function initClassTimers() {
    const timers = document.querySelectorAll('.js-event-timer');

    timers.forEach(timer => {
        const targetTimeStr = timer.getAttribute('data-target');
        const labelEl = timer.querySelector('.js-timer-label');
        const daysEl = timer.querySelector('.js-days');
        const hoursEl = timer.querySelector('.js-hours');
        const minutesEl = timer.querySelector('.js-minutes');
        const secondsEl = timer.querySelector('.js-seconds');

        // 清除可能存在的旧定时器（防止PJAX导致的叠加）
        if (timer.timerId) clearInterval(timer.timerId);

        function updateTimer() {
            const targetDate = new Date(targetTimeStr).getTime();
            // 简单格式校验，防止 Excerpt 填错导致报错
            if (isNaN(targetDate)) {
                if (labelEl) labelEl.innerText = "日期错误";
                return;
            }

            const now = new Date().getTime();
            const difference = targetDate - now;
            const isPast = difference < 0;
            const absDiff = Math.abs(difference);

            // 更新状态标签
            if (labelEl) {
                labelEl.innerText = isPast ? "已经过去" : "倒计时中";
            }

            // 计算时间
            const d = Math.floor(absDiff / (1000 * 60 * 60 * 24));
            const h = Math.floor((absDiff / (1000 * 60 * 60)) % 24);
            const m = Math.floor((absDiff / 1000 / 60) % 60);
            const s = Math.floor((absDiff / 1000) % 60);

            // 更新数字显示 (加了动画平滑过渡感)
            if (daysEl) daysEl.innerText = d.toString().padStart(2, '0');
            if (hoursEl) hoursEl.innerText = h.toString().padStart(2, '0');
            if (minutesEl) minutesEl.innerText = m.toString().padStart(2, '0');
            if (secondsEl) secondsEl.innerText = s.toString().padStart(2, '0');
        }

        updateTimer();
        timer.timerId = setInterval(updateTimer, 1000);
    });
}

// 首次加载执行
document.addEventListener('DOMContentLoaded', initClassTimers);

// PJAX 兼容执行 (适配 Ghost 常用的主题加载方式)
if (typeof pjax !== 'undefined' || document.querySelector('[data-pjax]')) {
    document.addEventListener('pjax:complete', initClassTimers);
}