:root {
  --color-primary: #90b0a0;
  --color-primary-dark: #5f7f71;
  --color-primary-pale: #e8f0ec;
  --color-secondary: #d8b0a3;
  --color-secondary-light: #e0b8a8;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f5f2;
  --color-text: #333333;
  --color-text-muted: #666666;
  --color-border: #efefea;
  --color-photo-warm: #c9a28c;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 48px rgba(74, 91, 83, 0.08);
  --font-base: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", sans-serif;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0.03em;
  word-break: normal;
  overflow-wrap: anywhere;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(16px, 4vw, 40px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 36px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-pill);
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 700;
}

.brand-mark::after {
  position: absolute;
  right: -3px;
  bottom: 3px;
  width: 10px;
  height: 10px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--color-secondary);
  content: "";
}

.brand-text {
  color: var(--color-text);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 600;
}

.site-nav a {
  min-height: 44px;
  padding: 12px 14px;
  border-radius: var(--radius-pill);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-primary-dark);
  background: var(--color-primary-pale);
  outline: none;
}

.section {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
  padding: 80px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  align-items: center;
  gap: 56px;
  min-height: 720px;
  padding-top: 64px;
  padding-bottom: 64px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(30px, 4.6vw, 40px);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.02em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 600;
  line-height: 1.55;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.6;
}

.lead {
  margin-bottom: 32px;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--color-primary-dark);
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.button-primary {
  background: var(--color-primary-dark);
  color: #ffffff;
}

.button-secondary {
  background: #ffffff;
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #4f6f62;
  border-color: #4f6f62;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: var(--color-primary-pale);
}

.hero-media {
  margin: 0;
  padding: 20px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.hero-media img {
  width: 100%;
  border-radius: var(--radius-md);
}

.intro {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.intro p:last-child,
.split-copy p,
.contact-box p,
.article-card p,
.card p,
.steps p,
.site-footer p {
  color: var(--color-text-muted);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

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

.card,
.article-card,
.contact-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-soft);
}

.card-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 32px;
  margin-bottom: 24px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 48px;
  align-items: start;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 18px 20px 18px 52px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 600;
}

.check-list li::before {
  position: absolute;
  top: 18px;
  left: 20px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  color: #ffffff;
  content: "✓";
  font-size: 12px;
  line-height: 20px;
  text-align: center;
}

.support {
  width: 100%;
  max-width: none;
  padding-right: max(16px, calc((100vw - var(--container)) / 2));
  padding-left: max(16px, calc((100vw - var(--container)) / 2));
  background: var(--color-bg-soft);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.support-item {
  display: grid;
  gap: 8px;
  min-height: 160px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.support-item span {
  color: var(--color-primary-dark);
  font-size: 18px;
  font-weight: 600;
}

.support-item small {
  color: var(--color-text-muted);
  font-size: 13px;
  line-height: 1.8;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.steps span,
.article-category {
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 700;
}

.steps strong {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
}

.article-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-primary-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.text-link::after {
  margin-left: 8px;
  content: "→";
}

.contact {
  padding-top: 40px;
}

.contact-box {
  text-align: center;
}

.contact-box .hero-actions {
  justify-content: center;
}

.site-footer {
  display: grid;
  gap: 8px;
  padding: 40px clamp(16px, 4vw, 40px);
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero,
  .intro,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 32px;
    min-height: auto;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .card-grid,
  .support-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .article-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    width: min(100% - 24px, var(--container));
    padding: 56px 0;
  }

  .brand-text {
    font-size: 15px;
  }

  .site-nav a {
    white-space: nowrap;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .hero-media {
    padding: 12px;
    border-radius: var(--radius-lg);
  }

  .hero-media img {
    border-radius: var(--radius-md);
  }

  .card,
  .article-card,
  .contact-box,
  .support-item,
  .steps li {
    padding: 24px;
    border-radius: var(--radius-md);
  }
}