/* 电竞比赛预测系统 - 全局样式 */

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background-color: #f3f4f6;
    --card-background: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* 导航栏 */
.navbar {
    background-color: var(--card-background);
    box-shadow: var(--shadow);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand:hover {
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    gap: 20px;
    list-style: none;
}

.navbar-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
    text-decoration: none;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.user-score {
    background-color: var(--success-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #5b6370;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background-color: var(--background-color);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1rem;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 卡片 */
.card {
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

/* 比赛卡片 */
.match-card {
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.match-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.match-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.match-tournament {
    display: flex;
    align-items: center;
    gap: 8px;
}

.match-format {
    background-color: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.match-time {
    display: flex;
    align-items: center;
    gap: 4px;
}

.match-teams {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.team {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.team-logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
    border-radius: 8px;
    background-color: var(--background-color);
    padding: 8px;
}

.team-name {
    font-weight: 600;
    text-align: center;
}

.team-country {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.match-vs {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-secondary);
}

.match-score {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 2rem;
    font-weight: bold;
}

.match-score .score {
    min-width: 40px;
    text-align: center;
}

.match-score .winner {
    color: var(--success-color);
}

.match-footer {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.prediction-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 预测表单 */
.prediction-form {
    background-color: var(--background-color);
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
}

.prediction-form h4 {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.score-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.score-option {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.score-option:hover {
    border-color: var(--primary-color);
}

.score-option.selected {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

.score-option.team1 {
    border-color: #3b82f6;
}

.score-option.team1.selected {
    background-color: #3b82f6;
}

.score-option.team2 {
    border-color: #ef4444;
}

.score-option.team2.selected {
    background-color: #ef4444;
}

/* 用户预测显示 */
.user-prediction {
    background-color: rgba(79, 70, 229, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    padding: 12px;
    margin-top: 16px;
}

.user-prediction h4 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.prediction-result {
    display: flex;
    align-items: center;
    gap: 8px;
}

.prediction-result.correct {
    color: var(--success-color);
}

.prediction-result.wrong {
    color: var(--danger-color);
}

/* 表单 */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-control::placeholder {
    color: #9ca3af;
}

select.form-control {
    cursor: pointer;
}

/* 表格 */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--background-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
}

tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* 排行榜 */
.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

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

.leaderboard-rank {
    width: 40px;
    font-weight: bold;
    color: var(--text-secondary);
}

.leaderboard-rank.top-1 {
    color: #fbbf24;
    font-size: 1.2rem;
}

.leaderboard-rank.top-2 {
    color: #9ca3af;
    font-size: 1.1rem;
}

.leaderboard-rank.top-3 {
    color: #cd7f32;
    font-size: 1.1rem;
}

.leaderboard-user {
    flex: 1;
    font-weight: 500;
}

.leaderboard-stats {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.leaderboard-score {
    font-weight: bold;
    color: var(--primary-color);
}

/* 标签页 */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--primary-color);
}

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* 徽章 */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.badge-info {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* 加载状态 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 提示消息 */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.alert-info {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--card-background);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.1rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .navbar-nav {
        display: none;
    }
    
    .match-teams {
        flex-direction: column;
        gap: 10px;
    }
    
    .team {
        flex-direction: row;
    }
    
    .team-logo {
        width: 48px;
        height: 48px;
    }
}

/* 统计卡片 */
.stat-card {
    background-color: var(--card-background);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.stat-card h4 {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

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

.stat-card .change {
    font-size: 0.85rem;
    margin-top: 4px;
}

.stat-card .change.positive {
    color: var(--success-color);
}

.stat-card .change.negative {
    color: var(--danger-color);
}

/* 页面标题 */
.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
}

/* 筛选器 */
.filters {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--card-background);
    cursor: pointer;
}

/* 登录/注册页面 */
.auth-container {
    min-height: calc(100vh - 60px);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.auth-card {
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: 40px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 8px;
}

.auth-card .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.auth-card .form-group {
    margin-bottom: 20px;
}

.auth-card .btn {
    width: 100%;
    padding: 12px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

/* 管理员侧边栏 */
.admin-layout {
    display: flex;
    min-height: calc(100vh - 60px);
}

