/* 全局样式 */
:root {
    /* 主色调 - iOS 暗黑主题风格 */
    --primary-color: #0A84FF;
    --primary-hover: #007AFF;
    --secondary-color: #64D2FF;
    --accent-color: #5E5CE6;
    
    /* 背景色 */
    --bg-dark: #000000;
    --bg-card: #1C1C1E;
    --bg-elevated: #2C2C2E;
    
    /* 文字颜色 */
    --text-primary: #FFFFFF;
    --text-secondary: #98989F;
    --text-tertiary: #636366;
    
    /* 边框颜色 */
    --border-color: #38383A;
    
    /* 其他颜色 */
    --success-color: #32D74B;
    --warning-color: #FF9F0A;
    --danger-color: #FF453A;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* 动画时间 */
    --transition-fast: 0.15s;
    --transition-normal: 0.25s;
    --transition-slow: 0.35s;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

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

ul, ol {
    list-style: none;
}

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

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    min-width: 120px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
}

/* 章节标题 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background-color: rgba(28, 28, 30, 0.8);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo span {
    color: var(--primary-color);
}

.main-nav ul {
    display: flex;
}

.main-nav li {
    margin-left: var(--spacing-xl);
}

.main-nav a {
    color: var(--text-secondary);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.main-nav a:hover, 
.main-nav a.active {
    color: var(--text-primary);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
}

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

/* 英雄区域 */
.hero {
    padding-top: 160px;
    padding-bottom: var(--spacing-xxl);
    position: relative;
}

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

.hero-text {
    max-width: 550px;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-image {
    position: relative;
    width: 100%;
    max-width: 450px;
    z-index: 1;
}

/* 设备模型 */
.device-mockup {
    position: relative;
    width: 100%;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-frame {
    position: relative;
    width: 250px;
    height: 500px;
    background: var(--bg-elevated);
    border-radius: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    padding: 10px;
}

.device-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    overflow: hidden;
}

.device-screen i {
    font-size: 5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.device-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.screen-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.screen-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    height: 100px;
    width: 100px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.screen-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--spacing-md);
}

.hero-blob {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(10, 132, 255, 0.2) 0%, rgba(94, 92, 230, 0.1) 50%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    z-index: -1;
    filter: blur(40px);
}

/* 特色功能区域 */
.features {
    padding: var(--spacing-xxl) 0;
    background-color: rgba(28, 28, 30, 0.5);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--border-color);
    text-align: center;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.feature-icon i {
    color: white;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

/* 应用展示区域 */
.app-showcase {
    padding: var(--spacing-xxl) 0;
}

.app-showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xxl);
}

.app-showcase-grid.reverse {
    direction: rtl;
}

.app-showcase-grid.reverse .showcase-text {
    direction: ltr;
}

.app-showcase-grid.reverse .showcase-image {
    direction: ltr;
}

.showcase-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.showcase-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.feature-list li {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.feature-list i {
    color: var(--success-color);
    margin-right: var(--spacing-sm);
}

.showcase-image {
    position: relative;
    padding: var(--spacing-lg);
}

.showcase-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(94, 92, 230, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: var(--radius-lg);
    z-index: -1;
}

/* 用户评价区域 */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background-color: rgba(28, 28, 30, 0.5);
}

.testimonial-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background-color: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.testimonial-rating {
    margin-bottom: var(--spacing-md);
}

.testimonial-rating i {
    color: var(--warning-color);
    margin-right: 2px;
}

.testimonial-text {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.testimonial-author {
    display: flex;
    align-items: center;
}

/* 用户头像样式 */
.avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-sm);
}

.avatar i {
    font-size: 1.5rem;
}

.author-info h4 {
    margin-bottom: 2px;
}

.author-info p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* 下载区域 */
.download {
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    min-width: 180px;
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.download-btn .btn-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.download-btn .version-info {
    margin-top: 6px;
    font-size: 0.65rem;
    opacity: 0.7;
}

.download-btn:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.download-btn i {
    font-size: 1.8rem;
    margin-right: var(--spacing-md);
}

.download-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    width: 100%;
}

