/* ==================== task-center.css ==================== */
/* 任务中心样式 - 毛玻璃风格版本 (性能优化版)
 *
 * 优化参考:
 * - Google Core Web Vitals (CLS, LCP)
 * - Apple Safari 性能优化指南
 * - Chrome DevTools 渲染性能建议
 *
 * 主要优化:
 * 1. contain 属性限制重绘范围
 * 2. will-change 提示浏览器预优化
 * 3. GPU 加速动画 (transform, opacity)
 * 4. 减少 backdrop-filter 使用层级
 * 5. 简化选择器提升解析速度
 */

/* ==================== 根级CSS变量定义 ==================== */
:root {
    /* z-index层级管理 */
    --z-dropdown: 1000;
    --z-modal-backdrop: 9000;
    --z-modal: 9100;
    --z-task-center: 9200;
    --z-loading: 9300;
    --z-notification: 9500;

    /* 性能优化：动画时长统一管理 */
    --tc-transition-fast: 0.15s;
    --tc-transition-normal: 0.25s;
    --tc-transition-slow: 0.35s;

    /* 毛玻璃效果变量 - 便于统一调整 */
    --tc-blur-light: blur(4px);
    --tc-blur-medium: blur(8px);
    --tc-blur-heavy: blur(12px);
}

/* ==================== 任务中心模态框基础样式 ==================== */
.task-center-modal {
    position: fixed;
    inset: 0; /* 简化 top/left/right/bottom */
    width: 100vw;
    height: 100vh;
    background: var(--modal-overlay-light);
    /* 性能优化：只在显示时启用 backdrop-filter */
    justify-content: center;
    align-items: center;
    z-index: var(--z-task-center);
    overflow: hidden;
    box-sizing: border-box;
    overscroll-behavior: contain;
    /* 默认隐藏，防止闪烁 */
    display: flex; /* 改用 flex + visibility 控制，避免 display 切换触发重排 */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    /* 性能优化：使用 GPU 加速的属性 */
    transition: opacity var(--tc-transition-normal) ease-out,
                visibility var(--tc-transition-normal) ease-out;
    /* 性能优化：限制重绘范围 */
    contain: layout style;
    /* 性能优化：提示浏览器预优化 */
    will-change: opacity, visibility;
}

/* 显示状态 */
.task-center-modal.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    backdrop-filter: var(--tc-blur-light);
    -webkit-backdrop-filter: var(--tc-blur-light);
}

/* 隐藏状态 */
.task-center-modal.hide {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.task-center-modal-overlay {
    position: absolute;
    inset: 0; /* 简化 */
    background: transparent;
    cursor: pointer;
}

.task-center-modal-content {
    position: relative;
    background: var(--modal-content-translucent);
    /* 性能优化：只在可见时应用 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 24px;
    width: 90%;
    max-width: 600px;
    height: auto;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15),
                0 2px 8px rgba(0, 0, 0, 0.1);
    /* 性能优化：使用 GPU 加速属性 */
    transform: translateY(30px) scale(0.9);
    opacity: 0;
    transition: transform var(--tc-transition-slow) cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity var(--tc-transition-normal) ease-out;
    /* 性能优化：限制重绘范围 */
    contain: layout style paint;
    will-change: transform, opacity;
    margin: auto;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
}

/* 性能优化：只在显示时启用 backdrop-filter，减少性能开销 */
.task-center-modal.show .task-center-modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
    backdrop-filter: var(--tc-blur-heavy) saturate(180%);
    -webkit-backdrop-filter: var(--tc-blur-heavy) saturate(180%);
}

/* ==================== 任务中心头部 ==================== */
.task-center-modal-header {
    padding: 1.25rem 1.75rem;
    background: rgba(255, 255, 255, 0.2);
    /* 性能优化：移除嵌套 backdrop-filter，父元素已有 */
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
    position: relative;
    text-align: center;
    border-radius: 24px 24px 0 0;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* 性能优化 */
    contain: layout style;
}

.header-content {
    flex: 1;
    text-align: center;
}

.task-center-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.task-center-title i {
    font-size: 1.4rem;
    background: linear-gradient(135deg, #FCF4C5 0%, #f7e5a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: crownPulse 2s ease-in-out infinite;
}

@keyframes crownPulse {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(5deg); }
}

