/* ============================================================
   生日快乐贺卡 · 样式
   方向：治愈系手帐拼贴（paper collage / sticker scrapbook）

   平面设计风：纯色块 + 硬边偏移投影 + 纸纹网格底纹 + 和纸胶带，
   刻意避开「AI 味」——不用渐变按钮、不用玻璃拟态、不用紫蓝渐变。

   设计原则来自 GitHub 上星标很高的开源设计 skill：
   · frontend-design（anthropics/skills 一脉，见 mrgoonie/claudekit-skills、
     JetBrains/skills 分发）：先定一个大胆的美学方向；字体要有性格，
     不用 Inter / Roboto / Arial；配色用「主色 + 少量锐利强调色」；
     重视页面加载的错落节奏；背景要做出质感而不是纯色。
   · claude design system（bergside/awesome-design-skills）：平面按钮、
     硬朗对比、克制的阴影、4/8/12/16/24/32 间距节奏、显式交互状态。
   ============================================================ */

:root {
  /* ---- 纸张 ---- */
  --paper:      #fffdf8;   /* 象牙白卡纸 */
  --paper-2:    #fff7ec;
  --bg:         #f6efe3;   /* 奶油牛皮底 */
  --grid:       rgba(203, 180, 156, 0.30);

  /* ---- 墨色 ---- */
  --ink:        #4f4247;
  --ink-soft:   #8b7a80;
  --ink-faint:  rgba(79, 66, 71, 0.42);

  /* ---- 线与硬边投影 ---- */
  --line:       #eadccb;
  --line-deep:  #dcc9b4;
  --hard:       rgba(79, 66, 71, 0.14);
  --hard-2:     rgba(79, 66, 71, 0.22);

  /* ---- 主色 + 锐利强调色 ---- */
  --pink:       #f6a2b6;
  --pink-soft:  #ffe6ee;
  --berry:      #d8557a;   /* 唯一的锐利强调色 */
  --berry-deep: #b8456a;
  --mint:       #8ed3bd;
  --butter:     #f6cf7b;
  --lilac:      #c8b5e6;
  --blue:       #a9cfe6;

  --radius:     18px;
  --radius-sm:  12px;
  --radius-lg:  24px;

  /* ---- 字体：要有性格，不用系统默认脸 ---- */
  --round: "Yuanti SC", "YouYuan", "Hiragino Maru Gothic ProN", "Rounded Mplus 1c",
           "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;   /* 圆体：可爱标题 */
  --kaiti: "Kaiti SC", "STKaiti", "KaiTi", "Noto Serif SC", "Songti SC", serif; /* 楷体：手写信 */
  --body:  "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  min-height: 100vh;
  font-family: var(--body);
  color: var(--ink);
  background-color: var(--bg);
  /* 手帐方格纸：极淡的横竖格 */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 56px;
  padding-bottom: calc(56px + env(safe-area-inset-bottom));
}

/* 纸张颗粒：细密小点，给平面底色加一点手作质感 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 1;
  pointer-events: none;
  background-image: radial-gradient(rgba(160, 140, 120, 0.10) 1px, transparent 1px);
  background-size: 7px 7px;
  opacity: 0.55;
}

button { font-family: inherit; }
:focus-visible { outline: 3px solid var(--berry); outline-offset: 3px; border-radius: 6px; }

/* ============================================================
   背景装饰：和纸胶带 + 漂浮小爱心
   ============================================================ */
.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }

/* 和纸胶带：半透明、硬边、撕口 */
.tape {
  position: fixed;
  height: 26px;
  width: 130px;
  background: var(--tape-c, rgba(246, 162, 182, 0.42));
  border-radius: 3px;
  transform: rotate(var(--tape-r, -18deg));
  clip-path: polygon(0 8%, 3% 0, 97% 5%, 100% 0, 100% 92%, 96% 100%, 4% 95%, 0 100%);
  opacity: 0.92;
}
.tape-1 { top: 9vh;  left: -34px;  width: 158px; --tape-r: -24deg; --tape-c: rgba(246, 207, 123, 0.48); }
.tape-2 { top: 44vh; right: -40px; width: 166px; --tape-r: 20deg;  --tape-c: rgba(142, 211, 189, 0.46); }
.tape-3 { bottom: 12vh; left: -30px; width: 148px; --tape-r: 14deg; --tape-c: rgba(200, 181, 230, 0.44); }

