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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

/* H5页面容器样式 */
.container {
    max-width: 414px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
}

/* 管理后台页面容器样式 */
body.admin-page .container {
    max-width: none;
    margin: 0;
    background: #f5f5f5;
}

/* 状态徽章样式 */
.status-badge {
    padding: 4px 8px;
    border-radius: 4px 0 0 0;
    font-size: 12px;
    font-weight: bold;
}

.status-badge.active {
    background-color: #27ae60;
    color: white;
}

.status-badge.inactive {
    background-color: #95a5a6;
    color: white;
}

/* 表单文本域样式 */
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    resize: vertical;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

/* 简洁提示弹窗 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 12px;
    padding: 24px 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    z-index: 2000;
    min-width: 280px;
    max-width: 90vw;
    text-align: center;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.toast-icon {
    font-size: 48px;
    margin-bottom: 16px;
    line-height: 1;
}

.toast-message {
    font-size: 16px;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.4;
}

.toast-button {
    background: #FF6B35;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    min-width: 80px;
}

.toast-button:hover {
    background: #e55a2b;
}

.toast.success .toast-icon {
    color: #27ae60;
}

.toast.error .toast-icon {
    color: #e74c3c;
}

.toast.warning .toast-icon {
    color: #f39c12;
}

.toast.info .toast-icon {
    color: #3498db;
}

/* 简洁确认弹窗 */
.confirm-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    z-index: 2000;
    min-width: 300px;
    max-width: 90vw;
    text-align: center;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.confirm-toast.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.confirm-toast .toast-icon {
    font-size: 48px;
    margin-bottom: 16px;
    line-height: 1;
    color: #f39c12;
}

.confirm-toast .toast-message {
    font-size: 16px;
    color: #333;
    margin-bottom: 24px;
    line-height: 1.4;
}

.confirm-toast .toast-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.confirm-toast .toast-button {
    background: #FF6B35;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    min-width: 80px;
}

.confirm-toast .toast-button.secondary {
    background: #95a5a6;
}

.confirm-toast .toast-button:hover {
    background: #e55a2b;
}

.confirm-toast .toast-button.secondary:hover {
    background: #7f8c8d;
}

/* 遮罩层 */
.toast-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1999;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast-overlay.show {
    opacity: 1;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    margin: 20px;
    max-width: 480px;
    width: 100%;
    max-height: 85vh;
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
    transform: scale(0.9);
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-body {
    padding: 0 20px 20px 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-header {
    padding: 20px 20px 0 20px;
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
}

/* 弹窗头部操作区域 */
.modal-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 导出按钮样式 */
.export-btn {
    padding: 8px 16px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.export-btn:hover {
    background: #218838;
    transform: translateY(-1px);
}

.export-btn i {
    font-size: 12px;
}

.modal.show .modal-content {
    transform: scale(1);
}



.modal-header h2,
.modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.close {
    font-size: 24px;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s;
}

.close:hover {
    color: #666;
}

/* 用户信息显示样式 */
#userInfoDisplay {
    margin-bottom: 30px;
}

.user-info-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
}

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

.user-info-item label {
    font-weight: 500;
    color: #666;
    width: 80px;
    margin: 0;
    flex-shrink: 0;
}

.user-info-item span {
    color: #333;
    font-weight: 400;
}

/* 表单操作按钮 */
.form-actions,
.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #eee;
}

.form-actions button,
.modal-actions button {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.form-actions button[type="button"]:first-child {
    background: #f8f8f8;
    color: #666;
}

.form-actions button[type="button"]:first-child:hover {
    background: #e8e8e8;
}

.form-actions button#confirmRegisterBtn {
    background: #FF6B35;
    color: white;
}

.form-actions button#confirmRegisterBtn:hover {
    background: #E55A2B;
    transform: translateY(-1px);
}

.form-actions button#confirmRegisterBtn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.header {
    background: #f8f9fa;
    color: #333;
    padding: 8px 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #e0e0e0;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.header h1 {
    font-size: 20px;
    font-weight: 600;
}

.user-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 8px 12px;
    border-radius: 16px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.search-box {
    position: relative;
}

.search-box {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 8px 40px 8px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    font-size: 14px;
    background: white;
    color: #333;
    outline: none;
}

.search-icon {
    position: absolute;
    right: 16px;
    color: #999;
    font-size: 16px;
    pointer-events: none;
}

.search-input::placeholder {
    color: #999;
}

.filter-bar {
    background: white;
    padding: 12px 16px;
    border-bottom: 1px solid #eee;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.filter-bar::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.van-tab {
    position: relative;
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 0 12px;
    color: #646566;
    font-size: 14px;
    line-height: 20px;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.3s;
}

.van-tab--active {
    color: rgb(75, 188, 141);
    font-weight: 700;
    font-size: 16px;
}

.van-tab--active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: linear-gradient(90deg, rgba(75, 188, 141, 0.3) 0%, rgb(75, 188, 141) 50%, rgba(75, 188, 141, 0.3) 100%);
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(75, 188, 141, 0.3);
}

.van-tab__text {
    display: inline-block;
}

.content {
    padding: 16px;
}

/* 课程详情页样式 */
.course-detail-container {
    min-height: 100vh;
    background: #f5f5f5;
    padding-bottom: 60px;
}

