/* Import Outfit & Inter Fonts from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* CSS Custom Variables for Theme */
:root {
    --bg-primary: #0a0b10;
    --bg-secondary: #11131e;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-card: rgba(255, 255, 255, 0.08);
    --border-card-hover: rgba(59, 130, 246, 0.3);
    
    --color-primary: #ffffff;
    --color-secondary: #94a3b8;
    --color-accent-blue: #3b82f6;
    --color-accent-cyan: #06b6d4;
    --color-accent-glow: rgba(59, 130, 246, 0.5);
    
    /* Blue-White Gradient Font */
    --gradient-blue-white: linear-gradient(135deg, #60a5fa 0%, #93c5fd 40%, #ffffff 100%);
    --gradient-primary: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --gradient-glow: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 80%);
    
    --font-heading: 'Outfit', 'Inter', -apple-system, sans-serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s ease;
}

/* Reset and Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--color-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-blue);
}

/* Global Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

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

.section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 800;
}

/* Glassmorphism Common Class */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    transition: var(--transition-normal);
}

.glass-panel:hover {
    border-color: var(--border-card-hover);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 9999px;
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: var(--transition-normal);
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(10, 11, 16, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

header.scrolled {
    padding: 0.5rem 0;
    background: rgba(10, 11, 16, 0.95);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
}

.logo svg {
    width: 2.2rem;
    height: 2.2rem;
    fill: var(--color-accent-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--color-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section with Cat Background */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
    overflow: hidden;
    background-image: url('assets/cat-bg.jpg');
    background-size: cover;
    background-position: right 10% center;
    background-repeat: no-repeat;
}

/* Dark Linear Mask Overlay */
.hero-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        rgba(10, 11, 16, 0.98) 0%, 
        rgba(10, 11, 16, 0.92) 35%, 
        rgba(10, 11, 16, 0.6) 65%, 
        rgba(10, 11, 16, 0.2) 100%);
    z-index: 1;
    pointer-events: none;
}

/* Dynamic Particles Canvas Overlay */
#hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.hero-container {
    display: block;
    position: relative;
    z-index: 3;
}

.hero-content {
    max-width: 650px;
    width: 100%;
}

.hero-tagline {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-description {
    color: var(--color-secondary);
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}


/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.feature-card {
    position: relative;
    padding: 2.8rem 1.8rem;
    text-align: left;
    overflow: hidden;
    transform-style: preserve-3d;
    perspective: 1000px;
    transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1), 
                box-shadow 0.5s ease, 
                border-color 0.5s ease;
    animation: autoRotateCard 6s ease-in-out infinite alternate;
}

/* Staggered animation delays for auto-rotation */
.feature-card:nth-child(1) { animation-delay: 0s; }
.feature-card:nth-child(2) { animation-delay: -1.5s; }
.feature-card:nth-child(3) { animation-delay: -3s; }
.feature-card:nth-child(4) { animation-delay: -4.5s; }

.feature-card:hover {
    animation-play-state: paused;
    transform: perspective(1000px) rotateX(10deg) rotateY(-8deg) translateY(-8px);
    box-shadow: 0 20px 45px rgba(6, 182, 212, 0.25), 0 0 30px rgba(59, 130, 246, 0.15);
    border-color: rgba(6, 182, 212, 0.4);
}

/* Responsive Grid breakpoints */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}
@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Background Circuit SVG */
.circuit-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.6;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-card:hover .circuit-bg {
    opacity: 0.95;
    transform: scale(1.05) translateZ(-10px);
}

.feature-icon {
    position: relative;
    z-index: 1;
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.08);
    transform: translateZ(40px);
    transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1), 
                box-shadow 0.5s ease, 
                border-color 0.5s ease;
}

.feature-card:hover .feature-icon {
    transform: translateZ(65px) scale(1.08);
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
    border-color: rgba(6, 182, 212, 0.6);
}

.feature-icon svg {
    width: 2.2rem;
    height: 2.2rem;
    fill: none;
}

/* Electronic Core Ring & Core Animations */
.feature-icon .tech-ring {
    transform-origin: center;
    animation: spinRing 12s linear infinite;
    color: var(--color-accent-cyan);
}

