/* 全局样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand img {
    transition: transform 0.3s;
}

.navbar-brand img:hover {
    transform: scale(1.05);
}

/* 卡片样式 */
.card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

/* 按钮样式 */
.btn {
    border-radius: 5px;
    padding: 8px 16px;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    transform: translateY(-2px);
}

.btn-outline-primary {
    color: #0d6efd;
    border-color: #0d6efd;
}

.btn-outline-primary:hover {
    background-color: #0d6efd;
    border-color: #0d6efd;
    transform: translateY(-2px);
}

/* 表单样式 */
.form-control {
    border-radius: 5px;
    border: 1px solid #ced4da;
    padding: 10px;
}

.form-control:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13,110,253,0.25);
}

/* 商品卡片样式 */
.product-card {
    height: 100%;
}

.product-card img {
    height: 200px;
    object-fit: cover;
}

.product-card .card-body {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-card .card-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.product-card .price {
    color: #dc3545;
    font-size: 1.2rem;
    font-weight: bold;
}

/* 分页样式 */
.pagination {
    margin-top: 2rem;
}

.page-link {
    color: #0d6efd;
    border: none;
    margin: 0 2px;
    border-radius: 5px;
}

.page-item.active .page-link {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

/* 页脚样式 */
footer {
    background-color: #f8f9fa;
    padding: 3rem 0;
    margin-top: 4rem;
}

footer h5 {
    color: #333;
    margin-bottom: 1.5rem;
}

footer ul li {
    margin-bottom: 0.5rem;
}

footer a {
    color: #6c757d;
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: #0d6efd;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .navbar-brand img {
        height: 25px;
    }
    
    .carousel-item {
        height: 300px;
    }
    
    .product-card img {
        height: 150px;
    }
    
    footer {
        text-align: center;
    }
    
    footer .col-md-4 {
        margin-bottom: 2rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease-out;
}

/* 多语言切换样式 */
.language-switcher {
    position: relative;
}

.language-switcher .dropdown-menu {
    min-width: 100px;
}

/* 商品详情页样式 */
.product-detail img {
    max-height: 500px;
    object-fit: contain;
}

.product-detail .price {
    font-size: 2rem;
    color: #dc3545;
}

.product-detail .description {
    white-space: pre-line;
}

/* 表单验证样式 */
.was-validated .form-control:valid,
.form-control.is-valid {
    border-color: #198754;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(.375em + .1875rem) center;
    background-size: calc(.75em + .375rem) calc(.75em + .375rem);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: #dc3545;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linecap='round' d='M6 3.75v2.5'/%3e%3ccircle cx='6' cy='8.25' r='.75'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(.375em + .1875rem) center;
    background-size: calc(.75em + .375rem) calc(.75em + .375rem);
}