.page-doi-tac-va-lien-ket {
  font-family: 'Arial', sans-serif;
  color: #F3F8FF; /* Text Main */
  background-color: #08162B; /* Deep Navy from body, dark background */
  line-height: 1.6;
}

.page-doi-tac-va-lien-ket__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.page-doi-tac-va-lien-ket__hero-section {
  position: relative;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
  padding-bottom: 50px;
  text-align: center;
  color: #F3F8FF;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.page-doi-tac-va-lien-ket__hero-image-wrapper {
  width: 100%;
  max-height: 600px; /* Limit height for desktop */
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 30px;
}

.page-doi-tac-va-lien-ket__hero-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-doi-tac-va-lien-ket__hero-content {
  position: relative; /* Ensure content is above image if z-index is set */
  max-width: 900px;
  padding: 0 20px;
}

.page-doi-tac-va-lien-ket__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 20px;
  color: #F2C14E; /* Gold */
  line-height: 1.2;
  text-shadow: 0 0 10px rgba(79, 168, 255, 0.5); /* Glow */
}

.page-doi-tac-va-lien-ket__hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: 30px;
  color: #AFC4E8; /* Text Secondary */
}

.page-doi-tac-va-lien-ket__section {
  padding: 60px 0;
  position: relative;
}

.page-doi-tac-va-lien-ket__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: #F2C14E; /* Gold */
  text-align: center;
  margin-bottom: 40px;
  text-shadow: 0 0 8px rgba(79, 168, 255, 0.3); /* Glow */
}

.page-doi-tac-va-lien-ket__text-block {
  font-size: 1.05rem;
  margin-bottom: 20px;
  color: #F3F8FF; /* Text Main */
  text-align: justify;
}

.page-doi-tac-va-lien-ket__grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.page-doi-tac-va-lien-ket__card {
  background-color: #10233F; /* Card BG */
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid #244D84; /* Border */
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #F3F8FF; /* Text Main */
}

.page-doi-tac-va-lien-ket__card-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  object-fit: cover;
  display: block;
}

.page-doi-tac-va-lien-ket__card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #F2C14E; /* Gold */
}

.page-doi-tac-va-lien-ket__card-description {
  font-size: 1rem;
  color: #AFC4E8; /* Text Secondary */
  flex-grow: 1;
}

.page-doi-tac-va-lien-ket__list {
  list-style: none;
  padding: 0;
  margin-top: 20px;
  text-align: left;
  width: 100%;
}

.page-doi-tac-va-lien-ket__list li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  color: #F3F8FF; /* Text Main */
}

.page-doi-tac-va-lien-ket__list li::before {
  content: '✓';
  color: #F2C14E; /* Gold */
  position: absolute;
  left: 0;
  font-weight: bold;
}

.page-doi-tac-va-lien-ket__btn-primary {
  display: inline-block;
  padding: 15px 30px;
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); /* Button color */
  color: #ffffff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-doi-tac-va-lien-ket__btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  opacity: 0.9;
}

.page-doi-tac-va-lien-ket__cta-buttons {
  text-align: center;
  margin-top: 40px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-doi-tac-va-lien-ket__process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.page-doi-tac-va-lien-ket__step-card {
  padding: 30px;
}

.page-doi-tac-va-lien-ket__step-number {
  display: inline-flex;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #1D5FD1; /* Auxiliary color */
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: 700;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-doi-tac-va-lien-ket__step-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: #F2C14E; /* Gold */
  margin-bottom: 10px;
}

.page-doi-tac-va-lien-ket__step-description {
  font-size: 0.95rem;
  color: #AFC4E8; /* Text Secondary */
}

/* FAQ Styles */
details.page-doi-tac-va-lien-ket__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid #244D84; /* Border */
  overflow: hidden;
  background: #10233F; /* Card BG */
}
details.page-doi-tac-va-lien-ket__faq-item summary.page-doi-tac-va-lien-ket__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: #F3F8FF; /* Text Main */
}
details.page-doi-tac-va-lien-ket__faq-item summary.page-doi-tac-va-lien-ket__faq-question::-webkit-details-marker {
  display: none;
}
details.page-doi-tac-va-lien-ket__faq-item summary.page-doi-tac-va-lien-ket__faq-question:hover {
  background: rgba(29, 95, 209, 0.1); /* Lighter version of Auxiliary color */
}
.page-doi-tac-va-lien-ket__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #F2C14E; /* Gold */
}
.page-doi-tac-va-lien-ket__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #4FA8FF; /* Glow */
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-doi-tac-va-lien-ket__faq-item .page-doi-tac-va-lien-ket__faq-answer {
  padding: 0 25px 20px;
  background: #08162B; /* Deep Navy */
  border-radius: 0 0 10px 10px;
  color: #AFC4E8; /* Text Secondary */
}
.page-doi-tac-va-lien-ket__faq-answer p {
    margin: 0;
}

.page-doi-tac-va-lien-ket__contact-section {
  background-color: #08162B; /* Deep Navy */
}

.page-doi-tac-va-lien-ket__contact-form-wrapper {
  padding: 40px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.page-doi-tac-va-lien-ket__contact-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 25px;
  object-fit: cover;
  display: block;
}

