// 模拟倒计时功能 function updateTimer() { const secondsElement = document.getElementById('seconds'); const minutesElement = document.getElementById('minutes'); const hoursElement = document.getElementById('hours'); const daysElement = document.getElementById('days'); const yearsElement = document.getElementById('years'); let seconds = parseInt(secondsElement.textContent); let minutes = parseInt(minutesElement.textContent); let hours = parseInt(hoursElement.textContent); let days = parseInt(daysElement.textContent); let years = parseInt(yearsElement.textContent); seconds++; if (seconds >= 60) { seconds = 0; minutes++; if (minutes >= 60) { minutes = 0; hours++; if (hours >= 24) { hours = 0; days++; if (days >= 365) { days = 0; years++; } } } } // 更新显示 secondsElement.textContent = seconds.toString().padStart(2, '0'); minutesElement.textContent = minutes.toString().padStart(2, '0'); hoursElement.textContent = hours.toString().padStart(2, '0'); daysElement.textContent = days; yearsElement.textContent = years; } // 每秒钟更新一次计时器 setInterval(updateTimer, 1000); // 添加按钮点击事件 document.querySelectorAll('.btn').forEach(button => { button.addEventListener('click', function() { this.classList.add('active'); setTimeout(() => { this.classList.remove('active');