@charset "UTF-8";

:root {
  --bg: #f5fbff;
  --bg-soft: #ffffff;
  --panel: #ffffff;
  --panel-strong: #ffffff;
  --line: #d7e8f1;
  --text: #17384c;
  --muted: #5a7688;
  --primary: #2683b8;
  --primary-deep: #1d678f;
  --accent: #d8edf7;
  --shadow: 0 6px 18px rgba(17, 96, 128, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 82px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.96rem;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a:hover {
  background: var(--accent);
  color: var(--primary-deep);
}

.section-kicker {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-title {
  margin: 0 0 16px;
  font-size: clamp(1.9rem, 2vw + 1rem, 2.8rem);
  line-height: 1.15;
}

.section-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.site-footer {
  padding: 28px 0 36px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.footer-copy,
.footer-note {
  margin: 0;
  color: var(--muted);
}