/* ===== 全局样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --rose: #F87171;        /* 浅玫瑰红主色 */
  --rose-deep: #B91C1C;   /* 亮酒红 */
  --rose-light: #FB7185;  /* 粉玫红点缀 */
  --gold: #D4AF37;        /* 玫瑰金点缀 */
  --bg: #150a0c;          /* 黑灰带一丝暖 */
  --text: #fef2f2;        /* 暖白文字 */
  --text-light: #d4a5a5;  /* 浅玫瑰灰文字 */
  --card: rgba(55, 15, 18, 0.78);
  --ink: #0e0608;         /* 导航 */
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background:
    radial-gradient(820px 520px at 50% -8%, rgba(248, 113, 113, 0.25), transparent 70%),
    radial-gradient(640px 620px at 8% 35%, rgba(185, 28, 28, 0.28), transparent 72%),
    radial-gradient(700px 560px at 92% 78%, rgba(244, 63, 94, 0.22), transparent 72%),
    radial-gradient(400px 400px at 50% 50%, rgba(60, 15, 20, 0.35), transparent 70%),
    linear-gradient(180deg, #1e0a0e 0%, #150608 50%, #0c0305 100%);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
}

/* ===== 顶部导航 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: #0a0406;
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
  border-bottom: 1px solid rgba(220, 38, 38, 0.22);
}

.nav .logo {
  font-size: 22px;
  font-weight: 800;
  color: #f5d6d6;
  text-decoration: none;
  letter-spacing: 0.5px;
}

.nav .logo span {
  color: #E11D48;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  text-decoration: none;
  color: #c9a8a8;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  transition: all 0.25s;
}

.nav-links a:hover {
  background: rgba(220, 38, 38, 0.18);
  color: #fce8e8;
}

.nav-links a.active {
  background: linear-gradient(135deg, #7F1D1D, #DC2626);
  color: #fff;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.5);
}

/* ===== 主页 ===== */
.hero {
  text-align: center;
  padding: 80px 24px 40px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ===== 首页头像彩蛋 ===== */
.avatar-stage {
  position: relative;
  z-index: 200;
  width: 140px;
  height: 140px;
  margin: 0 auto 24px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.hero-avatar {
  width: 140px;
  height: 140px;
  margin: 0 auto 24px;
  border-radius: 50%;
  display: block;
  object-fit: cover;
  object-position: center;
  background: linear-gradient(135deg, var(--rose-deep), var(--rose-light));
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 44px rgba(220, 38, 38, 0.35);
  border: 4px solid rgba(220, 38, 38, 0.4);
}

/* 弹跳图形层 */
.bounce-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 300;
}

.bounce-item {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  object-fit: contain;
  will-change: transform;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.45));
}

.bounce-item.fading {
  opacity: 0;
  transition: opacity 0.4s ease;
}

/* 狂暴模式：头像闪动 + 抖动 + 全屏锁交互遮罩 */
.frenzy-flash {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  z-index: 6;
  opacity: 0;
  pointer-events: none;
  display: none;
}
.frenzy-flash.on {
  display: block;
  animation: frenzyFlash 0.33s steps(1) infinite;
}
@keyframes frenzyFlash {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

#avatarStage.frenzy {
  animation: frenzyShake 0.08s linear infinite;
}
@keyframes frenzyShake {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(-5px, 3px) rotate(-1.2deg); }
  50% { transform: translate(4px, -4px) rotate(1.2deg); }
  75% { transform: translate(-3px, 4px) rotate(-0.6deg); }
}

.frenzy-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: transparent;
  display: none;
  cursor: wait;
}
.frenzy-overlay.on {
  display: block;
}

.avatar-layers {
  position: absolute;
  inset: 0;
}

.avatar-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  -webkit-user-drag: none;
  user-drag: none;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  background: linear-gradient(135deg, var(--rose-deep), var(--rose-light));
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 44px rgba(220, 38, 38, 0.35);
  border: 4px solid rgba(220, 38, 38, 0.4);
}

.avatar-layer[data-index="0"] { z-index: 4; }
.avatar-layer[data-index="1"] { z-index: 3; }
.avatar-layer[data-index="2"] { z-index: 2; }
.avatar-layer[data-index="3"] { z-index: 1; }

.avatar-layer.dropping {
  animation: avatarDrop 1.15s cubic-bezier(0.45, 0.02, 0.75, 0.55) forwards;
}

