:root {
  /* Color */
  --color-navy-900: #102033;
  --color-navy-800: #1B3048;
  --color-blueprint-700: #244B74;
  --color-signal-500: #2F6FED;
  --color-signal-600: #2459C7;
  --color-teal-500: #28A7A1;

  --color-ink-950: #111820;
  --color-gray-700: #46515D;
  --color-gray-500: #74808C;
  --color-gray-300: #CDD4DB;
  --color-gray-100: #F2F5F7;
  --color-warm-white: #FAFAF8;
  --color-white: #FFFFFF;

  --font-sans: "Pretendard Variable", Pretendard, Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono-label: Inter, "Pretendard Variable", sans-serif;

  --text-display: 2.5rem;
  --text-h1: clamp(2.375rem, 3.4vw + 1rem, 3.25rem);
  --text-h2: clamp(2rem, 2.2vw + 1rem, 2.25rem);
  --text-h3: clamp(1.5rem, 1vw + 1rem, 1.75rem);
  --text-h4: clamp(1.1875rem, 0.4vw + 1rem, 1.3125rem);
  --text-lead: clamp(1.125rem, 0.4vw + 1rem, 1.3125rem);
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-label: 0.75rem;

  --container-max: 75rem;
  /* 1200px */
  --container-wide: 90rem;
  /* 1440px */
  --reading-width: 47.5rem;
  /* 760px */
  --container-pad: clamp(20px, 5vw, 40px);

  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-28: 7rem;
  --space-36: 9rem;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  --shadow-subtle: 0 1px 2px rgba(16, 32, 51, .04), 0 8px 24px rgba(16, 32, 51, .06);

  --motion-fast: 160ms;
  --motion-default: 240ms;
  --motion-slow: 420ms;
  --easing-standard: cubic-bezier(0.2, 0.8, 0.2, 1);

  --bg-page: var(--color-warm-white);
  --bg-surface: var(--color-white);
  --bg-mist: var(--color-gray-100);
  --bg-navy: var(--color-navy-900);
  --text-primary: var(--color-ink-950);
  --text-secondary: var(--color-gray-700);
  --text-tertiary: var(--color-gray-500);
  --line: var(--color-gray-300);
}

:root[data-theme="dark"] {
  --bg-page: #0B1420;
  --bg-surface: #0F1B2B;
  --bg-mist: #14233568;
  --text-primary: #EDF1F5;
  --text-secondary: #B9C3CE;
  --text-tertiary: #8B98A6;
  --line: rgba(255, 255, 255, .14);
  --bg-navy: #0A1420;
  --shadow-subtle: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-page: #0B1420;
    --bg-surface: #0F1B2B;
    --bg-mist: #14233568;
    --text-primary: #EDF1F5;
    --text-secondary: #B9C3CE;
    --text-tertiary: #8B98A6;
    --line: rgba(255, 255, 255, .14);
    --bg-navy: #0A1420;
    --shadow-subtle: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 100px;
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-sans);
}

.num {
  font-family: var(--font-mono-label);
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(47, 111, 237, .35);
  outline-offset: 3px;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono-label);
  font-size: var(--text-label);
  font-weight: 650;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-signal-500);
}

.eyebrow::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--color-signal-500);
  display: inline-block;
}

h2.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin-top: var(--space-4);
  text-wrap: balance;
}

p.lead {
  font-size: var(--text-lead);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-top: var(--space-5);
  max-width: var(--reading-width);
}

.section-header {
  max-width: none;
}

/* ---------- Buttons & Links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: 650;
  line-height: 1;
  border-radius: var(--radius-md);
  padding: 14px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--motion-default) var(--easing-standard), transform var(--motion-fast) var(--easing-standard), border-color var(--motion-default);
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-signal-500);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-signal-600);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-navy-900);
  border-color: var(--color-navy-900);
}

:root[data-theme="dark"] .btn-secondary {
  color: var(--text-primary);
  border-color: var(--line);
}

@media (prefers-color-scheme:dark) {
  :root:not([data-theme="light"]) .btn-secondary {
    color: var(--text-primary);
    border-color: var(--line);
  }
}

