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

:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #48bb78;
    --warning: #ed8936;
    --danger: #f56565;
    --dark: #2d3748;
    --gray: #718096;
    --light: #edf2f7;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);
    --shadow-glow-pink: 0 0 30px rgba(255, 154, 158, 0.3);
    --shadow-glow-blue: 0 0 30px rgba(161, 196, 253, 0.3);
}

/* 渐变流体背景 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
    background: #1a1a2e;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 154, 158, 0.6) 0%, transparent 40%),
        radial-gradient(circle at 60% 60%, rgba(161, 196, 253, 0.6) 0%, transparent 40%);
    animation: fluidBackground 15s ease-in-out infinite;
    z-index: -2;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    backdrop-filter: blur(2px);
    z-index: -1;
}

@keyframes fluidBackground {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-50px, 50px) scale(1.05);
    }
    75% {
        transform: translate(-30px, -30px) scale(1.08);
    }
}

.container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    color: var(--white);
    margin-bottom: 35px;
    animation: fadeInDown 0.8s ease;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.5), 0 0 20px rgba(255, 255, 255, 0.3);
    }
    to {
        text-shadow: 0 0 20px rgba(255, 255, 255, 0.8), 0 0 30px rgba(255, 255, 255, 0.5);
    }
}

header .subtitle {
    font-size: 1.05rem;
    opacity: 0.95;
}

/* 日期卡片 */
.date-cards {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.date-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 20px 25px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 200px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.date-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.date-card .icon {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.date-card .content {
    display: flex;
    flex-direction: column;
}

.date-card .date {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--dark);
}

.date-card .label {
    font-size: 0.85rem;
    color: var(--gray);
}

/* 大型倒计时卡片 */
.countdown-container {
    text-align: center;
    margin-bottom: 50px !important;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.countdown-big {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 50%, rgba(161, 196, 253, 0.9) 100%);
    border-radius: 20px;
    padding: 50px 20px;
    text-align: center;
    color: white;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    backdrop-filter: blur(20px);
    transition: all 0.4s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.countdown-big:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 50px rgba(102, 126, 234, 0.6);
}

.countdown-big .days {
    font-size: 5.5rem;
    font-weight: bold;
    line-height: 1;
    margin-bottom: 10px;
    text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2);
    animation: countPulse 3s ease-in-out infinite;
}

@keyframes countPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.countdown-big .label {
    font-size: 1.4rem;
    opacity: 0.95;
    font-weight: 500;
}

/* 计划进度卡片 */
.plan-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px;
    margin-top: 20px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.3s both;
}

.plan-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.plan-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.plan-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--dark);
}

.plan-progress {
    width: 100%;
    height: 18px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.plan-progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

.plan-stats {
    display: flex;
    justify-content: space-between;
    font-size: 1rem;
    color: var(--gray);
}

/* 今日任务卡片 */
.today-task-card {
    background: linear-gradient(135deg, rgba(118, 75, 162, 0.9) 0%, rgba(161, 196, 253, 0.9) 100%);
    border-radius: 20px;
    padding: 40px 20px;
    text-align: center;
    color: white;
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    backdrop-filter: blur(20px);
    transition: all 0.4s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.today-task-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 50px rgba(118, 75, 162, 0.6);
}

.today-task-card .number {
    font-size: 4.5rem;
    font-weight: bold;
    line-height: 1;
    margin-bottom: 10px;
    text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2);
    animation: bounce 2s ease-in-out infinite;
}

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

.today-task-card .label {
    font-size: 1.3rem;
    opacity: 0.95;
    margin-bottom: 15px;
    font-weight: 500;
}

.today-task-card .motivation {
    font-size: 1.05rem;
    opacity: 0.9;
    max-width: 400px;
    margin: 0 auto;
    font-style: italic;
}

/* 激励语录 */
.quote-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 25px 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.5s both;
}

.quote-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.quote-section .quote {
    font-size: 1.15rem;
    color: var(--dark);
    font-style: italic;
    text-align: center;
    line-height: 1.6;
    position: relative;
    padding: 0 20px;
}

.quote-section .quote::before,
.quote-section .quote::after {
    content: '"';
    font-size: 3rem;
    color: var(--primary);
    opacity: 0.3;
    position: absolute;
    top: -10px;
}