.hearts i {
  position: absolute;
  bottom: -40px;
  font-style: normal;
  animation: heart-rise linear forwards;
  will-change: transform, opacity;
}
@keyframes heart-rise {
  0%   { transform: translateY(0) rotate(-8deg) scale(0.7); opacity: 0; }
  12%  { opacity: 0.5; }
  85%  { opacity: 0.3; }
  100% { transform: translateY(-112vh) rotate(10deg) scale(1.1); opacity: 0; }
}

/* ============================================================
   音乐按钮（平面）
   ============================================================ */
.music-btn {
  position: fixed;
  top: 14px; right: 14px;
  z-index: 40;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 15px;
  font-size: 0.8rem; font-weight: 700;
  color: var(--berry-deep);
  background: var(--paper);
  border: 2px solid var(--line-deep);
  border-radius: 999px;
  box-shadow: 3px 4px 0 var(--hard);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease,
              background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.music-btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 6px 0 var(--hard); }
.music-btn:active { transform: translate(3px, 4px); box-shadow: 0 0 0 var(--hard); }
.music-btn.playing {
  color: #fff;
  background: var(--berry);
  border-color: var(--berry-deep);
}

/* ============================================================
   信封开场（平面纸感）
   ============================================================ */
.envelope-screen {
  position: fixed; inset: 0; z-index: 30;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 34px;
  padding: 0 20px;
  background-color: #fbd9e4;
  /* 波点：手帐里的圆点贴纸感，纯平面 */
  background-image: radial-gradient(#ffffff 2.6px, transparent 2.7px);
  background-size: 26px 26px;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}
.envelope-screen.hidden { opacity: 0; visibility: hidden; }

.env-dateline {
  padding: 5px 14px;
  font-family: var(--round);
  font-size: 0.72rem; letter-spacing: 0.28em; text-indent: 0.28em;
  color: var(--berry-deep);
  background: var(--paper);
  border: 2px dashed var(--pink);
  border-radius: 999px;
  transform: rotate(-1.5deg);
}

.envelope {
  position: relative;
  width: min(330px, 86vw);
  height: 216px;
  cursor: pointer;
  transition: transform 0.3s ease;
  transform-style: preserve-3d;
}
.envelope:hover { transform: translateY(-6px) rotate(-1.5deg); }
.envelope.opening { cursor: default; }

.env-shadow { display: none; }

.env-body, .env-front { position: absolute; inset: 0; border-radius: 14px; }
.env-body {
  background: #f4b9cb;
  border: 2px solid #e09cb4;
}
.env-front {
  background: #ffeaf1;
  border: 2px solid #eaa9c0;
  clip-path: polygon(0 0, 50% 44%, 100% 0, 100% 100%, 0 100%);
  box-shadow: 5px 6px 0 rgba(79, 66, 71, 0.18);
  z-index: 3;
}
.env-flap {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 60%;
  background: #f7bcd0;
  border: 2px solid #e29db8;
  border-radius: 14px 14px 0 0;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top center;
  transition: transform 0.75s cubic-bezier(0.6, 0, 0.3, 1);
  z-index: 4;
  backface-visibility: hidden;
}
.envelope.opening .env-flap { transform: rotateX(-176deg); }

.env-letter {
  position: absolute; left: 6%; right: 6%; top: 12%;
  height: 84%;
  padding: 20px 16px;
  text-align: center;
  background: var(--paper);
  border: 2px solid var(--line-deep);
  color: var(--ink);
  border-radius: 12px;
  transform: translateY(0);
  transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) 0.4s;
  z-index: 2;
}
.envelope.opening .env-letter { transform: translateY(-152%) scale(1.04); }
.env-letter-stamp {
  position: absolute; top: 10px; right: 12px;
  padding: 2px 8px;
  font-size: 0.6rem; letter-spacing: 0.12em;
  color: var(--berry-deep);
  border: 1.5px dashed var(--berry);
  border-radius: 999px;
  transform: rotate(6deg);
  background: #fff;
}
.env-letter-to {
  margin-top: 30px;
  font-family: var(--kaiti); font-size: 1.5rem; letter-spacing: 0.02em;
  color: var(--berry-deep);
}
.env-letter-mid {
  margin-top: 8px;
  font-family: var(--round); font-size: 0.9rem;
  color: var(--ink-soft);
}