.header-subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.4;
    font-weight: 500;
}

.task-center-subtitle {
    color: var(--color-text-secondary);
    font-size: 13px;
    margin: 0;
    font-weight: 500;
}

.task-center-modal-close {
    background: rgba(255, 255, 255, 0.2);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #4b5563;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    /* 性能优化：只使用 GPU 加速的 transform */
    transition: transform var(--tc-transition-normal) cubic-bezier(0.4, 0, 0.2, 1),
                background var(--tc-transition-fast) ease;
    flex-shrink: 0;
    will-change: transform;
}

.task-center-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg) scale(1.1);
}

/* ==================== 任务中心选项卡 ==================== */
.task-center-tabs {
    display: flex;
    justify-content: center;
    margin: 1rem auto;
    gap: 1rem;
    padding: 0 1.5rem;
    flex-shrink: 0;
    border-bottom: none !important;
    /* 性能优化 */
    contain: layout style;
}

.task-center-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.25);
    /* 性能优化：移除 backdrop-filter，父元素已有 */
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                background var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease;
    text-decoration: none;
    outline: none;
    position: relative;
    overflow: hidden;
    /* 性能优化：开启 GPU 加速 */
    transform: translateZ(0);
    will-change: transform;
    contain: layout style;
}

.task-center-tab::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
}

.task-center-tab:hover {
    transform: translateY(-2px) scale(1.02);
    background: rgba(255, 255, 255, 0.35);
    box-shadow: 0 4px 12px rgba(31, 38, 135, 0.15),
                inset 0 1px 1px rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.task-center-tab:hover .tab-icon,
.task-center-tab:hover .tab-text {
    color: var(--color-info);
}

.task-center-tab.active {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.25);
    color: #8b5cf6 !important;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.15),
                inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

.task-center-tab.active * {
    color: #8b5cf6 !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.task-center-modal .task-center-tab.active::after {
    display: none !important;
}

.task-center-tab .tab-icon {
    font-size: var(--font-size-base);
    transition: transform 0.3s ease;
    display: inline-block;
    line-height: 1;
}

.task-center-tab:hover .tab-icon {
    transform: scale(1.1);
}

.task-center-tab .tab-text {
    display: inline-block;
    line-height: 1;
    white-space: nowrap;
}

/* 确保文字可见性 */
.task-center-modal * {
    -webkit-text-fill-color: initial;
}

.task-center-tab.active .tab-icon,
.task-center-tab.active .tab-text {
    color: #8b5cf6 !important;
    opacity: 1 !important;
    visibility: visible !important;
    display: inline-block !important;
}

.task-center-tab .tab-text,
.task-center-tab .tab-icon {
    display: inline-block !important;
    opacity: 1 !important;
    visibility: visible !important;
    color: inherit;
}

.task-center-tab span,
.task-center-tab i {
    opacity: 1 !important;
    visibility: visible !important;
    -webkit-text-fill-color: currentColor !important;
}

.task-center-modal .task-center-tab.active,
.task-center-modal .task-center-tab.active * {
    color: #8b5cf6 !important;
    -webkit-text-fill-color: #8b5cf6 !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.task-center-modal .task-center-tab .tab-text,
.task-center-modal .task-center-tab .tab-icon {
    color: inherit !important;
    -webkit-text-fill-color: inherit !important;
}

.task-center-modal .task-center-tab.active {
    background: rgba(139, 92, 246, 0.08) !important;
    -webkit-background-clip: initial !important;
    -webkit-text-fill-color: #8b5cf6 !important;
    background-clip: initial !important;
}

.task-center-modal .task-center-tab.active .tab-text,
.task-center-modal .task-center-tab.active .tab-icon,
.task-center-modal .task-center-tab.active span,
.task-center-modal .task-center-tab.active i {
    -webkit-text-fill-color: #8b5cf6 !important;
    color: #8b5cf6 !important;
    opacity: 1 !important;
    visibility: visible !important;
}