.course-hero-section {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #FF6B6B, #4ECDC4);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.course-hero-section .back-btn {
    position: absolute;
    top: 20px;
    left: 16px;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 20px;
    font-size: 18px;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.course-info-card {
    background: white;
    margin: -30px 16px 0;
    border-radius: 16px;
    padding: 24px;
    padding-bottom: 84px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    position: relative;
    z-index: 5;
}

.course-header {
    margin-bottom: 24px;
}

.course-type {
    background: #E8F4FD;
    color: #1976D2;
    padding: 4px 8px;
    border-radius: 4px 0 0 0;
    font-size: 12px;
}

.enrollment-card {
    background: linear-gradient(135deg, #FF8A65, #FF7043);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    position: relative;
}

.enrollment-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    padding: 8px 0;
}

.enrollment-icon {
    font-size: 18px;
    color: white;
}

.enrollment-title {
    font-weight: 600;
    color: white;
    font-size: 16px;
}

.enrollment-content {
    background: white;
    border-radius: 12px;
    padding: 20px;
}

.enrollment-dates {
    display: flex;
    align-items: center;
    gap: 20px;
    justify-content: space-between;
}

.date-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.date-label {
    display: none;
}

.date-value {
    font-size: 18px;
    font-weight: 700;
    color: #E65100;
    margin-bottom: 4px;
    white-space: nowrap;
}

.date-year {
    font-size: 12px;
    color: #999;
    white-space: nowrap;
}

.date-separator {
    color: #999;
    font-size: 14px;
}

.course-details {
    margin-bottom: 24px;
}

.detail-section {
    margin-bottom: 16px;
    padding: 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background: #fafafa;
}

.detail-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin: 0 0 8px 0;
}

.section-content {
    font-size: 14px;
    color: #666;
    margin: 0;
    line-height: 1.5;
}

.course-tabs {
    margin-top: 24px;
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: 16px;
}

.tab-btn {
    flex: 1;
    padding: 12px 8px;
    border: none;
    background: none;
    font-size: 14px;
    color: #666;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: #4CAF50;
    border-bottom-color: #4CAF50;
    font-weight: 600;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.course-description {
    font-size: 14px;
    line-height: 1.6;
    color: #666;
}

.course-description p {
    margin: 0 0 12px 0;
}

.bottom-action {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    height: 50px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.register-btn-active {
    width: 100%;
    padding: 16px;
    background: #FF6B35;
    color: white;
    border: none;
    border-radius: 0;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}



.register-btn-disabled {
    width: 100%;
    padding: 16px;
    background: #CCCCCC;
    color: #666666;
    border: none;
    border-radius: 0;
    font-size: 16px;
    font-weight: 600;
    cursor: not-allowed;
    opacity: 0.7;
}

.register-btn-pending {
    width: 100%;
    padding: 16px;
    background: #FFA500;
    color: white;
    border: none;
    border-radius: 0;
    font-size: 16px;
    font-weight: 600;
    cursor: not-allowed;
}

.register-btn-ended {
    width: 100%;
    padding: 16px;
    background: #DC3545;
    color: white;
    border: none;
    border-radius: 0;
    font-size: 16px;
    font-weight: 600;
    cursor: not-allowed;
}

.register-btn-full {
    width: 100%;
    padding: 16px;
    background: #6C757D;
    color: white;
    border: none;
    border-radius: 0;
    font-size: 16px;
    font-weight: 600;
    cursor: not-allowed;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .course-info-card {
        margin: -30px 12px 0;
        padding: 20px;
        margin-bottom: 80px;
    }
    
    .course-hero-section {
        height: 180px;
    }
    
    .enrollment-dates {
        flex-direction: row;
        gap: 8px;
        justify-content: space-between;
        align-items: center;
    }
    
    .date-separator {
        text-align: center;
        margin: 4px 0;
    }
    
    .tab-btn {
        font-size: 13px;
        padding: 10px 6px;
    }
    
    .course-description {
        font-size: 13px;
    }
    
    .detail-section {
        margin-bottom: 12px;
        padding-bottom: 12px;
    }
}

@media (max-width: 480px) {
    .course-info-card {
        margin: -30px 8px 0;
        padding: 16px;
    }
    
    .course-title {
        font-size: 18px;
    }
    
    .enrollment-card {
        padding: 12px;
    }
    
    .date-value {
        font-size: 14px;
    }
}

.course-card {
    background: white;
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.box-1 {
    display: flex;
    align-items: flex-start;
    padding: 12px;
    height: 120px;
}

.box-1 .content {
    align-self: flex-start;
}

.cover {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    position: relative;
    flex-shrink: 0;
    margin-right: 12px;
    overflow: hidden;
}

.cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    background: linear-gradient(45deg, #4ECDC4, #44A08D);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.cover .placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #4ECDC4, #44A08D);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    border-radius: 8px;
}

.course-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.course-tag {
    position: absolute;
    top: 0;
    left: 0;
    background: #FF4444;
    color: white;
    padding: 0px 6px;
    border-radius: 4px 0 0 0;
    font-size: 10px;
    font-weight: 500;
}