.env-seal {
  position: absolute; left: 50%; top: 36%;
  width: 54px; height: 54px;
  display: grid; place-items: center;
  transform: translate(-50%, -50%);
  background: var(--berry);
  border: 2px solid var(--berry-deep);
  color: #fff;
  font-size: 1.4rem;
  border-radius: 50%;
  box-shadow: 3px 4px 0 rgba(79, 66, 71, 0.24);
  z-index: 6;
  transition: transform 0.5s ease, opacity 0.5s ease;
}
.envelope.opening .env-seal { transform: translate(-50%, -50%) scale(0.4) rotate(35deg); opacity: 0; }

.env-hint {
  padding: 5px 14px;
  font-size: 0.86rem; letter-spacing: 0.08em;
  color: var(--berry-deep);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  animation: breathe 2.6s ease-in-out infinite;
}
@keyframes breathe { 50% { opacity: 0.4; } }

/* ============================================================
   主体
   ============================================================ */
.card-content {
  position: relative; z-index: 2;
  max-width: 640px;
  margin: 0 auto;
  padding: 54px 18px 20px;
  opacity: 0;
  transform: translateY(24px);
  visibility: hidden;
  transition: opacity 0.9s ease 0.15s, transform 0.9s ease 0.15s, visibility 0.9s;
}
.card-content.visible { opacity: 1; transform: none; visibility: visible; }

/* ============================================================
   封面
   ============================================================ */
.cover { position: relative; text-align: center; }
.cover-kicker {
  display: inline-block;
  padding: 3px 12px;
  font-family: var(--round);
  font-size: 0.66rem; letter-spacing: 0.3em; text-indent: 0.3em;
  color: #7a5a3e;
  background: var(--butter);
  border-radius: 4px;
  transform: rotate(-1.5deg);
  margin-bottom: 24px;
}
.cover-title {
  font-family: var(--round);
  font-weight: 800;
  font-size: clamp(2.4rem, 13vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.cover-title em {
  font-style: normal;
  color: var(--berry);
  position: relative;
  white-space: nowrap;
}
.cover-title em::after {
  content: "";
  position: absolute; left: -2%; right: -2%; bottom: 0.1em;
  height: 0.34em;
  background: var(--pink-soft);
  border-radius: 999px;
  z-index: -1;
}
.cover-sub {
  margin: 18px auto 0;
  max-width: 30em;
  min-height: 1.7em;
  font-size: clamp(0.92rem, 3.6vw, 1.05rem);
  color: var(--ink-soft);
  line-height: 1.9;
}
.cover-sub .caret {
  display: inline-block; width: 2px; height: 1.05em; margin-left: 2px;
  background: var(--berry); vertical-align: -0.18em;
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 拍立得：白框 + 硬边投影 + 微微歪 */
.cover-photo {
  position: relative;
  margin: 30px 0 0;
  background: #fff;
  border: 2px solid var(--line-deep);
  padding: 10px 10px 0;
  border-radius: var(--radius-lg);
  box-shadow: 6px 7px 0 var(--hard);
  transform: rotate(-1.4deg);
}
.cover-photo::before {
  content: "";
  position: absolute; top: -12px; left: 50%; margin-left: -46px;
  width: 92px; height: 24px;
  background: rgba(246, 207, 123, 0.6);
  border-radius: 2px;
  transform: rotate(-3deg);
  clip-path: polygon(0 10%, 4% 0, 96% 6%, 100% 0, 100% 90%, 95% 100%, 5% 94%, 0 100%);
}
.cover-photo img {
  display: block; width: 100%; height: auto;
  aspect-ratio: 3 / 2; object-fit: cover; object-position: center;
  border-radius: 16px;
}
.cover-photo figcaption {
  padding: 12px 6px 14px;
  font-family: var(--kaiti);
  font-size: 0.85rem; color: var(--ink-soft);
}
.cover-photo figcaption span {
  font-family: var(--round);
  letter-spacing: 0.12em;
  font-size: 0.68rem; color: var(--berry-deep); margin-right: 6px;
}

