:root {
  --bg: #f6fbfb;
  --surface: #ffffff;
  --surface-alt: #eaf6f5;
  --text: #12221f;
  --text-soft: #33554f;
  --line: #c3ddd9;
  --brand: #008f7a;
  --brand-strong: #006c5d;
  --accent: #ff7a18;
  --shadow: 0 10px 30px rgba(0, 55, 49, 0.12);
  --radius: 16px;
  --radius-sm: 12px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, #e2f8f3 0%, transparent 46%),
    radial-gradient(circle at 80% 12%, #ffe6cf 0%, transparent 40%),
    var(--bg);
  line-height: 1.65;
  padding-bottom: env(safe-area-inset-bottom);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

ul {
  margin: 0;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.45rem;
}

.container {
  width: min(var(--container), calc(100% - 2.5rem));
  margin: 0 auto;
}

.section {
  padding: 5.5rem 0;
}

.surface {
  background: linear-gradient(180deg, rgba(0, 143, 122, 0.05), rgba(255, 255, 255, 0.85));
}

.section-title {
  font-size: clamp(1.8rem, 1.2rem + 2vw, 2.5rem);
  letter-spacing: 0.01em;
}

.section-lead {
  margin-top: 1rem;
  max-width: 70ch;
  color: var(--text-soft);
}

.eyebrow {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
  color: var(--brand-strong);
  text-transform: uppercase;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 0.6rem 0.9rem;
  border-radius: 8px;
}

.skip-link:focus {
  left: 0.8rem;
  top: 0.8rem;
  z-index: 2000;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1100;
  backdrop-filter: blur(8px);
  background: rgba(246, 251, 251, 0.82);
  border-bottom: 1px solid rgba(18, 34, 31, 0.08);
  padding-top: env(safe-area-inset-top);
}

.header-row {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  font-weight: 900;
}

.brand-mark {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 10px;
  display: inline-block;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 29, 55, 0.2);
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-text {
  font-size: 1.15rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-soft);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--brand-strong);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.45rem 0.8rem;
  font: inherit;
  font-size: 0.94rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 2px solid transparent;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.btn:focus-visible {
  outline: 3px solid rgba(255, 122, 24, 0.45);
  outline-offset: 2px;
}

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

.btn-small {
  padding: 0.55rem 0.9rem;
  font-size: 0.86rem;
  background: #fff;
  border-color: var(--line);
}

.btn-primary {
  padding: 0.82rem 1.35rem;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: #fff;
  box-shadow: 0 8px 16px rgba(0, 108, 93, 0.25);
}

.btn-ghost {
  padding: 0.82rem 1.35rem;
  border-color: var(--brand);
  color: var(--brand-strong);
  background: rgba(255, 255, 255, 0.8);
}

.hero {
  padding-top: 3.3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.1rem;
  align-items: center;
}

.hero-copy h1 {
  margin-top: 0.8rem;
  font-size: clamp(2rem, 1.2rem + 3vw, 3.6rem);
  letter-spacing: 0.01em;
}

.lead {
  margin-top: 1.2rem;
  max-width: 58ch;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.hero-actions {
  margin-top: 1.45rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.meta-line {
  margin-top: 1rem;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.hero-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.phone-card {
  background: linear-gradient(170deg, #ffffff, #f3fbfa);
  border: 1px solid rgba(0, 108, 93, 0.16);
  border-radius: 26px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.phone-card.alt {
  transform: translateY(1.1rem);
}

.phone-label {
  font-size: 0.8rem;
  color: var(--brand-strong);
  font-weight: 700;
}

.phone-caption {
  margin-top: 0.8rem;
  font-size: 0.84rem;
  color: var(--text-soft);
}

.mock-map {
  margin-top: 0.7rem;
  height: 165px;
  border-radius: 16px;
  background:
    linear-gradient(45deg, rgba(255, 122, 24, 0.25), rgba(0, 143, 122, 0.2)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.45) 0,
      rgba(255, 255, 255, 0.45) 1px,
      rgba(255, 255, 255, 0) 1px,
      rgba(255, 255, 255, 0) 19px
    );
}

.mock-list {
  margin-top: 0.7rem;
  height: 165px;
  border-radius: 16px;
  padding: 0.75rem;
  display: grid;
  gap: 0.55rem;
  background: rgba(0, 143, 122, 0.07);
}

.mock-list span {
  display: block;
  padding: 0.5rem 0.6rem;
  border-radius: 10px;
  background: #fff;
  border: 1px solid rgba(0, 108, 93, 0.14);
  font-size: 0.82rem;
}

.stat-row {
  margin-top: 1.6rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.stat {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 108, 93, 0.16);
  background: rgba(255, 255, 255, 0.86);
  padding: 0.85rem 0.95rem;
  text-align: center;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.stat strong {
  color: var(--text);
  font-size: 1.05rem;
}

