:root {
  --bg: #0b0b0d;
  --bg-soft: #131318;
  --text: #f4f4f6;
  --text-soft: rgba(244, 244, 246, 0.78);
  --text-faint: rgba(244, 244, 246, 0.66);
  --primary: #e11d2e;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.16);
  --radius-lg: 28px;
  --radius-md: 18px;
  --shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-weight: 400;
  line-height: 1.7;
  background:
    radial-gradient(circle at 90% -10%, rgba(225, 29, 46, 0.22), transparent 36%),
    radial-gradient(circle at 10% 10%, rgba(225, 29, 46, 0.14), transparent 28%),
    var(--bg);
}

a {
  color: inherit;
}

p {
  margin: 0;
  color: var(--text-soft);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
}

h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

h3 {
  color: var(--primary);
  font-size: clamp(1.05rem, 2vw, 1.26rem);
  font-weight: 700;
}

h3.plain {
  color: var(--text);
}

h4 {
  font-size: 1rem;
  font-weight: 700;
}

ul {
  margin: 12px 0 0;
  padding-left: 1.15rem;
}

li {
  margin-bottom: 6px;
  color: var(--text-soft);
}

.container {
  width: min(1100px, calc(100vw - 48px));
  margin: 0 auto;
}

.card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  padding: 18px;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(11, 11, 13, 0.62);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 64px;
}

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

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 18px rgba(225, 29, 46, 0.35);
}

.brand-name {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.desktop-nav {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.desktop-nav a {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.86);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 999px;
  transition: background-color 0.2s ease;
}

.desktop-nav a:not(.button):hover {
  background: rgba(255, 255, 255, 0.08);
}

.mobile-nav {
  display: none;
  margin-left: auto;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(19, 19, 24, 0.55);
  overflow: hidden;
}

.mobile-nav summary {
  list-style: none;
  cursor: pointer;
  padding: 9px 14px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.86);
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 8px 8px;
}

.mobile-nav nav a {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.88);
  border-radius: 10px;
  padding: 8px 10px;
}

.mobile-nav nav a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.hero-shell {
  padding: 46px 0 0;
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: clamp(24px, 5vw, 48px);
  background: rgba(0, 0, 0, 0.55);
}

.hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: min(55vw, 520px);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(225, 29, 46, 0.4), rgba(225, 29, 46, 0));
  pointer-events: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-bottom: 16px;
  border-radius: 999px;
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(19, 19, 24, 0.65);
  border: 1px solid var(--line-strong);
}

.hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.75rem, 5.3vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.hero-text {
  position: relative;
  z-index: 1;
  font-size: clamp(0.94rem, 1.1vw, 1rem);
  max-width: 850px;
}

.hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  transition: transform 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

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

.button-secondary {
  color: #111;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.22);
}

.section-shell {
  padding-top: 80px;
}

.section-bottom {
  padding-bottom: 64px;
}

.feature-list {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

.feature-row {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: start;
}

.feature-icon,
.info-icon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--primary);
  background: rgba(225, 29, 46, 0.14);
  border: 1px solid rgba(225, 29, 46, 0.22);
  font-size: 0.82rem;
  font-weight: 700;
}

.feature-row p {
  margin-top: 4px;
}

.service-card + .service-card {
  margin-top: 18px;
}

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

.info-card {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(19, 19, 24, 0.92);
  padding: 16px;
}

.info-title {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
  margin-bottom: 3px;
}

.info-value {
  color: var(--text);
  font-weight: 600;
  word-break: break-word;
}

.info-value a {
  color: var(--text);
  text-underline-offset: 3px;
}

.contact-highlight {
  margin-top: 12px;
  color: var(--primary);
  font-weight: 600;
}

.contact-grid {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.contact-tile {
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(19, 19, 24, 0.85);
  padding: 14px;
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}

footer p {
  color: var(--text-faint);
  text-align: center;
}

@media (max-width: 979px) {
  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: block;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(1100px, calc(100vw - 28px));
  }

  .hero-shell {
    padding-top: 26px;
  }

  .section-shell {
    padding-top: 62px;
  }

  .button {
    width: 100%;
  }

  .hero-actions {
    gap: 10px;
  }
}