.cover-stamp {
  position: absolute;
  right: 2px; bottom: 70px;
  width: 66px; height: 66px;
  display: grid; place-items: center;
  font-family: var(--round); font-weight: 700;
  font-size: 1rem; line-height: 1; text-align: center;
  color: var(--berry-deep);
  border: 2px dashed var(--pink);
  border-radius: 50%;
  transform: rotate(9deg);
  background: rgba(255, 255, 255, 0.9);
}

/* ============================================================
   卡片（纸张 + 和纸胶带）
   ============================================================ */
.card {
  position: relative;
  margin-top: 34px;
  padding: 32px 22px;
  background: var(--paper);
  border: 2px solid var(--line-deep);
  border-radius: var(--radius);
  box-shadow: 6px 7px 0 var(--hard);
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.card.reveal { opacity: 1; transform: none; }
.card::before {
  content: "";
  position: absolute; top: -12px; left: 50%; margin-left: -46px;
  width: 92px; height: 24px;
  background: rgba(246, 207, 123, 0.58);
  border-radius: 2px;
  transform: rotate(-2.5deg);
  clip-path: polygon(0 10%, 4% 0, 96% 6%, 100% 0, 100% 90%, 95% 100%, 5% 94%, 0 100%);
}
.letter::before { background: rgba(200, 181, 230, 0.5); transform: rotate(2.5deg); margin-left: -52px; }

.section-label {
  display: inline-block;
  padding: 3px 12px;
  font-family: var(--round); font-weight: 700;
  font-size: 0.64rem; letter-spacing: 0.22em; text-indent: 0.22em;
  color: #7a5a3e;
  background: var(--butter);
  border-radius: 4px;
  transform: rotate(-1.2deg);
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--round); font-weight: 800;
  font-size: clamp(1.32rem, 5.4vw, 1.75rem);
  text-align: center; letter-spacing: 0.01em;
}

/* ============================================================
   状态 / 倒计时
   ============================================================ */
.status { text-align: center; }
.status h2 { font-family: var(--round); font-weight: 800; font-size: 1.24rem; margin-bottom: 10px; }
.status p { font-size: 0.93rem; color: var(--ink-soft); line-height: 1.85; }
.status-birthday h2 { color: var(--berry-deep); }

.countdown { display: flex; justify-content: center; gap: 8px; margin: 22px 0 16px; }
.cd-cell {
  flex: 1; max-width: 84px; min-width: 0;
  padding: 12px 4px;
  background: var(--paper-2);
  border: 2px solid var(--line-deep);
  border-radius: var(--radius-sm);
  box-shadow: 3px 4px 0 var(--hard);
}
.cd-cell:nth-child(1) { background: #ffe9f0; border-color: #f0bfd0; }
.cd-cell:nth-child(2) { background: #e6f6f0; border-color: #bcdfd2; }
.cd-cell:nth-child(3) { background: #fdf2dd; border-color: #edd7a4; }
.cd-cell:nth-child(4) { background: #eee8f8; border-color: #d3c6e8; }
.cd-cell b {
  display: block;
  font-family: var(--round); font-weight: 800;
  font-size: clamp(1.4rem, 6vw, 1.7rem);
  color: var(--berry-deep);
  font-variant-numeric: tabular-nums;
}
.cd-cell span { font-size: 0.7rem; color: var(--ink-soft); }
.lock-note { margin-top: 6px; }