.voice-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.voice-card {
  border: 1px solid rgba(0, 108, 93, 0.14);
  background: #fff;
  border-radius: var(--radius);
  padding: 1.15rem 1.15rem 1.2rem;
}

.voice-card h3 {
  font-size: 1.08rem;
}

.voice-card p {
  margin-top: 0.7rem;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.feature-grid {
  margin-top: 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid rgba(18, 34, 31, 0.09);
  padding: 1.15rem;
}

.feature-card h3 {
  font-size: 1.02rem;
}

.feature-card p {
  margin-top: 0.52rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.steps {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.step {
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid rgba(0, 108, 93, 0.14);
  padding: 1.2rem;
}

.step-num {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: #073f37;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.step h3 {
  margin-top: 0.7rem;
  font-size: 1rem;
}

.step p {
  margin-top: 0.45rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.faq-list {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.75rem;
}

details {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(18, 34, 31, 0.15);
  background: #fff;
  padding: 0.75rem 0.9rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin-top: 0.62rem;
  color: var(--text-soft);
}

.cta-section {
  padding-top: 2rem;
}

.cta-panel {
  border-radius: 26px;
  border: 1px solid rgba(0, 108, 93, 0.16);
  padding: 2rem;
  background:
    radial-gradient(circle at 90% 20%, rgba(255, 122, 24, 0.2), transparent 44%),
    linear-gradient(120deg, #ffffff, #edf9f7);
}

.cta-panel h2 {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.2rem);
}

.cta-panel p {
  margin-top: 0.6rem;
  color: var(--text-soft);
}

.site-footer {
  border-top: 1px solid rgba(18, 34, 31, 0.11);
  padding: 1.2rem 0 1.6rem;
  background: rgba(255, 255, 255, 0.7);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.legal-note {
  margin-top: 0.55rem;
  font-size: 0.8rem;
  color: #54706a;
}

.manual-title {
  margin-top: 0.7rem;
  font-size: clamp(2rem, 1.4rem + 2.5vw, 3rem);
}

.manual-intro {
  margin-top: 1rem;
  color: var(--text-soft);
  max-width: 70ch;
}

.manual-layout {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 270px 1fr;
  gap: 1.4rem;
  align-items: start;
}

.toc {
  position: sticky;
  top: 95px;
  border-radius: var(--radius);
  border: 1px solid rgba(0, 108, 93, 0.16);
  background: rgba(255, 255, 255, 0.92);
  padding: 1rem;
  display: grid;
  gap: 0.55rem;
}

.toc h2 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.toc a {
  font-size: 0.91rem;
  text-decoration: none;
  color: var(--text-soft);
}

.toc a:hover,
.toc a:focus-visible {
  color: var(--brand-strong);
}

.manual-content {
  display: grid;
  gap: 1rem;
}

.manual-section {
  border-radius: var(--radius);
  border: 1px solid rgba(18, 34, 31, 0.12);
  background: rgba(255, 255, 255, 0.9);
  padding: 1.2rem;
  scroll-margin-top: 100px;
}

.manual-section h2 {
  font-size: 1.35rem;
}

.manual-section p {
  margin-top: 0.55rem;
  color: var(--text-soft);
}

.manual-section ul {
  margin-top: 0.8rem;
}

.manual-mock {
  margin-top: 0.9rem;
}

.mock-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-strong);
}

.mock-screen {
  margin-top: 0.45rem;
  border-radius: 14px;
  border: 1px dashed rgba(0, 108, 93, 0.35);
  background: linear-gradient(145deg, #f4fcfb, #e7f8f5);
  min-height: 120px;
  padding: 0.8rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.mock-screen span {
  border-radius: 10px;
  background: #fff;
  border: 1px solid rgba(18, 34, 31, 0.1);
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  color: var(--text-soft);
  padding: 0.45rem 0.3rem;
  text-align: center;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .hero-grid,
  .feature-grid,
  .voice-grid,
  .steps,
  .manual-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .hero-visual {
    grid-template-columns: 1fr;
  }

  .phone-card.alt {
    transform: none;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(var(--container), calc(100% - 1.5rem));
  }

  .section {
    padding: 4.4rem 0;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    right: 0.75rem;
    top: calc(100% + 8px);
    min-width: 230px;
    background: #fff;
    border: 1px solid rgba(18, 34, 31, 0.11);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 0.85rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav .btn-small {
    margin-top: 0.4rem;
    text-align: center;
  }

  .manual-section {
    scroll-margin-top: 80px;
  }

  .mock-screen {
    grid-template-columns: 1fr;
  }
}