/* ============================================
   辩论赛计时器 - 样式文件
   根据产品计划书设计
   ============================================ */

/* ========== 基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色方案 */
    --color-primary: #2196F3;      /* 蓝色 - 正常状态 */
    --color-warning: #FF9800;      /* 橙色 - 30秒警告 */
    --color-danger: #F44336;       /* 红色 - 时间到 */
    --color-success: #4CAF50;      /* 绿色 - 成功状态 */
    
    /* 背景色 */
    --bg-primary: #F5F5F5;
    --bg-secondary: #FFFFFF;
    --bg-dark: #1E1E1E;
    
    /* 文字颜色 */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #FFFFFF;
    
    /* 边框和阴影 */
    --border-color: #E0E0E0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: 30px;
    position: relative;
    min-height: calc(100vh - 40px);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

/* 全屏模式下的container样式 */
.container:fullscreen,
.container:-webkit-full-screen,
.container:-moz-full-screen,
.container:-ms-fullscreen,
body:fullscreen .container,
body:-webkit-full-screen .container,
body:-moz-full-screen .container,
body:-ms-fullscreen .container,
body.fullscreen-mode .container {
    max-width: 100% !important;
    border-radius: 0 !important;
    min-height: 100vh !important;
    height: 100vh !important;
    padding: 20px !important;
    box-shadow: none !important;
    display: flex !important;
    flex-direction: column !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    justify-content: center !important;
    align-items: center !important;
}

/* 全屏模式下的标题 - 隐藏 */
body:fullscreen .header,
body:-webkit-full-screen .header,
body:-moz-full-screen .header,
body:-ms-fullscreen .header,
body.fullscreen-mode .header,
.container:fullscreen .header,
.container:-webkit-full-screen .header,
.container:-moz-full-screen .header,
.container:-ms-fullscreen .header {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    overflow: hidden !important;
}

body:fullscreen .header h1,
body:-webkit-full-screen .header h1,
body:-moz-full-screen .header h1,
body:-ms-fullscreen .header h1,
body.fullscreen-mode .header h1 {
    display: none !important;
}

/* 全屏模式下的辩题选择区域 - 完全隐藏 */
body:fullscreen .topic-selector,
body:-webkit-full-screen .topic-selector,
body:-moz-full-screen .topic-selector,
body:-ms-fullscreen .topic-selector,
body.fullscreen-mode .topic-selector,
.container:fullscreen .topic-selector,
.container:-webkit-full-screen .topic-selector,
.container:-moz-full-screen .topic-selector,
.container:-ms-fullscreen .topic-selector {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
}

body:fullscreen .topic-selector-main,
body:-webkit-full-screen .topic-selector-main,
body:-moz-full-screen .topic-selector-main,
body:-ms-fullscreen .topic-selector-main,
body.fullscreen-mode .topic-selector-main {
    display: none !important;
}

body:fullscreen .topic-label,
body:-webkit-full-screen .topic-label,
body:-moz-full-screen .topic-label,
body:-ms-fullscreen .topic-label,
body.fullscreen-mode .topic-label {
    font-size: 1rem;
    margin-bottom: 8px;
}

body:fullscreen .topic-select-large,
body:-webkit-full-screen .topic-select-large,
body:-moz-full-screen .topic-select-large,
body:-ms-fullscreen .topic-select-large,
body.fullscreen-mode .topic-select-large {
    font-size: 0.9rem;
    padding: 8px 12px;
}

/* 全屏模式下的模式选择器 - 完全隐藏 */
body:fullscreen .mode-selector,
body:-webkit-full-screen .mode-selector,
body:-moz-full-screen .mode-selector,
body:-ms-fullscreen .mode-selector,
body.fullscreen-mode .mode-selector,
.container:fullscreen .mode-selector,
.container:-webkit-full-screen .mode-selector,
.container:-moz-full-screen .mode-selector,
.container:-ms-fullscreen .mode-selector {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
}

body:fullscreen .mode-label,
body:-webkit-full-screen .mode-label,
body:-moz-full-screen .mode-label,
body:-ms-fullscreen .mode-label,
body.fullscreen-mode .mode-label {
    font-size: 1rem;
    margin-bottom: 8px;
}

body:fullscreen .mode-option,
body:-webkit-full-screen .mode-option,
body:-moz-full-screen .mode-option,
body:-ms-fullscreen .mode-option,
body.fullscreen-mode .mode-option {
    font-size: 0.85rem;
    padding: 5px 0;
}

body:fullscreen .mode-option span,
body:-webkit-full-screen .mode-option span,
body:-moz-full-screen .mode-option span,
body:-ms-fullscreen .mode-option span,
body.fullscreen-mode .mode-option span {
    font-size: 0.85rem;
}