/* ============================================================
   真实治愈照片墙
   ============================================================ */
.gallery { margin-top: 54px; text-align: center; }
.section-intro {
  max-width: 32em; margin: 14px auto 28px;
  text-align: center; font-size: 0.93rem;
  color: var(--ink-soft); line-height: 1.9;
}
.photo-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.shot {
  position: relative;
  background: #fff;
  border: 2px solid var(--line-deep);
  padding: 8px 8px 0;
  border-radius: 14px;
  box-shadow: 5px 6px 0 var(--hard);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.35s ease;
}
/* 每张照片贴一条和纸胶带 */
.shot::before {
  content: "";
  position: absolute; top: -9px; left: 50%; margin-left: -32px;
  width: 64px; height: 19px;
  background: rgba(246, 162, 182, 0.5);
  border-radius: 2px;
  transform: rotate(-3deg);
  clip-path: polygon(0 12%, 5% 0, 95% 7%, 100% 0, 100% 88%, 94% 100%, 6% 93%, 0 100%);
  z-index: 2;
}
.shot:nth-child(3n+1)::before { background: rgba(142, 211, 189, 0.48); transform: rotate(3deg); }
.shot:nth-child(3n)::before   { background: rgba(169, 207, 230, 0.5); transform: rotate(-2deg); }
.shot img {
  display: block; width: 100%; height: auto;
  aspect-ratio: 3 / 2; object-fit: cover;
  border-radius: 10px;
}
.shot:nth-child(odd) { transform: rotate(-1.2deg); }
.shot:nth-child(even) { transform: rotate(1deg); }
.shot:hover { transform: rotate(0) translate(-2px, -2px); box-shadow: 8px 9px 0 var(--hard); z-index: 2; }
.shot-wide { grid-column: 1 / -1; }
.shot figcaption {
  padding: 10px 4px 12px;
  text-align: center;
  font-family: var(--kaiti);
  font-size: 0.82rem; color: var(--ink-soft);
}

/* ============================================================
   蛋糕抽奖机
   ============================================================ */
.lottery { text-align: center; }
.lottery-stage { margin-top: 30px; }
.gacha {
  position: relative;
  width: 230px;
  margin: 0 auto;
  cursor: pointer;
  transition: transform 0.25s ease;
}
.gacha:active { transform: scale(0.97); }
.gacha.shaking { animation: gacha-shake 0.62s cubic-bezier(0.36, 0.07, 0.19, 0.97); }
@keyframes gacha-shake {
  0%, 100% { transform: translateX(0) rotate(0); }
  15% { transform: translateX(-14px) rotate(-4deg); }
  30% { transform: translateX(12px) rotate(3deg); }
  45% { transform: translateX(-10px) rotate(-3deg); }
  60% { transform: translateX(8px) rotate(2deg); }
  75% { transform: translateX(-5px) rotate(-1deg); }
}
/* 抽奖前的「？」贴纸 */
.gacha-q {
  position: absolute; left: 50%; top: -48px;
  transform: translateX(-50%);
  width: 58px; height: 58px;
  display: grid; place-items: center;
  font-family: var(--round); font-weight: 800;
  font-size: 1.8rem;
  color: #fff;
  background: var(--berry);
  border: 2px solid var(--berry-deep);
  border-radius: 50%;
  box-shadow: 3px 4px 0 rgba(79, 66, 71, 0.22);
  z-index: 5;
  animation: q-bob 2.4s ease-in-out infinite;
}
.gacha-q.spin { animation: q-spin 0.55s ease-in-out; }
@keyframes q-bob { 50% { transform: translateX(-50%) translateY(-5px); } }
@keyframes q-spin {
  0%   { transform: translateX(-50%) rotate(0) scale(1); }
  50%  { transform: translateX(-50%) rotate(200deg) scale(1.2); }
  100% { transform: translateX(-50%) rotate(360deg) scale(1); }
}
.gacha-hint { margin-top: 20px; font-size: 0.85rem; color: var(--ink-soft); }

.candles { display: flex; justify-content: center; gap: 18px; margin-bottom: -4px; }
.candle {
  position: relative; width: 8px; height: 42px;
  background: repeating-linear-gradient(45deg, #fffdfa, #fffdfa 5px, var(--pink) 5px, var(--pink) 10px);
  border-radius: 4px 4px 2px 2px;
}
.flame {
  position: absolute; left: 50%; top: -20px;
  width: 13px; height: 20px;
  transform: translateX(-50%) scale(0);
  transform-origin: 50% 100%;
  background: var(--butter);
  border: 2px solid #e8a83c;
  border-radius: 50% 50% 50% 50% / 62% 62% 38% 38%;
  transition: transform 0.3s ease;
}
.gacha.lit .flame { transform: translateX(-50%) scale(1); animation: flicker 0.32s ease-in-out infinite alternate; }
@keyframes flicker {
  from { transform: translateX(-50%) scale(1) rotate(-2deg); }
  to   { transform: translateX(-50%) scale(1.12) rotate(2deg); }
}
.smoke {
  position: absolute; left: 50%; top: -18px;
  width: 6px; height: 6px; border-radius: 50%;
  background: rgba(150, 120, 130, 0.5);
  opacity: 0;
}
.gacha.blown .smoke { animation: smoke 1.4s ease-out forwards; }
@keyframes smoke {
  0% { opacity: 0.7; transform: translate(-50%, 0) scale(0.6); }
  100% { opacity: 0; transform: translate(-50%, -46px) scale(2.2); }
}