.feature-icon .tech-core {
    transform-origin: center;
    animation: pulseCore 3s ease-in-out infinite;
    color: var(--color-accent-blue);
}

.feature-card h3 {
    position: relative;
    z-index: 1;
    font-size: 1.3rem;
    margin-bottom: 0.85rem;
    transform: translateZ(30px);
    transition: transform 0.5s ease;
}

.feature-card:hover h3 {
    transform: translateZ(45px);
}

.feature-card p {
    position: relative;
    z-index: 1;
    color: var(--color-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    transform: translateZ(15px);
    transition: transform 0.5s ease;
}

.feature-card:hover p {
    transform: translateZ(25px);
}

/* Animations */
@keyframes spinRing {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulseCore {
    0%, 100% {
        transform: scale(0.95);
        filter: drop-shadow(0 0 2px rgba(59, 130, 246, 0.4));
        opacity: 0.8;
    }
    50% {
        transform: scale(1.05);
        filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.8));
        opacity: 1;
    }
}

@keyframes autoRotateCard {
    0% {
        transform: perspective(1000px) rotateX(1.8deg) rotateY(-1.8deg) translateY(0);
    }
    50% {
        transform: perspective(1000px) rotateX(-1.8deg) rotateY(1.8deg) translateY(-3px);
    }
    100% {
        transform: perspective(1000px) rotateX(1.8deg) rotateY(-1.8deg) translateY(0);
    }
}


/* Interactive Pricing Section & Calculator */
.pricing-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.pricing-search-container {
    max-width: 500px;
    margin: 0 auto 3rem;
    display: flex;
    gap: 0.5rem;
}

.search-input-wrapper {
    position: relative;
    flex-grow: 1;
}

.pricing-search-input {
    width: 100%;
    padding: 0.9rem 1.2rem 0.9rem 2.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-normal);
}

.pricing-search-input:focus {
    border-color: var(--color-accent-blue);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.search-icon-svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.2rem;
    height: 1.2rem;
    fill: var(--color-secondary);
    pointer-events: none;
}

.filter-pills {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.filter-pill {
    padding: 0.4rem 1.2rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.85rem;
    color: var(--color-secondary);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition-fast);
}

.filter-pill:hover, .filter-pill.active {
    background: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
    color: #ffffff;
}

.pricing-cards-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.8rem 2.5rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(59, 130, 246, 0.35);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
    transform: translateY(-3px);
}

.pricing-card.featured {
    border-color: rgba(59, 130, 246, 0.35);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(6, 182, 212, 0.02) 100%);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.05);
}

.pricing-card.featured:hover {
    border-color: rgba(6, 182, 212, 0.45);
    box-shadow: 0 10px 35px rgba(6, 182, 212, 0.12);
}

/* Featured Ribbons or Badges */
.pricing-card.featured::after {
    content: "推荐";
    position: absolute;
    top: 0.6rem;
    right: -1.8rem;
    background: var(--color-accent-blue);
    color: white;
    padding: 0.15rem 2rem;
    transform: rotate(45deg);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
}

/* Horizontal elements spacing */
.plan-horizontal-header {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    min-width: 180px;
}

.pricing-plan-name {
    font-size: 1.35rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.plan-cycle-tag {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-accent-blue);
    font-size: 0.75rem;
    padding: 0.15rem 0.6rem;
    border-radius: 20px;
    font-weight: 600;
}

.plan-horizontal-subtitle {
    font-size: 0.85rem;
    color: var(--color-secondary);
}

/* Traffic Segment */
.plan-horizontal-traffic {
    text-align: center;
    min-width: 130px;
}

.plan-traffic-val {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-primary);
    background: linear-gradient(90deg, #ffffff 0%, #93c5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.plan-traffic-label {
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-top: 0.15rem;
}

/* Features Segment */
.pricing-features-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    max-width: 380px;
    margin: 0;
    list-style: none;
}

.pricing-features-list li {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.pricing-features-list li svg {
    width: 0.9rem;
    height: 0.9rem;
    fill: none;
    stroke: var(--color-accent-blue);
    stroke-width: 2.5;
    flex-shrink: 0;
}

/* Pricing Segment */
.plan-horizontal-pricing {
    text-align: right;
    min-width: 130px;
}

