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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 标题样式 */
h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 2.5em;
}

h2 {
    color: #34495e;
    margin-bottom: 20px;
    font-size: 1.8em;
}

h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.4em;
}

/* 表单容器 */
.form-container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

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

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

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

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

/* 按钮样式 */
.btn {
    background: #3498db;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
}

.btn-small {
    padding: 6px 12px;
    font-size: 14px;
    margin-right: 5px;
}

/* 信息显示 */
.info {
    background: #ecf0f1;
    padding: 15px;
    border-radius: 5px;
    margin-top: 20px;
}

.info ul {
    margin-left: 20px;
}

.info li {
    margin-bottom: 5px;
}

/* 字节数显示 */
.byte-info {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

.byte-info .error {
    color: #e74c3c;
    font-weight: bold;
}

.file-info {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

/* 消息样式 */
.success {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
}

/* 订单信息 */
.order-info {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 4px solid #3498db;
}

.order-info p {
    margin: 5px 0;
}

/* 返回链接 */
.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: #3498db;
    text-decoration: none;
}

.back-link a:hover {
    text-decoration: underline;
}

/* 管理员头部 */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #ecf0f1;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logout-btn {
    background: #e74c3c;
    color: white;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
}

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

.back-btn {
    background: #95a5a6;
    color: white;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
}

.back-btn:hover {
    background: #7f8c8d;
}

.download-btn {
    background: #27ae60;
    color: white;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
}

.download-btn:hover {
    background: #229954;
}

/* 统计卡片 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    color: #3498db;
    margin: 10px 0;
}

/* 管理操作卡片 */
.admin-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.action-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.action-card p {
    color: #666;
    margin-bottom: 20px;
}

/* 表格样式 */
.table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

.data-table th {
    background: #34495e;
    color: white;
    font-weight: bold;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.data-table .no-data {
    text-align: center;
    color: #666;
    font-style: italic;
    padding: 30px;
}

/* 状态标签 */
.status {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.status-available {
    background: #d4edda;
    color: #155724;
}

.status-full {
    background: #f8d7da;
    color: #721c24;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .form-container {
        padding: 20px;
    }
    
    .admin-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .admin-actions {
        grid-template-columns: 1fr;
    }
    
    .data-table {
        font-size: 14px;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 10px;
    }
}