/* ==================== CSS Variables ==================== */
:root {
    /* Primary Colors - Monero Orange */
    --color-primary: #FF6600;
    --color-primary-light: #FF8533;
    --color-primary-dark: #E65C00;
    --color-primary-rgb: 255, 102, 0;

    /* Backgrounds */
    --color-bg-dark: #0D0D0D;
    --color-bg-darker: #080808;
    --color-bg-card: #161616;
    --color-bg-card-hover: #1A1A1A;
    --color-bg-elevated: #1E1E1E;

    /* Text */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A0A0A0;
    --color-text-muted: #666666;

    /* Borders */
    --color-border: #2A2A2A;
    --color-border-light: #333333;

    /* Status */
    --color-success: #00C853;
    --color-error: #FF5252;
    --color-warning: #FFB300;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 102, 0, 0.3);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Layout */
    --header-height: 72px;
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==================== Container ==================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ==================== Header ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(13, 13, 13, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo:hover {
    color: var(--color-text-primary);
}

.logo-icon {
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    align-items: baseline;
}

.logo-highlight {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    padding: 4px;
}

.nav-toggle-line {
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--spacing-sm) 0;
    position: relative;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lang-switcher {
    margin-right: var(--spacing-sm);
}

.lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-primary {
    color: #000;
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    color: #000;
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-glow);
}

.btn-outline {
    color: var(--color-text-primary);
    background: transparent;
    border: 2px solid var(--color-border-light);
}

.btn-outline:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-ghost {
    color: var(--color-text-secondary);
    background: transparent;
    border: 2px solid transparent;
}

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

.tor-btn {
    color: #9B59B6;
    border-color: #9B59B6;
}

.tor-btn:hover {
    color: #9B59B6;
    background: rgba(155, 89, 182, 0.1);
    border-color: #9B59B6;
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(255, 102, 0, 0.15), transparent);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 102, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 102, 0, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: linear-gradient(to bottom, white, transparent 80%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(255, 102, 0, 0.1);
    border: 1px solid rgba(255, 102, 0, 0.3);
    border-radius: var(--radius-full);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, #fff 0%, #ccc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

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

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ==================== Section Common ==================== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

/* ==================== Features Section ==================== */
.features {
    background: var(--color-bg-darker);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    background: rgba(255, 102, 0, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-primary);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-icon.icon-tor {
    background: rgba(155, 89, 182, 0.1);
    color: #9B59B6;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==================== Comparison Section ==================== */
.comparison {
    background: var(--color-bg-dark);
}

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

.compare-description {
    text-align: center;
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.compare-table-wrapper {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.compare-table th,
.compare-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.compare-table th {
    font-weight: 600;
    background: var(--color-bg-elevated);
}

.compare-table th.highlight {
    background: rgba(255, 102, 0, 0.1);
    color: var(--color-primary);
}

.compare-table td:first-child {
    text-align: left;
    font-weight: 500;
}

.compare-table td.highlight {
    background: rgba(255, 102, 0, 0.05);
}

.compare-yes {
    color: var(--color-error);
}

.compare-no {
    color: var(--color-success);
}

.compare-table td.highlight .compare-yes {
    color: var(--color-success);
}

.compare-table td.highlight .compare-no {
    color: var(--color-success);
}

/* ==================== Products Section ==================== */
.products {
    background: var(--color-bg-darker);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.product-card {
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.product-card:hover {
    border-color: var(--color-border-light);
}

.product-card.featured {
    border-color: var(--color-primary);
    box-shadow: 0 0 30px rgba(255, 102, 0, 0.15);
}

.product-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.product-badge {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-full);
}

.product-badge.beta {
    color: #000;
    background: var(--color-primary);
}

.product-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.product-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.product-chains {
    margin-bottom: var(--spacing-lg);
}

.chains-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.chain-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.chain-tag {
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
}

.product-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.product-links .btn {
    flex: 1;
    min-width: 120px;
}

/* ==================== News Section ==================== */
.news-section {
    background: var(--color-bg-dark);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.news-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.news-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.news-card-content {
    padding: var(--spacing-lg);
}

.news-date {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.news-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

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

.news-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
}

.news-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.news-empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-2xl);
}

/* ==================== Learn Section ==================== */
.learn-section {
    background: var(--color-bg-darker);
}

.learn-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.learn-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.learn-card:hover {
    color: var(--color-text-primary);
    border-color: var(--color-primary);
    background: var(--color-bg-card-hover);
}

.learn-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 102, 0, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-primary);
}

.learn-icon svg {
    width: 20px;
    height: 20px;
}

.learn-title {
    flex: 1;
    font-weight: 500;
}

.learn-arrow {
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.learn-arrow svg {
    width: 16px;
    height: 16px;
}

.learn-card:hover .learn-arrow {
    color: var(--color-primary);
    transform: translate(4px, -4px);
}

/* ==================== CTA Section ==================== */
.cta-section {
    background: linear-gradient(135deg, rgba(255, 102, 0, 0.1) 0%, rgba(255, 102, 0, 0.05) 100%);
    border-top: 1px solid rgba(255, 102, 0, 0.2);
    border-bottom: 1px solid rgba(255, 102, 0, 0.2);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ==================== Footer ==================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-logo:hover {
    color: var(--color-text-primary);
}

