/* 全局变量 */
:root {
    --primary-color: #1e88e5;
    --secondary-color: #1976d2;
    --accent-color: #2196f3;
    --text-color: #333;
    --light-gray: #f5f6fa;
    --border-color: #e3f2fd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --header-height: 80px;
    --container-padding: 20px;
    --mobile-header-height: 60px;
    --section-padding: 80px;
    --mobile-section-padding: 40px;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent; /* 移除移动端点击高亮 */
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%; /* 防止iOS自动调整字体大小 */
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased; /* 优化字体渲染 */
    -moz-osx-font-smoothing: grayscale;
}

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

/* 图标样式 */
[class^="icon-"]::before {
    display: inline-block;
    margin-right: 5px;
    vertical-align: middle;
    font-size: 24px;
}

/* Logo样式 */
.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    display: inline-block;
    padding: 5px 0;
}

.logo a {
    text-decoration: none;
}

/* 图标容器样式 */
.intro-icon,
.product-icon,
.solution-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-gray);
    border-radius: 50%;
    margin: 0 auto 20px;
    font-size: 32px;
    color: var(--primary-color);
    transition: var(--transition);
}

.intro-card:hover .intro-icon,
.product-card:hover .product-icon,
.solution-card:hover .solution-icon {
    background-color: var(--primary-color);
    color: #fff;
    transform: scale(1.1);
}

/* 图标定义 */
.icon-phone::before { content: "📞"; }
.icon-email::before { content: "✉️"; }
.icon-server::before { content: "🖥️"; }
.icon-users::before { content: "👥"; }
.icon-search::before { content: "🔍"; }
.icon-shield::before { content: "🛡️"; }
.icon-speed::before { content: "⚡"; }
.icon-globe::before { content: "🌍"; }
.icon-windows::before { content: "🪟"; }
.icon-mac::before { content: "🍎"; }
.icon-ios::before { content: "📱"; }
.icon-android::before { content: "🤖"; }
.icon-gaming::before { content: "🎮"; }
.icon-video::before { content: "🎬"; }
.icon-business::before { content: "💼"; }
.icon-check::before { content: "✓"; }
.icon-weixin::before { content: "💬"; }
.icon-weibo::before { content: "📱"; }
.icon-qq::before { content: "💬"; }

/* 顶部信息栏 */
.top-bar {
    background-color: var(--primary-color);
    color: #fff;
    padding: 8px 0;
    font-size: 14px;
    position: relative;
    z-index: 100;
}

.top-bar-left {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-select select {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
}

.user-actions {
    display: flex;
    gap: 10px;
}

.login-btn,
.register-btn {
    color: #fff;
    text-decoration: none;
    padding: 5px 15px;
    border-radius: 4px;
    transition: var(--transition);
}

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

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

.login-btn:hover,
.register-btn:hover {
    opacity: 0.9;
}

/* 头部导航 */
.header {
    background-color: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 99;
    transition: var(--transition);
}

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

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    flex-wrap: wrap;
    gap: 15px;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--light-gray);
    border-radius: 20px;
    padding: 5px 15px;
    flex: 1;
    max-width: 300px;
}

.search-box input {
    border: none;
    background: none;
    padding: 5px;
    width: 100%;
    outline: none;
    font-size: 14px;
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
    padding: 5px;
    transition: var(--transition);
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    flex-wrap: wrap;
    gap: 15px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 5px 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%;
}

/* 下拉菜单 */
.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: var(--shadow);
    border-radius: 4px;
    padding: 10px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 1000;
}

.nav-item:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu a {
    display: block;
    padding: 8px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.submenu a:hover {
    background-color: var(--light-gray);
    color: var(--primary-color);
}

/* 主要内容区 */
.main-content {
    padding: 40px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 15px;
    line-height: 1.2;
}

.section-subtitle {
    color: #666;
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* 轮播图区域 */
.hero-slider {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-slider::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 25%, transparent 25%),
                linear-gradient(-45deg, rgba(255,255,255,0.1) 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.1) 75%),
                linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.1) 75%);
    background-size: 20px 20px;
    opacity: 0.1;
}

.slider-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.slider-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.slider-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.primary-btn,
.secondary-btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.secondary-btn {
    background-color: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.primary-btn:hover,
.secondary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 公司简介 */
.company-intro {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.intro-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

/* 产品服务 */
.products {
    padding: 80px 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.download-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 20px;
    transition: var(--transition);
}

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

/* 解决方案 */
.solutions {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.solution-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.solution-features {
    list-style: none;
    margin-top: 20px;
    text-align: left;
}

.solution-features li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.solution-features li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* 新闻动态 */
.news {
    padding: 80px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.news-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.news-content h3 {
    margin-bottom: 15px;
    color: var(--text-color);
}

