:root {
  /* Backgrounds */
  --bg-base: #FAFAF8;
  --bg-warm: #F2F0EB;
  --bg-card: #FFFFFF;

  /* Text */
  --text-heading: #1A1A18;
  --text-body: #4A4A45;
  --text-sub: #6A6A65;

  /* Accents */
  --accent-primary: #2E6B8A;
  --accent-secondary: #5A8F6E;
  --accent-warm: #C07A4E;

  /* Misc */
  --border-light: #E8E6E0;
  --shadow-card: 0 1px 3px rgba(26, 26, 24, 0.06), 0 4px 12px rgba(26, 26, 24, 0.04);
  --shadow-card-hover: 0 2px 6px rgba(26, 26, 24, 0.08), 0 8px 24px rgba(26, 26, 24, 0.06);
  --radius: 8px;
  --content-max: 720px;
  --page-max: 1080px;

  /* Derived */
  --accent-primary-dark: #245a75;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-decoration-color: var(--accent-primary);
}

ul {
  list-style: none;
}

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

/* ===== LAYOUT ===== */
.container {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

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

/* ===== NAV ===== */
.nav, .nav * {
  box-sizing: border-box !important;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.nav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px; 
}

.logo-image {
  display: block;
  width: auto;
  height: auto;
  max-height: 32px;
  margin: 0;
  padding: 0;
}

@media (max-width: 768px) {
  .logo-image {
    max-height: 28px;
  }
}

.logo-text-group {
  font-size: 20px;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-narrative {
  font-family: 'Lora', serif;
  font-weight: 600;
  color: var(--text-heading);
}

.logo-iot {
  font-weight: 700;
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-body);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--text-heading);
  text-decoration: none;
}

.nav-cta {
  background: var(--accent-primary);
  color: var(--bg-card) !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 13px !important;
  transition: background 0.15s;
}

.nav-cta:hover {
  background: var(--accent-primary-dark);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-heading);
  margin: 4px 0;
  border-radius: 1px;
  transition: 0.2s;
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 96px;
  background: var(--bg-warm);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

.hero-sub {
  margin-top: 20px;
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.9;
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.btn-primary {
  display: inline-block;
  background: var(--accent-primary);
  color: var(--bg-card) !important;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s;
}

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

.link-arrow {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.15s;
}

.link-arrow:hover {
  color: var(--accent-primary-dark);
  text-decoration: none;
}

/* Hero visual */
.hero-visual {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  min-width: 180px;
  transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
}

.hero-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.hero-card-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.hero-card-row {
  display: flex;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  padding: 4px 0;
  border-bottom: 1px solid var(--border-light);
}

.hero-card-row:last-child {
  border: none;
}

.hc-key {
  color: var(--text-sub);
}

.hc-val {
  color: var(--text-heading);
  font-weight: 500;
}

.hero-card--raw {
  background: #1a1a1b;
  border: 1px solid rgba(255,255,255,0.1);
}

.hero-card--raw .hero-card-label {
  color: #C0A050;
}

.hero-card--raw .hero-card-row {
  border-bottom-color: #3A3A38;
}

.hero-card--raw .hc-key {
  color: #6A9FB5;
}

.hero-card--raw .hc-val {
  color: #D4D4D4;
}

.hero-card--narrative {
  background: #1a1a1b;
  border: 1px solid rgba(255,255,255,0.1);
}

.hero-card--narrative .hero-card-label {
  color: #C0A050;
}

.hc-narrative {
  font-size: 14px;
  color: #D4D4D4;
  line-height: 1.7;
}

.hero-arrow {
  flex-shrink: 0;
  animation: arrow-move 1.8s ease-in-out infinite;
}

@keyframes arrow-move {
  0% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(6px);
  }

  100% {
    transform: translateX(0);
  }
}

/* ===== SECTION TITLES ===== */
.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-heading);
  text-align: center;
  line-height: 1.5;
  letter-spacing: -0.01em;
  max-width: var(--content-max);
  margin: 0 auto 24px;
}

.section-lead {
  text-align: center;
  max-width: var(--content-max);
  margin: 0 auto 48px;
  color: var(--text-body);
}

