/* ===== 全局样式 ===== */
:root {
    --primary: #1a5276;
    --primary-light: #2980b9;
    --accent: #e74c3c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: #333;
    background: #f8f9fa;
}

/* ===== 导航栏 ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.1rem;
}

/* ===== Banner ===== */
.hero-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #3498db 100%);
    padding: 4rem 0;
}

.hero-banner .display-4 {
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* ===== 统计数字 ===== */
.stat-number {
    font-size: 2rem;
    font-weight: 700;
}

/* ===== 分类卡片 ===== */
.category-card {
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-color: var(--primary-light);
}

/* ===== 产品卡片 ===== */
.product-card {
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.price-tag {
    font-family: "DIN Alternate", "Helvetica Neue", sans-serif;
}

/* ===== 新闻卡片 ===== */
.news-card {
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.news-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

/* ===== 筛选卡片 ===== */
.filter-card {
    position: sticky;
    top: 80px;
}

/* ===== 联系页面 ===== */
.contact-icon {
    width: 45px;
    height: 45px;
    min-width: 45px;
}

/* ===== 文章样式 ===== */
.article-content {
    line-height: 1.8;
    font-size: 1rem;
}

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

/* ===== 页脚 ===== */
footer {
    background: #1a1a2e !important;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .hero-banner {
        padding: 2rem 0;
    }
    .hero-banner .display-4 {
        font-size: 1.5rem;
    }
    .filter-card {
        position: static;
    }
}