/**
 * 活动中心 - 现代美学设计系统
 * Activity Center - Modern Design System
 *
 * 设计理念: 活力、现代、温暖、专业
 * 配色主轴: 活力橙 #FF6B35 + 科技蓝 #4A90E2
 */

:root {
    /* ========================================
   * 主题色彩系统
   * ======================================== */
    /* 主色 - 活力橙 */
    --activity-primary: #FF6B35;
    --activity-primary-light: #FF8F66;
    --activity-primary-dark: #E55A2B;
    --activity-primary-gradient: linear-gradient(135deg, #FF6B35 0%, #FF8F66 100%);
    /* 辅助色 - 科技蓝 */
    --activity-secondary: #4A90E2;
    --activity-secondary-light: #6BA3E5;
    --activity-secondary-dark: #3A7BC8;
    --activity-secondary-gradient: linear-gradient(135deg, #4A90E2 0%, #6BA3E5 100%);
    /* 成功色 */
    --activity-success: #52C41A;
    --activity-success-light: #73D13D;
    --activity-success-gradient: linear-gradient(135deg, #52C41A 0%, #73D13D 100%);
    /* 警告色 */
    --activity-warning: #FAAD14;
    --activity-warning-light: #FFC53D;
    --activity-warning-gradient: linear-gradient(135deg, #FAAD14 0%, #FFC53D 100%);
    /* 危险色 */
    --activity-danger: #FF4D4F;
    --activity-danger-light: #FF7875;
    --activity-danger-gradient: linear-gradient(135deg, #FF4D4F 0%, #FF7875 100%);
    /* 信息色 */
    --activity-info: #13C2C2;
    --activity-info-light: #36CBCB;
    --activity-info-gradient: linear-gradient(135deg, #13C2C2 0%, #36CBCB 100%);
    /* 中性色 */
    --activity-dark: #1A1A2E;
    --activity-gray-900: #262640;
    --activity-gray-800: #3D3D5C;
    --activity-gray-700: #5C5C7A;
    --activity-gray-600: #7A7A99;
    --activity-gray-500: #9999B3;
    --activity-gray-400: #B3B3CC;
    --activity-gray-300: #CCCCDD;
    --activity-gray-200: #E6E6F0;
    --activity-gray-100: #F5F5FA;
    --activity-white: #FFFFFF;
    /* 背景色 */
    --activity-bg-primary: #FFFFFF;
    --activity-bg-secondary: #F8F9FC;
    --activity-bg-tertiary: #F0F2F8;
    --activity-bg-dark: #1A1A2E;
    /* 渐变背景 */
    --activity-gradient-hero: linear-gradient(135deg, #FF6B35 0%, #4A90E2 50%, #1A1A2E 100%);
    --activity-gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 107, 53, 0.05) 100%);
    --activity-gradient-overlay: linear-gradient(180deg, rgba(26, 26, 46, 0) 0%, rgba(26, 26, 46, 0.8) 100%);
    /* ========================================
   * 阴影系统
   * ======================================== */
    --activity-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --activity-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --activity-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --activity-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    /* 彩色阴影 */
    --activity-shadow-primary: 0 8px 24px rgba(255, 107, 53, 0.25);
    --activity-shadow-secondary: 0 8px 24px rgba(74, 144, 226, 0.25);
    --activity-shadow-success: 0 8px 24px rgba(82, 196, 26, 0.25);
    /* ========================================
   * 圆角系统
   * ======================================== */
    --activity-radius-sm: 6px;
    --activity-radius-md: 12px;
    --activity-radius-lg: 16px;
    --activity-radius-xl: 24px;
    --activity-radius-full: 9999px;
    /* ========================================
   * 间距系统
   * ======================================== */
    --activity-space-xs: 4px;
    --activity-space-sm: 8px;
    --activity-space-md: 16px;
    --activity-space-lg: 24px;
    --activity-space-xl: 32px;
    --activity-space-2xl: 48px;
    --activity-space-3xl: 64px;
    /* ========================================
   * 动画系统
   * ======================================== */
    --activity-transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --activity-transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --activity-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --activity-transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    /* 入场动画 */
    --activity-animation-fadeIn: fadeIn 0.6s ease-out;
    --activity-animation-slideUp: slideUp 0.6s ease-out;
    --activity-animation-scaleIn: scaleIn 0.4s ease-out;
    /* ========================================
   * 字体系统
   * ======================================== */
    --activity-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --activity-font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}


/* ========================================
 * 基础样式重置和增强
 * ======================================== */

.activity-container {
    background: var(--activity-bg-secondary);
    min-height: 100vh;
}

