about__milestones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.page-about__milestone-item {
  background-color: var(--card-bg, #11271B);
  padding: 25px;
  border-radius: 10px;
  border-left: 5px solid var(--primary-color, #11A84E);
  color: var(--text-main, #F2FFF6);
}

.page-about__milestone-year {
  font-size: 1.8em;
  color: var(--gold, #F2C14E);
  margin-bottom: 10px;
}

.page-about__milestone-description {
  font-size: 0.95em;
  color: var(--text-secondary, #A7D9B8);
}

.page-about__history-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    object-fit: cover;
    margin-top: 30px;
    display: block;
}

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

.page-about__product-card {
  background-color: var(--card-bg, #11271B);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.page-about__product-card img {
  width: 100%;
  height: 200px; /* Fixed height for consistency */
  object-fit: cover;
  display: block;
}

.page-about__product-title {
  font-size: 1.3em;
  font-weight: 600;
  margin: 20px 20px 10px;
  color: var(--gold, #F2C14E);
}

.page-about__product-title a {
  color: inherit;
  text-decoration: none;
}

.page-about__product-title a:hover {
  text-decoration: underline;
  color: var(--glow, #57E38D);
}

.page-about__product-description {
  font-size: 0.95em;
  color: var(--text-secondary, #A7D9B8);
  padding: 0 20px 20px;
  flex-grow: 1; /* Push content to bottom */
}

.page-about__cta-buttons--center {
  margin-top: 40px;
}

.page-about__security-commitment .page-about__text-block a {
    color: var(--glow, #57E38D);
    text-decoration: none;
    font-weight: 600;
}

.page-about__security-commitment .page-about__text-block a:hover {
    text-decoration: underline;
}

.page-about__faq-section {
  background-color: var(--deep-green, #0A4B2C); /* Different background for FAQ section */
}

.page-about__faq-list {
  margin-top: 40px;
}

.page-about__faq-item {
  background-color: var(--card-bg, #11271B);
  border: 1px solid var(--border, #2E7A4E);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-about__faq-item summary {
  list-style: none; /* Hide default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.1em;
  font-weight: 600;
  color: var(--text-main, #F2FFF6);
  cursor: pointer;
  outline: none;
  position: relative;
}

.page-about__faq-item summary::-webkit-details-marker {
  display: none; /* Hide default marker for webkit browsers */
}

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

.page-about__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 15px;
  color: var(--glow, #57E38D);
  transition: transform 0.3s ease;
}

.page-about__faq-item[open] .page-about__faq-toggle {
  transform: rotate(45deg); /* Rotate '+' to 'x' or similar for open state */
}

.page-about__faq-answer {
  padding: 0 25px 18px;
  font-size: 0.95em;
  color: var(--text-secondary, #A7D9B8);
}

.page-about__faq-answer p {
  margin: 0;
}

.page-about__cta-bottom .page-about__section-title {
    margin-bottom: 20px;
}

.page-about__cta-bottom p {
    max-width: 800px;
    margin: 0 auto 30px auto;
    color: var(--text-secondary, #A7D9B8);
}


/* Responsive styles */
@media (max-width: 1024px) {
  .page-about__container--flex,
  .page-about__container--flex-reverse {
    flex-direction: column;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .page-about__section {
    padding: 40px 15px;
  }

  .page-about__hero-section {
    padding: 30px 15px;
    padding-top: 10px;
  }

  .page-about__main-title {
    font-size: clamp(1.8em, 8vw, 2.5em);
  }

  .page-about__lead-paragraph {
    font-size: 1em;
  }

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

  .page-about__btn-primary,
  .page-about__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    padding-left: 15px;
    padding-right: 15px;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-about__section-title {
    font-size: clamp(1.5em, 7vw, 2em);
    margin-bottom: 30px;
  }

  /* Images responsive */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  /* All containers with images/buttons */
  .page-about__section,
  .page-about__card,
  .page-about__container,
  .page-about__hero-content-wrapper,
  .page-about__cta-buttons,
  .page-about__milestones,
  .page-about__product-grid {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important; /* Prevent horizontal scroll */
  }

  .page-about__product-card img {
     /* Adjust height for mobile if needed */
  }
}

@media (max-width: 480px) {
  .page-about__milestones,
  .page-about__product-grid {
    grid-template-columns: 1fr;
  }
}