/* 全屏模式下的开始比赛按钮 - 隐藏 */
body:fullscreen .start-match-container,
body:-webkit-full-screen .start-match-container,
body:-moz-full-screen .start-match-container,
body:-ms-fullscreen .start-match-container,
body.fullscreen-mode .start-match-container {
    display: none !important;
}

body:fullscreen .start-match-btn,
body:-webkit-full-screen .start-match-btn,
body:-moz-full-screen .start-match-btn,
body:-ms-fullscreen .start-match-btn,
body.fullscreen-mode .start-match-btn {
    padding: 12px 24px;
    font-size: 1rem;
}

body:fullscreen .btn-icon-large,
body:-webkit-full-screen .btn-icon-large,
body:-moz-full-screen .btn-icon-large,
body:-ms-fullscreen .btn-icon-large,
body.fullscreen-mode .btn-icon-large {
    font-size: 1.2rem;
}

body:fullscreen .btn-text-large,
body:-webkit-full-screen .btn-text-large,
body:-moz-full-screen .btn-text-large,
body:-ms-fullscreen .btn-text-large,
body.fullscreen-mode .btn-text-large {
    font-size: 1rem;
}

/* 全屏模式下的当前阶段信息 - 精简显示 */
body:fullscreen .current-stage,
body:-webkit-full-screen .current-stage,
body:-moz-full-screen .current-stage,
body:-ms-fullscreen .current-stage,
body.fullscreen-mode .current-stage,
.container:fullscreen .current-stage,
.container:-webkit-full-screen .current-stage,
.container:-moz-full-screen .current-stage,
.container:-ms-fullscreen .current-stage {
    margin: 10px 0 !important;
    padding: 10px 20px !important;
    flex-shrink: 0 !important;
    display: block !important;
    visibility: visible !important;
    background: rgba(33, 150, 243, 0.1) !important;
    border-radius: 10px !important;
    text-align: center !important;
    border: 2px solid var(--color-primary) !important;
}

body:fullscreen .current-stage span,
body:-webkit-full-screen .current-stage span,
body:-moz-full-screen .current-stage span,
body:-ms-fullscreen .current-stage span,
body.fullscreen-mode .current-stage span {
    font-size: 1.4rem !important;
    font-weight: 700 !important;
    color: var(--color-primary) !important;
    display: block !important;
    margin: 5px 0 !important;
}

body:fullscreen .speaker-info,
body:-webkit-full-screen .speaker-info,
body:-moz-full-screen .speaker-info,
body:-ms-fullscreen .speaker-info,
body.fullscreen-mode .speaker-info {
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    color: var(--text-primary) !important;
}

body:fullscreen .current-stage span,
body:-webkit-full-screen .current-stage span,
body:-moz-full-screen .current-stage span,
body:-ms-fullscreen .current-stage span,
body.fullscreen-mode .current-stage span {
    font-size: 0.95rem;
}

/* 全屏模式下的时间显示区域优化 - 确保可见并占据主要空间 */
.container:fullscreen .timer-display,
.container:-webkit-full-screen .timer-display,
.container:-moz-full-screen .timer-display,
.container:-ms-fullscreen .timer-display,
body:fullscreen .timer-display,
body:-webkit-full-screen .timer-display,
body:-moz-full-screen .timer-display,
body:-ms-fullscreen .timer-display,
body.fullscreen-mode .timer-display {
    margin: 0 !important;
    padding: 40px 20px !important;
    flex: 1 1 auto !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    min-height: 0 !important;
    height: auto !important;
    max-height: none !important;
    width: 100% !important;
    position: relative !important;
    z-index: 1 !important;
    visibility: visible !important;
    opacity: 1 !important;
    overflow: visible !important;
    background: var(--bg-primary) !important;
    border-radius: 0 !important;
}

.container:fullscreen .time,
.container:-webkit-full-screen .time,
.container:-moz-full-screen .time,
.container:-ms-fullscreen .time,
body:fullscreen .time,
body:-webkit-full-screen .time,
body:-moz-full-screen .time,
body:-ms-fullscreen .time,
body.fullscreen-mode .time {
    font-size: clamp(8rem, 15vw, 20rem) !important;
    line-height: 1.1 !important;
    font-weight: 900 !important;
    letter-spacing: 6px !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    color: var(--color-primary) !important;
    margin-bottom: 20px !important;
    text-shadow: 4px 4px 8px rgba(0, 0, 0, 0.3) !important;
    white-space: nowrap !important;
}

body:fullscreen .team-time-large,
body:-webkit-full-screen .team-time-large,
body:-moz-full-screen .team-time-large,
body:-ms-fullscreen .team-time-large,
body.fullscreen-mode .team-time-large {
    font-size: clamp(3rem, 8vw, 6rem) !important;
    font-weight: 700 !important;
    letter-spacing: 3px !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.2) !important;
}

body:fullscreen .team-time-label,
body:-webkit-full-screen .team-time-label,
body:-moz-full-screen .team-time-label,
body:-ms-fullscreen .team-time-label,
body.fullscreen-mode .team-time-label {
    font-size: 2rem !important;
    margin-bottom: 20px !important;
    font-weight: 700 !important;
}

body:fullscreen .time-label,
body:-webkit-full-screen .time-label,
body:-moz-full-screen .time-label,
body:-ms-fullscreen .time-label,
body.fullscreen-mode .time-label {
    font-size: 2rem !important;
    margin-top: 30px !important;
    font-weight: 700 !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

body:fullscreen #time-status,
body:-webkit-full-screen #time-status,
body:-moz-full-screen #time-status,
body:-ms-fullscreen #time-status,
body.fullscreen-mode #time-status {
    font-size: 2rem !important;
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    padding: 12px 30px !important;
    font-weight: 700 !important;
}

