/* styles.css - Huanyun Cloud (寰宇云) Premium Sci-Fi Theme Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
    --bg-dark: #f0f9ff;
    --bg-deep: #e0f2fe;
    --card-bg: rgba(255, 255, 255, 0.72);
    --card-bg-hover: rgba(255, 255, 255, 0.90);
    --card-border: rgba(14, 165, 233, 0.15);
    --card-border-active: rgba(14, 165, 233, 0.55);
    
    --primary-cyan: #0284c7;
    --accent-blue: #0369a1;
    --gradient-glow: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    --gradient-text: linear-gradient(135deg, #0369a1 30%, #4f46e5 100%);
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #475569;
    
    --danger-red: #f43f5e;
    --success-green: #10b981;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    scroll-behavior: smooth;
}

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

/* Typography Helpers */
h1, h2, h3, h4, .outfit-font {
    font-family: 'Outfit', sans-serif;
}

.gradient-text {
    background: var(--gradient-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.gradient-text-alt {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Layout Elements */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 6rem 0;
    position: relative;
    z-index: 1;
}

/* Navigation Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(240, 249, 255, 0.90);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition-normal);
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.6rem;
    font-weight: 900;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-svg {
    width: 38px;
    height: 38px;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.6));
}

.logo span {
    font-size: 1.4rem;
}

.nav-menu {
    display: flex;
    gap: 2.2rem;
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-cta {
    background: var(--gradient-glow);
    color: var(--bg-dark);
    padding: 0.65rem 1.4rem;
    border-radius: 99px;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.25);
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

.nav-cta:hover {
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.5);
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 6px 0;
    transition: var(--transition-normal);
}

/* Hero Section */
.hero {
    min-height: 95vh;
    display: flex;
    align-items: center;
    padding-top: 130px;
    padding-bottom: 5rem;
}

.hero-content {
    text-align: center;
    max-width: 850px;
    margin: 0 auto;
}

.badge {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.3);
    color: var(--primary-cyan);
    padding: 0.45rem 1.2rem;
    border-radius: 99px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 2rem;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.1);
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    font-size: 1.35rem;
    color: var(--text-secondary);
    margin-bottom: 2.2rem;
    font-weight: 400;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.cta-group {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.4rem;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    gap: 10px;
}

.btn-primary {
    background: var(--gradient-glow);
    color: var(--bg-dark);
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 30px rgba(0, 242, 254, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(0, 242, 254, 0.3);
    transform: translateY(-2px);
}

/* Pain Points Section */
.section-header {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 4.5rem;
}

.section-header h2 {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.2rem;
}

.pain-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-normal);
}

.pain-card:hover {
    border-color: rgba(244, 63, 94, 0.25);
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(244, 63, 94, 0.06);
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.8rem;
    font-size: 1.6rem;
}

.icon-red {
    background: rgba(244, 63, 94, 0.08);
    color: var(--danger-red);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.icon-green {
    background: rgba(16, 185, 129, 0.08);
    color: var(--success-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.pain-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.pain-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.75;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.2rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-border-active);
    background: var(--card-bg-hover);
    box-shadow: 0 20px 40px rgba(0, 242, 254, 0.06);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(0, 242, 254, 0.06);
    border: 1px solid rgba(0, 242, 254, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    margin-bottom: 1.8rem;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon-wrap {
    background: var(--gradient-glow);
    color: var(--bg-dark);
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.35);
}

.feature-card h3 {
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.75;
}

/* GEO Section */
.geo-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4.5rem;
    align-items: center;
}

.geo-text h2 {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

.geo-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.geo-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.8rem;
}

.stat-item {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--card-border);
    padding: 1.8rem 1.5rem;
    border-radius: 16px;
    backdrop-filter: blur(8px);
}

.stat-num {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--primary-cyan);
    margin-bottom: 0.4rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* Interactive Map Graphic */
.geo-visual {
    position: relative;
    aspect-ratio: 4/3;
    background: radial-gradient(circle at center, #f0f9ff 0%, #bae6fd 100%);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.map-svg {
    width: 90%;
    height: 90%;
    opacity: 0.3;
}

.map-node {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-blue);
    cursor: pointer;
}

.map-node.active {
    background-color: var(--primary-cyan);
    box-shadow: 0 0 18px var(--primary-cyan);
    animation: nodePulse 2s infinite;
}

.map-node-label {
    position: absolute;
    transform: translate(-50%, -100%);
    margin-top: -10px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--primary-cyan);
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-primary);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.map-node:hover .map-node-label {
    opacity: 1;
}

