/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    padding: 30px;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    padding: 40px;
}

h1, h2 {
    color: #333;
    margin-bottom: 20px;
    text-align: center;
}

h1 {
    font-size: 28px;
    margin-bottom: 30px;
}

h2 {
    font-size: 24px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: bold;
}

input[type="text"],
input[type="password"],
input[type="date"],
input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

/* 按钮样式 */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-warning {
    background: #ffc107;
    color: #333;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-info:hover {
    background: #138496;
}

.btn-full {
    width: 100%;
}

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

table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

table tbody tr:hover {
    background-color: #f5f5f5;
}

/* 导航栏 */
.nav-bar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-bar a {
    color: white;
    text-decoration: none;
    margin-right: 20px;
    font-weight: bold;
}

.nav-bar a:hover {
    text-decoration: underline;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 消息提示 */
.message {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    display: none;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.show {
    display: block;
}

/* 操作按钮组 */
.action-buttons {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
}

/* 统计卡片 */
.stats-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
}

.stats-card h3 {
    font-size: 32px;
    margin-bottom: 10px;
}

.stats-card p {
    font-size: 16px;
}

/* 链接样式 */
.text-center {
    text-align: center;
    margin-top: 15px;
}

.text-center a {
    color: #667eea;
    text-decoration: none;
}

.text-center a:hover {
    text-decoration: underline;
}

/* 复选框 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    table {
        font-size: 12px;
    }
    
    .btn {
        padding: 8px 15px;
        font-size: 12px;
    }
    
    .nav-bar {
        flex-direction: column;
        gap: 10px;
    }
}