:root {
    --primary-color: #002B49; /* 深海蓝 - 沉稳 */
    --secondary-color: #FF6B00; /* 工业橙 - 活力 */
    --text-dark: #1A1A1A;
    --text-light: #F5F7FA;
    --bg-light: #F8F9FA;
    --border-color: #E0E0E0;
}

body {
    font-family: 'Montserrat', 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #fff;
}

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    padding: 15px 0;
}

.navbar-brand strong {
    font-weight: 800;
    letter-spacing: 0.5px;
    font-size: 1.5rem;
}

.nav-link {
    font-weight: 600;
    color: var(--primary-color) !important;
    margin: 0 10px;
    transition: 0.3s;
}

.nav-link:hover {
    color: var(--secondary-color) !important;
}

/* 按钮系统 */
.btn-primary-custom {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover {
    background-color: #e65c00;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
    color: white;
}

.btn-outline-custom {
    border: 2px solid white;
    color: white;
    padding: 12px 30px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: 0.3s;
}

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

/* 卡片特效 */
.hover-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    height: 100%;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: var(--secondary-color);
}

.card-img-wrapper {
    overflow: hidden;
    height: 240px;
    position: relative;
}

.hover-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

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

/* 详情页特定样式 */
.product-header {
    background: var(--bg-light);
    padding: 60px 0;
    margin-bottom: 40px;
}

.spec-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

.spec-table td {
    background-color: white;
}

/* 页脚 */
footer {
    background-color: #111;
    color: #aaa;
    padding: 60px 0 30px;
}

footer h5 {
    color: white;
    font-weight: 700;
    margin-bottom: 20px;
}

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

footer a:hover {
    color: var(--secondary-color);
}