/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.section-header p {
    font-size: 1.1rem;
    color: #7f8c8d;
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: #3498db;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    border: 2px solid #3498db;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

/* 头部导航 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #3498db;
}

nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
    height: 100%;
}

nav ul li a {
    font-weight: 500;
    transition: color 0.3s ease;
    display: inline-block;
    padding: 5px 0;
}

nav ul li a:hover {
    color: #3498db;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-content h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #7f8c8d;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

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

/* 功能区域 */
.features {
    padding: 100px 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature-card p {
    color: #7f8c8d;
}

/* 平台区域 */
.platforms {
    padding: 100px 0;
    background-color: #f5f7fa;
}

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

.platform-card {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    width: 180px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.platform-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 15px;
}

.platform-card h3 {
    font-size: 1.2rem;
    color: #2c3e50;
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background-color: white;
}

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

.download-btn {
    display: flex;
    align-items: center;
    background-color: #3498db;
    color: white;
    padding: 15px 25px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background-color: #2980b9;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.download-btn i {
    font-size: 1.8rem;
    margin-right: 10px;
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.footer-logo {
    margin-bottom: 30px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #3498db;
}

.footer-logo p {
    color: #bdc3c7;
}

.footer-links {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
}

.footer-links-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #ecf0f1;
}

.footer-links-column ul li {
    margin-bottom: 10px;
}

.footer-links-column ul li a {
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-links-column ul li a:hover {
    color: #3498db;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
}

.footer-bottom p {
    color: #bdc3c7;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: #bdc3c7;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
    }
}

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

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

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .footer-links {
        gap: 30px;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .feature-card {
        padding: 20px;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}