:root {
  --primary: #0c4a6e;
  --primary-light: #0369a1;
  --accent: #d97706;
  --accent-soft: #fef3c7;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #e2e8f0;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --radius: 16px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 17px; color: var(--primary); }
.logo-text small { font-size: 10px; color: var(--text-muted); letter-spacing: 0.8px; }

.nav { display: flex; gap: 28px; }
.nav a {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}
.nav a:hover { color: var(--primary-light); text-decoration: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(217, 119, 6, 0.12), transparent 35%),
    radial-gradient(circle at 80% 10%, rgba(3, 105, 161, 0.15), transparent 40%),
    linear-gradient(160deg, #f0f9ff 0%, #fff 45%, #fffbeb 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(12, 74, 110, 0.08);
}

.hero-content { position: relative; z-index: 1; max-width: 760px; }

.hero-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.15;
  color: var(--primary);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 12px 30px rgba(3, 105, 161, 0.25);
}
.btn-outline {
  border: 1px solid var(--border);
  color: var(--primary);
  background: rgba(255, 255, 255, 0.8);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 520px;
}
.hero-stats div {
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
}
.hero-stats strong {
  display: block;
  font-size: 22px;
  color: var(--primary);
}
.hero-stats span { font-size: 13px; color: var(--text-muted); }

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  color: var(--primary);
  margin-bottom: 12px;
}
.section-head p { color: var(--text-muted); }

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.about-card {
  padding: 32px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.about-card.highlight {
  background: linear-gradient(160deg, #0c4a6e, #0369a1);
  color: #e2e8f0;
  border: none;
}
.about-card h3 { font-size: 22px; margin-bottom: 16px; }
.about-card p + p { margin-top: 14px; }

.info-list { list-style: none; }
.info-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
}
.info-list li:last-child { border-bottom: none; }
.info-list span { opacity: 0.75; white-space: nowrap; }
.info-list em { font-style: normal; text-align: right; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.service-card {
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  transition: transform 0.25s, box-shadow 0.25s;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 18px;
}
.service-card h3 { font-size: 20px; margin-bottom: 12px; color: var(--primary); }
.service-card p { color: var(--text-muted); font-size: 15px; }

.philosophy-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.philosophy-text h2 {
  font-size: clamp(28px, 4vw, 38px);
  color: var(--primary);
  margin: 12px 0 20px;
}

blockquote {
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 24px;
}

.philosophy-list { list-style: none; }
.philosophy-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text-muted);
}
.philosophy-list li:last-child { border-bottom: none; }
.philosophy-list strong { color: var(--text); }

.philosophy-visual { display: grid; place-items: center; }

.orbit {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 1px dashed rgba(12, 74, 110, 0.2);
  display: grid;
  place-items: center;
  animation: spin 30s linear infinite;
}

.orbit-center {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: grid;
  place-items: center;
  text-align: center;
  font-weight: 700;
  line-height: 1.3;
  animation: spin 30s linear infinite reverse;
}

.orbit span {
  position: absolute;
  padding: 8px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  box-shadow: var(--shadow);
}
.orbit span:nth-child(2) { top: 8px; left: 50%; transform: translateX(-50%); }
.orbit span:nth-child(3) { right: -8px; top: 50%; transform: translateY(-50%); }
.orbit span:nth-child(4) { bottom: 8px; left: 50%; transform: translateX(-50%); }
.orbit span:nth-child(5) { left: -8px; top: 50%; transform: translateY(-50%); }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.contact-card {
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
}
.contact-card h3 {
  color: var(--primary);
  margin-bottom: 12px;
  font-size: 18px;
}
.contact-card p { color: var(--text-muted); }
.contact-card small { color: #94a3b8; }

.contact-note {
  text-align: center;
  font-size: 13px;
  color: #94a3b8;
}

.footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer strong { color: #fff; font-size: 18px; }
.footer-meta { text-align: right; font-size: 13px; }
.footer a { color: #94a3b8; }

@media (max-width: 900px) {
  .about-grid,
  .service-grid,
  .philosophy-wrap,
  .contact-grid,
  .hero-stats { grid-template-columns: 1fr; }

  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: 72px 0 auto;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: 0.25s;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .footer-meta { text-align: left; }
}