.section-bridge {
  text-align: center;
  margin-top: 48px;
  font-size: 17px;
  color: var(--text-heading);
  font-weight: 700;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 32px;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* ===== SECTION 2: WALLS ===== */
.wall-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.wall-card h3 {
  font-size: 18px;
  color: var(--text-heading);
  margin: 16px 0 12px;
}

.wall-card p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
}

.wall-icon {
  height: 32px;
}

/* ===== SECTION 3: DEMO ===== */
.demo-terminal {
  max-width: 720px;
  margin: 0 auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(26, 26, 24, 0.12), 0 1px 4px rgba(26, 26, 24, 0.08);
}

.demo-toolbar {
  background: #2A2A28;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #4A4A45;
}

.demo-dot:first-child {
  background: #E25D5D;
}

.demo-dot:nth-child(2) {
  background: #E2B95D;
}

.demo-dot:nth-child(3) {
  background: #5DE27A;
}

.demo-toolbar-title {
  margin-left: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #8A8A82;
}

.demo-body {
  background: #1E1E1E;
  padding: 24px;
}

.demo-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.demo-tab {
  background: #2A2A28;
  color: #8A8A82;
  border: 1px solid #3A3A38;
  border-radius: 6px;
  padding: 6px 16px;
  font-size: 13px;
  font-family: 'Noto Sans JP', sans-serif;
  cursor: pointer;
  transition: 0.15s;
}

.demo-tab:hover {
  color: #ccc;
  border-color: #555;
}

.demo-tab.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.demo-sensor {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #9DA5B4;
  line-height: 1.8;
  margin-bottom: 16px;
  min-height: 60px;
}

.demo-sensor span {
  display: inline-block;
  margin-right: 24px;
}

.demo-sensor .ds-key {
  color: #6A9FB5;
}

.demo-sensor .ds-val {
  color: #D4D4D4;
}

.demo-run-btn {
  background: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 24px;
  font-size: 14px;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  cursor: pointer;
  transition: 0.15s;
  margin-bottom: 16px;
}

.demo-run-btn:hover {
  background: var(--accent-primary-dark);
}

.demo-run-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.demo-output {
  display: none;
  background: #252525;
  border-left: 3px solid var(--accent-warm);
  border-radius: 4px;
  padding: 16px;
}

.demo-output.show {
  display: block;
}

.demo-output-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent-warm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.demo-output-text {
  font-size: 15px;
  color: #E0E0E0;
  line-height: 1.8;
  min-height: 24px;
}

.demo-output-text .cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent-warm);
  animation: blink 0.8s step-end infinite;
  vertical-align: text-bottom;
  margin-left: 1px;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.demo-after {
  text-align: center;
  margin-top: 40px;
  font-size: 16px;
  color: var(--text-heading);
  line-height: 1.8;
}

/* Demo tabs row */
.demo-tabs-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  gap: 12px;
  flex-wrap: wrap;
}

.demo-phase-tabs {
  display: flex;
  gap: 4px;
}

.demo-phase {
  background: transparent;
  color: #6A6A65;
  border: 1px solid #3A3A38;
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 11px;
  font-family: 'Noto Sans JP', sans-serif;
  cursor: pointer;
  transition: 0.15s;
}

.demo-phase:hover {
  color: #ccc;
  border-color: #555;
}

.demo-phase.active {
  background: #3A5A3A;
  color: #A0D8A0;
  border-color: #3A5A3A;
}

/* 3-layer output */
.demo-layer {
  margin-bottom: 14px;
  padding-left: 14px;
  border-left: 2px solid transparent;
}

.demo-layer:last-child {
  margin-bottom: 0;
}

.demo-layer--situation {
  border-left-color: #6A9FB5;
}

.demo-layer--estimation {
  border-left-color: #C0A050;
}

.demo-layer--recommendation {
  border-left-color: #7AAF6A;
}

.demo-layer-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
  line-height: 1;
}

.demo-layer--situation .demo-layer-label {
  color: #6A9FB5;
}

.demo-layer--estimation .demo-layer-label {
  color: #C0A050;
}

.demo-layer--recommendation .demo-layer-label {
  color: #7AAF6A;
}

.demo-layer-text {
  font-size: 14px;
  color: #D4D4D4;
  line-height: 1.7;
}

.demo-layer-basis {
  font-size: 11px;
  color: #7A7A72;
  margin-top: 4px;
  font-style: italic;
}