/* ==================== 选项卡内容 ==================== */
.task-center-tab-content {
    display: none;
    padding: 1.5rem;
    /* 性能优化：动画使用 GPU 加速属性 */
    animation: fadeInUp var(--tc-transition-normal) ease-out;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    min-height: 0;
    max-height: calc(85vh - 200px);
    scrollbar-width: thin;
    scrollbar-color: rgba(155, 155, 155, 0.3) transparent;
    /* 增加内容区域背景,提高可读性 */
    background: rgba(255, 255, 255, 0.25);
    /* 性能优化：移除嵌套 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-xl);
    margin: 0 1rem 1rem 1rem;
    position: relative;
    /* 性能优化 */
    contain: layout style;
    will-change: opacity, transform;
}

/* 为内容区域增加渐变覆盖层,增强层次感 */
.task-center-tab-content::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
    border-radius: var(--radius-xl);
}

.task-center-tab-content::-webkit-scrollbar {
    width: 6px;
}

.task-center-tab-content::-webkit-scrollbar-track {
    background: transparent;
}

.task-center-tab-content::-webkit-scrollbar-thumb {
    background: rgba(155, 155, 155, 0.3);
    border-radius: 3px;
}

.task-center-tab-content.active {
    display: flex;
    flex-direction: column;
}

/* ==================== 签到部分样式 ==================== */
.task-center-checkin-section, .checkin-section {
    text-align: center;
    padding: 0;
}

.task-center-checkin-title h4, .checkin-title h4,
.task-center-rewards-title h4, .rewards-title h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.task-center-checkin-subtitle, .checkin-subtitle,
.task-center-rewards-subtitle, .rewards-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

/* 福利标签样式 */
.checkin-benefits,
.rewards-benefits {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
}

.benefit-tag {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: #8b5cf6;
    padding: 0.4rem 0.75rem;
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease;
}

.benefit-tag:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.2);
}

.benefit-tag i {
    font-size: 11px;
}

/* 说明卡片样式 */
.task-center-checkin-description, .checkin-description,
.task-center-rewards-description, .rewards-description {
    margin-bottom: 1.25rem;
}

.task-center-description-card, .description-card {
    background: rgba(255, 255, 255, 0.25);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-xl);
    padding: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease;
    position: relative;
    overflow: hidden;
    /* 性能优化 */
    contain: layout style;
}

.task-center-description-card::before, .description-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
}

.task-center-description-card:hover, .description-card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.35);
    box-shadow: 0 6px 20px rgba(31, 38, 135, 0.15),
                inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

.task-center-description-card i, .description-card i {
    color: var(--color-info);
    font-size: var(--font-size-base);
    margin-top: 2px;
    flex-shrink: 0;
}

.task-center-description-text, .description-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text-primary);
}

.task-center-description-text strong, .description-text strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* 签到日历美化 */
.task-center-checkin-calendar, .checkin-calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    /* 性能优化 */
    contain: layout style;
}

.task-center-checkin-day, .checkin-day {
    background: rgba(255, 255, 255, 0.25);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 10px;
    padding: 0.4rem 0.3rem;
    text-align: center;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease;
    position: relative;
    overflow: hidden;
    min-height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* 性能优化：GPU 加速 */
    transform: translateZ(0);
    will-change: transform;
    contain: layout style;
}

.task-center-checkin-day::before, .checkin-day::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
}

.task-center-checkin-day.checked, .checkin-day.checked {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.15) 100%);
    border: 2px solid rgba(16, 185, 129, 0.4);
    color: var(--color-success);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2),
                inset 0 1px 1px rgba(255, 255, 255, 0.2);
    font-weight: 700;
}

.task-center-checkin-day.today-pending, .checkin-day.today-pending {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(249, 115, 22, 0.15) 100%);
    border: 1px solid rgba(245, 158, 11, 0.3);
    animation: todayPulse 2s infinite;
    position: relative;
}

@keyframes todayPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(245, 158, 11, 0);
    }
}

.task-center-day-number, .checkin-day-number {
    font-size: var(--font-size-sm);
    font-weight: 700;
    margin-bottom: 2px;
    line-height: 1;
}

.task-center-day-label, .checkin-day-label {
    font-size: 9px;
    margin-bottom: 3px;
    opacity: 0.8;
    line-height: 1;
}

.task-center-checkin-reward, .checkin-reward {
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    line-height: 1;
}

.task-center-checkin-reward i, .checkin-reward i {
    font-size: 8px;
}

/* 签到按钮美化 */
.task-center-checkin-action, .checkin-action {
    text-align: center;
    margin-top: 1.25rem;
}