.pricing-price {
    font-size: 1.8rem;
    font-weight: 800;
    color: #ffffff;
    display: flex;
    align-items: baseline;
    justify-content: flex-end;
}

.pricing-price span {
    font-size: 0.85rem;
    color: var(--color-secondary);
    font-weight: normal;
    margin-left: 0.15rem;
}

/* Purchase button alignment */
.pricing-card .btn {
    min-width: 110px;
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    text-align: center;
}

.no-results-msg {
    text-align: center;
    padding: 3rem;
    color: var(--color-secondary);
    font-size: 1.1rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .pricing-card {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
        padding: 2.2rem 2rem;
    }
    
    .plan-horizontal-header {
        align-items: center;
        min-width: unset;
    }
    
    .plan-horizontal-traffic {
        min-width: unset;
    }
    
    .pricing-features-list {
        justify-content: center;
        max-width: unset;
    }
    
    .plan-horizontal-pricing {
        text-align: center;
        min-width: unset;
    }
    
    .pricing-price {
        justify-content: center;
    }
}

/* Articles Hub & Grid */
/* Articles Hub & Grid */
.articles-slider-container {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: 1rem 0 3.2rem;
}

.articles-grid {
    display: flex;
    flex-wrap: nowrap;
    gap: 1.5rem;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    width: 100%;
}

.article-card {
    flex: 0 0 calc(33.333% - 1rem);
    min-width: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    perspective: 1000px;
    animation: autoRotateCard 7s ease-in-out infinite alternate;
}

/* Staggered animation delays for article cards 3D rocking */
.article-card:nth-child(1) { animation-delay: -0.5s; }
.article-card:nth-child(2) { animation-delay: -2s; }
.article-card:nth-child(3) { animation-delay: -3.5s; }
.article-card:nth-child(4) { animation-delay: -5s; }
.article-card:nth-child(5) { animation-delay: -6.5s; }
.article-card:nth-child(6) { animation-delay: -8s; }

.article-card:hover {
    animation-play-state: paused;
    transform: perspective(1000px) rotateX(8deg) rotateY(-6deg) translateY(-8px);
    box-shadow: 0 20px 45px rgba(59, 130, 246, 0.2), 0 0 30px rgba(6, 182, 212, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.article-card:hover .article-image-box img {
    transform: scale(1.08) translateZ(40px);
    filter: brightness(1.05) contrast(1.1);
}

.article-card .article-info {
    transform: translateZ(20px);
    transition: transform 0.5s ease;
}

.article-card:hover .article-info {
    transform: translateZ(35px);
}

/* Responsive columns */
@media (max-width: 1024px) {
    .article-card {
        flex: 0 0 calc(50% - 0.75rem);
    }
}
@media (max-width: 640px) {
    .article-card {
        flex: 0 0 100%;
    }
}

.article-image-box {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--gradient-primary);
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--border-card);
}

.article-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
    filter: brightness(0.85) contrast(1.05);
    transform: scale(1.01);
}

.article-info {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.article-meta {
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-bottom: 0.75rem;
    display: flex;
    gap: 1rem;
}

.article-info h3 {
    font-size: 1.25rem;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: #ffffff;
    transition: var(--transition-fast);
}

.article-card:hover .article-info h3 {
    color: var(--color-accent-blue);
}

.article-excerpt {
    color: var(--color-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more-link {
    color: var(--color-accent-blue);
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.read-more-link svg {
    width: 0.95rem;
    height: 0.95rem;
    fill: currentColor;
    transition: var(--transition-fast);
}

.read-more-link:hover svg {
    transform: translateX(3px);
}

/* User Reviews Section */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    padding: 2.5rem;
}

.testimonial-rating {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1.25rem;
}

.testimonial-rating svg {
    width: 1.2rem;
    height: 1.2rem;
    fill: #f59e0b; /* Amber */
}

.testimonial-comment {
    color: #e2e8f0;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar-placeholder {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    color: #ffffff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-meta-info h4 {
    font-size: 1rem;
    font-weight: 600;
}

.user-meta-info p {
    color: var(--color-secondary);
    font-size: 0.8rem;
}

/* FAQ Accordion Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-card);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.faq-question-btn {
    width: 100%;
    padding: 1.5rem;
    background: var(--bg-card);
    border: none;
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question-btn svg {
    width: 1.2rem;
    height: 1.2rem;
    fill: currentColor;
    transition: var(--transition-normal);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    background: rgba(255, 255, 255, 0.01);
}

