/* 顶部导航栏样式 */

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    margin: 0 auto;
    transition: all 0.3s ease;
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    max-width: 1200px;
    width: calc(100% - 80px);
    z-index: 100;
    background: rgba(245, 247, 250, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-sizing: border-box;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    box-shadow: var(--shadow-light);
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--animation-speed);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--primary-color);
    transition: width var(--animation-speed);
}

.nav-link:hover::after {
    width: 100%;
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
}