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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 登录页面样式 */
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 40px;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    color: #667eea;
    font-size: 24px;
    margin-bottom: 5px;
}

.logo h2 {
    color: #764ba2;
    font-size: 18px;
    font-weight: normal;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-bottom: 15px;
    min-height: 20px;
    text-align: center;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.login-btn:hover {
    transform: translateY(-2px);
}

.footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
    font-size: 12px;
}

/* 主页面样式 */
.dashboard-container {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    flex-direction: column;
}

header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 40px;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content h1 {
    color: #667eea;
    font-size: 24px;
}

.logout-btn {
    padding: 10px 20px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

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

/* Dashboard布局 */
.dashboard-layout {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
    gap: 0;
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background: rgba(255, 255, 255, 0.95);
    margin: 20px 0 20px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    height: fit-content;
    position: sticky;
    top: 20px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: #f0f3ff;
    border-left-color: #667eea;
}

.nav-item.active {
    background: #f0f3ff;
    border-left-color: #667eea;
    color: #667eea;
    font-weight: 600;
}

.nav-icon {
    font-size: 20px;
    margin-right: 12px;
}

.nav-text {
    font-size: 16px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin: 20px;
    padding: 0;
}

.welcome-section {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.welcome-section h2 {
    color: #333;
    font-size: 28px;
}

.countdown-section {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.countdown-section h3 {
    color: #667eea;
    font-size: 24px;
    margin-bottom: 20px;
}

.deadline-info {
    margin-bottom: 30px;
}

.deadline-text {
    color: #666;
    font-size: 16px;
}

.countdown-display {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-number {
    font-size: 48px;
    font-weight: bold;
    color: #667eea;
    background: #f0f3ff;
    padding: 20px 30px;
    border-radius: 10px;
    min-width: 100px;
}

.countdown-label {
    margin-top: 10px;
    color: #666;
    font-size: 14px;
}

.deadline-status {
    margin-top: 20px;
    font-size: 18px;
    font-weight: 500;
    min-height: 25px;
}

.deadline-status.expired {
    color: #e74c3c;
}

.deadline-status.active {
    color: #27ae60;
}

/* 页面头部 */
.page-header {
    background: white;
    border-radius: 10px;
    padding: 25px 30px;
    margin-bottom: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header h2 {
    color: #333;
    font-size: 28px;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.robot-stats {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 8px 16px;
    border-radius: 20px;
    color: white;
    font-size: 14px;
    font-weight: 500;
}

.action-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.action-btn.active {
    background: #e74c3c;
}

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

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-success {
    background: #27ae60;
    color: white;
}

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

.btn-secondary {
    background: #95a5a6;
    color: white;
}

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

.btn-info {
    background: #3498db;
    color: white;
    text-decoration: none;
    display: inline-block;
}

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

.btn-warning {
    background: #f39c12;
    color: white;
}

.btn-warning:hover {
    background: #e67e22;
}

/* 信息横幅 */
.info-banner {
    background: #fff9e6;
    border-left: 4px solid #f39c12;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.info-banner p {
    margin: 0 0 10px 0;
    color: #856404;
    font-weight: 600;
}

.info-banner ul {
    margin: 10px 0 0 0;
    padding-left: 20px;
}

.info-banner li {
    color: #856404;
    margin: 8px 0;
    line-height: 1.6;
}

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.modal-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.modal-content li {
    margin: 10px 0;
    line-height: 1.6;
}

/* 内容卡片 */
.content-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.content-card h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 20px;
}

/* 会议纪要样式 */
.meeting-content {
    line-height: 1.8;
    color: #333;
}

.meeting-title {
    color: #667eea;
    font-size: 20px;
    margin: 25px 0 15px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f3ff;
}

.meeting-item {
    margin: 10px 0;
    padding-left: 0;
}

.meeting-subitem {
    margin: 8px 0;
    padding-left: 20px;
    color: #555;
}

.meeting-content p {
    margin: 8px 0;
}

/* 编辑器样式 */
.meeting-editor {
    width: 100%;
}

.editor-textarea {
    width: 100%;
    min-height: 600px;
    padding: 20px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
}

.editor-textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* 文档列表 */
.doc-list {
    list-style: none;
    padding: 0;
}

.doc-list li {
    display: flex;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s;
}

.doc-list li:hover {
    background: #f8f9fa;
}

.doc-list li:last-child {
    border-bottom: none;
}

.doc-icon {
    font-size: 24px;
    margin-right: 15px;
}

.doc-list a {
    flex: 1;
    color: #333;
    text-decoration: none;
    font-weight: 500;
}

.doc-list a:hover {
    color: #667eea;
}

.doc-date {
    color: #999;
    font-size: 13px;
}

/* 机器人状态卡片 */
.section-container {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid #f0f0f0;
}

.section-header h3 {
    color: #333;
    font-size: 24px;
    margin: 0;
}

.section-count {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 700;
}

.robot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.robot-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.robot-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.robot-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}

.robot-card h3 {
    color: #333;
    font-size: 20px;
    margin: 0;
}

.robot-school {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.robot-status {
    margin-bottom: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.status-badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.type-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.type-badge.type-new {
    background: #fff3cd;
    color: #856404;
}

