/* ============================================================
   CSS RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: #050c18;
  color: #e5e7eb;
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul { list-style: none; }

/* ============================================================
   CSS CUSTOM PROPERTIES (Dark Theme)
   ============================================================ */
:root {
  --bg: #050c18;
  --fg: #e5e7eb;
  --primary: #00c8ff;
  --primary-fg: #050c18;
  --card: #0a1628;
  --card-fg: #e5e7eb;
  --secondary: rgba(255,255,255,0.04);
  --secondary-fg: #e5e7eb;
  --muted: rgba(255,255,255,0.06);
  --muted-fg: #8b8fa3;
  --border: rgba(0,200,255,0.12);
  --destructive: #d4183d;
  --destructive-fg: #ffffff;
  --green: #00ff9d;
  --orange: #ff6b35;
  --purple: #a855f7;
  --blue2: #0080ff;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
}

/* ============================================================
   TYPOGRAPHY & UTILITY
   ============================================================ */
.font-mono { font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace; }
.font-sc { font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--muted-fg); }
.text-destructive { color: var(--destructive); }
.text-green { color: var(--green); }
.text-orange { color: var(--orange); }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.tracking-widest { letter-spacing: 0.1em; }
.tracking-wider { letter-spacing: 0.05em; }
.uppercase { text-transform: uppercase; }
.text-center { text-align: center; }

/* Layout */
.max-w-7xl { max-width: 1280px; margin-left: auto; margin-right: auto; }
.max-w-4xl { max-width: 896px; margin-left: auto; margin-right: auto; }
.max-w-2xl { max-width: 672px; margin-left: auto; margin-right: auto; }
.max-w-xl { max-width: 576px; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-12 { margin-bottom: 3rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.grid { display: grid; }
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.overflow-hidden { overflow: hidden; }
.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }
.transition-all { transition: all 0.3s ease; }
.transition-colors { transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease; }
.transition-transform { transition: transform 0.7s ease; }
.pointer-events-none { pointer-events: none; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-1 { flex: 1 1 0%; }
.self-stretch { align-self: stretch; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.h-px { height: 1px; }
.w-px { width: 1px; }
.inline-flex { display: inline-flex; }
.leading-tight { line-height: 1.25; }
.leading-relaxed { line-height: 1.625; }
.leading-none { line-height: 1; }

/* ============================================================
   COMPONENT STYLES
   ============================================================ */

/* Section Label */
.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.section-label-line {
  width: 1rem;
  height: 1px;
  background: var(--primary);
}
.section-label-text {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.1em;
}

/* Section background variants */
.bg-secondary-section { background: var(--secondary); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: all 0.3s ease;
  height: 4rem;
}
.nav.scrolled {
  background: rgba(5,12,24,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,200,255,0.12);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-logo-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-fg);
}
.nav-logo-text .company {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.025em;
  line-height: 1;
  color: var(--fg);
}
.nav-logo-text .subtitle {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav-links-desktop {
  display: none;
  align-items: center;
  gap: 2rem;
}
.nav-links-desktop a {
  font-size: 0.875rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--muted-fg);
  transition: color 0.2s;
}
.nav-links-desktop a:hover { color: var(--fg); }
.nav-cta {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--primary);
  color: var(--primary-fg);
  border-radius: var(--radius);
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.9; }
.nav-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg);
  width: 2.5rem;
  height: 2.5rem;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 4rem;
  left: 0;
  right: 0;
  background: rgba(5,12,24,0.98);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  flex-direction: column;
  gap: 1rem;
  z-index: 49;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 0.875rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--muted-fg);
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--fg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: 6rem 0 4rem;
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(0,200,255,1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,1) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-glow-1 {
  position: absolute;
  top: 33%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 600px;
  border-radius: 50%;
  background: rgba(0,200,255,0.08);
  filter: blur(120px);
  pointer-events: none;
}
.hero-glow-2 {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(0,128,255,0.06);
  filter: blur(80px);
  pointer-events: none;
}
.hero-content {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 6rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(0,200,255,0.3);
  background: rgba(0,200,255,0.08);
  margin-bottom: 2rem;
}
.hero-badge-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}
.hero-badge-text {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--fg);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.hero-title .highlight { color: var(--primary); }
.hero-desc {
  font-size: 1rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--muted-fg);
  line-height: 1.625;
  margin-bottom: 2.5rem;
  max-width: 32rem;
}
.hero-desc strong { color: var(--fg); font-weight: 500; }
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--primary);
  color: var(--primary-fg);
  font-weight: 600;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  border-radius: var(--radius);
  transition: opacity 0.2s;
  font-size: 0.875rem;
}
.btn-primary:hover { opacity: 0.9; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  border-radius: var(--radius);
  transition: all 0.2s;
  font-size: 0.875rem;
}
.btn-outline:hover { border-color: rgba(0,200,255,0.5); color: var(--primary); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 1rem 2rem; }
.hero-stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}
.hero-stat-label {
  font-size: 0.75rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--muted-fg);
  margin-top: 0.125rem;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.4;
}
.hero-scroll-line {
  width: 1px;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, rgba(0,200,255,0.6));
}
.hero-scroll-text {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Dashboard Mockup */
.dashboard {
  display: none;
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--card);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,200,255,0.1);
}
.dashboard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}
.dashboard-live-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}
.dashboard-live-text {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.05em;
}
.dashboard-time {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
}
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding: 1rem;
}
.dashboard-stat-card {
  background: rgba(255,255,255,0.03);
  border-radius: 0.5rem;
  padding: 0.75rem;
}
.dashboard-stat-label {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  margin-bottom: 0.25rem;
}
.dashboard-stat-val {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}
.dashboard-stat-val.cyan { color: var(--primary); }
.dashboard-stat-val.green { color: var(--green); }
.dashboard-stat-val.orange { color: var(--orange); }
.dashboard-stat-unit {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted-fg);
  margin-left: 0.125rem;
}
.dashboard-chart {
  padding: 0 1rem 1rem;
}
.dashboard-chart-label {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  margin-bottom: 0.5rem;
}
.dashboard-chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 1px;
  height: 4rem;
}
.dashboard-chart-bar {
  flex: 1;
  border-radius: 2px 2px 0 0;
  background: rgba(0,200,255,0.6);
  transition: all 0.7s ease;
}
.dashboard-chart-bar.active { background: rgba(0,200,255,1); }
.dashboard-events {
  margin: 0 1rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  overflow: hidden;
}
.dashboard-events-header {
  background: rgba(255,255,255,0.03);
  padding: 0.375rem 0.75rem;
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
}
.dashboard-event {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  background: rgba(255,255,255,0.02);
}
.dashboard-event-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  flex-shrink: 0;
}
.dashboard-event-dot.green { background: var(--green); }
.dashboard-event-dot.orange { background: var(--orange); }
.dashboard-event-dot.cyan { background: var(--primary); }
.dashboard-event-msg {
  font-size: 0.625rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--fg);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dashboard-event-time {
  font-size: 0.5625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
}

