/* ==========================================================================
   JIUYUN AIRPORT (九云机场官网) - SWISS INTERNATIONAL / EDITORIAL MONO STYLE
   Colors:
     Background: #FFFFFF (Pure Paper White)
     Containers: #F4F4F5 (Light Cool Gray)
     Accent:     #000000 (Pure Black Fill)
     Borders:    #E4E4E7 (1px Sharp Crisp Line)
     Body Text:  #18181B (High Contrast)
     Subtitles:  #52525B (Refined Gray)
   ========================================================================== */

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F4F4F5;
  --bg-tertiary: #FAFAFA;
  --border-color: #E4E4E7;
  --border-dark: #18181B;
  --text-primary: #18181B;
  --text-secondary: #52525B;
  --text-muted: #71717A;
  --accent-black: #000000;
  --accent-white: #FFFFFF;
  --status-green: #10B981;
  --status-green-bg: #ECFDF5;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Geist Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1240px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
}

/* Swiss Mono Typography Utility */
.mono {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1, "zero" 1;
}

.uppercase {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* 1. TOP ANNOUNCEMENT BANNER */
.top-announcement {
  background-color: var(--accent-black);
  color: var(--accent-white);
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-dark);
  position: relative;
  z-index: 100;
}

.top-announcement-content {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  justify-content: center;
}

.top-tag {
  background: #27272A;
  color: #FAFAFA;
  padding: 2px 8px;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  font-weight: 600;
  border: 1px solid #3F3F46;
}

.announcement-text {
  color: #E4E4E7;
}

.announcement-text strong {
  color: #FFFFFF;
  font-weight: 600;
}

.announcement-link {
  color: #FFFFFF;
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-left: 8px;
  font-weight: 500;
  transition: opacity 0.2s;
}

.announcement-link:hover {
  opacity: 0.8;
}

/* NAVIGATION BAR */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 99;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-symbol {
  width: 32px;
  height: 32px;
  background-color: var(--accent-black);
  color: var(--accent-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid var(--accent-black);
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--accent-black);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-black);
  transition: width 0.2s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  letter-spacing: -0.01em;
}

.btn-black {
  background-color: var(--accent-black);
  color: var(--accent-white);
  border-color: var(--accent-black);
}

.btn-black:hover {
  background-color: #27272A;
  border-color: #27272A;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-dark);
}

.btn-outline:hover {
  background-color: var(--bg-secondary);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 0.95rem;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px;
  cursor: pointer;
  color: var(--text-primary);
}

/* SECTION STRUCTURE */
.section {
  padding: 96px 24px;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 56px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: flex-start;
}

.section-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-left: 2px solid var(--accent-black);
  padding-left: 12px;
  line-height: 1.4;
}

.section-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* HERO SECTION WITH DYNAMIC BACKGROUND */
.hero-section {
  position: relative;
  min-height: 82vh;
  display: flex;
  align-items: center;
  padding: 80px 24px 100px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: auto;
  opacity: 0.65;
}

.hero-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  width: fit-content;
  color: var(--text-primary);
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: var(--status-green);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 2px var(--status-green-bg);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.75rem, 5.5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.08;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.hero-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.hero-feature-icon {
  color: var(--accent-black);
  font-weight: bold;
}

/* HERO TELEMETRY BOX (SWISS EDITORIAL PANEL) */
.hero-telemetry-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-dark);
  box-shadow: 8px 8px 0px rgba(0, 0, 0, 0.06);
  position: relative;
}

.telemetry-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.telemetry-window-controls {
  display: flex;
  gap: 6px;
}

.telemetry-dot {
  width: 8px;
  height: 8px;
  border: 1px solid #71717A;
  background: transparent;
}

.telemetry-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.telemetry-stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

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

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-black);
  letter-spacing: -0.02em;
}

.stat-sub {
  font-size: 0.72rem;
  color: var(--status-green);
  font-family: var(--font-mono);
}

.live-ping-feed {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.live-feed-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.feed-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.feed-node {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-code {
  font-weight: 700;
  color: var(--accent-black);
}

.node-name {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.feed-stats {
  display: flex;
  align-items: center;
  gap: 16px;
}

.feed-ping {
  color: var(--status-green);
  font-weight: 600;
}

.feed-status {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: #E4E4E7;
  color: var(--text-primary);
}

