/* 全局变量 */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background: #ffffff;
    --section-bg: #f3f4f6;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --header-height: 70px;
    --container-padding: 1rem;
    --section-padding: 4rem;
    --mobile-header-height: 60px;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

/* 顶部信息栏 */
.top-bar {
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    gap: 1rem;
}

.server-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
}

.user-count {
    margin-left: 1rem;
}

.language-select select {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
}

.user-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.login-btn,
.register-btn {
    color: #fff;
    text-decoration: none;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    transition: var(--transition);
}

.login-btn {
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.register-btn {
    background-color: #fff;
    color: var(--primary-color);
}

/* 头部导航 */
.header {
    background-color: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* 主要内容区 */
.main-content {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.section-header p {
    color: #6b7280;
    font-size: 1.125rem;
}

/* 新闻资讯 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.news-card {
    background: #fff;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.news-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 1.5rem;
}

.news-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.news-content p {
    color: #6b7280;
    margin-bottom: 1rem;
}

.news-meta {
    display: flex;
    gap: 1rem;
    color: #9ca3af;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more::after {
    content: '→';
    transition: var(--transition);
}

.read-more:hover::after {
    transform: translateX(5px);
}

/* 科技前沿 */
.tech-section {
    background-color: var(--light-gray);
    padding: var(--section-padding) 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-card {
    background: #fff;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.tech-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    background-color: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.tech-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.tech-card p {
    color: #6b7280;
}

/* VPN服务部分优化 */
.vpn-section {
    background-color: var(--section-bg);
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

.vpn-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(30, 64, 175, 0.1) 100%);
    z-index: 0;
}

.vpn-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.vpn-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.vpn-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.vpn-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
}

.vpn-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.vpn-card p {
    color: var(--light-text);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.vpn-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.vpn-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

/* 下载部分优化 */
.download-section {
    padding: var(--section-padding) 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.download-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.download-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    background: var(--section-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.download-card p {
    color: var(--light-text);
    margin-bottom: 2rem;
}

.download-btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.download-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1rem;
    color: #6b7280;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #6b7280;
}

/* 联系我们 */
.contact-section {
    background-color: var(--light-gray);
    padding: var(--section-padding) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.contact-item {
    background: #fff;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.contact-item p {
    color: #6b7280;
}

.contact-form {
    background: #fff;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-btn {
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.25rem;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.submit-btn:hover {
    background-color: var(--secondary-color);
}

/* 页脚 */
.footer {
    background-color: var(--text-color);
    color: #fff;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: #fff;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
}

/* 返回顶部按钮 */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 100;
}

.scroll-top.show {
    opacity: 1;
}

.scroll-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container {
        padding: 0 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: var(--mobile-header-height);
        --section-padding: 3rem 1rem;
    }

    .container {
        padding: 0 1rem;
    }

    /* 顶部信息栏 */
    .top-bar {
        display: none;
    }

    /* 头部导航 */
    .header {
        height: var(--header-height);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .header-content {
        padding: 0 1rem;
        height: 100%;
    }

    .logo-text {
        font-size: 1.25rem;
        z-index: 1002;
    }

    /* 移动端菜单按钮 */
    .menu-toggle {
        display: flex;
        z-index: 1002;
        position: relative;
        width: 28px;
        height: 24px;
    }

    .menu-toggle span {
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: var(--text-color);
        transition: var(--transition);
    }

    .menu-toggle span:nth-child(1) {
        top: 0;
    }

    .menu-toggle span:nth-child(2) {
        top: 50%;
        transform: translateY(-50%);
    }

    .menu-toggle span:nth-child(3) {
        bottom: 0;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(11px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-11px) rotate(-45deg);
    }

    /* 移动端导航菜单 */
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--background);
        padding: 1rem;
        flex-direction: column;
        gap: 0;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 1001;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links a {
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        font-size: 1.1rem;
        display: block;
        width: 100%;
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-links a::after {
        display: none;
    }

    /* 主要内容区域 */
    .main-content {
        margin-top: var(--header-height);
        padding: var(--section-padding);
    }

    /* 防止内容在菜单打开时滚动 */
    body.menu-open {
        overflow: hidden;
    }

    .section-header {
        margin-bottom: 2rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .section-header p {
        font-size: 0.875rem;
    }

    /* 卡片布局 */
    .news-grid,
    .tech-grid,
    .vpn-grid,
    .download-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .news-card,
    .tech-card,
    .vpn-card,
    .download-card {
        margin-bottom: 1rem;
    }

