/* 全局样式 */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

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

/* 导航栏样式 */
.navbar {
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-scrolled {
    background-color: rgba(52, 58, 64, 0.95) !important;
    backdrop-filter: blur(10px);
}

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

.nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* 英雄区域样式 */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons .btn {
    padding: 12px 30px;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.hero-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.hero-image {
    position: relative;
    z-index: 1;
}

.hero-image img {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* 章节标题样式 */
.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 3rem;
}

/* 特色卡片样式 */
.feature-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.feature-icon {
    color: var(--primary-color);
}

.feature-card h5 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

/* 新闻卡片样式 */
.news-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.news-image {
    overflow: hidden;
}

.news-image img {
    transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-title a {
    color: var(--dark-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

.news-title a:hover {
    color: var(--primary-color);
}

.news-summary {
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 产品卡片样式 */
.product-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.product-image {
    overflow: hidden;
}

.product-image img {
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-title {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.product-description {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.product-features .badge {
    font-size: 0.8rem;
    padding: 5px 10px;
}

/* 统计数据样式 */
.stats-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
}

.stat-item {
    padding: 2rem 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 页脚样式 */
footer {
    background: var(--dark-color);
}

.social-links a {
    transition: all 0.3s ease;
}

.social-links a:hover {
    transform: translateY(-3px);
    color: var(--primary-color) !important;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

/* 按钮样式 */
.btn {
    border-radius: 50px;
    font-weight: 600;
    padding: 10px 25px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: #0056b3;
    border-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,123,255,0.3);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .feature-card,
    .news-card,
    .product-card {
        margin-bottom: 2rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

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

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

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* 工具提示样式 */
.tooltip {
    font-size: 0.875rem;
}

/* 模态框样式 */
.modal-content {
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    border-radius: 15px 15px 0 0;
}

.modal-footer {
    border-top: 1px solid #dee2e6;
    border-radius: 0 0 15px 15px;
}

/* 表单样式 */
.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

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

.form-label {
    font-weight: 600;
    color: var(--dark-color);
}

/* 表格样式 */
.table {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.table thead th {
    background: var(--primary-color);
    color: white;
    border: none;
    font-weight: 600;
}

.table tbody tr:hover {
    background-color: rgba(0,123,255,0.05);
}

/* 分页样式 */
.pagination .page-link {
    border-radius: 50%;
    margin: 0 2px;
    border: none;
    color: var(--primary-color);
}

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

/* 警告框样式 */
.alert {
    border-radius: 10px;
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 徽章样式 */
.badge {
    border-radius: 20px;
    padding: 5px 12px;
    font-weight: 500;
}

/* 卡片组样式 */
.card {
    border-radius: 15px;
    border: none;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

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

.card-header {
    background: var(--primary-color);
    color: white;
    border-radius: 15px 15px 0 0 !important;
    border: none;
}

/* 进度条样式 */
.progress {
    border-radius: 10px;
    height: 8px;
}

.progress-bar {
    border-radius: 10px;
}

/* 面包屑导航样式 */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: var(--secondary-color);
}

/* 侧边栏样式 */
.sidebar {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    padding: 2rem;
}

.sidebar .nav-link {
    color: var(--dark-color);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

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

/* 搜索框样式 */
.search-box {
    position: relative;
}

.search-box .form-control {
    padding-right: 50px;
}

.search-box .btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    padding: 0;
}

/* 标签云样式 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-cloud .badge {
    cursor: pointer;
    transition: all 0.3s ease;
}

.tag-cloud .badge:hover {
    transform: scale(1.1);
}

/* 时间轴样式 */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary-color);
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .btn,
    .sidebar {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .hero-section {
        background: white !important;
        color: black !important;
    }
}