/* ===================================================================
   快冲云机场官方落地页 - 样式表
   Domain: kuaichongyunjc.click
   Theme: Connected nodes in dark space (Cyan / Neon Blue / Deep Space)
   =================================================================== */

:root {
    --bg-dark: #070b14;
    --bg-card: #121a2d;
    --bg-card-hover: #17223b;
    --bg-elevated: #1a2542;
    --border-color: rgba(0, 240, 255, 0.15);
    --border-color-hover: rgba(0, 240, 255, 0.45);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-cyan: #00f0ff;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-gold: #f59e0b;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --gradient-btn: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
    --gradient-card: linear-gradient(180deg, rgba(18, 26, 45, 0.85) 0%, rgba(11, 19, 36, 0.95) 100%);
    --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.25);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: auto;
}

.content-wrapper {
    position: relative;
    z-index: 1;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ================= Header & Nav ================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.35rem;
    color: #fff;
    letter-spacing: 0.5px;
}

.brand-logo .logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #00f0ff, #3b82f6);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #070b14;
    font-size: 1.2rem;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.brand-logo span.highlight {
    color: var(--accent-cyan);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 6px 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width 0.25s ease;
}

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

.header-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--gradient-btn);
    color: #fff;
    box-shadow: 0 4px 18px rgba(0, 210, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 210, 255, 0.55);
}

.btn-outline {
    background: rgba(0, 240, 255, 0.08);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 240, 255, 0.35);
}

.btn-outline:hover {
    background: rgba(0, 240, 255, 0.18);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.6rem;
    cursor: pointer;
}

/* ================= Hero Section ================= */
.hero-section {
    padding: 90px 0 60px;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 30px;
    font-size: 0.88rem;
    color: var(--accent-cyan);
    margin-bottom: 24px;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan);
    animation: pulse 1.6s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero-title .glow-text {
    background: linear-gradient(135deg, #00f0ff 20%, #60a5fa 60%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 35px rgba(0, 240, 255, 0.3);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 820px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-actions .btn {
    padding: 14px 34px;
    font-size: 1.05rem;
}

.speed-metric-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    padding: 24px 30px;
    background: rgba(18, 26, 45, 0.65);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-width: 900px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.metric-val {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.metric-lbl {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ================= Features Grid ================= */
.section {
    padding: 70px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

.feature-icon {
    width: 52px;
    height: 52px;
    background: rgba(0, 240, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 1.6rem;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 240, 255, 0.2);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ================= Official Entry Section ================= */
.entry-card {
    background: linear-gradient(135deg, rgba(26, 37, 66, 0.9) 0%, rgba(13, 20, 38, 0.95) 100%);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    margin-bottom: 30px;
}

.entry-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: center;
}

.entry-info h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: #fff;
}

.entry-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 20px;
}

.entry-mirrors {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.mirror-badge {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    font-size: 0.85rem;
    color: #cbd5e1;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mirror-badge .status-ping {
    width: 6px;
    height: 6px;
    background: var(--accent-green);
    border-radius: 50%;
}

.entry-btn-box {
    text-align: center;
}

.entry-btn-box .btn {
    width: 100%;
    padding: 16px 20px;
    font-size: 1.1rem;
}

/* ================= Pricing Cards (Figure 2 Style) ================= */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 26px;
    align-items: stretch;
}

.pricing-card {
    background: #182035;
    border: 1px solid #273352;
    border-radius: var(--radius-md);
    padding: 28px 26px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-6px);
    border-color: #3b82f6;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.6);
}

.pricing-card.featured {
    border: 2px solid #5865f2;
    background: linear-gradient(180deg, #1b233d 0%, #161c31 100%);
    box-shadow: 0 0 30px rgba(88, 101, 242, 0.3);
}

.card-top-tags {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.tag-period {
    background: rgba(88, 101, 242, 0.18);
    color: #818cf8;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
}

.tag-recommend {
    background: #f59e0b;
    color: #000;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.plan-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: #f8fafc;
    margin-bottom: 16px;
}

.plan-price-wrap {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 22px;
}

.plan-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: #60a5fa;
    display: flex;
    align-items: baseline;
}

.plan-price .currency {
    font-size: 1.4rem;
    margin-right: 2px;
}

.plan-old-price {
    font-size: 1.15rem;
    color: #64748b;
    text-decoration: line-through;
}

/* Key specs row */
.plan-specs-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    background: #111728;
    border: 1px solid #1e2942;
    border-radius: var(--radius-sm);
    padding: 14px;
    margin-bottom: 20px;
}

.spec-sub {
    font-size: 0.82rem;
    color: #94a3b8;
}

.spec-val {
    font-size: 0.98rem;
    font-weight: 600;
    color: #f1f5f9;
}

/* Feature list */
.plan-features {
    margin-bottom: 24px;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.88rem;
    color: #cbd5e1;
    margin-bottom: 9px;
    line-height: 1.5;
}

.plan-features li .ico {
    font-size: 0.95rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.plan-features li.highlight-feat {
    color: #a5b4fc;
    font-weight: 500;
}

/* Notice box */
.plan-notice {
    background: rgba(15, 23, 42, 0.6);
    border-top: 1px dashed #24304d;
    padding-top: 12px;
    margin-bottom: 20px;
    font-size: 0.8rem;
    color: #94a3b8;
}

