:root {
  --lp-ink: #10192b;
  --lp-ink-soft: #1b2740;
  --lp-paper: #f7f8fa;
  --lp-surface: #ffffff;
  --lp-line: #d7dbe3;
  --lp-text: #1c2430;
  --lp-text-dim: #667085;
  --lp-text-on-ink: #eef1f6;
  --lp-text-on-ink-dim: #a9b3c6;
  --lp-accent: #1f6feb;
  --lp-accent-hover: #1a5fd0;
  --lp-accent-subtle: #eef2fd;
  --radius-sm: 8px;
  --radius-md: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* sticky なトップバーに見出しが隠れないようにする */
section[id] {
  scroll-margin-top: 72px;
}

body {
  margin: 0;
  color: var(--lp-text);
  background: var(--lp-surface);
  font-family: "Noto Sans JP", "Segoe UI Variable Text", "Segoe UI", "Yu Gothic UI",
    "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.lp-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--lp-surface);
  border-bottom: 1px solid var(--lp-line);
}

.lp-topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.lp-brand,
.lp-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--lp-text);
  font-size: 18px;
  font-weight: 750;
  text-decoration: none;
  letter-spacing: -0.03em;
}

.lp-brand-mark {
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: white;
  background: var(--lp-accent);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
}

.lp-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 550;
}

.lp-nav a {
  color: var(--lp-text-dim);
  text-decoration: none;
}

.lp-nav a:hover {
  color: var(--lp-text);
}

.lp-nav .lp-nav-cta {
  white-space: nowrap;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--lp-accent-subtle);
  color: var(--lp-accent-hover);
  font-weight: 700;
}

.lp-nav .lp-nav-booth {
  background: var(--lp-accent);
  color: #fff;
}

.lp-nav .lp-nav-booth:hover {
  background: var(--lp-accent-hover);
  color: #fff;
}

.lp-hero {
  color: var(--lp-text-on-ink);
  background: linear-gradient(180deg, var(--lp-ink) 0%, var(--lp-ink-soft) 100%);
}

.lp-hero-inner {
  max-width: 1280px;
  min-height: 520px;
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
  gap: 48px;
}

.lp-eyebrow,
.lp-kicker {
  margin: 0 0 12px;
  color: var(--lp-accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.lp-eyebrow {
  color: #9bbcff;
}

.lp-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 750;
  white-space: nowrap;
  line-height: 1.32;
  letter-spacing: 0.01em;
}

.lp-hero-lead {
  max-width: 36em;
  margin: 0 0 26px;
  color: var(--lp-text-on-ink-dim);
  font-size: 16px;
}

.lp-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.lp-button {
  min-height: 46px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease;
}

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

.lp-button-primary:hover {
  background: var(--lp-accent-hover);
}

.lp-button-ghost {
  color: var(--lp-text-on-ink);
  border-color: #59657b;
  background: transparent;
}

.lp-button-ghost:hover {
  border-color: #a9b3c6;
  background: rgba(255, 255, 255, 0.06);
}

.lp-trust-list {
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  color: var(--lp-text-on-ink-dim);
  font-size: 12px;
}

.lp-trust-list li::before {
  content: "✓";
  margin-right: 6px;
  color: #8fb2ff;
  font-weight: 800;
}

.lp-hero-figure {
  margin: 0;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.2);
}

.lp-hero-figure img {
  width: 100%;
  border-radius: 7px;
}

.lp-hero-figure figcaption {
  padding-top: 8px;
  color: var(--lp-text-dim);
  font-size: 12px;
  text-align: center;
}

.lp-section {
  background: var(--lp-surface);
}

.lp-section-sunken {
  background: var(--lp-paper);
}

.lp-section-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 72px 24px;
}

.lp-section h2,
.lp-final-cta h2 {
  max-width: 26em;
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 31px);
  line-height: 1.5;
  letter-spacing: 0.005em;
}

.lp-section-lead {
  max-width: 44em;
  margin: 0 0 32px;
  color: var(--lp-text-dim);
}

.lp-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.lp-step {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--lp-line);
  border-radius: var(--radius-md);
  background: var(--lp-surface);
}

.lp-step-number {
  color: var(--lp-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.lp-step h3,
.lp-model-card h3,
.lp-benefits h3 {
  margin: 8px 0;
  font-size: 17px;
  line-height: 1.5;
}

.lp-step p,
.lp-model-card p,
.lp-benefits p {
  margin: 0;
  color: var(--lp-text-dim);
  font-size: 14px;
}

.lp-step code {
  display: block;
  margin-top: 16px;
  padding: 9px 10px;
  border-radius: 6px;
  color: #344054;
  background: var(--lp-paper);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 11px;
  line-height: 1.6;
}