/* 全屏模式下的快捷键提示 - 隐藏 */
body:fullscreen .shortcut-hints,
body:-webkit-full-screen .shortcut-hints,
body:-moz-full-screen .shortcut-hints,
body:-ms-fullscreen .shortcut-hints,
body.fullscreen-mode .shortcut-hints,
.container:fullscreen .shortcut-hints,
.container:-webkit-full-screen .shortcut-hints,
.container:-moz-full-screen .shortcut-hints,
.container:-ms-fullscreen .shortcut-hints {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
}

/* 确保全屏模式下其他元素不会遮挡时间显示 */
body:fullscreen .controls,
body:-webkit-full-screen .controls,
body:-moz-full-screen .controls,
body:-ms-fullscreen .controls,
body.fullscreen-mode .controls,
.container:fullscreen .controls,
.container:-webkit-full-screen .controls,
.container:-moz-full-screen .controls,
.container:-ms-fullscreen .controls {
    flex-shrink: 0 !important;
    z-index: 1 !important;
    margin: 20px 0 !important;
    padding: 0 !important;
}

/* 全屏模式下的控制按钮 - 放大 */
body:fullscreen .control-btn,
body:-webkit-full-screen .control-btn,
body:-moz-full-screen .control-btn,
body:-ms-fullscreen .control-btn,
body.fullscreen-mode .control-btn,
.container:fullscreen .control-btn,
.container:-webkit-full-screen .control-btn,
.container:-moz-full-screen .control-btn,
.container:-ms-fullscreen .control-btn {
    padding: 18px 36px !important;
    font-size: 1.3rem !important;
    min-width: 120px !important;
}

body:fullscreen .control-btn .btn-icon,
body:-webkit-full-screen .control-btn .btn-icon,
body:-moz-full-screen .control-btn .btn-icon,
body:-ms-fullscreen .control-btn .btn-icon,
body.fullscreen-mode .control-btn .btn-icon {
    font-size: 1.5rem !important;
}

body:fullscreen .control-btn .btn-text,
body:-webkit-full-screen .control-btn .btn-text,
body:-moz-full-screen .control-btn .btn-text,
body:-ms-fullscreen .control-btn .btn-text,
body.fullscreen-mode .control-btn .btn-text {
    font-size: 1.3rem !important;
}

body:fullscreen .quick-switch,
body:-webkit-full-screen .quick-switch,
body:-moz-full-screen .quick-switch,
body:-ms-fullscreen .quick-switch,
body.fullscreen-mode .quick-switch,
.container:fullscreen .quick-switch,
.container:-webkit-full-screen .quick-switch,
.container:-moz-full-screen .quick-switch,
.container:-ms-fullscreen .quick-switch {
    flex-shrink: 0 !important;
    z-index: 1 !important;
    margin: 15px 0 !important;
    padding: 15px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    border-radius: 12px !important;
}

body:fullscreen .group-quick-switch,
body:-webkit-full-screen .group-quick-switch,
body:-moz-full-screen .group-quick-switch,
body:-ms-fullscreen .group-quick-switch,
body.fullscreen-mode .group-quick-switch,
.container:fullscreen .group-quick-switch,
.container:-webkit-full-screen .group-quick-switch,
.container:-moz-full-screen .group-quick-switch,
.container:-ms-fullscreen .group-quick-switch {
    flex-shrink: 0 !important;
    z-index: 1 !important;
    margin: 15px 0 !important;
    padding: 15px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    border-radius: 12px !important;
}

body:fullscreen .speaker-quick-switch,
body:-webkit-full-screen .speaker-quick-switch,
body:-moz-full-screen .speaker-quick-switch,
body:-ms-fullscreen .speaker-quick-switch,
body.fullscreen-mode .speaker-quick-switch,
.container:fullscreen .speaker-quick-switch,
.container:-webkit-full-screen .speaker-quick-switch,
.container:-moz-full-screen .speaker-quick-switch,
.container:-ms-fullscreen .speaker-quick-switch {
    flex-shrink: 0 !important;
    z-index: 1 !important;
    margin: 15px 0 !important;
    padding: 15px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    border-radius: 12px !important;
}

/* 全屏模式下的快速切换按钮 - 放大 */
body:fullscreen .quick-btn,
body:-webkit-full-screen .quick-btn,
body:-moz-full-screen .quick-btn,
body:-ms-fullscreen .quick-btn,
body.fullscreen-mode .quick-btn,
.container:fullscreen .quick-btn,
.container:-webkit-full-screen .quick-btn,
.container:-moz-full-screen .quick-btn,
.container:-ms-fullscreen .quick-btn {
    min-width: 80px !important;
    height: 80px !important;
    font-size: 1.4rem !important;
    font-weight: 700 !important;
    padding: 0 20px !important;
}

body:fullscreen .speaker-btn,
body:-webkit-full-screen .speaker-btn,
body:-moz-full-screen .speaker-btn,
body:-ms-fullscreen .speaker-btn,
body.fullscreen-mode .speaker-btn {
    min-width: 100px !important;
    height: 80px !important;
    font-size: 1.2rem !important;
}

body:fullscreen .group-btn,
body:-webkit-full-screen .group-btn,
body:-moz-full-screen .group-btn,
body:-ms-fullscreen .group-btn,
body.fullscreen-mode .group-btn {
    min-width: auto !important;
    height: 80px !important;
    padding: 0 30px !important;
    font-size: 1.1rem !important;
}

body:fullscreen .quick-switch-title,
body:-webkit-full-screen .quick-switch-title,
body:-moz-full-screen .quick-switch-title,
body:-ms-fullscreen .quick-switch-title,
body.fullscreen-mode .quick-switch-title {
    font-size: 1.3rem !important;
    font-weight: 700 !important;
    margin-bottom: 20px !important;
}