.news-content p {
    color: #666;
    margin-bottom: 15px;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

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

/* 合作伙伴 */
.partners {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
    align-items: center;
}

.partner-card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.partner-name {
    font-weight: 500;
    color: var(--text-color);
}

/* 页脚 */
.footer {
    background-color: var(--primary-color);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

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

.footer-section a:hover {
    color: var(--secondary-color);
}

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

.social-link {
    font-size: 24px;
    color: #fff;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计优化 */
@media screen and (max-width: 992px) {
    /* 平板设备优化 */
    .container {
        padding: 0 20px;
    }

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

    .section-header h2 {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .hero-slider {
        padding: 60px 0;
    }

    .slider-content h1 {
        font-size: 36px;
    }

    .slider-content p {
        font-size: 18px;
    }

    .product-grid,
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .partner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .ads-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .top-bar {
        padding: 5px 0;
    }

    .top-bar-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .contact-info,
    .server-status {
        display: flex;
        flex-direction: column;
        gap: 5px;
    }

    .top-bar-right {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media screen and (max-width: 768px) {
    /* 小屏设备优化 */
    :root {
        --section-padding: var(--mobile-section-padding);
    }

    .top-bar {
        display: none;
    }

    .header-top {
        padding: 10px 0;
    }

    .search-box {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: var(--mobile-header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--mobile-header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        touch-action: pan-y;
        z-index: 999;
    }

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

    .nav-wrapper {
        padding: 0;
        height: 100%;
    }

    .nav-links {
        flex-direction: column;
        padding: 0;
        height: 100%;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        padding: 15px 20px;
        display: block;
        font-size: 16px;
    }

    .product-grid,
    .solution-grid,
    .partner-grid,
    .ads-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .intro-card,
    .product-card,
    .solution-card,
    .partner-card,
    .news-card,
    .ad-section {
        padding: 20px;
        margin-bottom: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

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

    .footer-section h4 {
        font-size: 18px;
        margin-bottom: 15px;
    }

    .footer-section ul li {
        margin-bottom: 10px;
    }

    .footer-section ul li a {
        font-size: 14px;
    }
}

@media screen and (max-width: 480px) {
    /* 手机设备优化 */
    .container {
        padding: 0 15px;
    }

    .logo-text {
        font-size: 20px;
    }

    .slider-content h1 {
        font-size: 28px;
    }

    .slider-content p {
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 14px;
        line-height: 1.5;
    }

    .intro-icon,
    .product-icon,
    .solution-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }

    .pricing-card {
        padding: 15px;
    }

    .price {
        font-size: 24px;
    }

    .pricing-features li {
        font-size: 14px;
    }

    .news-card {
        padding: 15px;
    }

    .news-content h3 {
        font-size: 16px;
    }

    .news-content p {
        font-size: 14px;
    }

    .footer-section h4 {
        font-size: 16px;
    }

    .footer-section ul li a {
        font-size: 14px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .primary-btn,
    .secondary-btn {
        width: 100%;
        text-align: center;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .intro-card:hover,
    .product-card:hover,
    .solution-card:hover,
    .partner-card:hover,
    .news-card:hover {
        transform: none;
    }

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

    .download-btn:hover,
    .primary-btn:hover,
    .secondary-btn:hover {
        transform: none;
    }

    /* 添加触摸反馈 */
    .nav-links a:active,
    .download-btn:active,
    .primary-btn:active,
    .secondary-btn:active {
        opacity: 0.7;
    }
}

/* 高分辨率屏幕优化 */
@media screen and (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* 打印样式优化 */
@media print {
    .header,
    .footer,
    .top-bar,
    .menu-toggle,
    .search-box,
    .download-btn,
    .primary-btn,
    .secondary-btn,
    .social-links,
    .bottom-ads {
        display: none;
    }

    .container {
        width: 100%;
        max-width: none;
        padding: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    a {
        text-decoration: underline;
    }
}

/* 性能优化 */
/* 硬件加速 */
.header,
.main-nav,
.intro-card,
.product-card,
.solution-card,
.partner-card,
.news-card,
.pricing-card,
.contact-item {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* 滚动优化 */
html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

@media screen and (max-width: 768px) {
    html {
        scroll-padding-top: var(--mobile-header-height);
    }
}

/* 图片优化 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 动画性能优化 */
@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) {
    .nav-item:hover .submenu {
        display: none;
    }

    .nav-item.active .submenu {
        display: block;
    }

    .primary-btn:hover,
    .secondary-btn:hover,
    .download-btn:hover {
        transform: none;
    }

    /* 添加触摸反馈 */
    .nav-links a:active,
    .submenu a:active {
        background-color: var(--light-gray);
    }

    .menu-toggle:active {
        opacity: 0.7;
    }
}

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

    .main-nav {
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
}

/* 优化移动端字体大小 */
@media screen and (max-width: 480px) {
    body {
        font-size: 14px;
    }

