/* Reduced Motion Styles - 减少动画偏好用户 */
.skip-link:focus {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 9999;
  padding: 12px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes heroPop {
  from { opacity: 1; }
  to { opacity: 1; }
}

@keyframes heroGlow {
  from { opacity: 0.8; }
  to { opacity: 0.8; }
}

@keyframes welcomeIn {
  from { opacity: 1; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 1; }
  to { opacity: 1; }
}

@keyframes upUser {
  from { opacity: 1; }
  to { opacity: 1; }
}

@keyframes upAi {
  from { opacity: 1; }
  to { opacity: 1; }
}

@keyframes dotBounce {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(0); }
}

@keyframes blink {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 0.7; }
}

.msg.a.msg-anim,
.msg.u.msg-anim {
  animation: none;
}

.think-dots span {
  animation: none;
}

.cursor {
  animation: none;
}

.input-box:focus-within {
  animation: none;
}