/* ==================== 全局重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style: none;
}

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

/* ==================== 头部导航 ==================== */
.header {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    background: rgba(255, 255, 255, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo h1 {
    color: #0056b3;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0;
}

.logo a:hover h1 {
    color: #004494;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 500;
    font-size: 1rem;
    color: #444;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #0056b3;
    transition: width 0.3s;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: #0056b3;
}

/* 汉堡菜单 (移动端) */
.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px;
    transition: all 0.3s ease;
}

/* 汉堡按钮激活状态 */
.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2 {
    opacity: 0;
}
.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ==================== 页面标题 ==================== */
.page-header {
    background: linear-gradient(135deg, #0056b3 0%, #004494 100%);
    color: #fff;
    padding: 120px 0 60px;
    text-align: center;
    margin-top: 70px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.breadcrumb {
    font-size: 1rem;
    opacity: 0.9;
}

.breadcrumb a {
    color: #fff;
}

.breadcrumb span {
    margin: 0 10px;
}

/* ==================== 英雄横幅 ==================== */
.hero-banner {
    position: relative;
    height: 600px;
    margin-top: 70px;
    overflow: hidden;
    background: linear-gradient(135deg, #0056b3 0%, #003d7a 100%);
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.9s ease;
}

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

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 86, 179, 0.9), rgba(0, 61, 122, 0.8));
    z-index: 1;
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.banner-content h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: bold;
}

.banner-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    gap: 10px;
}

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

.banner-dots .dot.active {
    background: #fff;
    transform: scale(1.2);
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    background: #ff9800;
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
}

.btn:hover {
    background: #e68900;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 152, 0, 0.3);
}

.btn-sm {
    display: inline-block;
    margin-top: 10px;
    color: #0056b3;
    font-weight: 600;
    font-size: 0.9rem;
}

.btn-sm:hover {
    text-decoration: underline;
}

/* ==================== 通用区块样式 ==================== */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: #0056b3;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #ff9800;
    margin: 15px auto 0;
}

.bg-light {
    background-color: #f9f9f9;
}

/* ==================== 公司简介预览 ==================== */
.about-preview {
    display: flex;
    gap: 50px;
    align-items: center;
    flex-wrap: wrap;
}

.about-preview .about-image {
    flex: 1;
    min-width: 300px;
}

.about-preview .about-text {
    flex: 1;
    min-width: 300px;
}

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

.feature-list {
    margin: 20px 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: #555;
}

.feature-list .icon {
    color: #0056b3;
    font-weight: bold;
}

/* ==================== 产品网格 ==================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
    text-align: center;
    padding-bottom: 20px;
    border: 1px solid #eee;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.card-img {
    height: 180px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    margin-bottom: 15px;
    font-size: 0.9rem;
    font-weight: 500;
}

.product-card h3 {
    margin-bottom: 10px;
    color: #333;
    font-size: 1.15rem;
    padding: 0 15px;
}

.product-card p {
    padding: 0 15px;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 0 15px;
}

.spec-tag {
    background: #f0f0f0;
    color: #666;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
}

.category-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #666;
    line-height: 1.8;
}

/* ==================== 产品分类导航 ==================== */
.product-nav {
    background: #f5f5f5;
    padding: 20px 0;
    border-bottom: 1px solid #e0e0e0;
}

.product-nav-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.product-nav-list a {
    padding: 10px 25px;
    border-radius: 25px;
    transition: all 0.3s;
    color: #555;
}

.product-nav-list a:hover,
.product-nav-list a.active {
    background: #0056b3;
    color: #fff;
}

/* ==================== 认证列表 ==================== */
.certification-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 30px;
}

.cert-item {
    text-align: center;
}

.cert-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, #0056b3, #004494);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 0.9rem;
}

.cert-item p {
    color: #666;
    font-size: 0.9rem;
}

/* ==================== 新闻网格 ==================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-item {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.news-item:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.news-date {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 15px;
}

.news-date .day {
    font-size: 2rem;
    font-weight: bold;
    color: #0056b3;
}

