.nva {
    background: linear-gradient(to right, #8e9eab, #eef2f3);
    padding: 15px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nvalink {
    display: flex;
    justify-content: center;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btli {
    margin: 0 15px;
}

.btli a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 30px;
    transition: all 0.3s ease;
    position: relative;
}

.btli a:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #e74c3c;
}

.btli a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 3px;
    background: #e74c3c;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.btli a:hover::after {
    width: 70%;
}

.footer {
    background: linear-gradient(135deg, #1a2a4c 0%, #2c3e50 100%);
    color: #fff;
    padding: 40px 0 0;
    font-family: 'Microsoft YaHei', sans-serif;
    border-top: 3px solid #d4af37;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: "";
    position: absolute;
    top: -40px;
    left: 0;
    right: 0;
    height: 40px;
    background-size: cover;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-column {
    margin-bottom: 30px;
}

.footer-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
    color: #d4af37;
}

.footer-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: #d4af37;
}

.footer-desc {
    margin-bottom: 15px;
    line-height: 1.6;
    opacity: 0.9;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

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

.social-links a:hover {
    background: #d4af37;
    transform: translateY(-3px);
}

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

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

.footer-links a {
    color: #e0e0e0;
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
    padding: 5px 0;
}

.footer-links a:hover {
    color: #d4af37;
    padding-left: 5px;
}

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

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
    line-height: 1.5;
}

.contact-info i {
    color: #d4af37;
    margin-right: 10px;
    margin-top: 5px;
    min-width: 20px;
}

.newsletter-form {
    display: flex;
    margin-top: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 4px 0 0 4px;
    font-size: 14px;
    outline: none;
}

.newsletter-form button {
    background: #d4af37;
    color: #1a2a4c;
    border: none;
    padding: 0 20px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 0 4px 4px 0;
    transition: background 0.3s ease;
}

.newsletter-form button:hover {
    background: #c19b2e;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    margin-top: 40px;
}

.copyright {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 10px;
}

.legal-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.legal-links a {
    color: #aaa;
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.legal-links a:hover {
    color: #d4af37;
}