/* ===================================================================
   西藏慧软智能科技有限公司 — Official Website Stylesheet
   Design System: Trust & Authority | Navy + Blue CTA
   Typography: Lexend / Source Sans 3
   =================================================================== */

/* --- Local Fonts --- */
@font-face {
  font-family: 'Lexend';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url('fonts/Lexend-Light.ttf') format('truetype');
}
@font-face {
  font-family: 'Lexend';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/Lexend-Regular.ttf') format('truetype');
}
@font-face {
  font-family: 'Lexend';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/Lexend-Medium.ttf') format('truetype');
}
@font-face {
  font-family: 'Lexend';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/Lexend-SemiBold.ttf') format('truetype');
}
@font-face {
  font-family: 'Lexend';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/Lexend-Bold.ttf') format('truetype');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url('fonts/SourceSans3-Light.ttf') format('truetype');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/SourceSans3-Regular.ttf') format('truetype');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/SourceSans3-Medium.ttf') format('truetype');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/SourceSans3-SemiBold.ttf') format('truetype');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/SourceSans3-Bold.ttf') format('truetype');
}

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-primary: #0F172A;
  --color-on-primary: #FFFFFF;
  --color-secondary: #334155;
  --color-accent: #0369A1;
  --color-accent-light: #0284C7;
  --color-accent-dark: #075985;
  --color-background: #F8FAFC;
  --color-foreground: #020617;
  --color-muted: #E8ECF1;
  --color-muted-foreground: #64748B;
  --color-border: #E2E8F0;
  --color-destructive: #DC2626;
  --color-ring: #0F172A;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;

  /* Typography */
  --font-heading: 'Lexend', sans-serif;
  --font-body: 'Source Sans 3', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing (4pt grid) */
  --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;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-foreground);
  background-color: var(--color-background);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--color-primary);
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section-label {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--font-size-lg);
  color: var(--color-muted-foreground);
  max-width: 640px;
  margin: 0 auto var(--space-12);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  min-height: 44px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-on-primary);
  border: 1.5px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-ghost:hover {
  background-color: var(--color-accent);
  color: var(--color-on-primary);
}

/* ======================================================
   HEADER / NAVIGATION
   ====================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
}

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

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

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

.header-cta .btn {
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-5);
  min-height: 38px;
}

/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ======================================================
   HERO SECTION
   ====================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1E293B 50%, var(--color-accent-dark) 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(15, 23, 42, 0.7) 0%,
    rgba(15, 23, 42, 0.5) 50%,
    rgba(15, 23, 42, 0.85) 100%
  );
  z-index: 1;
}

/* Animated particles */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: rgba(3, 105, 161, 0.5);
  border-radius: 50%;
  animation: particle-float linear infinite;
}

@keyframes particle-float {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 3;
  padding-top: var(--header-height);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(3, 105, 161, 0.15);
  border: 1px solid rgba(3, 105, 161, 0.3);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-8);
  backdrop-filter: blur(8px);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: #22D3EE;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-size: var(--font-size-6xl);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  max-width: 800px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, #22D3EE, #0284C7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: var(--space-10);
}

.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-10);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
}

/* ======================================================
   CLIENTS / TRUST BAR
   ====================================================== */
.trust-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}

.trust-bar-label {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  text-align: center;
  margin-bottom: var(--space-8);
  letter-spacing: 0.05em;
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.trust-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-muted-foreground);
  opacity: 0.55;
  transition: opacity var(--transition-normal);
}

.trust-logo:hover {
  opacity: 1;
}

.trust-logo svg {
  width: 28px;
  height: 28px;
}

/* ======================================================
   SERVICES SECTION
   ====================================================== */
.services { background: var(--color-background); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #22D3EE);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(3, 105, 161, 0.1), rgba(3, 105, 161, 0.05));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
}

.service-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
  transition: color var(--transition-normal);
}

.service-card:hover .service-icon svg {
  color: #FFFFFF;
}

.service-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.service-card p {
  font-size: var(--font-size-base);
  color: var(--color-muted-foreground);
  line-height: 1.7;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.service-tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(3, 105, 161, 0.08);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* ======================================================
   ABOUT SECTION
   ====================================================== */
.about {
  background: var(--color-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.about-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(3, 105, 161, 0.15);
}

.about-content .section-label { text-align: left; }
.about-content .section-title { text-align: left; font-size: var(--font-size-3xl); }

