:root {
  --km288b-primary: #113B7A;
  --km288b-secondary: #1D5FD1;
  --km288b-button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --km288b-card-bg: #10233F;
  --km288b-text-main: #F3F8FF;
  --km288b-text-secondary: #AFC4E8;
  --km288b-border: #244D84;
  --km288b-glow: #4FA8FF;
  --km288b-gold: #F2C14E;
  --km288b-divider: #1B3357;
  --km288b-deep-navy: #08162B; /* Body background from shared.css */
}

.page-contact {
  font-family: 'Arial', sans-serif;
  color: var(--km288b-text-main); /* Default text color for the page */
  background-color: var(--km288b-deep-navy); /* Ensure consistency with body background */
}

/* Hero Section */
.page-contact__hero-section {
  position: relative;
  padding-top: 10px; /* Small top padding, assuming body handles header offset */
  padding-bottom: 40px;
  text-align: center;
  overflow: hidden;
  background-color: var(--km288b-deep-navy);
}

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

.page-contact__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover; /* Default for desktop, will change for mobile */
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

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

.page-contact__main-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem); /* Using clamp for responsive font size */
  font-weight: 700;
  color: var(--km288b-gold);
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(242, 193, 78, 0.5);
}

.page-contact__intro-text {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--km288b-text-secondary);
  max-width: 900px;
  margin: 0 auto 30px;
}

.page-contact__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: 100%; /* Ensure container takes full width */
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-contact__btn-primary,
.page-contact__btn-secondary,
.page-contact__btn-small,
.page-contact__btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%; /* Ensure button responsiveness */
  box-sizing: border-box;
  white-space: normal; /* Allow text wrapping */
  word-wrap: break-word; /* Allow text wrapping */
}

.page-contact__btn-primary {
  background: var(--km288b-button-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 15px rgba(43, 115, 246, 0.4);
}

.page-contact__btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(43, 115, 246, 0.6);
}

.page-contact__btn-secondary {
  background: var(--km288b-deep-navy);
  color: var(--km288b-gold);
  border: 2px solid var(--km288b-gold);
  box-shadow: 0 4px 15px rgba(242, 193, 78, 0.2);
}

.page-contact__btn-secondary:hover {
  transform: translateY(-3px);
  background: var(--km288b-gold);
  color: var(--km288b-deep-navy);
  box-shadow: 0 6px 20px rgba(242, 193, 78, 0.4);
}

/* General Section Styling */
.page-contact__section {
  padding: 60px 20px;
  background-color: var(--km288b-deep-navy);
  border-top: 1px solid var(--km288b-divider);
}

.page-contact__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--km288b-gold);
  text-align: center;
  margin-bottom: 20px;
  text-shadow: 0 0 8px rgba(242, 193, 78, 0.3);
}

.page-contact__section-description {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--km288b-text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

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

/* Channels Section */
.page-contact__channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.page-contact__channel-card {
  background-color: var(--km288b-card-bg);
  border: 1px solid var(--km288b-border);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: var(--km288b-text-main);
  max-width: 100%;
  box-sizing: border-box;
}

.page-contact__channel-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), 0 0 15px var(--km288b-glow);
}

.page-contact__channel-icon {
  width: 100%;
  max-width: 200px; /* Min size 200px, so 300x200 is fine */
  height: auto;
  margin: 0 auto 20px;
  display: block;
  object-fit: contain;
  border-radius: 8px;
}

.page-contact__channel-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--km288b-text-main);
  margin-bottom: 15px;
}

.page-contact__channel-text {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--km288b-text-secondary);
  margin-bottom: 25px;
}

.page-contact__btn-small {
  padding: 10px 20px;
  font-size: 0.9rem;
  background: var(--km288b-button-gradient);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-contact__btn-small:hover {
  transform: translateY(-2px);
  box-shadow: 0 3px 10px rgba(43, 115, 246, 0.3);
}

/* Guide Section */
.page-contact__guide-section {
  background-color: var(--km288b-deep-navy);
}

.page-contact__guide-steps {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.page-contact__guide-item {
  background-color: var(--km288b-card-bg);
  border: 1px solid var(--km288b-border);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  color: var(--km288b-text-main);
}

.page-contact__guide-heading {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--km288b-gold);
  margin-bottom: 15px;
}

.page-contact__guide-text {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--km288b-text-secondary);
}

.page-contact__guide-text ul {
  list-style-type: disc;
  padding-left: 25px;
  margin-top: 10px;
}

.page-contact__guide-text li {
  margin-bottom: 8px;
}

/* Common Issues Section */
.page-contact__common-issues-section {
  background-color: var(--km288b-deep-navy);
}

.page-contact__issues-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  max-width: 1200px;
  margin: 0 auto;
}

.page-contact__issue-card {
  background-color: var(--km288b-card-bg);
  border: 1px solid var(--km288b-border);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: var(--km288b-text-main);
  max-width: 100%;
  box-sizing: border-box;
}

.page-contact__issue-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25), 0 0 10px var(--km288b-primary);
}

.page-contact__issue-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--km288b-gold);
  margin-bottom: 12px;
}

