/* 全局样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

/* 标签页样式 */
.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: #3498db;
}

.tab-btn.active {
    color: #3498db;
    border-bottom: 3px solid #3498db;
}

.tab-pane {
    display: none;
    padding: 15px 0;
}

.tab-pane.active {
    display: block;
}

/* 输入组样式 */
.input-group {
    margin-bottom: 15px;
}

label {
    display: inline-block;
    margin-right: 10px;
    font-weight: 500;
}

input[type="text"],
input[type="number"],
select,
textarea {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    width: 200px;
}

textarea {
    width: 100%;
    resize: vertical;
}

button {
    padding: 8px 16px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

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

/* 表格样式 */
.table-container {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 10px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

table th {
    background-color: #f2f2f2;
    font-weight: 600;
}

table input {
    width: 100%;
    padding: 6px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.remove-row {
    background-color: #e74c3c;
    padding: 5px 10px;
    font-size: 12px;
}

.remove-row:hover {
    background-color: #c0392b;
}

/* 结果区域样式 */
.results-container {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.plot-container {
    flex: 1;
    min-width: 300px;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    background-color: #fff;
}

#plot-area {
    width: 100%;
    height: 400px;
}

.equation-container {
    flex: 1;
    min-width: 300px;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    background-color: #fff;
}

.equation-container h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

#equation-result {
    font-size: 16px;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 4px;
    min-height: 50px;
}

#stats-result {
    font-size: 14px;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .results-container {
        flex-direction: column;
    }

    .input-group {
        flex-direction: column;
    }

    input[type="text"],
    input[type="number"],
    select {
        width: 100%;
        margin-bottom: 10px;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .tab-btn {
        flex: 1;
        text-align: center;
        padding: 8px;
    }
}