/* ==========================================================================
   红杏云机场 - 科技感大气极简落地页 Design System (2026)
   ========================================================================== */

/* 1. CSS Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Theme Colors */
    --primary: #FF3B3F;
    --primary-hover: #E02B30;
    --primary-light: rgba(255, 59, 63, 0.06);
    --primary-glow: rgba(255, 59, 63, 0.25);
    --accent-cyan: #00D2FF;
    --accent-green: #10B981;
    
    /* Backgrounds - Keeping Base White #FFFFFF */
    --bg-main: #FFFFFF;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: #FFFFFF;
    --bg-alt: #FAFAFC;

    /* Text Colors */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;

    /* Cyber Borders & Shadows */
    --border-light: rgba(226, 232, 240, 0.8);
    --border-tech: rgba(255, 59, 63, 0.15);
    --border-glow: rgba(255, 59, 63, 0.4);
    
    --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.03), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
    --shadow-tech: 0 10px 30px -5px rgba(255, 59, 63, 0.08), 0 0 0 1px rgba(255, 59, 63, 0.12);
    --shadow-hover: 0 20px 40px -10px rgba(255, 59, 63, 0.16), 0 0 0 1px rgba(255, 59, 63, 0.25);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF3B3F 0%, #FF6B6E 100%);
    --gradient-text: linear-gradient(135deg, #0F172A 30%, #FF3B3F 100%);
    --gradient-glow: radial-gradient(circle, rgba(255, 59, 63, 0.12) 0%, transparent 70%);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-pill: 9999px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', PingFang SC, Hiragino Sans GB, Microsoft YaHei, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-main);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 2. Dynamic Tech Background Overlay (White Base Maintained) */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: #FFFFFF;
    overflow: hidden;
}

.circle-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

.circle-container::before {
    content: '';
    position: absolute;
    width: 700px;
    height: 700px;
    top: -200px;
    right: -100px;
    background: radial-gradient(circle, rgba(255, 59, 63, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    animation: pulseGlow 18s infinite alternate ease-in-out;
}

.circle-container::after {
    content: '';
    position: absolute;
    width: 900px;
    height: 900px;
    bottom: -300px;
    left: -200px;
    background: radial-gradient(circle, rgba(0, 210, 255, 0.04) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    animation: pulseGlow 22s infinite alternate-reverse ease-in-out;
}

/* Cyber Grid Overlay */
.tech-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to right, rgba(255, 59, 63, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 59, 63, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
}

@keyframes pulseGlow {
    0% { transform: scale(1) translate(0, 0); opacity: 0.6; }
    50% { transform: scale(1.15) translate(-30px, 40px); opacity: 0.9; }
    100% { transform: scale(0.95) translate(40px, -20px); opacity: 0.6; }
}

/* 3. Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-tech);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    cursor: pointer;
}

.brand-logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    color: #FFF;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(255, 59, 63, 0.3);
}

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

.brand-tag {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    background: rgba(255, 59, 63, 0.1);
    color: var(--primary);
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 59, 63, 0.2);
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.25s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.25s ease;
}

.nav-menu a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Nav CTA Button */
.btn-register {
    padding: 10px 24px !important;
    background: var(--gradient-primary);
    color: #FFFFFF !important;
    font-weight: 600 !important;
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 14px rgba(255, 59, 63, 0.3);
    transition: all 0.3s ease !important;
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 59, 63, 0.45);
}

.btn-register::after {
    display: none !important;
}

/* Mobile Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

/* 4. Section Common Styling */
.section {
    padding: 110px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary);
    background: rgba(255, 59, 63, 0.08);
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 59, 63, 0.18);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* 5. Hero Section */
.hero {
    padding: 170px 0 100px 0;
    text-align: center;
    position: relative;
}

.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 59, 63, 0.05);
    border: 1px solid rgba(255, 59, 63, 0.2);
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
    box-shadow: 0 2px 10px rgba(255, 59, 63, 0.08);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(255, 59, 63, 0.7);
    animation: pulseRing 2s infinite;
}

@keyframes pulseRing {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 63, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(255, 59, 63, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 63, 0); }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

.hero-subtitle {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 70px;
}

/* Primary Button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--gradient-primary);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-pill);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(255, 59, 63, 0.35);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 16px 40px rgba(255, 59, 63, 0.45);
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    background: #FFFFFF;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-subtle);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--border-tech);
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-tech);
}

/* Hero Stats Dashboard Bar */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
    padding: 24px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-tech);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-tech);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--border-tech);
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(255, 59, 63, 0.08);
    border-radius: var(--radius-sm);
}

.stat-info {
    text-align: left;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-value .unit {
    font-size: 1rem;
    color: var(--primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 6. Node Status Section */
.status-section {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.status-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-subtle);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.status-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.status-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-tech);
    box-shadow: var(--shadow-tech);
}

