/* 技术培训网站样式 */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.navbar-brand {
    font-size: 1.5rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-section h1 {
    color: white;
}

/* 卡片悬停效果 */
.hover-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,.1);
}

/* 统计数据 */
.stat-item {
    padding: 20px;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: scale(1.05);
}

/* 课程卡片 */
.card-img-top {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 徽章样式 */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
}

/* 按钮样式 */
.btn {
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,.15);
}

/* 页脚样式 */
footer {
    margin-top: auto;
}

footer a:hover {
    color: #0d6efd !important;
}

/* 文章内容样式 */
.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.article-content ul {
    margin-left: 1.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }

    .stat-item h3 {
        font-size: 2rem;
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* 渐变背景 */
.bg-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 粘性定位 */
.sticky-top {
    position: sticky;
    top: 20px;
    z-index: 1020;
}