:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e2e8f0;
  --card-bg: #ffffff;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
}

.corporate-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
  position: sticky;
  top: 0;
  z-index: 50;
}

.corporate-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.corporate-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.corporate-menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.corporate-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.corporate-menu a:hover {
  color: var(--accent);
}

.corporate-hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #edf2f7 100%);
  padding: 5rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.corporate-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.corporate-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -1px;
}

.corporate-hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--accent-hover);
}

.corporate-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.5px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.corporate-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  background: var(--card-bg);
  transition: transform 0.2s, box-shadow 0.2s;
}

.corporate-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.corporate-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.corporate-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.post-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--card-bg);
  display: flex;
  flex-direction: column;
}

.post-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-tertiary);
}

.post-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.post-card-title a {
  text-decoration: none;
  color: var(--text-primary);
}

.post-card-title a:hover {
  color: var(--accent);
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  flex: 1;
}

.post-card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.corporate-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}