/* ========== 标题区域 ========== */
.header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 3px solid var(--color-primary);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 2px;
}

/* ========== 辩题选择区域（醒目显示） ========== */
.topic-selector {
    margin-bottom: 30px;
    display: flex;
    flex-direction: row;
    gap: 20px;
    align-items: stretch;
    justify-content: center;
    flex-wrap: wrap;
}

.topic-selector-main {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(33, 150, 243, 0.05) 100%);
    border-radius: 16px;
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-md);
}

.topic-label {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
}

.topic-select-large {
    width: 100%;
    padding: 18px 24px;
    font-size: 1.5rem;
    font-weight: 600;
    border: 3px solid var(--color-primary);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.topic-select-large:hover {
    border-color: #1976D2;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.topic-select-large:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.3);
    transform: translateY(-2px);
}

.topic-selector.match-started .topic-selector-main {
    background: rgba(33, 150, 243, 0.15);
    border-color: var(--color-primary);
}

/* ========== 模式选择器 ========== */
.mode-selector {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    padding: 30px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(33, 150, 243, 0.05) 100%);
    border-radius: 16px;
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.mode-label {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
    text-align: center;
}

.mode-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mode-option {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.mode-option:hover {
    border-color: var(--color-primary);
    background: rgba(33, 150, 243, 0.05);
    transform: translateX(5px);
}

.mode-option input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.mode-option span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    flex: 1;
}

.mode-option input[type="radio"]:checked + span {
    color: var(--color-primary);
    font-weight: 600;
}

.mode-option:has(input[type="radio"]:checked) {
    border-color: var(--color-primary);
    background: rgba(33, 150, 243, 0.1);
}


/* ========== 开始比赛按钮 ========== */
.start-match-container {
    text-align: center;
    margin: 40px 0;
}

.start-match-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1976D2 100%);
    color: var(--text-light);
    border: none;
    padding: 20px 60px;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 15px;
    min-width: 250px;
    justify-content: center;
}

.start-match-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.start-match-btn:active:not(:disabled) {
    transform: translateY(0);
}

.start-match-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon-large {
    font-size: 2rem;
}

.btn-text-large {
    font-size: 1.5rem;
}


/* ========== 当前阶段显示 ========== */
.current-stage {
    text-align: center;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-primary);
    border-radius: 10px;
}

.current-stage span {
    display: block;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.speaker-info {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========== 队伍时间显示（自由辩论模式） ========== */
.team-time-display {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.15) 0%, rgba(33, 150, 243, 0.08) 100%);
    border-radius: 16px;
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-md);
}

.team-time-label {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
}

.team-time-large {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
    letter-spacing: 4px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

/* ========== 队伍切换按钮 ========== */
.team-switch {
    margin: 20px 0;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 12px;
}

/* ========== 时间显示区域 ========== */
.timer-display {
    text-align: center;
    margin: 40px 0;
    padding: 40px;
    background: var(--bg-primary);
    border-radius: 20px;
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.timer-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(33, 150, 243, 0.05) 100%);
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

.timer-display.normal {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(33, 150, 243, 0.05) 100%);
    border: 3px solid var(--color-primary);
}

.timer-display.normal::before {
    opacity: 1;
}

.timer-display.warning {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.15) 0%, rgba(255, 152, 0, 0.08) 100%);
    border: 3px solid var(--color-warning);
    animation: pulse-warning 1s ease-in-out infinite;
}

.timer-display.danger {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.15) 0%, rgba(244, 67, 54, 0.08) 100%);
    border: 3px solid var(--color-danger);
    animation: pulse-danger 0.5s ease-in-out infinite;
}

@keyframes pulse-warning {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 152, 0, 0.4);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(255, 152, 0, 0);
    }
}

@keyframes pulse-danger {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(244, 67, 54, 0.6);
    }
    50% {
        box-shadow: 0 0 0 25px rgba(244, 67, 54, 0);
    }
}

.time {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.2);
    margin-bottom: 15px;
    font-variant-numeric: tabular-nums;
    letter-spacing: 4px;
    transition: all var(--transition-normal);
}

.timer-display.warning .time {
    color: var(--color-warning);
}

.timer-display.danger .time {
    color: var(--color-danger);
}

.time-label {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-secondary);
}

#time-status {
    padding: 8px 20px;
    background: var(--bg-secondary);
    border-radius: 20px;
    display: inline-block;
    box-shadow: var(--shadow-sm);
}

/* ========== 控制按钮区域 ========== */
.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.control-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.control-btn:active {
    transform: translateY(0);
}

.control-btn.large-btn {
    padding: 15px 30px;
    font-size: 1.1rem;
    background: var(--color-primary);
    color: var(--text-light);
    border-color: var(--color-primary);
}

