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

:root {
  --color-primary: #1a1a2e;
  --color-accent: #4a90d9;
  --color-accent-hover: #357abd;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #e0e0e0;
  --color-line: #06c755;
  --font: 'Noto Sans JP', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  line-height: 1.8;
  background: var(--color-bg);
}

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

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-list a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-list a:hover {
  color: var(--color-accent);
}

.btn-nav {
  background: var(--color-accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 6px;
  transition: background 0.2s;
}

.btn-nav:hover {
  background: var(--color-accent-hover);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: 0.2s;
}

/* ── Hero ── */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  background: linear-gradient(135deg, #f0f4f8 0%, #e8edf2 100%);
}

.hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 14px 40px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
}

/* ── Sections ── */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--color-primary);
}

.section h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-accent);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ── Company Info Table ── */
.info-table {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  border-collapse: collapse;
}

.info-table tr {
  border-bottom: 1px solid var(--color-border);
}

.info-table th,
.info-table td {
  padding: 16px 12px;
  text-align: left;
  font-size: 0.95rem;
}

.info-table th {
  width: 140px;
  color: var(--color-text-light);
  font-weight: 400;
  white-space: nowrap;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.card-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.card-coming {
  border-style: dashed;
  opacity: 0.6;
}

/* ── Features ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature {
  text-align: center;
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.feature h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.feature p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ── Contact ── */
.section-contact {
  text-align: center;
  background: var(--color-primary);
  color: #fff;
}

.section-contact h2 {
  color: #fff;
}

.section-contact h2::after {
  background: var(--color-line);
}

.section-contact p {
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.8);
}

.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-line);
  color: #fff;
  padding: 16px 40px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-line:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-line svg {
  flex-shrink: 0;
}

/* ── Footer ── */
.footer {
  background: #111;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  padding: 24px 0;
  font-size: 0.8rem;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .hero {
    padding: 120px 0 64px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .nav-list.open {
    display: flex;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .section {
    padding: 56px 0;
  }

  .section h2 {
    margin-bottom: 32px;
  }
}