/* ============================================
   星迈尔传感科技（广州）有限公司 - 主样式表
   设计风格：专业工业蓝 | 现代简约 | 响应式
   ============================================ */

/* ---------- 全局重置 & 变量 ---------- */
:root {
    --primary: #1a5fb4;
    --primary-dark: #0d4a8e;
    --primary-light: #3584e4;
    --accent: #e5a00d;
    --text-dark: #222;
    --text-mid: #555;
    --text-light: #888;
    --bg-white: #fff;
    --bg-gray: #f5f7fa;
    --bg-dark: #1a1f2e;
    --border: #e0e4ea;
    --shadow: 0 2px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-sm: 4px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
    --font-cn: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --font-en: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-cn);
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- 通用组件 ---------- */
.section {
    padding: 80px 0;
}

.section.bg-gray {
    background: var(--bg-gray);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-title p {
    font-size: 0.85rem;
    color: var(--text-light);
    letter-spacing: 3px;
    margin-top: 8px;
    font-family: var(--font-en);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 95, 180, 0.3);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.7);
}

.btn-outline:hover {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* ============================================
   顶部工具栏
   ============================================ */
.top-bar {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    font-size: 0.82rem;
    padding: 8px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-phone {
    font-weight: 600;
    color: #fff;
    letter-spacing: 1px;
}

/* ============================================
   Header
   ============================================ */
.header {
    background: #fff;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

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

.logo-icon {
    display: flex;
    flex-direction: column;
}

.logo-img {
    height: 50px;
    width: auto;
    display: block;
    margin-bottom: 6px;
}

.logo-company-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: 1px;
    white-space: nowrap;
}

.logo a {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.logo-text-cn {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 3px;
    line-height: 1.2;
}

.logo-text-en {
    font-size: 0.7rem;
    color: var(--text-light);
    letter-spacing: 2px;
    font-family: var(--font-en);
    text-transform: uppercase;
}

.header-slogan {
    text-align: right;
    line-height: 1.6;
}

.header-slogan p {
    font-size: 0.9rem;
    color: var(--text-mid);
}

.slogan-sub {
    color: var(--primary) !important;
    font-weight: 600;
    letter-spacing: 2px;
}

/* ============================================
   主导航
   ============================================ */
.navbar {
    background: var(--primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 0;
}

.nav-link {
    display: block;
    padding: 16px 24px;
    color: rgba(255,255,255,0.9);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    white-space: nowrap;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

.nav-link.nav-highlight {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.nav-link.nav-highlight:hover {
    background: #d4930b;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.arrow-down {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid rgba(255,255,255,0.7);
    margin-left: 6px;
    vertical-align: middle;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: #fff;
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    z-index: 999;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-dark);
    font-size: 0.9rem;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: var(--bg-gray);
    color: var(--primary);
    padding-left: 25px;
}

/* 移动菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px;
}

/* 移动导航 */
.mobile-nav {
    display: none;
    background: #fff;
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    z-index: 2000;
    box-shadow: var(--shadow-lg);
    transition: left 0.3s ease;
    overflow-y: auto;
    padding-top: 60px;
}

.mobile-nav.active {
    left: 0;
}

.mobile-nav > ul > li > a {
    display: block;
    padding: 14px 24px;
    font-size: 1rem;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
}

.mobile-nav > ul > li > a:hover {
    color: var(--primary);
    background: var(--bg-gray);
}

.mobile-nav .mobile-sub > ul {
    background: var(--bg-gray);
    display: none;
}

.mobile-nav .mobile-sub.open > ul {
    display: block;
}

.mobile-nav .mobile-sub > ul a {
    display: block;
    padding: 10px 36px;
    font-size: 0.9rem;
    color: var(--text-mid);
    border-bottom: 1px solid var(--border);
}

/* 遮罩层 */
.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1500;
}

.mobile-overlay.active {
    display: block;
}

/* ============================================
   Hero / Banner
   ============================================ */
.hero {
    position: relative;
    height: 520px;
    overflow: hidden;
    background: #1a5fb4;
}

