/* ============================================================
   animations.css — Apple-inspired Restrained Animations
   ============================================================ */

/* ---------- 页面进场淡入转场 ---------- */
.page-transition-enter {
  opacity: 0;
  transform: translateY(8px);
  animation: pageEnter 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 页面离场动画 —— 已移除（2026-10-10）
   原实现通过 .page-transition-exit 把整页设为透明（opacity: 0），但该透明状态
   在部分手机浏览器的「往返缓存」恢复场景下会被保留，导致按返回键后整页空白。
   现改为浏览器原生跳转；此处刻意不再定义该类的任何样式——即使旧版 JS 或历史
   快照残留了这个类名，页面也始终可见，从结构上杜绝「返回后空白」问题。 */

/* ---------- 视口滚动渐入 (.reveal) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

/* Stagger 错开显现延迟 (依次递增 80ms) */
.reveal[data-stagger="1"] { transition-delay: 0ms; }
.reveal[data-stagger="2"] { transition-delay: 80ms; }
.reveal[data-stagger="3"] { transition-delay: 160ms; }
.reveal[data-stagger="4"] { transition-delay: 240ms; }
.reveal[data-stagger="5"] { transition-delay: 320ms; }
.reveal[data-stagger="6"] { transition-delay: 400ms; }

/* ---------- 向下 Chevron 跳动指示器 ---------- */
@keyframes chevronBounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(7px);
  }
}

.hero__scroll-indicator {
  animation: chevronBounce 2.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

/* ---------- 磁吸交互辅助 ---------- */
.magnetic {
  will-change: transform;
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
}

.magnetic.is-hover {
  transition: transform 0.06s linear;
}

/* ---------- 卡片缩略图微妙高光流动 ---------- */
@keyframes subtleShimmer {
  0% {
    transform: translateX(-100%) rotate(35deg);
  }
  100% {
    transform: translateX(220%) rotate(35deg);
  }
}

.project-card__thumb::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(255, 255, 255, 0.12) 50%,
    transparent 100%
  );
  transform: translateX(-100%) rotate(35deg);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.project-card:hover .project-card__thumb::before {
  opacity: 1;
  animation: subtleShimmer 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ---------- 减少动效设置偏好 (prefers-reduced-motion) ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-transition-enter,
  .page-transition-exit {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .hero__scroll-indicator {
    animation: none !important;
  }

  .magnetic {
    transform: none !important;
    transition: none !important;
  }

  .project-card__thumb::before {
    display: none !important;
  }
}