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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    width: 40px;
    height: 40px;
}

.brand-name {
    font-size: 24px;
    font-weight: bold;
    color: #333;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    color: #666;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #4A90E2;
}

.btn-primary {
    background: linear-gradient(135deg, #4A90E2, #357ABD);
    color: #fff;
    padding: 10px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

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

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
    border-radius: 30px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* 数据展示 */
.stats {
    padding: 80px 0;
    background: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, #4A90E2, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    color: #666;
}

/* 功能特色 */
.features {
    padding: 100px 0;
    background: #f8f9fa;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 详细功能 */
.feature-detail {
    padding: 100px 0;
    background: #fff;
}

.detail-card {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.detail-card:last-child {
    margin-bottom: 0;
}

.detail-card.reverse {
    flex-direction: row-reverse;
}

.detail-content {
    flex: 1;
}

.detail-content h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.detail-content p {
    font-size: 18px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
    padding-left: 10px;
}

.detail-image {
    flex: 1;
}

.detail-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    margin-bottom: 50px;
    opacity: 0.9;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.download-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 50px 30px;
    border-radius: 20px;
    text-align: center;
    text-decoration: none;
    color: #fff;
    transition: transform 0.3s, background 0.3s;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.download-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.25);
}

.download-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.download-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 10px;
}

.version {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 25px;
}

.download-btn {
    display: inline-block;
    background: #fff;
    color: #667eea;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    transition: transform 0.2s;
}

.download-card:hover .download-btn {
    transform: scale(1.05);
}

/* 底部 */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 30px;
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
}

.badge-icon {
    font-size: 24px;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #333;
    padding-top: 30px;
}

.footer-bottom p {
    color: #999;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 36px;
    }

    .features-grid,
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        gap: 20px;
    }

    .stat-number {
        font-size: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .detail-card,
    .detail-card.reverse {
        flex-direction: column;
    }

    .trust-badges {
        flex-wrap: wrap;
        gap: 30px;
    }
}