/* ==========================================================================
   Kuromi - Design System & Custom Styles
   ========================================================================== */

:root {
    --bg-primary: #f8f8fc;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #ffffff;
    --bg-muted: #f1f1f9;
    
    --text-primary: #1e1b4b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --brand-purple: #7c3aed;
    --brand-purple-hover: #6d28d9;
    --brand-purple-light: #ede9fe;
    --brand-purple-glow: rgba(124, 58, 237, 0.25);
    
    --accent-pink: #ec4899;
    --accent-gold: #fbbf24;
    --accent-gold-text: #f59e0b;
    
    --border-color: #e2e8f0;
    --border-purple: #c4b5fd;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(124, 58, 237, 0.08);
    --shadow-lg: 0 20px 50px rgba(124, 58, 237, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 9999px;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0a0718;
    --bg-surface: #130f26;
    --bg-surface-elevated: #1a1435;
    --bg-muted: #1e183d;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --brand-purple-light: rgba(124, 58, 237, 0.2);
    --border-color: #261f4d;
    --border-purple: #7c3aed;
    
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 50px rgba(124, 58, 237, 0.25);
}

/* Reset & Global */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Noto Sans SC', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.highlight-gold { color: var(--accent-gold); font-weight: 700; }
.highlight-gold-bold { color: var(--accent-gold); font-weight: 800; }
.highlight-purple { color: var(--brand-purple); font-weight: 700; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-solid-purple {
    background-color: var(--brand-purple);
    color: #ffffff;
    box-shadow: 0 4px 16px var(--brand-purple-glow);
}

.btn-solid-purple:hover {
    background-color: var(--brand-purple-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--brand-purple-glow);
}

.btn-outline-purple {
    background: transparent;
    border-color: var(--brand-purple);
    color: var(--brand-purple);
}

.btn-outline-purple:hover {
    background-color: var(--brand-purple-light);
    transform: translateY(-2px);
}

.btn-outline-nav {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 18px;
    font-size: 0.9rem;
}

.btn-outline-nav:hover {
    border-color: var(--brand-purple);
    color: var(--brand-purple);
    background-color: var(--brand-purple-light);
}

.btn-hero-cta {
    background: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
    color: #ffffff;
    padding: 14px 36px;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 8px 30px rgba(236, 72, 153, 0.4);
}

.btn-hero-cta:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 35px rgba(236, 72, 153, 0.6);
}

.btn-hero-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    backdrop-filter: blur(10px);
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-full {
    width: 100%;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background: rgba(19, 15, 38, 0.88);
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-en {
    font-family: 'Plus Jakarta Sans', Georgia, serif;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--brand-purple);
    line-height: 1;
}

.brand-cn {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-item {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-item:hover, .nav-item.active {
    color: var(--brand-purple);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switcher Switch */
.lang-switch {
    display: flex;
    align-items: center;
    background: var(--bg-muted);
    border-radius: var(--radius-pill);
    padding: 3px;
}

.lang-btn {
    border: none;
    background: transparent;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn.active {
    background: var(--brand-purple);
    color: #ffffff;
    box-shadow: 0 2px 8px var(--brand-purple-glow);
}

/* Theme Toggle */
.theme-toggle-btn {
    background: var(--bg-muted);
    border: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-btn:hover {
    transform: rotate(15deg) scale(1.05);
}

.sun-icon { width: 20px; height: 20px; display: none; }
.moon-icon { width: 20px; height: 20px; display: block; }

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

/* Hero Section */
.hero-section {
    position: relative;
    padding-top: 140px;
    padding-bottom: 0;
    background: linear-gradient(145deg, #0b061c 0%, #170d38 50%, #200f4f 100%);
    color: #ffffff;
    overflow: hidden;
}

#starfieldCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 80px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 40px;
}

.brand-tag {
    margin-bottom: 12px;
}

.kuromi-subtext {
    font-family: 'Plus Jakarta Sans', serif;
    font-style: italic;
    font-size: 1.2rem;
    color: #a78bfa;
    display: block;
    margin-bottom: 4px;
}

.kuromi-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #ffffff;
}

.hero-headline {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.hero-speed {
    font-size: 1.4rem;
    color: #cbd5e1;
    margin-bottom: 36px;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: fit-content;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.stat-label {
    font-size: 0.8rem;
    color: #94a3b8;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: rgba(255, 255, 255, 0.15);
}

/* Rocket Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.rocket-wrapper {
    position: relative;
    width: 100%;
    max-width: 440px;
    animation: floatAnimation 4s ease-in-out infinite;
}

.rocket-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(124, 58, 237, 0.4);
    position: relative;
    z-index: 2;
}

.rocket-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    height: 90%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.4) 0%, rgba(124, 58, 237, 0.2) 60%, transparent 80%);
    filter: blur(40px);
    z-index: 1;
}

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-16px) rotate(1deg); }
}

@media (prefers-reduced-motion: reduce) {
    .rocket-wrapper { animation: none; }
}

.hero-wave {
    position: relative;
    width: 100%;
    line-height: 0;
    margin-top: -40px;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 120px;
}

