/* 网站底部样式 */
.site-footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    position: relative;
    margin-top: 60px;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px 0;
}

/* 主要内容区域 */
.footer-main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: #06a7f2;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
    position: relative;
}

.footer-links a:hover {
    color: #06a7f2;
    transform: translateX(5px);
}

.footer-links a::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 1px;
    background: #06a7f2;
    transition: width 0.3s ease;
}

.footer-links a:hover::before {
    width: 10px;
}

/* 联系信息 */
.contact-info {
    margin-top: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.contact-item i {
    margin-right: 12px;
    width: 16px;
    color: #06a7f2;
    font-size: 16px;
}

/* 社交媒体和订阅 */
.footer-social {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
}

.social-links h4,
.newsletter h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

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

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-icon:hover {
    background: #06a7f2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(6, 167, 242, 0.3);
}

.social-icon i {
    font-size: 18px;
}

/* 订阅表单 */
.newsletter-form {
    display: flex;
    gap: 10px;
    max-width: 300px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 14px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter-form input:focus {
    outline: none;
    border-color: #06a7f2;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px rgba(6, 167, 242, 0.2);
}

.newsletter-form button {
    padding: 12px 20px;
    background: #06a7f2;
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.newsletter-form button:hover {
    background: #0588c7;
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(6, 167, 242, 0.3);
}

/* 底部版权信息 */
.footer-bottom {
    background:#000;
    padding: 40px 0;
    /* border-top: 1px solid rgba(255, 255, 255, 0.1); */
}

.footer-bottom-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright p {
    margin: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-legal {
    display: flex;
    gap: 20px;
}

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

.footer-legal a:hover {
    color: #06a7f2;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .footer-container {
        padding: 40px 15px 0;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-social {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
        max-width: 100%;
    }
    
    .newsletter-form input {
        border-radius: 8px;
    }
    
    .newsletter-form button {
        border-radius: 8px;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .footer-legal {
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .footer-container {
        padding: 30px 10px 0;
    }
    
    .footer-main {
        gap: 25px;
    }
    
    .footer-section {
        margin-bottom: 25px;
    }
    
    .footer-title {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .footer-links a {
        font-size: 13px;
    }
    
    .contact-item {
        font-size: 13px;
        margin-bottom: 12px;
    }
    
    .social-icons {
        gap: 10px;
    }
    
    .social-icon {
        width: 35px;
        height: 35px;
    }
    
    .social-icon i {
        font-size: 16px;
    }
    
    .newsletter-form input,
    .newsletter-form button {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    .footer-legal {
        gap: 15px;
    }
    
    .footer-legal a {
        font-size: 13px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.footer-section {
    animation: fadeInUp 0.6s ease-out;
}

.footer-section:nth-child(1) { animation-delay: 0.1s; }
.footer-section:nth-child(2) { animation-delay: 0.2s; }
.footer-section:nth-child(3) { animation-delay: 0.3s; }
.footer-section:nth-child(4) { animation-delay: 0.4s; }


@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 16px;
    }
}