:root {
  --kc-ink: #172224;
  --kc-muted: #5f6c6f;
  --kc-soft: #f5f8f8;
  --kc-line: #dfe8e8;
  --kc-teal: #0f9f9a;
  --kc-teal-dark: #087b78;
  --kc-surface: #ffffff;
  --kc-charcoal: #20282b;
  --kc-shadow: 0 24px 70px rgba(22, 40, 42, 0.14);
}

body {
  background: var(--kc-surface);
  color: var(--kc-ink);
  font-family: "SF Pro Display", "Inter", "Noto Sans JP", system-ui, sans-serif;
}

body p {
  color: var(--kc-muted);
}

.container {
  width: min(92%, 1160px);
  margin-inline: auto;
  padding-block: 0;
}

.site-header {
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(31, 48, 52, 0.09);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--kc-ink);
  font-size: 1.04rem;
  font-weight: 760;
  letter-spacing: 0;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(15, 159, 154, 0.16);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.94rem;
  color: var(--kc-charcoal);
}

.site-nav a {
  opacity: 0.76;
}

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

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--kc-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.language-switch a {
  min-width: 42px;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: 10px;
  border-radius: 6px;
  color: var(--kc-muted);
  font-size: 0.82rem;
  font-weight: 680;
  line-height: 1;
}

.language-switch a.is-active {
  background: var(--kc-ink);
  color: #ffffff;
  opacity: 1;
}

.hero {
  min-height: calc(100vh - 68px);
  padding-block: clamp(44px, 7vw, 86px) 42px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(180deg, #f9fbfb 0%, #eef7f6 72%, #ffffff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: clamp(36px, 6vw, 76px);
}

.hero-copy {
  max-width: 660px;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  font-size: 0.96rem;
  font-weight: 650;
  color: var(--kc-charcoal);
}

.app-badge img {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  box-shadow: 0 12px 26px rgba(15, 159, 154, 0.18);
}

.hero h1 {
  max-width: 13ch;
  margin: 0 0 22px;
  color: var(--kc-ink);
  font-size: clamp(3.1rem, 7vw, 6.6rem);
  line-height: 0.94;
  font-weight: 760;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 620px;
  margin-bottom: 30px;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0.82rem 1.25rem;
  font-weight: 680;
  line-height: 1;
  border: 1px solid transparent;
  transition: transform 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}

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

.btn.primary {
  background: var(--kc-teal);
  color: #ffffff;
  box-shadow: 0 12px 26px rgba(15, 159, 154, 0.22);
}

.btn.primary:hover {
  background: var(--kc-teal-dark);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.72);
  color: var(--kc-ink);
  border-color: var(--kc-line);
}

.btn.large {
  min-width: 188px;
  padding-inline: 1.5rem;
}

.availability {
  margin: 0;
  font-size: 0.94rem;
  color: #728083;
}

.hero-visual {
  position: relative;
  margin: 0;
}

.hero-visual img {
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--kc-shadow);
  border: 1px solid rgba(31, 48, 52, 0.08);
}

.section-panel {
  background: #ffffff;
}

.features {
  padding-block: clamp(76px, 9vw, 118px);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 34px;
}

.section-heading h2,
.download h2 {
  color: var(--kc-ink);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: 0;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--kc-teal);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  min-height: 245px;
  padding: 24px;
  border-radius: 8px;
  background: var(--kc-soft);
  border: 1px solid var(--kc-line);
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border-radius: 8px;
  background: #ffffff;
  color: var(--kc-teal-dark);
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(23, 34, 36, 0.07);
}

.feature-icon img {
  width: 28px;
  height: 28px;
  display: block;
}

.feature-card h3,
.steps h3 {
  margin-bottom: 8px;
  color: var(--kc-ink);
  font-size: 1.08rem;
}

.feature-card p,
.steps p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.58;
}

.screenshots {
  padding-block: clamp(72px, 9vw, 112px);
  background: var(--kc-soft);
}

.screenshots .section-heading p:last-child {
  max-width: 620px;
  font-size: 1.05rem;
  line-height: 1.65;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  align-items: start;
}

.screenshot-card {
  display: grid;
  gap: 16px;
}

.screenshot-frame {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--kc-line);
  border-radius: 8px;
  background: #f8fbfb;
  box-shadow: 0 18px 44px rgba(22, 40, 42, 0.10);
}

.screenshot-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  border-radius: 6px;
}

.screenshot-frame.is-tall img {
  aspect-ratio: 3 / 4;
}

.screenshot-card h3 {
  margin: 0;
  color: var(--kc-ink);
  font-size: 1.08rem;
}

.screenshot-card p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.6;
}

.workflow {
  padding-block: clamp(72px, 9vw, 112px);
  background: #ffffff;
}

.workflow-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1fr);
  gap: clamp(36px, 6vw, 86px);
  align-items: start;
}

