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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

.container {
    width: 95%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.top-bar {
    background: #0a0a0a;
    padding: 10px 0;
    font-size: 13px;
    color: #aaa;
}

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

.top-bar-left {
    display: flex;
    gap: 30px;
}

.top-bar-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar-item i {
    color: #0066cc;
}

.top-bar-right {
    display: flex;
    gap: 20px;
}

.top-bar-right a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.top-bar-right a:hover {
    color: #0066cc;
}

header {
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo h1 {
    font-size: 26px;
    color: #111;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav-links > li {
    position: relative;
}

.nav-links > li > a {
    display: block;
    padding: 12px 22px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s;
}

.nav-links > li > a:hover,
.nav-links > li > a.active {
    color: #0066cc;
}

.nav-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 220px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    padding: 12px 0;
    z-index: 100;
}

.nav-links > li:hover .nav-dropdown {
    display: block;
}

.nav-dropdown li {
    list-style: none;
}

.nav-dropdown a {
    display: block;
    padding: 10px 24px;
    color: #555;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

.nav-dropdown a:hover {
    color: #0066cc;
    background: #f8f9fa;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s;
}

.hero {
    position: relative;
    height: 600px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect x="0" y="0" width="100" height="100" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/><line x1="0" y1="50" x2="100" y2="50" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/><line x1="50" y1="0" x2="50" y2="100" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>');
    background-size: 60px 60px;
    z-index: 1;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-image-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.hero-image-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
}

.hero-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    color: #fff;
    padding-left: 50px;
}

.hero-content h2 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 40px;
    max-width: 600px;
    opacity: 0.85;
    line-height: 1.8;
}

.btn {
    display: inline-block;
    padding: 14px 42px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #0066cc;
    color: #fff;
}

.btn-primary:hover {
    background: #0052a3;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-outline:hover {
    background: #fff;
    color: #111;
}

section {
    padding: 90px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 60px;
}

.section-title h3 {
    font-size: 36px;
    font-weight: 700;
    color: #111;
    margin-bottom: 10px;
}

.section-title p {
    color: #888;
    font-size: 15px;
}

.section-more a {
    color: #0066cc;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.section-more a:hover {
    gap: 10px;
}

.product-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-categories-section .section-header {
    justify-content: center;
    text-align: center;
}

.product-categories-section .section-title {
    text-align: center;
}

.product-categories-section .section-title h3 {
    font-size: 42px;
    margin-bottom: 15px;
}

.product-categories-section .section-title p {
    font-size: 18px;
    color: #666;
}

.product-categories-section .section-more {
    display: none;
}

.product-category {
    background: #fff;
    border-radius: 16px;
    padding: 50px 40px;
    transition: all 0.3s ease;
    border: 1px solid #e8e8e8;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.product-category:hover {
    background: #0066cc;
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,102,204,0.2);
    border-color: #0066cc;
}

.product-category:hover h4,
.product-category:hover a {
    color: #fff;
}

.product-category h4 {
    font-size: 26px;
    color: #111;
    margin-bottom: 30px;
    font-weight: 700;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 12px;
}

.product-category h4::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 28px;
    background: #0066cc;
    border-radius: 2px;
}

.product-category:hover h4::before {
    background: #fff;
}

.product-category ul {
    list-style: none;
}

.product-category li {
    margin-bottom: 16px;
}

.product-category a {
    color: #555;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-category a::before {
    content: '→';
    font-size: 14px;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s;
}

.product-category:hover a::before {
    opacity: 1;
    transform: translateX(0);
}

.product-category:hover a {
    color: rgba(255,255,255,0.9);
    padding-left: 5px;
}

.features {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.features .section-header {
    justify-content: center;
    text-align: center;
}

.features .section-title {
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.feature-item {
    background: #fff;
    padding: 40px 25px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0066cc, #00a8ff);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-color: #e8e8e8;
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-number {
    font-size: 52px;
    font-weight: 800;
    background: linear-gradient(135deg, #0066cc, #00a8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    line-height: 1;
}

.feature-item h4 {
    font-size: 20px;
    color: #111;
    margin-bottom: 15px;
    font-weight: 700;
}

.feature-item p {
    color: #666;
    line-height: 1.8;
    font-size: 14px;
}

.products {
    background: #fff;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.products .section-header {
    justify-content: center;
    text-align: center;
}

.products .section-title {
    text-align: center;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.product-card:hover {
    border-color: #0066cc;
    box-shadow: 0 20px 40px rgba(0,102,204,0.15);
    transform: translateY(-8px);
}

.product-image {
    width: 100%;
    height: 240px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: #0066cc;
    position: relative;
    overflow: hidden;
}

.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,102,204,0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.product-card:hover .product-image::after {
    opacity: 1;
}