    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 18px; }
    h4 { font-size: 16px; }
}

/* 优化移动端间距 */
@media screen and (max-width: 768px) {
    .section-header {
        margin-bottom: 30px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid,
    .partner-grid,
    .news-grid {
        gap: 15px;
    }
}

/* 优化移动端动画性能 */
@media screen and (max-width: 768px) {
    .header,
    .footer,
    .main-nav {
        transform: translateZ(0);
        backface-visibility: hidden;
    }

    .intro-card,
    .product-card,
    .solution-card,
    .partner-card,
    .news-card {
        transform: translateZ(0);
        backface-visibility: hidden;
    }
}

/* 添加滚动时的头部样式 */
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 优化移动端触摸体验 */
@media (hover: none) {
    .nav-links a:active,
    .submenu a:active {
        background-color: var(--light-gray);
    }

    .menu-toggle:active {
        opacity: 0.7;
    }
}

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

    .main-nav {
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
}

/* 头部导航响应式优化 */
@media screen and (max-width: 992px) {
    .header-top {
        padding: 10px 0;
    }

    .search-box {
        max-width: 250px;
    }
}

@media screen and (max-width: 768px) {
    .header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
    }

    .header-top {
        padding: 10px 0;
        justify-content: space-between;
    }

    .logo {
        flex: 1;
        max-width: 150px;
    }

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

    .search-box {
        display: none;
    }

    .menu-toggle {
        display: block;
        margin-left: 15px;
    }

    .main-nav {
        position: fixed;
        top: var(--mobile-header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--mobile-header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        touch-action: pan-y;
        z-index: 999;
    }

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

    .nav-wrapper {
        padding: 0;
        height: 100%;
    }

    .nav-links {
        flex-direction: column;
        padding: 0;
        height: 100%;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        padding: 15px 20px;
        display: block;
        font-size: 16px;
    }

    /* 移动端子菜单优化 */
    .submenu {
        position: static;
        box-shadow: none;
        background: var(--light-gray);
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }

    .nav-item.active .submenu {
        display: block;
    }

    .submenu a {
        padding: 12px 20px 12px 40px;
        font-size: 14px;
    }

    /* 移动端菜单按钮动画优化 */
    .menu-toggle {
        width: 24px;
        height: 20px;
        padding: 0;
    }

    .menu-toggle span {
        height: 2px;
        margin: 0;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

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

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}

@media screen and (max-width: 480px) {
    .header-top {
        padding: 8px 0;
    }

    .logo {
        max-width: 120px;
    }

    .menu-toggle {
        width: 20px;
        height: 16px;
    }

    .nav-links a {
        padding: 12px 15px;
        font-size: 15px;
    }

    .submenu a {
        padding: 10px 15px 10px 35px;
        font-size: 13px;
    }
}

/* 价格套餐 */
.pricing {
    padding: var(--section-padding) 0;
    background-color: var(--light-gray);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 500px;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
}

.pricing-header {
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 24px;
    color: var(--text-color);
    margin-bottom: 15px;
}

.price {
    font-size: 36px;
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 10px;
}

.price span {
    font-size: 16px;
    color: #666;
}

.price-save {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    margin-top: 10px;
}

.pricing-features {
    list-style: none;
    margin: 30px 0;
    text-align: left;
    flex-grow: 1;
}

.pricing-features li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
    color: #666;
}

.pricing-features li i {
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.contact-item {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.contact-item i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.contact-item h3 {
    font-size: 18px;
    color: var(--text-color);
    margin-bottom: 10px;
}

.contact-item p {
    color: #666;
    font-size: 16px;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    transition: var(--transition);
}

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

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(30, 136, 229, 0.1);
}

/* 响应式调整 */
@media screen and (max-width: 992px) {
    .pricing-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

@media screen and (max-width: 768px) {
    .pricing-card {
        min-height: auto;
    }

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

    .contact-form {
        padding: 30px;
    }
}

@media screen and (max-width: 480px) {
    .pricing-header h3 {
        font-size: 20px;
    }

    .price {
        font-size: 28px;
    }

    .contact-item {
        padding: 20px;
    }

    .contact-item i {
        font-size: 24px;
    }

    .contact-item h3 {
        font-size: 16px;
    }

    .contact-item p {
        font-size: 14px;
    }
}

/* 移动端优先的响应式设计 */
@media (max-width: 768px) {
    /* 顶部信息栏 */
    .top-bar {
        display: none; /* 移动端隐藏顶部信息栏 */
    }

    /* 头部导航 */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .header-top {
        padding: 10px 0;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .search-box {
        display: none; /* 移动端隐藏搜索框 */
    }

    /* 导航菜单 */
    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        height: calc(100vh - 60px);
        overflow-y: auto;
    }

