/* 管理系统样式 */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

/* 全局样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #007bff 0%, #6610f2 100%);
    color: white;
    padding: 100px 0;
    min-height: 50vh;
    display: flex;
    align-items: center;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-section .lead {
    font-size: 1.25rem;
    margin-bottom: 30px;
}

.hero-image i {
    font-size: 200px;
    opacity: 0.8;
}

/* 导航栏 */
.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: white;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.card-header {
    border-radius: 10px 10px 0 0 !important;
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* 章节间距 */
section {
    padding: 80px 0;
}

/* Footer */
footer {
    margin-top: auto;
}

/* 表单样式 */
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 用户中心样式 */
.user-sidebar {
    background: #f8f9fa;
    min-height: calc(100vh - 56px);
    padding: 20px;
}

.user-sidebar .nav-link {
    color: #333;
    padding: 10px 15px;
    border-radius: 5px;
    margin-bottom: 5px;
}

.user-sidebar .nav-link:hover,
.user-sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

/* 后台管理样式 */
.admin-sidebar {
    background: #343a40;
    min-height: calc(100vh - 56px);
    padding: 20px 0;
}

.admin-sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 10px 20px;
    border-left: 3px solid transparent;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary-color);
}

/* 表格样式 */
.table-hover tbody tr:hover {
    background-color: rgba(0, 123, 255, 0.1);
}

/* 徽章样式 */
.badge {
    padding: 5px 10px;
    font-weight: 500;
}

/* 分页样式 */
.pagination {
    justify-content: center;
    margin-top: 30px;
}

.pagination .page-link {
    color: var(--primary-color);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-section {
        padding: 50px 0;
        text-align: center;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-image {
        display: none;
    }
    
    section {
        padding: 40px 0;
    }
}

/* 登录注册页面 */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.auth-card {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 工具提示 */
.tooltip-inner {
    max-width: 300px;
    padding: 10px;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}