/* 蛋糕：纯色分层 + 描边 */
.plate {
  height: 12px; margin: 0 auto -2px; width: 230px;
  background: #f2c9d6;
  border: 2px solid #dda8bb;
  border-radius: 50%;
}
.layer {
  position: relative; margin: 0 auto;
  border: 2px solid var(--line-deep);
  border-radius: 10px;
}
.layer-1 { width: 196px; height: 44px; background: #ffe1ea; z-index: 1; }
.layer-2 { width: 164px; height: 40px; margin-top: -6px; background: #fdeecd; z-index: 2; }
.layer-3 { width: 136px; height: 36px; margin-top: -6px; background: #ffe1ea; z-index: 3; }
.drip {
  position: absolute; top: -1px; left: 12%;
  width: 16px; height: 16px;
  background: inherit;
  border-radius: 0 0 10px 10px;
}
.drip-b { left: 58%; }

.lottery-result { margin-top: 26px; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.lottery-card {
  width: min(400px, 100%);
  padding: 20px 22px;
  border-radius: var(--radius);
  border: 2px solid var(--line-deep);
  background: var(--paper-2);
  box-shadow: 5px 6px 0 var(--hard);
}
.lottery-card.lottery-pop { animation: lottery-pop 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.3); }
@keyframes lottery-pop {
  from { transform: scale(0.7) translateY(18px) rotate(-3deg); opacity: 0; }
}
.lottery-icon { display: block; font-size: 2.2rem; margin-bottom: 10px; }
.lottery-text {
  font-family: var(--round);
  font-size: 1.05rem; line-height: 1.8; color: var(--ink);
}
.lottery-photo { margin: 0; }
.lottery-photo img {
  display: block; width: 100%;
  aspect-ratio: 3 / 2; object-fit: cover;
  border-radius: 10px;
  border: 2px solid var(--line);
}
.lottery-photo figcaption {
  margin-top: 12px;
  font-family: var(--kaiti);
  font-size: 0.85rem; color: var(--ink-soft); line-height: 1.7;
}

/* ============================================================
   按钮：平面贴纸风（纯色 + 描边 + 硬边偏移投影）
   ============================================================ */
.btn {
  padding: 13px 30px;
  font-family: var(--round); font-weight: 800; font-size: 0.95rem;
  color: #fff;
  background: var(--berry);
  border: 2px solid var(--berry-deep);
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 3px 4px 0 var(--hard-2);
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
}
.btn:hover:not(:disabled) { transform: translate(-1px, -1px); box-shadow: 5px 6px 0 var(--hard-2); }
.btn:active:not(:disabled) { transform: translate(3px, 4px); box-shadow: 0 0 0 var(--hard-2); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-ghost {
  color: var(--berry-deep);
  background: var(--paper);
  border: 2px dashed var(--berry);
  box-shadow: 3px 4px 0 var(--hard);
}

/* ============================================================
   翻转祝福卡
   ============================================================ */
.wishes-section { margin-top: 54px; text-align: center; }
.wishes { margin-top: 28px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.flip {
  perspective: 1200px; height: 150px;
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.flip.reveal { opacity: 1; transform: none; }
.flip-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
  cursor: pointer;
}
.flip.flipped .flip-inner { transform: rotateY(180deg); }
.flip-face {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; padding: 16px;
  text-align: center;
  border-radius: 14px;
  backface-visibility: hidden;
  border: 2px solid var(--line-deep);
}
.flip-front { background: var(--paper); box-shadow: 5px 6px 0 var(--hard); }
.flip-front .num { font-family: var(--round); font-weight: 800; font-size: 1.25rem; color: var(--berry); }
.flip-front .tt { font-family: var(--round); font-weight: 700; font-size: 1rem; }
.flip-front .hint { font-size: 0.68rem; letter-spacing: 0.12em; color: var(--ink-faint); }
.flip-back {
  background: var(--berry);
  border-color: var(--berry-deep);
  color: #fff;
  transform: rotateY(180deg);
  font-family: var(--kaiti);
  font-size: 0.92rem; line-height: 1.75;
}