@keyframes nodePulse {
    0% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
    70% { transform: scale(1.3); opacity: 0.8; box-shadow: 0 0 0 14px rgba(0, 242, 254, 0); }
    100% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}

.map-connection-line {
    position: absolute;
    background: linear-gradient(90deg, var(--primary-cyan) 0%, transparent 100%);
    height: 1.5px;
    transform-origin: left center;
    pointer-events: none;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.8rem;
    align-items: stretch;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3.5rem 2rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card.popular {
    border: 2px solid var(--primary-cyan);
    box-shadow: 0 20px 45px rgba(0, 242, 254, 0.12);
    transform: scale(1.02);
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    z-index: 2;
}

.popular-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-glow);
    color: var(--bg-dark);
    padding: 0.5rem 1.6rem;
    border-radius: 99px;
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.35);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.pricing-card:hover {
    transform: translateY(-6px);
}

.pricing-card.popular:hover {
    transform: scale(1.02) translateY(-6px);
    box-shadow: 0 25px 50px rgba(0, 242, 254, 0.2);
}

.plan-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
}

.plan-price-wrap {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin: 1.8rem 0 0.5rem;
}

.currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price {
    font-size: 3.2rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
}

.period {
    font-size: 1rem;
    color: var(--text-muted);
}

.alternative-price {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.plan-limits {
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.2);
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    display: inline-block;
    color: var(--primary-cyan);
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 2.2rem;
    text-align: center;
}

.plan-features {
    list-style: none;
    margin-bottom: 3.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.plan-features svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--primary-cyan);
    margin-top: 3px;
}

.plan-btn {
    width: 100%;
}

/* Articles Section */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2.2rem;
}

.article-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.article-card:hover {
    border-color: var(--card-border-active);
    transform: translateY(-4px);
    background: var(--card-bg-hover);
    box-shadow: 0 15px 30px rgba(0, 242, 254, 0.05);
}

.article-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--primary-cyan);
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 0.8rem;
}

.article-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
    line-height: 1.6;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.read-more {
    color: var(--primary-cyan);
    text-decoration: none;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.article-card:hover .read-more {
    gap: 10px;
    color: var(--text-primary);
}

/* Testimonials Section */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2.2rem;
}

.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.testimonial-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--card-bg-hover);
    transform: translateY(-4px);
}

.rating {
    display: flex;
    gap: 4px;
    color: #fbbf24;
    margin-bottom: 1.5rem;
}

.testimonial-quote {
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 2.2rem;
    font-style: italic;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 16px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--bg-dark);
}

.user-info h4 {
    font-size: 1rem;
    font-weight: 700;
}

.user-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-accordion {
    max-width: 850px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--card-border-active);
}

.faq-header {
    width: 100%;
    padding: 1.6rem 2.2rem;
    background: none;
    border: none;
    color: var(--text-primary);
    text-align: left;
    font-size: 1.15rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    outline: none;
}

.faq-arrow {
    width: 20px;
    height: 20px;
    color: var(--primary-cyan);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

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

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-body {
    padding: 0 2.2rem 1.6rem;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    border-top: 1px solid var(--card-border);
}

/* Footer Section */
footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--card-border);
    padding: 5rem 0 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    max-width: 550px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-top: 1rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-end;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-cyan);
}

.footer-copyright {
    border-top: 1px solid var(--card-border);
    padding-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-seo-meta {
    max-width: 900px;
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--text-muted);
    opacity: 0.8;
}

/* Responsive Navigation for Mobile */
@media (max-width: 991px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(240, 249, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 3rem 1.5rem;
        gap: 2rem;
        z-index: 99;
        transform: translateY(-120%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-bottom: 1px solid var(--card-border);
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .hamburger {
        display: block;
    }
    
    .geo-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        align-items: flex-start;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.8rem;
    }
    .hero-subtitle {
        font-size: 1.15rem;
    }
    .section-header h2 {
        font-size: 2.1rem;
    }
    .pricing-card.popular {
        transform: scale(1);
    }
    .pricing-card.popular:hover {
        transform: translateY(-6px);
    }
    .pricing-grid {
        gap: 2rem;
    }
}

/* Article Template Layout (Portal Layout) */
.portal-layout {
    max-width: 1400px;
    margin: 130px auto 4rem;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 1024px) {
    .portal-layout {
        grid-template-columns: 1fr;
        margin-top: 110px;
    }
    .airport-sidebar {
        display: none;
    }
}