.btn-secondary:hover {
  background: var(--bg-mist);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-body);
  font-weight: 650;
  color: var(--color-signal-500);
}

.text-link .arrow {
  transition: transform var(--motion-fast) var(--easing-standard);
  display: inline-block;
}

.text-link:hover .arrow {
  transform: translateX(4px);
}

/* ---------- NAV ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-page) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px var(--container-pad);
  max-width: var(--container-max);
  margin: 0 auto;
}

.wordmark {
  font-size: clamp(15px, 2vw, 18px);
  font-weight: 700;
  letter-spacing: -.01em;
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  white-space: nowrap;
  flex: none;
}

.wordmark small {
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-tertiary);
  letter-spacing: .02em;
}

/* 상담 신청 버튼과 같은 높이로 맞춘다.
   버튼 높이 = 상하 padding 14px + line-height 16px + 테두리 2px = 46px (데스크톱),
   모바일에서는 .btn의 min-height 44px가 적용된다. */
.wordmark img {
  height: 46px;
  width: auto;
  display: block;
  align-self: flex-start;
}

.footer-brand .wordmark img {
  height: 36px;
}

nav.menu {
  display: flex;
  gap: 36px;
}

nav.menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

nav.menu a:hover {
  color: var(--color-signal-500);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  position: relative;
  width: 16px;
  height: 1px;
  background: var(--text-primary);
  display: block;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--text-primary);
  transition: transform var(--motion-fast) var(--easing-standard);
}

.nav-toggle span::before {
  top: -5px;
}

.nav-toggle span::after {
  top: 5px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- HERO ---------- */
.hero-wrap {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 120px);
  opacity: .5;
  -webkit-mask-image: linear-gradient(180deg, black, transparent 88%);
  mask-image: linear-gradient(180deg, black, transparent 88%);
}

.hero {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(56px, 12vw, 112px) var(--container-pad) clamp(56px, 12vw, 112px);
  display: grid;
  grid-template-columns: 1fr;
}

.hero-copy {
  max-width: var(--reading-width);
}

.hero-copy h1 {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.015em;
  margin-top: 20px;
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: normal;
  transition: color var(--motion-default) var(--easing-standard);
}

.hero-copy h1:hover {
  color: var(--color-signal-500);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 40px;
  flex-wrap: wrap;
}

/* ---------- SECTIONS ---------- */
section {
  padding: clamp(56px, 10vw, 112px) 0;
}

section.compact {
  padding: clamp(40px, 7vw, 80px) 0;
}

.mist {
  background: var(--bg-mist);
}

/* Problem list */
.problem-list {
  margin-top: 56px;
  max-width: var(--container-max);
  border-top: 1px solid var(--line);
}

.problem-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.problem-row .idx {
  font-family: var(--font-mono-label);
  font-size: 14px;
  color: var(--text-tertiary);
  padding-top: 2px;
}

.problem-row p {
  font-size: var(--text-body-lg);
  line-height: 1.7;
  margin: 0;
  color: var(--text-primary);
  max-width: var(--reading-width);
}

.problem-conclusion {
  margin-top: 40px;
  font-size: var(--text-lead);
  color: var(--text-primary);
  max-width: none;
}

#about .lead {
  max-width: none;
}

.problem-conclusion b {
  color: var(--color-signal-500);
  font-weight: 650;
}

/* Definition system map */
.system-map {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}

.system-map-copy p {
  font-size: var(--text-body-lg);
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 36ch;
}

.map-flow {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  padding: 8px 32px;
  box-shadow: var(--shadow-subtle);
}

.map-step {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
}

.map-step:not(:last-child) {
  border-bottom: 1px solid var(--line);
}

.map-step .step-idx {
  font-family: var(--font-mono-label);
  font-size: 13px;
  color: var(--color-signal-500);
  font-weight: 650;
  width: 28px;
  flex: none;
}

.map-step .step-label {
  font-size: var(--text-body-lg);
  font-weight: 650;
  color: var(--text-primary);
}

.map-step .step-desc {
  font-size: 13.5px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* Profile / expertise */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  margin-top: 64px;
}

