/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #007bff 0%, #28a745 100%);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-logo h2 {
    font-size: 1.8rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255,255,255,0.2);
    color: #fff;
}

/* 主要内容样式 */
.main-content {
    min-height: calc(100vh - 120px);
}

/* 欢迎区域样式 */
.hero-section {
    background: linear-gradient(135deg, #007bff 0%, #28a745 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: #ff6b6b;
    color: white;
}

.btn-primary:hover {
    background-color: #ff5252;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #007bff;
}

.btn-outline {
    background-color: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-outline:hover {
    background-color: #007bff;
    color: white;
}

/* 组织信息样式 */
.organization-info {
    padding: 4rem 0;
    background-color: white;
}

.organization-info h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.info-card {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.info-card:hover {
    transform: translateY(-5px);
}

.info-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.info-card p {
    color: #666;
    line-height: 1.6;
}

.contact-info {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

/* 即将举行的活动样式 */
.upcoming-events {
    padding: 4rem 0;
    background-color: #f9f9f9;
}

.upcoming-events h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.event-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.event-card:hover {
    transform: translateY(-5px);
}

.event-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #007bff 0%, #28a745 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.event-content {
    padding: 1.5rem;
}

.event-title {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: #333;
}

.event-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #666;
}

.event-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.event-description {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.event-category {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.view-all {
    text-align: center;
}

/* 页脚样式 */
.footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
    font-size: 1.2rem;
    color: #666;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #007bff;
    border-top: 3px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .events-grid {
        grid-template-columns: 1fr;
    }
}