/* ============================================================
   PAIN POINTS
   ============================================================ */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.pain-card {
  position: relative;
  padding: 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--card);
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(1.5rem);
}
.pain-card.visible { opacity: 1; transform: translateY(0); }
.pain-card:hover { border-color: rgba(0,200,255,0.4); }
.pain-card-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius);
  background: rgba(212,24,61,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  color: var(--destructive);
}
.pain-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 0.375rem;
}
.pain-card-desc {
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
}
.pain-solution-card {
  padding: 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(0,200,255,0.4);
  background: rgba(0,200,255,0.08);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transform: translateY(1.5rem);
  transition: all 0.3s ease;
}
.pain-solution-card.visible { opacity: 1; transform: translateY(0); }
.pain-solution-tag {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.pain-solution-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 0.5rem;
}
.pain-solution-desc {
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
}
.pain-solution-link {
  margin-top: 1rem;
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap 0.2s;
}
.pain-solution-link:hover { gap: 0.5rem; }

/* ============================================================
   ARCHITECTURE
   ============================================================ */
.arch-layer {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  transition: all 0.5s ease;
  margin-bottom: 0.75rem;
  opacity: 0;
  transform: translateX(-2rem);
}
.arch-layer.visible { opacity: 1; transform: translateX(0); }
.arch-layer-label {
  flex-shrink: 0;
  width: 5rem;
  text-align: right;
}
.arch-layer-en {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  letter-spacing: 0.1em;
}
.arch-layer-cn {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-top: 0.125rem;
}
.arch-layer-divider {
  width: 1px;
  align-self: stretch;
  opacity: 0.4;
}
.arch-layer-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.arch-layer-tag {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  border-radius: 2px;
  border: 1px solid;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}
.arch-note {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  align-items: center;
  gap: 0.5rem;
}
.arch-note-line {
  width: 3rem;
  height: 1px;
  background: var(--border);
}

/* ============================================================
   FEATURES
   ============================================================ */
.features-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.features-list { display: flex; flex-direction: column; gap: 1px; }
.feature-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  text-align: left;
  transition: all 0.2s;
  font-size: 0.875rem;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: var(--muted-fg);
  border: 1px solid transparent;
  background: transparent;
}
.feature-btn:hover { background: var(--card); color: var(--fg); }
.feature-btn.active {
  background: rgba(0,200,255,0.15);
  border-color: rgba(0,200,255,0.3);
  color: var(--fg);
}
.feature-btn .icon { flex-shrink: 0; transition: color 0.2s; }
.feature-btn.active .icon { color: var(--primary); }
.feature-btn .chevron { margin-left: auto; color: var(--primary); display: none; }
.feature-btn.active .chevron { display: block; }

.feature-detail {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--card);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: opacity 0.3s;
}
.feature-detail-tag {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.feature-detail-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.5rem;
  background: rgba(0,200,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--primary);
}
.feature-detail-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 1rem;
}
.feature-detail-desc {
  font-size: 0.875rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.625;
}
.feature-detail-caps {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.feature-detail-caps-label {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.feature-detail-caps-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.feature-cap {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: 2px;
  background: var(--secondary);
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}
.feature-cap svg { color: var(--primary); flex-shrink: 0; }

