/* ── 时钟显示区 ── */
.clock-wrapper {
    text-align: center;
    padding: 2rem 0;
}

.clock-date {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 0.8rem;
    letter-spacing: 0.5px;
}

.clock-time {
    font-family: 'Fira Code', monospace;
    font-size: 4.5rem;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: 2px;
    line-height: 1.2;
}

.clock-zone {
    font-size: 0.9rem;
    color: #999;
    margin-top: 0.6rem;
}

/* ── 关于北京时间 ── */
.about-content {
    max-width: 720px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    padding: 2rem;
    border: 1px solid #e8eaf0;
    line-height: 1.8;
    color: #555;
    font-size: 0.92rem;
}

.about-content p {
    margin-bottom: 1rem;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* ── Mobile ── */
@media (max-width: 640px) {
    .clock-time {
        font-size: 3rem;
    }
}