/* nav-footer.css - Navigation and Footer Styles */
/* 导航栏专用样式 */
.nav-main {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.nav-logo {
    font-size: 28px;
    font-weight: 800;
    color: #1a56db;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo span {
    color: #2ecc71;
}

.nav-logo-icon {
    font-size: 24px;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 10px;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    padding: 12px 18px;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover {
    color: #1a56db;
    background-color: rgba(26, 86, 219, 0.05);
}

.nav-link i {
    font-size: 14px;
    transition: transform 0.3s;
}

.nav-item:hover .nav-link i {
    transform: rotate(180deg);
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 240px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    padding: 10px 0;
}

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

.nav-dropdown-columns {
    /*display: flex;*/
    gap: 0;
}

.nav-dropdown-column {
    flex: 1;
    min-width: 200px;
}

.nav-dropdown-column:not(:last-child) {
    border-right: 1px solid #f0f0f0;
}

.nav-dropdown-link {
    display: block;
    padding: 12px 20px;
    color: #555;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.nav-dropdown-link:hover {
    color: #1a56db;
    background-color: rgba(26, 86, 219, 0.05);
}

.nav-dropdown-title {
    padding: 15px 20px 10px;
    font-weight: 700;
    color: #1a1a1a;
    font-size: 16px;
    border-bottom: 2px solid #1a56db;
    margin: 0 20px 10px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-cta {
    background: linear-gradient(135deg, #1a56db, #2ecc71);
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    color: white;
    box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
}

.nav-mobile-toggle {
    display: none !important;
    background: none;
    border: none;
    font-size: 24px;
    color: #333;
    cursor: pointer;
    z-index: 1001;
}

/* 移动端优化样式 */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: 80px 20px 20px;
        gap: 0;
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 9999 !important;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-item {
        width: 100%;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav-link {
        padding: 16px 0;
        justify-content: space-between;
        border-radius: 0;
    }
    
    .nav-dropdown {
        position: static;
        background: #f8f9fa;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        width: 100%;
        border-radius: 0;
        padding: 0;
        margin-top: 0;
    }
    
    .nav-dropdown.active {
        display: block;
    }
    
    .nav-dropdown-columns {
        flex-direction: column;
    }
    
    .nav-dropdown-column:not(:last-child) {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }
    
    .nav-dropdown-link {
        padding: 14px 20px;
        border-bottom: 1px solid #e8e8e8;
    }
    
    .nav-dropdown-title {
        margin: 0;
        padding: 16px 20px;
        background: #e8f4ff;
    }
    
    .nav-mobile-toggle {
        display: block !important; /* 移动端显示 */
        background: none;
        border: none;
        font-size: 24px;
        color: #333;
        cursor: pointer;
        z-index: 99999;
        padding: 10px;
        margin-left: 10px;
    }
    
    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
    }
    
    .nav-overlay.active {
        display: block !important;
    }
}

/* 页脚专用样式 */
.footer-main {
    background: linear-gradient(135deg, #0a192f 0%, #172a45 100%);
    color: white;
    padding: 80px 0 30px;
    position: relative;
}

.footer-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #1a56db, #2ecc71);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-logo {
    font-size: 32px;
    font-weight: 800;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo span {
    color: #2ecc71;
}

.footer-description {
    color: #ccc;
    line-height: 1.6;
    max-width: 400px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
}

.footer-social-link:hover {
    background: #1a56db;
    transform: translateY(-3px);
}

.footer-col h3 {
    font-size: 20px;
    margin-bottom: 25px;
    color: white;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(to right, #1a56db, #2ecc71);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-links a:hover {
    color: #2ecc71;
}

.footer-links i {
    color: #1a56db;
    width: 16px;
}

.footer-contact {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-contact li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.footer-contact i {
    color: #2ecc71;
    margin-top: 4px;
    flex-shrink: 0;
}

.footer-contact span {
    color: #ccc;
    line-height: 1.5;
}

.footer-newsletter {
    margin-top: 20px;
}

.footer-newsletter p {
    color: #ccc;
    margin-bottom: 15px;
}

.footer-newsletter-form {
    display: flex;
    gap: 10px;
}

.footer-newsletter-input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 14px;
}

.footer-newsletter-input::placeholder {
    color: #999;
}

.footer-newsletter-btn {
    background: linear-gradient(135deg, #1a56db, #2ecc71);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.footer-newsletter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.4);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
    font-size: 14px;
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.footer-legal a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-legal a:hover {
    color: #2ecc71;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px 30px;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-newsletter-form {
        flex-direction: column;
    }
}