/* ===== 通用页脚 ===== */
:root {
  --footer-icon: clamp(18px, 1.2vw, 24px);
  --footer-gap: clamp(10px, 1.4vw, 20px);
  --footer-fz: clamp(13px, 1vw, 16px);
}

.site-footer {
  border-top: 1px solid #eee;
  color: #444;
  padding: 28px 0 36px;
  background: #fff;
}

.footer-inner {
  text-align: center;
}

.footer-social {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
  display: flex;
  flex-wrap: wrap;
  gap: var(--footer-gap);
  justify-content: center;
  align-items: center;
}

.social-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #111;
  font-weight: 600;
  font-size: var(--footer-fz);
  border: 1px solid #111;
  border-radius: 12px;
  padding: 8px 12px;
  background: #fff;
  cursor: pointer;
  transition: transform .12s ease, background-color .12s ease;
}

.social-item:hover {
  transform: translateY(-1px);
  background: #fafafa;
}

.social-item svg {
  width: var(--footer-icon);
  height: var(--footer-icon);
  display: block;
}

.social-item .label {
  line-height: 1;
}

.social-linkedin {
  border-color: #0a66c2;
  color: #0a66c2;
}

.social-linkedin:hover {
  background: rgba(10, 102, 194, .06);
}

.social-outlook {
  border-color: #0364b8;
  color: #0364b8;
}

.social-outlook:hover {
  background: rgba(3, 100, 184, .06);
}

.social-wechat {
  border-color: #20ad3a;
  color: #20ad3a;
}

.social-wechat:hover {
  background: rgba(32, 173, 58, .06);
}

.social-qq {
  border-color: #12a1e3;
  color: #12a1e3;
}

.social-qq:hover {
  background: rgba(18, 161, 227, .06);
}

.footer-copy {
  display: inline-block;
  margin-top: 6px;
  font-size: var(--footer-fz);
  color: #555;
}

.footer-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  background: #111;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1;
  box-shadow: 0 8px 26px rgba(0, 0, 0, .18);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 9999;
}

.footer-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
  .social-item {
    padding: 10px 12px;
    gap: 8px;
  }

  .footer-social {
    row-gap: 10px;
  }
}