.age {
    position: absolute;
    bottom: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 4px;
    padding: 0;
    display: flex;
    align-items: center;
    font-size: 10px;
}

.age .tip {
    background: #FF8C00;
    color: white;
    padding: 1px 4px;
    border-radius: 0;
}

.age .txt {
    color: #333;
    font-weight: 500;
    background: rgba(128, 128, 128, 0.3);
    padding: 1px 4px;
    border-radius: 0;
}

.content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    margin-top: 0;
    color: #333;
    line-height: 1.4;
}

.course-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 12px;
    color: #666;
    flex-wrap: wrap;
}

.course-enrollment {
    color: #666;
}

.content {
    flex: 1;
    padding-right: 8px;
    margin-top: -4px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 96px;
}

.course-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.line-1 {
    margin-bottom: 4px;
}

.number {
    font-size: 12px;
    color: #FF6B6B;
    font-weight: 600;
}

.line-2 {
    margin-bottom: 0;
}

.line-2 .item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.t-box {
    display: block;
    margin-bottom: 8px;
}

.t-box .item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.teacher-icon {
    font-size: 12px;
    display: inline-block;
    margin-right: 4px;
}

.t-box .name {
    font-size: 12px;
    color: #666;
}

.line-2 .name {
    font-size: 12px;
    color: #666;
}

.btn {
    background: #ccc;
    color: #666;
    border: none;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    cursor: not-allowed;
    transition: all 0.3s ease;
    display: inline-block;
    margin-top: 50px;
}

.btn.off {
    background: #e0e0e0;
    color: #999;
    cursor: not-allowed;
}

.btn.active {
    background: #4CAF50;
    color: white;
    cursor: pointer;
}

.btn.active:hover {
    background: #45a049;
    transform: translateY(-1px);
}

.box-2 {
    padding: 12px;
    border-top: 1px solid #eee;
}

.time-1, .time-2 {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
    font-size: 12px;
    color: #666;
}

.time-1:last-child, .time-2:last-child {
    margin-bottom: 0;
}

.time-1 img, .time-2 img {
    width: 16px;
    height: 16px;
    margin-right: 6px;
}

.p1 {
    color: #666;
    font-size: 12px;
}

.p2 {
    color: #333;
    font-weight: 500;
    font-size: 12px;
}

.p3 {
    color: #666;
    font-size: 12px;
}

.p {
    color: #666;
    font-size: 12px;
}

.limit-info {
    font-size: 12px !important;
}

.age-limit, .gender-limit {
    font-size: 12px;
}

.icon {
    display: inline-block;
    width: 16px;
    font-size: 12px;
    color: #666;
    margin-right: 8px;
    text-align: center;
}

.status-available {
    color: #34C759;
}

.status-full {
    background: #FFE8E8;
    color: #FF3B30;
}

.register-btn {
    background: #007AFF;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.register-btn:hover {
    background: #0056CC;
}

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

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state img {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #ddd;
    border-top: 2px solid #007AFF;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    background: #007AFF;
    border-radius: 50%;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,122,255,0.3);
    transition: all 0.3s;
    z-index: 1000;
}

.fab:hover {
    transform: scale(1.1);
}

@media (max-width: 480px) {
    .container {
        max-width: 100%;
    }
}

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

/* Admin Page Styles */
.admin-page .login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.admin-page .login-box {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.admin-page .login-title {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
}

.admin-page .form-group {
    margin-bottom: 20px;
    text-align: left;
}

.admin-page .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.admin-page .form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.admin-page .form-group input:focus {
    outline: none;
    border-color: #007AFF;
    box-shadow: 0 0 0 3px rgba(0,122,255,0.1);
}

.admin-page .login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.admin-page .login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0,122,255,0.3);
}

.admin-page .login-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.back-link {
    display: inline-block;
    margin: 20px;
    padding: 8px 16px;
    background: #f8f8f8;
    color: #666;
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s;
}

.back-link:hover {
    background: #e8e8e8;
}

.admin-page .admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background: #f5f5f5;
    min-height: 100vh;
}

.admin-page .admin-header {
    background: white;
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-page .admin-title {
    font-size: 28px;
    color: #333;
    font-weight: 600;
}

.admin-page .logout-btn {
    padding: 10px 20px;
    background: #FF3B30;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.admin-page .logout-btn:hover {
    background: #D70015;
    transform: translateY(-1px);
}

.admin-page .admin-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.admin-page .section {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.admin-page .section-header {
    padding: 20px 30px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
}

.admin-page .section-title {
    font-size: 20px;
    font-weight: 600;
    color: #333;
}

.admin-page .add-btn {
    padding: 10px 20px;
    background: #007AFF;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.admin-page .add-btn:hover {
    background: #0056CC;
    transform: translateY(-1px);
}

.admin-page .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.admin-page .stat-card {
    background: white;
    padding: 30px 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.admin-page .stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.admin-page .stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #007AFF;
    margin-bottom: 8px;
}

.admin-page .stat-label {
    color: #666;
    font-size: 16px;
    font-weight: 500;
}

