/* 基本样式重置 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

/* 容器 */
.container {
    max-width: 1000px;
    margin: 0 auto;
}

/* 页眉 */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

header p {
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-bottom: 20px;
}

/* 导航 */
nav {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

nav a {
    text-decoration: none;
    color: #3498db;
    margin: 0 15px;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

nav a:hover {
    background-color: #3498db;
    color: #fff;
}

nav a.active {
    background-color: #3498db;
    color: #fff;
}

/* 卡片 */
.card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 25px;
    margin-bottom: 25px;
}

/* 标题 */
h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    border-bottom: 1px solid #ecf0f1;
    padding-bottom: 10px;
}

h3 {
    color: #3498db;
    margin: 20px 0 10px;
}

/* 输入区域 */
.input-group {
    position: relative;
    margin-bottom: 20px;
}

textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    resize: none;
    font-size: 1rem;
    font-family: inherit;
}

textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.char-counter {
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: 0.8rem;
    color: #7f8c8d;
}

/* 设置区域 */
.settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.setting-group {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

select, input[type="range"] {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #fff;
}

select:focus {
    outline: none;
    border-color: #3498db;
}

/* 按钮 */
.actions {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.primary-button {
    background-color: #3498db;
    color: #fff;
}

.primary-button:hover {
    background-color: #2980b9;
}

.secondary-button {
    background-color: #ecf0f1;
    color: #2c3e50;
    margin: 0 5px;
}

.secondary-button:hover {
    background-color: #bdc3c7;
}

/* 音频播放器 */
.audio-player {
    display: flex;
    flex-direction: column;
    align-items: center;
}

audio {
    width: 100%;
    margin-bottom: 15px;
}

.audio-controls {
    display: flex;
    justify-content: center;
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: bold;
}

/* 代码 */
code, pre {
    font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    background-color: #f8f9fa;
    border-radius: 3px;
    padding: 2px 5px;
    font-size: 0.9rem;
}

pre {
    padding: 15px;
    overflow-x: auto;
    margin: 15px 0;
}

pre code {
    padding: 0;
    background-color: transparent;
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9rem;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .settings {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 15px;
    }
}