.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  /* font-family: Arial, sans-serif; */
  font-size: 14px;
  line-height: 1.6;
}

/* 主区域布局 */
.footer__main {
  padding: 70px 0 50px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr 0.9fr;
  gap: 40px;
}

/* 第 1 列 */
.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 25px;
}

.footer__logo-placeholder {
  width: 180px;
  height: 50px;
  background-color: var(--color-white); /* 白色方块占位 */
  border-radius: 2px;
}

.footer__logo-img {
  display: block;
  max-height: 50px;
  width: auto;
  height: auto;
}

.footer__logo-text {
  color: var(--color-white);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.6px;
  line-height: 1;
  white-space: nowrap;
}

.footer__desc {
  margin: 0;
  color: var(--color-white);
}

/* 标题 */
.footer__title {
  color: var(--color-white);
  font-size: 18px;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 12px;
}

.footer__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
}

/* 链接列表 (第 2、3 列) */
.footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__list-item {
  margin-bottom: 12px;
}

.footer__link {
  color: var(--color-white);
  text-decoration: none;
  transition:
    color 0.3s,
    padding-left 0.3s;
  display: inline-block;
}

.footer__link:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

/* 联系方式 (第 4 列) */
.footer__contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 16px;
}

.footer__icon-placeholder {
  display: block;
  width: 16px;
  height: 16px;
  /* background-color: var(--color-accent);  */
  border-radius: 2px;
  flex-shrink: 0;
  margin-top: 4px;
}

.footer__contact-text {
  color: var(--color-white);
}

/* 底部版权栏 */
.footer__bottom {
  background-color: var(--color-primary);
  padding: 25px 0;
  border-top: 1px solid var(--color-primary-light);
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copyright {
  color: var(--color-white);
}

.footer__aux-links {
  display: flex;
  align-items: center;
  gap: 15px;
}

.footer__aux-link {
  color: var(--color-white);
  text-decoration: none;
  transition: color 0.3s;
}

.footer__aux-link:hover {
  color: var(--color-accent);
}

.footer__separator {
  color: var(--color-white);
  opacity: 0.5;
}

.footer__social-inner {
  display: grid;
  grid-template-columns: repeat(3, 42px);
  gap: 14px;
  justify-content: flex-start;
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  text-decoration: none;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.footer__social-link:hover {
  border-color: rgba(255, 255, 255, 0.5);
  background-color: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.footer__social-icon {
  width: 20px;
  height: 20px;
  display: block;
}

.footer__accordion-toggle {
  border: 0;
  padding: 0;
  background-color: transparent;
  color: inherit;
  font: inherit;
  cursor: default;
}

/* 响应式 */
@media (min-width: 768px) and (max-width: 1199px) {
  .footer__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .footer__inner {
    grid-template-columns: 1fr;
  }

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 15px;
  }

  .footer__social-inner {
    justify-content: center;
  }

  .footer__title {
    margin-bottom: 0;
    padding-bottom: 0;
  }

  .footer__title::after {
    display: none;
  }

  .footer__accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 0;
    padding: 14px 0;
    background-color: transparent;
    color: var(--color-white);
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
  }

  .footer__accordion-toggle::after {
    content: '';
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--color-white);
    border-bottom: 2px solid var(--color-white);
    transform: rotate(45deg);
    transition: transform 0.3s;
  }

  .footer__col--open .footer__accordion-toggle::after {
    transform: rotate(-135deg);
  }

  .footer__accordion-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }

  .footer__col--open .footer__accordion-panel {
    max-height: 360px;
  }
}

.floating-contact {
  position: fixed;
  right: 10px;
  top: 55%;
  transform: translateY(-55%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
  align-items: flex-end;
}

.floating-contact .contact-item {
  height: 52px;
  width: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  background-color: #1f3a66;
  color: #ffffff;
  border-radius: 999px;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
  overflow: hidden;
  text-decoration: none;
  user-select: none;
  transform: translateX(0) scale(1);
  transition:
    width 240ms ease,
    transform 240ms ease,
    box-shadow 240ms ease,
    background-color 240ms ease;
  will-change: width, transform;
}

.floating-contact .contact-item--phone {
  cursor: default;
}

.floating-contact .contact-item--email,
.floating-contact .contact-item--whatsapp {
  cursor: pointer;
}

.floating-contact .contact-item:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.9);
  outline-offset: 3px;
}

.floating-contact .icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 52px;
  color: #ffffff;
}

.floating-contact .content {
  display: inline-flex;
  align-items: center;
  height: 52px;
  white-space: nowrap;
  padding-right: 16px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  opacity: 0;
  transform: translateX(18px);
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

@media (hover: hover) and (pointer: fine) {
  .floating-contact .contact-item:hover {
    width: 240px;
    transform: translateX(-8px) scale(1.03);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
  }

  .floating-contact .contact-item--email:hover {
    width: 280px;
  }

  .floating-contact .contact-item:hover .content {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 768px) {
  .floating-contact {
    right: 12px;
    gap: 10px;
  }

  .floating-contact .contact-item {
    width: 52px;
  }

  .floating-contact .content {
    display: none;
  }

}