.activity-content {
    position: relative;
    z-index: 1;
}


/* ========================================
 * 导航栏美化
 * ======================================== */

.navbar-activity {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--activity-gray-200);
    box-shadow: var(--activity-shadow-sm);
    transition: var(--activity-transition-base);
}

.navbar-activity .navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--activity-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--activity-transition-base);
}

.navbar-activity .navbar-brand:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.navbar-activity .nav-link {
    font-weight: 500;
    color: var(--activity-gray-700) !important;
    padding: 0.75rem 1.25rem !important;
    border-radius: var(--activity-radius-md);
    transition: var(--activity-transition-base);
    position: relative;
}

.navbar-activity .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--activity-primary-gradient);
    border-radius: var(--activity-radius-full);
    transition: var(--activity-transition-base);
}

.navbar-activity .nav-link:hover::after,
.navbar-activity .nav-link.active::after {
    width: 60%;
}

.navbar-activity .nav-link:hover {
    color: var(--activity-primary) !important;
    background: rgba(255, 107, 53, 0.05);
}

.navbar-activity .nav-link.active {
    color: var(--activity-primary) !important;
    font-weight: 600;
}


/* 用户头像 */

.navbar-activity .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--activity-radius-full);
    border: 2px solid var(--activity-gray-200);
    transition: var(--activity-transition-base);
    object-fit: cover;
}

.navbar-activity .user-avatar:hover {
    border-color: var(--activity-primary);
    box-shadow: var(--activity-shadow-primary);
    transform: scale(1.1);
}


/* ========================================
 * 卡片组件美化
 * ======================================== */

.activity-card {
    background: var(--activity-white);
    border: none;
    border-radius: var(--activity-radius-lg);
    box-shadow: var(--activity-shadow-md);
    transition: var(--activity-transition-base);
    overflow: hidden;
    position: relative;
}

.activity-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--activity-primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--activity-transition-base);
}

.activity-card:hover::before {
    transform: scaleX(1);
}

.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--activity-shadow-xl);
}

.activity-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--activity-gray-200);
    padding: 1.5rem 2rem;
    font-weight: 600;
}

.activity-card .card-body {
    padding: 2rem;
}


/* 活动卡片特殊样式 */

.activity-card-compact {
    cursor: pointer;
}

.activity-card-compact .card-img-top {
    transition: var(--activity-transition-slow);
    position: relative;
    overflow: hidden;
}

.activity-card-compact .card-img-top::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: var(--activity-gradient-overlay);
    opacity: 0;
    transition: var(--activity-transition-base);
}

.activity-card-compact:hover .card-img-top {
    transform: scale(1.1);
}

.activity-card-compact:hover .card-img-top::after {
    opacity: 1;
}


/* ========================================
 * 按钮组件美化
 * ======================================== */

.btn-activity-primary {
    background: var(--activity-primary-gradient);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: var(--activity-radius-md);
    transition: var(--activity-transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--activity-shadow-primary);
}

.btn-activity-primary::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: var(--activity-transition-slow);
}

.btn-activity-primary:hover::before {
    left: 100%;
}

.btn-activity-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.35);
    filter: brightness(1.1);
}

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

.btn-activity-secondary {
    background: var(--activity-secondary-gradient);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: var(--activity-radius-md);
    transition: var(--activity-transition-base);
    box-shadow: var(--activity-shadow-secondary);
}

.btn-activity-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(74, 144, 226, 0.35);
    filter: brightness(1.1);
    color: white;
}

.btn-activity-outline {
    background: transparent;
    border: 2px solid var(--activity-primary);
    color: var(--activity-primary);
    font-weight: 600;
    padding: 0.625rem 1.875rem;
    border-radius: var(--activity-radius-md);
    transition: var(--activity-transition-base);
}

.btn-activity-outline:hover {
    background: var(--activity-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--activity-shadow-primary);
}


/* 按钮组增强 */

.btn-group-activity {
    gap: 0.5rem;
}

.btn-group-activity .btn {
    border-radius: var(--activity-radius-md);
    font-weight: 500;
    transition: var(--activity-transition-base);
}

.btn-group-activity .btn:hover {
    transform: translateY(-2px);
}

.btn-group-activity .btn.active {
    background: var(--activity-primary-gradient);
    border-color: transparent;
    box-shadow: var(--activity-shadow-primary);
}


/* ========================================
 * 表单组件美化
 * ======================================== */

.form-control-activity {
    border: 2px solid var(--activity-gray-300);
    border-radius: var(--activity-radius-md);
    padding: 0.75rem 1rem;
    transition: var(--activity-transition-base);
    background: white;
}

