/* ==================== CSS变量定义 ==================== */
:root {
  /* ==================== 基础尺寸变量 ==================== */
  /** 游戏容器基础宽度 */
  --base-width: 420px;
  /** 游戏容器基础高度 */
  --base-height: 800px;
  /** 响应式缩放因子，用于适配不同屏幕 */
  --scale-factor: 1;
  
  /* ==================== 响应式字体大小 ==================== */
  /** 小号字体，用于辅助信息 */
  --font-size-small: 12px;
  /** 标准字体，用于正文内容 */
  --font-size-normal: 14px;
  /** 大号字体，用于重要信息 */
  --font-size-large: 16px;
  /** 超大字体，用于题目文本 */
  --font-size-xl: 18px;
  /** 特大字体，用于分数显示 */
  --font-size-xxl: 27px;
  
  /* ==================== 响应式间距系统 ==================== */
  /** 超小间距 */
  --spacing-xs: 4px;
  /** 小间距 */
  --spacing-sm: 8px;
  /** 中等间距 */
  --spacing-md: 12px;
  /** 大间距 */
  --spacing-lg: 16px;
  /** 超大间距 */
  --spacing-xl: 20px;
  /** 特大间距 */
  --spacing-xxl: 30px;
  
  /* ==================== 动画配置变量 ==================== */
  /** 动画速度倍数 */
  --animation-speed: 1;
  /** 动画缓动函数 */
  --animation-easing: ease-in-out;
  
  /** 题目文本动画持续时间 */
  --animation-duration-questionText: 1600ms;
  /** 轮次文本动画持续时间 */
  --animation-duration-rankText: 1600ms;
  /** 选项入场动画持续时间 */
  --animation-duration-optionEntrance: 200ms;
  /** 选项缩放入场动画持续时间 */
  --animation-duration-optionScaleIn: 600ms;
  /** 选项弹性入场动画持续时间 */
  --animation-duration-optionBounceIn: 800ms;
  /** 选项退出动画持续时间 */
  --animation-duration-optionExit: 600ms;
  /** 分数弹跳动画持续时间 */
  --animation-duration-scoreBounce: 600ms;
  /** 分数飞行动画持续时间 */
  --animation-duration-scoreFly: 1100ms;
  
  /** 选项动画开始延迟 */
  --animation-delay-optionStart: 1700ms;
  /** 选项间错开延迟 */
  --animation-delay-optionStagger: 100ms;
  /** 选项退出错开延迟 */
  --animation-delay-optionExitStagger: 80ms;
  /** 题目文本开始延迟 */
  --animation-delay-questionTextStart: 0ms;
  /** 轮次文本开始延迟 */
  --animation-delay-rankTextStart: 0ms;
}

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

/* ==================== 页面主体样式 ==================== */
body {
  /* 使用系统字体栈，确保跨平台一致性 */
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  /* 浅灰色背景，提供良好的对比度 */
  background: #f0f0f0;
  /* 确保页面至少占满整个视口高度 */
  min-height: 100vh;
  /* 使用Flexbox实现居中对齐 */
  display: flex;
  justify-content: center;
  align-items: center;
  /* 添加内边距，防止内容贴边 */
  padding: 20px;
  /* 允许水平滚动，适配小屏幕 */
  overflow-x: auto;
}

/* ==================== 游戏容器样式 ==================== */
.quiz-container {
  /* 白色背景，与页面背景形成对比 */
  background: white;
  /* 圆角设计，现代化外观 */
  border-radius: calc(15px * var(--scale-factor));
  /* 阴影效果，增加层次感 */
  box-shadow: 0 calc(4px * var(--scale-factor)) calc(12px * var(--scale-factor)) rgba(0, 0, 0, 0.1);
  /* 使用CSS变量实现响应式尺寸 */
  width: calc(var(--base-width) * var(--scale-factor));
  height: calc(var(--base-height) * var(--scale-factor));
  /* 确保在小屏幕上不会超出视口 */
  max-width: 100vw;
  max-height: 100vh;
  /* 相对定位，为子元素提供定位上下文 */
  position: relative;
  /* 隐藏溢出内容 */
  overflow: hidden;
  /* 设置变换原点为中心，确保缩放效果自然 */
  transform-origin: center;
  /* 平滑的变换过渡效果 */
  transition: transform 0.3s ease;
  /* 允许垂直滚动，处理内容过多的情况 */
  overflow-y: auto;
}