.demo-layer-action {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: #8A8A82;
  border: 1px solid #3A3A38;
  border-radius: 4px;
  padding: 4px 10px;
}

.demo-footnote {
  font-size: 11px;
  color: #6A6A62;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid #333;
}

/* ===== DEMO DIALOGUE SIMULATION ===== */
.demo-dialogue {
  display: none;
  margin-top: 20px;
  border-top: 1px solid #333;
  padding-top: 16px;
}

.demo-dialogue.show {
  display: block;
}

.demo-dialogue-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.demo-dialogue-icon {
  font-size: 16px;
}

.demo-dialogue-title {
  font-size: 12px;
  font-weight: 700;
  color: #9A9890;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.demo-dialogue-thread {
  max-height: 320px;
  overflow-y: auto;
  padding-right: 8px;
}

.demo-dialogue-thread::-webkit-scrollbar {
  width: 4px;
}

.demo-dialogue-thread::-webkit-scrollbar-thumb {
  background: #3A3A38;
  border-radius: 2px;
}

.dialogue-msg {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  max-width: 85%;
  animation: msgFadeIn 0.3s ease-out;
}

@keyframes msgFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dialogue-msg--human {
  background: #2A3A2A;
  margin-left: auto;
  border-bottom-right-radius: 2px;
}

.dialogue-msg--ai {
  background: #2A2A35;
  margin-right: auto;
  border-bottom-left-radius: 2px;
}

.dialogue-msg--extract {
  background: #2A2D35;
  border-left: 2px solid #C0A050;
}

.dialogue-msg--followup {
  background: #2A2D35;
  border-left: 2px solid #6A9FB5;
}

.dialogue-msg--prompt {
  background: #2A2D35;
  border-left: 2px solid #7AAF6A;
}

.dialogue-msg-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.dialogue-msg--human .dialogue-msg-label {
  color: #7AAF6A;
}

.dialogue-msg--ai .dialogue-msg-label {
  color: #6A9FB5;
}

.dialogue-msg-text {
  font-size: 13px;
  color: #D4D4D4;
  line-height: 1.6;
}

.dialogue-msg-text .cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent-warm);
  animation: blink 0.8s step-end infinite;
  vertical-align: text-bottom;
  margin-left: 1px;
}


/* ===== SECTION 3.5: DIALOGUE LOOP ===== */
.dialogue-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  margin: 0 auto 64px;
  max-width: 880px;
}

.dialogue-step {
  flex: 1;
  max-width: 260px;
  text-align: center;
  position: relative;
}

.dialogue-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.dialogue-step-icon {
  height: 32px;
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}

.dialogue-step h3 {
  font-size: 17px;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.dialogue-step p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}

.dialogue-arrow {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding-top: 40px;
}

/* 対話の進化ビフォーアフター */
.dialogue-evolution {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
  max-width: 880px;
  margin: 0 auto 64px;
}

.dialogue-evo-card {
  padding: 24px;
}

.dialogue-evo-card--before {
  border-left: 3px solid var(--border-light);
  opacity: 0.8;
}

.dialogue-evo-card--after {
  border-left: 3px solid var(--accent-secondary);
}

.dialogue-evo-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.dialogue-evo-card--before .dialogue-evo-label {
  color: var(--text-sub);
}

.dialogue-evo-card--after .dialogue-evo-label {
  color: var(--accent-secondary);
}

.dialogue-evo-msg {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-body);
}

.dialogue-evo-msg p {
  margin-bottom: 8px;
}

.evo-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 4px;
}

.evo-tag--situation {
  background: rgba(106, 159, 181, 0.12);
  color: #2E6B8A;
}

.evo-tag--estimation {
  background: rgba(192, 160, 80, 0.12);
  color: #A08030;
}

.evo-tag--recommendation {
  background: rgba(122, 175, 106, 0.12);
  color: #5A8F6E;
}

.dialogue-evo-note {
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 12px;
  font-style: italic;
}

.dialogue-evo-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.evo-arrow-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-warm);
  white-space: nowrap;
}

/* 設計原則 */
.dialogue-principles {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.dialogue-principles h3 {
  font-size: 18px;
  color: var(--text-heading);
  margin-bottom: 24px;
}

.dialogue-principle-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.dialogue-principle {
  text-align: center;
}