/* 通用签到按钮样式 */
.checkin-btn, .task-center-checkin-btn, #checkinButton {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--color-secondary);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease,
                background var(--tc-transition-fast) ease;
    position: relative;
    overflow: hidden;
    min-width: 160px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    outline: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    /* 性能优化：GPU 加速 */
    transform: translateZ(0);
    will-change: transform;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

/* 按钮光效动画 */
.checkin-btn::before, .task-center-checkin-btn::before, #checkinButton::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 ease;
}

/* 悬停效果 */
.checkin-btn:hover:not(.checked):not(:disabled),
.task-center-checkin-btn:hover:not(.checked):not(:disabled),
#checkinButton:hover:not(.checked):not(:disabled) {
    transform: translateY(-2px);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.25) 0%, rgba(139, 92, 246, 0.25) 100%);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.2),
                inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.checkin-btn:hover:not(.checked):not(:disabled)::before,
.task-center-checkin-btn:hover:not(.checked):not(:disabled)::before,
#checkinButton:hover:not(.checked):not(:disabled)::before {
    left: 100%;
}

/* 已签到状态 */
.checkin-btn.checked, .checkin-btn:disabled,
.task-center-checkin-btn.checked, .task-center-checkin-btn:disabled,
#checkinButton.checked, #checkinButton:disabled {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
    cursor: default;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2),
                inset 0 1px 1px rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

/* 已签到状态的特殊光效 */
.checkin-btn.checked::after, .checkin-btn:disabled::after,
.task-center-checkin-btn.checked::after, .task-center-checkin-btn:disabled::after,
#checkinButton.checked::after, #checkinButton:disabled::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 70%);
    animation: checkedShimmer 3s ease-in-out infinite;
}

/* 已签到状态的闪烁动画 */
@keyframes checkedShimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

/* 已签到状态的图标动画 */
.checkin-btn.checked i, .checkin-btn:disabled i,
.task-center-checkin-btn.checked i, .task-center-checkin-btn:disabled i,
#checkinButton.checked i, #checkinButton:disabled i {
    animation: checkIconBounce 1s ease-in-out;
    color: var(--color-success);
}

@keyframes checkIconBounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) scale(1);
    }
    40% {
        transform: translateY(-8px) scale(1.2);
    }
    60% {
        transform: translateY(-4px) scale(1.1);
    }
}

/* 成功状态兼容 */
.checkin-btn.success, .task-center-checkin-btn.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
    cursor: default;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2);
}

/* 禁用状态优先 */
.checkin-btn:disabled:not(.checked),
.task-center-checkin-btn:disabled:not(.checked),
#checkinButton:disabled:not(.checked) {
    background: rgba(156, 163, 175, 0.1);
    color: var(--color-text-tertiary);
    cursor: not-allowed;
    transform: none !important;
    border-color: rgba(156, 163, 175, 0.2);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.checkin-btn:disabled:not(.checked)::before,
.task-center-checkin-btn:disabled:not(.checked)::before,
#checkinButton:disabled:not(.checked)::before,
.checkin-btn:disabled:not(.checked)::after,
.task-center-checkin-btn:disabled:not(.checked)::after,
#checkinButton:disabled:not(.checked)::after {
    display: none;
}

/* ==================== 签到规则 ==================== */
.checkin-rules {
    text-align: left;
    background: rgba(251, 191, 36, 0.08);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
    /* 性能优化 */
    contain: layout style;
}

.checkin-rules::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
}

.checkin-rules-title {
    font-weight: 700;
    color: #92400e;
    margin-bottom: 0.5rem;
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.checkin-rules-title i {
    color: var(--color-warning);
    font-size: var(--font-size-sm);
}

.checkin-rules-list {
    color: #78350f;
    font-size: var(--font-size-xs);
    line-height: 1.5;
}

.checkin-rules-list div {
    margin-bottom: 2px;
    padding-left: 12px;
    text-indent: -12px;
}

/* ==================== 奖励部分样式 ==================== */
.task-center-rewards-section, .rewards-section {
    text-align: center;
    padding: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-center-rewards-list, .rewards-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
    /* 性能优化 */
    contain: layout style;
}