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

    .nav-links {
        flex-direction: column;
        gap: 15px;
    }

    .nav-item {
        width: 100%;
    }

    .submenu {
        position: static;
        background: #f8f9fa;
        padding: 10px;
        margin-top: 5px;
        display: none;
    }

    .nav-item.active .submenu {
        display: block;
    }

    /* 主要内容区域 */
    .main-content {
        margin-top: 60px; /* 为固定导航栏留出空间 */
    }

    /* 轮播图区域 */
    .hero-slider {
        padding: 40px 0;
    }

    .slider-content h1 {
        font-size: 1.8rem;
        line-height: 1.3;
    }

    .slider-content p {
        font-size: 1rem;
        line-height: 1.5;
    }

    /* 公司简介 */
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 产品服务 */
    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 解决方案 */
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 价格套餐 */
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .pricing-card {
        max-width: 100%;
    }

    /* 新闻动态 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 合作伙伴 */
    .partner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    /* 联系我们 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* 页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-section {
        text-align: center;
    }

    /* 按钮样式优化 */
    .primary-btn,
    .secondary-btn,
    .download-btn {
        width: 100%;
        padding: 12px 20px;
        font-size: 1rem;
    }

    /* 表单优化 */
    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 12px;
    }

    /* 间距调整 */
    .section-header {
        margin-bottom: 30px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    /* 卡片样式优化 */
    .product-card,
    .solution-card,
    .pricing-card,
    .news-card,
    .partner-card {
        padding: 20px;
    }

    /* 图标大小调整 */
    .intro-icon,
    .product-icon,
    .solution-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 992px) {
    .container {
        padding: 0 20px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .hero-slider {
        padding: 60px 0;
    }

    .slider-content h1 {
        font-size: 2.2rem;
    }

    .slider-content p {
        font-size: 1.1rem;
    }
}

/* 桌面设备适配 */
@media (min-width: 993px) {
    .container {
        max-width: 1200px;
        padding: 0 30px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid,
    .pricing-grid,
    .news-grid,
    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .hero-slider {
        padding: 80px 0;
    }

    .slider-content h1 {
        font-size: 2.5rem;
    }

    .slider-content p {
        font-size: 1.2rem;
    }
}

/* 大屏幕适配 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid,
    .pricing-grid,
    .news-grid,
    .partner-grid {
        gap: 40px;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #4a90e2;
        --secondary-color: #2c3e50;
        --text-color: #ffffff;
        --bg-color: #1a1a1a;
        --card-bg: #2d2d2d;
    }

    body {
        background-color: var(--bg-color);
        color: var(--text-color);
    }

    .header,
    .main-nav,
    .product-card,
    .solution-card,
    .pricing-card,
    .news-card,
    .partner-card,
    .footer {
        background-color: var(--card-bg);
    }
}

/* 内容区域响应式优化 */
@media (max-width: 768px) {
    /* 轮播图区域 */
    .hero-slider {
        padding: 40px 0;
    }

    .slider-content h1 {
        font-size: 1.8rem;
        line-height: 1.3;
    }

    .slider-content p {
        font-size: 1rem;
        line-height: 1.5;
    }

    /* 网格布局优化 */
    .intro-grid,
    .product-grid,
    .solution-grid,
    .pricing-grid,
    .news-grid,
    .partner-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 卡片样式优化 */
    .intro-card,
    .product-card,
    .solution-card,
    .pricing-card,
    .news-card,
    .partner-card {
        padding: 20px;
        margin-bottom: 15px;
    }

    /* 按钮样式优化 */
    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .primary-btn,
    .secondary-btn,
    .download-btn {
        width: 100%;
        padding: 12px 20px;
        text-align: center;
    }

    /* 表单优化 */
    .contact-form {
        padding: 20px;
    }

    .form-group input,
    .form-group textarea {
        padding: 12px;
        font-size: 16px;
    }
}

/* 平板设备内容优化 */
@media (min-width: 769px) and (max-width: 992px) {
    .intro-grid,
    .product-grid,
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .hero-slider {
        padding: 60px 0;
    }

    .slider-content h1 {
        font-size: 2.2rem;
    }

    .slider-content p {
        font-size: 1.1rem;
    }
}

/* 桌面设备内容优化 */
@media (min-width: 993px) {
    .container {
        max-width: 1200px;
        padding: 0 30px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid,
    .pricing-grid,
    .news-grid,
    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .hero-slider {
        padding: 80px 0;
    }

    .slider-content h1 {
        font-size: 2.5rem;
    }

    .slider-content p {
        font-size: 1.2rem;
    }
}

/* 大屏幕内容优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }

    .intro-grid,
    .product-grid,
    .solution-grid,
    .pricing-grid,
    .news-grid,
    .partner-grid {
        gap: 40px;
    }
}