/* ========================================
   四川瑞泽科技 - 页脚样式
   ======================================== */

/* ===== 页脚容器 ===== */
footer {
  position: relative;
  background: var(--gradient-night);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
  margin-top: var(--spacing-4xl);
  overflow: hidden;
}

footer::before,
footer::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.4;
  pointer-events: none;
}

footer::before {
  background: radial-gradient(circle at 20% 20%, rgba(94, 184, 255, 0.35), transparent 55%);
}

footer::after {
  background: radial-gradient(circle at 80% 0%, rgba(38, 198, 218, 0.25), transparent 40%);
}

footer a {
  color: var(--color-primary-light);
  transition: color var(--transition-base);
}

footer a:hover {
  color: var(--color-secondary-light);
  text-decoration: underline;
}

footer h3,
footer h4,
footer h5,
footer h6 {
  color: var(--color-white);
}

/* ===== 顶部 CTA ===== */
.footer-cta {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--box-shadow-sm);
  backdrop-filter: blur(10px);
}

.footer-cta .eyebrow {
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  letter-spacing: 2px;
  color: var(--color-primary-light);
  margin-bottom: var(--spacing-sm);
}

.footer-cta h3 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-sm);
}

.footer-cta p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
}

.footer-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-cta .btn {
  border-radius: var(--border-radius-full);
  box-shadow: none;
}

/* ===== 页脚主体 ===== */
.footer-main {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section {
  display: flex;
  flex-direction: column;
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.footer-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.footer-section a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.footer-section a:hover {
  transform: translateX(4px);
}

/* ===== 公司信息部分 ===== */
.footer-company {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background: rgba(2, 136, 209, 0.12);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

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

.footer-company-logo img {
  height: 56px;
  width: auto;
}

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

.footer-company-desc {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.75);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

.footer-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.footer-badges span {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.footer-contact-item strong {
  min-width: 60px;
  color: var(--color-primary-light);
}

.footer-contact-item span {
  color: rgba(255, 255, 255, 0.75);
  word-break: break-all;
}

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

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
  color: var(--color-white);
  text-decoration: none;
  transition: all var(--transition-base);
  font-size: var(--font-size-lg);
}

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

/* ===== 页脚底部 ===== */
.footer-bottom {
  position: relative;
  border-top: var(--border-width-thin) solid rgba(255, 255, 255, 0.18);
  padding-top: var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-meta,
.footer-copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

.footer-certifications {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-xs);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  font-size: var(--font-size-sm);
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .footer-cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
  }
  
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
  }
  
  .footer-section h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}

@media (max-width: 640px) {
  footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }
  
  .footer-company-logo img {
    height: 40px;
  }
  
  .footer-company-name {
    font-size: var(--font-size-base);
  }
  
  .footer-company-desc {
    font-size: var(--font-size-xs);
  }
  
  .footer-contact-item {
    font-size: var(--font-size-xs);
  }
  
  .social-link {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-base);
  }
  
  .footer-copyright {
    font-size: var(--font-size-xs);
  }
  
  .footer-links a {
    font-size: var(--font-size-xs);
  }
}

/* ===== 页脚与内容之间的分隔 ===== */
.footer-divider {
  position: relative;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  margin-bottom: var(--spacing-2xl);
  border-radius: var(--border-radius-full);
}