46分钟在线计时器 - 开始您的精确计时 ```html 46分钟在线计时器 - 开始您的精确计时 body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, f5f7fa 0%, c3cfe2 100%); margin: 0; padding: 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; color: 333; } .container { background-color: white; border-radius: 20px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); padding: 40px; max-width: 600px; width: 100%; text-align: center; } h2 { color: 2c3e50; margin-bottom: 10px; font-size: 2.2rem; } h3 { color: 3498db; margin: 25px 0 15px; font-size: 1.4rem; } .timer-display { font-size: 6rem; font-weight: bold; color: 2c3e50; margin: 30px 0; font-family: 'Courier New', monospace; font-variant-numeric: tabular-nums; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); } .controls { display: flex; justify-content: center; gap: 15px; margin: 30px 0; } button { padding: 12px 25px; font-size: 1rem; border: none; border-radius: 50px; cursor: pointer; transition: all 0.3s ease; font-weight: 600; } startBtn { background-color: 2ecc71; color: white; } startBtn:hover { background-color: 27ae60; } pauseBtn { background-color: f39c12; color: white; } pauseBtn:hover { background-color: e67e22; } resetBtn { background-color: e74c3c; color: white; } resetBtn:hover { background-color: c0392b; } .tip { background-color: f8f9fa; border-left: 5px solid 3498db; padding: 15px; margin: 20px 0; border-radius: 0 8px 8px 0; } .highlight { background-color: ffeb3b; color: 333; padding: 2px 6px; border-radius: 4px; } .progress-bar { height: 8px; background-color: ecf0f1; border-radius: 4px; margin: 20px 0; overflow: hidden; } .progress { height: 100%; background: linear-gradient(90deg, 3498db, 2ecc71); width: 100%; transition: width 1s ease; } @media (max-width: 600px) { .container { padding: 25px; } .timer-display { font-size: 4rem; } .controls { flex-direction: column; align-items: center; } button { width: 80%; } }