.profile-copy p {
  font-size: var(--text-body-lg);
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0 0 22px;
}

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

.expertise-list {
  display: flex;
  flex-direction: column;
}

.expertise-item {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.expertise-item:last-child {
  border-bottom: 1px solid var(--line);
}

.expertise-item h4 {
  font-size: var(--text-h4);
  font-weight: 650;
  letter-spacing: -.005em;
}

.expertise-item p {
  font-size: var(--text-small);
  color: var(--text-tertiary);
  margin: 8px 0 0;
  line-height: 1.6;
}

.diff-strip {
  margin-top: 80px;
  padding-top: 64px;
  border-top: 1px solid var(--line);
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.diff-card h4 {
  font-size: 16.5px;
  font-weight: 650;
  line-height: 1.4;
}

.diff-card p {
  font-size: 13.5px;
  color: var(--text-tertiary);
  margin: 10px 0 0;
  line-height: 1.6;
}

/* Process */
.process {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.process-step {
  position: relative;
  padding: 0 28px 0 0;
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 20px;
  right: 0;
  width: 28px;
  height: 1px;
  background: var(--line);
}

.process-num {
  font-family: var(--font-mono-label);
  font-size: 13px;
  font-weight: 650;
  color: var(--color-signal-500);
}

.process-step h4 {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.3;
  margin-top: 14px;
}

.process-step p {
  font-size: 13.5px;
  color: var(--text-tertiary);
  margin-top: 10px;
  line-height: 1.3;
}

/* Services */
.service-track+.service-track {
  margin-top: 72px;
}

.track-head {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: start;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.track-tag {
  font-family: var(--font-mono-label);
  font-size: 13px;
  font-weight: 650;
  line-height: 32px;
  text-align: center;
  color: var(--bg-surface);
  background: var(--color-navy-900);
  border-radius: 999px;
}

[data-theme="dark"] .track-tag {
  background: var(--color-signal-500);
  color: var(--color-white);
}

.track-title {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.2;
}

.track-desc {
  font-size: 14.5px;
  color: var(--text-tertiary);
  line-height: 1.45;
  margin-top: 6px;
  max-width: 60ch;
}

/* 시작점(A)은 닫힌 격자 카드, 구축 층(B)은 열린 리스트로 렌더해
   "셋 중 택일"과 "필요한 만큼 조합"을 형태로 구분한다. */
.capability-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.capability-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-left: 20px;
  border-left: 2px solid var(--line);
}

.capability-card h3 {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.15;
}

.capability-card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
  flex: 1;
}

.cap-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.cap-layer {
  font-family: var(--font-mono-label);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .04em;
  color: var(--text-tertiary);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 9px;
  white-space: nowrap;
}

.service-note {
  margin-top: 32px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-mist);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-note p {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
  max-width: 92ch;
}

.service-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  background: var(--bg-surface);
  padding: clamp(24px, 4vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-number {
  font-family: var(--font-mono-label);
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 650;
}

.service-card h3 {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.15;
}

.service-card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.3;
  margin: 0;
  flex: 1;
}

.service-card.is-recommended {
  box-shadow: inset 3px 0 0 var(--color-signal-500);
}

.service-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.badge-rec {
  font-family: var(--font-mono-label);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .04em;
  color: var(--color-signal-500);
  border: 1px solid var(--color-signal-500);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}

.service-meta {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.service-meta div {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-tertiary);
}

.service-meta .k {
  font-family: var(--font-mono-label);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding-top: 2px;
}

.service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

/* Fit */
.fit-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.fit-col h3 {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.3;
}

.fit-list {
  margin-top: 18px;
}

.fit-list li {
  position: relative;
  padding: 15px 0 15px 30px;
  border-top: 1px solid var(--line);
  font-size: var(--text-body);
  line-height: 1.65;
  color: var(--text-secondary);
}

.fit-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.fit-list li::before {
  position: absolute;
  left: 2px;
  top: 15px;
  font-weight: 700;
}

.fit-col.yes .fit-list li::before {
  content: "✓";
  color: var(--color-signal-500);
}

