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

:root {
    /* 颜色系统 */
    --primary: #FD4B68;
    --primary-light: #FF758F;
    --primary-dark: #D93654;
    --secondary: #47B2FF;
    --secondary-light: #85CCFF;
    --secondary-dark: #1D91E7;
    --text-dark: #333333;
    --text-medium: #666666;
    --text-light: #999999;
    --bg-light: #FFFFFF;
    --bg-off: #F8F9FA;
    --bg-accent: #FFF0F3;
    
    /* 尺寸和间距 */
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* 圆角 */
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
}

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* 公共布局和组件 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    color: var(--text-dark);
}

.section-title::after {
    content: "";
    position: absolute;
    width: 60px;
    height: 3px;
    background-color: var(--primary);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(253, 75, 104, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(253, 75, 104, 0.3);
}

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

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

.btn-download {
    background-color: var(--primary);
    color: white;
    padding: 0.75rem 2rem;
    box-shadow: 0 4px 12px rgba(253, 75, 104, 0.2);
}

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

.btn-github {
    background-color: #333;
    color: white;
    padding: 0.75rem 2rem;
}

.btn-github:hover {
    background-color: #000;
    transform: translateY(-2px);
}

/* 顶部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-list {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    padding: 0.5rem;
}

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

/* 英雄区域 */
.hero {
    padding: 120px 0 var(--spacing-xl);
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-off) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -10%;
    right: -5%;
    width: 300px;
    height: 300px;
    background-color: var(--bg-accent);
    border-radius: 50%;
    z-index: 0;
    opacity: 0.5;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -15%;
    left: -10%;
    width: 450px;
    height: 450px;
    background-color: var(--bg-accent);
    border-radius: 50%;
    z-index: 0;
    opacity: 0.5;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-medium);
    margin-bottom: var(--spacing-sm);
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.hero-btns {
    display: flex;
    gap: var(--spacing-sm);
}

.hero-image {
    flex: 0 0 45%;
    position: relative;
}

.device-mockup {
    max-width: 85%;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    transform: rotate(-5deg);
    transition: all 0.5s ease;
}

.device-mockup:hover {
    transform: rotate(0deg) scale(1.02);
}

/* 功能特色区 */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-off);
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

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

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--bg-accent);
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
    font-size: 2rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.feature-desc {
    color: var(--text-light);
    line-height: 1.5;
}

/* 应用截图区 */
.screenshots {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-light);
}

.screenshots-slider {
    display: flex;
    overflow-x: auto;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    scroll-behavior: smooth;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.screenshots-slider::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.screenshot-item {
    flex: 0 0 auto;
    width: 280px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.screenshot-item:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: var(--spacing-md);
    gap: var(--spacing-sm);
}

.slider-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background-color: var(--bg-off);
    color: var(--text-medium);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.slider-dots {
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--bg-off);
    cursor: pointer;
}

.dot.active {
    background-color: var(--primary);
}

/* 下载区域 */
.download {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-off);
}

.download-desc {
    text-align: center;
    color: var(--text-medium);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

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

.download-option {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    max-width: 300px;
    transition: all 0.3s ease;
}

.download-option:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.platform-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.platform-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.platform-desc {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.qrcode {
    width: 150px;
    height: 150px;
    margin: 0 auto;
    border: 2px solid var(--bg-off);
    border-radius: var(--radius-sm);
}

/* 号召行动区 */
.cta {
    background-color: var(--primary);
    color: white;
    padding: var(--spacing-lg) 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -150px;
    right: -150px;
    z-index: 0;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.cta-desc {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background-color: var(--bg-off);
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.logo-img-sm {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.logo-text-sm {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.footer-desc {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

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

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-medium);
    font-size: 1.25rem;
    transition: all 0.2s ease;
}

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

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.footer-nav li, .contact-list li {
    margin-bottom: 0.5rem;
}

.footer-nav a, .contact-list a {
    color: var(--text-light);
}

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

.contact-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.copyright {
    color: var(--text-light);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--text-light);
    font-size: 0.875rem;
}

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

/* 响应式 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-image {
        flex: 0 0 40%;
    }
}

@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-image {
        margin-top: var(--spacing-md);
    }
    
    .device-mockup {
        transform: rotate(0);
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 576px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }
    
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    .nav-list {
        gap: var(--spacing-sm);
    }
    
    .hero {
        padding: 100px 0 var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.75rem;
    }
}