@keyframes avatarDrop {
  0%   { transform: translate3d(0, 0, 0) rotate(0deg) scale(1); opacity: 1; }
  18%  { transform: translate3d(0, -16px, 0) rotate(-7deg) scale(1.03); opacity: 1; }
  100% { transform: translate3d(0, 74vh, 0) rotate(26deg) scale(0.82); opacity: 0; }
}

/* 时钟表盘 */
.clock-veil {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 340px;
  height: 340px;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
  z-index: 5;
}

.clock-veil::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(226, 200, 255, 0.14) 0%, rgba(226, 200, 255, 0.05) 46%, transparent 66%);
}

.clock-veil.on {
  animation: veilPulse 2.6s ease-in-out infinite;
}

.clock-veil svg {
  position: relative;
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 0 10px rgba(226, 200, 255, 0.7));
}

.clock-veil .hand {
  transform-box: view-box;
  transform-origin: 100px 100px;
}

.clock-veil .hand line.glow {
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.95));
}

.clock-veil .hand-h { animation: clockBack 24s linear infinite; }
.clock-veil .hand-m { animation: clockBack 7s linear infinite; }
.clock-veil .hand-s { animation: clockBack 4.5s linear infinite; }

@keyframes clockBack {
  from { transform: rotate(0deg); }
  to { transform: rotate(-360deg); }
}

@keyframes veilPulse {
  0%, 100% { opacity: 0.45; }
  45% { opacity: 1; }
}

/* 转圈时除头像外的整屏渐亮 */
.hero-glow {
  position: fixed;
  inset: 0;
  background: #fff;
  opacity: 0;
  pointer-events: none;
  z-index: 150;
  will-change: opacity;
}

/* 最后一刻盖在头像上面的白光 */
.hero-flash {
  position: fixed;
  inset: 0;
  background: #fff;
  opacity: 0;
  pointer-events: none;
  z-index: 260;
  transition: opacity 0.8s ease;
  will-change: opacity;
}

.hero-flash.on {
  opacity: 1;
}

/* 进入 page4 时的白光淡出 */
.page-bloom {
  position: fixed;
  inset: 0;
  background: #fff;
  pointer-events: none;
  z-index: 9000;
  animation: pageBloomOut 6.3s ease 0.05s forwards;
}

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

.hero h1 {
  font-size: 42px;
  letter-spacing: 2px;
  color: #f7edff;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, #fce8e8 0%, #f5d6d6 42%, #DC2626 100%);
  filter: drop-shadow(0 8px 28px rgba(220, 38, 38, 0.45));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  margin-top: 14px;
  font-size: 17px;
  color: var(--text-light);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  max-width: 1000px;
  margin: 48px auto 80px;
  padding: 0 24px;
}

.card {
  background: var(--card);
  backdrop-filter: blur(6px);
  border-radius: 24px;
  padding: 36px 28px;
  text-decoration: none;
  color: var(--text);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  border: 1px solid rgba(220, 38, 38, 0.22);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55), 0 0 36px rgba(220, 38, 38, 0.32);
  border-color: rgba(220, 38, 38, 0.45);
}

.card .icon {
  width: 96px;
  height: 96px;
  margin: 0 auto 18px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 3px solid rgba(248, 113, 113, 0.5);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45), 0 0 18px rgba(248, 113, 113, 0.25);
}

.card h2 {
  font-size: 21px;
  margin-bottom: 10px;
  color: #f4e9ff;
}

.card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 子页面通用 ===== */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.page-title {
  text-align: center;
  margin-bottom: 36px;
}

.page-title h1 {
  font-size: 34px;
  background: linear-gradient(135deg, #fce8e8 0%, #f5d6d6 42%, #DC2626 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  filter: drop-shadow(0 8px 28px rgba(220, 38, 38, 0.45));
}

.page-title p {
  margin-top: 8px;
  color: var(--text-light);
  font-size: 15px;
}

/* ===== 点歌页 ===== */
.search-box {
  position: relative;
  max-width: 560px;
  margin: 0 auto 32px;
}

.search-box input {
  width: 100%;
  padding: 16px 52px 16px 24px;
  font-size: 16px;
  border: 2px solid rgba(220, 38, 38, 0.3);
  border-radius: 999px;
  outline: none;
  background: rgba(26, 14, 42, 0.78);
  transition: all 0.25s;
  color: var(--text);
}