.admin-page .table-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

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

.admin-page .table th,
.admin-page .table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.admin-page .table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.admin-page .table td {
    font-size: 14px;
    color: #555;
}

.admin-page .action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    margin-right: 8px;
    transition: all 0.3s;
    font-weight: 500;
}

.admin-page .action-btn.edit {
    background: #007AFF;
    color: white;
}

.admin-page .action-btn.edit:hover {
    background: #0056CC;
    transform: translateY(-1px);
}

.admin-page .action-btn.delete {
    background: #FF3B30;
    color: white;
}

.admin-page .action-btn.delete:hover {
    background: #D70015;
    transform: translateY(-1px);
}

.btn {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    margin-right: 5px;
    transition: all 0.3s;
}

.btn-edit {
    background: #007AFF;
    color: white;
}

.btn-edit:hover {
    background: #0056CC;
}

.btn-delete {
    background: #FF3B30;
    color: white;
}

.btn-delete:hover {
    background: #D70015;
}

.admin-page .modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.admin-page .modal.show {
    display: flex;
}

.admin-page .modal-content {
    background: white;
    border-radius: 16px;
    padding: 30px;
    margin: 20px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    transform: scale(0.9);
    transition: transform 0.3s;
}

.admin-page .modal.show .modal-content {
    transform: scale(1);
}

.admin-page .modal-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
    color: #333;
}

.admin-page .modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.admin-page .modal-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.admin-page .modal-btn.cancel {
    background: #f8f8f8;
    color: #666;
}

.admin-page .modal-btn.cancel:hover {
    background: #e8e8e8;
}

.admin-page .modal-btn.confirm {
    background: #007AFF;
    color: white;
}

.admin-page .modal-btn.confirm:hover {
    background: #0056CC;
    transform: translateY(-1px);
}

.modal-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
    transition: all 0.3s;
}

.modal-btn-primary {
    background: #007AFF;
    color: white;
}

.modal-btn-primary:hover {
    background: #0056CC;
}

.modal-btn-secondary {
    background: #f8f8f8;
    color: #666;
}

.modal-btn-secondary:hover {
    background: #e8e8e8;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row .form-group {
    flex: 1;
}

.error-message {
    color: #FF3B30;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.success-message {
    color: #34C759;
    font-size: 14px;
    margin-top: 10px;
    text-align: center;
    display: none;
}

/* Course Detail Page Styles */
.course-hero {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    padding: 20px 16px;
    text-align: center;
}

.course-hero h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.course-hero .instructor {
    font-size: 16px;
    opacity: 0.9;
}

.course-content {
    padding: 20px 16px;
}

.course-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.meta-item {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}

.meta-item .label {
    font-size: 12px;
    color: #666;
    margin-bottom: 4px;
}

.meta-item .value {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.course-description {
    margin-bottom: 24px;
}

.course-description h2 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #333;
}

.course-description p {
    line-height: 1.6;
    color: #666;
}

.enrollment-status {
    padding: 16px;
    margin-bottom: 0;
    text-align: center;
}

.status-available {
    background: #E8F5E8;
}

.status-full {
    background: #FFE8E8;
}

.status-text {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.status-available .status-text {
    color: #34C759;
}

.status-full .status-text {
    color: #FF3B30;
}

.status-detail {
    font-size: 14px;
    color: #666;
}

.register-section {
    position: sticky;
    bottom: 0;
    background: white;
    padding: 16px;
    border-top: 1px solid #eee;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.error-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

/* Register Page Styles */
.form-container {
    background: white;
    border-radius: 12px;
    padding: 30px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    flex: 1;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0,122,255,0.3);
}

.submit-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.back-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 20px;
    background: #f8f8f8;
    color: #666;
    text-decoration: none;
    border-radius: 6px;
    text-align: center;
    transition: background-color 0.3s;
}

.back-btn:hover {
    background: #e8e8e8;
}

/* 管理后台用户管理页面样式 */
.users-page .page-content {
    padding: 20px;
}

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

.users-page .page-header h2 {
    font-size: 24px;
    color: #333;
    margin: 0;
}

.users-page .header-actions .add-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.users-page .header-actions .add-btn:hover {
    background: #0056b3;
}

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

.users-page .filter-row {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.users-page .search-box {
    flex: 1;
    min-width: 300px;
    display: flex;
    gap: 10px;
}

.users-page .search-input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.users-page .search-btn {
    padding: 10px 15px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.users-page .search-btn:hover {
    background: #0056b3;
}

.users-page .filter-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.users-page .filter-select {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    background: white;
    cursor: pointer;
}

.users-page .refresh-btn {
    padding: 10px 15px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.users-page .refresh-btn:hover {
    background: #1e7e34;
}

.users-page .users-table {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

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

.users-page .users-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

.users-page .users-table tbody tr:hover {
    background: #f8f9fa;
}

.users-page .users-table .action-btn {
    padding: 5px 10px;
    margin: 0 2px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.users-page .users-table .edit-btn {
    background: #007bff;
    color: white;
}

.users-page .users-table .edit-btn:hover {
    background: #0056b3;
}

.users-page .users-table .delete-btn {
    background: #dc3545;
    color: white;
}

