/* 全局样式重置与优化 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 深蓝紫色系 */
    --primary-color: #5E35B1;
    --primary-dark: #4527A0;
    --primary-light: #7E57C2;
    --secondary-color: #26A69A;
    --accent-color: #FF7043;
    --success-color: #43A047;
    --warning-color: #FFA726;
    --wrong-color: #F44336;

    /* 背景和文字色 */
    --bg-dark: #121212;
    --bg-card: #1E1E2E;
    --bg-card-light: #2A2A3A;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0C0;
    --text-muted: #888899;
    --border-color: rgba(255, 255, 255, 0.1);

    /* 效果变量 */
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Tahoma, Geneva, Verdana, sans-serif;
    background:
        linear-gradient(135deg, rgba(30, 30, 60, 0.9) 0%, rgba(10, 10, 30, 0.95) 100%),
        url('../images/bg-3.png') no-repeat center center fixed;
    background-size: cover;
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* 主布局 */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边导航 */
.sidebar {
    width: 280px;
    background: var(--bg-card);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 30px 25px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.sidebar-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.sidebar-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.nav-menu {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 18px 25px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    border-left: 4px solid transparent;
    cursor: pointer;
}

.nav-item:hover {
    background: var(--bg-card-light);
    color: var(--text-primary);
    border-left-color: var(--primary-color);
}

.nav-item.active {
    background: var(--bg-card-light);
    color: var(--text-primary);
    border-left-color: var(--accent-color);
}

.nav-item i {
    margin-right: 15px;
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.nav-item span {
    font-weight: 500;
}

.sidebar-footer {
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 30px;
    transition: var(--transition);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 5px;
}

.back-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(94, 53, 177, 0.3);
}

.back-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(94, 53, 177, 0.4);
}

/* 主菜单样式 */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 20px;
}

.dashboard-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.dashboard-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.card-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.card-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 考试信息样式 */
.exam-info {
    margin: 30px auto;
    max-width: 400px;
    text-align: left;
}

.info-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item i {
    width: 24px;
    margin-right: 15px;
    color: var(--primary-color);
}

/* 添加题源样式 */
.question-source {
    background: linear-gradient(135deg, var(--secondary-color), #26C6DA);
    color: white;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(38, 166, 154, 0.3);
}

.question-source i {
    font-size: 1rem;
}

/* 练习选项样式 */
.mode-selector {
    display: flex;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 10px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.mode-option {
    flex: 1;
    text-align: center;
    padding: 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.mode-option.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(94, 53, 177, 0.3);
}

/* 分类样式 */
.categories-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.category-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-header {
    padding: 25px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    position: relative;
}

.category-title {
    font-size: 1.3rem;
    font-weight: 600;
}

.category-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* 入职培训控制按钮 */
.training-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

/* 快速跳题容器 */
.quickjump-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.quickjump-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow);
    text-align: center;
    border: 1px solid var(--border-color);
}

/* 错题辑录控制区域 */
.wrong-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.wrong-stats {
    display: flex;
    gap: 30px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* 删除分类按钮 */
.delete-category-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.delete-category-btn:hover {
    background: var(--wrong-color);
    transform: scale(1.1);
}

/* 系统公告按钮样式 */
.update-notice-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--accent-color), #FF5722);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 15px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(255, 112, 67, 0.3);
}

.update-notice-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 112, 67, 0.4);
}

.update-notice-btn i {
    font-size: 1.1rem;
}

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.modal-header h3 {
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 系统公告标签页 */
.system-notice-tabs {
    display: flex;
    background: var(--bg-card-light);
    border-bottom: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    text-align: center;
    padding: 18px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-secondary);
}

.tab.active {
    color: var(--text-primary);
    border-bottom: 3px solid var(--accent-color);
    background: var(--bg-card);
}

.update-container {
    display: flex;
    height: 500px;
    flex-direction: column;
}

.tips-content {
    padding: 30px;
    overflow-y: auto;
    height: 100%;
}

.updates-content {
    display: flex;
    height: 100%;
}

.tips-content h4,
.update-content h4 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.content-text {
    line-height: 1.7;
    color: var(--text-secondary);
}

.content-text h5 {
    color: var(--text-primary);
    margin: 20px 0 10px;
    font-size: 1.1rem;
}

.content-text ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.content-text li {
    margin-bottom: 8px;
}

/* 版本列表 */
.version-list {
    width: 200px;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    background: var(--bg-card-light);
}

.version-item {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.version-item:hover {
    background: var(--bg-card-light);
}

.version-item.active {
    background: var(--primary-color);
    color: white;
}

.version-number {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.version-date {
    font-size: 0.85rem;
    opacity: 0.8;
}

.update-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

/* 问题网格样式 */
.questions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 12px;
    padding: 25px;
}

.training-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
}

.delete-question-btn {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    background: var(--wrong-color);
    color: white;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.question-item {
    position: relative;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
}

.question-item:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.question-item:hover .delete-question-btn {
    display: flex;
}

.delete-question-btn:hover {
    background: #d32f2f;
    transform: scale(1.1);
}

/* 颜色图例 */
.color-legend {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
    padding: 15px 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.legend-title {
    font-weight: 600;
    color: var(--text-primary);
}

