/* ==========================================================================
   MESL Cloud (MESL 机场 / MESL VPN) - 旗舰落地页样式表
   Design System: Dark Cyber Enterprise & Glassmorphism Aesthetics
   ========================================================================== */

:root {
  --bg-main: #07090e;
  --bg-card: rgba(16, 20, 31, 0.75);
  --bg-card-hover: rgba(22, 28, 44, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.35);
  
  --primary: #38bdf8;
  --primary-hover: #0ea5e9;
  --primary-glow: rgba(56, 189, 248, 0.25);
  --accent-violet: #818cf8;
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-gradient: linear-gradient(135deg, #ffffff 0%, #cbd5e1 50%, #94a3b8 100%);
  --brand-gradient: linear-gradient(135deg, #38bdf8 0%, #2563eb 50%, #7c3aed 100%);
  --card-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  --glow-button: 0 0 25px rgba(56, 189, 248, 0.35);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", system-ui, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --container-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;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 10% 30%, rgba(129, 140, 248, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 70%, rgba(6, 182, 212, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Background canvas */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

ul {
  list-style: none;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 9, 14, 0.75);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-smooth);
}

.header.scrolled {
  background: rgba(7, 9, 14, 0.92);
  border-bottom-color: rgba(56, 189, 248, 0.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-text {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.logo-text span {
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.logo-badge {
  font-size: 11px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

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

.nav-link {
  font-size: 14.5px;
  color: var(--text-muted);
  font-weight: 500;
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: #fff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 9999px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-smooth);
  text-decoration: none;
  white-space: nowrap;
}

.btn-ghost {
  color: var(--text-muted);
  background: transparent;
  border-color: var(--border-subtle);
}

.btn-ghost:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.45);
}

.btn-emerald {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-emerald:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.45);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 6px;
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: 9999px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 13.5px;
  color: var(--primary);
  margin-bottom: 28px;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.1);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(38px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}

.hero-title .brand-accent {
  background: linear-gradient(135deg, #38bdf8 20%, #818cf8 60%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 38px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

/* Hero Telemetry Strip */
.telemetry-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  backdrop-filter: blur(12px);
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 8px 12px;
  border-right: 1px solid var(--border-subtle);
}

.telemetry-item:last-child {
  border-right: none;
}

.telemetry-num {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.telemetry-num span {
  font-size: 16px;
  color: var(--primary);
}

.telemetry-label {
  font-size: 12.5px;
  color: var(--text-dim);
  font-weight: 500;
  margin-top: 4px;
}

/* ==========================================================================
   Live Status Panel
   ========================================================================== */
.live-status-section {
  padding: 30px 0 60px;
}

.status-box {
  background: rgba(13, 17, 26, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

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

.status-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #10b981;
  text-transform: uppercase;
}

.status-nodes-grid {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.node-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.node-chip .chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

.node-chip .ping-ms {
  color: var(--primary);
  font-weight: 600;
  font-family: monospace;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Services & Architecture (Style matching mesl.cloud)
   ========================================================================== */
.services-section {
  padding: 80px 0;
}

.service-card-group {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 44px 48px;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.service-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.service-card::after {
  content: '//';
  position: absolute;
  right: 48px;
  top: 40px;
  font-size: 32px;
  color: rgba(255, 255, 255, 0.12);
  font-family: monospace;
  font-weight: 700;
}

.service-tag {
  font-size: 13px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.service-heading {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.service-body {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 950px;
}

.service-body p {
  margin-bottom: 14px;
}

.service-body p:last-child {
  margin-bottom: 0;
}

.service-meta-tags {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.service-badge {
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Features Grid
   ========================================================================== */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 34px 28px;
  transition: all var(--transition-smooth);
  position: relative;
}

.feature-box:hover {
  border-color: rgba(56, 189, 248, 0.3);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 22px;
}

.feature-icon-wrap svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

.pricing-toggle-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 50px;
}

.toggle-container {
  display: inline-flex;
  background: rgba(18, 22, 34, 0.9);
  padding: 5px;
  border-radius: 9999px;
  border: 1px solid var(--border-subtle);
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.35);
}