.form-control-activity:focus {
    border-color: var(--activity-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
    outline: none;
}

.form-control-activity::placeholder {
    color: var(--activity-gray-500);
}

.form-select-activity {
    border: 2px solid var(--activity-gray-300);
    border-radius: var(--activity-radius-md);
    padding: 0.75rem 1rem;
    transition: var(--activity-transition-base);
    cursor: pointer;
}

.form-select-activity:focus {
    border-color: var(--activity-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
    outline: none;
}


/* ========================================
 * 徽章和标签美化
 * ======================================== */

.badge-activity {
    padding: 0.5rem 1rem;
    border-radius: var(--activity-radius-full);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-activity-primary {
    background: var(--activity-primary-gradient);
    color: white;
}

.badge-activity-secondary {
    background: var(--activity-secondary-gradient);
    color: white;
}

.badge-activity-success {
    background: var(--activity-success-gradient);
    color: white;
}

.badge-activity-warning {
    background: var(--activity-warning-gradient);
    color: white;
}

.badge-activity-danger {
    background: var(--activity-danger-gradient);
    color: white;
}

.badge-activity-info {
    background: var(--activity-info-gradient);
    color: white;
}


/* ========================================
 * 统计卡片美化
 * ======================================== */

.stats-card {
    background: var(--activity-white);
    border: none;
    border-radius: var(--activity-radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--activity-transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--activity-shadow-md);
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--activity-gradient-card);
    opacity: 0;
    transition: var(--activity-transition-base);
}

.stats-card:hover::before {
    opacity: 1;
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--activity-shadow-lg);
}

.stats-card .stats-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--activity-radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1rem;
    transition: var(--activity-transition-base);
}

.stats-card:hover .stats-icon {
    transform: scale(1.1) rotate(5deg);
}

.stats-card .stats-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    transition: var(--activity-transition-base);
}

.stats-card:hover .stats-value {
    transform: scale(1.05);
}

.stats-card .stats-label {
    font-size: 0.875rem;
    color: var(--activity-gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}


/* ========================================
 * 快捷入口卡片美化
 * ======================================== */

.quick-access-card {
    background: var(--activity-white);
    border: 2px solid var(--activity-gray-200);
    border-radius: var(--activity-radius-lg);
    padding: 2rem;
    text-align: center;
    text-decoration: none;
    color: var(--activity-gray-800);
    transition: var(--activity-transition-base);
    position: relative;
    overflow: hidden;
}

.quick-access-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--activity-primary-gradient);
    transform: scaleX(0);
    transition: var(--activity-transition-base);
}

.quick-access-card:hover::before {
    transform: scaleX(1);
}

.quick-access-card:hover {
    border-color: var(--activity-primary);
    transform: translateY(-6px);
    box-shadow: var(--activity-shadow-lg);
    color: var(--activity-primary);
}

.quick-access-card .quick-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--activity-radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    transition: var(--activity-transition-base);
}

.quick-access-card:hover .quick-icon {
    transform: scale(1.15) rotate(-5deg);
}

.quick-access-card .quick-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.quick-access-card .quick-desc {
    font-size: 0.875rem;
    color: var(--activity-gray-600);
    margin-bottom: 0;
}


/* ========================================
 * 列表卡片美化
 * ======================================== */

.list-card {
    background: var(--activity-white);
    border: none;
    border-radius: var(--activity-radius-lg);
    padding: 0;
    transition: var(--activity-transition-base);
    box-shadow: var(--activity-shadow-sm);
    overflow: hidden;
}

.list-card:hover {
    box-shadow: var(--activity-shadow-md);
    transform: translateX(4px);
}

.list-card-item {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--activity-gray-200);
    transition: var(--activity-transition-base);
    text-decoration: none;
    color: inherit;
    display: block;
}

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

.list-card-item:hover {
    background: rgba(255, 107, 53, 0.03);
    padding-left: 2.5rem;
}


/* ========================================
 * 空状态美化
 * ======================================== */

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--activity-gray-600);
}

.empty-state .empty-icon {
    font-size: 4rem;
    color: var(--activity-gray-400);
    margin-bottom: 1.5rem;
    transition: var(--activity-transition-base);
}

.empty-state:hover .empty-icon {
    color: var(--activity-primary);
    transform: scale(1.1);
}

.empty-state .empty-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--activity-gray-800);
}

.empty-state .empty-desc {
    font-size: 1rem;
    margin-bottom: 2rem;
    color: var(--activity-gray-600);
}


/* ========================================
 * 动画效果
 * ======================================== */

