/* ============================================================
   Deng Fei — Anqing Deng Fei Trading Co., Ltd.
   Computer Systems Design & Related Services
   ============================================================ */

/* --- Root Variables --- */
:root {
  --color-base: #171A26;
  --color-darker: #0F1119;
  --color-surface: #20242F;
  --color-surface-light: #2A2E3D;
  --color-primary: #0EA5E9;
  --color-primary-bright: #22D3EE;
  --color-accent: #F87171;
  --color-accent-soft: #FB7185;
  --color-text: #F4F6F9;
  --color-muted: #98A2B3;
  --color-border: rgba(244, 246, 249, 0.08);
  --color-border-strong: rgba(244, 246, 249, 0.14);
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.55);
  --shadow-glow-cyan: 0 0 24px rgba(14, 165, 233, 0.3);
  --shadow-glow-coral: 0 0 24px rgba(248, 113, 113, 0.25);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-base);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

/* --- Utility --- */
.section-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-bright);
  background: rgba(34, 211, 238, 0.08);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-bright);
  border-color: var(--color-primary-bright);
  box-shadow: 0 6px 24px rgba(14, 165, 233, 0.45);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background: rgba(244, 246, 249, 0.06);
  border-color: var(--color-text);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-full {
  width: 100%;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(23, 26, 38, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
}

.logo-mark {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-bright));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #FFFFFF;
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.3);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(244, 246, 249, 0.04);
}

.nav-cta {
  margin-left: 0.75rem;
}

/* --- Mobile Toggle --- */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
  transform-origin: center;
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Mobile nav menu active */
@media (max-width: 880px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 5rem 1.5rem 2rem;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 1000;
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-link {
    width: 100%;
    font-size: 1.05rem;
    padding: 0.75rem 1rem;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 0.75rem;
    width: 100%;
  }

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

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 6rem 0 5rem;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(14, 165, 233, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse 40% 50% at 80% 80%, rgba(248, 113, 113, 0.06) 0%, transparent 60%),
              var(--color-base);
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* --- Hero Content --- */
.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary-bright);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.15);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-accent {
  background: linear-gradient(135deg, var(--color-primary-bright), var(--color-accent-soft));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

/* --- Hero Stats --- */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary-bright);
  line-height: 1.1;
  display: block;
}

.hero-stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Hero Visual (grid + orbs) --- */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 500px;
  margin: 0 auto;
}

.hero-visual .hero-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 6px;
  width: 100%;
  height: 100%;
  padding: 0;
  max-width: none;
}

.grid-cell {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
}

.grid-cell::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.grid-cell:hover::before {
  opacity: 1;
}

.grid-cell.active {
  background: rgba(14, 165, 233, 0.12);
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.2);
}

.grid-cell.active::before {
  opacity: 1;
}

/* --- Hero Decorative Orbs --- */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.25;
  z-index: 0;
  pointer-events: none;
}

.hero-orb.orb-1 {
  width: 300px;
  height: 300px;
  background: var(--color-primary);
  top: -80px;
  right: -60px;
  animation: orbFloat1 8s ease-in-out infinite;
}

.hero-orb.orb-2 {
  width: 220px;
  height: 220px;
  background: var(--color-accent);
  bottom: -40px;
  left: -50px;
  animation: orbFloat2 10s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-20px, 30px) scale(1.08); }
  66% { transform: translate(15px, -15px) scale(0.95); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(25px, -20px) scale(1.06); }
  66% { transform: translate(-10px, 15px) scale(0.94); }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services {
  padding: 6rem 0;
  background: var(--color-darker);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-bright));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

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

.service-icon {
  width: 52px;
  height: 52px;
  background: rgba(14, 165, 233, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-primary-bright);
  margin-bottom: 1.25rem;
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  background: rgba(14, 165, 233, 0.16);
  box-shadow: var(--shadow-glow-cyan);
}

.service-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.6rem;
}

.service-text {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.service-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary-bright);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding: 6rem 0;
  background: var(--color-base);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content {
  max-width: 540px;
}

.about-text {
  font-size: 1.05rem;
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.about-text p + p {
  margin-top: 1rem;
}

/* --- About Card --- */
.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-bottom: 1.75rem;
  transition: all var(--transition-base);
}

