/* ============================================
   Footer CSS - 页脚
   ============================================ */

.footer {
  background-color: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.75);
  padding-top: var(--spacing-3xl);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* 公司信息列 */
.footer-brand {
  padding-right: var(--spacing-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--spacing-lg);
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
}

.footer-logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.footer-logo-text small {
  display: block;
  font-size: 0.5625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-top: 2px;
}

.footer-desc {
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.6);
}

/* 导航列 */
.footer-nav-title {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: 0.75rem;
}

.footer-nav-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-primary);
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-nav-list a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-base);
}

.footer-nav-list a:hover {
  color: #ffffff;
  padding-left: 4px;
}

/* 联系信息列 */
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  fill: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-contact-item span {
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* 二维码 */
.footer-qr {
  margin-top: var(--spacing-lg);
}

.footer-qr-title {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.5rem;
}

.footer-qr-img {
  width: 100px;
  height: 100px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.75rem;
}

/* 底部版权 */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--transition-base);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.8);
}

.footer-icp {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* 响应式 */
@media (max-width: 1023px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
    text-align: center;
  }
}

@media (max-width: 767px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-brand {
    text-align: left;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .footer-icp {
    flex-direction: column;
    gap: 0.5rem;
  }
}