.search-box input::placeholder {
  color: rgba(195, 174, 222, 0.55);
}

.search-box input:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.18), 0 0 28px rgba(220, 38, 38, 0.28);
}

.search-box .search-icon {
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--pink);
  pointer-events: none;
}

.song-count {
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.song-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}

.song-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--card);
  border-radius: 16px;
  padding: 14px 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(220, 38, 38, 0.2);
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.song-item .song-name {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.song-item .song-name .note {
  color: #E11D48;
  font-size: 18px;
}

.btn-order {
  flex-shrink: 0;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  padding: 9px 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--rose-deep), var(--rose-light));
  box-shadow: 0 4px 12px rgba(127, 29, 29, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.btn-order:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 18px rgba(127, 29, 29, 0.55);
}

.btn-order.copied {
  background: linear-gradient(135deg, #4ade80, #22c55e);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.35);
}

.empty-tip {
  text-align: center;
  color: var(--text-light);
  padding: 48px 0;
  font-size: 15px;
}

/* 复制成功提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 48px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(43, 24, 68, 0.94);
  color: #fce8e8;
  padding: 12px 28px;
  border-radius: 999px;
  border: 1px solid rgba(220, 38, 38, 0.32);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 28px 0 36px;
  color: rgba(226, 212, 245, 0.42);
  font-size: 13px;
}

/* ===== 页面 4：自动放映的卡片与信纸 ===== */
html.show-lock { scrollbar-width: none; }
html.show-lock::-webkit-scrollbar { width: 0; height: 0; }

.show-stage { padding: 0 24px; }

.intro {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
  gap: 18px;
  opacity: 1;
}

.intro-line {
  font-size: clamp(26px, 4.2vw, 52px);
  font-weight: 700;
  color: #fce8e8;
  letter-spacing: 2px;
  line-height: 1.5;
  text-shadow: 0 2px 24px rgba(220, 38, 38, 0.5);
  visibility: hidden;
}

.intro-counter {
  margin: 12px 0;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.intro-counter #elapsed {
  font-size: clamp(30px, 5vw, 64px);
  font-weight: 800;
  color: #E11D48;
  font-variant-numeric: tabular-nums;
  letter-spacing: 3px;
  text-shadow: 0 0 28px rgba(220, 38, 38, 0.65);
}

.intro-story {
  font-size: clamp(22px, 3.4vw, 42px);
  color: #E11D48;
}

.show-round {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}

.show-round .pair {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 104px;
}

.show-round:nth-child(odd) .pair { transform: translateX(-26px); }
.show-round:nth-child(even) .pair { transform: translateX(26px); }

.p4-slot {
  filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.5));
  animation: p4Float var(--p4-dur, 10s) ease-in-out var(--p4-delay, 0s) infinite;
  will-change: transform;
}

.show-round .p4-slot:nth-child(1) {
  margin-top: 0;
  --p4-rot: -2.2deg; --p4-tilt: 1.6deg; --p4-dx: -6px; --p4-dy: 18px;
  --p4-dur: 10.5s; --p4-delay: -1.2s;
}

.show-round .p4-slot:nth-child(2) {
  margin-top: 138px;
  --p4-rot: 2deg; --p4-tilt: -1.8deg; --p4-dx: 8px; --p4-dy: 24px;
  --p4-dur: 13s; --p4-delay: -5s;
}

.show-round:nth-child(even) .p4-slot:nth-child(1) {
  --p4-rot: 1.8deg; --p4-tilt: -1.4deg; --p4-dx: 5px; --p4-dy: 21px;
  --p4-dur: 12s; --p4-delay: -3.4s;
}

.show-round:nth-child(even) .p4-slot:nth-child(2) {
  --p4-rot: -2.4deg; --p4-tilt: 2deg; --p4-dx: -8px; --p4-dy: 16px;
  --p4-dur: 9.5s; --p4-delay: -0.6s;
}

@keyframes p4Float {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(var(--p4-rot, 0deg)); }
  50% { transform: translate3d(var(--p4-dx, 6px), calc(var(--p4-dy, 18px) * -1), 0)
    rotate(calc(var(--p4-rot, 0deg) + var(--p4-tilt, 1.4deg))); }
}

