/* ═══════════════════════════════════════════════════
   Mrbeenet — Design System
   Inspired by quectel.com.cn professional B2B layout
   ═══════════════════════════════════════════════════ */

/* ── Custom Properties ─────────────────────────────── */
:root {
  /* Brand */
  --color-primary: #0F1B2D;
  --color-primary-light: #1A3356;
  --color-primary-lighter: #243B5E;
  --color-accent: #DC3545;
  --color-accent-hover: #C82333;
  --color-accent-soft: #FFF0F0;
  --color-gold: #E8A838;
  --color-gold-light: #FFF8E8;

  /* Neutral */
  --color-white: #FFFFFF;
  --color-bg: #F8F9FB;
  --color-bg-alt: #F0F2F5;
  --color-border: #E9ECEF;
  --color-border-light: #F0F2F5;
  --color-text: #212529;
  --color-text-secondary: #6C757D;
  --color-text-muted: #ADB5BD;
  --color-gray-100: #F8F9FB;
  --color-gray-200: #E9ECEF;
  --color-gray-300: #DEE2E6;
  --color-gray-400: #ADB5BD;
  --color-gray-500: #6C757D;
  --color-gray-600: #495057;
  --color-gray-700: #343A40;
  --color-gray-800: #212529;

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --leading-tight: 1.15;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 880px;
  --gutter: var(--space-6);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.10);

  /* Navigation */
  --nav-height: 72px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Reset & Base ─────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ── Typography ───────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

h1 { font-size: var(--text-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }

p  { line-height: var(--leading-relaxed); }
small { font-size: var(--text-sm); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.section-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
  max-width: 640px;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: var(--leading-relaxed);
}

/* ── Container ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

/* ── Section Spacing ──────────────────────────────── */
.section {
  padding: var(--space-20) 0;
}

.section-alt {
  background: var(--color-bg);
}

.section-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3 {
  color: var(--color-white);
}

/* ── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  padding: 0.75rem 1.75rem;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  line-height: 1.2;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(220, 52, 69, 0.30);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.30);
}

.btn-outline-light:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.10);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--text-base);
}

.btn-arrow::after {
  content: '→';
  transition: transform var(--transition-fast);
  display: inline-block;
}

.btn-arrow:hover::after {
  transform: translateX(4px);
}

/* ── Navigation ───────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.nav-scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  font-family: var(--font-display);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: var(--text-xl);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav-logo-text span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  height: 100%;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  cursor: pointer;
}

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

.nav-link.has-dropdown {
  gap: var(--space-1);
}

.nav-link .chevron {
  font-size: 10px;
  transition: transform var(--transition-fast);
}

.nav-link:hover .chevron {
  transform: rotate(180deg);
}

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

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3);
  min-width: 260px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.nav-item-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--border-radius);
  transition: background var(--transition-fast);
}

.nav-dropdown-item:hover {
  background: var(--color-bg);
}

.nav-dropdown-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius);
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
}

.nav-dropdown-text {
  flex: 1;
}

.nav-dropdown-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.nav-dropdown-desc {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.nav-cta {
  margin-left: var(--space-4);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-20)) 0 var(--space-20);
  background: var(--color-primary);
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 80%, rgba(220, 52, 69, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(232, 168, 56, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 100% 80% at 50% 100%, rgba(26, 51, 86, 0.4) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 1rem;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.80);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(4px);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22C55E;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, var(--text-6xl));
  color: var(--color-white);
  margin-bottom: var(--space-6);
  line-height: 1.08;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-accent), #FF6B6B);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.70);
  max-width: 600px;
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.10);
}

.hero-stat-value {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  margin-top: var(--space-1);
}

/* ── Card Grid ────────────────────────────────────── */
.card-grid {
  display: grid;
  gap: var(--space-6);
}

.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--space-5);
}

.card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}

.card-link:hover {
  gap: var(--space-3);
}

.card-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

/* ── Industry Cards (dark variant) ────────────────── */
.card-industry {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-8);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
}

.card-industry:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.card-industry-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--space-5);
}

.card-industry h3 {
  font-size: var(--text-lg);
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.card-industry p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  line-height: var(--leading-relaxed);
}

/* ── Platform Feature Cards ───────────────────────── */
.platform-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.platform-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.platform-card-top {
  padding: var(--space-8) var(--space-8) var(--space-6);
}

.platform-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: var(--space-5);
}

.platform-card-icon.red { background: var(--color-accent-soft); }
.platform-card-icon.blue { background: #EBF5FF; }
.platform-card-icon.green { background: #ECFDF5; }
.platform-card-icon.gold { background: var(--color-gold-light); }

.platform-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.platform-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.platform-card-features {
  list-style: none;
  padding: var(--space-4) var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-border-light);
}

.platform-card-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.platform-card-features li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: var(--weight-bold);
  font-size: var(--text-xs);
}

.platform-card-cta {
  display: block;
  padding: var(--space-4) var(--space-8);
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  border-top: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
}

.platform-card-cta:hover {
  background: var(--color-bg);
}

/* ── Stats / Numbers ──────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat-number {
  font-size: var(--text-5xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

/* ── Case Study Cards ─────────────────────────────── */
.case-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.case-card-image {
  height: 200px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--color-text-muted);
}

