/* 快连全新设计 - 现代化亮色主题 */

:root {
    /* 全新色彩系统 */
    --primary: #0066ff;
    --secondary: #00c6ff;
    --accent: #00d9c0;
    --dark: #1a1a1a;
    --light: #ffffff;
    --gray-light: #f5f7fa;
    --gray-medium: #e1e5eb;
    --gray-dark: #8a94a6;
    --success: #00c853;
    --warning: #ff9100;
    --danger: #ff3d00;
    
    /* 简约渐变 */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--accent), #00ffd5);
    --gradient-light: linear-gradient(135deg, #f5f7fa, #ffffff);
    
    /* 现代化阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 102, 255, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 102, 255, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 102, 255, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 102, 255, 0.2);
    
    /* 简约卡片效果 */
    --card-bg: var(--light);
    --card-border: var(--gray-medium);
    --card-radius: 20px;
    
    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.9);
    --glass-blur: blur(10px);
    
    /* 间距系统 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-xxl: 64px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

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

/* 导航栏 - 现代化简约设计 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-medium);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.08);
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 12px 0;
    box-shadow: 0 6px 30px rgba(0, 102, 255, 0.12);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo img {
    height: 42px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

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

.nav-links a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    padding: 6px 0;
    transition: all 0.3s ease;
    font-size: 1.05rem;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.nav-links a:hover {
    color: var(--primary);
    transform: translateY(-2px);
}

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

/* 汉堡菜单按钮（移动端） */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px;
    transition: all 0.3s ease;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger:hover span {
    background: var(--secondary);
}

/* 主要按钮 */
.cta-button {
    background: var(--gradient-primary);
    color: white;
    padding: 16px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.cta-button:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: none;
}

.btn-secondary:hover {
    background: rgba(0, 102, 255, 0.05);
    border-color: var(--secondary);
}

/* 下载页面主按钮 */
.download-main-button {
    padding: 20px 50px;
    font-size: 1.4rem;
    border-radius: 60px;
    box-shadow: var(--shadow-lg);
    animation: pulse 2s infinite;
}

.download-main-button:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

@keyframes pulse {
    0% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 102, 255, 0.6);
    }
    100% {
        box-shadow: var(--shadow-lg);
    }
}

/* 首屏 - 简约现代化设计 */
.hero {
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
    background: var(--gray-light);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-text h2 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    line-height: 1.1;
    color: var(--dark);
    font-weight: 800;
}

.hero-text h2 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.25rem;
    margin-bottom: 32px;
    color: var(--gray-dark);
    max-width: 600px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-top: 40px;
}

.hero-image {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 90%;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.4s ease;
}

.hero-image img:hover {
    transform: scale(1.02);
}

/* 特性区 - 现代化卡片设计 */
.features {
    padding: 100px 0;
    background: var(--light);
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
    color: var(--dark);
    font-weight: 800;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 36px 30px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 22px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.6rem;
    margin-bottom: 16px;
    color: var(--dark);
    font-weight: 700;
}

.feature-card p {
    color: var(--gray-dark);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* 统计数据 - 简约数字展示 */
.stats {
    padding: 80px 0;
    background: var(--gray-light);
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    text-align: center;
}

.stat-item {
    padding: 32px 24px;
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    opacity: 0.8;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--primary);
    transition: all 0.4s ease;
}

.stat-number:hover {
    transform: scale(1.05);
}

.stat-label {
    font-size: 1.1rem;
    color: var(--gray-dark);
    font-weight: 500;
}

/* 平台支持 - 改进网格 */
.platforms {
    padding: 100px 0;
    background: var(--light);
    position: relative;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 28px;
    margin-top: 50px;
}

.platform-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
    transition: transform 0.3s ease;
}

.platform-card:hover .platform-icon {
    transform: scale(1.1);
}

.platform-card h3 {
    margin-bottom: 10px;
    color: var(--dark);
    font-size: 1.4rem;
    font-weight: 700;
}