.p4-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px;
  overflow: hidden;
  opacity: 0;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 1s cubic-bezier(0.22, 0.9, 0.24, 1), opacity 0.3s ease;
  will-change: clip-path;
}

.p4-slot.dir-right .p4-card { clip-path: inset(0 0 0 100%); }

.p4-card.open,
.p4-slot.dir-right .p4-card.open {
  opacity: 1;
  clip-path: inset(0 0 0 0);
}

.p4-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.55s ease 0.32s, transform 0.55s ease 0.32s;
}

.p4-card.open .p4-card-body {
  opacity: 1;
  transform: none;
}

.p4-card.p4-blank {
  width: 400px;
  height: auto;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(220, 38, 38, 0.32);
  background:
    radial-gradient(circle at 22% 12%, rgba(220, 38, 38, 0.35), transparent 46%),
    linear-gradient(160deg, rgba(50, 8, 12, 0.95) 0%, rgba(30, 5, 8, 0.96) 58%, rgba(18, 3, 5, 0.97) 100%);
  box-shadow: inset 0 0 46px rgba(127, 29, 29, 0.25);
  color: #f5e6e6;
}

.p4-photo {
  flex: 0 0 auto;
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
}

.p4-card.p4-letter {
  width: 430px;
  height: 520px;
  border-radius: 5px 14px 7px 16px;
  border: 1px solid rgba(108, 76, 38, 0.5);
  color: #3f2c16;
  background:
    repeating-linear-gradient(180deg, transparent 0 43px, rgba(108, 76, 38, 0.12) 43px 44px),
    radial-gradient(circle at 16% 10%, rgba(112, 78, 36, 0.2), transparent 36%),
    radial-gradient(circle at 86% 76%, rgba(112, 78, 36, 0.16), transparent 32%),
    radial-gradient(circle at 62% 32%, rgba(255, 250, 235, 0.35), transparent 40%),
    repeating-linear-gradient(92deg, rgba(112, 78, 36, 0.04) 0 2px, transparent 2px 7px),
    linear-gradient(160deg, #f5eacd 0%, #e7d5ae 55%, #dcc596 100%);
  box-shadow: inset 0 0 42px rgba(112, 78, 36, 0.22);
}

.p4-card.p4-letter::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(143, 29, 36, 0.26);
  pointer-events: none;
}

.p4-letter-text {
  flex: 1;
  font-family: "Kaiti SC", KaiTi, "STKaiti", "Songti SC", SimSun, serif;
  font-size: 28px;
  line-height: 44px;
  letter-spacing: 0.4px;
  color: #4a3418;
  text-align: justify;
  word-break: break-word;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.p4-letter-text.typing,
.p4-letter-text.shown {
  opacity: 1;
}

.p4-letter-text.typing::after {
  content: "▌";
  margin-left: 1px;
  color: rgba(143, 29, 36, 0.6);
  animation: p4Caret 1s steps(1) infinite;
}

@keyframes p4Caret {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

/* 卷轴 */
.scroll-round {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}

.scroll {
  --scroll-h: 480px;
  position: relative;
  width: min(600px, 90vw);
  margin: 0 auto;
  padding: 22px 0;
}

.scroll-paper {
  position: relative;
  width: 100%;
  height: var(--scroll-h);
  padding: 46px 52px;
  box-sizing: border-box;
  border-radius: 4px;
  overflow: hidden;
  color: #3f2c16;
  background:
    repeating-linear-gradient(180deg, transparent 0 43px, rgba(108, 76, 38, 0.12) 43px 44px),
    radial-gradient(circle at 16% 10%, rgba(112, 78, 36, 0.2), transparent 36%),
    radial-gradient(circle at 86% 76%, rgba(112, 78, 36, 0.16), transparent 32%),
    radial-gradient(circle at 62% 32%, rgba(255, 250, 235, 0.35), transparent 40%),
    repeating-linear-gradient(92deg, rgba(112, 78, 36, 0.04) 0 2px, transparent 2px 7px),
    linear-gradient(160deg, #f5eacd 0%, #e7d5ae 55%, #dcc596 100%);
  box-shadow: inset 0 0 42px rgba(112, 78, 36, 0.22), 0 18px 40px rgba(0, 0, 0, 0.45);
  clip-path: inset(0 0 100% 0);
  transition: clip-path 1.5s cubic-bezier(0.22, 0.9, 0.24, 1);
}