.task-center-reward-item, .reward-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.25);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-xl);
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease,
                background var(--tc-transition-fast) ease;
    position: relative;
    overflow: hidden;
    min-height: 56px;
    /* 性能优化：GPU 加速 */
    transform: translateZ(0);
    will-change: transform;
    contain: layout style;
}

.task-center-reward-item::before, .reward-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.05), transparent);
    transition: left 0.6s ease;
}

.task-center-reward-item:hover, .reward-item:hover {
    transform: translateX(4px);
    background: rgba(255, 255, 255, 0.35);
    box-shadow: 0 6px 20px rgba(31, 38, 135, 0.15),
                inset 0 1px 1px rgba(255, 255, 255, 0.2);
    border-color: rgba(139, 92, 246, 0.25);
}

.task-center-reward-item:hover::before, .reward-item:hover::before {
    left: 100%;
}

.task-center-reward-icon, .reward-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    color: #8b5cf6;
    font-size: var(--font-size-base);
    flex-shrink: 0;
    transition: all var(--transition-normal) ease;
}

.task-center-reward-item:hover .task-center-reward-icon,
.reward-item:hover .reward-icon {
    transform: rotate(360deg) scale(1.1);
}

.task-center-reward-icon.completed, .reward-icon.completed {
    background: linear-gradient(135deg, #ffd700 0%, #ffb347 100%);
    color: var(--color-secondary);
    box-shadow: 0 3px 12px rgba(255, 183, 71, 0.4);
    position: relative;
    overflow: hidden;
}

.task-center-reward-icon.completed::before, .reward-icon.completed::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.task-center-reward-content, .reward-content {
    flex: 1;
    text-align: left;
    min-width: 0;
}

.task-center-reward-name, .reward-name {
    font-weight: 700;
    color: var(--color-text-primary);
    font-size: 13px;
    margin-bottom: 2px;
    line-height: 1.3;
}

.task-center-reward-coins, .reward-coins {
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 700;
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: 0.5rem;
    font-size: var(--font-size-sm);
}

.task-center-reward-coins i, .reward-coins i {
    font-size: var(--font-size-sm);
    color: var(--color-warning);
    animation: coinSpin 2s ease-in-out infinite;
}

@keyframes coinSpin {
    0%, 100% { transform: rotateY(0deg); }
    50% { transform: rotateY(180deg); }
}

.task-center-reward-action, .reward-action {
    flex-shrink: 0;
}

.task-center-reward-btn, .reward-btn {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    /* 性能优化：移除 backdrop-filter */
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--color-secondary);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-lg);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    /* 性能优化：只使用 GPU 加速属性 */
    transition: transform var(--tc-transition-fast) ease,
                box-shadow var(--tc-transition-fast) ease,
                background var(--tc-transition-fast) ease;
    min-width: 65px;
    height: 30px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    /* 性能优化：GPU 加速 */
    transform: translateZ(0);
    will-change: transform;
}

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

.task-center-reward-btn:hover:not(.completed):not(.disabled),
.reward-btn:hover:not(.completed):not(.disabled) {
    transform: translateY(-2px);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.25) 0%, rgba(139, 92, 246, 0.25) 100%);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3),
                inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.task-center-reward-btn:hover:not(.completed):not(.disabled)::before,
.reward-btn:hover:not(.completed):not(.disabled)::before {
    width: 150px;
    height: 150px;
}

.task-center-reward-btn.completed, .reward-btn.completed {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
    cursor: default;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
}

.task-center-reward-btn.disabled, .reward-btn.disabled {
    background: rgba(107, 114, 128, 0.1) !important;
    border: 1px solid rgba(107, 114, 128, 0.2) !important;
    color: var(--color-text-tertiary) !important;
    cursor: not-allowed !important;
    opacity: 0.6 !important;
}

.task-center-reward-btn.disabled:hover, .reward-btn.disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* ==================== 功能链接样式 ==================== */
.task-center-feature-link, .feature-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal) ease;
    position: relative;
    display: inline-block;
}

.task-center-feature-link:hover, .feature-link:hover {
    color: #8b5cf6;
    text-decoration: none;
    transform: translateX(2px);
}

.task-center-feature-link::after, .feature-link::after {
    content: "\2192";
    opacity: 0;
    margin-left: 4px;
    transition: opacity 0.3s ease;
    color: #8b5cf6;
    font-weight: bold;
}

