:root {
  --color-primary: #0a1628;
  --color-secondary: #1a2d4a;
  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-green: #10b981;
  --color-green-light: #34d399;
  --color-bg: #0a1628;
  --color-bg-light: #111d32;
  --color-bg-card: #162033;
  --color-text: #ffffff;
  --color-text-muted: #94a3b8;
  --color-border: rgba(255,255,255,0.08);
  --font-en: 'Outfit', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-jp);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  overflow-x: hidden;
}

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

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

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-green));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
}

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

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

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

.nav-cta {
  padding: 0.7rem 1.5rem;
  background: var(--color-accent);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff !important;
}

.nav-cta:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

.nav-cta::after {
  display: none !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

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

.hero-bg-image {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a1628 0%, #1a2d4a 50%, #0f2744 100%);
}

.hero-bg-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

.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;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero-inner {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--color-accent-light);
  margin-bottom: 1.5rem;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-title-gradient {
  background: linear-gradient(135deg, #fff 0%, #60a5fa 50%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  line-height: 1.9;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  box-shadow: 0 10px 40px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 50px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: rgba(255,255,255,0.05);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}

.hero-stats {
  display: flex;
  gap: 3rem;
}

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

.hero-stat-value {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-green), var(--color-green-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.hero-visual {
  position: relative;
}

.hero-card-stack {
  position: relative;
  height: 500px;
}

.hero-floating-card {
  position: absolute;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 25px 80px rgba(0,0,0,0.4);
  backdrop-filter: blur(10px);
}

.hero-card-main {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 320px;
  z-index: 3;
}

.hero-card-sub1 {
  top: 10%;
  right: 0;
  width: 200px;
  z-index: 2;
  animation: float 6s ease-in-out infinite;
}

.hero-card-sub2 {
  bottom: 10%;
  left: 0;
  width: 220px;
  z-index: 1;
  animation: float 6s ease-in-out infinite 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-chip {
  padding: 0.3rem 0.8rem;
  background: rgba(16, 185, 129, 0.15);
  border-radius: 50px;
  font-size: 0.7rem;
  color: var(--color-green-light);
  font-weight: 600;
}

.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.card-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.card-chart {
  height: 100px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, transparent 100%);
  border-radius: 12px;
  margin: 1rem 0;
  display: flex;
  align-items: flex-end;
  padding: 0.75rem;
  gap: 0.5rem;
}

.chart-bar {
  flex: 1;
  border-radius: 6px 6px 2px 2px;
  transition: var(--transition);
}

.chart-bar:nth-child(1) { height: 30%; background: rgba(59, 130, 246, 0.4); }
.chart-bar:nth-child(2) { height: 45%; background: rgba(59, 130, 246, 0.5); }
.chart-bar:nth-child(3) { height: 60%; background: rgba(59, 130, 246, 0.6); }
.chart-bar:nth-child(4) { height: 90%; background: linear-gradient(180deg, var(--color-green), var(--color-green-light)); }

.card-metric {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.card-metric-value {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 700;
}

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

/* Section Common */
section {
  padding: 6rem 2rem;
  position: relative;
}

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

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Concept Section */
.concept {
  background: var(--color-bg-light);
}

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

.concept-visual {
  position: relative;
}

.concept-image {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-bg));
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}

.concept-image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  background: 
    linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    linear-gradient(225deg, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

.concept-content h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

.concept-content p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 2;
}

.concept-list {
  list-style: none;
}

.concept-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.concept-list li::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-green);
  border-radius: 50%;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 2rem;
  transition: var(--transition);
  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), var(--color-green));
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 25px 60px rgba(0,0,0,0.3);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(16, 185, 129, 0.15));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.service-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.service-tag {
  padding: 0.4rem 0.8rem;
  background: rgba(255,255,255,0.05);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Cases Section */
.cases {
  background: var(--color-bg-light);
}

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

.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.case-card-featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.case-image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-bg));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.case-card-featured .case-image {
  height: 100%;
  min-height: 300px;
}

.case-content {
  padding: 1.5rem;
}

.case-card-featured .case-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.case-category {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.case-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.case-card-featured .case-content h3 {
  font-size: 1.4rem;
}

.case-content p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.case-metrics {
  display: flex;
  gap: 1.5rem;
}

.case-metric {
  text-align: left;
}

.case-metric-value {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-green);
}

.case-metric-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content h3 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.about-content p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 2;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.about-feature {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 1.25rem;
}

.about-feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.about-feature h4 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.about-feature p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.about-visual {
  position: relative;
}

.about-image {
  width: 100%;
  height: 450px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-bg));
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Contact Section */
.contact {
  background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
}

.contact-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-card {
  background: linear-gradient(135deg, var(--color-accent), #2563eb);
  border-radius: 32px;
  padding: 4rem 3rem;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.contact-card h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  position: relative;
}

.contact-card p {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  line-height: 1.8;
  position: relative;
}

.contact-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  position: relative;
}

.contact-email {
  font-size: 1.2rem;
  font-weight: 600;
  padding: 1rem 2rem;
  background: rgba(255,255,255,0.15);
  border-radius: 12px;
  backdrop-filter: blur(10px);
}

.contact-email a {
  color: #fff;
}

.contact-note {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Footer */
footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 3rem 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
}

.footer-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-green));
  border-radius: 8px;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

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

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

.footer-copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-cta-group {
    justify-content: center;
  }

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

  .hero-visual {
    display: none;
  }

  .concept-grid,
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

  .case-card-featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .case-card-featured .case-image {
    min-height: 200px;
  }
}

@media (max-width: 768px) {
  header {
    padding: 0.75rem 1rem;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  section {
    padding: 4rem 1rem;
  }

  .hero {
    padding: 6rem 1rem 3rem;
    min-height: auto;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .contact-card {
    padding: 2.5rem 1.5rem;
  }
}