/* Facebook 蓝白配色方案 */
:root {
    --facebook-blue: #1877f2;
    --facebook-blue-dark: #166fe5;
    --facebook-blue-light: #e7f3ff;
    --white: #ffffff;
    --gray-light: #f0f2f5;
    --gray-medium: #dadde1;
    --gray-dark: #8a8d91;
    --text-primary: #1c1e21;
    --text-secondary: #65676b;
    --success: #42b72a;
    --warning: #f7b928;
    --danger: #fa383e;
    --shadow: 0 2px 4px rgba(0, 0, 0, .1), 0 8px 16px rgba(0, 0, 0, .1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--gray-light);
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--facebook-blue);
}

.nav-logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--facebook-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--facebook-blue);
    transition: var(--transition);
}

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

.language-switcher {
    display: flex;
    background: var(--gray-light);
    border-radius: 20px;
    padding: 2px;
}

.lang-btn {
    background: none;
    border: none;
    padding: 8px 16px;
    border-radius: 18px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.lang-btn.active {
    background: var(--facebook-blue);
    color: var(--white);
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, var(--facebook-blue) 0%, var(--facebook-blue-dark) 100%);
    color: var(--white);
    padding: 80px 0 60px;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-text {
    padding-right: 20px;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: bold;
    margin-bottom: 15px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.5;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
}

.feature-item i {
    font-size: 1.3rem;
    color: var(--facebook-blue-light);
}

.hero-actions {
    display: flex;
    gap: 15px;
}

.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--white);
    color: var(--facebook-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--facebook-blue);
}

/* 轮播图样式 */
.hero-carousel {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
    display: contents;
}

.carousel-container {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    background: var(--white);
}

.carousel-slides {
    position: relative;
    height: 464px;
    overflow: hidden;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.carousel-controls {
    position: absolute;
    bottom: 15px;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 0 20px;
}

.carousel-prev,
.carousel-next {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--facebook-blue);
    font-size: 0.9rem;
}

.carousel-prev:hover,
.carousel-next:hover {
    background: var(--white);
    transform: scale(1.1);
}

.carousel-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--white);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--white);
}

/* 产品截图展示 */
.screenshots {
    padding: 100px 0;
    background: var(--gray-light);
}

.screenshots h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.screenshot-item {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.screenshot-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.screenshot-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    background: linear-gradient(45deg, var(--facebook-blue-light), var(--gray-light));
    border-bottom: 1px solid var(--gray-medium);
}

.screenshot-caption {
    padding: 25px;
}

.screenshot-caption h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.screenshot-caption p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.screenshots-actions {
    text-align: center;
}

/* 功能卡片图片 */
.feature-image {
    margin-top: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--gray-medium);
}

.feature-image img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    display: block;
    background: linear-gradient(45deg, var(--facebook-blue-light), var(--gray-light));
    transition: var(--transition);
}

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

/* 产品亮点 */
.features {
    padding: 100px 0;
    background: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--gray-light);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--gray-medium);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--facebook-blue);
}

.feature-card i {
    font-size: 3rem;
    color: var(--facebook-blue);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 广告功能 */
.ad-features {
    padding: 100px 0;
    background: var(--white);
}

.ad-features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 商城功能 */
.shop-features {
    padding: 100px 0;
    background: var(--gray-light);
}

.shop-features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* 平台特性 */
.platform {
    padding: 100px 0;
    background: var(--white);
}

.platform h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.platform-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--gray-light);
    padding: 30px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border-left: 4px solid var(--facebook-blue);
}

.platform-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.platform-icon {
    flex-shrink: 0;
    background: var(--facebook-blue);
    color: var(--white);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.platform-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.platform-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 套件内容 */
.suite {
    padding: 100px 0;
    background: var(--gray-light);
}

.suite h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.suite-content {
    display: grid;
    gap: 40px;
}

.suite-item {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.suite-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.suite-item h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--facebook-blue);
}

.suite-item ul {
    list-style: none;
}

.suite-item li {
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-medium);
    position: relative;
    padding-left: 20px;
}

.suite-item li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.suite-item li:last-child {
    border-bottom: none;
}