.users-page .users-table .delete-btn:hover {
    background: #c82333;
}

.users-page .users-table .toggle-btn {
    background: #ffc107;
    color: #212529;
}

.users-page .users-table .toggle-btn:hover {
    background: #e0a800;
}

.users-page .empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #666;
    font-size: 16px;
}

.users-page .error {
    text-align: center;
    padding: 40px 20px;
    color: #dc3545;
    font-size: 16px;
}

/* Login页面样式 */
.login-page body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.login-page .loading-container {
    text-align: center;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 400px;
    width: 100%;
}

.login-page .loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.login-page .loading-text {
    color: #666;
    font-size: 16px;
    margin-bottom: 10px;
}

.login-page .system-title {
    color: #333;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    line-height: 1.4;
}

.login-page .container {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin: 0 auto;
    margin-top: 50px;
}

.login-page .header {
    background: white;
    color: #333;
    padding: 24px 20px;
    text-align: center;
    border-bottom: 1px solid #f0f0f0;
}

.login-page .header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #333;
}

.login-page .header p {
    font-size: 16px;
    color: #6b7280;
}

.login-page .tab-container {
    margin-bottom: 20px;
}

.login-page .tab-nav {
    display: flex;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 4px;
    gap: 4px;
}

.login-page .tab-item {
    flex: 1;
    padding: 12px 16px;
    text-align: center;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: #6b7280;
}

.login-page .tab-item:hover {
    color: #374151;
    background: rgba(255, 255, 255, 0.5);
}

.login-page .tab-item.active {
    background: white;
    color: #333;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.login-page .form-container {
    padding: 24px 20px;
}

.login-page .form-group {
    margin-bottom: 20px;
}

.login-page .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
}

.login-page .form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s ease;
}

.login-page .form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.login-page .form-actions {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 20px;
    margin-top: 24px;
}

.login-page .back-btn {
    color: #6b7280;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.2s ease;
    padding: 12px 20px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    min-width: 100px;
    display: inline-block;
    text-align: center;
    font-weight: 500;
    background: transparent;
    vertical-align: top;
}

.login-page .back-btn:hover {
    color: #374151;
}

.login-page .submit-btn {
    background: #3b82f6;
    color: white;
    border: 1px solid #3b82f6;
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    min-width: 120px;
    display: inline-block;
    vertical-align: top;
}

.login-page .submit-btn:hover {
    background: #2563eb;
}

.login-page .submit-btn:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

.login-page .loading {
    display: none;
    text-align: center;
    color: #6b7280;
    margin-top: 16px;
}

.login-page .success-message {
    display: none;
    text-align: center;
    color: #059669;
    margin-top: 16px;
}

.login-page .error-message {
    color: #dc2626;
    font-size: 14px;
    margin-top: 4px;
    display: none;
}

/* Register页面样式 */
.register-page * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body.register-page {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif !important;
    background: #f8f9fa !important;
    min-height: 100vh;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 20px;
    margin: 0;
}

.register-page .container {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.register-page .header {
    background: white;
    color: #333;
    padding: 24px 20px;
    text-align: center;
    border-bottom: 1px solid #f0f0f0;
}

.register-page .system-title {
    color: #333;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    line-height: 1.4;
}

.register-page .tab-container {
    margin-bottom: 20px;
}

.register-page .tab-nav {
    display: flex;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 4px;
    gap: 4px;
}

.register-page .tab-item {
    flex: 1;
    padding: 12px 16px;
    text-align: center;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: #6b7280;
}

.register-page .tab-item:hover {
    color: #374151;
    background: rgba(255, 255, 255, 0.5);
}

.register-page .tab-item.active {
    background: white;
    color: #333;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.register-page .header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #333;
}

.register-page .header p {
    font-size: 16px;
    color: #6b7280;
}

.register-page .form-container {
    padding: 30px 24px;
    background: white;
}

.register-page .form-group {
    margin-bottom: 20px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
}

.register-page .form-group label {
    display: block;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
    transition: color 0.3s ease;
    min-width: 80px;
    flex-shrink: 0;
}

.register-page .form-group input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    color: #333;
    background: #fff;
    transition: border-color 0.2s ease;
    outline: none;
}

.register-page .form-group input:focus {
    border-color: #007bff;
    background: white;
}

.register-page .form-group input:valid {
    border-color: #10b981;
}

.register-page .form-group input[readonly] {
    background: #f3f4f6;
    color: #6b7280;
    cursor: not-allowed;
}

.register-page .form-row {
    display: flex;
    gap: 15px;
}

.register-page .form-row .form-group {
    flex: 1;
}

.register-page .error-message {
    color: #ef4444;
    font-size: 13px;
    margin-top: 6px;
    display: none;
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.register-page .submit-btn {
    background: #3b82f6;
    color: white;
    border: 1px solid #3b82f6;
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    min-width: 120px;
    display: inline-block;
    vertical-align: top;
}

.register-page .submit-btn:hover {
    background: #2563eb;
}

.register-page .submit-btn:active {
    transform: translateY(0);
}

.register-page .submit-btn:disabled {
    background: #d1d5db;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.register-page .loading {
    display: none;
    text-align: center;
    margin-top: 15px;
    color: #6b7280;
}

