:root {
  color-scheme: light;
  --page: #f7fbfd;
  --paper: #ffffff;
  --soft-blue: #e7f4fa;
  --line: #d8e6ec;
  --ink: #18272e;
  --muted: #62727a;
  --accent: #b86938;
  --accent-soft: #faeee7;
  --green-soft: #e8f4ee;
  --shadow: 0 22px 50px rgba(46, 87, 103, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(231, 244, 250, 0.8), rgba(247, 251, 253, 0.15) 360px),
    var(--page);
  color: var(--ink);
  font-family: "Yu Gothic", "YuGothic", "Hiragino Sans", "Meiryo", system-ui, sans-serif;
  line-height: 1.8;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

.site-header {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.site-nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero {
  width: min(1120px, calc(100% - 40px));
  margin: 20px auto 0;
  min-height: 74vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 480px);
  gap: 54px;
  align-items: center;
  padding: 38px 0 70px;
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 20px;
  font-size: 3.8rem;
  line-height: 1.14;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 22px;
  font-size: 2rem;
  line-height: 1.45;
  letter-spacing: 0;
}

.hero-lead {
  margin-bottom: 24px;
  font-size: 2.2rem;
  line-height: 1.55;
  font-weight: 700;
}

.hero-text,
.section-body p {
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 10px 18px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.hero-media {
  display: grid;
  gap: 16px;
}

.hero-card {
  aspect-ratio: 1 / 1;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--paper);
}

.mini-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mini-steps img {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 42px;
}

.concept h2 {
  max-width: 680px;
}

.flow-list,
.sense-list,
.action-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(92px, 1fr));
  gap: 12px;
  align-items: stretch;
}

.flow-list li {
  position: relative;
  min-height: 74px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  font-weight: 700;
  text-align: center;
}

.flow-list li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -11px;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--line);
}

.sense-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.sense-list li,
.action-list li {
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  padding: 16px 18px;
}

.action-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 42px;
  align-items: start;
}

.action-list {
  display: grid;
  gap: 12px;
}

.action-list li {
  background: var(--green-soft);
  border-left-color: #6a9c83;
  font-weight: 700;
}

.why-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 42px;
  align-items: start;
  max-width: 880px;
}

.why-note {
  margin: 8px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--accent);
  color: var(--ink);
  font-weight: 700;
}

.site-footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 44px 0 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 22px 0 0;
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 18px 0 56px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 1.62rem;
  }

  .hero-lead {
    font-size: 1.82rem;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 54px 0;
  }

  .flow-list,
  .sense-list,
  .action-grid,
  .why-body {
    grid-template-columns: 1fr;
  }

  .flow-list li:not(:last-child)::after {
    right: auto;
    left: 50%;
    top: auto;
    bottom: -12px;
    width: 1px;
    height: 12px;
  }
}

@media (max-width: 520px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    padding-top: 18px;
  }

  .site-nav,
  .site-footer nav {
    gap: 10px 16px;
  }

  .hero {
    gap: 24px;
    padding-bottom: 16px;
  }

  .section {
    padding: 32px 0 48px;
  }

  h1 {
    font-size: 2.48rem;
  }

  h2 {
    font-size: 1.38rem;
  }

  .hero-lead {
    font-size: 1.55rem;
  }

  .button {
    width: 100%;
  }

  .hero-media {
    width: min(100%, 176px);
    justify-self: center;
  }

  .hero-card {
    box-shadow: 0 14px 28px rgba(46, 87, 103, 0.1);
  }

  .mini-steps {
    display: none;
  }
}