.download-text span {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.download-text strong {
    font-size: 0.9rem;
}

.download-btn .version-info-container {
    margin-top: 6px;
}

.download-btn.ios:hover i {
    color: #FFFFFF;
}

.download-btn.android:hover i {
    color: var(--success-color);
}

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

.android-download.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 下载按钮样式 */
.download-text-small {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin: 0 auto;
    font-size: 0.9rem;
    font-weight: 500;
}

.download-text-small span {
    display: block;
    margin-bottom: 4px;
}

.version-info-container {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 2px;
}

.version-info {
    display: block;
    font-size: 0.65rem;
    opacity: 0.8;
    color: var(--text-primary);
    font-weight: 300;
    margin-top: 4px;
}

/* 二维码样式 */
.qr-code {
    display: inline-block;
    margin-top: var(--spacing-lg);
}

.qr-code-box {
    width: 150px;
    height: 150px;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-code-box i {
    font-size: 5rem;
    color: var(--bg-dark);
}

.qr-code p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 页脚 */
.footer {
    padding-top: var(--spacing-xxl);
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: flex;
    justify-content: center;
    text-align: center;
}

.footer-brand {
    margin-bottom: var(--spacing-lg);
    max-width: 400px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin: var(--spacing-md) 0 var(--spacing-lg);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-elevated);
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

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

.footer-links h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: var(--spacing-xs);
}

.footer-bottom {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* 媒体查询 - 响应式设计 */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }

    .hero-text h1 {
        font-size: 3rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .device-mockup {
        height: 400px;
    }
    
    .device-frame {
        width: 200px;
        height: 400px;
    }
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        margin-bottom: var(--spacing-lg);
    }

    .hero-buttons {
        justify-content: center;
    }
    
    /* 在手机端隐藏英雄区域的图片设备模型 */
    .hero-image {
        display: none;
    }
    
    .hero-text {
        max-width: 100%;
        margin-bottom: 0;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .download-options {
        flex-direction: column;
        align-items: center;
    }

    .testimonial-slider {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--bg-card);
        padding: var(--spacing-lg);
        transition: left var(--transition-normal);
        overflow-y: auto;
    }

    .main-nav.active {
        left: 0;
    }

    .main-nav ul {
        flex-direction: column;
    }

    .main-nav li {
        margin: 0;
        margin-bottom: var(--spacing-lg);
    }

    .main-nav a {
        display: block;
        font-size: 1.2rem;
    }
    
    .device-mockup {
        height: 350px;
    }
    
    .device-frame {
        width: 175px;
        height: 350px;
    }

    /* 在手机端隐藏底部下载部分 */
    #download {
        display: none;
    }
    
    /* 调整手机端下载按钮样式 */
    .hero-buttons {
        gap: var(--spacing-md);
        margin-top: var(--spacing-xl);
    }
    
    .btn-content {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        width: 100% !important;
    }
    
    .download-text-small {
        font-size: 0.85rem !important;
    }
    
    .version-info {
        font-size: 0.6rem !important;
        margin-top: 3px !important;
    }
    
    /* 完全覆盖可能的内联样式 */
    .btn .download-text-small,
    .android-download .download-text-small,
    .apple-download .download-text-small {
        display: flex !important;
        flex-direction: column !important;
    }
    
    .apple-download i, 
    .android-download i {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .hero-text h1 {
        font-size: 2.5rem;
    }

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

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

    .showcase-text h3 {
        font-size: 1.5rem;
    }
    
    /* 确保在最小屏幕上版本信息也能正确显示 */
    .download-text-small {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
    }
    
    .version-info {
        display: block !important;
        margin-top: 2px !important;
        width: 100% !important;
    }
    
    .device-mockup {
        height: 300px;
    }
    
    .device-frame {
        width: 150px;
        height: 300px;
    }
}

/* 图片懒加载样式 */
img[data-src] {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

img[data-src][src] {
    opacity: 1;
}

/* 动画效果 */
@keyframes float {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0);
    }
}

.device-frame {
    animation: float 6s ease-in-out infinite;
}

/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    z-index: 10000;
    transition: width 0.1s ease;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--bg-card);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}