.header {
  background: white;
  padding: calc(var(--spacing-xl) * var(--scale-factor));
  padding-bottom: 0;
  /* 改为三列网格布局，保证计时器永远居中 */
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: #333;
}

.player-info {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-sm) * var(--scale-factor));
  justify-self: start;
}

.avatar {
  width: calc(48px * var(--scale-factor));
  height: calc(48px * var(--scale-factor));
  border-radius: 50%;
  background: #2196F3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: white;
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar svg {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.player-score {
  font-size: calc(var(--font-size-xxl) * var(--scale-factor));
  font-weight: bold;
  color: #2196f3;
  padding-right: calc(36px * var(--scale-factor));
  text-align: center;
  /* 避免因数字宽度变化导致布局抖动 */
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
  /* 预留至少4个字符宽度空位，防止位数变化撑开 */
  min-width: 3ch;
}

.timer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(5px * var(--scale-factor));
  justify-self: center; /* 中间列永远居中 */
}

.timer-circle {
  width: calc(80px * var(--scale-factor));
  height: calc(80px * var(--scale-factor));
  border-radius: 50%;
  background: transparent;
  border: calc(14px * var(--scale-factor)) solid #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(22px * var(--scale-factor));
  font-weight: bold;
  color: #333;
  position: relative;
  image-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: transform 0.2s ease-in-out, box-shadow 0.3s ease-in-out, border-color 0.3s ease-in-out;
}

.timer-progress {
  position: absolute;
  top: calc(-14px * var(--scale-factor));
  left: calc(-14px * var(--scale-factor));
  width: calc(80px * var(--scale-factor));
  height: calc(80px * var(--scale-factor));
  border-radius: 50%;
  background: conic-gradient(#2196F3 0deg 0deg, transparent 0deg 360deg);
  transition: background 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  mask: radial-gradient(circle at center, transparent calc(24px * var(--scale-factor)), transparent calc(24px * var(--scale-factor)), black calc(25px * var(--scale-factor)), black calc(40px * var(--scale-factor)));
  -webkit-mask: radial-gradient(circle at center, transparent calc(24px * var(--scale-factor)), transparent calc(24px * var(--scale-factor)), black calc(25px * var(--scale-factor)), black calc(40px * var(--scale-factor)));
  image-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  --progress-angle: 0deg;
}

.timer-circle.warning .timer-progress {
  background: conic-gradient(#35AC59 0deg 0deg, transparent 0deg 360deg);
}

.timer-circle.danger .timer-progress {
  background: conic-gradient(#FBAF00 0deg 0deg, transparent 0deg 360deg);
}

.timer-circle span {
  color: #333;
}

progress {
  display: none;
}
::-webkit-scrollbar {
  width: 0px;
  height: 0px;
}
.timer-label {
  font-size: calc(var(--font-size-small) * var(--scale-factor));
  opacity: 0.8;
}

.opponent-info {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-sm) * var(--scale-factor));
  justify-self: end;
}

.opponent-avatar {
  width: calc(48px * var(--scale-factor));
  height: calc(48px * var(--scale-factor));
  border-radius: 50%;
  background: #FBC109;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: calc(var(--font-size-xl) * var(--scale-factor));
  color: white;
  overflow: hidden;
  position: relative;
}

.opponent-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.opponent-avatar svg {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.opponent-score {
  text-align: center;
}

/* 头像选择模态框样式 */
.avatar-modal-content {
  max-width: 500px;
  width: 90%;
}

.current-avatar-section {
  text-align: center;
  margin-bottom: 20px;
}

.current-avatar-label {
  font-size: 14px;
  color: #666;
  margin-bottom: 10px;
}

.current-avatar-display {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #FBC109;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  overflow: hidden;
  border: 3px solid #ddd;
  position: relative;
}

.current-avatar-display img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.current-avatar-display svg {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.avatar-grid-section {
  margin-bottom: 20px;
}

.avatar-grid-label {
  font-size: 14px;
  color: #666;
  margin-bottom: 10px;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 15px;
}

.avatar-option {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s ease;
  overflow: hidden;
  position: relative;
}

.avatar-option img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar-option svg {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.avatar-option:hover {
  border-color: #007bff;
  transform: scale(1.05);
}

.avatar-option.selected {
  border-color: #007bff;
  background: #e3f2fd;
}

.avatar-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

.avatar-import-export {
  border-top: 1px solid #eee;
  padding-top: 15px;
}

.import-export-label {
  font-size: 14px;
  color: #666;
  margin-bottom: 10px;
}