.about-text {
  color: var(--color-muted-foreground);
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

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

.about-highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.about-highlight-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: rgba(3, 105, 161, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-highlight-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.about-highlight h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.about-highlight p {
  font-size: var(--font-size-xs);
  color: var(--color-muted-foreground);
}

/* ======================================================
   SOLUTIONS SECTION
   ====================================================== */
.solutions { background: var(--color-background); }

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

.solution-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  display: flex;
  gap: var(--space-6);
  transition: all var(--transition-normal);
}

.solution-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(3, 105, 161, 0.2);
}

.solution-number {
  font-family: var(--font-heading);
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: rgba(3, 105, 161, 0.1);
  line-height: 1;
  min-width: 60px;
}

.solution-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.solution-card p {
  color: var(--color-muted-foreground);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.solution-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.solution-feature {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-secondary);
  background: var(--color-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.solution-feature svg {
  width: 12px;
  height: 12px;
  color: var(--color-accent);
}

/* ======================================================
   ADVANTAGES / WHY US
   ====================================================== */
.advantages {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1E293B 100%);
  color: #FFFFFF;
}

.advantages .section-label {
  color: #22D3EE;
}

.advantages .section-title {
  color: #FFFFFF;
}

.advantages .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.advantage-card {
  text-align: center;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-normal);
}

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

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  background: rgba(3, 105, 161, 0.2);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-icon svg {
  width: 32px;
  height: 32px;
  color: #22D3EE;
}

.advantage-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: var(--space-3);
}

.advantage-card p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

/* ======================================================
   CASE STUDIES
   ====================================================== */
.cases { background: var(--color-surface); }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.case-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.case-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.case-image-inner {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-heading);
}

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

.case-industry {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.case-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.case-card p {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.case-metrics {
  display: flex;
  gap: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.case-metric strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
}

.case-metric span {
  font-size: var(--font-size-xs);
  color: var(--color-muted-foreground);
}

/* ======================================================
   CONTACT / CTA SECTION
   ====================================================== */
.contact {
  background: var(--color-background);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(3, 105, 161, 0.2);
}

.contact-card .contact-item-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  background: rgba(3, 105, 161, 0.08);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-card .contact-item-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
}

.contact-card strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.contact-card span {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  line-height: 1.5;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info .section-label { text-align: left; }
.contact-info .section-title { text-align: left; font-size: var(--font-size-3xl); }

.contact-info p {
  color: var(--color-muted-foreground);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: rgba(3, 105, 161, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.contact-item-text strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-item-text span {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}

.contact-form-wrapper h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-6);
}

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

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-secondary);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-foreground);
  background: var(--color-background);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.contact-form-wrapper .btn {
  width: 100%;
  padding: var(--space-4);
}

/* ======================================================
   FOOTER
   ====================================================== */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo-text {
  color: #FFFFFF;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-width: 320px;
  margin-top: var(--space-4);
}

.footer h4 {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: var(--space-5);
  letter-spacing: 0.03em;
}

.footer-links a {
  display: block;
  font-size: var(--font-size-sm);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #22D3EE;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) 0;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

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

.footer-bottom-links a {
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* ======================================================
   SCROLL ANIMATIONS
   ====================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* Counter animation */
.counter { display: inline-block; }

/* ======================================================
   BACK TO TOP
   ====================================================== */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ======================================================
   RESPONSIVE
   ====================================================== */
@media (max-width: 1024px) {
  .hero h1 { font-size: var(--font-size-5xl); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .nav-links, .header-cta { display: none; }
  .mobile-toggle { display: flex; }

  /* Mobile menu */
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-8);
    gap: var(--space-4);
    z-index: 999;
  }

  .nav-links.mobile-open a {
    font-size: var(--font-size-lg);
    padding: var(--space-3) 0;
  }

  .section { padding: var(--space-12) 0; }
  .section-title { font-size: var(--font-size-3xl); }

  .hero { min-height: auto; padding: var(--space-24) 0 var(--space-16); }
  .hero h1 { font-size: var(--font-size-4xl); }
  .hero-desc { font-size: var(--font-size-base); }
  .hero-stats { flex-direction: column; gap: var(--space-6); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

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

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

  .advantages-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr 1fr; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); text-align: center; }
}

@media (max-width: 375px) {
  .hero h1 { font-size: var(--font-size-3xl); }
  .container { padding: 0 var(--space-4); }
}

/* 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; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .particle { animation: none; display: none; }
}