    /* 关于我们 */
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 联系我们 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

    /* 返回顶部按钮 */
    .scroll-top {
        bottom: 1rem;
        right: 1rem;
    }

    .vpn-section,
    .download-section {
        padding: 3rem 1rem;
    }

    .vpn-grid,
    .download-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .vpn-card,
    .download-card {
        padding: 2rem;
    }

    .vpn-icon,
    .download-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .vpn-card h3,
    .download-card h3 {
        font-size: 1.25rem;
    }
}

@media (min-width: 769px) and (max-width: 992px) {
    .container {
        padding: 0 1.5rem;
    }

    .news-grid,
    .tech-grid,
    .vpn-grid,
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 993px) {
    .container {
        padding: 0 2rem;
    }

    .news-grid,
    .tech-grid,
    .vpn-grid,
    .download-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }

    .news-grid,
    .tech-grid,
    .vpn-grid,
    .download-grid {
        gap: 2rem;
    }
}

/* 暗色模式优化 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #f3f4f6;
        --light-text: #9ca3af;
        --background: #111827;
        --section-bg: #1f2937;
        --border-color: #374151;
    }

    body {
        background-color: #111827;
    }

    .header,
    .news-card,
    .tech-card,
    .vpn-card,
    .download-card,
    .contact-item,
    .contact-form {
        background-color: #1f2937;
    }

    .nav-links {
        background-color: #1f2937;
    }

    .section-header p,
    .news-content p,
    .tech-card p,
    .vpn-card p,
    .download-card p,
    .contact-item p {
        color: #9ca3af;
    }

    .form-group input,
    .form-group textarea {
        background-color: #374151;
        border-color: #4b5563;
        color: #f3f4f6;
    }

    .form-group input:focus,
    .form-group textarea:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }

    .news-card:hover,
    .tech-card:hover,
    .vpn-card:hover,
    .download-card:hover {
        border-color: var(--primary-color);
    }
}

/* 暗色模式下的移动端导航 */
@media (prefers-color-scheme: dark) and (max-width: 768px) {
    .header {
        background: rgba(31, 41, 55, 0.98);
    }

    .nav-links {
        background: var(--background);
    }

    .menu-toggle span {
        background-color: var(--text-color);
    }
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .news-card,
    .tech-card,
    .vpn-card,
    .download-card {
        transition: none;
    }

    .nav-links a:hover,
    .footer-links a:hover {
        color: var(--primary-color);
    }
}

/* 安全区域适配 */
@supports (padding: max(0px)) {
    .header {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }

    .footer {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }
}

/* 通用广告样式 */
.ad-container {
    width: 100%;
    margin: 2rem 0;
    text-align: center;
}

.ad-container iframe {
    max-width: 100%;
    border: none;
}

.ad-container img {
    max-width: 100%;
    height: auto;
}

.ad-container .ad-text {
    margin: 1rem 0;
    color: var(--text-color);
    font-size: 0.875rem;
}

/* 响应式广告样式 */
@media (max-width: 768px) {
    .ad-container {
        margin: 1rem 0;
    }
    
    .ad-container .ad-text {
        font-size: 0.75rem;
    }
}

/* 暗色模式广告样式 */
@media (prefers-color-scheme: dark) {
    .ad-container .ad-text {
        color: #9ca3af;
    }
}

/* 友情链接样式 */
.footer-links {
    margin: 2rem 0;
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

.footer-links ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin: 0;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    background: rgba(255, 255, 255, 0.05);
}

.footer-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

/* 响应式友情链接 */
@media (max-width: 768px) {
    .footer-links {
        margin: 1.5rem 0;
        padding: 1.5rem 0;
    }

    .footer-links h4 {
        font-size: 1.1rem;
        margin-bottom: 1rem;
        text-align: center;
    }

    .footer-links ul {
        justify-content: center;
        gap: 0.5rem;
    }

    .footer-links a {
        padding: 0.4rem 0.8rem;
        font-size: 0.875rem;
    }
}

/* 暗色模式友情链接 */
@media (prefers-color-scheme: dark) {
    .footer-links {
        border-color: rgba(255, 255, 255, 0.05);
    }

    .footer-links a {
        background: rgba(255, 255, 255, 0.03);
    }

    .footer-links a:hover {
        background: rgba(255, 255, 255, 0.05);
    }
}