.plan-notice .notice-title {
    font-weight: 600;
    color: #cbd5e1;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.plan-notice ul {
    padding-left: 14px;
    list-style: disc;
}

.plan-notice li {
    margin-bottom: 2px;
}

.btn-buy {
    width: 100%;
    background: #5b68e4;
    color: #fff;
    padding: 13px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-buy:hover {
    background: #4f5cd6;
    box-shadow: 0 4px 18px rgba(91, 104, 228, 0.45);
}

/* ================= Clients Section ================= */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.client-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.client-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
}

.client-logo {
    font-size: 2.4rem;
    color: var(--accent-cyan);
    margin-bottom: 12px;
}

.client-name {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.client-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ================= AI & Knowledge Base ================= */
.ai-grid, .kb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.ai-card, .kb-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.ai-card:hover, .kb-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
}

.ai-badge {
    display: inline-block;
    padding: 3px 8px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 10px;
}

/* ================= FAQ Accordion ================= */
.faq-search-box {
    max-width: 580px;
    margin: 0 auto 30px;
    position: relative;
}

.faq-search-input {
    width: 100%;
    padding: 14px 20px 14px 45px;
    background: rgba(18, 26, 45, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.faq-search-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
}

.faq-search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.faq-cat-btn {
    padding: 8px 18px;
    background: rgba(18, 26, 45, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 0.88rem;
    cursor: pointer;
    transition: var(--transition);
}

.faq-cat-btn.active, .faq-cat-btn:hover {
    background: var(--accent-cyan);
    color: #070b14;
    font-weight: 600;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 960px;
    margin: 0 auto;
}

.faq-item {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active {
    border-color: rgba(0, 240, 255, 0.45);
}

.faq-question {
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 1.02rem;
    font-weight: 600;
    color: #e2e8f0;
}

.faq-question:hover {
    color: var(--accent-cyan);
}

.faq-arrow {
    font-size: 1.1rem;
    transition: transform 0.25s ease;
    color: var(--accent-cyan);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
    background: rgba(10, 16, 28, 0.5);
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    padding: 0 24px 20px 24px;
    max-height: 400px;
}

/* ================= Articles Grid ================= */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 26px;
}

.article-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-glow);
}

.article-body {
    padding: 24px;
}

.article-tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-cyan);
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 12px;
}

.article-title {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 12px;
    color: #f8fafc;
}

.article-title a:hover {
    color: var(--accent-cyan);
}

.article-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.article-footer {
    padding: 14px 24px;
    background: rgba(7, 11, 20, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.read-more-link {
    color: var(--accent-cyan);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.read-more-link:hover {
    text-decoration: underline;
}

/* ================= Article Single Page ================= */
.article-page {
    padding: 50px 0 80px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent-cyan);
}

.article-content-wrapper {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 44px;
    margin-bottom: 40px;
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 30px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-top: 12px;
    flex-wrap: wrap;
}

.article-body-content {
    color: #cbd5e1;
    font-size: 1.05rem;
    line-height: 1.85;
}

.article-body-content h2 {
    font-size: 1.65rem;
    color: #f8fafc;
    margin: 40px 0 18px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(0, 240, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 8px;
}

.article-body-content h3 {
    font-size: 1.3rem;
    color: #e2e8f0;
    margin: 26px 0 12px;
}

.article-body-content p {
    margin-bottom: 20px;
}

.article-body-content ul, .article-body-content ol {
    margin-bottom: 22px;
    padding-left: 24px;
}

.article-body-content ul {
    list-style: disc;
}

.article-body-content li {
    margin-bottom: 8px;
}

.article-body-content blockquote {
    border-left: 4px solid var(--accent-cyan);
    padding: 14px 20px;
    background: rgba(0, 240, 255, 0.05);
    margin: 24px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: #94a3b8;
}

.article-body-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: #0f172a;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.article-body-content th, .article-body-content td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #1e293b;
    font-size: 0.92rem;
}

.article-body-content th {
    background: #1e293b;
    color: var(--accent-cyan);
    font-weight: 600;
}

.article-body-content a {
    color: var(--accent-cyan);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.article-body-content a:hover {
    color: #38bdf8;
}

/* Call to action inside article */
.article-cta-box {
    background: linear-gradient(135deg, rgba(30, 41, 78, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
    border: 1px solid var(--accent-cyan);
    border-radius: var(--radius-md);
    padding: 28px;
    margin: 36px 0;
    text-align: center;
    box-shadow: var(--shadow-glow);
}

.article-cta-box h4 {
    font-size: 1.4rem;
    color: #fff;
    margin-bottom: 10px;
}

.article-cta-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 18px;
}

/* ================= Footer ================= */
.site-footer {
    background: #04070d;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1rem;
    color: #e2e8f0;
    margin-bottom: 18px;
    font-weight: 600;
}

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

.footer-col ul li a:hover {
    color: var(--accent-cyan);
}

.footer-keywords-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-keywords-cloud a {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.footer-keywords-cloud a:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

/* Floating Action Button */
.floating-cta {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99;
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
    animation: floatBounce 3s ease-in-out infinite;
}

@keyframes floatBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* ================= Responsive ================= */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    .mobile-toggle {
        display: block;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .entry-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 1.9rem;
    }
    .speed-metric-bar {
        gap: 20px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .article-content-wrapper {
        padding: 24px 18px;
    }
}