.dp-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.dp-text {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}

.dp-text strong {
  color: var(--text-heading);
  display: block;
  margin-bottom: 4px;
}

/* ===== SECTION 4: COMPARE ===== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
}

.compare-card {
  border-radius: var(--radius);
  padding: 32px;
}

.compare-card--old {
  background: var(--border-light);
  color: var(--text-sub);
}

.compare-card--old h3 {
  color: var(--text-sub);
  font-size: 16px;
  margin-bottom: 16px;
}

.compare-card--new {
  transform: scale(1.02); 
  z-index: 1;
  background: var(--bg-card);
  border-left: 3px solid var(--accent-primary);
  box-shadow: var(--shadow-card);
}

.compare-card--new h3 {
  color: var(--text-heading);
  font-size: 16px;
  margin-bottom: 16px;
}

.compare-list {
  margin-bottom: 20px;
}

.compare-list li {
  font-size: 15px;
  padding: 4px 0;
  line-height: 1.7;
}

.compare-card--old .compare-list li::before {
  content: '—  ';
  color: var(--text-sub);
}

.compare-card--new .compare-list li {
  color: var(--text-body);
}

.compare-card--new .compare-list li::before {
  content: '→  ';
  color: var(--accent-primary);
}

.compare-verdict {
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.cv-row {
  font-size: 15px;
  padding: 4px 0;
  line-height: 1.7;
}

.cv-mark {
  font-weight: 700;
  margin-right: 6px;
}

.cv-bad .cv-mark {
  color: var(--text-sub);
}

.cv-good .cv-mark {
  color: var(--accent-secondary);
}

.cv-good {
  color: var(--text-heading);
}

/* ===== SECTION 5: ARCHITECTURE ===== */
.arch-stages {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 16px;
  margin: 0 auto 48px;
  max-width: 880px;
}

.arch-card {
  flex: 1;
  max-width: 280px;
  text-align: center;
  border-top: 3px solid transparent;
}

.arch-card--1 {
  border-top-color: var(--accent-primary);
}

.arch-card--2 {
  border-top-color: var(--accent-secondary);
}

.arch-card--3 {
  border-top-color: var(--accent-warm);
}

.arch-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.arch-card--1 .arch-label {
  color: var(--accent-primary);
}

.arch-card--2 .arch-label {
  color: var(--accent-secondary);
}

.arch-card--3 .arch-label {
  color: var(--accent-warm);
}

.arch-card h3 {
  font-size: 20px;
  color: var(--text-heading);
  margin-bottom: 4px;
}

.arch-where {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.arch-card p {
  font-size: 15px;
  line-height: 1.8;
}

.arch-arrow {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.arch-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 720px;
  margin: 0 auto 32px;
  text-align: center;
}

.arch-metric-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-heading);
}

.arch-metric-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-heading);
  margin: 4px 0;
}

.arch-metric-desc {
  font-size: 13px;
  color: var(--text-sub);
}

/* LLMの3つの役割 */
.llm-roles {
  max-width: 720px;
  margin: 0 auto 32px;
  padding: 32px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.llm-roles-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-heading);
  text-align: center;
  margin-bottom: 24px;
}

.llm-roles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.llm-role {
  text-align: center;
}

.llm-role-icon {
  font-size: 24px;
  margin-bottom: 8px;
}

.llm-role-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.llm-role-desc {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

.arch-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 8px;
}

.arch-link {
  text-align: center;
}

/* ===== SECTION 6: ENTRY ===== */
.entry-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
}

.entry-card {
  text-align: center;
}

.entry-card h3 {
  font-size: 17px;
  color: var(--text-heading);
  margin: 16px 0 12px;
}

.entry-card p {
  font-size: 15px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.entry-icon {
  height: 28px;
  display: flex;
  justify-content: center;
}

/* ===== SECTION 7: SOLUTIONS ===== */
.solution-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 880px;
  margin: 0 auto 48px;
}

.solution-card {
  border-left: 3px solid transparent;
}

.solution-card--kit {
  border-left-color: var(--accent-primary);
}

.solution-card--pro {
  border-left-color: var(--accent-warm);
  position: relative;
}