/* ============================================================
   信（手写楷体）
   ============================================================ */
.letter { text-align: center; }
.polaroid {
  width: min(360px, 100%);
  margin: 6px auto 26px;
  padding: 10px 10px 24px;
  background: #fff;
  border: 2px solid var(--line-deep);
  border-radius: 14px;
  box-shadow: 5px 6px 0 var(--hard);
  transform: rotate(-1.8deg);
  transition: transform 0.4s ease;
}
.polaroid:hover { transform: rotate(0deg); }
.polaroid img {
  width: 100%; height: auto;
  aspect-ratio: 3 / 2; object-fit: cover;
  display: block; border-radius: 8px;
}
.polaroid figcaption {
  margin-top: 12px;
  font-family: var(--kaiti);
  color: var(--ink-soft); font-size: 0.8rem; letter-spacing: 0.04em;
}
.letter-body { text-align: left; max-width: 560px; margin: 0 auto; }
.letter-body p {
  margin-bottom: 14px;
  font-family: var(--kaiti);
  font-size: 1.06rem; line-height: 2; color: var(--ink);
}
.letter-body em { font-style: normal; color: var(--berry-deep); font-weight: 700; }
.letter-body .sign {
  margin-top: 24px; text-align: right;
  font-size: 0.9rem; color: var(--ink-soft);
}

.foot { margin-top: 46px; text-align: center; font-size: 0.72rem; color: var(--ink-faint); line-height: 1.9; }
.foot a { color: inherit; }

/* ============================================================
   末尾的小彩蛋（藏在最下面的悄悄话）
   ============================================================ */
.egg {
  display: flex; flex-direction: column; align-items: center;
  gap: 14px;
  margin-top: 40px;
}
.egg-trigger {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  font-family: var(--round); font-size: 1.15rem; line-height: 1;
  color: var(--berry);
  background: var(--paper);
  border: 2px dashed var(--line-deep);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0.45;
  animation: egg-breathe 3.4s ease-in-out infinite;
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.egg-trigger:hover, .egg-trigger:focus-visible {
  opacity: 1; transform: translateY(-2px); border-color: var(--berry);
}
.egg-trigger:active { transform: translate(1px, 2px); }
.egg-trigger.done { opacity: 1; border-style: solid; border-color: var(--berry); animation: none; }
@keyframes egg-breathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.09); }
}

.egg-note {
  position: relative;
  max-width: 420px;
  padding: 20px 22px 22px;
  text-align: center;
  background: var(--paper);
  border: 2px solid var(--line-deep);
  border-radius: var(--radius);
  box-shadow: 5px 6px 0 var(--hard);
  animation: egg-pop 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.25) both;
}
.egg-note[hidden] { display: none; }
.egg-note::before {
  content: "";
  position: absolute; top: -11px; left: 50%; margin-left: -32px;
  width: 64px; height: 22px;
  background: rgba(142, 211, 189, 0.55);
  border-radius: 2px;
  transform: rotate(-3deg);
  clip-path: polygon(0 10%, 4% 0, 96% 6%, 100% 0, 100% 90%, 95% 100%, 5% 94%, 0 100%);
}
@keyframes egg-pop {
  from { opacity: 0; transform: translateY(10px) scale(0.94); }
  to   { opacity: 1; transform: none; }
}
.egg-kicker {
  margin-bottom: 10px;
  font-family: var(--round); font-weight: 700;
  font-size: 0.72rem; letter-spacing: 0.14em;
  color: var(--ink-faint);
}
.egg-text {
  font-family: var(--kaiti);
  font-size: 1.06rem; line-height: 1.9;
  color: var(--ink);
}

