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

:root {
  --black: #111111;
  --white: #ffffff;
  --gray-light: #f5f5f5;
  --gray-mid: #888888;
  --accent: #c8960c;
  --font: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--black);
  line-height: 1.7;
  font-size: 16px;
}

.inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
header {
  position: sticky;
  top: 0;
  background: var(--black);
  z-index: 100;
  padding: 16px 0;
}

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

.logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--white);
}

nav {
  display: flex;
  gap: 28px;
}

nav a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--white);
}

/* ===== Hero ===== */
.hero {
  background: var(--black);
  color: var(--white);
  padding: 100px 0 90px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.3;
  margin-bottom: 24px;
}

.hero p {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  line-height: 1.9;
}

/* ===== Section ===== */
.section {
  padding: 80px 0;
}

.section.alt {
  background: var(--gray-light);
}

.section h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 14px;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--accent);
}

/* ===== Info Table ===== */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.info-table th,
.info-table td {
  padding: 14px 16px;
  border-bottom: 1px solid #e0e0e0;
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 160px;
  color: var(--gray-mid);
  font-weight: 500;
  white-space: nowrap;
}

/* ===== Cards ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--white);
  border-radius: 8px;
  padding: 28px 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 14px;
  color: #444;
  line-height: 1.8;
}

/* ===== Timeline ===== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: #ddd;
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ddd;
  border: 2px solid var(--white);
}

.timeline-item.active .timeline-dot {
  background: var(--accent);
}

.timeline-date {
  display: inline-block;
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

.timeline-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: #444;
  line-height: 1.8;
}

/* ===== Contact ===== */
.contact-inner {
  text-align: center;
}

.contact-inner p {
  font-size: 15px;
  color: #555;
  margin-bottom: 32px;
}

.contact-box {
  display: inline-block;
  background: var(--white);
  border-radius: 8px;
  padding: 28px 40px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  text-align: left;
}

.contact-box p {
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 500;
  color: var(--black);
}

.contact-box p:last-child {
  margin-bottom: 0;
}

/* ===== Footer ===== */
footer {
  background: var(--black);
  color: rgba(255,255,255,0.5);
  padding: 28px 0;
  font-size: 13px;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 680px) {
  nav {
    display: none;
  }

  .hero {
    padding: 64px 0 60px;
  }

  .hero p {
    font-size: 14px;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .info-table th {
    width: 100px;
    font-size: 14px;
  }

  .info-table td {
    font-size: 14px;
  }
}