/* ================================
   专业页脚设计 - 极简主义与深色模式优先
   ================================ */
.footer {
    background: linear-gradient(135deg, var(--primary-brand) 0%, #1e40af 100%);
    color: white;
    margin-top: var(--space-24);
    position: relative;
    overflow: hidden;
    padding: var(--space-8) 0;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="60" height="60" patternUnits="userSpaceOnUse"><path d="m 60 0 l 0 60 M 0 60 l 60 0" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>') repeat;
    opacity: 0.3;
    pointer-events: none;
}

.footer-main {
    display: grid;
    grid-template-columns: 2.2fr 1.3fr 1fr; /* 优化快速链接区域宽度，减少换行问题*/
    gap: var(--space-8); /* 进一步减小间距*/
    padding: var(--space-12) 0; /* 进一步减小内边距 */
    position: relative;
    z-index: 1;
}

/* 品牌区域 */
.footer-brand {
    max-width: 520px; /* 进一步增加最大宽度以匹配图片布局 */
}

.footer-logo {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: white;
    letter-spacing: -0.025em;
}

.footer-description {
    font-size: var(--text-base);
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-8);
    
    /* 优化字体渲染和emoji显示 */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Color Emoji", "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-variant-emoji: normal;
    
    /* 改善emoji与文字的视觉平衡 */
    word-spacing: 0.05em;
    letter-spacing: 0.01em;
}

/* 优化要点列表的间距 */
.footer-description br {
    margin-bottom: 0.2em;
}

/* 增强footer-brand整体视觉效果 */
.footer-brand {
    /* 轻微的文字阴影提升可读性 */
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.footer-stats {
    display: flex;
    gap: var(--space-8);
    margin-top: var(--space-6);
}

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

.stat-number {
    display: block;
    font-size: var(--text-2xl);
    font-weight: 700;
    color: white;
    line-height: 1.2;
    transition: all 0.3s ease;
    min-width: 4rem; /* 保持数字宽度稳定，防止跳动 */
}

.stat-label {
    display: block;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--space-1);
}

/* 链接区域 */
.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 两列等宽布局 */
    gap: var(--space-8);
}

.link-group {
    min-width: 0;
}

.link-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
    position: relative;
    padding-bottom: var(--space-2);
}

.link-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent);
    border-radius: 1px;
}

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

.link-list li {
    margin-bottom: var(--space-3);
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
    display: inline-block;
    position: relative;
}

.footer-link:hover {
    color: white;
    transform: translateX(4px);
}

.footer-link::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: white;
    transition: width var(--transition-fast);
}

.footer-link:hover::before {
    width: 6px;
}

/* 联系信息区域 */
.footer-contact {
    max-width: 300px;
}

.contact-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
    position: relative;
    padding-bottom: var(--space-2);
}

.contact-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent);
    border-radius: 1px;
}

.contact-info {
    margin-bottom: var(--space-8);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.contact-icon {
    font-size: var(--text-lg);
    opacity: 0.8;
}

.contact-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: var(--text-base);
}

.contact-link:hover {
    color: white;
}

.wechat-contact-link {
    cursor: pointer;
}

.wechat-contact-link:hover {
    text-decoration: underline;
}

.contact-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-base);
}

/* 社交媒体 */
.social-links {
    margin-bottom: var(--space-8);
}

.social-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
}

.social-icons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.wechat-link, .douyin-link {
    position: relative;
    cursor: pointer;
}

.social-icon {
    font-size: var(--text-base);
}

.social-label {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* 友情链接 */
.footer-friends {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-8) 0;
    margin-top: var(--space-4);
}

.friends-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
}

.friends-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4) var(--space-8);
}

.friend-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.friend-link:hover {
    color: white;
}

/* 页脚底部 */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-8) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    position: relative;
    z-index: 1;
}

.footer-copyright {
    flex: 1;
    min-width: 200px;
}

.footer-copyright p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-sm);
    line-height: 1.5;
}

.footer-note {
    font-size: var(--text-xs) !important;
    color: rgba(255, 255, 255, 0.5) !important;
    margin-top: var(--space-1) !important;
}

.footer-note a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-note a:hover {
    color: rgba(255, 255, 255, 0.8);
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.legal-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.legal-link:hover {
    color: white;
}

.legal-separator {
    color: rgba(255, 255, 255, 0.3);
    font-size: var(--text-sm);
}

.footer-tech {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.tech-badge {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-1) var(--space-3);
    border-radius: 20px;
    font-size: var(--text-xs);
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 二维码弹窗样式 */
.qrcode-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.qrcode-container {
    background-color: white;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    position: relative;
    max-width: 320px;
    width: 90%;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.close-modal {
    position: absolute;
    top: var(--space-2);
    right: var(--space-4);
    font-size: var(--text-2xl);
    color: var(--gray-600);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.close-modal:hover {
    color: var(--gray-900);
}

.qrcode-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-4);
}

.qrcode-content img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin-bottom: var(--space-4);
}

.qrcode-content p {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

/* 高分辨率优化 */
@media (min-width: 1600px) {
    .footer-main {
        gap: var(--space-20);
        padding: var(--space-24) 0;
    }
    
    .footer-brand {
        max-width: 600px; 
    }
    
    .footer-logo {
        font-size: var(--text-4xl);
    }
    
    .footer-description {
        font-size: var(--text-lg);
        /* 大屏幕上适当增加字间距，提升可读性 */
        letter-spacing: 0.02em;
        word-spacing: 0.08em;
    }
}

@media (min-width: 1920px) {
    .footer-main {
        grid-template-columns: 2.2fr 1.3fr 1fr; /* 保持与主要布局一致的比例 */
        gap: var(--space-16); /* 减小间距 */
        padding: var(--space-20) 0; /* 减小内边距*/
    }
    
    .footer-links {
        gap: var(--space-12); /* 减小菜单组之间的间距 */
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-12);
    }
    
    .footer-contact {
        grid-column: 1 / -1;
        max-width: none;
    }
    
    .footer-links {
        grid-column: 1 / -1;
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        padding: var(--space-16) var(--space-2);
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }
    
    .footer-friends{
        padding: var(--space-8) var(--space-2);
    }
    
    .footer-stats {
        justify-content: space-between;
        gap: var(--space-4);
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-6);
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .newsletter-input {
        margin-bottom: var(--space-2);
    }
}