:root {
  color-scheme: light;
  --ink: #202421;
  --muted: #68716d;
  --line: #d9dfdb;
  --paper: #fbfcfa;
  --soft: #eef4ef;
  --accent: #2f6f5e;
  --accent-dark: #224d43;
  --warm: #c94f3d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, sans-serif;
  line-height: 1.8;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(251, 252, 250, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.logo {
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav a,
.site-footer a {
  text-decoration: none;
}

.nav a:hover,
.site-footer a:hover,
.article-list a:hover,
.sitemap a:hover {
  color: var(--accent);
}

.hero {
  position: relative;
  min-height: min(720px, calc(100vh - 40px));
  display: grid;
  align-items: center;
  padding: clamp(48px, 9vw, 104px) clamp(20px, 7vw, 92px);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(251, 252, 250, 0.92) 0%, rgba(251, 252, 250, 0.78) 38%, rgba(251, 252, 250, 0.16) 70%);
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--warm);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.35;
  letter-spacing: 0;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2.1rem, 6vw, 4.9rem);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
}

h3 {
  margin: 10px 0 10px;
  font-size: 1.15rem;
}

.hero-copy p:not(.eyebrow) {
  max-width: 520px;
  color: #38413d;
  font-size: 1.05rem;
}

.button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button:hover,
.contact-form button:hover {
  background: var(--accent-dark);
}

.secondary-button {
  color: var(--accent-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.secondary-button:hover {
  color: #fff;
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.content-band,
.split-section,
.notice,
.page,
.article-page {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.content-band {
  padding: 72px 0;
}

.section-heading {
  margin-bottom: 26px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  min-height: 260px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.article-card a {
  display: block;
  height: 100%;
  padding: 24px;
  text-decoration: none;
}

.article-card p,
.article-list p,
.page-heading p,
.lead,
.small-note {
  color: var(--muted);
}

.category {
  display: inline-flex;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 70px);
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.policy-list {
  display: grid;
  gap: 14px;
}

.policy-list p,
.summary-box {
  margin: 0;
  padding: 18px;
  background: var(--soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
}

.notice {
  margin-bottom: 72px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.page,
.article-page {
  padding: 64px 0 80px;
}

.narrow,
.article-page {
  max-width: 780px;
}

.page-heading {
  margin-bottom: 36px;
}

.page-heading h1,
.article-page h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
}

.article-list {
  display: grid;
  gap: 22px;
}

.article-list article {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.article-list h2 {
  margin: 8px 0 10px;
  font-size: 1.45rem;
}

.article-list a {
  text-decoration: none;
}

.article-page h2 {
  margin-top: 38px;
  font-size: 1.45rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-dark);
}

.lead {
  font-size: 1.05rem;
}

.summary-box {
  margin-top: 38px;
}

.summary-box h2 {
  margin-top: 0;
}

.calculator {
  margin: 34px 0 42px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.calculator-heading h2 {
  margin-bottom: 10px;
}

.calculator-heading p:not(.eyebrow) {
  margin-top: 0;
  color: var(--muted);
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.calculator label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

.calculator input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

.calculator-result {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.calculator-result div {
  padding: 18px;
  background: var(--soft);
  border-radius: 8px;
}

.calculator-result span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.calculator-result strong {
  display: block;
  margin-top: 6px;
  color: var(--accent-dark);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  line-height: 1.3;
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.info-list {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px 22px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.info-list dt {
  font-weight: 800;
}

.info-list dd {
  margin: 0;
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.small-note {
  font-size: 0.9rem;
}

.sitemap {
  display: grid;
  gap: 12px;
  padding-left: 22px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(18px, 4vw, 56px);
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 820px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: 620px;
    padding-top: 86px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(251, 252, 250, 0.92) 0%, rgba(251, 252, 250, 0.8) 46%, rgba(251, 252, 250, 0.28) 100%);
  }

  .article-grid,
  .split-section,
  .calculator-grid,
  .calculator-result {
    grid-template-columns: 1fr;
  }

  .info-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .nav,
  .site-footer nav {
    gap: 10px 14px;
    font-size: 0.88rem;
  }

  .content-band,
  .split-section,
  .notice,
  .page,
  .article-page {
    width: min(100% - 28px, 1120px);
  }

  .article-card a,
  .notice,
  .contact-form,
  .info-list {
    padding: 18px;
  }
}