.admin-sidebar {
    width: 250px;
    background-color: var(--card-background);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
}

.admin-sidebar-nav {
    list-style: none;
}

.admin-sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.admin-sidebar-nav a:hover,
.admin-sidebar-nav a.active {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    text-decoration: none;
}

.admin-content {
    flex: 1;
    padding: 20px;
    overflow-x: auto;
}

@media (max-width: 768px) {
    .admin-sidebar {
        display: none;
    }
}

/* Toast 通知 */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }

/* ==================== 新增样式 ==================== */

/* 移动端汉堡菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

/* 游戏切换器 */
.nav-game-switcher {
    display: flex;
    gap: 4px;
    margin-right: 10px;
}

.game-btn {
    padding: 6px 12px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}

.game-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.game-btn.active {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

/* 移动端游戏切换器 */
.mobile-game-switcher {
    display: none;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
    padding: 10px;
    background: var(--card-background);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* 管理后台侧边栏头部 */
.admin-sidebar-header {
    display: none;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

/* 侧边栏遮罩 */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* 比赛时间显示 */
.match-time-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 0.85rem;
}

.match-time-countdown {
    color: var(--primary-color);
    font-weight: 500;
}

.match-time-exact {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* 按钮组垂直排列 */
.btn-group-vertical {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.btn-group-vertical .btn {
    width: 100%;
}

/* 桌面端隐藏移动端用户菜单 */
.mobile-user-menu {
    display: none;
}

/* ==================== 移动端响应式 ==================== */

@media (max-width: 768px) {
    /* 显示汉堡菜单 */
    .mobile-menu-toggle {
        display: flex;
    }

    /* 导航栏调整 */
    .navbar-container {
        padding: 0 10px;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    /* 导航菜单变为下拉 */
    .navbar-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--card-background);
        flex-direction: column;
        padding: 10px 0;
        box-shadow: var(--shadow-lg);
        display: none;
        z-index: 999;
    }

    .navbar-nav.active {
        display: flex;
    }

    .navbar-nav li {
        width: 100%;
    }

    .navbar-nav a {
        display: block;
        padding: 12px 20px;
        border-radius: 0;
    }

    .nav-game-switcher {
        padding: 10px 20px;
        margin-right: 0;
        border-bottom: 1px solid var(--border-color);
    }

    /* 显示移动端游戏切换器 */
    .mobile-game-switcher {
        display: flex;
    }

    /* 用户区域 - 移动端隐藏，移入下拉菜单 */
    .navbar-user {
        display: none;
    }

    /* 移动端用户菜单项 */
    .mobile-user-menu {
        display: block;
        padding: 10px 20px;
        border-top: 1px solid var(--border-color);
    }

    .mobile-user-menu .btn {
        width: 100%;
        margin-bottom: 8px;
    }

    .mobile-user-menu .btn:last-child {
        margin-bottom: 0;
    }

    .mobile-user-info {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 0;
        margin-bottom: 10px;
        border-bottom: 1px solid var(--border-color);
    }

    .mobile-user-info .user-score {
        background-color: var(--success-color);
        color: white;
        padding: 2px 8px;
        border-radius: 12px;
        font-size: 0.85rem;
        font-weight: 600;
    }

    /* 容器 */
    .container {
        padding: 15px;
    }

    /* 页面标题 */
    .page-header {
        margin-bottom: 18px;
    }

    .page-header h1 {
        font-size: 1.35rem;
    }

    /* 比赛卡片 - 适度减少间距 */
    .match-card {
        padding: 14px;
        margin-bottom: 14px;
    }

    .match-header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
        margin-bottom: 12px;
    }

    .match-teams {
        flex-direction: column;
        gap: 12px;
    }

    .team {
        flex-direction: row;
        width: 100%;
        justify-content: flex-start;
        gap: 10px;
    }

    .team-logo {
        width: 44px;
        height: 44px;
        padding: 6px;
    }

    .team-name {
        text-align: left;
    }

    .match-vs {
        font-size: 1rem;
        align-self: center;
    }

    .match-footer {
        margin-top: 12px;
        padding-top: 12px;
    }

    /* 预测表单 - 适度优化 */
    .prediction-form {
        padding: 12px;
        margin-top: 12px;
    }