.case-card-body {
  padding: var(--space-6);
}

.case-card-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: 100px;
  margin-bottom: var(--space-3);
}

.case-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.case-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.case-card-result {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.case-result-item {
  text-align: center;
}

.case-result-value {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  line-height: 1;
}

.case-result-label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ── CTA Section ──────────────────────────────────── */
.cta-section {
  position: relative;
  padding: var(--space-24) 0;
  background: var(--color-primary);
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 50%, rgba(220, 52, 69, 0.10) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(232, 168, 56, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.65);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.cta-extra {
  margin-top: var(--space-8);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.40);
}

/* ── Section Header (centered) ────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header .section-label {
  justify-content: center;
}

.section-header .section-title {
  max-width: 640px;
  margin: 0 auto var(--space-4);
}

.section-header .section-subtitle {
  max-width: 560px;
  margin: 0 auto;
}

/* ── Page Hero (inner pages) ──────────────────────── */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-12);
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 80%, rgba(220, 52, 69, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 70% 20%, rgba(232, 168, 56, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  color: var(--color-white);
  font-size: clamp(2rem, 4vw, var(--text-5xl));
  margin-bottom: var(--space-4);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.65);
  font-size: var(--text-lg);
  max-width: 560px;
  line-height: var(--leading-relaxed);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: var(--space-6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

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

.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.25);
}

/* ── Footer ───────────────────────────────────────── */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.65);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  max-width: 320px;
  margin-top: var(--space-4);
}

.footer-logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.footer-qr {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.footer-qr-img {
  width: 100px;
  height: 100px;
  border-radius: var(--border-radius);
  border: 2px solid rgba(255, 255, 255, 0.10);
  display: block;
}

.footer-qr-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--weight-bold);
  font-size: var(--text-base);
}

.footer-logo-text {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  color: var(--color-white);
}

.footer-logo-text span {
  color: var(--color-accent);
}

.footer h4 {
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-5);
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: var(--space-3);
}

.footer a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.35);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.35);
  font-size: var(--text-sm);
}

.footer-bottom-links a:hover {
  color: rgba(255, 255, 255, 0.65);
}

/* ── About Page ───────────────────────────────────── */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-intro-text h2 {
  margin-bottom: var(--space-6);
}

.about-intro-text p {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.about-intro-visual {
  background: var(--color-bg-alt);
  border-radius: var(--border-radius-xl);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  color: var(--color-text-muted);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.value-card {
  text-align: center;
  padding: var(--space-8);
}

.value-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto var(--space-5);
}

/* ── Contact Page ─────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast);
  outline: none;
  background: var(--color-white);
  color: var(--color-text);
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(220, 52, 69, 0.10);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

textarea.form-input {
  min-height: 140px;
  resize: vertical;
}

.contact-info {
  padding-top: var(--space-4);
}

.contact-info h3 {
  margin-bottom: var(--space-6);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius);
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.contact-info-text h4 {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-1);
}

.contact-info-text p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ── Platform Detail Page ─────────────────────────── */
.platform-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.platform-detail-visual {
  background: var(--color-bg-alt);
  border-radius: var(--border-radius-xl);
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
  color: var(--color-text-muted);
}

.platform-detail h2 {
  margin-bottom: var(--space-5);
}

.platform-detail p {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

/* ── Feature List ─────────────────────────────────── */
.feature-checklist {
  list-style: none;
  margin: var(--space-6) 0;
}

.feature-checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.feature-checklist li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: var(--weight-bold);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── Results Grid (case studies) ──────────────────── */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.result-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
}

/* ── Animations ───────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.6s ease forwards;
}

.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }
.fade-in-delay-4 { animation-delay: 0.4s; }

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

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 1024px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .about-intro { gap: var(--space-8); }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
    --gutter: var(--space-5);
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

  .section { padding: var(--space-12) 0; }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    gap: var(--space-1);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    height: auto;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-link {
    height: auto;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius);
  }

  .nav-link:hover {
    background: var(--color-bg);
  }

  .nav-dropdown {
    position: static;
    box-shadow: none;
    border: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding: 0 0 0 var(--space-4);
    display: none;
  }

  .nav-item-dropdown.open .nav-dropdown {
    display: block;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--space-3);
  }

  .nav-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--space-12)) 0 var(--space-12);
  }

  .hero h1 { font-size: var(--text-4xl); }
  .hero p { font-size: var(--text-lg); }
  .hero-stats { flex-wrap: wrap; gap: var(--space-8); }
  .hero-stats > * { flex: 1; min-width: 120px; }

  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .stat-number { font-size: var(--text-4xl); }

  .section-header { margin-bottom: var(--space-10); }

  .about-intro,
  .contact-grid,
  .platform-detail {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .about-intro-visual { height: 240px; font-size: 48px; }

  .values-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root { --gutter: var(--space-4); }

  h1 { font-size: var(--text-3xl); }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .cta-actions {
    flex-direction: column;
  }

  .cta-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

/* ── Reduced Motion ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
}

/* ── Focus Styles ─────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── Print ────────────────────────────────────────── */
@media print {
  .nav,
  .cta-section,
  .footer {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}