.control-btn.large-btn:hover {
    background: #1976D2;
    border-color: #1976D2;
    color: var(--text-light);
}

.btn-icon {
    font-size: 1.2rem;
}

.btn-text {
    font-size: 1rem;
}

/* ========== 快速切换按钮区域 ========== */
.quick-switch,
.group-quick-switch,
.speaker-quick-switch {
    margin: 20px 0;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 12px;
}


.quick-switch-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
    text-align: center;
}

.quick-switch-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-btn {
    min-width: 60px;
    height: 60px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.quick-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.quick-btn.active {
    background: var(--color-primary);
    color: var(--text-light);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.1);
}

.quick-btn:active {
    transform: translateY(-1px) scale(1.05);
}

.speaker-btn {
    min-width: 80px;
    font-size: 1rem;
}

.group-btn {
    min-width: auto;
    padding: 0 20px;
    font-size: 0.95rem;
    white-space: nowrap;
}

/* ========== 快捷键提示 ========== */
.shortcut-hints {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
    padding: 15px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    flex-wrap: wrap;
}

.hint-item {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.hint-item kbd {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* ========== 设置按钮、统计按钮和计分板按钮 ========== */
.settings-btn-fixed,
.stats-btn-fixed,
.scoreboard-btn-fixed,
.fullscreen-btn-fixed {
    position: fixed;
    top: 20px;
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    z-index: 100;
}

.settings-btn-fixed {
    right: 20px;
}

.stats-btn-fixed {
    right: 80px;
}

.scoreboard-btn-fixed {
    right: 140px;
}

.fullscreen-btn-fixed {
    right: 200px;
}

.fullscreen-btn-fixed:hover {
    background: var(--color-success);
    color: var(--text-light);
    border-color: var(--color-success);
    transform: scale(1.1);
}

.fullscreen-btn-fixed.active {
    background: var(--color-success);
    color: var(--text-light);
    border-color: var(--color-success);
}

/* 全屏模式下隐藏辅助按钮（设置、统计、计分板） */
body:fullscreen .settings-btn-fixed,
body:-webkit-full-screen .settings-btn-fixed,
body:-moz-full-screen .settings-btn-fixed,
body:-ms-fullscreen .settings-btn-fixed,
body.fullscreen-mode .settings-btn-fixed {
    display: none !important;
}

body:fullscreen .stats-btn-fixed,
body:-webkit-full-screen .stats-btn-fixed,
body:-moz-full-screen .stats-btn-fixed,
body:-ms-fullscreen .stats-btn-fixed,
body.fullscreen-mode .stats-btn-fixed {
    display: none !important;
}

body:fullscreen .scoreboard-btn-fixed,
body:-webkit-full-screen .scoreboard-btn-fixed,
body:-moz-full-screen .scoreboard-btn-fixed,
body:-ms-fullscreen .scoreboard-btn-fixed,
body.fullscreen-mode .scoreboard-btn-fixed {
    display: none !important;
}

/* 全屏模式下全屏按钮保持在右上角 */
body:fullscreen .fullscreen-btn-fixed,
body:-webkit-full-screen .fullscreen-btn-fixed,
body:-moz-full-screen .fullscreen-btn-fixed,
body:-ms-fullscreen .fullscreen-btn-fixed,
body.fullscreen-mode .fullscreen-btn-fixed {
    display: flex !important;
    right: 20px !important;
    top: 20px !important;
    z-index: 1000 !important;
    width: 60px !important;
    height: 60px !important;
    font-size: 1.8rem !important;
    background: rgba(0, 0, 0, 0.5) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    backdrop-filter: blur(10px) !important;
}

body:fullscreen .fullscreen-btn-fixed:hover,
body:-webkit-full-screen .fullscreen-btn-fixed:hover,
body:-moz-full-screen .fullscreen-btn-fixed:hover,
body:-ms-fullscreen .fullscreen-btn-fixed:hover,
body.fullscreen-mode .fullscreen-btn-fixed:hover {
    background: rgba(0, 0, 0, 0.7) !important;
    border-color: rgba(255, 255, 255, 0.5) !important;
    transform: scale(1.1) !important;
}

.settings-btn-fixed:hover {
    background: var(--color-primary);
    color: var(--text-light);
    border-color: var(--color-primary);
    transform: rotate(90deg) scale(1.1);
}

.stats-btn-fixed:hover {
    background: var(--color-primary);
    color: var(--text-light);
    border-color: var(--color-primary);
    transform: scale(1.1);
}

.scoreboard-btn-fixed:hover {
    background: #FF9800;
    color: var(--text-light);
    border-color: #FF9800;
    transform: scale(1.1);
}

.fullscreen-btn-fixed:hover {
    background: var(--color-success);
    color: var(--text-light);
    border-color: var(--color-success);
    transform: scale(1.1);
}

.fullscreen-btn-fixed.active {
    background: var(--color-success);
    color: var(--text-light);
    border-color: var(--color-success);
}

/* ========== 进度条 ========== */
.progress-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 50;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, #1976D2 100%);
    width: 100%;
    transition: width 0.1s linear, background-color var(--transition-normal);
    box-shadow: 0 0 10px rgba(33, 150, 243, 0.5);
}

