* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background: #f0f8fb;
    color: #fff;
    line-height: 1.6;
}

/* 导航 */
.nav {
    background: #3D8BFF;
    margin: 0 auto;
    padding: 24px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* LOGO 图片位置 */
.logo-img {
    height: 32px;
    width: auto;
}

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

.nav-links a {
    color: #f0f0f0;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.2s;
}

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

/* 头部 banner */
.banner {
    max-width: 1100px;
    margin: 60px auto 80px;
    padding: 0 20px;
}

.banner h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #000;
}

.banner p {
    font-size: 18px;
    color: #666;
    max-width: 1100px;
}

/* 头部大图位置 */
.banner-image {
    width: 100%;
    height: 420px;
    margin-top: 40px;
    border-radius: 12px;
    background: #f2f3f5;
    object-fit: cover;
}

/* 区块通用 */
.section {
    max-width: 1100px;
    margin: 0 auto 100px;
    padding: 0 20px;
}

.section h2 {
    font-size: 30px;
    font-weight: 600;
    margin-bottom: 32px;
    color: #000;
}

/* 关于我们 */
.about-content {
    font-size: 16px;
    color: #444;
    line-height: 1.8;
    max-width: 1100px;
}

/* 关于我们图片 */
.about-image {
    width: 100%;
    height: 320px;
    margin-top: 30px;
    border-radius: 12px;
    background: #f2f3f5;
    object-fit: cover;
}

/* 产品卡片（带图标位置） */
.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    padding: 28px;
    border-radius: 12px;
    background: #e8f4f8;
    transition: transform 0.2s;
}

.product-card:hover {
    transform: translateY(-4px);
}

/* 产品图标位置 */
.product-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    background: #fff;
    border-radius: 8px;
    object-fit: contain;
}

.product-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #000;
}

.product-card p {
    font-size: 14px;
    color: #666;
}

/* 新增：产品跳转链接样式 */
.product-link {
    display: inline-block;
    margin-top: 10px;
    font-size: 14px;
    color: #0066cc;
    text-decoration: underline;
    cursor: pointer;
}

.product-link:hover {
    color: #004999;
}

/* 底部 */
.footer {
    padding: 40px 20px;
    background: #3D8BFF;
    text-align: center;
    font-size: 14px;
    color: #f0f0f0;
    line-height: 1.8;
}

/* 底部链接样式 */
.footer-links a {
    color: #f0f0f0;
    text-decoration: none;
    margin: 0 8px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}

/* 备案信息样式 */
.footer-record {
    margin: 10px 0;
}

/* 防沉迷提示样式 */
.footer-anti-addiction {
    font-size: 12px;
    color: #f0f0f0;
    margin-top: 10px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .banner h1 {
        font-size: 32px;
    }

    .banner-image {
        height: 240px;
    }

    .about-image {
        height: 200px;
    }

    .nav-links {
        gap: 20px;
    }

    .product-list {
        grid-template-columns: 1fr;
    }

    .footer {
        font-size: 13px;
    }

    .footer-anti-addiction {
        font-size: 11px;
    }
}