/* ========== 统一导航栏样式 ========== */

.top-bar {
    background: var(--dark-blue);
    color: var(--white);
    padding: 12px 0;
    font-size: 14px;
}

.top-bar-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.contact-info {
display: flex
;
    gap: 30px;
    align-content: stretch;
    flex-wrap: wrap;
    flex-direction: column;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.language-switch {
    color: var(--white);
    text-decoration: none;
    padding-left: 20px;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    transition: color 0.3s ease;
}

.language-switch:hover {
    color: var(--secondary-blue);
}

/* 主导航 - 支持二级导航 */
.main-nav {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
    height: 80px;
}

.nav-item {
    position: relative;
    height: 80px;
    display: flex;
    align-items: center;
}

.nav-link {
    font-size: 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    padding: 28px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

/* 二级导航下拉菜单 */
.has-submenu > .nav-link::before {
    content: '▼';
    font-size: 8px;
    transition: transform 0.3s ease;
}

.has-submenu:hover > .nav-link::before {
    transform: rotate(180deg);
}

.submenu {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--white);
    min-width: 220px;
    border-radius: 8px;
    box-shadow: var(--shadow-heavy);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 12px 0;
    z-index: 1001;
}

.nav-item:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.submenu::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--white);
}

.submenu-item {
    position: relative;
}

.submenu-link {
    display: block;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.submenu-link:hover {
    background: var(--gray-light);
    color: var(--primary-blue);
    padding-left: 32px;
}

.submenu-link::after {
    content: '→';
    opacity: 0;
    transition: all 0.2s ease;
}

.submenu-link:hover::after {
    opacity: 1;
}

/* 三级导航 */
.has-submenu-3 > .submenu-link::before {
    content: '▶';
    font-size: 8px;
    margin-right: 8px;
}

.submenu-3 {
    position: absolute;
    top: 0;
    left: 100%;
    margin-left: 12px;
    background: var(--white);
    min-width: 200px;
    border-radius: 8px;
    box-shadow: var(--shadow-heavy);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 12px 0;
    z-index: 1002;
}

.submenu-item:hover > .submenu-3 {
    opacity: 1;
    visibility: visible;
    left: calc(100% + 12px);
}

.submenu-3::before {
    content: '';
    position: absolute;
    top: 15px;
    left: -8px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 8px solid var(--white);
}

.submenu-3-link {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.submenu-3-link:hover {
    background: var(--gray-light);
    color: var(--primary-blue);
    padding-left: 28px;
}

.submenu-divider {
    height: 1px;
    background: var(--gray-medium);
    margin: 8px 0;
}

.submenu-heading {
    padding: 8px 24px;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 12px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
}

/* ========== 统一底部样式 ========== */

.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 80px 40px 40px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-section p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-blue);
}

/* 二维码区域 */
.qr-codes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.qr-item {
    text-align: center;
}

.qr-code {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.qr-item:hover .qr-code {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.qr-item p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
    text-align: center;
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 18px;
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

/* ========== 响应式设计 ========== */

@media (max-width: 1200px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }

    .nav-links {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-copyright {
        font-size: 12px;
    }

    .social-links {
        gap: 12px;
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .qr-codes {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .qr-code {
        width: 70px;
        height: 70px;
        font-size: 28px;
    }

    .qr-item p {
        font-size: 11px;
    }
}