/* ── 页脚 ── */
  .site-footer {
    background: #040d1a;
    padding: 60px 60px 30px;
    border-top: 1px solid var(--border);
  }
  .footer-grid {
    display: grid;
    /* 关键：等分布局，保证同一行 */
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
  }
  .footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
  }
  .footer-brand-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
  }
  .footer-brand-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 2px;
  }
  .footer-brand-name span { color: var(--accent); }
  .footer-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
  }
  /* 二维码容器 - 加宽间隙（左侧二维码位置不动） */
  .footer-qr-wrapper {
    display: flex;
    gap: 30px; /* 从18px→30px，大幅加宽间隙，左侧二维码位置不变 */
    margin-top: 12px;
  }
  .footer-qr {
    width: 100px; height: 100px;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
  }
  .footer-qr img { width: 100%; height: 100%; object-fit: contain; }
  .footer-col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .footer-col-title::before {
    content: '';
    width: 3px; height: 16px;
    background: var(--accent);
    border-radius: 2px;
  }
  .footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s;
    letter-spacing: 0.5px;
  }
  .footer-links a:hover { color: var(--accent); }
  .footer-contact-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 14px;
    font-size: 13px;
    color: var(--text-muted);
  }
  .footer-contact-item .icon { color: var(--accent); font-size: 14px; margin-top: 2px; }
  .footer-bottom {
    max-width: 1200px;
    margin: 20px auto 0;
    padding-top: 20px;
    border-top: 1px solid rgba(0,198,255,0.08);
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
  }