* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'SimSun', '宋体', serif;
}

body {
    font-family: 'SimSun', '宋体', serif;
    background: #f5f5f5;
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 400;
    color: #222;
    letter-spacing: 2px;
}

.subtitle {
    text-align: center;
    font-size: 12px;
    color: #999;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 1px;
}

.status {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid #e0e0e0;
}

.status p {
    font-size: 14px;
    line-height: 1.6;
    color: #666;
}

.start-btn, .stop-btn {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    margin-bottom: 12px;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.start-btn {
    background: #000;
    color: white;
}

.start-btn:hover {
    background: #222;
}

.start-btn:active {
    transform: scale(0.98);
}

.stop-btn {
    background: #fff;
    color: #000;
    border: 2px solid #000;
}

.stop-btn:hover {
    background: #f5f5f5;
}

.stop-btn:active {
    transform: scale(0.98);
}

.info-panel {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

.info-item {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid #e0e0e0;
}

.info-item h3 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.values {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: #333;
}

.values span {
    flex: 1;
    text-align: center;
}

.chart-container {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid #e0e0e0;
    margin-bottom: 20px;
}

.chart-container h3 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#chart {
    width: 100%;
    height: 300px;
    background: #fafafa;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

/* 录音控制区域 */
.recording-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #e0e0e0;
}

.recording-section h2 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.recording-section .start-btn {
    background: #fff;
    color: #000;
    border: 2px solid #000;
}

.recording-section .start-btn:hover {
    background: #000;
    color: #fff;
}

.recording-section .stop-btn {
    background: #000;
    color: #fff;
    border: none;
}