:root {
  --ink: #171717;
  --muted: #5f6368;
  --line: #dedad3;
  --paper: #fbfaf7;
  --white: #ffffff;
  --accent: #c74428;
  --accent-dark: #8f2d1c;
  --green: #1f6b55;
  --blue: #315f8f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 56px);
  color: var(--white);
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 11px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
}

.brand-ring,
.brand-core,
.brand-dot {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-ring {
  stroke-width: 2.3;
}

.brand-core {
  fill: currentColor;
  stroke-width: 0;
}

.brand-dot {
  fill: var(--accent);
  stroke-width: 0;
}

.nav-links {
  gap: clamp(14px, 2.6vw, 30px);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
}

.hero {
  position: relative;
  min-height: 82vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 110px clamp(20px, 6vw, 88px) 72px;
  color: var(--white);
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.76), rgba(0, 0, 0, 0.46) 44%, rgba(0, 0, 0, 0.18)),
    linear-gradient(180deg, rgba(0, 0, 0, 0.52), rgba(0, 0, 0, 0.08) 34%, rgba(0, 0, 0, 0.36));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffb39f;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 12em;
  font-size: clamp(42px, 7.4vw, 92px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin: 10px 0 8px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-copy {
  width: min(640px, 100%);
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(16px, 2vw, 20px);
}

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

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 800;
  text-decoration: none;
}

.button-primary {
  background: var(--accent);
  color: var(--white);
}

.button-primary:hover {
  background: var(--accent-dark);
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.62);
  color: var(--white);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.section {
  border-top: 1px solid var(--line);
  padding: clamp(54px, 8vw, 94px) clamp(20px, 6vw, 88px);
}

.section-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.intro-section {
  background: var(--white);
}

.intro-grid,
.split-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(280px, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: start;
}

.intro-grid p,
.split-section p,
.contact-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

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

.pillar {
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 24px;
}

.pillar-number {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.pillar p {
  margin: 0;
  color: var(--muted);
}

.about-us-section {
  background: var(--white);
}

.about-us-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(280px, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: start;
}

.about-us-copy {
  display: grid;
  gap: 16px;
}

.about-us-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.solutions-section {
  background: var(--paper);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.solution-card {
  min-height: 230px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 26px;
}

.solution-card-soon {
  background: #f7fbf8;
}

.solution-label {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.solution-card p:not(.solution-label) {
  margin: 0;
  color: var(--muted);
}

.use-case-section {
  background: #eef3f0;
}

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

.use-case-list li {
  border-left: 4px solid var(--green);
  background: var(--white);
  padding: 15px 18px;
  font-weight: 800;
}

.contact-section {
  background: var(--ink);
  color: var(--white);
}

.contact-inner {
  display: grid;
  gap: 18px;
  justify-items: start;
  text-align: left;
}

.contact-inner p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.74);
}

@media (max-width: 820px) {
  .site-header {
    padding: 16px 20px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 78vh;
    padding: 96px 20px 48px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0.48)),
      linear-gradient(180deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.28));
  }

  .intro-grid,
  .split-section,
  .about-us-grid,
  .solution-grid,
  .pillar-grid {
    grid-template-columns: 1fr;
  }

  .pillar {
    min-height: 0;
  }
}