.quote-section .quote::before {
    left: 0;
}

.quote-section .quote::after {
    right: 0;
}

.quote-section .author {
    text-align: center;
    margin-top: 15px;
    color: var(--gray);
    font-size: 0.9rem;
}

/* 待办清单 */
.task-list-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    margin-bottom: 40px;
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.6s both;
}

.task-list-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.task-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.task-list-header h2 {
    font-size: 1.3rem;
    color: var(--dark);
    font-weight: bold;
    margin: 0;
}

.task-actions {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-weight: 500;
    box-shadow: var(--shadow);
}

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

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

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

.btn-complete:hover {
    background: #38a169;
}

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

.btn-clear:hover {
    background: #4a5568;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-item {
    display: flex;
    align-items: center;
    padding: 18px;
    background: var(--light);
    border-radius: 14px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.task-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

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

.task-item:hover {
    border-color: var(--primary);
    transform: translateX(8px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.2);
}

.task-item.completed {
    background: #f0fff4;
    border-color: var(--success);
    opacity: 0.7;
}

.task-item.completed:hover {
    transform: translateX(8px);
}

.task-checkbox {
    width: 28px;
    height: 28px;
    border: 3px solid var(--gray);
    border-radius: 50%;
    margin-right: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    flex-shrink: 0;
}

.task-item:hover .task-checkbox {
    border-color: var(--primary);
    transform: scale(1.1);
}

.task-item.completed .task-checkbox {
    background: var(--success);
    border-color: var(--success);
    transform: scale(1);
}

.task-checkbox::after {
    content: '✓';
    color: var(--white);
    font-size: 16px;
    opacity: 0;
    transition: all 0.4s ease;
    transform: scale(0);
}

.task-item.completed .task-checkbox::after {
    opacity: 1;
    transform: scale(1);
}

.task-content {
    flex: 1;
}

.task-subject {
    font-weight: bold;
    color: var(--dark);
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.task-number {
    color: var(--primary);
    font-size: 0.95rem;
}

.task-item.completed .task-number {
    color: var(--success);
}

.task-badge {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.task-item:hover .task-badge {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.task-item.completed .task-badge {
    background: var(--success);
    box-shadow: 0 2px 8px rgba(72, 187, 120, 0.3);
}

/* 进度条 */
.progress-section {
    padding: 20px 0;
}

.progress-bar {
    width: 100%;
    height: 16px;
    background: #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 8px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

.progress-text {
    text-align: center;
    margin-top: 12px;
    color: var(--gray);
    font-size: 1rem;
    font-weight: 500;
}

/* 日历部分 */
.calendar-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 40px;
}

.calendar-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.7s both;
}

.calendar-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.calendar-card h3 {
    text-align: center;
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 20px;
    font-weight: bold;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    text-align: center;
}

.calendar-day-header {
    font-weight: bold;
    color: var(--gray);
    font-size: 0.8rem;
    padding: 8px;
}

.calendar-day {
    padding: 10px 5px;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: default;
}

.calendar-day.today {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    font-weight: bold;
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.calendar-day.school-day {
    background: var(--success);
    color: var(--white);
    font-weight: bold;
    box-shadow: 0 0 15px rgba(72, 187, 120, 0.5);
}

.calendar-day.empty {
    background: transparent;
}

.calendar-day:hover:not(.empty) {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

/* 每日作业统计 */
.daily-stats {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 0.8s ease 0.8s both;
}

.daily-stats:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), 0 15px 35px rgba(0, 0, 0, 0.2);
}

.daily-stats h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 20px;
    font-weight: bold;
}

.stats-grid-mini {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    text-align: center;
}

.stat-item {
    padding: 12px 8px;
    background: var(--light);
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--gray);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: scale(1.1);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.stat-item .date {
    font-weight: bold;
    font-size: 0.9rem;
}

.stat-item .count {
    font-size: 0.95rem;
    color: var(--primary);
    font-weight: bold;
}

.stat-item:hover .count {
    color: white;
}

.stat-item.today {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.stat-item.today .count {
    color: white;
}

