/*
 * 开盒动效 · 三幕分镜
 * 参考 doc/box.md
 *
 * Act 1 (0–400ms):   光晕扩散 + 盒子震动 + 背景变暗
 * Act 2 (400–1000ms): 盒盖飞起 + 金色光芒 + 粒子溅射 + 白色闪屏
 * Act 3 (1000–1800ms): 内容弹性弹出 + 彩带纸屑
 *
 * 总时长约 1.8–2.0s
 */

/* ═══ 覆盖层 ═══ */
.animation-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.animation-overlay.visible {
  pointer-events: auto;
}

/* ═══ 背景变暗 ═══ */
.bg-dimmer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 0.4s ease-out;
}

.bg-dimmer.active {
  opacity: 1;
}

/* ════════════════════════
   Act 1 · 光晕扩散 (0–400ms)
   ════════════════════════ */

.act1-glow-ring {
  position: absolute;
  width: 320rpx;
  height: 320rpx;
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.15);
}

.act1-glow-ring.active {
  animation: glowExpand 0.5s ease-out forwards;
}

.glow-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

/* 模式颜色 */
.box-takeout .glow-inner {
  background: radial-gradient(circle, #E8693B 0%, rgba(232,105,59,0.4) 35%, transparent 70%);
}

.box-fridge .glow-inner {
  background: radial-gradient(circle, #4CAF50 0%, rgba(76,175,80,0.4) 35%, transparent 70%);
}

.box-explore .glow-inner {
  background: radial-gradient(circle, #7C3AED 0%, rgba(124,58,237,0.4) 35%, transparent 70%);
}

@keyframes glowExpand {
  0%   { opacity: 0.9; transform: scale(0.15); }
  50%  { opacity: 0.6; transform: scale(1.5); }
  100% { opacity: 0; transform: scale(3.2); }
}

/* ════════════════════════
   Act 1 · 盒子震动
   ════════════════════════ */

.box-stage {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.box-stage.active {
  opacity: 1;
  transform: scale(1);
}

/* ── 盒盖 ── */
.box-lid {
  position: relative;
  z-index: 3;
  margin-bottom: -12rpx;
  transition: transform 0.35s ease-in, opacity 0.35s ease-in;
  transition-delay: 0.05s;
}

.lid-top {
  width: 120rpx;
  height: 40rpx;
  background: linear-gradient(180deg, #F5A623 0%, #E8961A 100%);
  border-radius: 20rpx 20rpx 4rpx 4rpx;
  box-shadow: 0 4rpx 16rpx rgba(200, 120, 20, 0.4);
}

.box-lid.active {
  transform: translateY(-80rpx) rotate(-8deg);
  opacity: 0;
}

/* ── 金色光芒 ── */
.golden-light {
  position: absolute;
  z-index: 1;
  width: 200rpx;
  height: 200rpx;
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.3);
}

.box-takeout .golden-light {
  background: radial-gradient(circle, #FFD54F 0%, rgba(255, 180, 50, 0.6) 30%, transparent 65%);
}

.box-fridge .golden-light {
  background: radial-gradient(circle, #A5D6A7 0%, rgba(76, 175, 80, 0.5) 30%, transparent 65%);
}

.box-explore .golden-light {
  background: radial-gradient(circle, #CE93D8 0%, rgba(124, 58, 237, 0.5) 30%, transparent 65%);
}

.golden-light.active {
  animation: goldenBurst 0.6s ease-out forwards;
}

@keyframes goldenBurst {
  0%   { opacity: 0; transform: scale(0.3); }
  30%  { opacity: 1; transform: scale(1.8); }
  100% { opacity: 0; transform: scale(3.5); }
}

/* ── 盒体（Act2 压缩反弹） ── */
.box-body {
  position: relative;
  z-index: 2;
  transition: transform 0.25s ease-out;
}

