/* ========================================
   德恩科技企业官网样式表
   ======================================== */

/* 基础变量 */
:root {
    --primary-color: #1e3a5f;
    --primary-dark: #152a45;
    --primary-light: #2c5282;
    --accent-color: #3182ce;
    --text-color: #333;
    --text-light: #666;
    --text-muted: #999;
    --bg-color: #fff;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --danger-color: #f56565;
    --warning-color: #ed8936;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

ul {
    list-style: none;
}

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

.container {
    margin: 0 auto;
    padding-left: 30px;
    padding-right: 30px;
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

/* ========================================
   区块标题
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.section-header p {
    color: var(--text-light);
    font-size: 16px;
    margin-top: 20px;
}

.section-header.left {
    text-align: left;
}

.section-header.left h2::after {
    left: 0;
    transform: none;
}

/* ========================================
   头部导航
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: white;
    box-shadow: var(--shadow);
    z-index: 1000;
}

.header-top {
    background-color: var(--primary-color);
    padding: 8px 0;
}

.header .container {
    padding-left: 0;
    padding-right: 0;
}

.contact-info {
    display: flex;
    justify-content: flex-end;
    gap: 30px;
    color: white;
    font-size: 14px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.contact-info span i {
    margin-right: 8px;
    color: var(--accent-color);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 60px;
    width: auto;
}

.logo-text h1 {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 700;
    line-height: 1.2;
}

.logo-text span {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* ========================================
   首页Banner
   ======================================== */
.hero {
    margin-top: 110px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    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(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content h2 {
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: 400;
    opacity: 0.9;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 10px;
    opacity: 0.85;
}

.hero-buttons {
    margin-top: 40px;
    display: flex;
    gap: 20px;
    justify-content: center;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

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

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

/* ========================================
   四大核心优势
   ======================================== */
.core-advantages {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.advantage-card {
    background: white;
    padding: 40px 30px;
    text-align: center;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.advantage-icon i {
    font-size: 32px;
    color: white;
}

.advantage-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.advantage-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}

/* ========================================
   公司简介
   ======================================== */
.about {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-light);
    line-height: 1.8;
}

.about-text strong {
    color: var(--primary-color);
}

.culture-section {
    margin-top: 30px;
}

.culture-section h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

.culture-item {
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.culture-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 16px;
}

.culture-item p {
    margin-bottom: 0;
    font-size: 14px;
}

.values {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-color);
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: 500px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    object-fit: contain;
    display: block;
}

/* ========================================
   产品与服务
   ======================================== */
.products {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    height: 240px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-image i {
    font-size: 60px;
    color: white;
    opacity: 0.9;
}

.product-icon-img {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

/* 竖向图片特殊处理 - 完整显示 */
.product-image.portrait {
    height: 320px;
}

.product-image.portrait img {
    width: auto;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.product-card h3 {
    padding: 20px 20px 10px;
    font-size: 18px;
    color: var(--primary-color);
}

.product-card > p {
    padding: 0 20px;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

.product-features {
    padding: 15px 20px 20px;
}

.product-features li {
    padding: 5px 0;
    font-size: 13px;
    color: var(--text-light);
    position: relative;
    padding-left: 15px;
}

.product-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* ========================================
   技术原理
   ======================================== */
.technology {
    padding: 80px 0;
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.tech-problem,
.tech-solution {
    padding: 30px;
    border-radius: 8px;
}

.tech-problem {
    background-color: #fff5f5;
    border-left: 4px solid var(--danger-color);
}

.tech-solution {
    background-color: #f0fff4;
    border-left: 4px solid var(--success-color);
}

.tech-problem h3,
.tech-solution h3 {
    font-size: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tech-problem h3 {
    color: #c53030;
}

.tech-solution h3 {
    color: #276749;
}

.tech-problem h3 i {
    color: var(--danger-color);
}

.tech-solution h3 i {
    color: var(--success-color);
}

.tech-problem ul,
.tech-solution ul {
    list-style: disc;
    padding-left: 20px;
}

.tech-problem li,
.tech-solution li {
    margin-bottom: 10px;
    color: var(--text-light);
    line-height: 1.6;
}

.tech-solution p {
    margin-bottom: 15px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========================================
   产品特点
   ======================================== */
.features {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.feature-item {
    display: flex;
    gap: 20px;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.feature-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-color);
    opacity: 0.3;
    line-height: 1;
}

.feature-content h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.feature-content p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

/* ========================================
   应用领域
   ======================================== */
.applications {
    padding: 80px 0;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.application-card {
    background: white;
    padding: 40px 20px;
    text-align: center;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
}

.application-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.application-card i {
    font-size: 40px;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.application-card h4 {
    color: var(--primary-color);
    font-size: 16px;
}