/* 页脚 */
footer {
    text-align: center;
    color: var(--white);
    margin-top: 40px;
    padding: 25px;
    font-size: 0.95rem;
    opacity: 0.9;
    animation: fadeIn 1s ease 0.9s both;
}

/* 动画定义 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* 响应式设计 - 平板 */
@media (max-width: 768px) {
    body {
        padding: 15px;
        background-attachment: scroll;
    }

    .container {
        padding: 10px;
        max-width: 100%;
    }

    header {
        margin-bottom: 25px;
    }

    header h1 {
        font-size: 1.6rem;
        margin-bottom: 6px;
    }

    header .subtitle {
        font-size: 0.9rem;
    }

    .date-cards {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        margin-bottom: 30px;
    }

    .date-card {
        min-width: 100%;
        max-width: 300px;
        padding: 16px 20px;
    }

    .date-card .icon {
        width: 38px;
        height: 38px;
        font-size: 18px;
    }

    .date-card .date {
        font-size: 1rem;
    }

    .date-card .label {
        font-size: 0.8rem;
    }

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

    .countdown-big {
        padding: 35px 15px;
        border-radius: 16px;
    }

    .countdown-big .days {
        font-size: 4rem;
    }

    .countdown-big .label {
        font-size: 1.2rem;
    }

    .plan-section {
        padding: 20px;
        margin-top: 15px;
        margin-bottom: 30px;
        border-radius: 16px;
    }

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

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

    .plan-progress {
        height: 14px;
        margin-bottom: 10px;
    }

    .plan-stats {
        flex-direction: column;
        gap: 5px;
        font-size: 0.9rem;
    }

    .today-task-card {
        padding: 30px 15px;
        margin-bottom: 30px;
        border-radius: 16px;
    }

    .today-task-card .number {
        font-size: 3.5rem;
    }

    .today-task-card .label {
        font-size: 1.1rem;
    }

    .today-task-card .motivation {
        font-size: 0.95rem;
    }

    .quote-section {
        padding: 20px;
        margin-bottom: 30px;
        border-radius: 16px;
    }

    .quote-section .quote {
        font-size: 1rem;
        padding: 0 10px;
    }

    .quote-section .quote::before,
    .quote-section .quote::after {
        font-size: 2rem;
        top: -5px;
    }

    .quote-section .author {
        font-size: 0.85rem;
        margin-top: 10px;
    }

    .task-list-container {
        padding: 20px;
        margin-bottom: 30px;
        border-radius: 16px;
    }

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

    .task-list-header h2 {
        font-size: 1.1rem;
    }

    .task-actions {
        width: 100%;
        flex-direction: row;
    }

    .btn {
        padding: 12px 15px;
        font-size: 0.9rem;
    }

    .task-item {
        padding: 12px;
    }

    .task-checkbox {
        width: 24px;
        height: 24px;
        margin-right: 12px;
    }

    .task-checkbox::after {
        font-size: 14px;
    }

    .task-subject {
        font-size: 1rem;
    }

    .task-number {
        font-size: 0.85rem;
    }

    .task-badge {
        padding: 4px 10px;
        font-size: 0.8rem;
    }

    .calendar-section {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-bottom: 30px;
    }

    .calendar-card {
        padding: 15px;
        border-radius: 16px;
    }

    .calendar-card h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }

    .calendar-day-header {
        font-size: 0.75rem;
        padding: 6px;
    }

    .calendar-day {
        padding: 8px 4px;
        font-size: 0.85rem;
    }

    .daily-stats {
        padding: 20px;
        margin-bottom: 30px;
        border-radius: 16px;
    }

    .daily-stats h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }

    .stats-grid-mini {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }

    .stat-item {
        padding: 10px 6px;
        font-size: 0.8rem;
    }

    .stat-item .date {
        font-size: 0.85rem;
    }

    .stat-item .count {
        font-size: 0.85rem;
    }

    footer {
        margin-top: 30px;
        padding: 20px;
        font-size: 0.85rem;
    }
}

