@media (max-width: 900px) {
    .clock-card {
        padding: 30px;
    }
    
    .time-display {
        font-size: 5rem;
    }
    
    .date-display {
        font-size: 1.8rem;
    }
    
    .week-display {
        font-size: 1.5rem;
    }
}

@media (max-width: 600px) {
    .time-display {
        font-size: 3.8rem;
    }
    
    .date-display {
        font-size: 1.5rem;
    }
    
    .week-display {
        font-size: 1.3rem;
        padding: 10px 20px;
    }
    
    .title {
        font-size: 26px;
    }
    .utc-display {
        display: none;
    }
    .timezone {
        display: block;
        font-size: 1rem;
        margin-top: 10px;
    }
    .footer-bar { flex-direction: column; justify-content: center; gap: 10px; }
    .brand-name { font-weight: 500; }
}

/* 移动端强制横屏样式 */
@media screen and (max-width: 932px) and (orientation: portrait) {
    body {
        overflow: hidden;
    }
    .container {
        width: 100vh;
        height: 100vw;
        transform: rotate(90deg);
        transform-origin: center;
        position: fixed;
        top: 50%;
        left: 50%;
        margin-top: -50vw;
        margin-left: -50vh;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .clock-card {
        width: 90vh;
        padding: 20px;
    }
    .title {
        display: none; /* 移动端模拟横屏下隐藏标题 */
    }
    .utc-display {
        display: none; /* 移动端模拟横屏下隐藏UTC实时时间 */
    }
    .timezone {
        display: block;
        font-size: 0.9rem;
        margin-top: 5px;
    }
    .site-footer {
        display: none; /* 旋转模式下隐藏页脚，避免重叠 */
    }
}

/* 横屏模式下的细节优化 */
@media screen and (orientation: landscape) and (max-height: 500px) {
    .clock-card {
        padding: 15px 30px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .title {
        display: none;
    }
    .time-display {
        font-size: clamp(3rem, 15vh, 8rem);
        margin-bottom: 5px;
    }
    .date-display {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    .week-display {
        font-size: 1rem;
        padding: 5px 20px;
        margin-bottom: 10px;
    }
    .utc-display {
        display: none;
    }
    .timezone {
        display: block;
        font-size: 0.8rem;
        margin-top: 5px;
    }
    .footer {
        display: none;
    }
}