.solution-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--accent-warm);
  color: #fff;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.solution-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-heading);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.solution-card h3 {
  font-family: 'Lora', serif;
  font-size: 20px;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.solution-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.solution-features li {
  font-size: 15px;
  padding: 3px 0;
  line-height: 1.7;
}

.solution-features li::before {
  content: '✓ ';
  color: var(--accent-secondary);
  font-weight: 700;
}

.solution-card .link-arrow {
  display: inline-block;
  margin-top: 16px;
}

.consult-block {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  border-top: 1px solid var(--border-light);
  padding-top: 40px;
}

.consult-block h3 {
  font-size: 18px;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.consult-block p {
  font-size: 15px;
  color: var(--text-body);
  margin-bottom: 16px;
}

/* ===== SECTION 10: FOOTER CTA ===== */
.footer-cta {
  text-align: center;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* === Company === */
.company-section {
  padding: 40px 0;
  background-color: var(--bg-base);
}

.vision-title, .profile-title {
  font-family: 'Lora', serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 12px;
}

.vision-title::after, .profile-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent-primary);
}

.vision-roadmap {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: flex-start;
  gap: 4px;
  margin-top: 30px;
}

.vision-step {
  background: var(--bg-warm);
  padding: 12px 4px;
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.3s ease;
}

.vision-step--active {
  background: #fff;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
}

.vs-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sub);
  margin-bottom: 8px;
  display: block;
}

.vision-step--active .vs-label {
  color: var(--accent-warm);
}

.vs-text {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-heading);
}

.vision-step--active .vs-text {
  color: var(--text-heading);
}

.vs-product {
  margin-top: 10px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-primary);
  opacity: 0.8;
  letter-spacing: 0.04em;
}

.vision-step--active .vs-product {
  color: var(--accent-warm);
}

.vision-arrow {
  padding-top: 45px;
  color: var(--border-light);
  font-weight: bold;
  font-size: 16px;
}

.info-list {
  border-top: 1px solid var(--border-light);
}

.info-item {
  display: flex;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 15px;
}

.info-label {
  width: 120px;
  font-weight: 700;
  color: var(--text-sub);
  flex-shrink: 0;
}

.info-value {
  color: var(--text-body);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  .vision-roadmap {
    grid-template-columns: 1fr; /* スマホでは縦並びに */
    gap: 16px;
  }
  
  .vision-arrow {
    padding: 0;
    text-align: center;
    transform: rotate(90deg);
    margin: -8px 0;
  }
  
  .info-item {
    flex-direction: column;
    gap: 4px;
  }
  
  .info-label {
    width: 100%;
    font-size: 13px;
  }
}


.evo-tag--company {
  background: rgba(106, 159, 181, 0.12);
  color: var(--accent-primary);
}

.company-container {
    max-width: var(--page-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.company-grid {
    display: grid;
    gap: 5rem; /* gap-20 */
}

@media (min-width: 768px) {
    .company-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Vision Content */
.vision-description {
  color: var(--text-body);
  line-height: 1.625;
  margin-bottom: 1.5rem;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-warm);
  padding: 48px 0 24px;
  border-top: 1px solid var(--border-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand .nav-logo {
  font-size: 18px;
}

.footer-copy {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-sub);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-sub);
  display: block;
  padding: 3px 0;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--text-heading);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-sub);
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 100px 0 64px;
  }

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

  .hero h1 {
    font-size: 28px;
  }

  .hero-visual {
    flex-direction: column;
    gap: 12px;
  }

  .hero-arrow svg {
    transform: rotate(90deg);
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 22px;
  }

  .wall-cards {
    grid-template-columns: 1fr;
  }

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

  .arch-stages {
    flex-direction: column;
    align-items: center;
  }

  .arch-arrow svg {
    transform: rotate(90deg);
  }

  .arch-card {
    max-width: 100%;
  }

  .arch-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .llm-roles-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .entry-cards {
    grid-template-columns: 1fr;
  }

  .solution-cards {
    grid-template-columns: 1fr;
  }

  .byok-models {
    flex-direction: column;
    gap: 24px;
  }

  .vision-block {
    padding: 40px 24px;
  }

  .vision-main {
    font-size: 20px;
  }

  .vision-roadmap {
    flex-direction: column;
    gap: 8px;
  }

  .vision-arrow {
    transform: rotate(90deg);
  }

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

  .cta-actions {
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 16px 24px;
    gap: 12px;
  }

