/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-outline {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
}

.btn-outline:hover {
    background: #667eea;
    color: #fff;
}

.btn-small {
    padding: 8px 20px;
    font-size: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.4);
}

/* ===== 顶部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav ul {
    display: flex;
    gap: 30px;
}

.nav a {
    color: #333;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.nav a.active {
    color: #667eea;
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: #667eea;
}

/* ===== Banner轮播 ===== */
.banner {
    position: relative;
    height: 600px;
    margin-top: 80px;
    overflow: hidden;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.banner-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
}

.banner-slide.active {
    opacity: 1;
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    z-index: 10;
}

.banner-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 20;
}

.banner-dots::before,
.banner-dots::after {
    content: '';
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s ease;
}

.banner-dots::before {
    background: #fff;
}

/* ===== 页面横幅 ===== */
.page-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0 60px;
    margin-top: 80px;
    text-align: center;
}

.page-banner h1 {
    font-size: 42px;
    margin-bottom: 10px;
}

.page-banner p {
    font-size: 18px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 3px;
}

/* ===== 通用section ===== */
.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    color: #333;
    margin-bottom: 10px;
}

.section-title p {
    font-size: 16px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.bg-light {
    background: #f8f9fa;
}

/* ===== 公司简介 ===== */
.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.intro-text p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
}

.intro-image img {
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* ===== 产品中心 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon i {
    font-size: 32px;
    color: #fff;
}

.product-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.product-card p {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

/* ===== 核心优势 ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 30px 20px;
}

.advantage-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
}

.advantage-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.advantage-item p {
    font-size: 14px;
    color: #666;
}

/* ===== 应用领域 ===== */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.application-item {
    text-align: center;
    padding: 40px 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
}

.application-item i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 20px;
}

.application-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.application-item p {
    font-size: 14px;
    color: #666;
}

/* ===== 联系信息 ===== */
.contact-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.contact-item i {
    font-size: 24px;
}

.contact-item h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.contact-item p {
    font-size: 14px;
    opacity: 0.9;
}

/* ===== 页脚 ===== */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.footer-info p {
    font-size: 14px;
    opacity: 0.7;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    margin-bottom: 20px;
}

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

.footer-links a {
    font-size: 14px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-contact p {
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 10px;
}

.footer-contact i {
    margin-right: 10px;
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
}

.footer-bottom p {
    font-size: 14px;
    opacity: 0.5;
}

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

.about-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #333;
}

.about-text p {
    margin-bottom: 15px;
    color: #666;
    line-height: 1.8;
}

.about-image img {
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 企业文化 */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.culture-item {
    text-align: center;
    padding: 40px 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-icon i {
    font-size: 32px;
    color: #fff;
}

.culture-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.culture-item p {
    font-size: 14px;
    color: #666;
}

/* 发展历程 */
.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-year {
    position: absolute;
    left: -50px;
    width: 80px;
    height: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.timeline-content {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    margin-left: 50px;
}

.timeline-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.timeline-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 资质荣誉 */
.honors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.honor-item {
    text-align: center;
    padding: 40px 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.honor-item i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 15px;
}

.honor-item p {
    font-size: 14px;
    color: #666;
}

/* ===== 产品页面 ===== */
.product-nav {
    background: #fff;
    padding: 20px 0;
    position: sticky;
    top: 80px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.product-nav ul {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.product-nav a {
    padding: 10px 20px;
    color: #666;
    font-weight: 500;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.product-nav a:hover,
.product-nav a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.product-category {
    margin-bottom: 40px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-icon i {
    font-size: 28px;
    color: #fff;
}

.category-header h2 {
    font-size: 28px;
    color: #333;
}

.category-header p {
    font-size: 14px;
    color: #999;
}

.category-intro {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.category-intro p {
    color: #666;
    line-height: 1.8;
}

.product-table {
    overflow-x: auto;
}

.product-table table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.product-table th,
.product-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.product-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-weight: 600;
}

.product-table tr:hover {
    background: #f8f9fa;
}

.product-table td {
    color: #666;
    font-size: 14px;
}

/* 技术支持 */
.tech-support {
    text-align: center;
    background: #fff;
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.tech-support h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #333;
}