.about-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.about-card-accent {
  display: inline-block;
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-bright));
  border-radius: 2px;
  margin-bottom: 0.75rem;
}

.about-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.about-card-body {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* --- About Highlights --- */
.about-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.highlight-item {
  text-align: center;
  padding: 1.25rem 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.highlight-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-cyan);
}

.highlight-value {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary-bright);
  line-height: 1.1;
  margin-bottom: 0.3rem;
}

.highlight-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- About Principles --- */
.about-principles {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-left: 1.25rem;
}

.about-principles li {
  font-size: 0.95rem;
  color: var(--color-muted);
  list-style: disc;
  padding-left: 0.25rem;
}

.about-principles li::marker {
  color: var(--color-primary-bright);
}

/* --- About Visual --- */
.about-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(14, 165, 233, 0.06) 0%, transparent 40%),
              linear-gradient(200deg, rgba(248, 113, 113, 0.05) 70%, transparent 100%);
}

/* ============================================================
   PROCESS
   ============================================================ */
.process {
  padding: 6rem 0;
  background: var(--color-darker);
}

.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40px;
  width: 2px;
  background: var(--color-border-strong);
}

.process-step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  position: relative;
  padding: 2rem 0;
}

.step-marker {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 2px solid var(--color-border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-muted);
  transition: all var(--transition-base);
}

.process-step:hover .step-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-glow-cyan);
}

.step-line {
  display: none;
}

.step-content {
  padding-top: 0.35rem;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.step-duration {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary-bright);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* ============================================================
   INDUSTRIES
   ============================================================ */
.industries {
  padding: 6rem 0;
  background: var(--color-base);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.industry-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
  cursor: default;
}

.industry-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), var(--shadow-glow-cyan);
}

.industry-icon {
  width: 56px;
  height: 56px;
  background: rgba(14, 165, 233, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary-bright);
  transition: all var(--transition-base);
}

.industry-item:hover .industry-icon {
  background: rgba(14, 165, 233, 0.16);
}

.industry-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

/* ============================================================
   STATS BAND
   ============================================================ */
.stats {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--color-surface), var(--color-darker));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
  transition: transform var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-number {
  display: block;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--color-primary-bright);
  line-height: 1.1;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.stat-desc {
  display: block;
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials {
  padding: 6rem 0;
  background: var(--color-darker);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.7;
  font-style: italic;
  flex: 1;
}

.testimonial-stars {
  display: flex;
  gap: 3px;
  color: #FBBF24;
  font-size: 1.05rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.testimonial-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

.testimonial-role {
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding: 6rem 0;
  background: var(--color-base);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: flex-start;
}

.contact-info {
  max-width: 420px;
}

.contact-intro {
  font-size: 1.05rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.contact-item::before {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.contact-address {
  font-style: normal;
  line-height: 1.6;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* --- Contact Form --- */
.contact-form-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2.25rem;
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-base);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
  resize: vertical;
}

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

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

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

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-darker);
  border-top: 1px solid var(--color-border);
  padding: 5rem 0 0;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--color-border);
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.footer-about {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.65;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: all var(--transition-fast);
  padding: 0.2rem 0;
}

.footer-links a:hover {
  color: var(--color-primary-bright);
  padding-left: 0.3rem;
}

.footer-legal-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-legal-links a {
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: all var(--transition-fast);
  padding: 0.2rem 0;
}

.footer-legal-links a:hover {
  color: var(--color-primary-bright);
  padding-left: 0.3rem;
}

/* --- Footer Social --- */
.footer-social {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-muted);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-2px);
}

/* --- Footer Bottom --- */
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

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

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablet — up to 1024px */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-content {
    order: 1;
    max-width: 100%;
  }

  .hero-subtitle {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    order: 0;
    max-width: 380px;
  }

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

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

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

/* Small tablet / large phone — up to 880px */
@media (max-width: 880px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-visual {
    order: -1;
    max-height: 400px;
  }

  .about-highlights {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-timeline::before {
    left: 32px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-info {
    max-width: 100%;
  }

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

/* Phone — up to 640px */
@media (max-width: 640px) {
  .section-container {
    padding: 0 1.25rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .hero {
    min-height: auto;
    padding: 4rem 0 3.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 1.25rem;
    align-items: center;
  }

  .hero-visual {
    max-width: 280px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .industries-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 1.75rem 1.25rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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