/* SECTION 2: NODE LATENCY & REAL-TIME STATUS */
.node-status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.node-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 20px;
  transition: var(--transition);
  position: relative;
}

.node-card:hover {
  border-color: var(--accent-black);
  transform: translateY(-2px);
}

.node-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.node-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.node-card-flag {
  font-size: 1.25rem;
}

.node-card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.spec-cell {
  display: flex;
  flex-direction: column;
}

.spec-title {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
}

.spec-val {
  font-weight: 600;
  color: var(--text-primary);
}

.ping-gauge {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.ping-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--status-green);
  font-weight: 700;
}

.ping-bar-wrap {
  width: 90px;
  height: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: var(--accent-black);
  width: 90%;
}

.realtime-control-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 16px;
}

/* SECTION 3: PRICING PLANS */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--accent-black);
}

.pricing-card.featured {
  border: 2px solid var(--accent-black);
  background: #FCFCFC;
  transform: translateY(-4px);
  box-shadow: 6px 6px 0px rgba(0,0,0,0.08);
}

.pricing-tag {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-black);
  color: var(--accent-white);
  padding: 3px 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.pricing-tier-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 16px;
}

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

.amount {
  font-size: 3.25rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent-black);
  font-family: var(--font-mono);
  line-height: 1;
}

.period {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.pricing-summary {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  min-height: 48px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.feature-check {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-black);
  font-weight: 700;
}

.pricing-action {
  width: 100%;
}

.pricing-footer-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* SECTION 4: CORE ADVANTAGES */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--border-color);
  border: 1px solid var(--border-color);
}

.advantage-card {
  background: var(--bg-primary);
  padding: 40px 32px;
  transition: var(--transition);
}

.advantage-card:hover {
  background: var(--bg-secondary);
}

.advantage-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
}

.advantage-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.advantage-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* SECTION 5: KNOWLEDGE BASE & TUTORIALS */
.articles-filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--accent-black);
  color: var(--accent-white);
  border-color: var(--accent-black);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 28px;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--accent-black);
  transform: translateY(-2px);
}

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

.article-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  text-transform: uppercase;
}

.article-read-time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-card-summary {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-black);
  font-weight: 600;
}

.article-arrow {
  transition: transform 0.2s ease;
}

.article-card:hover .article-arrow {
  transform: translateX(4px);
}

/* SECTION 6: FAQ ACCORDION */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.faq-item {
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--accent-black);
}

.faq-question {
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  user-select: none;
}

.faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  transition: transform 0.2s;
  color: var(--accent-black);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* SECTION 7: USER REVIEWS */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-rating {
  font-family: var(--font-mono);
  color: var(--accent-black);
  letter-spacing: 2px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.review-quote {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-primary);
  margin-bottom: 24px;
  font-style: normal;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.author-avatar {
  width: 36px;
  height: 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.author-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.verified-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: #F4F4F5;
  border: 1px solid #E4E4E7;
  padding: 1px 4px;
  margin-left: 6px;
  color: #52525B;
}

/* BOTTOM FINAL CTA BANNER */
.cta-banner-section {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 80px 24px;
}

.cta-box {
  background: var(--accent-black);
  color: var(--accent-white);
  padding: 64px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--accent-black);
  gap: 32px;
}

.cta-box-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta-box-text p {
  color: #A1A1AA;
  font-size: 1rem;
  max-width: 580px;
}

.cta-box .btn {
  background: var(--accent-white);
  color: var(--accent-black);
  border-color: var(--accent-white);
  font-weight: 700;
  white-space: nowrap;
}

.cta-box .btn:hover {
  background: #E4E4E7;
}

/* FOOTER */
.site-footer {
  background: var(--bg-primary);
  padding: 64px 24px 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 340px;
  line-height: 1.6;
}

.footer-column-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-black);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 540px;
    margin: 0 auto;
  }
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .section-header {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .cta-box {
    flex-direction: column;
    text-align: center;
    padding: 40px 24px;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: auto;
  }
  .nav-container {
    height: 60px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
  }
  .nav-links.mobile-open {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-section {
    padding: 48px 16px 64px;
  }
  .section {
    padding: 64px 16px;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .top-announcement {
    display: none;
  }
}