.import-export-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn-outline {
  background: white;
  border: 1px solid #007bff;
  color: #007bff;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-outline:hover {
  background: #007bff;
  color: white;
}

.score-number {
  font-size: calc(var(--font-size-xxl) * var(--scale-factor));
  font-weight: bold;
  color: #2196f3;
  /* 避免因数字宽度变化导致布局抖动 */
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
  /* 预留至少4个字符宽度空位，防止位数变化撑开 */
  min-width: 3ch;
  display: inline-block;
  text-align: center;
}
.question-section {
  
  margin-top: calc(100px * var(--scale-factor));
  padding: calc(var(--spacing-xxl) * var(--scale-factor)) 0;
  text-align: center;
  display: flex;
  align-items: center;
  position: relative;
}

.question-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  
  margin-top: calc(var(--spacing-xxl) * var(--scale-factor));
}

.progress-bar {
  width: calc(15px * var(--scale-factor));
  height: calc(420px * var(--scale-factor));
  background: #E8F2FE;
  border-radius: calc(10px * var(--scale-factor));
  position: absolute;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  top: 65%;
  transform: translateY(-50%);
}

.left-progress {
  left: calc(var(--spacing-sm) * var(--scale-factor));
}

.right-progress {
  right: calc(var(--spacing-sm) * var(--scale-factor));
}

.progress-fill {
  width: 100%;
  background: #1686EA;
  border-radius: calc(10px * var(--scale-factor));
  transition: height 0.3s ease;
  min-height: 0;
}


.question-text {
  font-size: calc(var(--font-size-xl) * var(--scale-factor));
  line-height: 1.6;
  color: #333;
  margin-bottom: calc(var(--spacing-xxl) * var(--scale-factor));
  font-weight: bolder;
  opacity: 0;
  /* 移除自动动画，由JavaScript控制 */
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: calc(14px * var(--scale-factor));
  transform: translateY(calc(35px * var(--scale-factor)));
  height: calc(240px * var(--scale-factor));
  justify-content: space-between;
  
  margin-top: calc(80px * var(--scale-factor));
  align-items: center; /* 让固定宽度的选项在容器中居中 */
}

.option {
  border: calc(2px * var(--scale-factor)) solid #ABD6FA;
  border-radius: calc(8px * var(--scale-factor));
  padding: calc(8px * var(--scale-factor)) calc(36px * var(--scale-factor));
  padding-left: calc(36px * var(--scale-factor)); /* 为左侧图标留出更宽空间，避免与文本/缩放冲突 */
  padding-right: calc(36px * var(--scale-factor)); /* 为右侧图标留出更宽空间 */
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: calc(340px * var(--scale-factor)); /* 固定按钮宽度 */
  height: calc(50px * var(--scale-factor)); /* 固定按钮高度 */
  opacity: 0;
  font-weight: bold;
  transform: scale(2.5); /* 从更大的缩放开始，为缩放入场动画做准备 */
  overflow: hidden; /* 防止文本溢出 */
  /* 移除自动动画，由JavaScript控制 */
}

/* 选项动画延迟现在由JavaScript控制，移除CSS动画延迟 */

/* 只在非触摸设备上应用hover效果，避免移动端点击后hover状态残留 */
@media (hover: hover) and (pointer: fine) {
  .option:hover {
    border-color: #2196f3;
  }
  
  .option.selected:hover {
    background: #e3f2fd;
    border-color: #2196f3;
  }
}

.option:focus {
  outline: none;
  border-color: #2196f3;
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

.option.selected {
  background: #e3f2fd;
  border-color: #2196f3;
}

.option.selected:focus {
  background: #e3f2fd;
  border-color: #2196f3;
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.3);
}

/* 移动端触摸反馈 */
@media (hover: none) and (pointer: coarse) {
  .option:active,
  .option.touch-active {
    background: #f0f8ff;
    border-color: #2196f3;
    transform: scale(0.98);
    transition: all 0.1s ease;
  }
  
  .option.selected:active,
  .option.selected.touch-active {
    background: #d1e7ff;
    border-color: #1976d2;
    transform: scale(0.98);
  }
}

/* 当有选项被选中时，移除所有选项的边框，只保留选中项的边框 */
.options-container.has-selection .option {
  border-color: transparent;
}

.options-container.has-selection .option.selected {
  border-color: #2196f3;
}


.player-selection-icon {
  position: absolute;
  left: calc(12px * var(--scale-factor));
  top: 50%;
  transform: translateY(-50%);
  width: calc(22px * var(--scale-factor));
  height: calc(22px * var(--scale-factor));
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.player-selection-icon svg {
  width: 100%;
  height: 100%;
}