.type-badge.type-stock {
    background: #d1ecf1;
    color: #0c5460;
}

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

.status-badge.status-progress {
    background: #cce5ff;
    color: #004085;
}

.status-badge.status-warning {
    background: #fff3cd;
    color: #856404;
}

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

.robot-info {
    margin: 15px 0;
}

.robot-info p {
    color: #555;
    margin: 8px 0;
    font-size: 14px;
    line-height: 1.6;
}

.robot-info strong {
    color: #333;
    font-weight: 600;
}

.robot-notes {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.robot-note {
    color: #666;
    margin: 6px 0;
    font-size: 13px;
    line-height: 1.5;
}

.robot-desc {
    color: #666;
    margin: 8px 0;
}

.robot-progress {
    color: #667eea;
    font-weight: 600;
    margin: 8px 0;
}

/* 编辑模式样式 */
.robot-card.edit-mode {
    border: 2px dashed #667eea;
}

.card-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.edit-card-btn, .delete-card-btn {
    flex: 1;
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.edit-card-btn {
    background: #667eea;
    color: white;
}

.edit-card-btn:hover {
    background: #5568d3;
}

.delete-card-btn {
    background: #e74c3c;
    color: white;
}

.delete-card-btn:hover {
    background: #c0392b;
}

/* 弹窗样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.modal-content {
    background: white;
    border-radius: 15px;
    padding: 30px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-content h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}

.btn-primary,
.btn-secondary {
    flex: 1;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.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-secondary {
    background: #95a5a6;
    color: white;
}

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

footer {
    text-align: center;
    padding: 20px;
    color: white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .dashboard-layout {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        margin: 20px;
        position: relative;
        top: 0;
    }
    
    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .nav-item {
        border-left: none;
        border-bottom: 3px solid transparent;
        white-space: nowrap;
    }
    
    .nav-item:hover,
    .nav-item.active {
        border-left: none;
        border-bottom-color: #667eea;
    }
    
    .robot-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    header {
        padding: 15px 20px;
    }
    
    .header-content h1 {
        font-size: 18px;
    }
    
    .countdown-display {
        gap: 15px;
    }
    
    .countdown-number {
        font-size: 32px;
        padding: 15px 20px;
        min-width: 70px;
    }
    
    .main-content {
        margin: 20px 10px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .robot-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-icon {
        font-size: 18px;
    }
    
    .nav-text {
        font-size: 14px;
    }
}

/* 媒体展示样式 */
.media-section {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.media-card {
    background: #f9f9f9;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.media-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.media-header {
    padding: 15px 20px;
    background: white;
    border-bottom: 2px solid #e0e0e0;
}

.media-header h4 {
    color: #333;
    margin-bottom: 8px;
    font-size: 18px;
}

.media-date {
    color: #667eea;
    font-size: 14px;
    font-weight: 600;
}

.video-container {
    position: relative;
    width: 100%;
    background: black;
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

.media-info {
    padding: 15px 20px;
    background: white;
}

.media-info p {
    margin-bottom: 8px;
    color: #666;
    line-height: 1.6;
}

.media-info p:last-child {
    margin-bottom: 0;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #999;
    font-size: 16px;
}

/* 拖拽上传区域 */
.drop-zone {
    border: 2px dashed #ccc;
    border-radius: 10px;
    padding: 40px;
    margin: 20px 0;
    text-align: center;
    transition: all 0.3s ease;
    background: #fafafa;
}

.drop-zone.drag-over {
    border-color: #667eea;
    background: #f0f4ff;
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.drop-zone-icon {
    font-size: 48px;
    margin: 0;
}

.drop-zone-text {
    font-size: 18px;
    color: #333;
    margin: 0;
}

.drop-zone-hint {
    font-size: 14px;
    color: #666;
    margin: 0;
}

.upload-btn {
    margin-top: 10px;
    padding: 10px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.2s;
}

.upload-btn:hover {
    transform: translateY(-2px);
}

/* 区域操作按钮 */
.section-actions {
    display: flex;
    gap: 10px;
}

.delete-type-btn {
    padding: 8px 15px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s;
}

.delete-type-btn:hover {
    background: #c0392b;
}

/* 视频操作按钮 */
.media-actions {
    padding: 10px 20px;
    background: white;
    border-top: 1px solid #e0e0e0;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.edit-video-btn, .delete-video-btn {
    padding: 6px 15px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.edit-video-btn {
    background: #3498db;
    color: white;
}

.edit-video-btn:hover {
    background: #2980b9;
}

.delete-video-btn {
    background: #e74c3c;
    color: white;
}

.delete-video-btn:hover {
    background: #c0392b;
}

/* 信息提示横幅 */
.info-banner {
    background: #e8f4f8;
    border-left: 4px solid #3498db;
    padding: 15px 20px;
    margin-bottom: 25px;
    border-radius: 5px;
}

.info-banner p {
    margin: 0;
    color: #2c3e50;
    line-height: 1.6;
}

.info-banner code {
    background: #d4e9f2;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}