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

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

/* 导航栏样式 */
.nav-container {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    flex-wrap: wrap;
}

.logo {
    margin-right: 2rem;
    white-space: nowrap;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
}

.logo-img {
    height: 40px;
    width: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: #f0f0f0;
}

/* 主要内容区域 */
.hero-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
    text-align: center;
}

.hero-content {
    margin-bottom: 6rem;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.subtitle {
    font-size: 1.5rem;
    color: #666;
    margin-bottom: 3rem;
}

.company-intro {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    color: #555;
}

.products-section {
    text-align: center;
    padding: 8rem 0;
    background-color: #f8f8f8;
    margin: 6rem -2rem;
    position: relative;
    overflow: hidden;
}

.products-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: #666;
    margin-bottom: 3rem;
}

.product-grid {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.product-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: transparent;
    box-shadow: none;
    padding: 2rem;
}

.product-logo {
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
}

.product-info {
    text-align: center;
    max-width: 600px;
}

.product-info h3 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.product-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 1.5rem;
}

.product-description {
    font-size: 1rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 2rem;
}

.download-buttons {
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background-color: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-size: 1rem;
    transition: opacity 0.3s;
}

.download-btn:hover {
    opacity: 0.8;
}

.download-btn img {
    width: 24px;
    height: 24px;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 2rem;
    background-color: #fff;
    border-top: 1px solid #eee;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #666;
    text-decoration: none;
    margin: 0 1rem;
}

footer p {
    color: #999;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .hero-section {
        padding: 4rem 1rem;
    }

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

    .subtitle {
        font-size: 1.2rem;
    }

    .product-card {
        padding: 1rem;
    }

    .product-info h3 {
        font-size: 2rem;
    }

    .product-subtitle {
        font-size: 1.1rem;
    }

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

    .download-btn {
        width: 200px;
        text-align: center;
    }

    .company-intro {
        padding: 0 1rem;
    }

    .products-section {
        padding: 4rem 0;
        margin: 4rem -1rem;
    }

    .product-features {
        padding: 4rem 0;
        margin-top: 4rem;
    }

    .feature-item {
        flex-direction: column;
        gap: 2rem;
        padding: 2rem 1rem;
    }

    .feature-item:nth-child(even) {
        flex-direction: column;
    }

    .feature-content {
        text-align: center;
    }

    .feature-content h3 {
        font-size: 1.8rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .logo {
        margin-right: auto;
    }

    .logo-img {
        height: 32px;
        width: 32px;
    }

    .logo span {
        font-size: 1.2rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
} 

/* 修改产品展示区域样式 */
.product-showcase {
    max-width: 100%;
    padding: 0 2rem;
}

.product-image {
    position: relative;
    margin-bottom: 3rem;
}

.showcase-img {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.brand-logo {
    width: 100px;
    height: 100px;
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border-radius: 20px;
    padding: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 功能展示区域样式 */
.product-features {
    max-width: 1200px;
    margin: 6rem auto 0;
    padding: 0 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 6rem;
}

.feature-item:last-child {
    margin-bottom: 0;
}

.feature-image {
    flex: 1;
    max-width: 50%;
}

.feature-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.feature-content {
    flex: 1;
    max-width: 50%;
}

/* 响应式调整 */
@media screen and (max-width: 768px) {
    .product-showcase {
        padding: 0 1rem;
    }

    .brand-logo {
        width: 80px;
        height: 80px;
        bottom: -40px;
    }

    .product-features {
        padding: 0 1rem;
        margin-top: 4rem;
    }

    .feature-item {
        flex-direction: column;
        gap: 2rem;
        margin-bottom: 4rem;
    }

    .feature-image,
    .feature-content {
        max-width: 100%;
    }

    .feature-content {
        text-align: center;
        padding: 0 1rem;
    }

    .download-buttons {
        padding: 0 1rem;
    }

    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

/* 添加中等屏幕的优化 */
@media screen and (min-width: 769px) and (max-width: 1024px) {
    .feature-item {
        gap: 2rem;
        padding: 0 2rem;
    }

    .feature-content h3 {
        font-size: 1.8rem;
    }
}