:root {
  --main-blue: #1f3c88;
  --dark-blue: #102246;
  --light-blue: #e6eefc;
  --gray: #f5f5f5;
  --text-main: #333;
  --text-muted: #666;
  --max-width: 1100px;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background-color: #ffffff;
  line-height: 1.7;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

section {
  padding: 64px 0;
}

h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--dark-blue);
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 24px;
  border-left: 5px solid var(--main-blue);
  padding-left: 12px;
}

h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

p {
  margin-bottom: 10px;
}

/* ヘッダー・ナビ */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-weight: 700;
  color: var(--main-blue);
  font-size: 1.1rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 16px;
  font-size: 0.95rem;
}

nav a {
  padding: 6px 8px;
  border-radius: 4px;
  transition: background-color 0.15s ease;
}

nav a:hover {
  background-color: var(--light-blue);
}

/* ハンバーガーメニュー */

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle-label span {
  width: 22px;
  height: 2px;
  background-color: var(--dark-blue);
  display: block;
}

@media (max-width: 768px) {
  nav ul {
    position: absolute;
    top: 60px;
    right: 0;
    background-color: #ffffff;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
    border-bottom-left-radius: 8px;
    border-left: 1px solid #eee;
    border-bottom: 1px solid #eee;
    display: none;
  }
  .nav-toggle:checked + .nav-toggle-label + nav ul {
    display: flex;
  }
  .nav-toggle-label {
    display: flex;
  }
}

/* ヒーロー */

.hero {
  background: radial-gradient(circle at top left, #e0ebff 0, #ffffff 50%, #f3f6ff 100%);
  padding: 72px 0 64px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.hero-title {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--dark-blue);
}

.hero-subtitle {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
  min-width: 160px;
}

.btn-primary {
  background-color: var(--main-blue);
  color: #fff;
  border-color: var(--main-blue);
}

.btn-outline {
  background-color: #ffffff;
  color: var(--main-blue);
  border-color: var(--main-blue);
}

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

.hero-visual {
  background: linear-gradient(135deg, var(--light-blue), #ffffff);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid #dde5ff;
}

.hero-visual-box {
  border-radius: 12px;
  border: 1px dashed #c3cff5;
  padding: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
}

/* カード */

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 1024px) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: #ffffff;
  border-radius: 12px;
  border: 1px solid #e5e9f5;
  padding: 16px 18px;
  box-shadow: 0 4px 10px rgba(15, 32, 87, 0.03);
  font-size: 0.9rem;
}

.card-title {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark-blue);
}

/* 汎用 */

.section-intro {
  max-width: 760px;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.two-column {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr;
  gap: 32px;
  align-items: flex-start;
}

@media (max-width: 900px) {
  .two-column {
    grid-template-columns: 1fr;
  }
}

table.company-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background-color: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e3e7f0;
}

.company-table th,
.company-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #edf0f7;
  vertical-align: top;
}

.company-table th {
  width: 30%;
  background-color: #f7f8fc;
  text-align: left;
  font-weight: 600;
  color: var(--dark-blue);
}

.company-table tr:last-child th,
.company-table tr:last-child td {
  border-bottom: none;
}

ul {
  padding-left: 1.2em;
  margin-bottom: 10px;
}

li {
  margin-bottom: 4px;
}

.bg-gray {
  background-color: var(--gray);
}

.bg-light-blue {
  background-color: #f3f6ff;
}

.small {
  font-size: 0.85rem;
}

/* フッター */

footer {
  background-color: var(--dark-blue);
  color: #ffffff;
  padding: 24px 0;
  margin-top: 40px;
  font-size: 0.85rem;
}

footer a {
  color: #ffffff;
  opacity: 0.85;
}

footer a:hover {
  opacity: 1;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}

.footer-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* submenu */
nav li { position: relative; }
.submenu { display:none; position:absolute; top:100%; left:0; background:#fff; border:1px solid #e0e0e0; border-radius:8px; box-shadow:0 8px 16px rgba(0,0,0,0.06); min-width:220px; padding:8px 0; z-index:200; }
.submenu a { display:block; padding:8px 12px; font-size:0.9rem; }
.submenu a:hover { background-color: var(--light-blue); }
.has-submenu:hover > .submenu { display:block; }
@media (max-width:768px){ .submenu{position:static; box-shadow:none; border:none; padding-left:8px;} }


.hero-top-image {
  width: 100%;
  margin: 0 auto 32px;
}

.hero-top-image img {
  width: 100%;
  max-width: var(--max-width);
  display: block;
  margin: 0 auto;
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}