/* 阀门外贸独立站全站通用样式 - 零标红最终版 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}

body {
    background-color: #f7f8fa;
    color: #212529;
    line-height: 1.6;
}

.container {
    width: 94%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 导航栏 */
header {
    background: #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 999;
    padding: 16px 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #165DFF;
}

.nav-menu {
    display: flex;
    gap: 26px;
}

.nav-menu a {
    color: #212529;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #165DFF;
}

/* 按钮样式 */
.btn, button[type="submit"] {
    background-color: #165DFF;
    color: #ffffff !important;
    padding: 10px 22px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: opacity 0.3s;
}

.btn:hover {
    opacity: 0.92;
}

.btn-outline {
    background: transparent;
    border: 1px solid #165DFF;
    color: #165DFF !important;
}

/* 区块样式 */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 28px;
    margin-bottom: 8px;
}

.section-title p {
    color: #6c757d;
    max-width: 700px;
    margin: 0 auto;
}

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.product-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #e9ecef;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.product-info p {
    font-size: 14px;
    color: #6c757d;
    margin-bottom: 16px;
}

/* 搜索栏 */
.search-bar {
    max-width: 600px;
    margin: 0 auto 30px;
    display: flex;
}

.search-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #e9ecef;
    border-radius: 4px 0 0 4px;
    outline: none;
}

.search-bar button {
    border-radius: 0 4px 4px 0;
}

/* 详情页参数表 */
.param-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.param-table th, .param-table td {
    border: 1px solid #e9ecef;
    padding: 12px;
    text-align: left;
}

.param-table th {
    background: #f7f8fa;
}

/* 页脚 */
footer {
    background: #212529;
    color: #ffffff;
    padding: 40px 0;
    text-align: center;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .product-grid {
        grid-template-columns: 1fr;
    }
}