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

:root {
  --navy: #1a1a2e;
  --blue: #2563eb;
  --blue-light: #dbeafe;
  --blue-bg: #f0f5ff;
  --green: #10b981;
  --green-light: #d1fae5;
  --purple: #8b5cf6;
  --purple-light: #ede9fe;
  --bg: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== Typography ===== */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 1.25rem;
}

.section-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 600px;
  line-height: 1.8;
}

/* ===== Layout ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 6rem 0; }
section.alt { background: var(--surface); }

/* ===== Navigation ===== */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#nav.scrolled {
  border-color: var(--border);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo { display: flex; align-items: center; }

.nav-logo-img {
  height: 44px;
  width: auto;
  max-width: 220px;
  display: block;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-links a:hover { color: var(--navy); background: var(--surface); }

.nav-links a.btn-contact {
  color: var(--white);
  background: var(--blue);
  padding: 0.5rem 1.1rem;
  margin-left: 0.5rem;
  border-radius: 8px;
  font-weight: 600;
}

.nav-links a.btn-contact:hover { background: #1d4ed8; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
  gap: 0.25rem;
}

.nav-mobile.open { display: flex; }

.nav-mobile a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  padding: 0.6rem 0.5rem;
  border-radius: 6px;
  transition: background var(--transition);
}

.nav-mobile a:hover { background: var(--surface); }

/* ===== Hero ===== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 4rem;
  background: linear-gradient(135deg, #eef3ff 0%, #f8faff 50%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(37,99,235,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-light);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-title .accent { color: var(--blue); }

.hero-sub {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.8rem 1.75rem;
  border-radius: 8px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
  flex-direction: column;
  gap: 0.1rem;
}

.btn-primary .btn-sub {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.85;
}

.btn-primary:hover {
  background: #1d4ed8;
  box-shadow: 0 6px 20px rgba(37,99,235,0.4);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--navy);
  background: var(--surface);
  transform: translateY(-1px);
}

/* ===== Dashboard Mockup ===== */
.hero-visual {
  position: relative;
}

.dashboard-card {
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.dashboard-header-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
}

.dashboard-header-menu {
  display: flex;
  flex-direction: column;
  gap: 3px;
  cursor: pointer;
}

.dashboard-header-menu span {
  display: block;
  width: 16px; height: 1.5px;
  background: var(--muted);
  border-radius: 2px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}

.dashboard-item {
  background: var(--white);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.dashboard-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dashboard-item h5 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--navy);
}

.dashboard-item p {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.4;
}

.d-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.d-icon.blue { background: #dbeafe; color: var(--blue); }
.d-icon.green { background: #d1fae5; color: var(--green); }
.d-icon.yellow { background: #fef3c7; color: #d97706; }
.d-icon.purple { background: #ede9fe; color: var(--purple); }

.dashboard-results {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0.9rem 1.2rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.result-item {
  flex: 1;
  text-align: center;
}

.result-item + .result-item {
  border-left: 1px solid var(--border);
}

.result-label {
  display: block;
  font-size: 0.68rem;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.result-value {
  display: block;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.result-value.neg { color: #ef4444; }
.result-value.pos { color: var(--green); }

/* ===== Stats Bar ===== */
#stats {
  padding: 2.5rem 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 160px;
}

.stat-icon {
  width: 44px; height: 44px;
  background: var(--blue-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  flex-shrink: 0;
}

.stat-text strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
}

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

/* ===== Services ===== */
.services-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.service-card-v2 {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}

.service-card-v2:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.service-card-icon-v2 {
  width: 64px; height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.service-card-icon-v2.blue { background: var(--blue-light); color: var(--blue); }
.service-card-icon-v2.green { background: var(--green-light); color: var(--green); }
.service-card-icon-v2.purple { background: var(--purple-light); color: var(--purple); }

.service-card-v2 h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.6rem;
}

.service-card-v2 > p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text);
}

.service-features li::before {
  content: '';
  width: 16px; height: 16px;
  background: var(--blue-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%232563eb' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ===== Mission ===== */
.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.mission-text p {
  color: var(--muted);
  line-height: 1.9;
  font-size: 0.975rem;
}

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

.mission-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.mission-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.mission-card-icon {
  width: 40px; height: 40px;
  background: var(--blue-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  color: var(--blue);
}

.mission-card h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.4rem;
}

.mission-card p {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ===== About ===== */
.about-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2.5rem;
  font-size: 0.9rem;
}

.about-table tr { border-bottom: 1px solid var(--border); }

.about-table td {
  padding: 1rem 1.25rem;
  vertical-align: top;
}

.about-table td:first-child {
  width: 220px;
  font-weight: 600;
  color: var(--navy);
  white-space: nowrap;
}

.about-table td span {
  display: block;
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 0.15rem;
}

.about-table td:last-child { color: var(--text); }

/* ===== CSI ===== */
.csi-intro {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.9;
  max-width: 760px;
  margin-bottom: 3rem;
}

.csi-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.csi-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.csi-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.6rem;
}

.csi-item p {
  font-size: 0.845rem;
  color: var(--muted);
  line-height: 1.75;
}

/* ===== Contact ===== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
  margin-top: 3rem;
}

.contact-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.contact-detail-icon {
  width: 36px; height: 36px;
  background: var(--blue-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--blue);
}

.contact-detail p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

.contact-detail strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.15rem;
}

.contact-form { display: flex; flex-direction: column; gap: 1rem; }

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

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--navy);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.7rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group textarea { resize: vertical; min-height: 130px; }

/* ===== Footer ===== */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.footer-brand p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-col h5 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 0.5rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.4); }

.footer-policy-link {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.footer-policy-link:hover { color: rgba(255,255,255,0.8); }

/* ===== Fade-in animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .services-grid-3 { grid-template-columns: 1fr 1fr; }
  .hero-grid { gap: 2rem; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .mission-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .mission-visual { grid-template-columns: 1fr 1fr; }
  .contact-wrap { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-table td:first-child { width: 160px; }
  .stats-grid { justify-content: flex-start; }
}

@media (max-width: 700px) {
  section { padding: 4rem 0; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .services-grid-3 { grid-template-columns: 1fr; }
  .mission-visual { grid-template-columns: 1fr; }
  .footer-links { flex-direction: column; gap: 1.5rem; }
  .form-row { grid-template-columns: 1fr; }
  .about-table td { padding: 0.8rem 0.75rem; }
  .about-table td:first-child { width: 130px; font-size: 0.82rem; }
  .csi-list { grid-template-columns: 1fr; }
  .stat-item { min-width: 140px; }
}