/* 全局变量 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-gray: #f5f6fa;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --header-height: 80px;
    --container-padding: 20px;
}

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

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    overflow-x: hidden;
}

.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 */
.feature-icon,
.download-icon,
.case-icon {
    font-size: 40px;
    margin-bottom: 20px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-gray);
    border-radius: 50%;
    color: var(--secondary-color);
    transition: var(--transition);
}

.feature-card:hover .feature-icon,
.download-card:hover .download-icon,
.case-card:hover .case-icon {
    background-color: var(--secondary-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;
}

.contact-info span,
.server-status span {
    margin-right: 20px;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

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

.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;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.position {
    color: #666;
    font-size: 14px;
}

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

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

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

/* 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;
}

/* 产品介绍 */
.product-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 20px;
}

.feature-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 下载区域 */
.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.download-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.download-card h3 {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 20px;
}

.download-card p {
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

.download-button {
    display: inline-block;
    background-color: var(--secondary-color);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 15px;
    transition: var(--transition);
    width: 100%;
    text-align: center;
}

.download-button:hover {
    background-color: #2980b9;
}

/* 使用场景 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.case-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.case-card h3 {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 20px;
}

.case-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 套餐价格 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.pricing-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

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

.featured-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: #fff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
}

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

.price {
    font-size: 36px;
    color: var(--primary-color);
    margin: 15px 0;
    line-height: 1;
}

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

.price-save {
    color: var(--accent-color);
    font-size: 14px;
    margin-top: 5px;
}

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

.pricing-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.pricing-features i {
    color: var(--secondary-color);
    margin-right: 10px;
}

.pricing-button {
    display: inline-block;
    background-color: var(--secondary-color);
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    transition: var(--transition);
    width: 100%;
    text-align: center;
}

.pricing-button:hover {
    background-color: #2980b9;
}

/* 用户评价 */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.testimonial-content {
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-info h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.author-info span {
    color: #666;
    font-size: 14px;
}

.rating {
    color: #f1c40f;
}

/* 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);
}

/* 友情链接 */
.friend-links {
    background-color: var(--light-gray);
    padding: 30px 0;
}

.links-content {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.links-content li {
    list-style: none;
}

.links-content a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.links-content a:hover {
    color: var(--secondary-color);
}

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

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

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

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

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

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

@media screen and (max-width: 768px) {
    /* 小屏设备优化 */
    .top-bar {
        display: none;
    }

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

    .search-box {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: #fff;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-wrapper {
        padding: 0;
    }

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

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

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

    .product-features,
    .cases-grid,
    .pricing-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .feature-card,
    .case-card,
    .pricing-card,
    .download-card {
        padding: 20px;
    }

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

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

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

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

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

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

    .feature-icon,
    .download-icon,
    .case-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }

    .pricing-card {
        padding: 15px;
    }

    .price {
        font-size: 24px;
    }

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

    .testimonial-card {
        padding: 15px;
    }

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

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

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

/* 移动端菜单按钮样式 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

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

.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);
}

/* 触摸设备优化 */
@media (hover: none) {
    .feature-card:hover,
    .case-card:hover,
    .pricing-card:hover,
    .download-card:hover {
        transform: none;
    }

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

    .pricing-button:hover,
    .download-button:hover {
        transform: none;
    }
}

/* 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,
    .pricing-button,
    .download-button,
    .social-links {
        display: none;
    }

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

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

    a {
        text-decoration: underline;
    }
}