.news-date .month {
    font-size: 0.85rem;
    color: #888;
}

.news-item h3 {
    margin-bottom: 10px;
    color: #333;
    font-size: 1.1rem;
}

.news-item p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.read-more {
    color: #0056b3;
    font-weight: 500;
    font-size: 0.9rem;
}

.read-more:hover {
    text-decoration: underline;
}

/* ==================== 快速联系 ==================== */
.quick-contact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.contact-card {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

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

.contact-card p {
    color: #666;
}

/* ==================== 联系页面 ==================== */
.contact-page-wrapper {
    display: flex;
    gap: 40px;
}

.contact-main {
    flex: 1;
    min-width: 300px;
}

.contact-sidebar {
    width: 300px;
    flex-shrink: 0;
}

.contact-section {
    margin-bottom: 50px;
}

.contact-section h2 {
    font-size: 1.5rem;
    color: #0056b3;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.contact-info-card {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
}

.contact-icon-large {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.contact-info-card h3 {
    font-size: 1rem;
    color: #333;
    margin-bottom: 10px;
}

.contact-value {
    font-size: 1.2rem;
    color: #0056b3;
    font-weight: bold;
    margin-bottom: 5px;
}

.contact-note {
    font-size: 0.85rem;
    color: #888;
}

.address-info {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.address-text {
    flex: 1;
    min-width: 250px;
}

.address-text h3 {
    color: #0056b3;
    margin-bottom: 15px;
}

.address-text p {
    margin-bottom: 10px;
    color: #555;
}

.map-placeholder {
    flex: 1;
    min-width: 250px;
}

/* ==================== 表单样式 ==================== */
.contact-form-full {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0056b3;
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

/* ==================== 侧边栏 ==================== */
.sidebar-card {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.sidebar-card h3 {
    font-size: 1.1rem;
    color: #0056b3;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
}

.quick-links li {
    margin-bottom: 12px;
}

.quick-links a {
    color: #555;
    transition: color 0.3s;
}

.quick-links a:hover {
    color: #0056b3;
}

.sidebar-card.highlight {
    background: linear-gradient(135deg, #0056b3, #004494);
    color: #fff;
}

.sidebar-card.highlight h3 {
    color: #fff;
    border-bottom-color: rgba(255,255,255,0.3);
}

.service-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.service-list .check {
    color: #4caf50;
    font-weight: bold;
}

.working-hours {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.hours-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.hours-day {
    font-weight: 500;
    color: #333;
}

.hours-time {
    color: #0056b3;
}

.contact-widget p {
    margin-bottom: 10px;
    color: #555;
}

/* ==================== 新闻页面 ==================== */
.news-container {
    display: flex;
    gap: 40px;
}

.news-main {
    flex: 1;
    min-width: 300px;
}

.news-sidebar {
    width: 300px;
    flex-shrink: 0;
}

.news-article {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.news-image {
    /* height: 250px; */
    background: #f5f5f5;
    overflow: hidden;
}

.news-content {
    padding: 25px;
}

.news-content h2 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
}

.news-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.85rem;
}

.news-date {
    color: #888;
}

.news-category {
    color: #0056b3;
    background: #e8f4fd;
    padding: 2px 10px;
    border-radius: 12px;
}

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

.news-content ol,
.news-content ul {
    margin: 15px 0;
    padding-left: 20px;
}

.news-content li {
    color: #666;
    margin-bottom: 8px;
    line-height: 1.6;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.page-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: all 0.3s;
}

.page-item:hover,
.page-item.active {
    background: #0056b3;
    color: #fff;
    border-color: #0056b3;
}

.category-list li,
.popular-list li {
    margin-bottom: 12px;
}

.category-list a,
.popular-list a {
    color: #555;
    transition: color 0.3s;
    display: block;
}

.category-list a:hover,
.category-list a.active,
.popular-list a:hover {
    color: #0056b3;
}

.popular-date {
    display: block;
    font-size: 0.8rem;
    color: #999;
    margin-top: 5px;
}

/* ==================== 关于页面 ==================== */
.about-content {
    display: flex;
    gap: 50px;
    align-items: flex-start;
    flex-wrap: wrap;
}