.lp-model-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lp-model-card {
  min-width: 0;
  padding: 20px 22px;
  border: 1px solid var(--lp-line);
  border-radius: var(--radius-md);
  background: var(--lp-surface);
}

.lp-model-type {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  color: #1254bd;
  background: #e9f0ff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.lp-model-type-mip {
  color: #525e70;
  background: #edf0f4;
}

.lp-model-card h3 {
  margin-top: 10px;
}

.lp-model-result {
  display: block;
  margin-top: 14px;
  color: var(--lp-accent-hover);
  font-size: 12px;
  font-weight: 700;
}

.lp-note {
  margin: 16px 0 0;
  color: var(--lp-text-dim);
  font-size: 12px;
}

.lp-benefits {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--lp-line);
}

.lp-benefits article {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--lp-line);
}

.lp-benefit-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--lp-accent);
  background: var(--lp-accent-subtle);
  font-size: 17px;
  font-weight: 800;
}

.lp-benefits h3 {
  margin: 0 0 4px;
}

.lp-demo-inner {
  max-width: 1240px;
}

.lp-demo-frame {
  position: relative;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--lp-surface);
}

.lp-demo-frame::before,
.lp-demo-frame::after {
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--lp-accent);
  content: "";
  pointer-events: none;
}

.lp-demo-frame::before {
  top: 6px;
  left: 6px;
  border-right: 0;
  border-bottom: 0;
}

.lp-demo-frame::after {
  right: 6px;
  bottom: 6px;
  border-top: 0;
  border-left: 0;
}

.lp-demo-frame iframe {
  display: block;
  width: 100%;
  height: 680px;
  border: 1px solid var(--lp-line);
  border-radius: var(--radius-sm);
  background: var(--lp-paper);
}

.lp-demo-fallback {
  margin: 14px 0 0;
  color: var(--lp-text-dim);
  font-size: 13px;
}

.lp-demo-fallback a {
  color: var(--lp-accent-hover);
  font-weight: 700;
}

.lp-final-cta {
  color: var(--lp-text-on-ink);
  background: var(--lp-ink);
}

.lp-final-cta-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.lp-final-cta h2 {
  margin-bottom: 8px;
  font-size: 23px;
}

.lp-final-cta p:not(.lp-kicker) {
  margin: 0;
  color: var(--lp-text-on-ink-dim);
  font-size: 14px;
}

.lp-final-cta .lp-kicker {
  color: #9bbcff;
}

.lp-final-cta .lp-button {
  flex: 0 0 auto;
}

.lp-final-cta-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 10px;
}

.lp-footer {
  color: var(--lp-text-on-ink-dim);
  background: #0b1220;
}

.lp-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 12px;
}

.lp-footer-brand {
  color: #fff;
}

.lp-footer-inner p {
  flex: 1;
  margin: 0;
}

.lp-footer-inner > a:last-child {
  color: var(--lp-text-on-ink);
}

.lp-footer-inner > a {
  color: var(--lp-text-on-ink);
}

@media (max-width: 800px) {
  .lp-hero-inner {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 50px 24px;
  }

  .lp-hero-figure {
    max-width: 620px;
  }

  .lp-steps {
    grid-template-columns: 1fr;
  }

  .lp-step {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    column-gap: 12px;
  }

  .lp-step-number {
    grid-row: span 3;
    padding-top: 11px;
  }

  .lp-step h3 {
    margin-top: 4px;
  }

  .lp-step code {
    grid-column: 2;
  }

  .lp-section-inner {
    padding: 56px 24px;
  }

  .lp-demo-frame iframe {
    height: 580px;
  }
}

@media (max-width: 560px) {
  .lp-topbar-inner {
    padding: 10px 16px;
  }

  .lp-nav {
    gap: 12px;
  }

  .lp-nav a:not(.lp-nav-cta) {
    display: none;
  }

  .lp-nav .lp-nav-cta {
    padding: 8px 10px;
    font-size: 13px;
  }

  .lp-hero-inner {
    padding: 42px 18px;
  }

  .lp-hero h1 {
    font-size: clamp(26px, 8.2vw, 38px);
  }

  .lp-hero-lead {
    font-size: 15px;
  }

  .lp-trust-list {
    gap: 6px 12px;
  }

  .lp-section-inner {
    padding: 48px 18px;
  }

  .lp-model-grid {
    grid-template-columns: 1fr;
  }

  .lp-demo-frame {
    padding: 14px;
  }

  .lp-demo-frame iframe {
    height: 520px;
  }

  .lp-final-cta-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 38px 18px;
  }

  .lp-footer-inner {
    padding: 20px 18px;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .lp-footer-inner p {
    flex: 1 0 100%;
    order: 1;
  }
}