/* Section Global */
.section {
    padding: 90px 0;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--brand-purple);
    background: var(--brand-purple-light);
    border-radius: var(--radius-pill);
    margin-bottom: 12px;
}

.section-badge.center {
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

/* About Card */
.about-card {
    background: var(--bg-surface);
    border-radius: 28px;
    padding: 48px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.about-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--brand-purple);
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--brand-purple) 0%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-desc {
    font-size: 1.15rem;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.about-subdesc {
    font-size: 0.98rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.about-features-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-feat-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-muted);
    border-radius: var(--radius-md);
}

.feat-icon {
    font-size: 1.4rem;
}

.feat-text h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.feat-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.illustration-frame {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

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

/* Pricing Grid */
.billing-toggle-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.billing-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.billing-label.active {
    color: var(--brand-purple);
}

.discount-badge {
    background: #22c55e;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    margin-left: 4px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--brand-purple);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: center;
    margin-bottom: 70px;
}

.pricing-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    position: relative;
    transition: all var(--transition-normal);
}

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

.pricing-card.featured {
    border: 2px solid var(--brand-purple);
    box-shadow: var(--shadow-lg);
    padding: 44px 32px;
    transform: scale(1.04);
}

.pricing-card.featured:hover {
    transform: scale(1.04) translateY(-6px);
}

.featured-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--brand-purple);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: var(--radius-pill);
}

.plan-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 16px;
}

.plan-price {
    text-align: center;
    margin-bottom: 8px;
}

.plan-price .currency {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    vertical-align: top;
}

.plan-price .amount {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.plan-price .period {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.savings-tag {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: #16a34a;
    margin-bottom: 24px;
}

.plan-features {
    list-style: none;
    margin: 24px 0 32px;
}

.plan-features li {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.check-icon {
    font-weight: 700;
    color: #10b981;
}

.check-icon.purple {
    color: var(--brand-purple);
}

/* Comparison Table */
.comparison-container {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.comparison-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--text-primary);
}

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

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}

.comparison-table th, .comparison-table td {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.comparison-table th {
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-muted);
}

.comparison-table th:first-child, .comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    color: var(--text-secondary);
}

.comparison-table .highlight-column {
    background: var(--brand-purple-light);
    color: var(--brand-purple);
}

.badge-check {
    color: #16a34a;
    font-size: 1.2rem;
}

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

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    transition: all var(--transition-fast);
}

.feature-card:hover {
    border-color: var(--brand-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feat-card-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: transparent;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
}

.faq-icon {
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--brand-purple);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    transition: all var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: 20px;
}

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

/* Floating Chapter Navigation Arrows (Section III.6 requirement) */
.section-nav-arrows {
    position: fixed;
    right: 24px;
    bottom: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.arrow-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--brand-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.arrow-btn:hover:not(:disabled) {
    background: var(--brand-purple);
    color: #ffffff;
    transform: scale(1.08);
}

.arrow-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
}

/* Inner Page & Articles List Styling */
.inner-page {
    padding-top: 100px;
}

.page-main {
    padding: 40px 24px 80px;
}

.page-header {
    margin-bottom: 40px;
}

.page-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.content-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);

}

.content-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 28px 0 14px;
    color: var(--text-primary);
}

.content-card p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.content-card ul, .content-card ol {
    margin: 16px 0 24px 24px;
    color: var(--text-secondary);
}

.content-card li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.article-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition-fast);
}

.article-card:hover {
    border-color: var(--brand-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.article-tag {
    background: var(--brand-purple-light);
    color: var(--brand-purple);
    font-weight: 700;
    padding: 2px 10px;
    border-radius: var(--radius-pill);
}

.article-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.article-card-title a {
    text-decoration: none;
    color: var(--text-primary);
}

.article-card-title a:hover {
    color: var(--brand-purple);
}

.article-excerpt {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.read-more {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--brand-purple);
    text-decoration: none;
}

.cta-box {
    margin-top: 40px;
    padding: 36px;
    background: var(--brand-purple-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-purple);
}

.cta-box h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--brand-purple);
    margin-bottom: 8px;
}

.cta-box p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.sitemap-list {
    list-style: none;
    margin-left: 0 !important;
}

.sitemap-list li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-color);
}

.sitemap-list a {
    color: var(--brand-purple);
    text-decoration: none;
}

/* Footer */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 70px 0 30px;
}

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

.footer-desc {
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-links-group h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

.footer-links-group li {
    margin-bottom: 10px;
}

.footer-links-group a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}

.footer-links-group a:hover {
    color: var(--brand-purple);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 20px;
}

.footer-legal a:hover {
    color: var(--brand-purple);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-actions, .hero-stats { justify-content: center; margin-left: auto; margin-right: auto; }
    .about-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-card.featured { transform: none; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .hero-headline { font-size: 2.6rem; }
    .nav-links { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-features-list { grid-template-columns: 1fr; }
    .section-nav-arrows { right: 12px; bottom: 20px; }
    .arrow-btn { width: 38px; height: 38px; }
}