/* ============================================================
   弹窗
   ============================================================ */
.modal {
  position: fixed; inset: 0; z-index: 70;
  display: grid; place-items: center;
  padding: 20px;
  background: rgba(79, 66, 71, 0.42);
  animation: modal-fade 0.3s ease;
}
.modal[hidden] { display: none; }
@keyframes modal-fade { from { opacity: 0; } }

.modal-card {
  position: relative;
  width: min(360px, 92vw);
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  text-align: center;
  background: var(--paper);
  border: 2px solid var(--line-deep);
  border-radius: var(--radius-lg);
  box-shadow: 7px 8px 0 rgba(79, 66, 71, 0.24);
  animation: modal-pop 0.4s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}
@keyframes modal-pop {
  from { transform: translateY(26px) scale(0.92) rotate(-1.5deg); opacity: 0; }
}
.modal-card::before {
  content: "";
  position: absolute; top: -12px; left: 50%; margin-left: -46px;
  width: 92px; height: 24px;
  background: rgba(246, 162, 182, 0.55);
  border-radius: 2px;
  transform: rotate(-2.5deg);
  clip-path: polygon(0 10%, 4% 0, 96% 6%, 100% 0, 100% 90%, 95% 100%, 5% 94%, 0 100%);
  z-index: 3;
}
.modal-photo { margin: 0; }
.modal-photo img {
  display: block; width: 100%;
  max-height: 36vh;
  aspect-ratio: 3 / 2; object-fit: cover;
  border-bottom: 2px solid var(--line-deep);
  border-radius: 22px 22px 0 0;
}
.modal-view { padding: 20px 20px 24px; }
.modal-view .btn { display: block; margin: 12px auto 0; width: fit-content; }
.modal-card h3 {
  margin-bottom: 10px;
  font-family: var(--round); font-weight: 800;
  font-size: 1.3rem; line-height: 1.5;
  color: var(--berry-deep);
}
.modal-card p { margin-bottom: 6px; font-size: 0.93rem; line-height: 1.9; color: var(--ink-soft); }
.modal-card p em { font-style: normal; font-weight: 700; color: var(--berry-deep); }

/* ============================================================
   提示气泡
   ============================================================ */
.toast {
  position: fixed; left: 50%; top: 68px;
  z-index: 60;
  max-width: min(430px, 86vw);
  padding: 13px 22px;
  text-align: center;
  font-family: var(--round); font-weight: 700;
  font-size: 0.93rem;
  color: #fff;
  background: var(--berry);
  border: 2px solid var(--berry-deep);
  border-radius: 999px;
  box-shadow: 4px 5px 0 var(--hard-2);
  opacity: 0;
  transform: translate(-50%, -14px) scale(0.94);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0) scale(1); }

/* ============================================================
   气球（平面）
   ============================================================ */
.balloon {
  position: fixed;
  bottom: -120px;
  width: 34px; height: 42px;
  border: 2px solid rgba(79, 66, 71, 0.25);
  border-radius: 50% 50% 46% 46%;
  pointer-events: none;
  z-index: 25;
  animation: balloon-float linear forwards;
}
.balloon::after {
  content: "";
  position: absolute; left: 50%; top: 100%;
  width: 1.5px; height: 46px;
  background: rgba(79, 66, 71, 0.25);
  transform: translateX(-50%);
}
@keyframes balloon-float {
  0%   { transform: translateY(0) rotate(-4deg); opacity: 0; }
  10%  { opacity: 0.9; }
  100% { transform: translateY(-116vh) rotate(6deg); opacity: 0; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 420px) {
  .envelope { height: 190px; }
  .env-letter-to { font-size: 1.3rem; margin-top: 24px; }
  .card { padding: 28px 18px; }
  .cover-stamp { right: 0; bottom: 52px; width: 58px; height: 58px; font-size: 0.9rem; }
  .countdown { gap: 6px; }
  .cd-cell { padding: 10px 2px; }
  .plate { width: 208px; }
  .gacha { width: 208px; }
  .wishes { gap: 12px; }
  .flip { height: 142px; }
  .photo-grid { gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; animation-iteration-count: 1 !important; }
}