.page-contact__issue-text {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--km288b-text-secondary);
  margin-bottom: 20px;
}

.page-contact__btn-link {
  display: inline-flex;
  align-items: center;
  color: var(--km288b-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.page-contact__btn-link:hover {
  color: var(--km288b-glow);
  text-decoration: underline;
}

/* FAQ Section */
.page-contact__faq-section {
  background-color: var(--km288b-deep-navy);
}

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

details.page-contact__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid var(--km288b-border);
  overflow: hidden;
  background: var(--km288b-card-bg);
  color: var(--km288b-text-main);
}
details.page-contact__faq-item summary.page-contact__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--km288b-text-main);
}
details.page-contact__faq-item summary.page-contact__faq-question::-webkit-details-marker {
  display: none;
}
details.page-contact__faq-item summary.page-contact__faq-question:hover {
  background: rgba(var(--km288b-primary), 0.1);
}
.page-contact__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--km288b-gold);
}
.page-contact__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--km288b-glow);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-contact__faq-item .page-contact__faq-answer {
  padding: 0 25px 20px;
  background: var(--km288b-deep-navy);
  border-radius: 0 0 8px 8px;
  color: var(--km288b-text-secondary);
}

.page-contact__faq-answer p {
  margin: 0;
  padding-top: 10px;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Final CTA Section */
.page-contact__final-cta-section {
  padding: 80px 20px;
  text-align: center;
  background-color: var(--km288b-primary); /* Use primary color for strong CTA */
  color: #ffffff; /* Ensure light text on dark background */
  border-top: 1px solid var(--km288b-divider);
}

.page-contact__final-cta-section .page-contact__content-wrapper {
  background-color: var(--km288b-card-bg); /* Use card background for inner content */
  padding: 50px 30px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.page-contact__section-title--light {
  color: var(--km288b-gold); /* Gold title on dark background */
  text-shadow: 0 0 10px rgba(242, 193, 78, 0.5);
}

.page-contact__section-description--light {
  color: var(--km288b-text-secondary);
}

/* All images responsive */
.page-contact img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Mobile responsive styles (Max-width 1024px for tablets) */
@media (max-width: 1024px) {
  .page-contact__main-title {
    font-size: clamp(2rem, 5vw, 3rem);
  }
  .page-contact__intro-text {
    font-size: 1rem;
  }
  .page-contact__section-title {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
  }
  .page-contact__section-description {
    font-size: 0.95rem;
  }
  .page-contact__channels-grid,
  .page-contact__issues-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
  }
}

/* Mobile responsive styles (Max-width 768px for phones) */
@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-contact__hero-section {
    padding-top: 10px; /* Small top padding for mobile */
    padding-bottom: 30px;
  }
  .page-contact__hero-image-wrapper {
    margin-bottom: 20px;
  }
  .page-contact__hero-image {
    object-fit: contain !important; /* Prevent cropping on mobile */
    aspect-ratio: unset;
    width: 100% !important;
    height: auto !important;
  }
  .page-contact__hero-content {
    padding: 0 15px;
  }
  .page-contact__main-title {
    font-size: clamp(1.8rem, 7vw, 2.2rem);
    margin-bottom: 15px;
  }
  .page-contact__intro-text {
    font-size: 0.95rem;
    margin-bottom: 25px;
  }

  /* 按钮与按钮容器 */
  .page-contact__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }
  .page-contact__btn-primary,
  .page-contact__btn-secondary,
  .page-contact__btn-small,
  .page-contact__btn-link,
  .page-contact a[class*="button"],
  .page-contact 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;
  }

  /* 通用图片与容器 */
  .page-contact img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-contact__section,
  .page-contact__card,
  .page-contact__container,
  .page-contact__content-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* Sản phẩm/Dịch vụ/Kênh liên hệ/Vấn đề thường gặp (grid layouts) */
  .page-contact__channels-grid,
  .page-contact__issues-grid {
    grid-template-columns: 1fr; /* Single column layout for mobile */
    gap: 20px;
  }

  /* Tiêu đề chính và khu vực SEO dài */
  .page-contact__section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    text-align: center;
    margin-bottom: 15px;
  }
  .page-contact__section-description {
    font-size: 0.9rem;
    margin-bottom: 30px;
  }
  .page-contact__guide-heading {
    font-size: 1.4rem;
  }
  .page-contact__issue-title {
    font-size: 1.2rem;
  }
  .page-contact__guide-item,
  .page-contact__channel-card,
  .page-contact__issue-card {
    padding: 20px;
  }

  /* FAQ Section */
  details.page-contact__faq-item summary.page-contact__faq-question { padding: 15px; }
  .page-contact__faq-qtext { font-size: 1rem; }
  .page-contact__faq-toggle { font-size: 20px; width: 24px; }
  details.page-contact__faq-item .page-contact__faq-answer { padding: 0 15px 15px; }
  .page-contact__faq-answer p { font-size: 0.9rem; }

  /* Final CTA Section */
  .page-contact__final-cta-section {
    padding: 50px 15px;
  }
  .page-contact__final-cta-section .page-contact__content-wrapper {
    padding: 30px 20px;
  }
}