/* 正确答案图标样式 */
.player-selection-icon.correct svg {
  fill: #4CAF50;
}

/* 错误答案图标样式 */
.player-selection-icon.incorrect svg {
  fill: #F44336;
}

.option-text {
  font-size: calc(var(--font-size-large) * var(--scale-factor)* 0.9);
  color: #333;
  text-align: left;
  flex: 1;
  white-space: nowrap; /* 确保文本不换行，配合text-overflow使用 */
  overflow: hidden; /* 隐藏溢出文本 */
  text-overflow: ellipsis; /* 文本过长时显示省略号 */
}

.opponent-result {
  position: absolute;
  right: calc(12px * var(--scale-factor));
  top: 50%;
  transform: translateY(-50%) scale(0.5);
  width: calc(22px * var(--scale-factor));
  height: calc(22px * var(--scale-factor));
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.opponent-result.show {
  opacity: 1;
  transform: translateY(-50%) scale(1);
}

.opponent-result svg {
  width: 100%;
  height: 100%;
}

.opponent-result.correct svg {
  fill: #4CAF50;
}

.opponent-result.incorrect svg {
  fill: #F44336;
}

/* 结束界面样式 */
.end-screen {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.98);
  z-index: 10;
  padding: calc(20px * var(--scale-factor));
}

.end-title {
  font-size: calc(28px * var(--scale-factor));
  color: #2196F3;
  margin-bottom: calc(12px * var(--scale-factor));
}

.end-emoji {
  font-size: calc(56px * var(--scale-factor));
  color: #2196F3;
  margin-bottom: calc(32px * var(--scale-factor));
}

.cta-button.primary {
  width: 80%;
  max-width: 520px;
  height: calc(48px * var(--scale-factor));
  border-radius: calc(8px * var(--scale-factor));
  border: none;
  color: #fff;
  background-color: #2196F3;
  font-size: calc(18px * var(--scale-factor));
  cursor: pointer;
}

.cta-button.primary:active {
  transform: translateY(1px);
}

.controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  padding: calc(12px * var(--scale-factor)) calc(var(--spacing-xl) * var(--scale-factor));
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: white;
}

.time-display {
  font-size: calc(var(--font-size-large) * var(--scale-factor));
  font-weight: bold;
}

.control-buttons {
  display: flex;
  gap: calc(15px * var(--scale-factor));
}

.control-btn {
  width: calc(24px * var(--scale-factor));
  height: calc(24px * var(--scale-factor));
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: calc(var(--font-size-small) * var(--scale-factor));
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.slider-handle {
  position: absolute;
  width: calc(20px * var(--scale-factor));
  height: calc(20px * var(--scale-factor));
  background: #666;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.7;
  pointer-events: none;
}

@keyframes scaleIn {
  0% {
    transform: scale(1.2);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* 加分动画样式 (已更新) */
.score-animation-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
}

  .score-animation-text {
    position: absolute;
    top: 0;
    left: 0;
    font-size: calc(var(--font-size-xxl) * var(--scale-factor));
    font-weight: bold;
    color: #1686EA; /* 使用蓝色 */
    opacity: 0;
    pointer-events: none;
    /* 初始位置由JS通过transform设置 */
    transform: translate(var(--start-x, 0), var(--start-y, 0));
  }

.score-animation-text.animate {
  animation: addScoreAnimation 1.1s ease-in-out forwards;
}

@keyframes addScoreAnimation {
  0% {
    transform: translate(var(--start-x), var(--start-y)) scale(1.5);
    opacity: 0.4;
  }
  15% {
    opacity: 0.4;
    transform: translate(var(--start-x), var(--start-y)) scale(1.5);
  }
  60% {
    transform: translate(var(--end-x), var(--end-y)) scale(1);
    opacity: 1;
  }
  80% {
    transform: translate(var(--end-x), var(--end-y)) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(var(--end-x), calc(var(--end-y) - 30px)) scale(0.8);
    opacity: 0;
  }
}

.player-score.animate-tick,
.score-number.animate-tick {
  animation: scoreBounce 0.6s ease-out;
}

