/* 顶部导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 90%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    color: white;
    font-size: 1.8rem;
    
    /* padding: 18px 15px; */
    /* font-weight: bold; */
    text-decoration: none;
    padding: 20px 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 18px 15px;
    font-size: 24px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    font-weight: normal;
}

.nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #fff9c4, #ffeb3b);
    border-radius: 3px 3px 0 0;
}


/* 响应式设计 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 25px 0;
}