.hero-slider {
    height: 100%;
    position: relative;
}

.hero-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
}

.hero-slide > * {
    position: relative;
    z-index: 2;
}

.hero-slide.active {
    opacity: 1;
    pointer-events: auto;
    z-index: 1;
}

.hero-content {
    text-align: center;
    color: #fff;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 5px;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease;
}

.hero-desc {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 12px;
    animation: fadeInUp 0.8s ease 0.15s both;
}

.hero-slogan {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 4px;
    margin-bottom: 30px;
    color: #ffd700;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.45s both;
}

.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: #fff;
    transform: scale(1.3);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================
   优势特色
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    margin-bottom: 20px;
}

.icon-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-en);
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 14px;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.8;
}

/* ============================================
   产品中心
   ============================================ */
.products-layout {
    display: flex;
    gap: 30px;
}

.products-sidebar {
    flex: 0 0 220px;
}

.products-sidebar h3 {
    font-size: 1.1rem;
    padding: 16px 20px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.category-list {
    background: #fff;
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.category-list li {
    border-bottom: 1px solid var(--border);
}

.category-list li:last-child {
    border-bottom: none;
}

.cat-link {
    display: block;
    padding: 14px 20px;
    font-size: 0.9rem;
    color: var(--text-dark);
    transition: var(--transition);
    position: relative;
}

.cat-link::before {
    content: '▸';
    margin-right: 8px;
    color: var(--text-light);
    font-size: 0.7rem;
    transition: var(--transition);
}

.cat-link:hover,
.cat-link.active {
    color: var(--primary);
    background: #f0f5fc;
    padding-left: 26px;
}

.cat-link:hover::before,
.cat-link.active::before {
    color: var(--primary);
}

.products-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-img {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: #f0f4f8;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.08);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 95, 180, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-info {
    padding: 16px 18px;
}

.product-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.product-cat {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ============================================
   定制流程
   ============================================ */
.process-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.step-item {
    text-align: center;
    padding: 20px;
}

.step-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 10px;
    transition: var(--transition);
}

.step-item:hover .step-icon {
    background: var(--primary);
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(26, 95, 180, 0.3);
}

.step-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
}

.step-arrow {
    display: none;
}

/* ============================================
   关于我们
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-text {
    line-height: 2;
}

.about-text p {
    margin-bottom: 16px;
    color: var(--text-mid);
    text-indent: 2em;
}

.about-cert h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.cert-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.cert-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 3/4;
    background: #f0f4f8;
    cursor: pointer;
    transition: var(--transition);
}

.cert-item:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow);
}

.cert-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   新闻资讯
   ============================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-card {
    display: flex;
    gap: 20px;
    background: #fff;
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.news-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.news-date {
    flex-shrink: 0;
    width: 60px;
    text-align: center;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 10px 6px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1.3;
}

.date-day {
    font-size: 1.4rem;
    font-weight: 700;
}

.date-month {
    font-size: 0.7rem;
    opacity: 0.9;
}

.news-content h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.news-content h4 a:hover {
    color: var(--primary);
}

.news-content p {
    font-size: 0.88rem;
    color: var(--text-mid);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   CTA
   ============================================ */
.cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
}

.cta-content {
    text-align: center;
    padding: 20px 0;
}

.cta-content h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    letter-spacing: 3px;
}

.cta-content p {
    font-size: 1rem;
    margin-bottom: 24px;
    opacity: 0.9;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-dark);
    color: #ccc;
    padding-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding-bottom: 40px;
}

.footer-col h3 {
    color: #fff;
    font-size: 1.05rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    position: relative;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 36px;
    height: 2px;
    background: var(--primary-light);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.9rem;
    color: #aaa;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-contact p {
    font-size: 0.88rem;
    margin-bottom: 10px;
    color: #aaa;
}

.footer-qr {
    text-align: center;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: #fff;
    margin: 0 auto 10px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.85rem;
}

.qr-code p {
    font-size: 0.82rem;
    color: #999;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 18px 0;
    text-align: center;
    font-size: 0.82rem;
    color: #888;
}