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

  .nav-toggle {
    display: block;
  }

  /* Dialogue section responsive */
  .dialogue-flow {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .dialogue-step {
    max-width: 100%;
  }

  .dialogue-arrow {
    padding-top: 0;
  }

  .dialogue-arrow svg {
    transform: rotate(90deg);
  }

  .dialogue-evolution {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .dialogue-evo-arrow {
    flex-direction: row;
    justify-content: center;
  }

  .dialogue-evo-arrow svg {
    transform: rotate(90deg);
  }

  .dialogue-principle-items {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ===== CONTACT MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(26, 26, 24, 0.4);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.open {
  display: flex;
}

.modal-container {
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: 0 8px 40px rgba(26, 26, 24, 0.15), 0 2px 8px rgba(26, 26, 24, 0.08);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-heading);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sub);
  padding: 4px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--bg-warm);
  color: var(--text-heading);
}

.modal-body {
  overflow-y: auto;
  flex: 1;
}

/* --- iframe mode --- */
.modal-iframe {
  width: 100%;
  height: 520px;
  border: none;
  display: none;
}

.modal-iframe.active {
  display: block;
}

/* --- fallback form mode --- */
.modal-fallback {
  display: none;
  padding: 24px;
}

.modal-fallback.active {
  display: block;
}

.fb-field {
  margin-bottom: 20px;
}

.fb-field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.fb-field input,
.fb-field select,
.fb-field textarea {
  width: 100%;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 15px;
  color: var(--text-heading);
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 10px 14px;
  transition: border-color 0.15s;
  outline: none;
}

.fb-field input:focus,
.fb-field select:focus,
.fb-field textarea:focus {
  border-color: var(--accent-primary);
}

.fb-field textarea {
  resize: vertical;
}

.fb-submit {
  width: 100%;
  text-align: center;
  padding: 14px;
  font-size: 15px;
  cursor: pointer;
  border: none;
}

.fb-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.fb-thanks {
  display: none;
  text-align: center;
  padding: 32px 16px;
  font-size: 16px;
  color: var(--accent-secondary);
  font-weight: 700;
  line-height: 1.8;
}

.fb-thanks.show {
  display: block;
}

/* Mobile modal */
@media (max-width: 768px) {
  .modal-container {
    max-width: 100%;
    max-height: 95vh;
    border-radius: 12px 12px 0 0;
    margin-top: auto;
  }

  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
}

/* --- CF7 Form Styling --- */
.niot-form {
  max-width: 100%;
  padding: 10px;
}

.niot-field {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.niot-field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 6px;
}

.niot-field .required {
  color: var(--accent-primary);
}

/* CF7が生成するspanタグをブロック要素にする */
.wpcf7-form-control-wrap {
  display: block;
  width: 100%;
}

.niot-field input[type="text"],
.niot-field input[type="email"],
.niot-field select,
.niot-field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  color: var(--text-heading);
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.15s;
}

.niot-field input:focus,
.niot-field select:focus,
.niot-field textarea:focus {
  border-color: var(--accent-primary);
}

.niot-submit {
  display: block;
  width: 100%;
  background: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 14px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.niot-submit:hover {
  background: var(--accent-primary-dark);
}

/* 送信成功・エラーメッセージの調整 */
.wpcf7-response-output {
  margin: 20px 0 0 !important;
  padding: 10px !important;
  font-size: 14px;
  border-radius: 6px;
  text-align: center;
}

/* --- Main Page Contact Section --- */
.contact-grid-main {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-title {
  text-align: left;
  margin-left: 0;
}

.contact-lead {
  text-align: left;
  margin-left: 0;
}

.contact-text h2 {
  font-size: 32px;
  margin-bottom: 24px;
}

.contact-badges {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.contact-badges .badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-secondary);
  background: #fff;
  border: 1px solid var(--accent-secondary);
  padding: 4px 12px;
  border-radius: 20px;
}

.contact-form-container {
  padding: 40px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

/* スマホ対応 */
@media (max-width: 768px) {
  .contact-grid-main {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-title,
  .contact-lead {
    text-align: center;
    margin-left: auto;
  }

  .contact-text h2 {
    font-size: 24px;
  }

  .contact-badges {
    justify-content: center;
  }
}