.about-image {
    flex: 1;
    min-width: 300px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h2 {
    color: #0056b3;
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #555;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.culture-item {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.culture-item h3 {
    color: #0056b3;
    margin-bottom: 15px;
}

.culture-item p {
    color: #666;
    line-height: 1.6;
}

.production-info {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 50px;
}

.production-item {
    text-align: center;
}

.production-number {
    font-size: 3rem;
    font-weight: bold;
    color: #0056b3;
}

.production-label {
    color: #666;
    margin-top: 10px;
}

.workshop-list {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 30px;
}

.workshop-list h3 {
    color: #0056b3;
    margin-bottom: 20px;
}

.workshop-list ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.workshop-list li {
    padding: 10px 15px;
    background: #fff;
    border-radius: 4px;
    color: #555;
}

.certification-detail {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.cert-category {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.cert-category h3 {
    color: #0056b3;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
}

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

.cert-category li {
    padding: 8px 0;
    color: #555;
    border-bottom: 1px dashed #e0e0e0;
}

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

.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.application-item {
    text-align: center;
    background: #fff;
    border-radius: 8px;
    padding: 30px 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.application-item h3 {
    color: #0056b3;
    margin-bottom: 10px;
}

.application-item p {
    color: #666;
    font-size: 0.9rem;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: #e0e0e0;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-year {
    position: absolute;
    right: 50%;
    transform: translateX(50%);
    background: #0056b3;
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    z-index: 1;
}

.timeline-content {
    background: #fff;
    border-radius: 8px;
    padding: 20px 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    max-width: 350px;
}

.timeline-content h3 {
    color: #0056b3;
    margin-bottom: 10px;
}

.timeline-content p {
    color: #666;
    line-height: 1.6;
}

/* ==================== CTA Box ==================== */
.cta-box {
    background: linear-gradient(135deg, #0056b3, #004494);
    border-radius: 8px;
    padding: 50px;
    text-align: center;
    color: #fff;
}

.cta-box h2 {
    margin-bottom: 15px;
}

.cta-box p {
    margin-bottom: 25px;
    opacity: 0.9;
}

.cta-box .btn {
    background: #fff;
    color: #0056b3;
}

.cta-box .btn:hover {
    background: #f5f5f5;
}

/* ==================== 占位图 ==================== */
.img-placeholder {
    /* min-height: 200px; */
    width: 100%;
    background-size: cover;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    /* padding: 20px; */
}

/* ==================== 页脚 ==================== */
.footer {
    background: #222;
    color: #ccc;
    padding: 50px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    color: #fff;
    margin-bottom: 20px;
}

.footer-section p {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

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

.footer-section a {
    color: #999;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: #888;
}

.footer-bottom a {
    color: #888;
    margin: 0 10px;
}

/* ==================== 响应式设计 ==================== */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: calc(100vh - 70px);
        top: 70px;
        background-color: #fff;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 70%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -2px 0 5px rgba(0,0,0,0.1);
        padding-top: 20px;
    }

    .nav-links li {
        margin: 20px 0;
        opacity: 0;
    }

    .burger {
        display: block;
    }

    .nav-active {
        transform: translateX(0%);
    }

    @keyframes navLinkFade {
        from {
            opacity: 0;
            transform: translateX(50px);
        }
        to {
            opacity: 1;
            transform: translateX(0px);
        }
    }

    .banner-content h2 {
        font-size: 2rem;
    }

    .about-preview,
    .contact-page-wrapper,
    .news-container,
    .about-content {
        flex-direction: column;
    }

    .contact-sidebar,
    .news-sidebar {
        width: 100%;
    }

    .address-info {
        flex-direction: column;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 70px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-year {
        right: auto;
        left: 30px;
        transform: translateX(-50%);
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

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

    .hero-banner {
        height: 400px;
    }
}

@media screen and (max-width: 480px) {
    .banner-content h2 {
        font-size: 1.5rem;
    }

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

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

    .feature-list {
        grid-template-columns: 1fr;
    }
}