.footer-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.footer-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-security {
    color: var(--color-success);
    background: rgba(0, 200, 83, 0.1);
}

.badge-tor {
    color: #9B59B6;
    background: rgba(155, 89, 182, 0.1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-col a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

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

.tor-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: #9B59B6 !important;
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.copyright {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-note {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ==================== News List Page ==================== */
.page-header {
    padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    background: var(--color-bg-darker);
    text-align: center;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.page-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.news-list-section {
    padding: var(--spacing-2xl) 0;
}

.news-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.news-list-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.news-list-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.news-list-content {
    padding: var(--spacing-lg);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.news-list-title {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.news-list-title a:hover {
    color: var(--color-primary);
}

.news-list-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== Pagination ==================== */
.pagination {
    margin-top: var(--spacing-2xl);
}

.pagination ul {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
}

.pagination li a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pagination li a:hover,
.pagination li.active a {
    color: var(--color-text-primary);
    border-color: var(--color-primary);
    background: rgba(255, 102, 0, 0.1);
}

.pagination .prev,
.pagination .next {
    padding: 0 var(--spacing-md);
}

.pagination .dots {
    color: var(--color-text-muted);
}

/* ==================== Article Detail ==================== */
.article-header {
    padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-xl);
    background: var(--color-bg-darker);
}

.article-header .container {
    max-width: 800px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.3;
}

.article-content-section {
    padding: var(--spacing-2xl) 0;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-body {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: var(--spacing-2xl) 0 var(--spacing-md);
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.article-body p {
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-body li {
    margin-bottom: var(--spacing-sm);
    list-style-type: disc;
}

.article-body ol li {
    list-style-type: decimal;
}

.article-body a {
    color: var(--color-primary);
    text-decoration: underline;
}

.article-body blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-card);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.article-body code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.2em 0.4em;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
}

.article-body pre {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.article-body pre code {
    padding: 0;
    background: none;
}

.article-footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.article-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

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

/* ==================== About, Terms, Privacy Pages ==================== */
.content-page {
    padding: var(--spacing-2xl) 0;
}

.content-page .container {
    max-width: 800px;
}

.content-page-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.content-page-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: var(--spacing-2xl) 0 var(--spacing-md);
}

.content-page-body h2:first-child {
    margin-top: 0;
}

.content-page-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.content-page-body p {
    margin-bottom: var(--spacing-md);
}

.content-page-body ul,
.content-page-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.content-page-body li {
    margin-bottom: var(--spacing-sm);
    list-style-type: disc;
}

.content-page-body ol li {
    list-style-type: decimal;
}

.content-page-body a {
    color: var(--color-primary);
}

.content-page-body strong {
    color: var(--color-text-primary);
}

.last-updated {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ==================== 404 Page ==================== */
.error-page {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-2xl);
}

.error-content h1 {
    font-size: 6rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.error-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.error-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ==================== Mobile Responsive ==================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-brand {
        max-width: none;
    }
}

@media (max-width: 768px) {
     :root {
        --header-height: 64px;
        --container-padding: 1rem;
    }

    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        width: 32px;
        height: 32px;
        cursor: pointer;
        z-index: 1001;
    }

    .nav-toggle-line {
        width: 22px;
        height: 2px;
        background: var(--color-text-primary);
        border-radius: 2px;
        transition: all var(--transition-fast);
    }

    .nav-toggle.active .nav-toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .nav-toggle-line:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .nav-toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 下拉菜单样式 */
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-card);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        padding: var(--spacing-sm) 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-list {
        display: flex;
        flex-direction: column;
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 12px var(--container-padding);
        font-size: 15px;
        color: var(--color-text-secondary);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-link:hover,
    .nav-link.active {
        color: var(--color-primary);
        background: rgba(255, 102, 0, 0.05);
    }

    .nav-link::after {
        display: none;
    }

    .nav-item:last-child .nav-link {
        border-bottom: none;
    }

    .nav-actions {
        display: flex;
        flex-direction: row;
        padding: var(--spacing-md) var(--container-padding);
        gap: var(--spacing-sm);
        border-top: 1px solid var(--color-border);
    }

    .lang-switcher {
        margin: 0;
    }

    .lang-btn {
        padding: 8px 16px;
    }

    .nav-actions .btn {
        flex: 1;
        padding: 8px 16px;
        font-size: 14px;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--spacing-xl)) 0 var(--spacing-xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

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

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

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

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

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

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

    .compare-table th,
    .compare-table td {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    .product-links {
        flex-direction: column;
    }

    .product-links .btn {
        width: 100%;
    }

    .article-nav {
        flex-direction: column;
    }

    .pagination ul {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

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

    .feature-card {
        padding: var(--spacing-lg);
    }

    .product-card {
        padding: var(--spacing-lg);
    }
}

/* ==================== Utilities ==================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

/* ==================== Animations ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.slide-in {
    animation: slideIn 0.6s ease forwards;
}

/* ==================== Print Styles ==================== */
@media print {
    .header,
    .footer,
    .nav-toggle,
    .hero-bg,
    .cta-section {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    .article-body {
        color: #333;
    }

    a {
        color: #000;
        text-decoration: underline;
    }
}