.product-info {
    padding: 28px;
}

.product-info h5 {
    font-size: 20px;
    color: #111;
    margin-bottom: 12px;
    font-weight: 700;
}

.product-info p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.7;
    font-size: 14px;
}

.product-link {
    color: #0066cc;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
    padding: 8px 0;
}

.product-link:hover {
    gap: 12px;
    color: #0052a3;
}

.product-link::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #0066cc;
    transition: width 0.3s;
    position: absolute;
    bottom: 0;
    left: 0;
}

.product-link {
    position: relative;
}

.product-link:hover::after {
    width: 100%;
}

.news {
    background: #fff;
}

.news .section-header {
    justify-content: center;
    text-align: center;
}

.news .section-title {
    text-align: center;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #e8e8e8;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-color: #0066cc;
}

.news-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #0066cc 0%, #00a8ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: rgba(255,255,255,0.3);
    position: relative;
    overflow: hidden;
}

.news-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.1) 100%);
}

.news-content {
    padding: 28px;
}

.news-date {
    color: #0066cc;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-date::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #0066cc;
    border-radius: 50%;
}

.news-content h5 {
    font-size: 18px;
    color: #111;
    margin-bottom: 12px;
    font-weight: 700;
    line-height: 1.5;
    transition: color 0.3s;
}

.news-card:hover .news-content h5 {
    color: #0066cc;
}

.news-content p {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
}

.about {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e3a5f 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></svg>');
    background-size: 100px 100px;
}

.about .container {
    position: relative;
    z-index: 1;
}

.about .section-header {
    justify-content: center;
    text-align: center;
}

.about .section-title {
    text-align: center;
}

.about .section-title h3,
.about .section-title p {
    color: #fff;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: 40px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
}

.about-content h4 {
    font-size: 32px;
    margin-bottom: 25px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, #a0c4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content p {
    font-size: 18px;
    line-height: 2;
    opacity: 0.9;
    color: rgba(255,255,255,0.85);
}

footer {
    background: #0a0a0a;
    color: #999;
    padding: 70px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-info h4 {
    font-size: 22px;
    color: #fff;
    margin-bottom: 25px;
    font-weight: 700;
}

.footer-info p {
    margin-bottom: 15px;
    font-size: 14px;
    line-height: 1.8;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-info i {
    color: #0066cc;
    width: 16px;
}

.footer-nav h5 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 25px;
    font-weight: 600;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 12px;
}

.footer-nav a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #222;
    padding-top: 30px;
    text-align: center;
    font-size: 14px;
    color: #666;
}

.page-header {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 100px 0;
    color: #fff;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 16px;
    opacity: 0.8;
}

.page-content {
    padding: 70px 0;
}

.filter-section {
    display: flex;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    color: #666;
}

.filter-btn:hover,
.filter-btn.active {
    background: #0066cc;
    border-color: #0066cc;
    color: #fff;
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .top-bar-left {
        gap: 20px;
    }
    
    .product-categories,
    .feature-grid,
    .product-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.product-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-item {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
}

.product-item:hover {
    border-color: #0066cc;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transform: translateY(-5px);
}

.product-item .product-image {
    width: 100%;
    height: 260px;
    background: #f5f7fa;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: #ccc;
}

.product-item .product-info {
    padding: 28px;
}

.product-item .product-info h3 {
    font-size: 20px;
    color: #111;
    margin-bottom: 12px;
    font-weight: 600;
}

.product-item .product-info p {
    color: #777;
    line-height: 1.6;
    font-size: 14px;
}

.news-items {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    transition: all 0.3s;
}

.news-item:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transform: translateX(5px);
}

.news-item .news-image {
    width: 300px;
    min-width: 300px;
    height: 220px;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: rgba(255,255,255,0.2);
}

.news-item .news-content {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-item .news-date {
    color: #0066cc;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
}

.news-item .news-content h3 {
    font-size: 22px;
    color: #111;
    margin-bottom: 15px;
    font-weight: 600;
}

.news-item .news-content p {
    color: #777;
    font-size: 15px;
    line-height: 1.7;
}

.about-content-page {
    max-width: 900px;
    margin: 0 auto;
}

.about-content-page h3 {
    font-size: 28px;
    color: #111;
    margin-bottom: 20px;
    font-weight: 700;
}

.about-content-page h4 {
    font-size: 22px;
    color: #111;
    margin: 35px 0 15px;
    font-weight: 600;
}

.about-content-page p {
    color: #555;
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 20px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3,
.contact-form h3 {
    font-size: 24px;
    color: #111;
    margin-bottom: 30px;
    font-weight: 600;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #555;
    font-size: 15px;
    margin-bottom: 20px;
}