/* 核心优势 */
.advantages {
    padding: 100px 0;
    background: var(--white);
}

.advantages h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.advantage-card {
    background: var(--facebook-blue-light);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    border-left: 4px solid var(--facebook-blue);
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 应用场景 */
.use-cases {
    padding: 100px 0;
    background: var(--gray-light);
}

.use-cases h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.case-item {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: var(--white);
}

.download h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.download-card {
    background: var(--gray-light);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--gray-medium);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--facebook-blue);
}

.download-card i {
    font-size: 3rem;
    color: var(--facebook-blue);
    margin-bottom: 20px;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.btn-download {
    background: var(--facebook-blue);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-download:hover {
    background: var(--facebook-blue-dark);
    transform: translateY(-2px);
}

/* 联系信息 */
.contact {
    padding: 100px 0;
    background: var(--gray-light);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.contact-item {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
}

.contact-item i {
    font-size: 2.5rem;
    color: var(--facebook-blue);
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.contact-link {
    color: var(--facebook-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--gray-light);
    color: var(--facebook-blue);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 999;
        gap: 0;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-link {
        padding: 15px 0;
        border-bottom: 1px solid var(--gray-medium);
        width: 100%;
        text-align: center;
        font-size: 1.1rem;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .language-switcher {
        margin-top: 20px;
        justify-content: center;
        width: 100%;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 0 50px;
        min-height: auto;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text {
        padding-right: 0;
        order: 2;
    }
    
    .hero-carousel {
        order: 1;
        max-width: 320px;
        margin: 0 auto 30px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
        line-height: 1.3;
        margin-bottom: 15px;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 25px;
        line-height: 1.4;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 25px;
    }
    
    .feature-item {
        font-size: 0.95rem;
        justify-content: center;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 260px;
        text-align: center;
        padding: 12px 18px;
        font-size: 1rem;
    }
    
    .carousel-slides {
        height: 200px;
    }
    
    .carousel-controls {
        bottom: 10px;
        gap: 10px;
    }
    
    .carousel-prev,
    .carousel-next {
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }
    
    .dot {
        width: 6px;
        height: 6px;
    }
    
    .features-grid,
    .advantages-grid,
    .cases-grid,
    .download-grid,
    .contact-info {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .platform-item {
        flex-direction: column;
        text-align: center;
        padding: 25px 20px;
    }
    
    .platform-icon {
        margin-bottom: 15px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .feature-card,
    .advantage-card,
    .download-card {
        padding: 30px 20px;
    }
    
    .suite-item {
        padding: 30px 20px;
    }
    
    .contact-item {
        padding: 30px 20px;
        flex-direction: column;
        text-align: center;
    }
    
    .cases-grid {
        gap: 15px;
    }
    
    .case-item {
        padding: 15px 10px;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 15px;
        height: 60px;
    }
    
    .nav-logo {
        font-size: 1.3rem;
    }
    
    .nav-logo i {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 100px 0 50px;
    }
    
    .hero h1 {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 25px;
    }
    
    .features h2,
    .suite h2,
    .advantages h2,
    .use-cases h2,
    .download h2,
    .contact h2 {
        font-size: 1.8rem;
        margin-bottom: 40px;
    }
    
    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }
    
    .feature-card i,
    .download-card i {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }
    
    .feature-card h3,
    .download-card h3 {
        font-size: 1.3rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 12px 18px;
        font-size: 1rem;
    }
    
    .contact-item i {
        font-size: 2rem;
        margin-bottom: 10px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover::after {
        width: 0;
    }
    
    .feature-card:hover,
    .advantage-card:hover,
    .download-card:hover,
    .case-item:hover {
        transform: none;
    }
    
    .btn-primary:hover,
    .btn-secondary:hover,
    .btn-download:hover {
        transform: none;
    }
    
    /* 触摸设备专用样式 */
    .btn-primary,
    .btn-secondary,
    .btn-download,
    .nav-link {
        min-height: 44px; /* iOS推荐的最小触摸尺寸 */
        line-height: 44px;
    }
    
    .feature-card,
    .advantage-card,
    .download-card {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
}

/* 防止移动端缩放 */
@media (max-width: 768px) {
    input, select, textarea {
        font-size: 16px; /* 防止iOS缩放 */
    }
}

