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

:root {
    /* 颜色变量 */
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --secondary: #64748B;
    --light: #F8FAFC;
    --dark: #0F172A;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;
    
    /* 字体变量 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 间距变量 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角变量 */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    
    /* 阴影变量 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* 文本样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

p {
    margin-bottom: var(--spacing-lg);
    color: var(--gray-600);
}

/* 链接样式 */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* 按钮样式 */
.primary-btn, .secondary-btn, .download-btn, .download-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    outline: none;
    text-decoration: none;
}

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

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

.secondary-btn {
    background-color: transparent;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.secondary-btn:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
    color: var(--gray-900);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
}

.logo svg {
    margin-right: var(--spacing-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.download-btn {
    background-color: var(--primary);
    color: white;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-700);
}

/* 移动端菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: white;
    z-index: 1001;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease;
}

.mobile-menu.open {
    right: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.mobile-nav-links a {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--gray-800);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--gray-200);
}

/* 英雄区样式 */
.hero {
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(79, 70, 229, 0.1), transparent 70%);
    z-index: -1;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3xl);
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.hero-content h1 {
    margin-bottom: var(--spacing-xl);
}

.highlight {
    color: var(--primary);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.btn-icon {
    margin-right: var(--spacing-sm);
}

.compatibility {
    display: flex;
    align-items: center;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

.compatibility svg {
    margin-right: var(--spacing-sm);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.app-preview {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background-color: white;
}

.window-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.window-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red {
    background-color: #FF5F56;
}

.control-dot.yellow {
    background-color: #FFBD2E;
}

.control-dot.green {
    background-color: #27C93F;
}

.window-title {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.app-interface {
    padding: var(--spacing-xl);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-mode {
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drag-area {
    width: 200px;
    height: 80px;
    border: 2px dashed var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(79, 70, 229, 0.05);
}

.drag-text {
    color: var(--primary);
    font-weight: 500;
}

/* 特性区域样式 */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: white;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--gray-600);
}

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

.feature-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background-color: white;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.feature-icon {
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

/* 截图展示样式 */
.screenshots {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.screenshot-item {
    display: flex;
    justify-content: center;
}

.screenshot-card {
    text-align: center;
    max-width: 350px;
}

.screenshot-image {
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.screenshot-image:hover {
    transform: translateY(-5px);
}

.window-frame {
    background-color: white;
}

.window-header-mini {
    display: flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.window-controls-mini {
    display: flex;
    gap: var(--spacing-xs);
}

.control-dot-mini {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.control-dot-mini.red {
    background-color: #FF5F56;
}

.control-dot-mini.yellow {
    background-color: #FFBD2E;
}

.control-dot-mini.green {
    background-color: #27C93F;
}

.mini-interface {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.drag-area-mini {
    width: 150px;
    height: 60px;
    border: 2px dashed var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(79, 70, 229, 0.05);
}

.drag-text-mini {
    color: var(--primary);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.list-interface {
    padding: var(--spacing-lg);
    min-height: 120px;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    background-color: var(--gray-50);
}

.file-icon {
    flex-shrink: 0;
}

.progress-interface {
    padding: var(--spacing-lg);
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-container {
    width: 100%;
    max-width: 200px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

.progress-text {
    text-align: center;
    font-weight: 500;
    color: var(--primary);
}

/* 下载区域样式 */
.download {
    padding: var(--spacing-3xl) 0;
    background-color: var(--primary);
    color: white;
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2xl);
}

.download-info h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.download-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
}

.download-details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
}

.download-button {
    background-color: white;
    color: var(--primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-weight: 600;
    gap: var(--spacing-md);
}

.download-button:hover {
    background-color: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--primary-dark);
}

.button-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.button-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.button-subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* 下载反馈提示样式 */
.download-feedback {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: #10B981;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
}

.download-feedback.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.download-feedback::before {
    content: '✓';
    margin-right: 8px;
    font-weight: bold;
}

/* 常见问题样式 */
.faq {
    padding: var(--spacing-3xl) 0;
    background-color: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background-color: white;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-weight: 500;
}

.faq-question:hover {
    background-color: var(--gray-50);
}

.faq-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: var(--gray-50);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: var(--spacing-lg);
}

/* 页脚样式 */
.footer {
    padding: var(--spacing-2xl) 0;
    background-color: var(--gray-900);
    color: var(--gray-400);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: white;
}

.footer-logo svg {
    margin-right: var(--spacing-sm);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    justify-content: center;
}

.footer-links a {
    color: var(--gray-400);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    font-size: var(--font-size-sm);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }
    
    .hero .container {
        gap: var(--spacing-2xl);
    }
    
    .download-content {
        flex-direction: column;
        text-align: center;
    }
    
    .download-details {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .compatibility {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-3xl: 2rem;
        --spacing-2xl: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .download-details {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card, .screenshot-card, .faq-item {
    animation: fadeIn 0.5s ease-out;
}

.feature-card:nth-child(2) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.4s;
}

.screenshot-card:nth-child(2) {
    animation-delay: 0.2s;
}

.screenshot-card:nth-child(3) {
    animation-delay: 0.4s;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }
.mt-6 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }
.mb-6 { margin-bottom: var(--spacing-2xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }
.p-6 { padding: var(--spacing-2xl); }

--radius-full: 9999px;