/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --text-primary: #1D1D1F;
    --text-secondary: #6E6E73;
    --text-light: #86868B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --bg-tertiary: #FAFAFA;
    --border-color: #E5E5E7;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    --gradient-hero: linear-gradient(135deg, #007AFF15 0%, #5856D615 100%);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

.download-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 4px 16px var(--shadow-medium);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

.apple-icon,
.download-icon {
    width: 28px;
    height: 28px;
}

.download-icon {
    transition: var(--transition);
}

.download-secondary:hover .download-icon {
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    padding: 16px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    box-shadow: 0 8px 32px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none;
    padding: 16px 32px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 16px;
    background: var(--bg-primary);
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-light);
}

/* 应用预览 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-showcase {
    position: relative;
    max-width: 600px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-product-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-large);
    box-shadow: 0 20px 60px var(--shadow-medium);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.hero-product-img:hover {
    transform: scale(1.02);
    box-shadow: 0 24px 80px var(--shadow-medium);
}

/* 图片轮播展示 */
.image-carousel {
    padding: 80px 0;
    background: var(--bg-primary);
}

.image-carousel-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.image-carousel-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-large);
    box-shadow: 0 16px 48px var(--shadow-light);
    background: var(--bg-tertiary);
    aspect-ratio: 16 / 10;
}

.image-carousel-slides {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
}

.image-carousel-slide {
    min-width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

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

.image-carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.image-carousel-slide.active img {
    transform: scale(1.02);
}

/* 图片轮播控制器 */
.image-carousel-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 10;
    padding: 0 20px;
}

.image-carousel-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: all;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: scale(0.8);
}

.image-carousel-wrapper:hover .image-carousel-btn {
    opacity: 1;
    transform: scale(1);
}

.image-carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.image-carousel-btn svg {
    width: 20px;
    height: 20px;
}

.image-carousel-prev {
    left: 20px;
}

.image-carousel-next {
    right: 20px;
}

/* 图片轮播指示器 */
.image-carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}

.image-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.image-indicator.active {
    background: var(--primary-color);
    transform: scale(1.3);
}

.image-indicator:hover {
    background: var(--primary-color);
    opacity: 0.7;
    transform: scale(1.15);
}

/* 图片轮播动画效果 */
@keyframes imageSlideInFromRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes imageSlideInFromLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.image-carousel-slide.slide-in-right {
    animation: imageSlideInFromRight 0.6s ease;
}

.image-carousel-slide.slide-in-left {
    animation: imageSlideInFromLeft 0.6s ease;
}

/* 功能特性 */
.features {
    padding: 120px 0;
    background: var(--bg-primary);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--bg-primary);
    padding: 40px;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px var(--shadow-light);
    border-color: rgba(0, 122, 255, 0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 24px;
    display: block;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 产品展示轮播图 */
.product-carousel {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.carousel-header {
    text-align: center;
    margin-bottom: 60px;
}

.carousel-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.carousel-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.carousel-container {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
}

.carousel-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-large);
    box-shadow: 0 20px 80px var(--shadow-medium);
}

.carousel-slides {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

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

.slide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 500px;
    background: var(--bg-primary);
}

.slide-image {
    position: relative;
    overflow: hidden;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.carousel-slide.active .slide-image img {
    transform: scale(1.02);
}

.slide-text {
    padding: 60px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--bg-primary);
}

.slide-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    line-height: 1.2;
}

.slide-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.slide-features {
    list-style: none;
    margin: 0;
    padding: 0;
}

.slide-features li {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 轮播控制器 */
.carousel-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 10;
}

.carousel-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: all;
    transition: var(--transition);
    box-shadow: 0 4px 20px var(--shadow-medium);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 6px 24px var(--shadow-medium);
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

.carousel-prev {
    left: -25px;
}

.carousel-next {
    right: -25px;
}

/* 轮播指示器 */
.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--primary-color);
    transform: scale(1.2);
}

.indicator:hover {
    background: var(--primary-color);
    opacity: 0.7;
}

/* 轮播动画效果 */
@keyframes slideInFromRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInFromLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.carousel-slide.slide-in-right {
    animation: slideInFromRight 0.6s ease;
}

.carousel-slide.slide-in-left {
    animation: slideInFromLeft 0.6s ease;
}

/* 下载区域 */
.download {
    padding: 120px 0;
    background: var(--gradient-hero);
    text-align: center;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.download-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.download-primary,
.download-secondary {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    min-width: 200px;
}

.download-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 32px rgba(0, 122, 255, 0.3);
}

.download-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.4);
}

.download-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.download-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 122, 255, 0.1), transparent);
    transition: left 0.6s;
}

.download-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-light);
}

.download-secondary:hover::before {
    left: 100%;
}

.download-text {
    font-size: 16px;
    font-weight: 600;
}

.download-subtext {
    font-size: 12px;
    opacity: 0.7;
}

.system-requirements {
    max-width: 400px;
    margin: 0 auto;
    text-align: left;
}

.requirements-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.requirements-list {
    list-style: none;
    font-size: 14px;
    color: var(--text-secondary);
}

.requirements-list li {
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
}

.requirements-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .slide-content {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .carousel-prev {
        left: 10px;
    }
    
    .carousel-next {
        right: 10px;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-actions {
        gap: 20px;
    }
    
    .nav-link {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }
    
    .features,
    .product-carousel,
    .download,
    .image-carousel {
        padding: 80px 0;
    }
    
    .image-carousel-wrapper {
        aspect-ratio: 16 / 12;
    }
    
    .image-carousel-controls {
        padding: 0 10px;
    }
    
    .image-carousel-btn {
        width: 40px;
        height: 40px;
    }
    
    .image-carousel-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .image-carousel-prev {
        left: 10px;
    }
    
    .image-carousel-next {
        right: 10px;
    }
    
    .image-carousel-indicators {
        margin-top: 20px;
        gap: 8px;
    }
    
    .image-indicator {
        width: 8px;
        height: 8px;
    }
    
    .slide-content {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .slide-image {
        order: -1;
        min-height: 250px;
    }
    
    .slide-text {
        padding: 40px 32px;
    }
    
    .slide-title {
        font-size: 1.75rem;
    }
    
    .slide-description {
        font-size: 16px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
    }
    
    .carousel-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: 32px 24px;
    }
    
    .hero-product-img {
        max-width: 100%;
        border-radius: var(--border-radius);
    }
    
    .download-actions {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    
    .download-primary,
    .download-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .footer-links {
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card {
        padding: 24px 16px;
    }
    
    .code-content {
        padding: 16px;
        font-size: 12px;
    }
}

/* 滚动行为优化 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background: rgba(0, 122, 255, 0.2);
}

/* 焦点样式 */
.btn-primary:focus,
.btn-secondary:focus,
.download-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

.hero-content,
.feature-card,
.showcase-content {
    animation: fadeInUp 0.6s ease-out;
}