/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: bold;
}

.logout-btn {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.logout-btn:hover {
    background-color: #c0392b;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    padding: 25px;
    margin-bottom: 30px;
}

.card-title {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

input[type="text"],
textarea,
input[type="file"] {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border 0.3s;
}

input[type="text"]:focus,
textarea:focus {
    border-color: #3498db;
    outline: none;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 按钮样式 */
.btn {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

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

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

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

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.table tr:hover {
    background-color: #f9f9f9;
}

/* 登录页样式 */
.login-container {
    max-width: 400px;
    margin: 100px auto;
}

.login-card {
    text-align: center;
}

.login-title {
    margin-bottom: 30px;
    color: #2c3e50;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .radio-group {
        flex-direction: column;
        gap: 10px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
}