.scroll.open .scroll-paper { clip-path: inset(0 0 0 0); }

.scroll-rod {
  position: absolute;
  left: -18px;
  right: -18px;
  height: 18px;
  border-radius: 999px;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(90deg, #1a0507 0%, #7F1D1D 28%, #DC2626 50%, #7F1D1D 72%, #1a0507 100%);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.scroll-rod::before,
.scroll-rod::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 26px;
  height: 26px;
  margin-top: -13px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #D4AF37, #7F1D1D 62%, #1a0507);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.45);
}

.scroll-rod::before { left: -10px; }
.scroll-rod::after { right: -10px; }

.scroll-rod.top { top: 13px; }

.scroll-rod.bottom {
  top: 13px;
  transition: transform 1.5s cubic-bezier(0.22, 0.9, 0.24, 1);
}

.scroll.open .scroll-rod.bottom { transform: translateY(var(--scroll-h)); }

.scroll-text {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Kaiti SC", KaiTi, "STKaiti", "Songti SC", SimSun, serif;
  font-size: 30px;
  line-height: 46px;
  letter-spacing: 2px;
  color: #4a3418;
  text-align: center;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.scroll-text.typing,
.scroll-text.shown { opacity: 1; }

.scroll-text.typing::after {
  content: "▌";
  margin-left: 2px;
  color: rgba(143, 29, 36, 0.6);
  animation: p4Caret 1s steps(1) infinite;
}

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .show-stage { padding: 0 16px; }
  .show-round { padding: 24px 0; }
  .show-round .pair {
    flex-direction: column;
    gap: 24px;
    transform: none;
  }
  .show-round:nth-child(odd) .pair,
  .show-round:nth-child(even) .pair { transform: none; }
  .p4-slot {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  .show-round .p4-slot:nth-child(1),
  .show-round .p4-slot:nth-child(2) { margin-top: 0; }
  .p4-card.p4-letter { width: min(430px, 100%); height: 470px; }
  .p4-card.p4-blank { width: min(400px, 100%); height: auto; }
  .scroll { --scroll-h: 420px; width: min(560px, calc(100vw - 48px)); }
  .scroll-paper { padding: 36px 30px; }
}

@media (max-width: 640px) {
  .nav { padding: 12px 16px; }
  .nav-links a { padding: 7px 12px; font-size: 14px; }
  .hero { padding: 56px 16px 24px; }
  .hero h1 { font-size: 32px; }
  .page { padding: 36px 16px 60px; }
  .page-title h1 { font-size: 26px; }
  .p4-card { padding: 22px; }
  .p4-card.p4-blank { height: auto; }
  .scroll { --scroll-h: 380px; width: calc(100vw - 44px); }
  .scroll-paper { padding: 30px 22px; }
  .scroll-text { font-size: 24px; line-height: 40px; letter-spacing: 1px; }
  .pc-tip { display: block; }
}

/* 手机精简导航 */
@media (max-width: 640px) {
  .nav { gap: 8px; padding: 10px 12px; }
  .nav .logo { font-size: 18px; letter-spacing: 0; }
  .nav-links { gap: 2px; }
  .nav-links a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 8px 9px;
    font-size: 13px;
  }
}

@media (max-width: 380px) {
  .nav { padding: 8px 10px; }
  .nav .logo { font-size: 16px; }
  .nav-links a { padding: 8px 6px; font-size: 12px; }
}

@media (max-width: 768px) {
  .cards { padding: 0 16px; gap: 20px; }
}

@media (max-width: 1180px) and (min-width: 641px) {
  .page { padding-left: 28px; padding-right: 28px; }
  .cards { padding: 0 32px; gap: 24px; }
}

.pc-tip {
  display: none;
  margin: 4px 24px 30px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: rgba(226, 212, 245, 0.55);
}

@media (max-width: 768px) {
  .pc-tip { display: block; }
}

/* 动态视口高度 */
@supports (min-height: 100dvh) {
  .intro,
  .show-round,
  .scroll-round { min-height: 100dvh; }
}

/* 安全区 */
@supports (padding: env(safe-area-inset-top)) {
  @media (max-width: 768px) {
    .nav { padding-top: max(10px, env(safe-area-inset-top)); }
    .footer { padding-bottom: calc(36px + env(safe-area-inset-bottom)); }
  }
}

/* 纪念页：内容占位 */
.coming-soon {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}

