/* ====================================
   现代科技风页脚样式
   ==================================== */

.inet-footer {
    position: relative;
    background: linear-gradient(135deg, 
        rgba(15, 23, 42, 0.95) 0%, 
        rgba(30, 41, 59, 0.9) 50%, 
        rgba(15, 23, 42, 0.95) 100%);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-glass);
    padding: var(--space-xl) 0 var(--space-lg) 0;
    margin-top: var(--space-3xl);
    overflow: hidden;
    min-height: 200px;
    max-height: 250px;
}

.inet-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--primary-blue-light), 
        var(--secondary-blue), 
        var(--primary-blue-light), 
        transparent);
    animation: borderFlow 3s ease-in-out infinite;
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    position: relative;
    z-index: 2;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1fr;
    gap: var(--space-xl);
    align-items: start;
    margin-bottom: var(--space-lg);
}

/* Brand Section */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    filter: brightness(1.1) contrast(1.1);
    transition: all var(--transition-normal);
}

.footer-logo:hover {
    filter: brightness(1.3) contrast(1.2);
    transform: scale(1.05);
}

.footer-company-name {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(45deg, var(--primary-blue-light), var(--secondary-blue));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(66, 153, 225, 0.3);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: 0 0 var(--space-md) 0;
    opacity: 0.8;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(66, 153, 225, 0.1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.footer-social-link:hover {
    background: rgba(66, 153, 225, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

.footer-social-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%) invert(60%) sepia(87%) saturate(1048%) hue-rotate(185deg) brightness(96%) contrast(94%);
    transition: all var(--transition-normal);
}

.footer-social-link:hover .footer-social-icon {
    filter: brightness(0) saturate(100%) invert(60%) sepia(87%) saturate(1048%) hue-rotate(185deg) brightness(110%) contrast(94%);
    transform: scale(1.1);
}

/* Contact Section */
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-section-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin: 0 0 var(--space-sm) 0;
    position: relative;
    text-align: left;
    padding-left: 0;
}

.footer-section-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), transparent);
}

.footer-contact-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: flex-start;
    margin-left: -32px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--text-sm);
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.footer-contact-item:hover {
    color: var(--primary-blue-light);
    background: rgba(66, 153, 225, 0.05);
    transform: translateX(4px);
}

.footer-contact-text {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.footer-contact-text a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-contact-text a:hover {
    color: var(--primary-blue-light);
}

.footer-contact-separator {
    color: var(--border-glass);
    opacity: 0.5;
    margin: 0 var(--space-xs);
}

.footer-eu-label {
    color: var(--primary-blue-light);
    font-size: 0.85em;
    font-weight: 500;
    opacity: 0.8;
}

.footer-contact-icon {
    width: 16px;
    height: 16px;
    filter: brightness(0.8);
    transition: all var(--transition-fast);
}

.footer-contact-item:hover .footer-contact-icon {
    filter: brightness(1.2);
    transform: scale(1.1);
}

/* Footer WhatsApp QR Code */
.footer-whatsapp-item {
    position: relative !important;
}

.footer-whatsapp-qr {
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-glass-primary);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    min-width: 120px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-large);
}

.footer-whatsapp-qr.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-8px);
}

.footer-whatsapp-qr::before {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--border-glass);
}

.footer-qr-image {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-xs);
    object-fit: cover;
}

.footer-qr-text {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
}

/* Links Section */
.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
}

.footer-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-start;
}

.footer-nav li a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--text-sm);
    padding: var(--space-xs) var(--space-sm) var(--space-xs) 0;
    transition: all var(--transition-fast);
    position: relative;
    border-radius: var(--radius-sm);
    display: inline-block;
    background: linear-gradient(135deg, 
        rgba(66, 153, 225, 0) 0%, 
        rgba(66, 153, 225, 0.05) 100%);
    border: 1px solid transparent;
}

.footer-nav li a::before {
    content: '→';
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-blue-light);
    opacity: 0;
    transition: all var(--transition-fast);
    font-size: var(--text-xs);
}

.footer-nav li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-blue-light);
    transition: width var(--transition-fast);
}

.footer-nav li a:hover {
    color: var(--primary-blue-light);
    padding-left: var(--space-md);
    background: linear-gradient(135deg, 
        rgba(66, 153, 225, 0.05) 0%, 
        rgba(66, 153, 225, 0.1) 100%);
    border-color: rgba(66, 153, 225, 0.2);
    transform: translateX(2px);
}

.footer-nav li a:hover::before {
    opacity: 1;
    left: var(--space-xs);
}

.footer-nav li a:hover::after {
    width: 100%;
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid var(--border-glass);
    padding-top: var(--space-md);
    text-align: center;
}

.copyright {
    font-size: var(--text-xs);
    color: var(--text-gray);
    margin: 0;
    opacity: 0.7;
}

.company-name {
    color: var(--primary-blue-light);
    font-weight: 500;
}

/* Starry Background Effects */
.footer-stars {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 1;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-blue-light);
    border-radius: 50%;
    opacity: 0;
    animation: starTwinkle 4s ease-in-out infinite;
}

.star:nth-child(1) {
    top: 20%;
    left: 15%;
    animation-delay: 0s;
}

.star:nth-child(2) {
    top: 60%;
    left: 80%;
    animation-delay: 1s;
}

.star:nth-child(3) {
    top: 30%;
    left: 60%;
    animation-delay: 2s;
}

.star:nth-child(4) {
    top: 80%;
    left: 30%;
    animation-delay: 3s;
}

.star:nth-child(5) {
    top: 40%;
    left: 90%;
    animation-delay: 0.5s;
}

/* Animations */
@keyframes borderFlow {
    0%, 100% {
        transform: translateX(-100%);
        opacity: 0;
    }
    50% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes starTwinkle {
    0%, 100% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.2);
    }
}

@media (max-width: 768px) {
    .inet-footer {
        padding: var(--space-lg) 0 var(--space-md) 0;
        margin-top: var(--space-xl);
        min-height: auto;
        max-height: none;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        text-align: center;
    }
    
    .footer-brand {
        align-items: center;
    }
    
    .footer-contact,
    .footer-links {
        align-items: center;
    }
    
    .footer-contact-items {
        align-items: center;
        margin-left: 0px;
    }
    
    .footer-nav {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-md);
    }
    
    .footer-section-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-whatsapp-qr {
        top: -100px;
        left: 50%;
        transform: translateX(-50%);
        min-width: 100px;
    }
    
    .footer-whatsapp-qr.show {
        transform: translateX(-50%) translateY(-8px);
    }
    
    .footer-qr-image {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 480px) {
    .footer-main {
        gap: var(--space-sm);
    }
    
    .footer-company-name {
        font-size: var(--text-lg);
    }
    
    .footer-tagline {
        font-size: var(--text-xs);
    }
    
    .footer-contact-item {
        flex-direction: column;
        gap: var(--space-xs);
        text-align: center;
    }
    
    .footer-contact-text {
        flex-direction: column;
        gap: var(--space-xxs);
    }
    
    .footer-contact-separator {
        display: none;
    }
    
    .footer-eu-label {
        display: inline-block;
        margin-right: var(--space-xxs);
    }
    
    .footer-nav {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .footer-whatsapp-qr {
        top: -90px;
        padding: var(--space-sm);
        min-width: 80px;
    }
    
    .footer-qr-image {
        width: 50px;
        height: 50px;
    }
    
    .footer-qr-text {
        font-size: 10px;
    }
}