/* 移动端滚动优化 */
@media (max-width: 768px) {
    html {
        -webkit-overflow-scrolling: touch;
    }
    
    body {
        position: relative;
        height: 100%;
        overflow-x: hidden;
    }
    
    /* 移动端滚动条隐藏 */
    ::-webkit-scrollbar {
        width: 0;
        background: transparent;
    }
}

/* 移动端图片加载优化 */
@media (max-width: 768px) {
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    
    .hero-image img {
        border-radius: 15px;
        margin: 0 auto;
    }
}

/* 移动端字体渲染优化 */
@media (max-width: 768px) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
    }
    
    h1, h2, h3, h4, h5, h6 {
        font-weight: 600;
        letter-spacing: -0.02em;
    }
}

/* 移动端性能优化 */
@media (max-width: 768px) {
    .feature-card,
    .advantage-card,
    .download-card,
    .case-item {
        will-change: transform;
        transform: translateZ(0);
    }
    
    /* 减少动画性能消耗 */
    .feature-card:hover,
    .advantage-card:hover,
    .download-card:hover {
        transform: none;
        transition: none;
    }
    
    /* 优化移动端滚动性能 */
    .hero,
    .ad-features,
    .shop-features,
    .platform,
    .suite,
    .advantages,
    .use-cases,
    .download,
    .contact {
        will-change: transform;
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    /* 移动端按钮点击反馈优化 */
    .btn-primary,
    .btn-secondary,
    .btn-download {
        -webkit-tap-highlight-color: rgba(24, 119, 242, 0.1);
        user-select: none;
        -webkit-user-select: none;
    }
    
    /* 移动端图片优化 */
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
}

/* 移动端安全区域适配 */
@supports(padding: max(0px)) {
    @media (max-width: 768px) {
        .container {
            padding-left: max(15px, env(safe-area-inset-left));
            padding-right: max(15px, env(safe-area-inset-right));
        }
        
        .nav-container {
            padding-left: max(15px, env(safe-area-inset-left));
            padding-right: max(15px, env(safe-area-inset-right));
        }
        
        .hero {
            padding-left: max(15px, env(safe-area-inset-left));
            padding-right: max(15px, env(safe-area-inset-right));
        }
    }
}

/* 移动端图片展示优化 */
@media (max-width: 768px) {
    .screenshots {
        padding: 60px 0;
    }
    
    .screenshots h2 {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        margin-bottom: 30px;
    }
    
    .screenshot-item img {
        height: 200px;
    }
    
    .screenshot-caption {
        padding: 20px;
    }
    
    .screenshot-caption h3 {
        font-size: 1.2rem;
    }
    
    .feature-image {
        margin-top: 15px;
    }
    
    .feature-image img {
        height: 120px;
    }
    
    /* 移动端触摸优化 */
    .screenshot-item {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
    
    .feature-image {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
}

@media (max-width: 480px) {
    .screenshots {
        padding: 50px 0;
    }
    
    .screenshots h2 {
        font-size: 1.8rem;
    }
    
    .screenshot-item img {
        height: 180px;
    }
    
    .screenshot-caption {
        padding: 15px;
    }
    
    .feature-image img {
        height: 100px;
    }
}

/* 图片模态框样式 */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    animation: fadeIn 0.3s ease forwards;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.lightbox-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    color: var(--white);
    cursor: pointer;
    z-index: 2001;
    background: rgba(0, 0, 0, 0.5);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.lightbox-close:hover {
    background: rgba(0, 0, 0, 0.7);
    transform: scale(1.1);
}

.lightbox img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox-caption {
    padding: 15px 20px;
    background: var(--white);
    color: var(--text-primary);
    text-align: center;
    font-weight: 500;
    border-top: 1px solid var(--gray-medium);
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* 图片加载动画 */
img.loading {
    animation: pulse 1.5s infinite;
}

img.loaded {
    animation: fadeInScale 0.5s ease;
}

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 0.8; }
    100% { opacity: 0.6; }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

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

.feature-card,
.advantage-card,
.download-card {
    animation: fadeInUp 0.6s ease-out;
}