.coming-soon-text {
  font-size: clamp(18px, 3vw, 26px);
  letter-spacing: 0.18em;
  color: var(--text-light);
  text-align: center;
  padding: 42px 56px;
  border: 1px solid rgba(248, 113, 113, 0.35);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(248, 113, 113, 0.12);
}

/* ===== 表情包页 ===== */
.meme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 22px;
  max-width: 1240px;
  margin: 34px auto 0;
}

.meme-card {
  position: relative;
  aspect-ratio: 3 / 4;
  perspective: 1400px;
  cursor: pointer;
}

.meme-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.85s cubic-bezier(0.22, 0.68, 0.32, 1);
}

.meme-card.flipped .meme-inner {
  transform: rotateY(180deg);
}

.meme-face {
  position: absolute;
  inset: 0;
  border-radius: 16px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border: 1px solid rgba(248, 113, 113, 0.28);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5);
}

.meme-front {
  background: rgba(30, 6, 9, 0.9);
}

.meme-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.meme-card:hover .meme-face {
  border-color: rgba(248, 113, 113, 0.6);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.55), 0 0 22px rgba(248, 113, 113, 0.22);
}

.meme-back {
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 18%, rgba(248, 113, 113, 0.22), transparent 62%),
    linear-gradient(160deg, rgba(52, 10, 14, 0.96), rgba(16, 3, 5, 0.98));
}

.meme-tip {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: rgba(245, 230, 230, 0.72);
}

.meme-btn {
  padding: 13px 26px;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: #fff5f5;
  border: 1px solid rgba(248, 113, 113, 0.7);
  border-radius: 999px;
  background: linear-gradient(140deg, rgba(185, 28, 28, 0.95), rgba(248, 113, 113, 0.9));
  box-shadow: 0 8px 22px rgba(185, 28, 28, 0.4);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.meme-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(248, 113, 113, 0.5);
}

.meme-btn:active {
  transform: translateY(0) scale(0.97);
}

/* 手机 / 平板：不开放 */
.meme-blocked {
  max-width: 560px;
  margin: 60px auto 0;
  padding: 54px 32px;
  text-align: center;
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.meme-blocked-icon {
  font-size: 46px;
  margin-bottom: 18px;
}

.meme-blocked-title {
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: 12px;
}

.meme-blocked-desc {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 230, 230, 0.62);
}

@media (max-width: 1023px) {
  .meme-grid { display: none !important; }
}

/* ===== 表情包页主题：淡蓝主色 · 白色陪衬 ===== */
body.memes-theme {
  background:
    radial-gradient(900px 620px at 50% -10%, #ffffff, transparent 70%),
    radial-gradient(760px 620px at 8% 22%, rgba(147, 197, 253, 0.5), transparent 72%),
    radial-gradient(820px 640px at 92% 80%, rgba(186, 230, 253, 0.62), transparent 72%),
    linear-gradient(180deg, #eaf4ff 0%, #f8fcff 48%, #e4f0ff 100%);
  background-attachment: fixed;
  color: #14324f;
}

body.memes-theme .nav {
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(96, 165, 250, 0.2);
  box-shadow: 0 2px 18px rgba(59, 130, 246, 0.14);
}

body.memes-theme .nav .logo { color: #1d4ed8; }
body.memes-theme .nav .logo span { color: #60a5fa; }
body.memes-theme .nav-links a { color: #48729e; }
body.memes-theme .nav-links a:hover { background: rgba(96, 165, 250, 0.16); color: #1d4ed8; }
body.memes-theme .nav-links a.active {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  color: #fff;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
}

body.memes-theme .page-title h1 {
  background: linear-gradient(135deg, #93c5fd 0%, #3b82f6 55%, #1d4ed8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 8px 24px rgba(59, 130, 246, 0.28));
}

body.memes-theme .page-title p { color: #5b7fa6; }
body.memes-theme .footer { color: #86a3c0; }

body.memes-theme .meme-face {
  border-color: rgba(96, 165, 250, 0.38);
  box-shadow: 0 10px 28px rgba(59, 130, 246, 0.16);
}

body.memes-theme .meme-front { background: #ffffff; }

body.memes-theme .meme-card:hover .meme-face {
  border-color: rgba(59, 130, 246, 0.66);
  box-shadow: 0 14px 36px rgba(59, 130, 246, 0.26);
}