.airport-sidebar {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.8rem;
    position: sticky;
    top: 110px;
}

.airport-sidebar h3 {
    font-size: 1.15rem;
    color: var(--primary-cyan);
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.5px;
}

.airport-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.airport-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 10px;
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.airport-link:hover, .airport-link.active {
    background: rgba(0, 242, 254, 0.08);
    border-color: rgba(0, 242, 254, 0.35);
    color: var(--text-primary);
    transform: translateX(4px);
}

/* Article Detail Content styling */
.portal-content {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

@media (max-width: 768px) {
    .portal-content {
        padding: 2rem 1.5rem;
    }
}

.article-hero {
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    padding-bottom: 2rem;
    margin-bottom: 2.5rem;
}

.article-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 1.2rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.article-meta-info {
    display: flex;
    gap: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.article-meta-info span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.tldr-box {
    background: rgba(0, 242, 254, 0.04);
    border: 1px solid rgba(0, 242, 254, 0.25);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 24px rgba(0, 242, 254, 0.03);
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
}

.tldr-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tldr-box li {
    font-size: 1.05rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-secondary);
}

.tldr-box li strong {
    color: var(--primary-cyan);
    min-width: 90px;
    flex-shrink: 0;
}

.tldr-box a {
    color: var(--primary-cyan);
    font-weight: 700;
    text-decoration: underline;
}

.tldr-box a:hover {
    color: var(--text-primary);
}

/* Rich text tags inside articles */
.article-body h2 {
    color: var(--text-primary);
    font-size: 1.7rem;
    margin-top: 3rem;
    margin-bottom: 1.2rem;
    border-left: 4px solid var(--primary-cyan);
    padding-left: 12px;
}

.article-body h3 {
    color: var(--primary-cyan);
    font-size: 1.3rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-body p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

.article-body ul, .article-body ol {
    margin-left: 1.5rem;
    margin-bottom: 1.8rem;
}

.article-body li {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

.article-body a {
    color: var(--primary-cyan);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px dashed var(--primary-cyan);
    transition: var(--transition-fast);
}

.article-body a:hover {
    color: var(--text-primary);
    border-bottom-style: solid;
}

/* Article pricing table */
.article-pricing-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2.5rem 0;
    background: rgba(255, 255, 255, 0.55);
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.article-pricing-table th, .article-pricing-table td {
    padding: 1.2rem 1.4rem;
    text-align: left;
    border-bottom: 1px solid rgba(14, 165, 233, 0.1);
}

.article-pricing-table th {
    background: rgba(0, 242, 254, 0.06);
    color: var(--primary-cyan);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.article-pricing-table tr:last-child td {
    border-bottom: none;
}

.article-pricing-table tr:hover td {
    background: rgba(255, 255, 255, 0.6);
}

.article-body .price-tag {
    color: var(--primary-cyan);
    font-weight: 700;
    font-size: 1.1rem;
}

/* Pros and Cons layout inside articles */
.article-pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2.5rem 0;
}

@media (max-width: 768px) {
    .article-pros-cons {
        grid-template-columns: 1fr;
    }
}

.pro-box, .con-box {
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 16px;
}

.pro-box h4 {
    color: var(--success-green);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.con-box h4 {
    color: var(--danger-red);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pro-box ul, .con-box ul {
    list-style: none;
    margin-left: 0;
    margin-bottom: 0;
}

.pro-box li, .con-box li {
    font-size: 0.98rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0.8rem;
}

.pro-box li::before {
    content: '✓';
    color: var(--success-green);
    font-weight: 800;
}

.con-box li::before {
    content: '✗';
    color: var(--danger-red);
    font-weight: 800;
}

/* Bottom CTA in Articles */
.article-cta-btn {
    display: block;
    width: 100%;
    max-width: 480px;
    margin: 3.5rem auto 1rem;
    padding: 1.2rem;
    text-align: center;
    background: var(--gradient-glow);
    color: var(--bg-dark);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 800;
    border-radius: 14px;
    box-shadow: 0 10px 25px rgba(0, 242, 254, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 242, 254, 0.5);
    color: var(--bg-dark);
}

.pricing-card.popular .plan-title {
    color: #ffffff !important;
}
.pricing-card.popular .currency,
.pricing-card.popular .price {
    color: #ffffff !important;
}
.pricing-card.popular .plan-features li {
    color: rgba(255, 255, 255, 0.85) !important;
}