/* 全局样式 */
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: 'Roboto', sans-serif; background:#f7f7f7; color:#333; }
a { text-decoration:none; color:inherit; }
img { max-width:100%; display:block; }
.container { width:1200px; max-width:95%; margin:0 auto; }

/* 顶部导航 */
header { background:#fff; padding:15px 0; box-shadow:0 2px 5px rgba(0,0,0,0.1); position:sticky; top:0; z-index:1000; }
.nav { display:flex; justify-content:space-between; align-items:center; }

/* logo 样式 */
.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px; /* 根据实际 logo 调整 */
    width: auto;
    margin-right: 10px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: inherit;
}

.nav ul { list-style:none; display:flex; gap:25px; }
.nav ul li a { font-weight:500; transition:0.3s; }
.nav ul li a:hover { color:#ff0050; }

/* Banner */
.banner {
    background: #f7f7f7; /* 背景色可改 */
    padding: 60px 0;
}
.banner-flex {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 50px;
    align-items: flex-start; /* 原来是 center，现在改成顶对齐 */
}
.banner-text {
    flex: 1 1 500px;
}
.banner-text h1 {
    font-size: 36px;
    margin-bottom: 20px;
}
.banner-text p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 15px;
    color: #333;
}

/* Banner 按钮组 */
.banner-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.banner-btns .btn {
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    transition: 0.3s;
}

/* 按钮样式分类 */
.btn.primary {
    background: #ff0050;
    color: #fff;
}
.btn.primary:hover {
    background: #ff3380;
}

.btn.secondary {
    background: #fff;
    color: #ff0050;
    border: 1px solid #ff0050;
}
.btn.secondary:hover {
    background: #ffe6eb;
}

.btn.tertiary {
    background: #333;
    color: #fff;
}
.btn.tertiary:hover {
    background: #555;
}

/* 右侧轮播 */
/* 右侧轮播容器固定大小 */
.banner-images {
    flex: 1 1 450px; /* 最小宽度 400px，可调整 */
    max-width: 450px;
    height: 500px;   /* 固定高度 */
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.banner-images img {
    width: 100%;
    height: 100%;
    object-fit: cover;       /* 保持比例填充容器 */
    object-position: top;    /* 优先显示图片上方部分 */
    display: none;           /* 轮播时隐藏非active */
}

.banner-images img.active {
    display: block;
}

/* 左右按钮 */
.banner-images .prev,
.banner-images .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.3);
    color: #fff;
    border: none;
    font-size: 24px;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 5px;
}
.banner-images .prev { left: 10px; }
.banner-images .next { right: 10px; }



/* 核心优势 */
.advantages {
    padding: 60px 0;
    background: #f7f7f7;
}

.advantages h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: #ff0050;
}

/* 核心优势列表：一行四块 */
.adv-list {
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 20px;
}

/* 每块方块 */
.adv-item {
    flex: 1 1 23%; /* 四块占一行 */
    background: #fff;
    padding: 25px 20px;
    border-radius: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 300px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

/* 图标 */
.adv-item svg {
    width: 48px;
    height: 48px;
    margin-bottom: 15px;
}

/* 标题 */
.adv-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #ff0050;
    line-height: 1.3;
}

/* 段落文字 */
.adv-item p {
    font-size: 14px;
    color: #333;
    line-height: 1.6;
    max-width: 220px;     /* 控制文字宽度 */
    text-align: left;     /* 左对齐 */
    word-break: break-word; /* 遇到长词强制换行 */
}

/* 响应式折行 */
@media (max-width: 992px) {
    .adv-list {
        flex-wrap: wrap;
    }
    .adv-item {
        flex: 1 1 48%;
        margin-bottom: 20px;
    }
}

@media (max-width: 600px) {
    .adv-item {
        flex: 1 1 100%;
    }
}

/* 产品中心 */
/* 产品中心整体 */
.products {
    padding: 60px 0;
    text-align: center;
    background: #f7f7f7;
}

.products h2 {
    color: #ff0050;
    font-size: 28px;
    margin-bottom: 40px;
}

/* 产品列表 */
.products-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 每个产品 */
.product-item {
    flex: 1 1 23%;
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    text-align: center;
}

