* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --bg-color: #F5F5F5;
    --card-color: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #000000;
    --divider-color: #E5E5E5;
    --active-color: #07C160;
    --expired-color: #FA5151;
    --paused-color: #FF9F0A;
    --draft-color: #8E8E93;
    
    font-size: clamp(0.875rem, 2vw, 1rem); /* 14-16px */
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

/* 顶部导航 */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: clamp(0.75rem, 2vw, 0.9375rem);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.back-btn {
    color: white;
    font-size: clamp(1.5rem, 3vw, 1.75rem);
    background: none;
    border: 0.2rem solid #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: clamp(0.25rem, 0.75vw, 0.3125rem);
    padding: clamp( 0.3rem, 0.75vw, 0.3125rem);
    border-radius: 10%;
    transition: background-color 0.2s;
}

.back-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.header-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    text-align: center;
    flex: 1;
    padding-right: clamp(2.5rem, 6vw, 3rem);
}

/* 主要内容区 */
.container {
    padding: clamp(1rem, 3vw, 1.25rem);
    max-width: 75rem;
    margin: 0 auto;
}

/* 概览卡片 */
.overview-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr));
    gap: clamp(1rem, 3vw, 1.25rem);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
}

.overview-card {
    background: var(--card-color);
    border-radius: 0.75rem;
    padding: clamp(1.25rem, 3vw, 1.5rem);
    box-shadow: 0 0.125rem 0.75rem rgba(0, 0, 0, 0.05);
    border: 0.0625rem solid var(--border-color);
    /* 减小高度 */
    min-height: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.overview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.card-title {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    font-weight: 600;
    color: var(--text-secondary);
}

.card-value {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    text-align: right;
}

/* 交易记录 */
.transactions-section {
    background: var(--card-color);
    border-radius: 0.75rem;
    box-shadow: 0 0.125rem 0.75rem rgba(0, 0, 0, 0.05);
    border: 0.0625rem solid var(--border-color);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
    overflow: hidden;
}

.transactions-header {
    padding: clamp(1.25rem, 3vw, 1.5rem);
    border-bottom: 0.0625rem solid var(--border-color);
    background: #f8f9fa;
}

.section-title {
    font-size: clamp(1rem, 2.5vw, 1.125rem);
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 0.125rem solid var(--primary-color);
}

.transaction-filters {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.filter-btn {
    padding: clamp(0.5rem, 1.5vw, 0.625rem) clamp(1.25rem, 3vw, 1.5rem);
    border: 0.0625rem solid var(--border-color);
    border-radius: 0.5rem;
    font-size: clamp(0.85rem, 2.3vw, 0.9375rem);
    background-color: white;
    color: var(--text-secondary);
    cursor: pointer;
    flex: 1;
    text-align: center;
}

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

.filter-btn.income-btn.active {
    background-color: var(--income-color);
    border-color: var(--income-color);
}

.filter-btn.expense-btn.active {
    background-color: var(--expense-color);
    border-color: var(--expense-color);
}

.transactions-list {
    max-height: 37.5rem;
    overflow-y: auto;
}

.transaction-item {
    padding: 0.2rem clamp(0.2rem, 3vw, 0.5rem);
    border-bottom: 0.0625rem solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.transaction-details {
    flex: 1;
    min-width: 0;
}

.transaction-description {
    font-weight: 600;
    color: var(--text-primary);
    font-size: clamp(1rem, 2.5vw, 1.2rem);
}

.transaction-date {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--text-light);
}

.transaction-amount {
    font-weight: 700;
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    min-width: 7.2rem;
    text-align: right;
}

.amount-income {
    color: var(--income-color);
}

.amount-expense {
    color: var(--expense-color);
}

/* 响应式调整 */
@media (max-width: 48rem) {
    .container {
        padding: clamp(0.75rem, 2vw, 1rem);
    }
    
    .overview-section {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .overview-card {
        padding: clamp(1rem, 2.5vw, 1.25rem);
        /* 在手机上进一步减小卡片高度 */
        min-height: 5rem;
    }
    
    .transaction-filters {
        flex-direction: row;
    }
    
}