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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: #f8f9fa;
    min-height: 100vh;
    color: #333;
}

/* 通用容器 */
.container {
    max-width: 1000px;
    margin: 30px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

/* 认证页面容器 */
.auth-container {
    max-width: 500px;
    margin: 50px auto;
    padding: 40px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.auth-card {
    padding: 0;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6b4090 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f8f9fa;
    color: #495057;
    border: 1px solid #dee2e6;
}

.btn-secondary:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.btn-danger {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #e685f0 0%, #e4475c 100%);
}

.btn-success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #3a9bf4 0%, #00d9e4 100%);
}

/* 表格样式 */
.table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

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

thead {
    background: #f8f9fa;
}

th {
    padding: 15px 20px;
    text-align: left;
    font-weight: 600;
    color: #495057;
    border-bottom: 2px solid #dee2e6;
}

td {
    padding: 15px 20px;
    border-bottom: 1px solid #dee2e6;
}

tr:hover {
    background: #f8f9fa;
}

/* 表单样式 */


/* 导航栏样式 */
.navbar {
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 0 0 15px 15px;
    margin-bottom: 30px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: #667eea;
    text-decoration: none;
}

.navbar-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 14px;
    }
    
    .table-responsive {
        overflow-x: auto;
    }
}

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

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 24px;
    color: white;
}

.stat-icon.users,
.stat-icon.gpa {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.students,
.stat-icon.courses {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-icon.teachers,
.stat-icon.credits {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-icon.courses,
.stat-icon.ranking {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: #718096;
    margin-bottom: 10px;
}

.stat-change {
    font-size: 12px;
    display: flex;
    align-items: center;
}

.stat-change.positive {
    color: #38a169;
}

.stat-change i {
    margin-right: 5px;
}

/* 功能卡片样式 */
.function-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.function-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    border: 2px solid transparent;
}

.function-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
    border-color: #4a90e2;
}

.function-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: white;
}

.function-title {
    font-size: 20px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 15px;
}

.function-description {
    font-size: 14px;
    color: #718096;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 系统状态样式 */
.system-status {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

.section-title {
    font-size: 20px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
}

.section-title i {
    margin-right: 10px;
    color: #4a90e2;
}

.status-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.status-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: #f7fafc;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.status-item:hover {
    background: #edf2f7;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 15px;
}

.status-indicator.online {
    background-color: #38a169;
}

.status-indicator.warning {
    background-color: #d69e2e;
}

.status-indicator.offline {
    background-color: #e53e3e;
}

.status-label {
    font-size: 14px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 5px;
}

.status-value {
    font-size: 12px;
    color: #718096;
}

/* 最近活动样式 */
.recent-activities {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.activity-list {
    list-style: none;
    padding: 0;
}

.activity-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid #e2e8f0;
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f7fafc;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: #4a90e2;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-size: 14px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 5px;
}

.activity-time {
    font-size: 12px;
    color: #718096;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: #718096;
    margin-top: 5px;
}

.breadcrumb a {
    color: #4a90e2;
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: #357abd;
    text-decoration: underline;
}

.breadcrumb i {
    margin: 0 10px;
    font-size: 12px;
}

/* 当前时间显示 */
.current-time {
    font-size: 14px;
    color: #718096;
    background: #f7fafc;
    padding: 8px 15px;
    border-radius: 20px;
}

/* 页面标题 */
.page-title {
    font-size: 24px;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 5px;
}

/* 内容头部 */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
}

/* ==================== 主页样式 ==================== */
/* 英雄区域 */
.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-bg.jpg') center/cover no-repeat;
    opacity: 0.1;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 40px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin: 20px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    color: #2c3e50;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    color: #7f8c8d;
    opacity: 0.9;
    line-height: 1.6;
}

/* 功能区域 */
.features-section {
    padding: 80px 20px;
    background-color: #f8f9fa;
    border-radius: 20px;
    margin: 40px 20px;
}

.section-title {
    text-align: center;
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 32px;
    color: white;
}

.feature-title {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.feature-description {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 行动号召区域 */
.cta-section {
    text-align: center;
    padding: 80px 20px;
}

.cta-title {
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 20px 20px 0 0;
    margin-top: 80px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    margin-top: 30px;
    color: #999;
    font-size: 0.9rem;
}