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

.status-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.status-title-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.status-icon {
    font-size: 1.8rem;
}

.status-title-group h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.node-type {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

.status-indicator.online {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-indicator.online .pulse-dot {
    background-color: var(--accent-green);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
}

.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.metric-label {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.metric-val {
    font-size: 0.95rem;
    font-weight: 700;
}

.metric-val.latency-low {
    color: var(--accent-green);
}

.metric-val.latency-mid {
    color: #F59E0B;
}

.meter-bar {
    width: 100%;
    height: 6px;
    background: #E2E8F0;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 16px;
}

.meter-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s ease;
}

.meter-fill.low {
    background: var(--accent-green);
}

.meter-fill.mid {
    background: #F59E0B;
}

.footer-metric {
    margin-bottom: 0;
    padding-top: 12px;
    border-top: 1px dashed var(--border-light);
}

.load-badge {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.load-badge.low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.load-badge.mid {
    background: rgba(245, 158, 11, 0.1);
    color: #D97706;
}

/* 7. Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: stretch;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-subtle);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-tech);
    border-color: var(--border-tech);
}

/* Featured Recommended Card */
.pricing-card.featured {
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-hover);
    transform: scale(1.03);
    background: #FFFFFF;
}

.pricing-card.featured:hover {
    transform: scale(1.03) translateY(-6px);
}

.badge-featured {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: #FFFFFF;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 12px rgba(255, 59, 63, 0.35);
    display: flex;
    align-items: center;
    gap: 4px;
}

.plan-tag {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

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

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.price {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 10px;
}

.price .currency {
    font-size: 1.5rem;
    vertical-align: top;
    margin-right: 2px;
    color: var(--primary);
}

.price .period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.pricing-slogan {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 36px;
}

.pricing-features li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.check-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: rgba(255, 59, 63, 0.1);
    color: var(--primary);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 800;
}

.btn-pricing {
    width: 100%;
    padding: 14px;
    background: #FFFFFF;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-pricing:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.btn-pricing.primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    border: none;
    box-shadow: 0 6px 20px rgba(255, 59, 63, 0.35);
}

.btn-pricing.primary:hover {
    box-shadow: 0 10px 28px rgba(255, 59, 63, 0.48);
    transform: translateY(-2px);
}

/* 8. Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    box-shadow: var(--shadow-subtle);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-tech);
    box-shadow: var(--shadow-tech);
}

.feature-icon-box {
    width: 56px;
    height: 56px;
    background: rgba(255, 59, 63, 0.08);
    border: 1px solid rgba(255, 59, 63, 0.15);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

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

/* 9. Reviews Section */
.reviews-section {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-subtle);
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-tech);
    box-shadow: var(--shadow-tech);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    color: #FFFFFF;
    font-weight: 800;
    font-size: 1.1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(255, 59, 63, 0.25);
}

.reviewer-info h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.verified-badge {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 4px;
}

.stars {
    color: #F59E0B;
    font-size: 0.9rem;
    margin-top: 2px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    font-style: italic;
}

/* 10. FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 22px 28px;
    box-shadow: var(--shadow-subtle);
    transition: all 0.3s ease;
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.faq-toggle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 59, 63, 0.08);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: transform 0.3s ease;
}

.faq-toggle::before, .faq-toggle::after {
    content: '';
    position: absolute;
    background-color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-toggle::before {
    width: 10px;
    height: 2px;
}

.faq-toggle::after {
    width: 2px;
    height: 10px;
}

.faq-item.active .faq-toggle::after {
    transform: rotate(90deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin-top 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    margin-top: 14px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    border-top: 1px dashed var(--border-light);
    padding-top: 14px;
}

/* 11. Knowledge Base Section */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.knowledge-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-subtle);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.knowledge-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-tech);
    box-shadow: var(--shadow-tech);
}

.knowledge-icon-box {
    width: 48px;
    height: 48px;
    background: rgba(255, 59, 63, 0.08);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.knowledge-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.knowledge-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 20px;
    flex-grow: 1;
}

.read-more {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.read-more .arrow {
    transition: transform 0.3s ease;
}

.knowledge-card:hover .read-more .arrow {
    transform: translateX(4px);
}

/* 12. Footer */
.footer {
    background: #0B0F19;
    color: #94A3B8;
    padding: 80px 0 40px 0;
    border-top: 1px solid rgba(255, 59, 63, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 14px;
}

.brand-col p {
    font-size: 0.95rem;
    max-width: 320px;
}

.footer-section h4 {
    color: #FFFFFF;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section ul li a {
    color: #94A3B8;
    text-decoration: none;
    transition: color 0.25s ease;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    font-size: 0.9rem;
}

/* 13. Responsive Adaptations */
@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    .pricing-card.featured:hover {
        transform: translateY(-6px);
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: left 0.3s ease;
    }

    .nav-menu.active {
        left: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}