.faq-answer-content {
    padding: 0 1.5rem 1.5rem;
    color: var(--color-secondary);
    font-size: 0.95rem;
}

/* Active FAQ State */
.faq-item.active {
    border-color: var(--color-accent-blue);
    box-shadow: 0 5px 20px rgba(59, 130, 246, 0.05);
}

.faq-item.active .faq-question-btn {
    background: rgba(59, 130, 246, 0.05);
}

.faq-item.active .faq-question-btn svg {
    transform: rotate(180deg);
    color: var(--color-accent-blue);
}

.faq-item.active .faq-answer {
    max-height: 500px; /* High enough to contain content */
    transition: max-height 0.4s cubic-bezier(1, 0, 1, 0);
}

/* Footer Section */
footer {
    background-color: #05060a;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 5rem 0 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand-info p {
    color: var(--color-secondary);
    margin-top: 1rem;
    font-size: 0.95rem;
    max-width: 320px;
}

.footer-links-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-links-col ul {
    list-style: none;
}

.footer-links-col ul li {
    margin-bottom: 0.75rem;
}

.footer-links-col ul li a {
    color: var(--color-secondary);
    font-size: 0.9rem;
}

.footer-links-col ul li a:hover {
    color: #ffffff;
    padding-left: 4px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-copyright {
    color: var(--color-secondary);
    font-size: 0.85rem;
}

.footer-seo-links {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--color-secondary);
}

/* ==========================================================================
   Article Detail Page Templates Setup (Shared classes for sub-pages)
   ========================================================================== */
.article-detail-layout {
    padding-top: 8rem;
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: 6rem;
}

.article-header {
    margin-bottom: 2.5rem;
}

.article-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.25;
}

.article-detail-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--color-secondary);
    font-size: 0.9rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-card);
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #e2e8f0;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content h2 {
    font-size: 1.8rem;
    margin: 3rem 0 1.25rem;
    color: #ffffff;
    border-left: 4px solid var(--color-accent-blue);
    padding-left: 0.75rem;
}

.article-content h3 {
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
    color: #ffffff;
}

.article-content ul, .article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content a {
    color: var(--color-accent-blue);
    border-bottom: 1px dashed var(--color-accent-blue);
    font-weight: 500;
}

.article-content a:hover {
    color: #ffffff;
    border-bottom-style: solid;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.95rem;
}

.article-content th, .article-content td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-card);
}

.article-content th {
    background: rgba(255, 255, 255, 0.02);
    color: #ffffff;
    font-weight: 600;
}

.article-content blockquote {
    background: rgba(59, 130, 246, 0.05);
    border-left: 4px solid var(--color-accent-blue);
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #cbd5e1;
}

.article-content img {
    border-radius: 12px;
    margin: 2rem 0;
    border: 1px solid var(--border-card);
}

.article-cta-box {
    margin: 3rem 0;
    padding: 3rem 2rem;
    text-align: center;
}

.article-cta-box h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.article-cta-box p {
    color: var(--color-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.article-navigation-links {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-card);
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
}

.article-nav-prev, .article-nav-next {
    max-width: 48%;
}

.article-nav-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
}

.article-nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #ffffff;
}

.article-nav-title:hover {
    color: var(--color-accent-blue);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .hero-section {
        background-position: center;
    }
    .hero-section::before {
        background: linear-gradient(180deg, 
            rgba(10, 11, 16, 0.95) 0%, 
            rgba(10, 11, 16, 0.85) 60%, 
            rgba(10, 11, 16, 0.95) 100%);
    }
    .hero-title {
        font-size: 3rem;
    }
    .hero-container {
        display: block;
        text-align: center;
    }
    .hero-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* In production a mobile menu toggles this */
    }
    .mobile-menu-btn {
        display: block;
    }
    .section-title {
        font-size: 2rem;
    }
    .hero-title {
        font-size: 2.25rem;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .article-navigation-links {
        flex-direction: column;
        gap: 2rem;
    }
    .article-nav-prev, .article-nav-next {
        max-width: 100%;
    }
    .article-header h1 {
        font-size: 2rem;
    }
}