/* 主页响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}

/* ==================== 仪表板通用样式 ==================== */
/* 仪表板布局 */
.dashboard-container {
    display: flex;
    min-height: calc(100vh - 100px);
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar.admin-sidebar {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
}

.sidebar.teacher-sidebar {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
}

.sidebar-header {
    padding: 30px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

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

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    font-weight: 600;
}

.user-details h3 {
    color: white;
    font-size: 16px;
    margin-bottom: 5px;
}

.user-details p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
}

.sidebar-menu {
    list-style: none;
    padding: 0 20px;
}

.sidebar-menu li {
    margin-bottom: 10px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.sidebar-menu a.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.sidebar-menu i {
    width: 20px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    flex: 1;
    padding: 30px;
    background: #f8f9fa;
    overflow-y: auto;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.content-header h1 {
    font-size: 28px;
    color: #2c3e50;
    margin: 0;
}

.breadcrumb {
    color: #7f8c8d;
    font-size: 14px;
    margin-top: 5px;
}



/* 成绩表格 */
.grades-table {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid #eee;
}

.table-title {
    font-size: 1.3rem;
    color: #333;
    margin: 0;
}

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

.table-container {
    overflow-x: auto;
}

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

.grades-table th {
    background: #f8f9ff;
    padding: 15px 20px;
    text-align: left;
    font-weight: 600;
    color: #333;
    border-bottom: 1px solid #eee;
}

.grades-table td {
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
}

.grades-table tr:hover {
    background: #f8f9ff;
}

/* 成绩徽章 */
.grade-badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: white;
}

.grade-badge.A {
    background: #2ecc71;
}

.grade-badge.B {
    background: #3498db;
}

.grade-badge.C {
    background: #f39c12;
}

.grade-badge.D {
    background: #e74c3c;
}

/* 查看按钮 */
.view-btn {
    background: #f8f9fa;
    color: #495057;
    border: 1px solid #dee2e6;
    padding: 8px 16px;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.view-btn:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

/* 仪表板响应式设计 */
@media (max-width: 992px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
    }
    
    .sidebar-menu {
        display: flex;
        overflow-x: auto;
        padding: 10px 20px;
    }
    
    .sidebar-menu li {
        margin-bottom: 0;
        margin-right: 10px;
    }
    
    .sidebar-menu a {
        white-space: nowrap;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 20px;
    }
    
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-actions {
        flex-direction: column;
    }
    
    .function-grid {
        grid-template-columns: 1fr;
    }
    
    .status-list {
        grid-template-columns: 1fr;
    }
}

/* ==================== 管理页面通用样式 ==================== */
/* 页面容器 */
.page-container {
    padding: 20px;
}

/* 页面头部 */
.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.page-header p {
    color: #7f8c8d;
    font-size: 16px;
    margin: 0;
}

/* 过滤区域 */
.filter-section {
    background: white;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.filter-title {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.filter-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    min-width: 200px;
}

.filter-group label {
    font-size: 14px;
    color: #666;
    margin-bottom: 5px;
}

/* 表单样式 */
.entry-form {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

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

.form-group label {
    display: block;
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

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



/* 操作按钮 */
.action-buttons {
    display: flex;
    gap: 10px;
}

.btn-add {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 233, 123, 0.3);
}

/* 管理页面响应式设计 */
@media (max-width: 768px) {
    .filter-form {
        grid-template-columns: 1fr;
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .filter-group {
        min-width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}/* ��1laqZXO͓�\!} */

.notification {

    position: fixed;

    top: 20px;

    right: 20px;

    padding: 15px 25px;

    background: white;

    border-radius: 8px;

    box-shadow: 0 4px 12px rgba(0,0,0,0.15);

    display: flex;

    align-items: center;

    z-index: 1000;

    transform: translateX(120%);

    transition: transform 0.3s ease;

    border-left: 4px solid #4e73df;

    max-width: 350px;

}



.notification.show {

    transform: translateX(0);

}



.notification.success {

    border-left-color: #2ecc71;

}



.notification.error {

    border-left-color: #e74c3c;

}



.notification i {

    margin-right: 10px;

    font-size: 1.2em;

}



.notification.success i {

    color: #2ecc71;

}



.notification.error i {

    color: #e74c3c;

}



.notification-content {

    font-size: 14px;

    color: #333;

}