/**
 * 全站页脚 Footer 组件
 * 所有页面复用，浅灰底区分主体内容
 */

/* ========== 外层容器 ========== */
.site-footer {
  background: #F5F5F5;
  width: 100%;
  padding: 0;
  display: block;
}

/* ========== 上部链接区 ========== */
.footer-links {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 40px 48px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 40px;
}

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

.footer-column-title {
  font-size: 14px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}

.footer-link {
  display: block;
  font-size: 13px;
  color: #666666;
  text-decoration: none;
  margin-bottom: 14px;
  transition: color 0.2s;
  cursor: pointer;
}

.footer-link:last-child {
  margin-bottom: 0;
}

.footer-link:hover {
  color: #3B82F6;
}

/* ========== 分隔线 ========== */
.footer-divider {
  height: 1px;
  background: #E5E7EB;
  max-width: 1280px;
  margin: 0 auto;
}

/* ========== 中部生态区 ========== */
.footer-ecosystem {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

/* 左侧子站链接 */
.footer-subsites {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-subsite-link {
  font-size: 13px;
  color: #666666;
  text-decoration: none;
  transition: color 0.2s;
  cursor: pointer;
}

.footer-subsite-link:hover {
  color: #3B82F6;
}

/* 右侧社交媒体 */
.footer-social {
  display: flex;
  gap: 16px;
  align-items: center;
}

.footer-social-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666666;
  transition: all 0.2s;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.footer-social-icon:hover {
  background: #3B82F6;
  color: #FFFFFF;
}

.footer-social-icon svg {
  width: 16px;
  height: 16px;
}

/* ========== 下部信息栏 ========== */
.footer-info {
  background: #EEEEEE;
  padding: 20px 40px;
}

.footer-info-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* 左侧版权组 */
.footer-copyright {
  font-size: 12px;
  color: #999999;
}

/* 中间备案与政策组 */
.footer-policies {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-policy-link {
  font-size: 12px;
  color: #999999;
  text-decoration: none;
  transition: color 0.2s;
  cursor: pointer;
}

.footer-policy-link:hover {
  color: #666666;
}

.footer-policy-divider {
  width: 1px;
  height: 12px;
  background: #CCCCCC;
}

/* 右侧联系组 */
.footer-contact {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #999999;
}

.footer-contact-item svg {
  width: 14px;
  height: 14px;
  color: #999999;
}

/* ========== 响应式 ========== */

/* 平板 */
@media (max-width: 1024px) {
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 移动端 */
@media (max-width: 768px) {
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    padding: 40px 24px;
  }

  .footer-ecosystem {
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-info {
    padding: 20px 24px;
  }

  .footer-info-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* 小屏 */
@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
  }
}