/* ============================================
   animations.css — 关键帧动画 & 过渡效果
   ============================================ */

/* --- Hero 入场动画 --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 滚动指示器脉冲 */
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.4); }
}

/* --- 滚动渐入 (JS 触发) --- */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟层级 — 用于卡片网格 */
.reveal-delay-1 { transition-delay: 0.05s; }
.reveal-delay-2 { transition-delay: 0.12s; }
.reveal-delay-3 { transition-delay: 0.19s; }
.reveal-delay-4 { transition-delay: 0.26s; }
.reveal-delay-5 { transition-delay: 0.33s; }
.reveal-delay-6 { transition-delay: 0.40s; }

/* --- 淡入方向变体 --- */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- 墨点呼吸动画(装饰用) --- */
@keyframes inkBreathe {
  0%, 100% {
    transform: scale(1);
    opacity: 0.06;
  }
  50% {
    transform: scale(1.8);
    opacity: 0.12;
  }
}

/* --- 页面加载过渡 --- */
body {
  animation: fadeIn 0.6s ease-out;
}