.discount-tag {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 12px;
}

.pricing-cards-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-subtle);
  border-radius: 24px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 1.5px solid rgba(56, 189, 248, 0.5);
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.2);
}

.pricing-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-gradient);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 22px 0 12px;
}

.price-currency {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
}

.price-amount {
  font-size: 46px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.price-period {
  font-size: 14px;
  color: var(--text-dim);
}

.price-note {
  font-size: 12.5px;
  color: var(--accent-emerald);
  margin-bottom: 24px;
}

.pricing-features-list {
  margin: 10px 0 32px;
  flex: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.pricing-features-list li svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.pricing-features-list li.highlight {
  color: #fff;
  font-weight: 600;
}

.pricing-card .btn {
  width: 100%;
}

/* ==========================================================================
   Multi-Platform Clients Hub
   ========================================================================== */
.clients-section {
  padding: 80px 0;
}

.clients-container {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 44px;
  backdrop-filter: blur(14px);
}

.client-tabs-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 38px;
  flex-wrap: wrap;
}

.client-tab-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 10px 22px;
  border-radius: 12px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.client-tab-btn svg {
  width: 18px;
  height: 18px;
}

.client-tab-btn:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.client-tab-btn.active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.client-content-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.client-content-panel.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.client-info h3 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.client-info p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 22px;
}

.client-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.client-step-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-desc {
  font-size: 14px;
  color: var(--text-muted);
}

.step-desc strong {
  color: #fff;
}

.client-card-box {
  background: rgba(10, 13, 20, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 30px;
}

.software-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.software-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  transition: all var(--transition-fast);
}

.software-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(56, 189, 248, 0.3);
}

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

.sw-name {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}

.sw-desc {
  font-size: 12px;
  color: var(--text-dim);
}

.sw-btn {
  font-size: 13px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
}

/* ==========================================================================
   Step-by-step Quick Start
   ========================================================================== */
.steps-section {
  padding: 80px 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 36px 30px;
  position: relative;
  transition: all var(--transition-smooth);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.3);
}

.step-watermark {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 48px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
  line-height: 1;
}

.step-card-title {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.step-card-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   SEO Articles / Brand Insights (In-depth Guides)
   ========================================================================== */
.articles-section {
  padding: 90px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 36px;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
}

.article-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}

.article-title {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.45;
}

.article-excerpt {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 18px;
}

.article-link:hover {
  gap: 10px;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-dim);
  transition: transform var(--transition-smooth);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 26px;
}

.faq-answer p {
  padding-bottom: 22px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-section {
  padding: 80px 0 100px;
}

.cta-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18) 0%, rgba(124, 58, 237, 0.15) 100%);
  border: 1.5px solid rgba(56, 189, 248, 0.3);
  border-radius: 28px;
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: #05070a;
  padding: 80px 0 40px;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
  margin-top: 16px;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.footer-links-list li {
  margin-bottom: 12px;
}

.footer-links-list a {
  font-size: 13.5px;
  color: var(--text-dim);
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--primary);
}

/* Keyword Cloud for SEO */
.footer-seo-box {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 28px 0;
  margin-bottom: 28px;
}

.footer-seo-title {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-weight: 600;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.tag-cloud a {
  font-size: 12px;
  color: var(--text-dim);
  transition: color var(--transition-fast);
}

.tag-cloud a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 28px;
  font-size: 13px;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(18, 22, 34, 0.9);
  border: 1px solid var(--border-glow);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-cards-grid,
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .telemetry-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .telemetry-item:nth-child(2) {
    border-right: none;
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }

  .client-content-panel.active {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: rgba(7, 9, 14, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 18px;
  }

  .nav-menu.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .features-grid,
  .pricing-cards-grid,
  .steps-grid,
  .articles-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    padding: 30px 24px;
  }

  .service-card::after {
    display: none;
  }

  .status-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}