body.memes-theme .meme-back {
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 255, 255, 0.92), transparent 62%),
    linear-gradient(160deg, #d6ecff 0%, #a9d4f8 100%);
}

body.memes-theme .meme-tip { color: #3d7fb8; }

body.memes-theme .meme-btn {
  color: #1d4ed8;
  border: 1px solid rgba(59, 130, 246, 0.42);
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(59, 130, 246, 0.22);
}

body.memes-theme .meme-btn:hover {
  box-shadow: 0 12px 28px rgba(59, 130, 246, 0.34);
}

body.memes-theme .meme-blocked {
  background: #ffffff;
  border-color: rgba(96, 165, 250, 0.36);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.16);
}

body.memes-theme .meme-blocked-title { color: #1e3a8a; }
body.memes-theme .meme-blocked-desc { color: #5b7fa6; }

body.memes-theme .toast {
  background: rgba(255, 255, 255, 0.96);
  color: #1d4ed8;
  border: 1px solid rgba(96, 165, 250, 0.42);
  box-shadow: 0 8px 28px rgba(59, 130, 246, 0.22);
}

/* ===== 手机 / 平板适配 ===== */
html { -webkit-text-size-adjust: 100%; }
body { overflow-x: hidden; }
.nav-links a,
.btn-order,
.meme-btn { -webkit-tap-highlight-color: transparent; }

/* 触控设备：取消 hover 位移，改为按下反馈 */
@media (hover: none) {
  .card:hover {
    transform: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42);
    border-color: rgba(220, 38, 38, 0.22);
  }
  .card:active { transform: scale(0.985); }
  .btn-order:hover { transform: none; }
  .btn-order:active { transform: scale(0.95); }
  .meme-btn:hover { transform: none; }
  .meme-btn:active { transform: scale(0.96); }
}

/* 平板与窄屏 */
@media (max-width: 1023px) {
  .hero { padding: clamp(36px, 8vw, 68px) 20px 24px; }
  .hero h1 { font-size: clamp(28px, 6vw, 42px); letter-spacing: 1px; }
  .hero p { font-size: 15px; }

  .avatar-stage,
  .hero-avatar {
    width: clamp(104px, 26vw, 140px);
    height: clamp(104px, 26vw, 140px);
  }

  .cards {
    grid-template-columns: 1fr;
    max-width: 520px;
    gap: 18px;
    margin: 36px auto 56px;
    padding: 0 18px;
  }
  .card { padding: 26px 20px; }
  .card .icon { width: 84px; height: 84px; margin-bottom: 14px; }
  .card h2 { font-size: 19px; }

  .page { padding: 32px 16px 64px; }
  .page-title { margin-bottom: 26px; }
  .page-title h1 { font-size: clamp(24px, 5.6vw, 34px); }
  .page-title p { font-size: 14px; }

  .search-box { margin-bottom: 22px; }
  .search-box input { padding: 14px 46px 14px 20px; }
  .song-item { padding: 12px 16px; gap: 12px; }
  .song-item .song-name { font-size: 15px; }
  .btn-order { min-height: 40px; padding: 10px 16px; }

  .toast {
    bottom: 24px;
    width: max-content;
    max-width: calc(100vw - 32px);
    text-align: center;
    font-size: 13px;
  }
}

/* 手机 */
@media (max-width: 640px) {
  .nav-links a { min-height: 44px; }
  .cards { margin: 28px auto 44px; }
  .card .icon { width: 76px; height: 76px; }

  .intro { padding: 40px 18px; gap: 14px; }
  .intro-line { letter-spacing: 1px; line-height: 1.6; }
  .intro-story { font-size: clamp(18px, 5.2vw, 24px); }
  .intro-counter #elapsed { letter-spacing: 1px; }

  .coming-soon { padding: 36px 16px; }
  .coming-soon-text {
    padding: 30px 20px;
    font-size: 16px;
    letter-spacing: 0.08em;
    border-radius: 14px;
  }
}

/* 横屏手机：压缩纵向留白 */
@media (max-height: 520px) and (orientation: landscape) {
  .hero { padding: 20px 20px 14px; }
  .hero h1 { font-size: 24px; }
  .avatar-stage,
  .hero-avatar {
    width: 92px;
    height: 92px;
    margin-bottom: 12px;
  }
  .cards { margin: 18px auto 28px; }
  .nav { padding: 6px 12px; }
}