body {
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f6f9;
    color: #333;
}

.container {
    max-width: 1280px;
    margin: auto;
    background-color: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
    font-size: 28px;
}

h2 {
    color: #34495e;
    font-size: 20px;
    margin: 0;
    display: flex;
    align-items: baseline;
    gap: 10px;
}

h3 {
    font-size: 16px;
    color: #555;
    margin-top: 0;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

/* 颜色定义 */
.strategy-color { color: #d9534f; font-weight: bold; }
.benchmark-color { color: #5cb85c; font-weight: bold; }
.excess-color { color: #007bff; font-weight: bold; }
.drawdown-color { color: #28a745; font-weight: bold; } /* 回撤通常用绿色表示安全/跌幅 */

/* 顶部概览卡片 */
.summary-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    flex: 1;
    min-width: 240px; /* 卡片最小宽度 */
    max-width: calc(25% - 15px); /* 4列布局，考虑gap */
    background-color: #fff;
    border: 1px solid #eaeaea;
    border-radius: 10px;
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.card .period-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0 0 5px 0;
}

.card .date-range {
    font-size: 12px;
    color: #999;
    margin: 0 0 15px 0;
}

.card_small {
    background-color: #fff;
    border: 1px solid #eaeaea;
    border-radius: 10px;
    padding: 20px;
    max-width: 140px;   /* 限制整体宽度，比默认 card 更窄 */
}

.card_small:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.card_small .period-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0 0 5px 0;
}

.card_small .date-range {
    font-size: 12px;
    color: #999;
    margin: 0 0 15px 0;
}

.metric-row {
    display: flex;
    justify-content: space-between;
}

.metric-item {
    text-align: center;
    flex: 1;
}

.metric-item .label {
    font-size: 12px;
    color: #888;
    margin: 0 0 4px 0;
}

.metric-item .value {
    font-size: 16px;
    margin: 0;
}

/* 图表区域 */
.chart-section {
    border: 1px solid #eaeaea;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    background: #fff;
}

#chart-container {
    width: 100%;
    height: 600px;
}

/* 详细指标区域 */
.indicators-section {
    background-color: #fff;
    border-radius: 10px;
    /* padding: 20px; */ /* 容器已有padding */
}

.indicators-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.date-range-header {
    font-size: 14px;
    font-weight: normal;
    color: #888;
}

.period-buttons {
    display: flex;
    background-color: #f1f3f5;
    border-radius: 8px;
    padding: 4px;
}

.period-btn {
    background-color: transparent;
    border: none;
    padding: 6px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    color: #666;
    font-weight: 500;
    transition: all 0.2s;
}

.period-btn:hover {
    color: #333;
}

.period-btn.active {
    background-color: #fff;
    color: #007bff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.indicators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.indicators-grid-no-benchmark {
    display: grid;
    gap: 30px;
}

.indicator-column {
    background: #fcfcfc;
    border-radius: 10px;
    padding: 20px;
    border: 1px solid #f0f0f0;
}

.indicator-column.strategy-column { border-top: 4px solid #d9534f; }
.indicator-column.benchmark-column { border-top: 4px solid #5cb85c; }
.indicator-column.excess-column { border-top: 4px solid #007bff; }

.indicator-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px dashed #eee;
}

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

/* 两行三列的Grid布局 */
.indicator-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);  /* 三列 */
    grid-template-rows: repeat(2, auto);    /* 两行 */
    gap: 15px;  /* 卡片间距 */
}

/* 响应式设计 */
@media (max-width: 992px) {
    .indicator-grid {
        grid-template-columns: repeat(2, 1fr);  /* 平板：两列 */
        grid-template-rows: repeat(3, auto);    /* 三行 */
    }
}

@media (max-width: 576px) {
    .indicator-grid {
        grid-template-columns: 1fr;  /* 手机：单列 */
        grid-template-rows: repeat(6, auto);    /* 六行 */
    }
}
.metric-title {
    margin: 0;
    color: #666;
    font-size: 14px;
}

.metric-value {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

/* 响应式调整 */
@media (max-width: 900px) {
    .indicators-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .indicators-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .period-buttons {
        width: 100%;
        overflow-x: auto;
    }
    
    .period-btn {
        white-space: nowrap;
    }
}