/* ============================================
   GrandHive | 光合科技 - 企业官网样式表
   Domain: grandhive.cn
   Style: 简约大气 / Minimalist & Elegant
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand Colors - 光合科技品牌色系 */
  --color-primary: #0D4B5C;        /* 深青蓝 - 科技感 */
  --color-primary-light: #1A6B7E;  /* 浅青蓝 */
  --color-primary-dark: #062E38;   /* 极深青蓝 */
  --color-accent: #D4A93C;         /* 金色 - 六边形品牌标识 */
  --color-accent-light: #E8C560;
  --color-green: #2E7D5B;          /* 光合绿 */
  --color-green-light: #4CAF50;

  /* Neutral Colors */
  --color-bg: #FAFBFC;
  --color-bg-alt: #F2F5F7;
  --color-white: #FFFFFF;
  --color-text: #1A2332;
  --color-text-secondary: #4A5568;
  --color-text-light: #8896A6;
  --color-border: #E2E8F0;

  /* Typography */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(13, 75, 92, 0.06);
  --shadow-md: 0 4px 12px rgba(13, 75, 92, 0.08);
  --shadow-lg: 0 8px 32px rgba(13, 75, 92, 0.12);
  --shadow-xl: 0 16px 48px rgba(13, 75, 92, 0.16);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

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

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }

p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

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

a:hover {
  color: var(--color-primary-light);
}

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

ul, ol {
  list-style: none;
}

/* ---------- Layout Utilities ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-2xl);
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  padding: 4px 16px;
  background: rgba(13, 75, 92, 0.08);
  border-radius: 100px;
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  font-size: 1.0625rem;
}

.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

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

.btn--accent:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--lg {
  padding: 16px 40px;
  font-size: 1.0625rem;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition-base);
}

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

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

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

.nav-brand .hexagon-mini {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

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

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 8px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hexagon Brand Element ---------- */
.hexagon-logo {
  display: inline-block;
  position: relative;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: linear-gradient(135deg, #062E38 0%, #0D4B5C 50%, #1A6B7E 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(212, 169, 60, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(46, 125, 91, 0.06) 0%, transparent 50%);
}

.hero-bg-hex {
  position: absolute;
  opacity: 0.04;
  pointer-events: none;
}

.hero-bg-hex--1 {
  top: 10%;
  right: 5%;
  width: 400px;
  height: 400px;
  animation: float 8s ease-in-out infinite;
}

.hero-bg-hex--2 {
  bottom: 15%;
  left: 10%;
  width: 250px;
  height: 250px;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content {
  color: var(--color-white);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-md);
  padding: 6px 16px;
  background: rgba(212, 169, 60, 0.1);
  border: 1px solid rgba(212, 169, 60, 0.3);
  border-radius: 100px;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.25;
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-xl);
  max-width: 520px;
  line-height: 1.8;
}

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

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-hex-container {
  position: relative;
  width: 100%;
  max-width: 480px;
}

.hero-logo-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
  margin: 0 auto;
  filter: drop-shadow(0 12px 40px rgba(212, 169, 60, 0.35)) drop-shadow(0 4px 16px rgba(13, 75, 92, 0.5));
  animation: heroLogoFloat 6s ease-in-out infinite;
}

@keyframes heroLogoFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

/* Hero区 logo img 也支持小尺寸变体（响应式缩窄） */
@media (max-width: 768px) {
  .hero-logo-img { max-width: 320px; }
}

/* ---------- Service Cards Grid ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(13, 75, 92, 0.08), rgba(212, 169, 60, 0.08));
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.service-card-icon svg {
  width: 32px;
  height: 32px;
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.service-card p {
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.service-card .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(13, 75, 92, 0.06);
  color: var(--color-primary);
}

.tag--accent {
  background: rgba(212, 169, 60, 0.1);
  color: #8B7320;
}

.tag--green {
  background: rgba(46, 125, 91, 0.08);
  color: var(--color-green);
}

/* ---------- Stats Section ---------- */
.stats {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: var(--space-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat-item {
  color: var(--color-white);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

/* ---------- Feature List (for services page) ---------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  margin-bottom: var(--space-3xl);
}

.feature-block:nth-child(even) .feature-content {
  order: 2;
}

.feature-content h3 {
  margin-bottom: var(--space-md);
}

.feature-content p {
  margin-bottom: var(--space-md);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.feature-list li::before {
  content: '';
  display: block;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  background: var(--color-accent);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.feature-visual {
  background: linear-gradient(135deg, rgba(13, 75, 92, 0.04), rgba(212, 169, 60, 0.04));
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
}

/* ---------- Page Header (sub-pages) ---------- */
.page-header {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-2xl);
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(212, 169, 60, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 70% 50%, rgba(46, 125, 91, 0.04) 0%, transparent 40%);
}

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

.page-header h1 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.page-header p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.0625rem;
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-md);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

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

/* ---------- About Page: Timeline ---------- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--color-white);
  border: 3px solid var(--color-accent);
  border-radius: 50%;
}

.timeline-year {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-item h4 {
  margin-bottom: var(--space-xs);
}

/* ---------- Values Grid ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

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

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

.value-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(13, 75, 92, 0.08), rgba(212, 169, 60, 0.08));
  border-radius: 50%;
}

.value-card h4 {
  margin-bottom: var(--space-xs);
  font-size: 1.0625rem;
}

.value-card p {
  font-size: 0.875rem;
}

/* ---------- Contact Page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-info-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(13, 75, 92, 0.08), rgba(212, 169, 60, 0.08));
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

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

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 75, 92, 0.1);
  background: var(--color-white);
}

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

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

/* ---------- Compliance Disclaimer Box ---------- */
.compliance-box {
  background: rgba(212, 169, 60, 0.06);
  border: 1px solid rgba(212, 169, 60, 0.2);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
}

.compliance-box h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: #8B7320;
  margin-bottom: var(--space-xs);
}

.compliance-box p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle at 50% 50%, rgba(212, 169, 60, 0.08) 0%, transparent 60%);
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

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

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-lg);
  font-size: 1.0625rem;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-2xl) 0 var(--space-lg);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-md);
}

.footer-brand .hexagon-mini {
  width: 36px;
  height: 36px;
}

.footer-brand span {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer-col h5 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-accent-light);
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

.footer-icp {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-icp a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-icp a:hover {
  color: var(--color-accent-light);
}

/* ---------- AI Agent Badge ---------- */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  background: linear-gradient(135deg, rgba(46, 125, 91, 0.08), rgba(13, 75, 92, 0.08));
  border: 1px solid rgba(46, 125, 91, 0.2);
  border-radius: 100px;
  color: var(--color-green);
}

.ai-badge svg {
  width: 14px;
  height: 14px;
}

/* ---------- Knowledge Base Cards ---------- */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

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

.knowledge-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.knowledge-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 75, 92, 0.06);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.knowledge-card h4 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.knowledge-card p {
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: var(--space-sm);
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
    margin-bottom: var(--space-lg);
  }

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

  .hero-subtitle {
    margin: 0 auto var(--space-xl);
  }

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

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

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

  .feature-block {
    grid-template-columns: 1fr;
  }

  .feature-block:nth-child(even) .feature-content {
    order: 0;
  }

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

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

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

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

  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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