.time-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.time-period {
    position: relative;
    cursor: pointer;
    text-align: center;
    padding: 12px 8px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    transition: all 0.3s ease;
    background: #fff;
}

.time-period:hover {
    border-color: #4a90e2;
    background: #f8f9ff;
}

.time-period.selected {
    border-color: #4a90e2;
    background: #e8f0fe;
    color: #4a90e2;
}

.time-period .symbol {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 4px;
}

.time-period .time-range {
    font-size: 12px;
    color: #666;
}

/* 隐藏原始的select元素 */
.time-selector-wrapper select {
    display: none;
}