.box-body.compressed {
  animation: bodyCompress 0.3s ease-out;
}

.box-emoji {
  font-size: 160rpx;
  display: block;
}

@keyframes bodyCompress {
  0%   { transform: scaleY(1); }
  40%  { transform: scaleY(0.85); }
  100% { transform: scaleY(1); }
}

/* ── 粒子溅射（Act2） ── */
.spark-particles {
  position: absolute;
  z-index: 0;
  top: 50%; left: 50%;
  width: 0; height: 0;
  pointer-events: none;
}

.spark-particles.active .spark {
  animation: sparkBurst 0.7s ease-out forwards;
}

.spark {
  position: absolute;
  font-size: 32rpx;
  opacity: 0;
}

.spark.s1 { animation-delay: 0s !important; }
.spark.s2 { animation-delay: 0.06s !important; }
.spark.s3 { animation-delay: 0.12s !important; }
.spark.s4 { animation-delay: 0.18s !important; }

@keyframes sparkBurst {
  0%   { opacity: 1; transform: translate(0, 0) scale(0.5); }
  100% { opacity: 0; transform: translate(var(--sx, 60rpx), var(--sy, -80rpx)) scale(1.2); }
}

.box-takeout .spark { --sx: 70rpx; --sy: -90rpx; }
.box-takeout .spark.s2 { --sx: -60rpx; --sy: -70rpx; }
.box-takeout .spark.s3 { --sx: 50rpx; --sy: -100rpx; }
.box-takeout .spark.s4 { --sx: -80rpx; --sy: -80rpx; }

.box-fridge .spark { --sx: 70rpx; --sy: -90rpx; }
.box-fridge .spark.s2 { --sx: -60rpx; --sy: -70rpx; }
.box-fridge .spark.s3 { --sx: 50rpx; --sy: -100rpx; }
.box-fridge .spark.s4 { --sx: -80rpx; --sy: -80rpx; }

.box-explore .spark { --sx: 70rpx; --sy: -90rpx; }
.box-explore .spark.s2 { --sx: -60rpx; --sy: -70rpx; }
.box-explore .spark.s3 { --sx: 50rpx; --sy: -100rpx; }
.box-explore .spark.s4 { --sx: -80rpx; --sy: -80rpx; }

/* ════════════════════════
   Act 2 · 白色闪屏 (600–1000ms)
   ════════════════════════ */

.act2-mask {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #FFFFFF;
  opacity: 0;
  pointer-events: none;
}

.act2-mask.active {
  animation: maskFlash 0.5s ease-in-out forwards;
  animation-delay: 0.2s;
}

@keyframes maskFlash {
  0%   { opacity: 0; }
  45%  { opacity: 0.92; }
  100% { opacity: 0; }
}

/* ════════════════════════
   Act 3 · 内容弹性弹出 (1000–1800ms)
   ════════════════════════ */

.act3-content {
  position: relative;
  z-index: 20;
  opacity: 0;
  transform: scale(0.85) translateY(30rpx);
}

.act3-content.active {
  animation: contentReveal 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.content-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

@keyframes contentReveal {
  0%   { opacity: 0; transform: scale(0.85) translateY(30rpx); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* ════════════════════════
   Act 3 · 彩带纸屑 (1600ms+)
   ════════════════════════ */

.confetti-stage {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.confetti-stage.active .confetti {
  animation: confettiDrop 1.4s ease-in forwards;
}

.confetti {
  position: absolute;
  top: -20rpx;
  left: var(--x, 20%);
  width: 14rpx;
  height: 14rpx;
  border-radius: 3rpx;
  background: var(--c, #E8693B);
  opacity: 0;
  animation-delay: var(--d, 0s);
}

@keyframes confettiDrop {
  0%   { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); }
  30%  { opacity: 0.9; transform: translateY(280rpx) rotate(180deg) scale(0.7); }
  60%  { opacity: 0.5; transform: translateY(600rpx) rotate(400deg) scale(0.4); }
  100% { opacity: 0; transform: translateY(1000rpx) rotate(720deg) scale(0.1); }
}