.page-doi-tac-va-lien-ket__form-group {
  margin-bottom: 20px;
}

.page-doi-tac-va-lien-ket__form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #F3F8FF; /* Text Main */
  font-size: 1rem;
}

.page-doi-tac-va-lien-ket__form-input,
.page-doi-tac-va-lien-ket__form-textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #244D84; /* Border */
  border-radius: 8px;
  background-color: #08162B; /* Deep Navy */
  color: #F3F8FF; /* Text Main */
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-doi-tac-va-lien-ket__form-input::placeholder,
.page-doi-tac-va-lien-ket__form-textarea::placeholder {
  color: #AFC4E8; /* Text Secondary */
  opacity: 0.7;
}

.page-doi-tac-va-lien-ket__form-input:focus,
.page-doi-tac-va-lien-ket__form-textarea:focus {
  border-color: #4FA8FF; /* Glow */
  box-shadow: 0 0 0 3px rgba(79, 168, 255, 0.3);
  outline: none;
}

.page-doi-tac-va-lien-ket__contact-info {
  text-align: center;
  margin-top: 30px;
  font-size: 1.05rem;
  color: #AFC4E8; /* Text Secondary */
}

/* General image responsiveness */
.page-doi-tac-va-lien-ket img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-doi-tac-va-lien-ket__main-title {
    font-size: 3rem;
  }
  .page-doi-tac-va-lien-ket__section-title {
    font-size: 2.2rem;
  }
  .page-doi-tac-va-lien-ket__grid-layout {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
  }
  .page-doi-tac-va-lien-ket__card {
    padding: 20px;
  }
  .page-doi-tac-va-lien-ket__process-steps {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
  }
  .page-doi-tac-va-lien-ket__faq-qtext {
    font-size: 1rem;
  }
}

@media (max-width: 768px) {
  .page-doi-tac-va-lien-ket__container {
    padding: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* HERO 主图区域 */
  .page-doi-tac-va-lien-ket__hero-section {
    padding-top: 10px; /* Consistent small top padding */
    padding-bottom: 30px;
  }
  .page-doi-tac-va-lien-ket__hero-image-wrapper {
    max-height: 400px;
  }
  .page-doi-tac-va-lien-ket__hero-image {
    object-fit: contain !important; /* Prevent cropping on mobile */
    aspect-ratio: unset !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-doi-tac-va-lien-ket__main-title {
    font-size: clamp(2rem, 8vw, 2.5rem); /* Adjust for mobile legibility */
    margin-bottom: 15px;
  }
  .page-doi-tac-va-lien-ket__hero-description {
    font-size: 0.95rem;
    margin-bottom: 25px;
  }

  .page-doi-tac-va-lien-ket__section {
    padding: 40px 0;
  }
  .page-doi-tac-va-lien-ket__section-title {
    font-size: clamp(1.8rem, 7vw, 2.2rem);
    margin-bottom: 30px;
  }
  .page-doi-tac-va-lien-ket__text-block {
    font-size: 0.95rem;
    text-align: left;
  }

  /* 通用图片与容器 */
  .page-doi-tac-va-lien-ket img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-doi-tac-va-lien-ket__card-image {
    width: 100% !important;
    height: auto !important;
    min-width: 200px; /* Ensure minimum size */
    min-height: 150px;
  }
  .page-doi-tac-va-lien-ket__card {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 15px;
  }

  /* 按钮与按钮容器 */
  .page-doi-tac-va-lien-ket__btn-primary {
    padding: 12px 20px;
    font-size: 1rem;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }
  .page-doi-tac-va-lien-ket__cta-buttons {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
    display: flex;
    flex-direction: column; /* Stack buttons vertically on mobile */
  }

  .page-doi-tac-va-lien-ket__grid-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-doi-tac-va-lien-ket__card-title {
    font-size: 1.3rem;
  }
  .page-doi-tac-va-lien-ket__card-description {
    font-size: 0.9rem;
  }
  .page-doi-tac-va-lien-ket__process-steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-doi-tac-va-lien-ket__step-number {
    width: 45px;
    height: 45px;
    font-size: 1.5rem;
  }
  .page-doi-tac-va-lien-ket__step-title {
    font-size: 1.2rem;
  }
  .page-doi-tac-va-lien-ket__step-description {
    font-size: 0.9rem;
  }

  /* FAQ Styles */
  details.page-doi-tac-va-lien-ket__faq-item summary.page-doi-tac-va-lien-ket__faq-question {
    padding: 15px;
  }
  .page-doi-tac-va-lien-ket__faq-qtext {
    font-size: 1rem;
  }
  .page-doi-tac-va-lien-ket__faq-toggle {
    font-size: 20px;
    width: 24px;
  }
  details.page-doi-tac-va-lien-ket__faq-item .page-doi-tac-va-lien-ket__faq-answer {
    padding: 0 15px 15px;
  }

  .page-doi-tac-va-lien-ket__contact-form-wrapper {
    padding: 20px;
  }
  .page-doi-tac-va-lien-ket__form-input,
  .page-doi-tac-va-lien-ket__form-textarea {
    padding: 10px 12px;
    font-size: 0.95rem;
  }
  .page-doi-tac-va-lien-ket__contact-info {
    font-size: 0.95rem;
  }
}