/* v43 — 联系我们（B站 / 抖音 / 公众号）、赞助图标的可点击状态、技术组别增加到四组。 */

/* 技术组别从三组变四组：导航改成四列，窄屏两列。 */
.kw-site #groups .kw-group-nav{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:1000px){.kw-site #groups .kw-group-nav{grid-template-columns:repeat(2,minmax(0,1fr))}}

.kw-contact{border-top:1px solid #262626;padding:40px 6% 44px;text-align:center}
.kw-contact .kw-eyebrow{font-size:11px;letter-spacing:2.5px;color:#8f8f8f;margin-bottom:26px}
.kw-contact-links{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 16px;margin-bottom:20px}
.kw-contact-item{display:inline-flex;align-items:center;gap:14px;min-width:230px;padding:16px 22px;background:#141414;border:1px solid #333;color:#e7e7e3;transition:background .18s ease,border-color .18s ease,transform .18s ease}
.kw-contact-item:hover{background:#1f1f1f;border-color:#f4f4f0;transform:translateY(-2px)}
.kw-contact-icon{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;flex-shrink:0}
.kw-contact-icon img{width:26px;height:26px;display:block;filter:invert(1) brightness(1.05)}
.kw-contact-text{display:flex;flex-direction:column;align-items:flex-start;font-size:15px;line-height:1.5;text-align:left}
.kw-contact-text small{font-size:11px;color:#a8a8a8;letter-spacing:.03em}
.kw-contact-note{font-size:12px;line-height:2;color:#8f8f8f}
/* 可点击的赞助方：悬停时给一点反馈；没有官网链接的赞助方保持静态。 */
a.kw-sponsor{transition:opacity .18s ease,transform .18s ease;padding:0 8px}
a.kw-sponsor:hover{opacity:.85;transform:translateY(-2px)}

@media(max-width:900px){
  .kw-contact-item{min-width:0;width:100%;max-width:420px;justify-content:flex-start}
}
@media(max-width:700px){
  .kw-contact{padding:30px 7% 34px}
  .kw-contact .kw-eyebrow{font-size:9px;margin-bottom:20px}
  .kw-contact-item{padding:13px 16px;gap:12px}
  .kw-contact-icon{width:32px;height:32px}
  .kw-contact-icon img{width:22px;height:22px}
  .kw-contact-text{font-size:14px}
}