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes bounce {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.animate-fade-in {
    animation: var(--activity-animation-fadeIn);
}

.animate-slide-up {
    animation: var(--activity-animation-slideUp);
}

.animate-scale-in {
    animation: var(--activity-animation-scaleIn);
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-bounce {
    animation: bounce 1s ease-in-out infinite;
}


/* 延迟动画 */

.delay-100 {
    animation-delay: 0.1s;
}

.delay-200 {
    animation-delay: 0.2s;
}

.delay-300 {
    animation-delay: 0.3s;
}

.delay-400 {
    animation-delay: 0.4s;
}

.delay-500 {
    animation-delay: 0.5s;
}


/* ========================================
 * 渐变文字效果
 * ======================================== */

.gradient-text {
    background: var(--activity-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-blue {
    background: var(--activity-secondary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* ========================================
 * 分页美化
 * ======================================== */

.pagination-activity {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

.pagination-activity .page-link {
    border: 2px solid var(--activity-gray-300);
    border-radius: var(--activity-radius-md);
    padding: 0.625rem 1rem;
    color: var(--activity-gray-700);
    font-weight: 600;
    transition: var(--activity-transition-base);
}

.pagination-activity .page-link:hover {
    border-color: var(--activity-primary);
    color: var(--activity-primary);
    background: rgba(255, 107, 53, 0.05);
    transform: translateY(-2px);
}

.pagination-activity .page-item.active .page-link {
    background: var(--activity-primary-gradient);
    border-color: var(--activity-primary);
    color: white;
    box-shadow: var(--activity-shadow-primary);
}

.pagination-activity .page-item.disabled .page-link {
    border-color: var(--activity-gray-200);
    color: var(--activity-gray-400);
}


/* ========================================
 * 底部美化
 * ======================================== */

.footer-activity {
    background: var(--activity-bg-dark);
    color: var(--activity-gray-300);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-activity h5 {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-activity a {
    color: var(--activity-gray-400);
    text-decoration: none;
    transition: var(--activity-transition-base);
}

.footer-activity a:hover {
    color: var(--activity-primary);
    padding-left: 4px;
}

.footer-activity .footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--activity-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* ========================================
 * 加载状态
 * ======================================== */

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--activity-gray-300);
    border-top-color: var(--activity-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}


/* ========================================
 * 响应式适配
 * ======================================== */

@media (max-width: 768px) {
    .activity-card .card-body {
        padding: 1.5rem;
    }
    .stats-card {
        padding: 1.5rem;
    }
    .stats-card .stats-value {
        font-size: 2rem;
    }
    .quick-access-card {
        padding: 1.5rem;
    }
    .quick-access-card .quick-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
    .btn-activity-primary,
    .btn-activity-secondary {
        padding: 0.625rem 1.5rem;
    }
}


/* ========================================
 * 特殊效果类
 * ======================================== */

.glass-effect {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hover-lift {
    transition: var(--activity-transition-base);
}

.hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: var(--activity-shadow-lg);
}

.text-gradient {
    background: linear-gradient(135deg, var(--activity-primary), var(--activity-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box, var(--activity-primary-gradient) border-box;
}

/* ========================================
 * 移动端触屏友好 (B10 修复)
 * Apple HIG 推荐触摸目标 ≥ 44pt，Google Material ≥ 48dp。
 * 活动中心所有可点击元素统一提升到 48px。
 * ======================================== */
.btn,
.btn-activity-primary,
.btn-activity-secondary,
.btn-activity-outline,
.btn-outline-secondary,
.btn-sm,
.btn-group .btn {
    min-height: 48px;
    padding-top: 0.65rem;
    padding-bottom: 0.65rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-sm {
    min-height: 40px; /* 小号按钮允许 40px，但仍 ≥ 40 */
    padding-top: 0.4rem;
    padding-bottom: 0.4rem;
}

.list-group-item {
    min-height: 64px;
    padding-top: 0.85rem;
    padding-bottom: 0.85rem;
}

/* 评分星星增大，避免误触 */
.fa-star,
.fa-star-o {
    pointer-events: auto;
    padding: 6px;
}

/* 表单元素同样提升可点击区 */
.form-control,
.form-select,
.input-group .form-control {
    min-height: 48px;
}

/* 触摸时的反馈 */
.btn:active,
.list-group-item:active,
.activity-card:active {
    transform: scale(0.98);
    transition: transform 0.05s ease;
}

/* 移动端隐藏次要文字 */
@media (max-width: 575.98px) {
    .btn-group .btn {
        font-size: 0.875rem;
    }
    .pagination li a,
    .pagination li span {
        min-width: 44px;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}