* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1 {
    color: #2c3e50;
    margin: 0;
    font-size: 1.8em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header h1 i {
    color: #3498db;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info span {
    color: #666;
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info i {
    color: #3498db;
}

.section {
    background: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    margin: 0;
}

.download-summary {
    background-color: #28a745;
}

.download-summary:hover {
    background-color: #218838;
}

h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.date-group {
    margin-bottom: 20px;
    border: 1px solid #eee;
    border-radius: 4px;
    overflow: hidden;
}

.date-header {
    background-color: #f8f9fa;
    padding: 10px 15px;
    margin: 0;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.date-header h3 {
    margin: 0;
    font-size: 1.1em;
    color: #666;
}

.date-summary {
    display: flex;
    gap: 15px;
    color: #666;
    font-size: 0.9em;
}

.date-summary span {
    background-color: #e9ecef;
    padding: 4px 8px;
    border-radius: 4px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input[type="text"],
input[type="password"],
input[type="file"],
textarea {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

textarea {
    min-height: 150px;
    resize: vertical;
}

button {
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

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

.file-list {
    list-style: none;
}

.file-item {
    padding: 10px 15px;
    border-bottom: 1px solid #eee;
    background-color: white;
}

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

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

.file-link {
    color: #3498db;
    text-decoration: none;
    flex-grow: 1;
}

.file-link:hover {
    color: #2980b9;
}

.delete-button {
    background-color: #e74c3c;
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    margin-left: 10px;
    transition: background-color 0.3s;
}

.delete-button:hover {
    background-color: #c0392b;
}

.menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.menu-item {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.menu-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.menu-icon {
    font-size: 2.5em;
    color: #3498db;
    margin-bottom: 15px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.menu-item:hover .menu-icon {
    background: #3498db;
    color: white;
    transform: scale(1.1);
}

.menu-item h2 {
    color: #2c3e50;
    margin: 15px 0;
    font-size: 1.4em;
}

.menu-item p {
    color: #666;
    font-size: 0.95em;
    line-height: 1.5;
}

.nav-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 25px 0;
    flex-wrap: wrap;
}

.button {
    background-color: #3498db;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.button i {
    font-size: 1.1em;
}

.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background-color: currentColor;
}

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

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

.alert i {
    font-size: 20px;
}

.alert.success i {
    color: #28a745;
}

.alert.error i {
    color: #dc3545;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.login-info {
    margin-top: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.login-info p {
    margin: 5px 0;
    color: #666;
}

.file-info {
    color: #666;
    font-size: 14px;
    margin: 0 10px;
}

.download-options {
    display: flex;
    gap: 15px;
    align-items: center;
}

.date-select {
    display: flex;
    gap: 10px;
    align-items: center;
}

.date-select-input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    min-width: 150px;
}

.download-date {
    background-color: #6c757d;
}

.download-date:hover {
    background-color: #5a6268;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #666;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .user-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .menu {
        grid-template-columns: 1fr;
    }
    
    .nav-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .button {
        justify-content: center;
    }
}

.batch-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.file-checkbox {
    margin-right: 10px;
}

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

#selectAllBtn.active {
    background-color: #2ecc71;
}

#selectAllBtn.active:hover {
    background-color: #27ae60;
}

#batchDeleteBtn:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#batchDeleteBtn:disabled:hover {
    background-color: #95a5a6;
    transform: none;
    box-shadow: none;
}

.category-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-right: 8px;
    color: white;
}

.category-tag.meituan {
    background-color: #FFC300;
}

.category-tag.eleme {
    background-color: #0097FF;
}

/* 分类选择样式 */
select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    color: #333;
    background-color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233498db' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

select:hover {
    border-color: #3498db;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.1);
}

select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

select option {
    padding: 12px;
    font-size: 16px;
}

select option:first-child {
    color: #666;
}

/* 文件上传按钮美化 */
input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 2px dashed #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    color: #666;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="file"]:hover {
    border-color: #3498db;
    background-color: #f0f7ff;
}

input[type="file"]:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 500;
    font-size: 16px;
}

/* 上传按钮样式优化 */
form .button {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: 16px;
    font-weight: 500;
    margin-top: 10px;
    background-color: #3498db;
    transition: all 0.3s ease;
}

form .button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

form .button:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.2);
}

/* 模态弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
    position: relative;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-icon {
    width: 60px;
    height: 60px;
    background-color: #d4edda;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.modal-icon i {
    font-size: 30px;
    color: #28a745;
}

.modal-title {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 500;
}

.modal-message {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.5;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.modal-button {
    padding: 10px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
}

.modal-button.primary {
    background-color: #3498db;
    color: white;
}

.modal-button.primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

.modal-button.secondary {
    background-color: #e9ecef;
    color: #495057;
}

.modal-button.secondary:hover {
    background-color: #dee2e6;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

@keyframes checkmark {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-icon i {
    animation: checkmark 0.5s ease-out forwards;
}