:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4aa;
    --accent-color: #ff6b35;
    --dark-bg: #0a0a1a;
    --dark-bg-secondary: #12122a;
    --light-bg: #f8fafc;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-light: #ffffff;
    --text-muted: #8888aa;
    --border-color: #e0e0f0;
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4aa 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a1a 0%, #1a1a3a 100%);
    --shadow-sm: 0 2px 8px rgba(0, 102, 255, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 102, 255, 0.15);
    --shadow-lg: 0 8px 40px rgba(0, 102, 255, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--light-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 0 40px;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-light);
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-list {
    display: flex;
    gap: 4px;
}

.nav-item a {
    display: block;
    padding: 10px 18px;
    color: var(--text-light);
    font-size: 0.95rem;
    border-radius: 8px;
    transition: var(--transition-fast);
}

.nav-item a:hover {
    background: rgba(0, 102, 255, 0.2);
    color: var(--primary-color);
}

.nav-item.active a {
    background: var(--gradient-primary);
    color: var(--text-light);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 20px;
    color: var(--text-light);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lang-switch:hover {
    background: rgba(255,255,255,0.2);
}

.lang-switch select {
    background: transparent;
    border: none;
    color: var(--text-light);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.lang-switch select option {
    background: var(--dark-bg);
    color: var(--text-light);
}

.btn-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.btn-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    transition: var(--transition-fast);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--dark-bg);
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

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

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-nav-item a {
    display: block;
    padding: 12px 16px;
    color: var(--text-light);
    font-size: 1rem;
    border-radius: 8px;
    transition: var(--transition-fast);
}

.mobile-nav-item a:hover {
    background: rgba(0, 102, 255, 0.2);
}

.mobile-nav-recharge {
    display: none;
}

.hero {
    padding: 160px 0 100px;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230066ff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 102, 255, 0.15);
    border: 1px solid rgba(0, 102, 255, 0.3);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: var(--gradient-primary);
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: transparent;
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(0, 102, 255, 0.1);
}

.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--dark-bg);
    color: var(--text-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header h2 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-header p {
    color: var(--text-muted);
}

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

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

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.card {
    background: var(--text-light);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

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

.card-dark {
    background: var(--dark-bg-secondary);
    border: 1px solid rgba(255,255,255,0.1);
}

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 16px;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.card-dark .card-icon {
    background: rgba(0, 102, 255, 0.2);
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.card-dark h3 {
    color: var(--text-light);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.card-dark p {
    color: var(--text-muted);
}

.card-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.feature-card {
    text-align: center;
    padding: 40px 24px;
}

.feature-card .card-icon {
    margin: 0 auto 20px;
}

.stats-section {
    background: var(--gradient-primary);
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    color: var(--text-light);
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

.three-layers {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.layer-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    padding: 40px;
    background: var(--dark-bg-secondary);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition-fast);
}

.layer-item:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.layer-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
}

.layer-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-light);
}

.layer-content p {
    color: var(--text-muted);
    line-height: 1.8;
}

.code-block {
    background: #0d1117;
    border-radius: 12px;
    padding: 24px;
    overflow-x: auto;
    margin: 24px 0;
    border: 1px solid rgba(255,255,255,0.1);
}

.code-block pre {
    color: #c9d1d9;
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-block code {
    color: #c9d1d9;
}

.code-block .comment {
    color: #8b949e;
}

.code-block .key {
    color: #79c0ff;
}

.code-block .string {
    color: #a5d6ff;
}

.footer {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary-color);
}

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a:hover {
    color: var(--primary-color);
}



.page-header {
    padding: 140px 0 60px;
    background: var(--gradient-dark);
    text-align: center;
}

.page-header h1 {
    font-size: 2.8rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb span {
    color: var(--text-muted);
}

.content-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 60px;
}

.sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-menu {
    background: var(--text-light);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.sidebar-menu h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-menu ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-menu a {
    display: block;
    padding: 10px 16px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-radius: 8px;
    transition: var(--transition-fast);
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
}

.content-area {
    min-width: 0;
}

.content-area h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.content-area h3 {
    font-size: 1.4rem;
    margin: 32px 0 16px;
    color: var(--text-primary);
}

.content-area p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.content-area ul {
    margin: 16px 0 24px 24px;
}

.content-area li {
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.content-area li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

.content-area .highlight-box {
    background: rgba(0, 102, 255, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 24px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
}

.content-area .warning-box {
    background: rgba(255, 107, 53, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 24px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
}

.cta-section {
    background: var(--gradient-dark);
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1.1rem;
}

.advantages-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 40px 0;
}

.advantage-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--dark-bg-secondary);
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.1);
}

.advantage-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.2);
    border-radius: 12px;
    font-size: 1.4rem;
}

.advantage-content h4 {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.advantage-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

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

.pricing-card {
    background: var(--text-light);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: var(--transition-fast);
}

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

.pricing-card.featured {
    border-color: var(--primary-color);
    position: relative;
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: '最受欢迎';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: var(--text-light);
    padding: 4px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.pricing-price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-features {
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-secondary);
}

.pricing-features li::before {
    content: '✓';
    color: var(--secondary-color);
    font-weight: 700;
}

.btn-pricing {
    width: 100%;
    padding: 14px 24px;
    background: var(--gradient-primary);
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-pricing:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--text-light);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border-color);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-toggle {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition-fast);
    font-size: 1.2rem;
}

.faq-item.active .faq-toggle {
    background: var(--primary-color);
    color: var(--text-light);
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding-top: 16px;
    margin-top: 16px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    line-height: 1.8;
}

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

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

.blog-card {
    background: var(--text-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

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

.blog-image {
    width: 100%;
    height: 200px;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

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

.blog-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.6);
    color: var(--text-light);
    font-size: 0.8rem;
    border-radius: 20px;
}

.blog-content {
    padding: 24px;
}

.blog-meta {
    display: flex;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.blog-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.5;
}

.blog-card h3 a:hover {
    color: var(--primary-color);
}

.blog-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.blog-read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    color: var(--primary-color);
    font-weight: 600;
}

.blog-read-more:hover {
    gap: 12px;
}

.contact-form {
    background: var(--text-light);
    border-radius: 24px;
    padding: 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-card {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--dark-bg-secondary);
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.1);
}

.contact-info-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.2);
    border-radius: 12px;
    font-size: 1.4rem;
}

.contact-info-content h4 {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.contact-info-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .pricing-card.featured {
        transform: scale(1);
    }
}

@media (max-width: 768px) {
    .header {
        padding: 0 20px;
    }

    .nav {
        display: none;
    }

    .btn-menu {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

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

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .stat-item h3 {
        font-size: 2rem;
    }

    .layer-item {
        flex-direction: column;
        padding: 24px;
    }

    .content-with-sidebar {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

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

    .pricing-cards {
        grid-template-columns: 1fr;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

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

    .page-header h1 {
        font-size: 2rem;
    }
}