.platform-card p {
    color: var(--gray-dark);
    margin-bottom: 18px;
    font-size: 0.95rem;
}

/* 评价区 - 简约卡片设计 */
.testimonials {
    padding: 100px 0;
    background: var(--gray-light);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 50px;
}

.testimonial-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 32px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 22px;
    color: var(--dark);
    font-size: 1.1rem;
    line-height: 1.7;
    position: relative;
    padding-left: 24px;
}

.testimonial-text::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -8px;
    font-size: 2.5rem;
    color: var(--primary);
    opacity: 0.4;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.3rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.2);
}

.author-info h4 {
    margin-bottom: 5px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
}

.author-info p {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 下载区 - 简约按钮设计 */
.download-section {
    padding: 100px 0;
    text-align: center;
    background: var(--light);
}

.download-section .section-title {
    margin-bottom: 24px;
}

.download-section > p {
    font-size: 1.2rem;
    color: var(--gray-dark);
    margin-bottom: 50px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--card-bg);
    padding: 30px 20px;
    border-radius: 18px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--card-border);
    width: 180px;
    box-shadow: var(--shadow-sm);
}

.download-btn:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.download-btn i {
    font-size: 3rem;
    margin-bottom: 18px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.3s ease;
}

.download-btn:hover i {
    transform: scale(1.1);
}

.download-btn span {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.download-btn small {
    color: var(--gray-dark);
    font-size: 0.85rem;
}

/* 教程文章区 - 清晰排版 */
.tutorial {
    padding: 100px 0;
    background: var(--gray-light);
}

.tutorial-content {
    background: var(--card-bg);
    border-radius: 22px;
    padding: 48px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.tutorial h2 {
    font-size: 2.4rem;
    margin-bottom: 32px;
    color: var(--dark);
    font-weight: 800;
    text-align: center;
}

.tutorial-text {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--dark);
}

.tutorial-text h3 {
    font-size: 1.6rem;
    margin: 32px 0 16px;
    color: var(--primary);
    font-weight: 700;
    padding-left: 20px;
    position: relative;
}

.tutorial-text h3::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 1.8rem;
}

.tutorial-text ul,
.tutorial-text ol {
    margin: 18px 0 18px 36px;
}

.tutorial-text li {
    margin-bottom: 12px;
    position: relative;
    padding-left: 10px;
}

.tutorial-text ul li::before {
    content: '›';
    position: absolute;
    left: -18px;
    color: var(--primary);
    font-size: 1.3rem;
}

.highlight {
    background: rgba(0, 102, 255, 0.05);
    padding: 24px;
    border-radius: 12px;
    border-left: 5px solid var(--primary);
    margin: 24px 0;
    border: 1px solid rgba(0, 102, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* 页脚 - 现代化亮色设计 */
footer {
    padding: 80px 0 40px;
    background: var(--gray-light);
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--gray-medium);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.3;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    margin-bottom: 60px;
}

.footer-column h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 15px;
    color: var(--dark);
    font-weight: 700;
}

.footer-column h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.footer-column p {
    color: var(--gray-dark);
    line-height: 1.6;
    margin-bottom: 24px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 14px;
}

.footer-links a {
    color: var(--gray-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    padding: 3px 0;
    position: relative;
    padding-left: 20px;
    font-weight: 500;
}

.footer-links a::before {
    content: '→';
    position: absolute;
    left: 0;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    color: var(--primary);
    font-weight: bold;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-links a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-md);
}

.copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--gray-medium);
    color: var(--gray-dark);
    font-size: 0.95rem;
    font-weight: 500;
}

.copyright a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.copyright a:hover {
    text-decoration: underline;
}

/* 加载动画 */
.loader {
    display: inline-block;
    width: 80px;
    height: 80px;
    position: relative;
}

.loader:before,
.loader:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    animation: loaderSpin 2s linear infinite;
}

.loader:after {
    animation-delay: -1s;
}

@keyframes loaderSpin {
    0% { transform: scale(0); opacity: 1; }
    100% { transform: scale(1); opacity: 0; }
}