.task-center-feature-link:hover::after, .feature-link:hover::after {
    opacity: 1;
}

/* ==================== 加载动画 ==================== */
.loading-skeleton {
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.05) 25%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-lg);
    height: 20px;
    margin: 8px 0;
}

/* ==================== 底部帮助说明样式 ==================== */
.task-center-footer {
    background: rgba(255, 255, 255, 0.05);
    /* 性能优化：移除 backdrop-filter */
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding: 1rem 1.25rem;
    border-radius: 0 0 24px 24px;
    flex-shrink: 0;
    /* 性能优化 */
    contain: layout style;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.help-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.help-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.help-item i {
    color: #8b5cf6;
    font-size: 11px;
    width: 12px;
    flex-shrink: 0;
}

.contact-support {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.support-link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: #8b5cf6;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal) ease;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
}

.support-link:hover {
    color: #7c3aed;
    background: rgba(139, 92, 246, 0.1);
    text-decoration: none;
}

.support-link i {
    font-size: 11px;
}

/* ==================== 加载遮罩层样式 ==================== */
#taskCenterLoadingOverlay {
    z-index: var(--z-loading) !important;
}

/* ==================== 暗色模式适配 ==================== */

/* --- 模态框容器与内容 --- */
html.dark .task-center-modal {
    background: rgba(0, 0, 0, 0.6);
}

html.dark .task-center-modal-content {
    background: rgba(30, 30, 40, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
                0 2px 8px rgba(0, 0, 0, 0.3);
}

/* --- 头部 --- */
html.dark .task-center-modal-header {
    background: rgba(255, 255, 255, 0.06);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

html.dark .task-center-title {
    color: #ffffff;
}

html.dark .header-subtitle,
html.dark .task-center-subtitle {
    color: #a0a0a0;
}

html.dark .task-center-modal-close {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
    color: #b0b0b0;
}

html.dark .task-center-modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

/* --- 选项卡 --- */
html.dark .task-center-tab {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
    color: #a0a0a0;
}

html.dark .task-center-tab::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, transparent 100%);
}

html.dark .task-center-tab:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

html.dark .task-center-tab:hover .tab-icon,
html.dark .task-center-tab:hover .tab-text {
    color: #60a5fa;
}

html.dark .task-center-tab.active {
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.35);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.2);
}

html.dark .task-center-modal .task-center-tab.active {
    background: rgba(139, 92, 246, 0.15) !important;
}

/* --- 选项卡内容区域 --- */
html.dark .task-center-tab-content {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

html.dark .task-center-tab-content::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
}

html.dark .task-center-tab-content::-webkit-scrollbar-thumb {
    background: rgba(155, 155, 155, 0.2);
}

/* --- 签到/奖励区域标题 --- */
html.dark .task-center-checkin-title h4,
html.dark .checkin-title h4,
html.dark .task-center-rewards-title h4,
html.dark .rewards-title h4 {
    color: #ffffff;
}

html.dark .task-center-checkin-subtitle,
html.dark .checkin-subtitle,
html.dark .task-center-rewards-subtitle,
html.dark .rewards-subtitle {
    color: #a0a0a0;
}

/* --- 福利标签 --- */
html.dark .benefit-tag {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
    border-color: rgba(139, 92, 246, 0.3);
    color: #a78bfa;
}

html.dark .benefit-tag:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.25);
}

/* --- 说明卡片 --- */
html.dark .task-center-description-card,
html.dark .description-card {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
}

html.dark .task-center-description-card::before,
html.dark .description-card::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
}

html.dark .task-center-description-card:hover,
html.dark .description-card:hover {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

html.dark .task-center-description-text,
html.dark .description-text {
    color: #c0c0c0;
}

html.dark .task-center-description-text strong,
html.dark .description-text strong {
    color: #e5e5e5;
}

/* --- 签到日历 --- */
html.dark .task-center-checkin-day,
html.dark .checkin-day {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
}

html.dark .task-center-checkin-day::before,
html.dark .checkin-day::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
}

html.dark .task-center-checkin-day.checked,
html.dark .checkin-day.checked {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    border-color: rgba(16, 185, 129, 0.45);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
}

html.dark .task-center-checkin-day.today-pending,
html.dark .checkin-day.today-pending {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(249, 115, 22, 0.2) 100%);
    border-color: rgba(245, 158, 11, 0.35);
}

