/* 导航栏样式 */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1152px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    flex-shrink: 0;
}

.nav-logo img {
    height: 36px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 32px;
    margin-left: 48px;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1.6px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-menu a:hover::after {
    transform: scaleX(1);
}

.nav-actions {
    display: flex;
    gap: 13px;
    align-items: center;
}

.btn-text {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 13px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.btn-text:hover {
    color: var(--primary);
    background: var(--primary-light);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 20px;
    height: 16px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-btn span {
    width: 100%;
    height: 1.6px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-container {
        height: 56px;
        padding: 0 16px;
    }

    .nav-menu {
        gap: 16px;
        margin-left: 24px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(8px);
        padding: 16px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        flex-direction: column;
        gap: 13px;
    }

    .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}