.progress-bar.warning {
    background: linear-gradient(90deg, var(--color-warning) 0%, #F57C00 100%);
    box-shadow: 0 0 10px rgba(255, 152, 0, 0.5);
}

.progress-bar.danger {
    background: linear-gradient(90deg, var(--color-danger) 0%, #D32F2F 100%);
    box-shadow: 0 0 10px rgba(244, 67, 54, 0.5);
}

/* ========== 设置面板、统计面板和计分板 ========== */
.settings-panel,
.stats-panel,
.scoreboard-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(5px);
}

.settings-panel.show,
.stats-panel.show,
.scoreboard-panel.show {
    opacity: 1;
    visibility: visible;
}

.settings-content,
.stats-content-wrapper,
.scoreboard-content-wrapper {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.settings-panel.show .settings-content,
.stats-panel.show .stats-content-wrapper,
.scoreboard-panel.show .scoreboard-content-wrapper {
    transform: scale(1);
}

.stats-content-wrapper,
.scoreboard-content-wrapper {
    max-width: 800px;
}

.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.stats-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.export-stats-btn {
    padding: 8px 16px;
    background: var(--color-primary);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.export-stats-btn:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stats-content {
    max-height: 60vh;
    overflow-y: auto;
    margin-bottom: 20px;
}

.stats-section {
    margin-bottom: 30px;
}

.stats-section h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.stats-section h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 15px 0 10px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-item {
    padding: 12px;
    background: var(--bg-primary);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 1.2rem;
    color: var(--color-primary);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.stats-group {
    margin-bottom: 25px;
    padding: 15px;
    background: var(--bg-primary);
    border-radius: 12px;
}

.stats-table {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stats-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 10px;
    padding: 10px;
    border-radius: 6px;
    align-items: center;
}

.stats-row.stats-header {
    background: var(--color-primary);
    color: var(--text-light);
    font-weight: 600;
    font-size: 0.95rem;
}

.stats-row:not(.stats-header) {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.stats-row:not(.stats-header):hover {
    background: rgba(33, 150, 243, 0.05);
}

.close-stats {
    width: 100%;
    padding: 12px;
    margin-top: 20px;
    background: var(--color-primary);
    color: var(--text-light);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.close-stats:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.settings-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 25px;
    text-align: center;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-of-type {
    border-bottom: none;
}

.setting-item label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.setting-item input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.setting-item input[type="number"] {
    padding: 8px 12px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    width: 120px;
    text-align: center;
    transition: all var(--transition-normal);
}

.setting-item input[type="number"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.2);
}

.close-settings {
    width: 100%;
    padding: 12px;
    margin-top: 20px;
    background: var(--color-primary);
    color: var(--text-light);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.close-settings:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.close-settings:active {
    transform: translateY(0);
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 20px;
        border-radius: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .time {
        font-size: 4rem;
        letter-spacing: 2px;
    }
    
    .team-time-large {
        font-size: 2.5rem;
        letter-spacing: 2px;
    }
    
    .team-time-label {
        font-size: 1.1rem;
    }
    
    .topic-selector {
        flex-direction: column;
        gap: 15px;
    }
    
    .topic-selector-main {
        width: 100%;
        max-width: 100%;
        padding: 20px;
    }
    
    .mode-selector {
        width: 100%;
        max-width: 100%;
        padding: 20px;
    }
    
    .topic-label {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }
    
    .topic-select-large {
        font-size: 1.2rem;
        padding: 15px 20px;
    }
    
    .start-match-btn {
        padding: 15px 40px;
        font-size: 1.2rem;
        min-width: 200px;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-btn {
        width: 100%;
        justify-content: center;
    }
    
    .quick-switch-buttons {
        gap: 8px;
    }
    
    .quick-btn {
        min-width: 50px;
        height: 50px;
        font-size: 1rem;
    }
    
    .speaker-btn {
        min-width: 70px;
    }
    
    .team-btn {
        min-width: auto;
        padding: 0 15px;
        font-size: 0.9rem;
    }
    
    .shortcut-hints {
        flex-direction: column;
        gap: 10px;
    }
    
    .settings-btn-fixed,
    .stats-btn-fixed,
    .scoreboard-btn-fixed {
        top: 10px;
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .settings-btn-fixed {
        right: 10px;
    }
    
    .stats-btn-fixed {
        right: 65px;
    }
    
    .scoreboard-btn-fixed {
        right: 120px;
    }
    
    .fullscreen-btn-fixed {
        right: 175px;
    }
    
    .scoreboard-grid {
        grid-template-columns: 1fr;
    }
    
    .score-value {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .time {
        font-size: 3rem;
    }
    
    .team-time-large {
        font-size: 2rem;
        letter-spacing: 1px;
    }
    
    .team-time-label {
        font-size: 1rem;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .current-stage span {
        font-size: 1.1rem;
    }
    
}

/* ========== 打印样式 ========== */
@media print {
    body {
        background: white;
    }
    
    .container {
        box-shadow: none;
        padding: 20px;
    }
    
    .settings-btn-fixed,
    .fullscreen-btn-fixed,
    .controls,
    .quick-switch,
    .group-quick-switch,
    .speaker-quick-switch,
    .shortcut-hints {
        display: none !important;
    }
}