.contact-info i {
    color: #0066cc;
    width: 20px;
    font-size: 18px;
}

.success-message {
    background: #e6f7ff;
    border: 1px solid #91d5ff;
    color: #0050b3;
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.form-group label {
    display: block;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0066cc;
}

.no-data {
    text-align: center;
    padding: 80px 0;
    color: #999;
    font-size: 16px;
}

/* Hero Popup Modal */
.hero-popup-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.hero-popup-modal.active {
    display: flex;
}

.hero-popup-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.hero-popup-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: #fff;
    font-size: 36px;
    cursor: pointer;
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-popup-close:hover {
    color: #ccc;
}

#heroPopupBody img,
#heroPopupBody video {
    display: block;
    max-width: 90vw;
    max-height: 85vh;
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 30px 30px;
        z-index: 999;
        gap: 0;
        overflow-y: auto;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links > li > a {
        padding: 15px 0;
        border-bottom: 1px solid #eee;
        font-size: 16px;
    }
    
    .nav-dropdown {
        position: static;
        display: none;
        box-shadow: none;
        padding: 0 0 0 15px;
        background: #f8f9fa;
        margin: 5px 0;
        border-radius: 4px;
    }
    
    .nav-links > li:hover .nav-dropdown {
        display: none;
    }
    
    .nav-links > li.dropdown-open .nav-dropdown {
        display: block;
    }
    
    .nav-dropdown a {
        padding: 12px 15px;
        border-bottom: 1px solid #eee;
    }
    
    .nav-dropdown a:last-child {
        border-bottom: none;
    }
    
    .menu-toggle {
        display: flex;
        z-index: 1000;
        position: relative;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .top-bar-left {
        gap: 20px;
    }
    
    /* 平板版产品分类改为1列 */
    .product-categories {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-grid,
    .news-grid,
    .product-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid,
    .contact-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-item .news-image {
        width: 100%;
        min-width: auto;
        height: 220px;
    }
    
    /* 平板版首页优化 */
    .hero {
        height: 500px;
    }
    
    .hero-content {
        padding: 0 30px;
        text-align: center;
        align-items: center;
    }
    
    .hero-content h2 {
        font-size: 40px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .product-category {
        padding: 40px 35px;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
    }
    
    body {
        padding-top: 70px;
    }
    
    .hero {
        height: 100vh;
        min-height: 500px;
        max-height: 700px;
    }
    
    .hero-content {
        padding: 0 25px;
        text-align: center;
        align-items: center;
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 32px;
        line-height: 1.3;
        margin-bottom: 20px;
    }
    
    .hero-content p {
        font-size: 16px;
        line-height: 1.8;
        margin-bottom: 35px;
        max-width: 100%;
    }
    
    .btn {
        padding: 14px 40px;
        font-size: 16px;
    }
    
    section {
        padding: 50px 0;
    }
    
    .section-header {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        text-align: center;
        margin-bottom: 40px;
    }
    
    .section-title h3 {
        font-size: 26px;
        margin-bottom: 8px;
    }
    
    .section-title p {
        font-size: 14px;
    }
    
    /* 产品分类手机版 */
    .product-categories {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-category {
        padding: 30px 25px;
    }
    
    .product-category h4 {
        font-size: 22px;
        margin-bottom: 20px;
    }
    
    .product-category h4::before {
        height: 24px;
    }
    
    .product-category li {
        margin-bottom: 12px;
    }
    
    .product-category a {
        font-size: 15px;
    }
    
    /* 核心优势手机版 */
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .feature-item {
        padding: 25px 15px;
    }
    
    .feature-number {
        font-size: 32px;
    }
    
    .feature-item h4 {
        font-size: 15px;
        margin-bottom: 8px;
    }
    
    .feature-item p {
        font-size: 12px;
        line-height: 1.6;
    }
    
    /* 产品列表手机版 */
    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-card {
        display: flex;
        flex-direction: row;
        align-items: stretch;
    }
    
    .product-image {
        width: 120px;
        min-width: 120px;
        height: auto;
        font-size: 36px;
    }
    
    .product-info {
        flex: 1;
        padding: 20px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    
    .product-info h5 {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .product-info p {
        font-size: 13px;
        margin-bottom: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    /* 新闻手机版 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-image {
        height: 160px;
    }
    
    .news-content {
        padding: 20px;
    }
    
    .news-content h5 {
        font-size: 16px;
    }
    
    /* 关于我们手机版 */
    .about-content {
        padding: 25px 20px;
    }
    
    .about-content h4 {
        font-size: 22px;
        margin-bottom: 15px;
    }
    
    .about-content p {
        font-size: 15px;
        line-height: 1.8;
    }
    
    /* 页脚手机版 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-info p {
        justify-content: center;
    }
    
    .footer-nav h5 {
        margin-bottom: 15px;
    }
}