@keyframes scoreBounce {
  0% { transform: scale(1); }
  25% { transform: scale(1.2); }
  50% { transform: scale(0.9); }
  75% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* 标题动画样式 */
.rank-text {
  text-align: center;
  font-size: calc(var(--font-size-xxl) * var(--scale-factor) * 0.8);
  font-weight: bold;
  color: #333;
  opacity: 0;
  pointer-events: none;
  padding-top: calc(32px * var(--scale-factor));
  /* margin: calc(var(--spacing-sm) * var(--scale-factor)) 0; */
  height: calc(30px * var(--scale-factor));
  display: flex;
  align-items: center;
  justify-content: center;
}

.rank-text.animate {
  animation: rankTextAnimation 1.6s ease-in-out forwards;
}

@keyframes rankTextAnimation {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }
  25% {
    opacity: 1;
    transform: scale(1);
  }
  75% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1);
  }
}

@keyframes questionTextAnimation {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  25% {
    opacity: 1;
    transform: scale(1);
  }
  75% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.option.animate-in {
  opacity: 1;
  transform: scale(1);
}

/* 选项按钮逐个缩放入场动画 */
.option.animate-scale-in {
  animation: optionScaleInAnimation 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes optionScaleInAnimation {
  0% {
    opacity: 0;
    transform: scale(2.5);
  }
  20% {
    opacity: 0.3;
    transform: scale(1.8);
  }
  40% {
    opacity: 0.6;
    transform: scale(1.2);
  }
  60% {
    opacity: 0.8;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* 选项按钮弹性缩放入场动画（备用方案） */
.option.animate-bounce-in {
  animation: optionBounceInAnimation 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

@keyframes optionBounceInAnimation {
  0% {
    opacity: 0;
    transform: scale(3) rotate(5deg);
  }
  15% {
    opacity: 0.2;
    transform: scale(2.2) rotate(-3deg);
  }
  30% {
    opacity: 0.4;
    transform: scale(1.5) rotate(2deg);
  }
  45% {
    opacity: 0.6;
    transform: scale(1.1) rotate(-1deg);
  }
  60% {
    opacity: 0.8;
    transform: scale(0.9) rotate(0.5deg);
  }
  75% {
    opacity: 0.9;
    transform: scale(1.1) rotate(-0.2deg);
  }
  90% {
    opacity: 0.95;
    transform: scale(0.98) rotate(0.1deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

/* 选项退出动画样式 */
.option.animate-out {
  animation: optionExitAnimation 0.6s ease-in-out forwards;
}

@keyframes optionExitAnimation {
  0% {
    opacity: .8;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-12px);
  }
}

/* ==================== 底部声明样式 ==================== */
.footer-attribution {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  z-index: 5;
  padding: calc(var(--spacing-md) * var(--scale-factor));
  font-size: calc(var(--font-size-small) * var(--scale-factor));
  color: #666;
  line-height: 1.4;
  
}

.footer-links {
  margin-top: calc(var(--spacing-xs) * var(--scale-factor));
}

.footer-links a {
  color: #2196F3;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #1976D2;
  text-decoration: underline;
}

/* ==================== 模态框样式 ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.modal-overlay.show {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: calc(12px * var(--scale-factor));
  box-shadow: 0 calc(8px * var(--scale-factor)) calc(32px * var(--scale-factor)) rgba(0, 0, 0, 0.2);
  max-width: calc(400px * var(--scale-factor));
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(var(--spacing-lg) * var(--scale-factor));
  border-bottom: 1px solid #eee;
}

.modal-header h3 {
  margin: 0;
  font-size: calc(var(--font-size-large) * var(--scale-factor));
  color: #333;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: calc(24px * var(--scale-factor));
  color: #666;
  cursor: pointer;
  padding: 0;
  width: calc(32px * var(--scale-factor));
  height: calc(32px * var(--scale-factor));
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.2s ease;
}

.modal-close:hover {
  background-color: #f5f5f5;
  color: #333;
}

.modal-body {
  padding: calc(var(--spacing-lg) * var(--scale-factor));
}

.setting-group {
  margin-bottom: calc(var(--spacing-lg) * var(--scale-factor));
}

.setting-group:last-child {
  margin-bottom: 0;
}

.setting-label {
  display: block;
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: #333;
  font-weight: 500;
  margin-bottom: calc(var(--spacing-sm) * var(--scale-factor));
}

.setting-input {
  width: 100%;
  padding: calc(var(--spacing-sm) * var(--scale-factor));
  border: 1px solid #ddd;
  border-radius: calc(6px * var(--scale-factor));
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.setting-input:focus {
  outline: none;
  border-color: #2196F3;
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

