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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0a0a0f 0%, #12121c 100%);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: baseline;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo-badge {
    font-size: 14px;
    margin-left: 2px;
    color: #888;
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    color: #ccc;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #00c6ff;
}

/* 语言切换按钮 */
.lang-switcher {
    display: flex;
    gap: 8px;
    margin-left: 20px;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.08);
    color: #ccc;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.lang-btn.active {
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white;
    border-color: transparent;
}

/* 英雄区 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 22px;
    color: #aaa;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.hero-description {
    font-size: 18px;
    color: #ccc;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white;
    box-shadow: 0 8px 20px rgba(0, 114, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 114, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 198, 255, 0.15) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    pointer-events: none;
}

/* 通用区块 */
section {
    padding: 100px 24px;
}

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

.section-header h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff, #aaa);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-header p {
    font-size: 18px;
    color: #888;
}

/* 产品网格 */
.product-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.product-grid.two-cards {
    grid-template-columns: repeat(2, 1fr);
    max-width: 1000px;
}

.product-card {
    background: rgba(25, 25, 35, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 28px;
    padding: 36px 28px;
    transition: transform 0.3s, border-color 0.3s;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 198, 255, 0.3);
}

.product-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 32px;
    margin-bottom: 8px;
}

.product-tagline {
    font-size: 16px;
    color: #00c6ff;
    margin-bottom: 20px;
    font-weight: 500;
}

.product-desc {
    color: #bbb;
    margin-bottom: 24px;
    line-height: 1.7;
}

.product-features {
    list-style: none;
    margin-bottom: 28px;
}

.product-features li {
    padding: 8px 0;
    color: #ddd;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 15px;
}

.product-version {
    display: inline-block;
    background: rgba(0, 198, 255, 0.15);
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 14px;
    color: #00c6ff;
    font-weight: 500;
}

/* 特性网格 */
.features-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.feature-item {
    background: rgba(30, 30, 40, 0.5);
    backdrop-filter: blur(5px);
    border-radius: 24px;
    padding: 36px 28px;
    border: 1px solid rgba(255, 255, 255, 0.03);
    text-align: center;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h4 {
    font-size: 24px;
    margin-bottom: 12px;
}

.feature-item p {
    color: #aaa;
}

/* 下载区 */
.download-cards {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.download-card {
    background: rgba(25, 25, 35, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 28px;
    padding: 40px 28px;
    text-align: center;
}

.download-card h3 {
    font-size: 28px;
    margin-bottom: 12px;
}

.download-card p {
    color: #aaa;
    margin-bottom: 24px;
}

.btn-download {
    display: inline-block;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white;
    padding: 14px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    margin-bottom: 12px;
    transition: 0.2s;
}

.btn-download:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.download-note {
    display: block;
    color: #666;
    font-size: 14px;
}

.download-hint {
    text-align: center;
    margin-top: 40px;
    color: #666;
    font-size: 14px;
}

/* 页脚 */
.footer {
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 24px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-copy {
    color: #777;
    margin-bottom: 8px;
}

.footer-tagline {
    color: #555;
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .lang-switcher {
        margin-left: auto;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .product-grid.two-cards,
    .download-cards {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 60px 20px;
    }
}