/* ============================================================
   SCENARIOS
   ============================================================ */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.scenario-card {
  position: relative;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.5s ease;
  background: var(--card);
  opacity: 0;
  transform: translateY(2rem);
}
.scenario-card.visible { opacity: 1; transform: translateY(0); }
.scenario-card:hover { border-color: rgba(0,200,255,0.5); box-shadow: 0 10px 30px -10px rgba(0,200,255,0.1); }
.scenario-img-wrap {
  position: relative;
  height: 10rem;
  background: var(--secondary);
  overflow: hidden;
}
.scenario-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s;
  opacity: 0.6;
}
.scenario-card:hover .scenario-img-wrap img { transform: scale(1.05); }
.scenario-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent, rgba(10,22,40,0.9));
}
.scenario-img-icon {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: rgba(10,22,40,0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--primary);
}
.scenario-body { padding: 1.25rem; }
.scenario-subtitle {
  font-size: 0.625rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  margin-bottom: 0.25rem;
}
.scenario-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 0.5rem;
}
.scenario-desc {
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
  margin-bottom: 1rem;
}
.scenario-tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.scenario-tag {
  padding: 0.125rem 0.5rem;
  font-size: 0.625rem;
  border-radius: 2px;
  background: var(--secondary);
  color: var(--muted-fg);
  border: 1px solid var(--border);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}

/* ============================================================
   TECH
   ============================================================ */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.tech-card {
  padding: 1.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--card);
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(1.5rem);
}
.tech-card.visible { opacity: 1; transform: translateY(0); }
.tech-card:hover { border-color: rgba(0,200,255,0.3); background: rgba(10,22,40,0.8); }
.tech-card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  background: rgba(0,200,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--primary);
  transition: background 0.2s;
}
.tech-card:hover .tech-card-icon { background: rgba(0,200,255,0.2); }
.tech-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 0.5rem;
}
.tech-card-desc {
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
}

/* ============================================================
   SECURITY & OPS
   ============================================================ */
.security-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.security-card {
  padding: 1.5rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--card);
  transition: all 0.5s ease;
  opacity: 0;
  transform: translateY(2rem);
}
.security-card.visible { opacity: 1; transform: translateY(0); }
.security-card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  background: rgba(0,200,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--primary);
}
.security-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  margin-bottom: 1rem;
}
.security-list { display: flex; flex-direction: column; gap: 0.625rem; }
.security-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.security-list li svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.125rem;
}
.security-list li span {
  font-size: 0.75rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}

/* ============================================================
   CTA
   ============================================================ */
.cta-section {
  position: relative;
  overflow: hidden;
  background: var(--secondary);
}
.cta-grid {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image:
    linear-gradient(rgba(0,200,255,1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,1) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.cta-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 200px;
  background: rgba(0,200,255,0.1);
  filter: blur(80px);
  pointer-events: none;
}
.cta-content { position: relative; }
.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(0,200,255,0.3);
  background: rgba(0,200,255,0.08);
  margin-bottom: 2rem;
}
.cta-badge-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}
.cta-badge-text {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.cta-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.25;
  margin-bottom: 1.5rem;
}
.cta-title .highlight { color: var(--primary); }
.cta-desc {
  font-size: 1rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  line-height: 1.625;
  margin-bottom: 2.5rem;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}
.cta-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem 1.5rem;
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
}
.cta-trust span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.cta-trust svg { color: var(--primary); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.footer-logo-icon {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-fg);
}
.footer-text {
  font-size: 0.875rem;
  color: var(--muted-fg);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}
.footer-copy {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
}
.footer-beian {
  font-size: 0.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--muted-fg);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-beian:hover { color: var(--primary); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(2rem); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-2rem); }
  to { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */
@media (min-width: 640px) {
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 2.5rem; }
}

@media (min-width: 768px) {
  .nav-links-desktop { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-menu-btn { display: none; }
  .security-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-title { font-size: 3rem; }
  .footer-inner { flex-direction: row; }
}

@media (min-width: 1024px) {
  .hero-content { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 3.75rem; }
  .dashboard { display: block; }
  .pain-grid { grid-template-columns: repeat(3, 1fr); }
  .features-layout { grid-template-columns: 2fr 3fr; }
  .scenarios-grid { grid-template-columns: repeat(3, 1fr); }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-title { font-size: 3rem; }
}

@media (min-width: 1280px) {
  .pain-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   LUCIDE ICON SIZING
   ============================================================ */
.lucide { display: block; }
.lucide-sm { width: 0.75rem; height: 0.75rem; }
.lucide-md { width: 1rem; height: 1rem; }
.lucide-lg { width: 1.25rem; height: 1.25rem; }
.lucide-xl { width: 1.5rem; height: 1.5rem; }
.lucide-2xl { width: 2rem; height: 2rem; }

/* SVG fallback styling */
.icon-fallback { display: inline-block; vertical-align: middle; }