/* 产品图片 */
.product-item img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
}

/* 按钮 */
.product-item a {
    display: inline-block;
    background: #ff0050;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
}

/* 响应式 */
@media (max-width: 992px) {
    .product-item {
        flex: 1 1 48%; /* 平板一行两块 */
    }
}

@media (max-width: 600px) {
    .product-item {
        flex: 1 1 100%; /* 手机一行一块 */
    }
}

/* 成功案例模块 */
.cases {
    padding: 60px 0;
    text-align: center;
}

.cases h2 {
    color: #ff0050;
    font-size: 28px;
    margin-bottom: 40px;
}

/* 上下排容器 */
.case-row {
    display: flex;
    flex-wrap: nowrap; /* 不允许换行 */
    margin-bottom: 20px;
    gap: 20px;
    box-sizing: border-box;
}

/* 上排两张图 */
.top-row .large {
    flex: 0 0 calc(60% - 10px); /* 减去 gap 一半，保证不换行 */
}

.top-row .small {
    flex: 0 0 calc(40% - 10px); /* 减去 gap 一半 */
}

/* 下排三张等宽图 */
.bottom-row .case-item {
    flex: 0 0 calc(33.333% - 13.33px); /* 三张均分宽度减掉gap */
}

/* 图片样式 */
.case-item img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    display: block;
}

/* 响应式 */
@media (max-width: 992px) {
    .top-row, .bottom-row {
        flex-wrap: wrap; /* 移动端换行 */
    }
    .top-row .large,
    .top-row .small,
    .bottom-row .case-item {
        flex: 0 0 100%;
    }
    .case-row {
        gap: 15px;
    }
}

/* 关于我们 */
.about {
    padding: 60px 0;
    text-align: center;
    background: #fff;
}

.about h2 {
    color: #ff0050;
    font-size: 28px;
    margin-bottom: 30px;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.about-content p {
    line-height: 1.9;
    color: #555;
    margin-bottom: 15px;
}


/* 联系我们模块 */
.contact {
    padding: 60px 0;
    text-align: center;
    background: #f7f7f7;
}

.contact h2 {
    color: #ff0050;
    font-size: 28px;
    margin-bottom: 40px;
}

/* 内容布局：二维码 + 邮箱并排 */
.contact-content {
    display: flex;
    justify-content: center; /* 居中整个行 */
    align-items: flex-start;
    gap: 80px; /* 两块之间间距 */
    flex-wrap: wrap; /* 移动端折行 */
}

/* 每个联系方式 */
.contact-item {
    text-align: center;
}

.contact-item h3 {
    font-size: 20px;
    color: #ff0050;
    margin-bottom: 20px;
}

.contact-item img {
    width: 180px;
    height: 180px;
    object-fit: contain;
    border-radius: 10px;
}

.contact-item p {
    font-size: 16px;
    color: #333;
}

.contact-item a {
    color: #ff0050;
    text-decoration: none;
}

/* 响应式：屏幕窄时上下排列 */
@media (max-width: 768px) {
    .contact-content {
        flex-direction: column;
        gap: 40px;
        align-items: center;
    }
}


.site-footer {
    background: #111; /* 深色背景 */
    color: #fff;
    padding: 30px 0;
    text-align: center;
    font-size: 14px;
}

.site-footer .footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.site-footer .footer-links {
    list-style: none;
    padding: 0;
    margin: 0 0 10px;
    display: flex;
    justify-content: center;
    gap: 30px;
}

.site-footer .footer-links li a {
    color: #ff0050;
    text-decoration: none;
    transition: 0.3s;
}

.site-footer .footer-links li a:hover {
    text-decoration: underline;
}

.footer-copy {
    margin-top: 10px;
    color: #ccc;
    font-size: 13px;
    text-align: center;
}

.footer-copy small {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* 备案链接 */
.beian-link {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #999;
    text-decoration: none;
    white-space: nowrap;
}

.beian-link:hover {
    color: #ff0050;
}

/* 图标 */
.footer-gongan-logo {
    width: 16px;
    height: 16px;
}

/* 响应式 */
@media (max-width: 600px) {
    .site-footer .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}