.tongda_sustainability_core {
  overflow: hidden;
  padding: var(--section-padding) 0;
  background: var(--bg-color, #fafafa);
}

.tongda_sustainability_core_inner {
  display: flex;
  flex-direction: column;
  gap: 3.75rem;
  align-items: center;
}

.tongda_sustainability_core_header {
  display: flex;
  width: 78.4375rem;
  max-width: 100%;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  color: var(--title-text-color, #000);
  text-align: center;
}

.tongda_sustainability_core_title {
  width: 100%;
  margin: 0;
  color: inherit;
  font-family: var(--title-font-family);
  font-size: var(--font-size-60);
  font-weight: var(--font-weight-xl);
  line-height: 1.2167;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  text-transform: capitalize;
}

.tongda_sustainability_core_description {
  width: 100%;
  color: inherit;
  font-family: var(--font-family);
  font-size: var(--font-size-28);
  font-weight: var(--font-weight-md);
  line-height: 1.4286;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.tongda_sustainability_core_list {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.tongda_sustainability_core_card {
  position: relative;
  min-width: 0;
  height: 100%;
  padding: 1rem;
  overflow: hidden;
  color: var(--text-color, #000);
  background: #fff;
  border-radius: 0.625rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: justify-content 0.3s ease;
}

.tongda_sustainability_core_card.active {
  justify-content: flex-start;
}

.tongda_sustainability_core_icon {
  position: relative;
  width: 5rem;
  height: 5rem;
  object-fit: contain;
  margin-bottom: 4.5625rem;
  transition: margin 0.3s ease;
}
.tongda_sustainability_core_card.active .tongda_sustainability_core_icon {
  margin-bottom: 1.8125rem;
}

.tongda_sustainability_core_card_content {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  height: 8.75rem;
  overflow: hidden;
  transition:
    height 0.3s ease,
    flex 0.3s ease;
}

.tongda_sustainability_core_card.active
  .tongda_sustainability_core_card_content {
  height: auto;
  flex: 1;
}

.tongda_sustainability_core_card_title {
  width: 100%;
  margin: 0;
  color: var(--title-text-color, #000);
  font-family: var(--title-font-family);
  font-size: var(--font-size-28);
  font-weight: var(--font-weight-lg);
  line-height: 1.4286;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.tongda_sustainability_core_card_description {
  width: 100%;
  color: var(--text-color, #000);
  font-family: var(--font-family);
  font-size: var(--font-size-24);
  font-weight: var(--font-weight-md);
  letter-spacing: 0;
  overflow-wrap: anywhere;
  transition: line-height 0.45s ease;
}

@media screen and (max-width: 1024px) {
  .tongda_sustainability_core_inner {
    gap: 3rem;
  }

  .tongda_sustainability_core_header {
    width: 100%;
    gap: 1rem;
  }

  .tongda_sustainability_core_list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .tongda_sustainability_core_card,
  .tongda_sustainability_core_card.active {
    padding: 1.5rem;
    justify-content: flex-start;
  }

  .tongda_sustainability_core_icon,
  .tongda_sustainability_core_card.active .tongda_sustainability_core_icon {
    width: 4.5rem;
    height: 4.5rem;
    margin-bottom: 1.5rem;
  }

  .tongda_sustainability_core_card_content,
  .tongda_sustainability_core_card.active
    .tongda_sustainability_core_card_content {
    height: auto;
    flex: none;
    overflow: visible;
  }
}

@media screen and (max-width: 768px) {
  .tongda_sustainability_core_inner {
    gap: 2.5rem;
  }

  .tongda_sustainability_core_list {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .tongda_sustainability_core_card,
  .tongda_sustainability_core_card.active {
    height: auto;
    min-height: 0;
  }
}

@media screen and (max-width: 576px) {
  .tongda_sustainability_core_inner {
    gap: 2rem;
  }

  .tongda_sustainability_core_header {
    gap: 0.875rem;
  }

  .tongda_sustainability_core_list {
    gap: 1rem;
  }

  .tongda_sustainability_core_card,
  .tongda_sustainability_core_card.active {
    padding: 1.25rem;
  }

  .tongda_sustainability_core_icon,
  .tongda_sustainability_core_card.active .tongda_sustainability_core_icon {
    width: 4rem;
    height: 4rem;
  }
}

@media (hover: none) {
  .tongda_sustainability_core_card {
    justify-content: flex-start;
  }

  .tongda_sustainability_core_icon,
  .tongda_sustainability_core_card.active .tongda_sustainability_core_icon {
    margin-bottom: 1.5rem;
  }

  .tongda_sustainability_core_card_content,
  .tongda_sustainability_core_card.active
    .tongda_sustainability_core_card_content {
    height: auto;
    flex: 0 0 auto;
    overflow: visible;
  }
}