/* ========================================
   Parylene介绍
   ======================================== */
.parylene {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.parylene-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.parylene-text h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.parylene-text > p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.parylene-features,
.parylene-applications {
    margin-top: 25px;
}

.parylene-features h4,
.parylene-applications h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.parylene-features ul {
    list-style: disc;
    padding-left: 20px;
}

.parylene-features li {
    color: var(--text-light);
    margin-bottom: 8px;
}

.parylene-product {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--accent-color);
}

.parylene-product h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.parylene-product > p {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 20px;
}

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

.parylene-product li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.parylene-product li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.parylene-product li:last-child {
    border-bottom: none;
}

/* ========================================
   深冷机组优势对比
   ======================================== */
.cryo-advantages {
    padding: 80px 0;
}

.comparison-table {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.5fr;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.5fr;
    border-bottom: 1px solid var(--border-color);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-col {
    padding: 20px;
    display: flex;
    align-items: center;
}

.comparison-col:first-child {
    font-weight: 600;
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.comparison-col.cryo {
    color: var(--success-color);
}

.comparison-col.ln2 {
    color: var(--danger-color);
}

.comparison-col i {
    margin-right: 8px;
}

/* ========================================
   联系我们
   ======================================== */
.contact {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-card {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-info-card h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item span {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--text-color);
    font-size: 16px;
    font-weight: 500;
}

/* 产品展示大图 */
.product-showcase {
    padding: 80px 0;
    background-color: white;
}

.showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.showcase-image img {
    width: 100%;
    height: auto;
    max-height: 450px;
    object-fit: cover;
    object-position: center;
    display: block;
    border-radius: 8px;
}

.showcase-text h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.showcase-text > p {
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.showcase-features {
    list-style: none;
}

.showcase-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-color);
    font-size: 16px;
    border-bottom: 1px solid var(--border-color);
}

.showcase-features li:last-child {
    border-bottom: none;
}

.showcase-features li i {
    color: var(--success-color);
    font-size: 18px;
}

/* 生产车间展示 */
.factory-showcase {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.factory-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 3/4;
}

.factory-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: var(--transition);
}

/* 竖向图片完整显示 */
.factory-item.portrait img {
    object-fit: contain;
    background-color: #f5f5f5;
    padding: 10px;
}

.factory-item:hover img {
    transform: scale(1.05);
}

.factory-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(30, 58, 95, 0.9), transparent);
    color: white;
    padding: 30px 20px 20px;
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}

.factory-item:hover .factory-overlay {
    transform: translateY(0);
    opacity: 1;
}

.factory-overlay h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.factory-overlay p {
    font-size: 14px;
    opacity: 0.9;
}

/* 联系我们的图片卡片 */
.contact-image-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.contact-image-card img {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    object-position: center;
    display: block;
    background-color: #f8f9fa;
    padding: 15px;
}

.contact-cta {
    padding: 30px;
    text-align: center;
}

.contact-cta h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-cta p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.contact-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

.footer-section p {
    color: #a0aec0;
    font-size: 14px;
    line-height: 1.8;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
}

.footer-logo h4 {
    margin-bottom: 0;
}

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

.footer-section ul a {
    color: #a0aec0;
    font-size: 14px;
    transition: var(--transition);
}

.footer-section ul a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: #718096;
    font-size: 14px;
}

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

@media (max-width: 768px) {
    .header-top {
        display: none;
    }
    
    .navbar {
        padding: 10px 0;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 20px 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        padding: 15px 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        margin-top: 70px;
        padding: 60px 0;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content h2 {
        font-size: 20px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-content,
    .tech-content,
    .parylene-content,
    .contact-content,
    .showcase-content {
        grid-template-columns: 1fr;
    }
    
    .showcase-image {
        order: -1;
    }
    
    .culture-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid,
    .products-grid,
    .applications-grid,
    .factory-grid {
        grid-template-columns: 1fr;
    }

    .factory-item {
        aspect-ratio: 3/4;
    }

    .product-image.portrait {
        height: 280px;
    }

    .factory-overlay {
        transform: translateY(0);
        opacity: 1;
        padding: 20px;
    }

    .comparison-header,
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .comparison-col:first-child {
        background-color: var(--primary-color);
        color: white;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section-header h2 {
        font-size: 26px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo-img {
        height: 50px;
    }

    .logo-text h1 {
        font-size: 20px;
    }

    .logo-text span {
        font-size: 10px;
    }
    
    .hero-content h1 {
        font-size: 26px;
    }
    
    .section-header h2 {
        font-size: 22px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .advantage-card,
    .product-card,
    .feature-item,
    .contact-info-card,
    .contact-form {
        padding: 20px;
    }
}