* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #0066cc;
}

.logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #0066cc;
}

/* 首屏区域 */
.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #0066cc, #0099ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 1.5rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(90deg, #0066cc, #0099ff);
    color: white;
    box-shadow: 0 10px 20px rgba(0, 102, 204, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(0, 102, 204, 0.3);
}

.btn-secondary {
    background: white;
    color: #0066cc;
    border: 2px solid #e0e0e0;
}

.btn-secondary:hover {
    background: #f8f9fa;
    border-color: #d0d0d0;
}

/* 特性部分 */
.features {
    padding: 100px 0;
    background: white;
    border-radius: 40px 40px 0 0;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.05);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 80px;
    color: #222;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    background: #f8f9fa;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e6f2ff, #cce6ff);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: #0066cc;
    font-size: 36px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #222;
}

.feature-card p {
    color: #666;
    font-size: 1.1rem;
}

/* 截图部分 */
.screenshots {
    padding: 100px 0;
    text-align: center;
}

.screenshot-container {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.screenshot {
    width: 400px;
    height: 250px;
    border-radius: 8px 8px 0 0;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
    transition: transform 0.4s;
    position: relative;
    background: linear-gradient(135deg, #f0f5ff, #e6f0ff);
    border: 12px solid #222;
    border-bottom: 60px solid #222;
}

.screenshot::before {
    content: "";
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 8px;
    background: #333;
    border-radius: 0 0 5px 5px;
}

.screenshot::after {
    content: "";
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #555;
    border-radius: 0 0 3px 3px;
}

.screenshot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.screenshot:hover {
    transform: translateY(-10px);
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, #0066cc, #0099ff);
    color: white;
    text-align: center;
    border-radius: 40px;
    margin: 40px;
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.3);
}

.download h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.download p {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 50px;
    opacity: 0.9;
}

.platforms {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.platform-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    width: 250px;
    transition: transform 0.3s;
}

.platform-card:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.25);
}

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

.platform-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* 页脚 */
footer {
    padding: 60px 0 30px;
    background: #f8f9fa;
    text-align: center;
    color: #666;
}

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

.footer-links a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #0066cc;
}

.copyright {
    margin-top: 20px;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .download {
        margin: 20px;
    }
}