/* 动态时钟样式 */
#runtime-clock {
    margin-top: 10px;
    text-align: center;
}

.clock-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.clock-prefix {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-right: 5px;
}

.clock-display {
    display: flex;
    align-items: center;
    gap: 3px;
    justify-content: center;
}

.time-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.time-card {
    position: relative;
    width: 24px;
    height: 30px;
    perspective: 1000px;
    margin: 0 1px;
}

.card-front {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.unit-text {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin: 0 2px;
}



/* 响应式设计 */
@media (max-width: 768px) {
    .clock-prefix {
        font-size: 14px;
    }
    
    .clock-display {
        gap: 2px;
    }
    
    .time-card {
        width: 20px;
        height: 26px;
    }
    
    .card-front,
    .card-back {
        font-size: 10px;
    }
    
    .unit-text {
        font-size: 14px;
        margin: 0 1px;
    }
}

@media (max-width: 480px) {
    .clock-prefix {
        font-size: 12px;
    }
    
    .clock-display {
        gap: 1px;
    }
    
    .time-card {
        width: 18px;
        height: 24px;
    }
    
    .card-front,
    .card-back {
        font-size: 9px;
    }
    
    .unit-text {
        font-size: 12px;
        margin: 0 1px;
    }
}