.tech-support > p {
    color: #666;
    margin-bottom: 40px;
}

.support-items {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.support-item {
    padding: 30px;
}

.support-item i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 15px;
}

.support-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.support-item p {
    font-size: 14px;
    color: #666;
}

.support-cta p {
    margin-bottom: 20px;
    color: #666;
}

/* ===== 应用领域页面 ===== */
.intro-text-center {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-size: 18px;
    color: #666;
}

.application-item-alt {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.application-item-alt.reverse {
    direction: rtl;
}

.application-item-alt.reverse > * {
    direction: ltr;
}

.application-image img {
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.application-content .application-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.application-content .application-icon i {
    font-size: 28px;
    color: #fff;
}

.application-content h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 5px;
}

.application-content .subtitle {
    font-size: 14px;
    color: #999;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.application-content > p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 25px;
}

.application-content h3 {
    font-size: 18px;
    color: #333;
    margin: 25px 0 15px;
}

.application-list {
    margin-bottom: 20px;
}

.application-list li {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
}

.application-list i {
    color: #667eea;
    margin-right: 10px;
}

.recommended-products {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product-tag {
    padding: 8px 15px;
    background: #f0f2ff;
    color: #667eea;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.more-applications {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.more-app-item {
    text-align: center;
    padding: 40px 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.more-app-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
}

.more-app-item i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 20px;
}

.more-app-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.more-app-item p {
    font-size: 14px;
    color: #666;
}

/* CTA区域 */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-section .btn-primary {
    background: #fff;
    color: #667eea;
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* ===== 联系我们页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.contact-info-card {
    text-align: center;
    padding: 40px 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.contact-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    font-size: 28px;
    color: #fff;
}

.contact-info-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.contact-info-card p {
    font-size: 14px;
    color: #666;
}

.contact-info-card .small {
    font-size: 13px;
    color: #999;
    margin-top: 5px;
}

/* 联系表单和地图 */
.contact-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-form-wrapper h2,
.map-wrapper h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #333;
}

.contact-form-wrapper > p {
    color: #666;
    margin-bottom: 30px;
}

.contact-form {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.map-container {
    background: #f0f2ff;
    border-radius: 10px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
}

.direction-info {
    margin-top: 30px;
}

.direction-info h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.direction-info p {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
}

.direction-info i {
    color: #667eea;
    margin-right: 10px;
    width: 20px;
}

/* 销售网络 */
.sales-network {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.network-item {
    text-align: center;
    padding: 30px 15px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.network-item i {
    font-size: 32px;
    color: #667eea;
    margin-bottom: 15px;
}

.network-item h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
}

.network-item p {
    font-size: 12px;
    color: #999;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
}

.faq-question h3 {
    font-size: 16px;
    color: #333;
}

.faq-question i {
    color: #667eea;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 25px 20px;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

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

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

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

    .sales-network {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .header .container {
        padding: 12px 20px;
    }

    .nav {
        display: none;
    }

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

    .banner {
        height: 400px;
    }

    .banner-content h2 {
        font-size: 28px;
    }

    .banner-content p {
        font-size: 16px;
    }

    .page-banner h1 {
        font-size: 32px;
    }

    .section {
        padding: 50px 0;
    }

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

    .intro-content,
    .about-content,
    .application-item-alt,
    .contact-main {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .products-grid,
    .advantages-grid,
    .applications-grid,
    .culture-grid,
    .honors-grid,
    .contact-grid,
    .more-applications {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

    .product-nav ul {
        flex-wrap: wrap;
        gap: 10px;
    }

    .support-items {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline-year {
        left: -30px;
        font-size: 12px;
    }

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

@media (max-width: 480px) {
    .banner {
        height: 300px;
    }

    .banner-content h2 {
        font-size: 22px;
    }

    .page-banner {
        padding: 80px 0 40px;
    }

    .page-banner h1 {
        font-size: 26px;
    }

    .btn {
        padding: 10px 25px;
        font-size: 14px;
    }

    .product-card,
    .advantage-item,
    .application-item,
    .culture-item,
    .honor-item,
    .contact-info-card,
    .more-app-item {
        padding: 30px 20px;
    }

    .timeline-content {
        padding: 20px;
    }

    .sales-network {
        grid-template-columns: 1fr;
    }
}