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

html, body {
    height: 100%;
}

body {
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

h3 {
    margin-bottom: 15px;
    color: #444;
    font-size: 16px;
}

h4 {
    margin-bottom: 10px;
    color: #f5f5f5;
    font-size: 16px;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #444;
}

input[type="file"], input[type="text"], select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

input[type="text"], select {
    height: 40px;
}

.checkbox-group {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

button {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #4a6cf7;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #3a5cd7;
}

.secondary-btn {
    background-color: #6c757d;
    padding: 8px 12px;
    font-size: 14px;
    width: auto;
}

.secondary-btn:hover {
    background-color: #5a6268;
}

.status {
    margin-top: 20px;
    padding: 15px;
    border-radius: 4px;
    background-color: #f8f9fa;
    display: none;
}

.status.show {
    display: block;
}

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

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

.file-selection {
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

.file-selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #ddd;
}

.file-selection-header h3 {
    margin-bottom: 0;
}

.file-selection-actions {
    display: flex;
    gap: 10px;
}

.file-list {
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
}

.file-item {
    padding: 8px;
    border-bottom: 1px solid #eee;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-item:last-child {
    border-bottom: none;
}

.file-item label {
    margin-bottom: 0;
    font-weight: normal;
    cursor: pointer;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 页脚样式 */
.footer {
    background-color: gray;
    color: #f5f5f5;
    margin-top: auto;
    padding: 0;
    width: 100%;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 10px;
    padding: 0 15px;
}

.footer-section h4 {
    margin-bottom: 5px;
    font-size: 15px;
}

.footer-section p {
    line-height: 1.4;
    color: #ccc;
    font-size: 13px;
    margin-bottom: 4px;
}

.footer-bottom {
    background-color: rgb(55, 55, 57);
    text-align: center;
    padding: 8px 0;
    font-size: 13px;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .footer-content {
        flex-direction: column;
    }
    
    .footer-section {
        margin-bottom: 20px;
    }
}

@media screen and (max-width: 480px) {
    .main-content {
        padding: 10px;
    }
    
    .container {
        padding: 20px;
    }
    
    .checkbox-group {
        flex-direction: column;
        gap: 10px;
    }
}

.file-tip {
    background-color: #f8f9fa;
    border-left: 4px solid #17a2b8;
    padding: 10px;
    margin-bottom: 15px;
    font-size: 13px;
    color: #555;
    line-height: 1.4;
}

.file-info-note {
    background-color: #fff3cd;
    color: #856404;
    padding: 8px 15px;
    margin: 10px 0;
    border-radius: 4px;
    font-size: 13px;
    border: 1px solid #ffeeba;
}