:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --dark: #0f172a;
    --darker: #0a0f1f;
    --dark-light: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-dark: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
    --shadow-light: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s ease;
}

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

body {
    background-color: var(--dark);
    color: var(--light);
    font-family: 'Inter', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
    font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    line-height: 1.2;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 头部样式 */
header {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 18px 0;
    transition: var(--transition);
}

.header-scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-light);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
}

.logo:hover .logo-icon::after {
    animation: shine 1.5s ease;
}

@keyframes shine {
    100% { transform: translateX(100%); }
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 2.2rem;
    font-weight: 900;
    color: white;
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-top: 2px;
}

.version-badge {
    background: rgba(16, 185, 129, 0.15);
    color: var(--secondary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(16, 185, 129, 0.3);
    margin-left: 10px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 50px;
}

nav a {
    color: var(--gray-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
}

nav a:hover {
    color: white;
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient);
    border-radius: 3px;
    transition: var(--transition);
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

.btn {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-dark);
    opacity: 0;
    transition: var(--transition);
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(99, 102, 241, 0.4);
}

.btn:hover::before {
    opacity: 1;
}

.btn span {
    position: relative;
    z-index: 1;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 英雄区域 */
.hero {
    padding: 200px 0 150px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 15% 25%, rgba(99, 102, 241, 0.2) 0%, transparent 45%),
        radial-gradient(circle at 85% 75%, rgba(16, 185, 129, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.1) 0%, transparent 40%);
    z-index: -1;
}

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

.hero-text {
    flex: 1;
}

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

.hero h1 {
    font-size: 4.2rem;
    margin-bottom: 30px;
    background: linear-gradient(to right, #fff, var(--gray-light), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.1;
}

.hero p {
    font-size: 1.3rem;
    color: var(--gray-light);
    margin-bottom: 50px;
    max-width: 650px;
}

.highlight {
    color: var(--primary);
    font-weight: 800;
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(99, 102, 241, 0.25);
    z-index: -1;
    border-radius: 4px;
}

.stats {
    display: flex;
    gap: 70px;
    margin-top: 70px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    color: var(--gray);
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.85), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    padding: 50px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 600px;
    position: relative;
    overflow: hidden;
}

.hero-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--gradient);
}

.hero-icon {
    font-size: 3.5rem;
    color: var(--primary);
    margin-bottom: 20px;
    text-align: center;
}

.hero-card h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: white;
    text-align: center;
}

.hero-card p {
    color: var(--gray-light);
    font-size: 1.2rem;
    margin-bottom: 30px;
    text-align: center;
}

.hero-metrics {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-metrics > div {
    text-align: center;
    min-width: 120px;
}

.hero-metrics .metric-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.hero-metrics .metric-label {
    font-size: 1rem;
    color: var(--gray);
    margin-top: 8px;
}

.hero-features {
    background: rgba(99, 102, 241, 0.1);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
}

.hero-features p {
    color: var(--gray-light);
    margin-bottom: 15px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.hero-features p i {
    color: var(--secondary);
}

/* 特性区域 */
.features {
    padding: 150px 0;
    background-color: var(--darker);
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 100px;
}

.section-title h2 {
    font-size: 3.5rem;
    margin-bottom: 25px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-title p {
    color: var(--gray);
    max-width: 750px;
    margin: 0 auto;
    font-size: 1.3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 50px;
}

.feature-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    padding: 60px 45px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-20px);
    border-color: transparent;
    box-shadow: var(--shadow);
}

.feature-card:hover::before {
    opacity: 0.05;
}

.feature-icon {
    width: 90px;
    height: 90px;
    border-radius: 25px;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 35px;
    font-size: 2.5rem;
    color: var(--primary);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card:hover .feature-icon::after {
    opacity: 0.1;
}

.feature-icon i {
    position: relative;
    z-index: 1;
}

.feature-card h3 {
    font-size: 1.9rem;
    margin-bottom: 25px;
    color: white;
}

.feature-card p {
    color: var(--gray-light);
    font-size: 1.15rem;
}

/* 用户评价区域 */
.testimonials {
    padding: 150px 0;
    background: radial-gradient(circle at 70% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
}

.testimonials-slider {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonials-track {
    display: flex;
    transition: transform 0.5s ease;
}

.testimonial-card {
    flex: 0 0 100%;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    padding: 60px 50px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin: 0 15px;
}

.testimonial-header {
    display: flex;
    align-items: center;
    margin-bottom: 35px;
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-right: 25px;
    flex-shrink: 0;
}

.testimonial-info h4 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: white;
}

.testimonial-info p {
    color: var(--gray);
    font-size: 1rem;
}

.testimonial-rating {
    color: var(--accent);
    font-size: 1.2rem;
    margin-top: 10px;
}

.testimonial-content {
    color: var(--gray-light);
    font-size: 1.2rem;
    line-height: 1.8;
    font-style: italic;
}

.slider-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 50px;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--primary);
    transform: scale(1.3);
}

/* 版本历史区域 */
.version-history {
    padding: 150px 0;
    background-color: var(--darker);
}

.version-timeline {
    position: relative;
    max-width: 1000px;
    margin: 80px auto 0;
}

.version-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient);
    transform: translateX(-50%);
    border-radius: 2px;
}

.version-item {
    display: flex;
    align-items: center;
    margin-bottom: 80px;
    position: relative;
}

.version-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.version-content {
    flex: 1;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    transition: var(--transition);
}

