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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部导航样式 */
header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-section {
    flex: 0 0 auto;
}

.logo-link {
    color: white;
    text-decoration: none;
    font-size: 24px;
    font-weight: 700;
    padding: 10px 20px;
    border: 2px solid white;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.logo-link:hover {
    background-color: white;
    color: #2a5298;
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
    border: 2px solid transparent;
}

.nav-links a:hover {
    background-color: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

/* 当前页面红色标识 */
.nav-links a.active {
    background-color: #00008B ;
    color: #fff ;
    font-weight: bold;
    border-radius: 6px;
}

/* 页脚样式 */
footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 30px 0;
    margin-top: 50px;
}

footer div {
    text-align: center;
    padding: 10px 0;
    max-width: 1200px;
    margin: 0 auto;
}

footer div:first-child {
    border-bottom: 1px solid rgba(255,255,255,0.2);
    margin-bottom: 10px;
    padding-bottom: 15px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }
    
    .nav-links a {
        text-align: center;
        width: 100%;
    }
    
    .logo-link {
        font-size: 20px;
        padding: 8px 16px;
    }
}

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