/* ============================================================================
   页脚样式
   ============================================================================ */

footer {
  background: radial-gradient(circle at top, rgba(52, 73, 94, 0.9), rgba(27, 40, 53, 0.95));
  color: var(--color-neutral-100);
  padding: var(--spacing-4xl) var(--spacing-lg);
  margin-top: var(--spacing-4xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-section h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-md);
}

.footer-section a {
  color: var(--color-neutral-200);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-secondary);
}

/* 公司信息 */
.footer-company {
  margin-bottom: var(--spacing-lg);
}

.footer-company-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer-company-desc {
  color: var(--color-neutral-300);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

/* 社交媒体 */
.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  color: var(--color-white);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-secondary);
  color: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* 底部栏 */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  letter-spacing: 0.04em;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

@media (min-width: 768px) {
  .footer-links {
    justify-content: flex-end;
  }
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
  letter-spacing: 0.04em;
}

.footer-links a:hover {
  color: var(--color-secondary);
}

/* 联系信息 */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  color: var(--color-neutral-300);
  font-size: var(--font-size-sm);
}

.contact-icon {
  color: var(--color-secondary);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-text {
  flex: 1;
}

.contact-text a {
  color: var(--color-neutral-300);
}

.contact-text a:hover {
  color: var(--color-primary);
}