/* 倒计时样式 */
        #countdown {
            position: absolute;
            top: 120px;
            right: 30px;
            background: red;
            color: white;
            padding: 15px 20px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(200, 16, 46, 0.4);
            z-index: 9999;
            cursor: pointer;
            animation: float 3s ease-in-out infinite;
            transition: transform 0.3s ease;
        }

/* 添加半透明背景图片 */
#countdown::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/logowhite.png') center/40% no-repeat;
    opacity: 0.3; /* 设置图片透明度为30% */
    z-index: 0; /* 置于内容下方 */
}
        
        #countdown:hover {
            transform: scale(1.03);
        }
        
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-8px); }
            100% { transform: translateY(0px); }
        }
        
        .school-name {
            font-size: 16px;
            font-weight: bold;
            text-align: center;
            line-height: 1.4;
            margin-bottom: 3px;
        }
        
        .countdown-timer {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            font-weight: bold;
            margin-top: 5px;
        }
        
        .countdown-number {
            color: #FFD700; /* 黄色文字 */
            margin: 0 8px; /* 左右间距 */
            transition: all 0.5s ease;
        }
        
        /* 倒计时结束样式 */
        .countdown-ended {
            background-color: rgba(25, 135, 84, 0.9) !important;
            background-image: none !important;
        }
        
        .countdown-ended .countdown-number {
            color: white;
        }