.legend-items {
    display: flex;
    gap: 15px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 答题页面样式 */
.question-container {
    max-width: 900px;
    margin: 0 auto;
}

.question-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.question-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.meta-tag {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card-light);
    color: var(--text-primary);
}

.question-text {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.options-container {
    margin-bottom: 30px;
}

.option {
    display: flex;
    align-items: flex-start;
    padding: 18px 20px;
    margin-bottom: 15px;
    background: var(--bg-card-light);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.option:hover {
    background: rgba(94, 53, 177, 0.1);
    border-color: var(--primary-color);
}

.option.selected {
    background: rgba(94, 53, 177, 0.2);
    border-color: var(--primary-color);
}

.option.correct {
    background: rgba(67, 160, 71, 0.2);
    border-color: var(--success-color);
}

.option.wrong {
    background: rgba(244, 67, 54, 0.2);
    border-color: var(--wrong-color);
}

.option-label {
    font-weight: 700;
    margin-right: 15px;
    min-width: 24px;
    color: var(--primary-color);
}

.option-text {
    flex: 1;
    line-height: 1.6;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.nav-btn {
    padding: 14px 28px;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
}

.nav-btn.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(94, 53, 177, 0.3);
}

.nav-btn.primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(94, 53, 177, 0.4);
}

.nav-btn.secondary {
    background: var(--bg-card-light);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.nav-btn.secondary:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.answer-analysis {
    border-left: 5px solid var(--accent-color);
}

/* 移动端适配 */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 101;
    background: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

/* 题目统计样式 */
.question-stats {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.question-stats h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.stats-grid .stat-item {
    text-align: center;
    padding: 15px;
    background: var(--bg-card-light);
    border-radius: var(--border-radius);
}

.stats-grid .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stats-grid .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 考试统计样式 */
.exam-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
}

.exam-stats .stat-item {
    text-align: center;
}

.exam-stats .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.exam-stats .stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* 认证相关样式 */
.auth-input {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-card-light);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.auth-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(94, 53, 177, 0.2);
}

.auth-btn {
    width: 100%;
    margin: 15px 0;
    justify-content: center;
}

.auth-switch {
    text-align: center;
    cursor: pointer;
    color: var(--primary-color);
    font-weight: 500;
    margin-top: 15px;
    transition: var(--transition);
}

.auth-switch:hover {
    color: var(--primary-light);
}

/* 快速跳题相关样式 */
.jump-input {
    width: 100%;
    padding: 12px 16px;
    margin: 20px 0;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-card-light);
    color: var(--text-primary);
    font-size: 1rem;
    text-align: center;
    transition: var(--transition);
}

.jump-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(94, 53, 177, 0.2);
}

.quickjump-btn {
    width: 100%;
    justify-content: center;
}

/* 考试相关样式 */
.exam-card {
    text-align: center;
    padding: 60px 40px;
}

.exam-start-btn {
    margin-top: 30px;
    justify-content: center;
}

/* 题目统计样式 */
.question-stats {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.question-stats h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.2rem;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.stats-grid .stat-item {
    text-align: center;
    padding: 15px;
    background: var(--bg-card-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.stats-grid .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stats-grid .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 考试统计样式 */
.exam-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
    padding: 20px;
    background: var(--bg-card-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.exam-stats .stat-item {
    text-align: center;
}

.exam-stats .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.exam-stats .stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}


@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .quickjump-container {
        grid-template-columns: 1fr;
    }

    .categories-container {
        grid-template-columns: 1fr;
    }

    .update-container {
        flex-direction: column;
        height: auto;
        max-height: 70vh;
    }

    .updates-content {
        flex-direction: column;
    }

    .version-list {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 150px;
    }

    .version-list {
        display: flex;
        overflow-x: auto;
    }

    .version-item {
        min-width: 120px;
        border-bottom: none;
        border-right: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 15px 10px;
    }

    .exam-stats {
        flex-direction: column;
        gap: 15px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .quickjump-btn,
    .exam-start-btn,
    .auth-btn {
        padding: 12px 20px;
    }

    .delete-question-btn {
        display: flex;
        top: -4px;
        right: -4px;
        width: 18px;
        height: 18px;
        font-size: 0.6rem;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .card-title {
        font-size: 1.3rem;
    }

    .card-description {
        font-size: 0.9rem;
    }

    .question-text {
        font-size: 1.1rem;
    }

    .option-text {
        font-size: 0.95rem;
    }

    .nav-btn {
        font-size: 0.9rem;
        padding: 12px 20px;
    }

    .category-title {
        font-size: 1.1rem;
    }

    .meta-tag {
        font-size: 0.85rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .back-btn {
        align-self: stretch;
        justify-content: center;
    }

    .wrong-controls {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .wrong-stats {
        justify-content: center;
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .question-meta {
        flex-direction: column;
        gap: 10px;
    }

    .modal-content {
        margin: 10px;
    }

    .modal-header {
        padding: 20px;
    }

    .tips-content,
    .updates-content {
        padding: 20px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dashboard-card,
.category-card,
.question-card {
    animation: fadeIn 0.5s ease-out;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-card-light);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}