/* --- 签到按钮 --- */
html.dark .checkin-btn,
html.dark .task-center-checkin-btn,
html.dark #checkinButton {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
    color: #e5e5e5;
}

html.dark .checkin-btn:hover:not(.checked):not(:disabled),
html.dark .task-center-checkin-btn:hover:not(.checked):not(:disabled),
html.dark #checkinButton:hover:not(.checked):not(:disabled) {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.3) 0%, rgba(139, 92, 246, 0.3) 100%);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.25);
}

html.dark .checkin-btn.checked,
html.dark .checkin-btn:disabled,
html.dark .task-center-checkin-btn.checked,
html.dark .task-center-checkin-btn:disabled,
html.dark #checkinButton.checked,
html.dark #checkinButton:disabled {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.25) 0%, rgba(5, 150, 105, 0.25) 100%);
    border-color: rgba(16, 185, 129, 0.35);
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.15);
}

html.dark .checkin-btn:disabled:not(.checked),
html.dark .task-center-checkin-btn:disabled:not(.checked),
html.dark #checkinButton:disabled:not(.checked) {
    background: rgba(107, 114, 128, 0.15);
    border-color: rgba(107, 114, 128, 0.25);
    color: #6b7280;
    box-shadow: none;
}

/* --- 签到规则 --- */
html.dark .checkin-rules {
    background: rgba(251, 191, 36, 0.06);
    border-color: rgba(251, 191, 36, 0.15);
}

html.dark .checkin-rules::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
}

html.dark .checkin-rules-title {
    color: #fbbf24;
}

html.dark .checkin-rules-title i {
    color: #fbbf24;
}

html.dark .checkin-rules-list {
    color: #d4a017;
}

/* --- 奖励项目 --- */
html.dark .task-center-reward-item,
html.dark .reward-item {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
}

html.dark .task-center-reward-item::before,
html.dark .reward-item::before {
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.08), transparent);
}

html.dark .task-center-reward-item:hover,
html.dark .reward-item:hover {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    border-color: rgba(139, 92, 246, 0.3);
}

/* --- 奖励图标 --- */
html.dark .task-center-reward-icon,
html.dark .reward-icon {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
    color: #a78bfa;
}

/* --- 奖励名称 --- */
html.dark .task-center-reward-name,
html.dark .reward-name {
    color: #e5e5e5;
}

/* --- 奖励按钮 --- */
html.dark .task-center-reward-btn,
html.dark .reward-btn {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    border-color: rgba(139, 92, 246, 0.3);
    color: #e5e5e5;
}

html.dark .task-center-reward-btn:hover:not(.completed):not(.disabled),
html.dark .reward-btn:hover:not(.completed):not(.disabled) {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.3) 0%, rgba(139, 92, 246, 0.3) 100%);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.25);
}

html.dark .task-center-reward-btn.completed,
html.dark .reward-btn.completed {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.25) 0%, rgba(5, 150, 105, 0.25) 100%);
    border-color: rgba(16, 185, 129, 0.35);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
}

/* --- 功能链接 --- */
html.dark .task-center-feature-link,
html.dark .feature-link {
    color: #e5e5e5;
}

html.dark .task-center-feature-link:hover,
html.dark .feature-link:hover {
    color: #a78bfa;
}

/* --- 加载骨架屏 --- */
html.dark .loading-skeleton {
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.03) 25%,
        rgba(255, 255, 255, 0.06) 50%,
        rgba(255, 255, 255, 0.03) 75%);
    background-size: 200% 100%;
}

/* --- 底部帮助说明 --- */
html.dark .task-center-footer {
    background: rgba(255, 255, 255, 0.03);
    border-top-color: rgba(255, 255, 255, 0.08);
}

html.dark .help-item {
    color: #a0a0a0;
}

html.dark .help-item i {
    color: #a78bfa;
}

html.dark .contact-support {
    color: #a0a0a0;
    border-top-color: rgba(255, 255, 255, 0.06);
}

html.dark .support-link {
    color: #a78bfa;
}

html.dark .support-link:hover {
    color: #c4b5fd;
    background: rgba(139, 92, 246, 0.15);
}