    .score-selector {
        justify-content: center;
        gap: 6px;
        margin-bottom: 10px;
    }

    .score-option {
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    /* 用户预测显示 */
    .user-prediction {
        padding: 10px;
        margin-top: 12px;
    }

    /* 筛选器 */
    .filters {
        flex-direction: column;
    }

    .filter-select {
        width: 100%;
    }

    /* 统计卡片 */
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-card {
        padding: 15px;
    }

    .stat-card .value {
        font-size: 1.5rem;
    }

    /* 表格响应式 */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 600px;
    }

    th, td {
        padding: 10px 12px;
        font-size: 0.85rem;
    }

    /* 排行榜 */
    .leaderboard-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .leaderboard-stats {
        width: 100%;
        justify-content: space-between;
        font-size: 0.8rem;
    }

    /* 管理后台侧边栏 */
    .admin-sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        overflow-y: auto;
    }

    .admin-sidebar.active {
        left: 0;
    }

    .admin-sidebar-header {
        display: flex;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .admin-content {
        padding: 15px;
    }

    /* 模态框 */
    .modal {
        width: 95%;
        max-height: 85vh;
        margin: 10px;
    }

    .modal-body {
        padding: 15px;
    }

    /* 按钮组 */
    .btn-group-vertical {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .btn-group-vertical .btn {
        width: auto;
        flex: 1;
        min-width: 60px;
    }

    /* 认证页面 */
    .auth-card {
        padding: 25px;
    }

    /* Toast */
    .toast-container {
        left: 10px;
        right: 10px;
    }

    .toast {
        min-width: auto;
        width: 100%;
    }
}

/* 小屏幕手机 */
@media (max-width: 480px) {
    .navbar-brand {
        font-size: 1rem;
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

    .score-option {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .btn-group-vertical {
        flex-direction: column;
    }

    .btn-group-vertical .btn {
        width: 100%;
    }
}

/* ==================== 排行榜预览样式 ==================== */

.leaderboard-preview {
    margin-bottom: 20px;
}

.leaderboard-preview .card-header {
    cursor: default;
}

.leaderboard-preview .card-header h2 {
    font-size: 1rem;
    margin: 0;
}

.leaderboard-preview .toggle-btn {
    display: none;
}

.leaderboard-preview-content {
    padding: 10px 15px;
}

.leaderboard-item-mini {
    display: flex;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.leaderboard-item-mini .rank {
    width: 30px;
    font-weight: bold;
    color: var(--text-secondary);
}

.leaderboard-item-mini .rank.top-1 {
    color: #fbbf24;
}

.leaderboard-item-mini .rank.top-2 {
    color: #9ca3af;
}

.leaderboard-item-mini .rank.top-3 {
    color: #cd7f32;
}

.leaderboard-item-mini .username {
    flex: 1;
    font-weight: 500;
}

.leaderboard-item-mini .score {
    font-weight: bold;
    color: var(--primary-color);
}

.card-footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--background-color);
}

/* 移动端排行榜预览折叠 */
@media (max-width: 768px) {
    .leaderboard-preview .card-header {
        cursor: pointer;
    }
    
    .leaderboard-preview .toggle-btn {
        display: inline-flex;
    }
    
    .leaderboard-preview .leaderboard-preview-content {
        display: none;
    }
    
    .leaderboard-preview .card-footer {
        display: none;
    }
    
    .leaderboard-preview.expanded .leaderboard-preview-content {
        display: block;
    }
    
    .leaderboard-preview.expanded .card-footer {
        display: block;
    }
}

/* ==================== 页脚样式 ==================== */

.site-footer {
    background-color: var(--card-background);
    border-top: 1px solid var(--border-color);
    padding: 20px;
    text-align: center;
    margin-top: 40px;
}

.site-footer .icp-info {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.site-footer .icp-info a {
    color: var(--text-secondary);
    text-decoration: none;
}

.site-footer .icp-info a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .site-footer {
        padding: 15px;
        margin-top: 20px;
    }
    
    .site-footer .icp-info {
        font-size: 0.75rem;
    }
}