.register-page .loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #e5e7eb;
    border-top: 2px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

.register-page .success-message {
    background: #d1fae5;
    color: #065f46;
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 15px;
    text-align: center;
    font-weight: 500;
    display: none;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.register-page .form-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    border: none;
    border-top: none;
}

.register-page .back-btn {
    color: #6b7280;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.2s ease;
    padding: 12px 20px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    min-width: 100px;
    display: inline-block;
    text-align: center;
    font-weight: 500;
    background: transparent;
    vertical-align: top;
}

.register-page .back-btn:hover {
    color: #374151;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .register-page body {
        padding: 10px;
    }
    
    .register-page .container {
        max-width: 100%;
        border-radius: 16px;
    }
    
    .register-page .header {
        padding: 25px 20px;
    }
    
    .register-page .header h1 {
        font-size: 24px;
    }
    
    .register-page .form-container {
        padding: 30px 20px;
    }
    
    .register-page .form-group input {
        padding: 14px 16px;
        font-size: 16px;
    }
    
    .register-page .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .register-page .container {
        background: rgba(31, 41, 55, 0.95);
    }
    
    .register-page .form-container {
        background: #1f2937;
    }
    
    .register-page .form-group label {
        color: #d1d5db;
    }
    
    .register-page .form-group input {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
    
    .register-page .form-group input:focus {
         background: #4b5563;
     }
 }

/* Admin页面样式 */
.admin-page .status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

/* 简化表单样式 */
.admin-page .modal-content .form-group {
    margin-bottom: 12px;
}

.admin-page .modal-content .form-row {
    margin-bottom: 12px;
}

.admin-page .modal-content .form-group label {
    display: block;
    margin-bottom: 3px;
    font-weight: 600;
    color: #333;
    font-size: 13px;
}

.admin-page .modal-content .form-group input,
.admin-page .modal-content .form-group select,
.admin-page .modal-content .form-group textarea {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.admin-page .modal-content .form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* 多选星期几样式 */
.admin-page .weekday-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 3px;
}

.admin-page .checkbox-item {
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 3px 8px;
    border: 1px solid #ddd;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: white;
    font-size: 12px;
}

.admin-page .checkbox-item:hover {
    background: #f8f9fa;
    border-color: #007bff;
}

.admin-page .checkbox-item input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.admin-page .checkbox-item.checked {
    background: #e3f2fd;
    border-color: #007bff;
    color: #007bff;
}

.admin-page .status-badge.active {
    background: #d4edda;
    color: #155724;
}

.admin-page .status-badge.inactive {
    background: #f8d7da;
    color: #721c24;
}

/* 优化的表格样式 */
.admin-page .table-container {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.admin-page .courses-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-page .courses-table thead {
    background: #f8fafc;
    border-bottom: 2px solid #e2e8f0;
}

.admin-page .courses-table th {
    padding: 16px 12px;
    text-align: center;
    font-weight: 600;
    font-size: 13px;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-page .courses-table tbody tr {
    border-bottom: 1px solid #f1f5f9;
    transition: background-color 0.2s ease;
}

.admin-page .courses-table tbody tr:hover {
    background-color: #f8fafc;
}

.admin-page .courses-table td {
    padding: 16px 12px;
    vertical-align: middle;
}

.admin-page .col-name {
    min-width: 200px;
}

.admin-page .course-name {
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 4px;
}

.admin-page .course-desc {
    font-size: 12px;
    color: #64748b;
    line-height: 1.4;
    max-width: 250px;
}

/* 时间信息列 */
.admin-page .col-time {
    min-width: 120px;
}

.admin-page .time-info {
    text-align: center;
}

.admin-page .weekday {
    font-weight: 600;
    color: #4338ca;
    margin-bottom: 2px;
}

.admin-page .time-range {
    font-size: 12px;
    color: #64748b;
}

/* 报名情况列 */
.admin-page .col-students {
    min-width: 100px;
}

.admin-page .student-count {
    text-align: center;
    margin-bottom: 6px;
    font-weight: 600;
}

.admin-page .student-count .current {
    color: #059669;
}

.admin-page .student-count .max {
    color: #64748b;
}

.admin-page .progress-bar {
    width: 100%;
    height: 6px;
    background-color: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
}

.admin-page .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #059669);
    transition: width 0.3s ease;
}

/* 报名时间列 */
.admin-page .col-period {
    min-width: 140px;
}

.admin-page .period-info {
    text-align: center;
}

.admin-page .start-date, .admin-page .end-date {
    font-size: 12px;
    color: #64748b;
}

.admin-page .start-date {
    margin-bottom: 2px;
}

/* 操作按钮列 */
.admin-page .col-actions {
    min-width: 120px;
}

.admin-page .action-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.admin-page .action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 50px;
}

.admin-page .action-btn.edit {
    background-color: #3b82f6;
    color: white;
}

.admin-page .action-btn.edit:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
}

.admin-page .action-btn.delete {
    background-color: #ef4444;
    color: white;
}

.admin-page .action-btn.delete:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .admin-page .courses-table {
        font-size: 13px;
    }
    
    .admin-page .courses-table th,
    .admin-page .courses-table td {
        padding: 12px 8px;
    }
}