/* --- 日历文字颜色 --- */
html.dark .task-center-day-number,
html.dark .checkin-day-number {
    color: #e5e5e5;
}

html.dark .task-center-day-label,
html.dark .checkin-day-label {
    color: #a0a0a0;
}

html.dark .task-center-checkin-reward,
html.dark .checkin-reward {
    color: #c0c0c0;
}

/* --- 描述卡片图标 --- */
html.dark .task-center-description-card i,
html.dark .description-card i {
    color: #60a5fa;
}

/* ==================== 响应式设计 ==================== */

/* 移动端适配 - max-width: 640px */
@media (max-width: 640px) {
    .task-center-modal {
        padding: 0;
        align-items: flex-end;
    }

    .task-center-modal-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        max-height: calc(90vh - 60px - env(safe-area-inset-bottom));
        border-radius: 20px 20px 0 0;
        position: fixed;
        bottom: calc(60px + env(safe-area-inset-bottom));
    }

    .task-center-modal-header {
        padding: 1rem 1.25rem;
        border-radius: 20px 20px 0 0;
    }

    .task-center-title {
        font-size: 1.05rem;
    }

    .task-center-subtitle {
        font-size: var(--font-size-xs);
    }

    .task-center-modal-close {
        width: 28px;
        height: 28px;
        min-width: 28px;
        min-height: 28px;
        aspect-ratio: 1;
        font-size: var(--font-size-sm);
    }

    .task-center-tabs {
        gap: 0.5rem;
        padding: 0 1rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .task-center-tab {
        padding: 0.5rem 1rem;
        font-size: 13px;
        flex-shrink: 0;
        min-width: 100px;
        white-space: nowrap;
    }

    .task-center-tab .tab-icon {
        font-size: var(--font-size-sm);
    }

    .task-center-tab .tab-text {
        font-size: 13px;
    }

    .task-center-tab-content {
        padding: 1rem;
    }

    .checkin-calendar {
        gap: 0.25rem;
    }

    .checkin-day {
        padding: 0.4rem 0.2rem;
        border-radius: var(--radius-lg);
        min-height: 45px;
    }

    .checkin-day-number {
        font-size: var(--font-size-xs);
    }

    .checkin-day-label {
        font-size: 8px;
    }

    .checkin-reward {
        font-size: 9px;
    }

    .checkin-button {
        padding: 0.625rem 1.5rem;
        font-size: var(--font-size-sm);
    }

    .reward-item {
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
        min-height: 48px;
    }

    .reward-icon {
        width: 30px;
        height: 30px;
        font-size: var(--font-size-sm);
    }

    .reward-name {
        font-size: var(--font-size-xs);
    }

    .reward-coins {
        font-size: var(--font-size-xs);
    }

    .reward-btn {
        padding: 0.25rem 0.625rem;
        font-size: 10px;
        min-width: 55px;
        height: 26px;
    }
}

/* 超小屏幕进一步优化 - max-width: 360px */
@media (max-width: 360px) {
    .task-center-modal-content {
        max-height: 95vh;
    }

    .task-center-modal-header {
        padding: 0.875rem 1rem;
    }

    .task-center-title {
        font-size: 1rem;
    }

    .task-center-subtitle {
        font-size: 11px;
    }

    .task-center-tabs {
        gap: 0.375rem;
    }

    .task-center-tab {
        padding: 0.375rem 0.75rem;
        font-size: var(--font-size-xs);
        border-radius: var(--radius-lg);
        min-width: 80px;
    }

    .task-center-tab .tab-icon {
        font-size: 12px !important;
    }

    .task-center-tab .tab-text {
        font-size: 11px !important;
    }

    .task-center-tab-content {
        padding: 0.75rem;
    }

    .checkin-calendar {
        gap: 0.2rem;
    }

    .checkin-day {
        padding: 0.35rem 0.15rem;
        min-height: 42px;
    }

    .checkin-day-number {
        font-size: 11px;
    }

    .checkin-day-label {
        font-size: 7px;
    }

    .checkin-reward {
        font-size: 8px;
    }

    .checkin-button {
        padding: 0.5rem 1.25rem;
        font-size: 13px;
    }

    .checkin-rules {
        padding: 0.5rem 0.75rem;
    }

    .checkin-rules-title {
        font-size: 11px;
    }

    .checkin-rules-list {
        font-size: 10px;
    }
}