/* 专业电商网站样式 - 白色主题 */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

/* 导航栏样式 */
.navbar {
    background: var(--bg-white) !important;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background-color: var(--bg-light);
}

.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
    background-color: var(--bg-light);
}

/* 搜索框样式 */
.navbar .form-control {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}

.navbar .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.navbar .btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
    border-radius: 0.5rem;
}

.navbar .btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 主内容区域 */
.container-fluid {
    padding: 0;
}

/* Hero 区域样式 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
}

.hero-section h1 {
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero-section .lead {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-section .btn-light {
    background: white;
    color: var(--primary-color);
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.hero-section .btn-light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 商品卡片样式 */
.product-card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--bg-white);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.product-card .card-img-top {
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.product-card .card-body {
    padding: 1.5rem;
}

.product-card .card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.product-card .card-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.product-card .price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.product-card .original-price {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

.product-card .badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.product-card .btn-primary {
    background: var(--primary-color);
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.product-card .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* 分类卡片样式 */
.category-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.category-card h5 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* 功能区域样式 */
.feature-section {
    padding: 3rem 0;
}

.feature-section h2 {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem 1rem;
}

.feature-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-secondary);
}

/* 页脚样式 */
.footer {
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer h5 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

.footer ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer ul li a:hover {
    color: var(--primary-color);
}

.footer ul.list-unstyled li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer ul.list-unstyled li i {
    width: 1.25rem;
    margin-right: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
        text-align: center;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .navbar-nav {
        margin-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0;
    }
    
    .feature-section {
        padding: 2rem 0;
    }
}

/* 按钮样式增强 */
.btn {
    border-radius: 0.5rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
}

/* 表单样式 */
.form-control {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 卡片样式增强 */
.card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.card-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* 工具类 */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }

.bg-light { background-color: var(--bg-light) !important; }
.bg-white { background-color: var(--bg-white) !important; }

.border { border-color: var(--border-color) !important; }

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in {
    animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}