/* ============================================
   返回顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ============================================
   子页面通用样式
   ============================================ */
.page-banner {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.page-banner h1 {
    font-size: 2.2rem;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.page-banner .breadcrumb {
    font-size: 0.85rem;
    opacity: 0.85;
}

.page-banner .breadcrumb a {
    color: rgba(255,255,255,0.85);
}

.page-banner .breadcrumb a:hover {
    color: #fff;
}

.page-banner .breadcrumb span {
    margin: 0 8px;
}

.page-content {
    padding: 50px 0;
}

/* 联系我们页面 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-card {
    background: var(--bg-gray);
    padding: 40px;
    border-radius: var(--radius);
}

.contact-info-card h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-detail p {
    font-size: 0.9rem;
    color: var(--text-mid);
}

/* 留言表单 */
.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-dark);
}

.form-group label .required {
    color: #e74c3c;
    margin-left: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font-cn);
    transition: var(--transition);
    background: var(--bg-gray);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

/* 关于我们子页 */
.about-page .about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}

.about-image {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image .img-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #e0e8f0, #c8d4e2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1rem;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 50px;
}

.value-card {
    text-align: center;
    padding: 30px 20px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.value-num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-en);
}

.value-card h4 {
    font-size: 1rem;
    margin-top: 10px;
}

.value-card p {
    font-size: 0.85rem;
    color: var(--text-mid);
    margin-top: 8px;
}

/* 产品列表页 */
.products-page-layout {
    display: flex;
    gap: 30px;
}

.products-page-sidebar {
    flex: 0 0 220px;
}

.products-page-main {
    flex: 1;
}

.products-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-filter {
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-filter .result-count {
    font-size: 0.9rem;
    color: var(--text-mid);
}

/* 新闻列表页 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-list-item {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.news-list-item:hover {
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.news-list-date {
    flex-shrink: 0;
    width: 70px;
    text-align: center;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 14px 10px;
    line-height: 1.3;
}

.news-list-body h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.news-list-body h3 a:hover {
    color: var(--primary);
}

.news-list-body p {
    font-size: 0.9rem;
    color: var(--text-mid);
    margin-bottom: 10px;
}

.news-list-meta {
    font-size: 0.8rem;
    color: var(--text-light);
}

.news-list-meta span {
    margin-right: 16px;
}

/* 消息/留言页 */
.message-page .contact-grid {
    grid-template-columns: 1fr 1fr;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .products-grid,
    .products-page-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    /* Header */
    .header .container {
        flex-direction: column;
        text-align: center;
    }

    .header-slogan {
        text-align: center;
        margin-top: 12px;
    }

    /* 导航 */
    .nav-list {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .mobile-nav {
        display: block;
    }

    /* Hero */
    .hero {
        height: 400px;
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: 2px;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .hero-slogan {
        font-size: 1.1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    /* 特性 */
    .features-grid {
        grid-template-columns: 1fr;
    }

    /* 产品 */
    .products-layout {
        flex-direction: column;
    }

    .products-sidebar {
        flex: auto;
    }

    .category-list {
        display: flex;
        flex-wrap: wrap;
    }

    .category-list li {
        border-bottom: none;
    }

    .cat-link {
        padding: 10px 14px;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 流程 */
    .process-steps {
        gap: 20px;
    }

    .step-item {
        width: 120px;
    }

    /* 关于 */
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-page .about-intro {
        grid-template-columns: 1fr;
    }

    /* 新闻 */
    .news-grid {
        grid-template-columns: 1fr;
    }

    /* 联系 */
    .contact-grid,
    .message-page .contact-grid {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    /* 关于页 */
    .about-values {
        grid-template-columns: 1fr;
    }

    .products-page-layout {
        flex-direction: column;
    }

    .products-page-sidebar {
        flex: auto;
    }
}

@media (max-width: 480px) {
    .products-grid,
    .products-page-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        height: 340px;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .cert-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .btn-lg {
        padding: 12px 30px;
        font-size: 1rem;
    }
}