.steps {
  display: grid;
  gap: 14px;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 22px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 48, 52, 0.08);
}

.steps span {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--kc-ink);
  color: #ffffff;
  font-weight: 740;
}

.workflow-note {
  grid-column: 2;
  margin: 4px 0 0;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid rgba(31, 48, 52, 0.1);
  background: rgba(47, 192, 203, 0.08);
  color: var(--kc-muted);
  font-size: 0.94rem;
  line-height: 1.6;
}

.download {
  padding-block: clamp(68px, 8vw, 96px);
}

.download.section-panel {
  background: var(--kc-soft);
}

.download-inner {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: clamp(28px, 5vw, 48px);
  border-radius: 8px;
  background: #ffffff;
  border: 1px solid var(--kc-line);
}

.download-icon {
  width: 84px;
  height: 84px;
  border-radius: 20px;
  box-shadow: 0 16px 32px rgba(15, 159, 154, 0.18);
}

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

.site-footer {
  background: var(--kc-ink);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-block: 28px;
}

.footer-inner p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.footer-inner a {
  color: #9de4df;
}

.guide-hero {
  padding-block: clamp(62px, 8vw, 108px);
  background: linear-gradient(180deg, #f9fbfb 0%, #eef7f6 100%);
}

.guide-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.58fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.guide-hero h1 {
  margin: 0 0 18px;
  color: var(--kc-ink);
  font-size: clamp(2.6rem, 6vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.guide-hero .section-heading {
  margin-bottom: 0;
}

.guide-hero .section-heading p:last-child {
  max-width: 720px;
  font-size: 1.08rem;
  line-height: 1.68;
}

.guide-note {
  padding: 24px;
  border: 1px solid var(--kc-line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 16px 38px rgba(22, 40, 42, 0.09);
}

.guide-note h2 {
  margin: 0 0 10px;
  color: var(--kc-ink);
  font-size: 1.12rem;
}

.guide-note p {
  margin: 0;
  line-height: 1.62;
}

.guide-steps-section {
  padding-block: clamp(64px, 8vw, 104px);
}

.guide-steps {
  display: grid;
  gap: 24px;
  list-style: none;
}

.guide-step {
  display: grid;
  grid-template-columns: minmax(240px, 0.48fr) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--kc-line);
  border-radius: 8px;
  background: #ffffff;
}

.guide-step-copy {
  display: grid;
  gap: 12px;
  align-content: start;
}

.guide-step-number {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--kc-ink);
  color: #ffffff;
  font-weight: 740;
}

.guide-step h2 {
  margin: 0;
  color: var(--kc-ink);
  font-size: clamp(1.35rem, 2.5vw, 2.1rem);
  line-height: 1.16;
}

.guide-step p {
  margin: 0;
  line-height: 1.66;
}

.guide-caution {
  padding: 12px 14px;
  border-left: 4px solid var(--kc-teal);
  border-radius: 8px;
  background: #eef7f6;
  color: var(--kc-ink);
}

.guide-caution strong {
  color: var(--kc-ink);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.guide-shot {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--kc-line);
  border-radius: 8px;
  background: #f8fbfb;
  box-shadow: 0 18px 44px rgba(22, 40, 42, 0.10);
}

.guide-shot img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  border-radius: 6px;
}

.guide-shot.is-wide img {
  max-height: 640px;
}

.guide-shot.is-compact {
  max-width: 440px;
  justify-self: center;
}

.guide-return {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero {
    min-height: auto;
  }

  .hero-grid,
  .workflow-grid,
  .guide-hero-grid,
  .guide-step {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero h1 {
    max-width: 13ch;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .workflow-note {
    grid-column: 1;
  }

  .screenshot-frame img,
  .screenshot-frame.is-tall img {
    aspect-ratio: auto;
  }

  .download-inner {
    grid-template-columns: 72px 1fr;
  }

  .download-inner .btn {
    grid-column: 1 / -1;
    width: fit-content;
  }
}

@media (max-width: 700px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 14px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.88rem;
  }

  .language-switch {
    align-self: flex-start;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
  }

  .hero {
    padding-top: 36px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.75rem, 13vw, 4.2rem);
  }

  .hero-actions,
  .hero-actions .btn {
    width: 100%;
  }

  .feature-grid,
  .download-inner {
    grid-template-columns: 1fr;
  }

  .guide-step {
    padding: 18px;
  }

  .guide-shot.is-compact {
    max-width: none;
  }

  .feature-card {
    min-height: 0;
  }

  .steps li {
    grid-template-columns: 36px 1fr;
    padding: 18px;
  }

  .steps span {
    width: 36px;
    height: 36px;
  }

  .footer-inner {
    flex-direction: column;
  }
}