/* 404页面样式 - 现代化亮色主题 */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    background: var(--gray-light);
}

.error-content {
    max-width: 700px;
    padding: 60px 40px;
    background: var(--light);
    border-radius: 30px;
    border: 1px solid var(--gray-medium);
    box-shadow: var(--shadow-xl);
}

.error-number {
    font-size: 8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    line-height: 1;
}

.error-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark);
    font-weight: 800;
}

.error-message {
    font-size: 1.3rem;
    color: var(--gray-dark);
    margin-bottom: 40px;
    line-height: 1.8;
}

.error-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

/* 下载页面样式 - 现代化亮色主题 */
.download-page {
    padding: 160px 0 100px;
    background: var(--gray-light);
}

.platform-detail {
    margin-top: 80px;
}

.platform-detail-card {
    background: var(--light);
    border-radius: 25px;
    padding: 50px 40px;
    border: 1px solid var(--gray-medium);
    margin-bottom: 40px;
    transition: all 0.4s ease;
    box-shadow: var(--shadow-md);
}

.platform-detail-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.platform-detail-header {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-bottom: 30px;
}

.platform-detail-icon {
    font-size: 4.5rem;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.platform-detail-info h3 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    color: var(--primary);
    font-weight: 800;
}

.platform-detail-info p {
    color: var(--gray-dark);
    font-size: 1.2rem;
    font-weight: 500;
}

.platform-detail-steps {
    margin-top: 35px;
}

.step {
    display: flex;
    gap: 25px;
    margin-bottom: 30px;
    padding: 25px;
    background: var(--gray-light);
    border-radius: 20px;
    border-left: 5px solid var(--primary);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.6rem;
    margin-bottom: 10px;
    color: var(--dark);
    font-weight: 700;
}

.step-content p {
    color: var(--gray-dark);
    line-height: 1.8;
    font-weight: 500;
}

/* 响应式设计 - 增强移动端体验 */
@media (max-width: 1100px) {
    .hero-text h2 {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 900px) {
    header {
        padding: 12px 0;
    }
    
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 30px;
        flex-direction: column;
        gap: 25px;
        text-align: center;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        border-top: 1px solid var(--gray-medium);
        border-bottom: 1px solid var(--gray-medium);
        z-index: 999;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 160px 0 80px;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 50px;
    }
    
    .hero-text {
        padding-right: 0;
    }
    
    .hero-text h2 {
        font-size: 3rem;
    }
    
    .hero-text p {
        font-size: 1.2rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .features-grid,
    .platform-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .tutorial-content {
        padding: 40px 30px;
    }
}

@media (max-width: 600px) {
    .hero-text h2 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .features,
    .platforms,
    .testimonials,
    .tutorial,
    .download-section {
        padding: 80px 0;
    }
    
    .feature-card,
    .platform-card,
    .testimonial-card {
        padding: 30px 25px;
    }
    
    .tutorial-content {
        padding: 30px 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .error-number {
        font-size: 6rem;
    }
    
    .error-title {
        font-size: 2rem;
    }
}

/* 动画类 */
.fade-in {
    animation: fadeIn 1s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft 0.8s ease;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.8s ease;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

.bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* 工具类 */
.text-gradient {
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.shadow-effect {
    box-shadow: var(--shadow-md);
}

.rounded-large {
    border-radius: 20px;
}

.rounded-extra {
    border-radius: 30px;
}

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

.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mt-60 { margin-top: 60px; }
.mt-80 { margin-top: 80px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.mb-60 { margin-bottom: 60px; }
.mb-100 { margin-bottom: 100px; }

/* 自定义滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--accent);
    font-size: 0.9rem;
    opacity: 0.7;
    animation: pulse 2s infinite;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 100;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 进度条 */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    z-index: 1001;
    transition: width 0.3s ease;
}

/* 灯箱效果 */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 10px;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
}