@media (max-width: 768px) {
    .admin-page .table-container {
        overflow-x: auto;
    }
    
    .admin-page .courses-table {
        min-width: 800px;
    }
}

/* 新布局样式 */
.admin-page .admin-layout {
    display: flex;
    height: 100vh;
    background-color: #f5f5f5;
}

/* 左侧菜单栏 */
.admin-page .sidebar {
    width: 250px;
    min-width: 250px;
    background: #fff;
    color: #333;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-right: 1px solid #e0e0e0;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.admin-page .sidebar.collapsed {
    width: 60px;
    min-width: 60px;
}

.admin-page .sidebar-header {
    padding: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.admin-page .sidebar-header .logo h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.admin-page .sidebar-nav {
    padding: 20px 0;
}

.admin-page .nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.admin-page .nav-item {
    margin-bottom: 2px;
}

.admin-page .nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    width: 100%;
    box-sizing: border-box;
}

.admin-page .nav-link:hover {
    background-color: #f8f9fa;
    color: #333;
    border-left-color: #007bff;
}

.admin-page .nav-item.active .nav-link {
    background-color: #f8f9fa;
    color: #007bff;
    border-left-color: #007bff;
}

.admin-page .nav-icon {
    font-size: 18px;
    margin-right: 12px;
    width: 40px;
    text-align: center;
}

/* 折叠状态下的样式 */
.admin-page .sidebar.collapsed .sidebar-header {
    padding: 15px 10px;
    text-align: center;
}

.admin-page .sidebar.collapsed .sidebar-header .logo h2 {
    display: none;
}

.admin-page .sidebar.collapsed .nav-link {
    padding: 12px 10px;
    justify-content: center;
    width: 100%;
}

.admin-page .sidebar.collapsed .nav-link span {
    display: none;
}

.admin-page .sidebar.collapsed .nav-icon {
    margin-right: 0;
}

/* 主要内容区域 */
.admin-page .main-content {
    flex: 1;
    margin-left: 250px;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
}

.admin-page .main-content.expanded {
    margin-left: 60px;
}

/* 顶部导航栏 */
.admin-page .top-navbar {
    height: 60px;
    background: white;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 999;
}

.admin-page .navbar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.admin-page .sidebar-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.admin-page .sidebar-toggle span {
    width: 100%;
    height: 2px;
    background-color: #666;
    transition: all 0.3s ease;
}

.admin-page .sidebar-toggle:hover span {
    background-color: #007bff;
}

.admin-page .page-title {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: #333;
}

.admin-page .navbar-right {
    display: flex;
    align-items: center;
}

.admin-page .user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.admin-page .user-name {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.admin-page .change-password-btn {
    padding: 8px 16px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.admin-page .change-password-btn:hover {
    background: #0056b3;
}

.admin-page .logout-btn {
    padding: 8px 16px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.admin-page .logout-btn:hover {
    background: #c82333;
}

/* 内容区域 */
.admin-page .content-area {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
}

.admin-page .page-content {
    display: none;
}

.admin-page .page-content.active {
    display: block;
}

.admin-page .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 15px 15px 15px 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e2e8f0;
}

.admin-page .page-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    color: #333;
}

.admin-page .content-body {
    background: white;
    border-radius: 8px;
    padding: 0;
    border: none;
}

/* 更新统计卡片样式 */
.admin-page .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.admin-page .stat-card {
    background: white;
    padding: 24px;
    border-radius: 8px;
    border: none;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: box-shadow 0.2s ease;
}

.admin-page .stat-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.admin-page .stat-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #007bff;
    border-radius: 8px;
    color: white;
}

.admin-page .stat-info {
    flex: 1;
}

.admin-page .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 4px;
}

.admin-page .stat-label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

/* 添加按钮样式更新 */
.admin-page .add-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.admin-page .add-btn:hover {
    background: #0056b3;
}

/* 用户管理样式 */
.admin-page .filter-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.admin-page .filter-row {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.admin-page .search-box {
    flex: 1;
    min-width: 300px;
    display: flex;
    gap: 8px;
}

.admin-page .search-input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
}

.admin-page .search-btn {
    padding: 10px 15px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.admin-page .search-btn:hover {
    background: #0056b3;
}

.admin-page .filter-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

.admin-page .filter-select {
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
    background: white;
}

.admin-page .refresh-btn {
    padding: 8px 16px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.admin-page .refresh-btn:hover {
    background: #545b62;
}

.admin-page .header-actions {
    display: flex;
    gap: 12px;
}

/* 用户表格样式 */
.admin-page .users-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: white;
}

.admin-page .users-table thead {
    background: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
}

.admin-page .users-table th {
    padding: 12px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    color: #333;
}

.admin-page .users-table tbody tr {
    border-bottom: 1px solid #f0f0f0;
}

.admin-page .users-table tbody tr:hover {
    background-color: #f8f9fa;
}

.admin-page .users-table td {
    padding: 12px;
    vertical-align: middle;
    text-align: center;
}

.admin-page .user-name {
    font-weight: 600;
    color: #2d3748;
}

.admin-page .user-phone {
    font-family: monospace;
    color: #4a5568;
}

.admin-page .user-id-card {
    font-family: monospace;
    font-size: 12px;
    color: #718096;
}