.version-item:nth-child(even) .version-content {
    margin-right: 60px;
}

.version-item:nth-child(odd) .version-content {
    margin-left: 60px;
}

.version-content:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: var(--shadow-light);
}

.version-marker {
    width: 24px;
    height: 24px;
    background: var(--gradient);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    border: 4px solid var(--darker);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.version-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.version-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
}

.version-date {
    color: var(--gray);
    font-size: 1rem;
    font-weight: 600;
}

.version-features {
    list-style: none;
}

.version-features li {
    margin-bottom: 12px;
    color: var(--gray-light);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.version-features li i {
    color: var(--secondary);
    margin-top: 3px;
    flex-shrink: 0;
}

.current-version {
    text-align: center;
    margin-bottom: 100px;
}

.current-version .version-number {
    font-size: 4rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 20px;
}

.current-version p {
    font-size: 1.3rem;
    color: var(--gray-light);
    max-width: 700px;
    margin: 0 auto 40px;
}

/* 下载页样式 */
.download-hero {
    padding: 200px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.2) 0%, transparent 50%);
    z-index: -1;
}

.download-hero h1 {
    font-size: 4.5rem;
    margin-bottom: 30px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.download-hero p {
    font-size: 1.4rem;
    color: var(--gray-light);
    max-width: 800px;
    margin: 0 auto 60px;
}

.download-cta {
    margin-top: 40px;
}

.download-section {
    padding: 120px 0;
}

.platforms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 50px;
    margin-bottom: 120px;
}

.platform-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    padding: 50px 40px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.platform-card:hover {
    transform: translateY(-20px);
    border-color: transparent;
    box-shadow: var(--shadow);
}

.platform-card:hover::before {
    opacity: 0.05;
}

.platform-icon {
    font-size: 5rem;
    margin-bottom: 30px;
    transition: var(--transition);
}

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

.windows { color: #0078d7; }
.mac { color: #999; }
.android { color: #3ddc84; }
.ios { color: #007aff; }
.linux { color: #f1502f; }

.platform-card h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: white;
}

.platform-card p {
    color: var(--gray-light);
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.version-info {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 20px 0;
    border: 1px solid rgba(99, 102, 241, 0.3);
    display: inline-block;
}

.platform-specs {
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    padding: 25px;
    margin-top: 30px;
    text-align: left;
}

.platform-specs h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--primary-light);
}

.platform-specs ul {
    list-style: none;
}

.platform-specs li {
    color: var(--gray-light);
    margin-bottom: 10px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.platform-specs li i {
    color: var(--secondary);
    font-size: 0.8rem;
}

/* 历史版本下载区域 */
.historical-versions {
    padding: 100px 0;
    background-color: var(--darker);
}

.version-table {
    width: 100%;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.version-table table {
    width: 100%;
    border-collapse: collapse;
}

.version-table thead {
    background: rgba(99, 102, 241, 0.1);
}

.version-table th {
    padding: 25px 30px;
    text-align: left;
    color: var(--primary-light);
    font-weight: 700;
    font-size: 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.version-table td {
    padding: 25px 30px;
    color: var(--gray-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.version-table tr:last-child td {
    border-bottom: none;
}

.version-table tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

.version-tag {
    display: inline-block;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-right: 10px;
}

.tag-current {
    background: rgba(16, 185, 129, 0.15);
    color: var(--secondary);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-stable {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.tag-legacy {
    background: rgba(100, 116, 139, 0.15);
    color: var(--gray);
    border: 1px solid rgba(100, 116, 139, 0.3);
}

/* 指南区域 */
.guide {
    margin: 100px 0;
}

.guide h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: white;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.step {
    text-align: center;
    padding: 30px 20px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    margin: 0 auto 30px;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: white;
}

.step p {
    color: var(--gray-light);
}

/* 页脚 */
footer {
    background-color: #0a0f1f;
    padding: 120px 0 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 70px;
    margin-bottom: 80px;
}

.footer-column h3 {
    font-size: 1.5rem;
    margin-bottom: 35px;
    color: white;
    position: relative;
    padding-bottom: 15px;
}

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

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

.footer-links li {
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 10px;
}

.footer-links a i {
    font-size: 0.9rem;
    width: 20px;
}

.social-links {
    display: flex;
    gap: 20px;
    margin-top: 35px;
}

.social-links a {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    font-size: 1.4rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px) rotate(5deg);
}

.copyright {
    text-align: center;
    padding-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--gray);
    font-size: 1rem;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 14px;
}

::-webkit-scrollbar-track {
    background: var(--darker);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 7px;
    border: 3px solid var(--darker);
}

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

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero h1, .download-hero h1 {
        font-size: 3.5rem;
    }

    .section-title h2 {
        font-size: 3rem;
    }

    .version-timeline::before {
        left: 30px;
    }

    .version-item {
        flex-direction: row !important;
    }

    .version-item .version-content {
        margin-left: 80px !important;
        margin-right: 0 !important;
    }

    .version-marker {
        left: 30px;
    }
}

@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 70px;
    }

    .stats {
        justify-content: center;
    }

    nav ul {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .features-grid, .platforms {
        grid-template-columns: 1fr;
    }

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

    .section-title h2 {
        font-size: 2.8rem;
    }

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

@media (max-width: 768px) {
    .hero h1, .download-hero h1 {
        font-size: 2.5rem;
    }

    .section-title h2 {
        font-size: 2.2rem;
    }

    .current-version .version-number {
        font-size: 3rem;
    }

    .container {
        padding: 0 20px;
    }

    .feature-card, .platform-card, .testimonial-card {
        padding: 40px 25px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}