/* 响应式设计 - 手机 */
@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    header {
        margin-bottom: 20px;
    }

    header h1 {
        font-size: 1.4rem;
    }

    header .subtitle {
        font-size: 0.85rem;
    }

    .date-cards {
        margin-bottom: 25px;
        gap: 10px;
    }

    .date-card {
        padding: 14px 18px;
    }

    .countdown-container {
        margin-bottom: 25px;
    }

    .countdown-big {
        padding: 30px 12px;
    }

    .countdown-big .days {
        font-size: 3.2rem;
    }

    .countdown-big .label {
        font-size: 1.1rem;
    }

    .plan-section {
        padding: 18px;
        margin-bottom: 25px;
    }

    .plan-title {
        font-size: 1rem;
    }

    .today-task-card {
        padding: 25px 12px;
        margin-bottom: 25px;
    }

    .today-task-card .number {
        font-size: 3rem;
    }

    .today-task-card .label {
        font-size: 1rem;
    }

    .today-task-card .motivation {
        font-size: 0.9rem;
    }

    .quote-section {
        padding: 18px;
        margin-bottom: 25px;
    }

    .quote-section .quote {
        font-size: 0.95rem;
    }

    .task-list-container {
        padding: 18px;
        margin-bottom: 25px;
    }

    .task-list-header h2 {
        font-size: 1rem;
    }

    .task-actions {
        flex-direction: column;
        gap: 10px;
    }

    .btn {
        width: 100%;
        padding: 14px;
    }

    .task-item {
        padding: 10px;
    }

    .task-subject {
        font-size: 0.95rem;
    }

    .calendar-card {
        padding: 12px;
    }

    .calendar-card h3 {
        font-size: 1rem;
    }

    .daily-stats {
        padding: 18px;
        margin-bottom: 25px;
    }

    .daily-stats h3 {
        font-size: 1rem;
    }

    .stats-grid-mini {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .stat-item {
        padding: 8px 5px;
        font-size: 0.75rem;
    }

    footer {
        margin-top: 25px;
        padding: 15px;
        font-size: 0.8rem;
    }
}

/* 小屏手机优化 */
@media (max-width: 360px) {
    header h1 {
        font-size: 1.2rem;
    }

    .countdown-big .days {
        font-size: 2.8rem;
    }

    .today-task-card .number {
        font-size: 2.5rem;
    }

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

    .date-card {
        padding: 12px 15px;
    }
}

/* 横屏模式优化 */
@media (max-height: 600px) and (orientation: landscape) {
    .countdown-big {
        padding: 25px 15px;
    }

    .countdown-big .days {
        font-size: 2.5rem;
    }

    .today-task-card {
        padding: 20px 15px;
    }

    .today-task-card .number {
        font-size: 2.5rem;
    }

    body {
        padding: 10px;
    }

    .container {
        max-width: 100%;
    }
}

/* 移动设备专用样式 */
body.mobile .task-item:hover {
    transform: none;
}

body.mobile .stat-item:hover {
    transform: none;
}

body.mobile .date-card:hover {
    transform: none;
}

body.mobile .calendar-card:hover {
    transform: none;
}

body.mobile .plan-section:hover {
    transform: none;
}

body.mobile .task-list-container:hover {
    transform: none;
}

body.mobile .quote-section:hover {
    transform: none;
}

body.mobile .daily-stats:hover {
    transform: none;
}

/* 触摸设备激活状态 */
body.touch .task-item.touch-active {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.02);
}

body.touch .stat-item.touch-active {
    transform: scale(1.05);
}

body.touch .date-card.touch-active {
    transform: translateY(-5px) scale(1.02);
}

/* 移动端禁用悬停动画延迟 */
body.mobile .task-item,
body.mobile .stat-item,
body.mobile .date-card,
body.mobile .calendar-card {
    transition: transform 0.2s ease;
}

/* 移动端优化按钮点击效果 */
body.mobile .btn {
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

body.mobile .btn:active {
    transform: scale(0.95);
}

/* 移动端优化任务点击 */
body.mobile .task-checkbox {
    -webkit-tap-highlight-color: transparent;
}

/* 移动端优化进度条动画 */
body.mobile .progress-fill {
    transition: width 0.3s ease;
}

body.mobile .plan-progress-fill {
    transition: width 0.3s ease;
}

/* 移动端禁用不必要的动画 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* iOS Safari 特定优化 */
@supports (-webkit-touch-callout: none) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    .task-item,
    .btn,
    .task-checkbox {
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }
}