:root {
    --dalon-primary: #004078;     /* 德国蓝色 - 主色调 */
    --dalon-secondary: #f2a900;   /* 德国黄色 - 辅助色调 */
    --dalon-gray: #373737;        /* 深灰色 - 文本及背景 */
    --dalon-light: #f5f5f5;       /* 浅灰色 - 背景 */
    --font-primary: 'Arial', 'Helvetica', sans-serif;
}

body {
    font-family: var(--font-primary);
    color: var(--dalon-gray);
    background-color: var(--dalon-light);
    line-height: 1.6;
}

.hero-banner {
    background: linear-gradient(135deg, var(--dalon-primary) 0%, #005694 100%);
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-banner h1 {
    font-weight: 300;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

.hero-banner p {
    margin: 0 auto;
    opacity: 0.9;
    margin-bottom: 0.75rem;
}

.products-area {
    background-color: var(--dalon-light);
}

.advantages-area {
    background-color: white;
}

.cta-area {
    background-color: var(--dalon-primary);
}

/* 间距调整 */
.py-4 {
    padding-top: 1.5rem !important;
    padding-bottom: 1.5rem !important;
}

.mb-4 {
    margin-bottom: 1.5rem !important;
}

.quality-badge {
    display: inline-block;
    background-color: var(--dalon-secondary);
    color: var(--dalon-gray);
    padding: 0.25rem 1rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card {
    border: none;
    border-radius: 0;
    transition: transform 0.3s, box-shadow 0.3s;
    margin-bottom: 30px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card-header {
    border-radius: 0;
    font-weight: 500;
    letter-spacing: 0.5px;
    border: none;
    padding: 1rem 1.5rem;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #f8f9fa;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.product-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
    margin-bottom: 10px;
    background-color: white;
}

.product-link:hover {
    border-left: 3px solid var(--dalon-secondary);
    background-color: rgba(242, 169, 0, 0.05);
}

.product-link:hover .card-icon {
    border-color: var(--dalon-secondary);
}

.product-link span {
    font-weight: 500;
    color: var(--dalon-gray);
}

.product-category-title {
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
}

/* 卡片头部颜色 */
.filter-header {
    background-color: #004078;
}

.muffler-header {
    background-color: #004D40;
}

.bushing-header {
    background-color: #00695C;
}

.other-header {
    background-color: #546E7A;
}

.footer-section {
    background-color: var(--dalon-gray);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.breadcrumb {
    background: transparent;
    padding: 0.75rem 0;
}

.breadcrumb-item a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: white;
}

.breadcrumb-item+.breadcrumb-item::before {
    color: rgba(255,255,255,0.5);
}