/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 容器样式 */
.container {
    padding: 2rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* 品牌 LOGO 样式 */
.brand-logo {
    height: 40px;
    width: auto;
}

/* 品牌介绍样式 */
.brand-intro {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.brand-intro p {
    margin-bottom: 1rem;
    line-height: 1.8;
    text-align: justify;
}

/* 导航栏样式 */
.navbar {
    padding: 0.5rem 1rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
}

.navbar-brand img {
    max-height: 40px;
    width: auto;
}

.navbar-nav {
    margin-left: auto;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: #2c3e50;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #3498db;
}

/* 下拉菜单样式 */
.dropdown-menu {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
}

.dropdown-item {
    padding: 0.5rem 1.5rem;
    color: #2c3e50;
    transition: background-color 0.3s;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
    color: #3498db;
}

.dropdown-divider {
    margin: 0.5rem 0;
    border-top: 1px solid #eee;
}

/* 产品卡片样式 */
.card {
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    margin-bottom: 30px;
    height: 100%;
    background: #fff;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 产品列表行样式 */
.products-row {
    margin-left: -15px;
    margin-right: -15px;
}

.products-row > [class*="col-"] {
    padding-left: 15px;
    padding-right: 15px;
    margin-bottom: 30px;
}

.card-img-wrapper {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 创建1:1的正方形容器 */
    overflow: hidden;
    background-color: #f8f9fa;
}

.card-img-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain; /* 改为contain以确保图片完整显示 */
    transition: transform 0.3s;
}

.card:hover .card-img-wrapper img {
    transform: scale(1.05);
}

.card-body {
    padding: 1.25rem;
    background: #fff;
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    height: 4.8em; /* 修改为4行，1.2em * 4 = 4.8em */
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4; /* 修改为4行 */
    -webkit-box-orient: vertical;
}

.card-title a {
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s;
}

.card-title a:hover {
    color: #3498db;
}

.card-text {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 0;
    height: 5.4em; /* 修改为4行，1.35em * 4 = 5.4em */
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4; /* 修改为4行 */
    -webkit-box-orient: vertical;
}

/* 面包屑导航 */
.breadcrumb {
    background-color: transparent;
    padding: 0.5rem 0;
    margin-bottom: 1.5rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
}

.breadcrumb-item a {
    color: #3498db;
    text-decoration: none;
}

.breadcrumb-item.active {
    color: #6c757d;
}

/* 响应式设计 */
@media (min-width: 1200px) {
    .col-xl-2 {
        flex: 0 0 16.666667%;
        max-width: 16.666667%;
    }
}

@media (max-width: 1199px) and (min-width: 992px) {
    .col-lg-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

@media (max-width: 991px) and (min-width: 768px) {
    .col-md-4 {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
}

@media (max-width: 767px) and (min-width: 576px) {
    .col-sm-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (max-width: 575px) {
    .col-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (max-width: 992px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .card-img-wrapper {
        height: 200px;
    }
    
    .navbar-nav {
        padding: 1rem 0;
    }
    
    .dropdown-menu {
        border: none;
        box-shadow: none;
        padding-left: 1rem;
    }
    
    .brand-logo {
        width: 150px;
        height: 150px;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    h5 { font-size: 1.1rem; }
    h6 { font-size: 1rem; }
    
    .card-img-wrapper {
        height: 180px;
    }
    
    .brand-intro {
        padding: 1.5rem;
    }
    
    .navbar-brand img {
        max-height: 30px;
    }
    
    .brand-logo {
        width: 120px;
        height: 120px;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .card {
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 1rem 0.5rem;
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    
    .card-img-wrapper {
        height: 160px;
    }
    
    .brand-intro {
        padding: 1rem;
    }
    
    .brand-logo {
        width: 80px;
        height: 80px;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    .card {
        margin-bottom: 1.25rem;
    }
}

/* 产品详情内容样式 */
.product-content {
    line-height: 1.8;
    color: #333;
}

.product-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem auto;
}

.product-content p {
    margin-bottom: 1rem;
}

/* 可折叠内容样式 */
.collapse-text {
    overflow: hidden;
    max-height: 7.2em;
    position: relative;
}

.collapse-content .collapse-more {
    margin-top: 0.5rem;
}