/* ========== 全屏模式优化 ========== */
@media (max-width: 768px) {
    .fullscreen-btn-fixed {
        right: 140px;
    }
}

@media (max-width: 480px) {
    .fullscreen-btn-fixed {
        right: 100px;
    }
}

/* ========== 无障碍支持 ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 焦点可见性 ========== */
button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* ========== 滚动条样式 ========== */
.settings-content::-webkit-scrollbar {
    width: 8px;
}

.settings-content::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

.settings-content::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

.settings-content::-webkit-scrollbar-thumb:hover {
    background: #1976D2;
}

/* ========== 计分板样式（美化版） ========== */
.scoreboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 3px solid #FF9800;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1) 0%, rgba(255, 152, 0, 0.05) 100%);
    padding: 20px;
    margin: -30px -30px 25px -30px;
    border-radius: 20px 20px 0 0;
}

.scoreboard-header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.view-toggle-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1976D2 100%);
    color: var(--text-light);
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
    position: relative;
    overflow: hidden;
}

.view-toggle-btn:hover {
    background: linear-gradient(135deg, #1976D2 0%, #1565C0 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(33, 150, 243, 0.4);
}

.export-scoreboard-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-success) 0%, #388E3C 100%);
    color: var(--text-light);
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
    position: relative;
    overflow: hidden;
}

.export-scoreboard-btn:hover {
    background: linear-gradient(135deg, #388E3C 0%, #2E7D32 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

.export-scoreboard-btn:active {
    transform: translateY(0);
}

.view-toggle-btn:active {
    transform: translateY(0);
}

.scoreboard-header h3 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
}

.reset-scores-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-danger) 0%, #D32F2F 100%);
    color: var(--text-light);
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
    position: relative;
    overflow: hidden;
}

.reset-scores-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.reset-scores-btn:hover::before {
    width: 300px;
    height: 300px;
}

.reset-scores-btn:hover {
    background: linear-gradient(135deg, #D32F2F 0%, #B71C1C 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(244, 67, 54, 0.4);
}

.reset-scores-btn:active {
    transform: translateY(0);
}

.scoreboard-content {
    max-height: 60vh;
    overflow-y: auto;
    margin-bottom: 20px;
    padding: 10px;
}

.scoreboard-content::-webkit-scrollbar {
    width: 8px;
}

.scoreboard-content::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

.scoreboard-content::-webkit-scrollbar-thumb {
    background: #FF9800;
    border-radius: 4px;
}

.scoreboard-content::-webkit-scrollbar-thumb:hover {
    background: #F57C00;
}

.scoreboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    padding: 10px;
}

.scoreboard-item {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.08) 0%, rgba(255, 152, 0, 0.03) 100%);
    border: 2px solid rgba(255, 152, 0, 0.3);
    border-radius: 20px;
    padding: 25px;
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.scoreboard-item.scoreboard-top {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 152, 0, 0.1) 100%);
    border: 3px solid rgba(255, 215, 0, 0.5);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
}

.scoreboard-item.scoreboard-top::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 215, 0, 0.1), transparent);
    animation: rotate 3s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.scoreboard-rank {
    position: absolute;
    top: 15px;
    left: 15px;
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(255, 152, 0, 0.4);
    z-index: 1;
    pointer-events: none;
}

.scoreboard-item.scoreboard-top .scoreboard-rank {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.5);
    animation: pulse-gold 2s ease-in-out infinite;
}

@keyframes pulse-gold {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(255, 215, 0, 0.5);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 4px 12px rgba(255, 215, 0, 0.7);
    }
}

.scoreboard-crown {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 2rem;
    animation: bounce 1s ease-in-out infinite;
    z-index: 1;
    pointer-events: none;
    filter: drop-shadow(0 2px 4px rgba(255, 215, 0, 0.5));
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0) rotate(-5deg);
    }
    50% {
        transform: translateY(-5px) rotate(5deg);
    }
}

.scoreboard-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
    pointer-events: none;
    z-index: 0;
}

.scoreboard-item:hover::before {
    left: 100%;
}

.scoreboard-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.25);
    border-color: #FF9800;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.15) 0%, rgba(255, 152, 0, 0.08) 100%);
}

.scoreboard-group-name {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 12px;
    background-color: rgba(255, 152, 0, 0.1);
    border: 2px solid rgba(255, 152, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.scoreboard-group-name::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, #FF9800, transparent);
    animation: shimmer 2s infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0%, 100% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
}

.scoreboard-score-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin: 25px 0;
    position: relative;
    z-index: 10;
    padding: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    border-radius: 16px;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.05);
}

.score-value-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    min-width: 120px;
}

.score-label {
    font-size: 1rem;
    font-weight: 600;
    color: rgba(255, 152, 0, 0.6);
    letter-spacing: 2px;
}

.score-btn {
    width: 60px;
    height: 60px;
    border: 3px solid;
    border-radius: 50%;
    background: var(--bg-secondary);
    font-size: 2.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
    z-index: 10;
}

.score-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.score-btn:active::before {
    width: 200px;
    height: 200px;
}

.score-btn:hover {
    transform: scale(1.15) rotate(5deg);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.score-btn:active {
    transform: scale(1.05) rotate(0deg);
}

.score-btn.score-increase {
    border-color: var(--color-success);
    color: var(--color-success);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, rgba(76, 175, 80, 0.05) 100%);
}