.admin-page .user-status {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.admin-page .user-status.active {
    background: #d4edda;
    color: #155724;
}

.admin-page .user-status.inactive {
    background: #f8d7da;
    color: #721c24;
}

.admin-page .user-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.admin-page .user-action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.admin-page .user-action-btn.edit {
    background-color: #007bff;
    color: white;
}

.admin-page .user-action-btn.edit:hover {
    background-color: #0056b3;
}

.admin-page .user-action-btn.toggle {
    background-color: #ffc107;
    color: #212529;
}

.admin-page .user-action-btn.toggle:hover {
    background-color: #e0a800;
}

.admin-page .user-action-btn.delete {
    background-color: #dc3545;
    color: white;
}

.admin-page .user-action-btn.delete:hover {
    background-color: #c82333;
}

.admin-page .user-registration-date {
    font-size: 12px;
    color: #6c757d;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .admin-page .sidebar {
        transform: translateX(-250px);
    }

    .admin-page .sidebar.show {
        transform: translateX(0);
    }

    .admin-page .main-content {
        margin-left: 0;
    }

    .admin-page .main-content.expanded {
        margin-left: 0;
    }

    .admin-page .stats-grid {
        grid-template-columns: 1fr;
    }

    .admin-page .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .admin-page .navbar-left {
        gap: 15px;
    }

    .admin-page .page-title {
        font-size: 18px;
    }

    .admin-page .filter-row {
        flex-direction: column;
        align-items: stretch;
    }

    .admin-page .search-box {
        min-width: auto;
    }

    .admin-page .filter-controls {
        justify-content: space-between;
    }
}

/* 查询页面样式 */
.query-form-card {
    background: white;
    margin: 20px;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.query-form-card .form-group {
    margin-bottom: 0;
}

.query-form-card label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.input-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.input-group input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #007bff;
}

.query-btn {
    padding: 12px 24px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.query-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

.query-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
}

/* 查询结果样式 */
.query-results {
    padding: 0 20px 100px;
}

.user-info-card,
.registrations-card {
    background: white;
    margin-bottom: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.card-header {
    background: #f8f9fa;
    padding: 16px 20px;
    border-bottom: 1px solid #e9ecef;
}

.card-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.info-item span {
    font-size: 16px;
    color: #333;
    font-weight: 600;
}

/* 报名记录项样式 */
.registration-item {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.registration-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.registration-header {
    background: #f8f9fa;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.course-info h4 {
    margin: 0 0 8px 0;
    font-size: 18px;
    color: #333;
}

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

.course-image {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.registration-details {
    padding: 16px;
}

.detail-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #666;
}

.detail-item i {
    width: 16px;
    color: #007bff;
}

.course-description {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid #e9ecef;
}

.course-description p {
    margin: 0;
    color: #666;
    line-height: 1.5;
}

.registration-actions {
    padding: 16px;
    background: #f8f9fa;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.btn-secondary {
    padding: 8px 16px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-danger {
    padding: 8px 16px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
}

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

/* 状态样式 */
.status-active {
    background: #28a745;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.status-cancelled {
    background: #6c757d;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.course-status-active {
    background: #007bff;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.course-status-pending {
    background: #ffc107;
    color: #212529;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.course-status-ended {
    background: #6c757d;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

/* 空状态和错误状态 */
.empty-state,
.error-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state i,
.error-state i {
    font-size: 64px;
    margin-bottom: 20px;
    color: #ccc;
}

.empty-state h3,
.error-state h3 {
    margin: 0 0 12px 0;
    font-size: 20px;
    color: #333;
}

.empty-state p,
.error-state p {
    margin: 0 0 24px 0;
    color: #666;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.3s ease;
}

.btn-primary:hover {
    background: #0056b3;
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 414px;
    background: white;
    border-top: 1px solid #e9ecef;
    display: flex;
    justify-content: space-around;
    padding: 12px 0;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: #666;
    font-size: 12px;
    transition: color 0.3s ease;
}

.nav-item.active {
    color: #007bff;
}

.nav-item i {
    font-size: 20px;
}

/* 我的报名按钮样式 */
.my-registration-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #f8f9fa;
    color: #6c757d;
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid #dee2e6;
    white-space: nowrap;
    flex-shrink: 0;
}

.my-registration-btn:hover {
    background: #e9ecef;
    color: #495057;
    text-decoration: none;
}

.my-registration-btn i {
    font-size: 12px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .search-box {
        flex-direction: row;
        gap: 8px;
    }
    
    .my-registration-btn {
        margin-left: 0;
        font-size: 11px;
        padding: 6px 8px;
    }
    
    .search-input {
        font-size: 13px;
        padding: 8px 35px 8px 12px;
    }
    
    .search-icon {
        right: 12px;
        font-size: 14px;
    }
    
    .search-input-wrapper {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .query-btn {
        width: 100%;
    }
    
    .registration-actions {
        flex-direction: column;
    }
    
    .registration-header {
        flex-direction: column;
        gap: 12px;
    }
    
    .course-image {
        align-self: flex-start;
    }
}