.setting-input.input-error {
  border-color: #F44336;
  background-color: #ffebee;
  box-shadow: 0 0 0 2px rgba(244, 67, 54, 0.2);
}

.setting-input.input-error:focus {
  border-color: #F44336;
  box-shadow: 0 0 0 2px rgba(244, 67, 54, 0.3);
}

.speed-inputs {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-sm) * var(--scale-factor));
}

.speed-inputs .setting-input {
  flex: 1;
}

.speed-separator {
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: #666;
  font-weight: 500;
}

.setting-description {
  font-size: calc(var(--font-size-small) * var(--scale-factor));
  color: #666;
  margin-top: calc(var(--spacing-xs) * var(--scale-factor));
  line-height: 1.4;
}

/* 勾选框设置样式 */
.checkbox-setting {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-sm) * var(--scale-factor));
  margin-bottom: calc(var(--spacing-sm) * var(--scale-factor));
}

.setting-checkbox {
  width: calc(18px * var(--scale-factor));
  height: calc(18px * var(--scale-factor));
  accent-color: #2196F3;
  cursor: pointer;
}

.checkbox-label {
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: #333;
  cursor: pointer;
  user-select: none;
}

.modal-footer {
  padding: calc(var(--spacing-lg) * var(--scale-factor));
  border-top: 1px solid #eee;
  display: flex;
  gap: calc(var(--spacing-sm) * var(--scale-factor));
  justify-content: flex-end;
}

.btn {
  padding: calc(var(--spacing-sm) * var(--scale-factor)) calc(var(--spacing-lg) * var(--scale-factor));
  border: none;
  border-radius: calc(6px * var(--scale-factor));
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: #2196F3;
  color: white;
}

.btn-primary:hover {
  background-color: #1976D2;
}

.btn-secondary {
  background-color: #f5f5f5;
  color: #666;
}

.btn-secondary:hover {
  background-color: #e0e0e0;
}

/* 响应式调整 */
@media (max-width: 480px) {
  .modal-content {
    width: 95%;
    margin: calc(var(--spacing-sm) * var(--scale-factor));
  }
  
  .modal-footer {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}



.footer-links {
  margin-top: calc(var(--spacing-xs) * var(--scale-factor));
}

a {
  color: #228BE6;
  text-decoration: none;
  font-size: calc(var(--font-size-small) * var(--scale-factor));
  font-weight: 500;
  transition: color 0.2s ease;
}


/* ==================== 头像设置区域样式 ==================== */
.avatar-settings {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-lg) * var(--scale-factor));
  margin-bottom: calc(var(--spacing-lg) * var(--scale-factor));
}

.avatar-setting-item {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-md) * var(--scale-factor));
  padding: calc(var(--spacing-md) * var(--scale-factor));
  border: 1px solid #e0e0e0;
  border-radius: calc(8px * var(--scale-factor));
  background: #fafafa;
  transition: all 0.2s ease;
}

.avatar-setting-item:hover {
  border-color: #2196F3;
  background: #f5f5f5;
}

.avatar-preview {
  flex-shrink: 0;
}

.avatar-preview .avatar,
.avatar-preview .opponent-avatar {
  width: calc(48px * var(--scale-factor));
  height: calc(48px * var(--scale-factor));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: white;
  background: #2196F3;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.avatar-preview .avatar:hover,
.avatar-preview .opponent-avatar:hover {
  transform: scale(1.05);
}

.avatar-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-xs) * var(--scale-factor));
}

.avatar-name {
  font-weight: 500;
  font-size: calc(var(--font-size-normal) * var(--scale-factor));
  color: #333;
}

.avatar-info .btn {
  align-self: flex-start;
  padding: calc(var(--spacing-xs) * var(--scale-factor)) calc(var(--spacing-md) * var(--scale-factor));
  font-size: calc(var(--font-size-small) * var(--scale-factor));
}

@media (max-width: 480px) {
  .quiz-container {
    margin: 10px;
    border-radius: 15px;
  }
  
  .header {
    padding: 15px;
  }
  
  .question-section {
    padding: 20px 15px;
  }
  
  .question-text {
    font-size: calc(var(--font-size-xl) * var(--scale-factor) * 0.9);
  }
  
  .option-text {
    font-size: calc(var(--font-size-large) * var(--scale-factor) * 0.9);
  }
  
  .avatar-setting-item {
    flex-direction: column;
    text-align: center;
  }
  
  .avatar-info {
    align-items: center;
  }
  
  .avatar-info .btn {
    align-self: center;
  }
}