.score-btn.score-increase:hover {
    background: linear-gradient(135deg, var(--color-success) 0%, #388E3C 100%);
    color: var(--text-light);
    border-color: var(--color-success);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.score-btn.score-decrease {
    border-color: var(--color-danger);
    color: var(--color-danger);
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.1) 0%, rgba(244, 67, 54, 0.05) 100%);
}

.score-btn.score-decrease:hover {
    background: linear-gradient(135deg, var(--color-danger) 0%, #D32F2F 100%);
    color: var(--text-light);
    border-color: var(--color-danger);
    box-shadow: 0 6px 20px rgba(244, 67, 54, 0.4);
}

.score-value {
    font-size: 4.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 120px;
    font-variant-numeric: tabular-nums;
    text-shadow: 0 0 30px rgba(255, 152, 0, 0.3);
    transition: all var(--transition-normal);
    position: relative;
    padding: 10px 20px;
    border-radius: 12px;
    background-color: rgba(255, 152, 0, 0.05);
}

.score-value.score-updated {
    animation: scorePulse 0.4s ease;
    transform: scale(1.2);
    background-color: rgba(33, 150, 243, 0.1);
}

.score-value.score-updated::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(33, 150, 243, 0.5);
    animation: glow 0.4s ease;
}

@keyframes scorePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3);
    }
}

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

.scoreboard-controls {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid rgba(255, 152, 0, 0.2);
    position: relative;
    z-index: 10;
}

.score-btn-small {
    padding: 10px 24px;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1) 0%, rgba(255, 152, 0, 0.05) 100%);
    border: 2px solid #FF9800;
    border-radius: 12px;
    color: #FF9800;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(255, 152, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.score-btn-small::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 152, 0, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.score-btn-small:hover::before {
    width: 200px;
    height: 200px;
}

.score-btn-small:hover {
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.4);
    border-color: #F57C00;
}

.score-btn-small:active {
    transform: translateY(0);
}

.close-scoreboard {
    width: 100%;
    padding: 14px;
    margin-top: 20px;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    color: var(--text-light);
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.close-scoreboard::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.close-scoreboard:hover::before {
    width: 300px;
    height: 300px;
}

.close-scoreboard:hover {
    background: linear-gradient(135deg, #F57C00 0%, #E65100 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 152, 0, 0.4);
}

.close-scoreboard:active {
    transform: translateY(0);
}

/* ========== 全局计分板视图样式 ========== */
.global-scoreboard {
    display: flex;
    flex-direction: column;
    gap: 25px;
    padding: 10px;
}

.global-topic-section {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.08) 0%, rgba(255, 152, 0, 0.03) 100%);
    border: 2px solid rgba(255, 152, 0, 0.3);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.15);
    transition: all var(--transition-normal);
}

.global-topic-section:hover {
    border-color: rgba(255, 152, 0, 0.5);
    box-shadow: 0 6px 20px rgba(255, 152, 0, 0.25);
    transform: translateY(-2px);
}

.global-topic-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(255, 152, 0, 0.2);
}

.global-topic-header h4 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.global-topic-total {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-warning);
    padding: 6px 12px;
    background: rgba(255, 152, 0, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(255, 152, 0, 0.3);
}

.global-topic-scores {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.global-score-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: all var(--transition-normal);
}

.global-score-item:hover {
    background: rgba(255, 152, 0, 0.05);
    border-color: rgba(255, 152, 0, 0.3);
    transform: translateX(5px);
}

.global-score-item.global-score-top {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 152, 0, 0.1) 100%);
    border: 2px solid rgba(255, 215, 0, 0.5);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.2);
}

.global-rank {
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    color: var(--text-light);
    border-radius: 50%;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(255, 152, 0, 0.3);
}

.global-score-item.global-score-top .global-rank {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.4);
}

.global-group-name {
    flex: 1;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.global-score-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-warning);
    min-width: 60px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.global-score-item.global-score-top .global-score-value {
    color: #FFD700;
    font-size: 1.6rem;
}

/* 计分板响应式优化 */
@media (max-width: 768px) {
    .scoreboard-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scoreboard-item {
        padding: 20px;
    }
    
    .score-value {
        font-size: 3.5rem;
        min-width: 100px;
    }
    
    .score-btn {
        width: 55px;
        height: 55px;
        font-size: 2rem;
    }
    
    .scoreboard-group-name {
        font-size: 1.1rem;
        padding: 12px;
    }
    
    .scoreboard-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .scoreboard-header-actions {
        width: 100%;
        justify-content: space-between;
    }

    .scoreboard-header h3 {
        font-size: 1.6rem;
    }

    .global-topic-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .global-score-item {
        padding: 10px 12px;
    }

    .global-group-name {
        font-size: 1rem;
    }

    .global-score-value {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .score-value {
        font-size: 3rem;
    }
    
    .score-btn {
        width: 50px;
        height: 50px;
        font-size: 1.8rem;
    }
    
    .scoreboard-score-display {
        gap: 15px;
        padding: 15px;
    }

    .view-toggle-btn,
    .reset-scores-btn,
    .export-scoreboard-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .global-topic-section {
        padding: 15px;
    }

    .global-rank {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }
}