/* ===== 阿里云风格导航栏 ===== */

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-bar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo img {
    height: 32px;
}

.nav-logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-left: 8px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-item > a:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.nav-item.active > a {
    color: var(--primary-color);
    font-weight: 500;
}

/* 下拉菜单 */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown a {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--text-primary);
}

.nav-dropdown a:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* 导航右侧 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-btn {
    padding: 8px 20px;
    font-size: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.nav-btn-primary {
    background: var(--primary-color);
    color: #fff;
    border: none;
}

.nav-btn-primary:hover {
    background: var(--primary-hover);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 6px auto;
    transition: var(--transition);
}

/* ===== Footer ===== */
.footer {
    background: #1D2129;
    color: #fff;
    padding: 60px 0 0;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.footer-contact p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
}

.footer-contact strong {
    color: #fff;
    font-size: 18px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
    color: #fff;
}

.footer-qrcode {
    text-align: center;
}

.footer-qrcode img {
    width: 120px;
    height: 120px;
    background: #fff;
    padding: 8px;
    border-radius: var(--radius-md);
}

.footer-qrcode p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

/* 底部版权 */
.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
    color: #fff;
}

/* 响应式 */
@media (max-width: 1200px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu.mobile-active {
        display: flex;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid #E5E6EB;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    }
    
    .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: 16px;
        background: #F7F8FA;
        border-radius: 4px;
        margin-top: 8px;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        align-items: center;
    }
}