.fit-col.no .fit-list li::before {
  content: "×";
  color: var(--text-tertiary);
}

/* Founder */
.founder {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.founder .role {
  font-family: var(--font-mono-label);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.founder h4 {
  font-size: var(--text-h4);
  font-weight: 650;
  margin-top: 10px;
}

.founder p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 12px 0 0;
  max-width: 64ch;
}

/* Insights / Blog */
.insight-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.insight-card {
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.insight-cat {
  font-family: var(--font-mono-label);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-teal-500);
}

.insight-card h4 {
  font-size: 19px;
  font-weight: 650;
  line-height: 1.4;
}

.insight-card p {
  font-size: 14px;
  color: var(--text-tertiary);
  margin: 0;
  line-height: 1.6;
}

.insight-meta {
  font-size: 12.5px;
  color: var(--text-tertiary);
  display: flex;
  gap: 10px;
  align-items: center;
}

.insight-meta .status {
  color: var(--color-signal-500);
  font-weight: 650;
}

.blog-cta {
  margin-top: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 4vw, 32px) clamp(24px, 4vw, 36px);
  flex-wrap: wrap;
  background: var(--bg-surface);
}

.blog-cta p {
  font-size: var(--text-body-lg);
  color: var(--text-secondary);
  margin: 0;
  max-width: 44ch;
}

/* 인사이트 카드는 이제 글 상세로 가는 링크다. */
.insight-card h4 {
  transition: color var(--motion-default) var(--easing-standard);
}

.insight-card:hover h4 {
  color: var(--color-signal-500);
}

.insights-empty {
  margin-top: 56px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: var(--text-body-lg);
  color: var(--text-tertiary);
}

/* ---------- Insight article ---------- */
.post {
  padding: clamp(48px, 8vw, 88px) 0 clamp(56px, 10vw, 112px);
}

.post-header {
  max-width: var(--reading-width);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--line);
}

.post-title {
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.015em;
  margin-top: var(--space-4);
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: normal;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: var(--space-6);
  font-family: var(--font-mono-label);
  font-size: 12.5px;
  color: var(--text-tertiary);
}

/* 본문 서체는 읽기 폭(760px)에 맞춰 행간을 넉넉히 준다. */
.prose {
  max-width: var(--reading-width);
  margin-top: var(--space-10);
  font-size: var(--text-body-lg);
  line-height: 1.85;
  color: var(--text-secondary);
}

.prose>*:first-child {
  margin-top: 0;
}

.prose h2 {
  font-size: var(--text-h3);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--text-primary);
  margin: var(--space-12) 0 var(--space-4);
  word-break: keep-all;
}

.prose h3 {
  font-size: var(--text-h4);
  font-weight: 650;
  line-height: 1.4;
  color: var(--text-primary);
  margin: var(--space-10) 0 var(--space-3);
  word-break: keep-all;
}

.prose p {
  margin: 0 0 var(--space-6);
}

.prose strong {
  color: var(--text-primary);
  font-weight: 650;
}

.prose a {
  color: var(--color-signal-500);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 전역에서 ul의 list-style을 none으로 지운 상태라 본문에서만 되살린다. */
.prose ul,
.prose ol {
  margin: 0 0 var(--space-6);
  padding-left: 1.25rem;
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  border-left: 3px solid var(--color-signal-500);
  color: var(--text-primary);
}

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

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .875em;
  background: var(--bg-mist);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.prose pre {
  background: var(--bg-mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  overflow-x: auto;
}

.prose pre code {
  background: none;
  padding: 0;
}

.prose img {
  border-radius: var(--radius-md);
  margin: var(--space-8) 0;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: var(--space-12) 0;
}

.post-footer {
  max-width: var(--reading-width);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--line);
}

/* Contact */
.contact-section {
  background: var(--bg-navy);
  color: #fff;
}

.contact-section .eyebrow {
  color: #7FA6FF;
}

.contact-section h2.section-title {
  color: #fff;
}

.contact-section p.lead {
  color: rgba(255, 255, 255, .72);
}

.contact-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 72px;
  margin-top: 28px;
}

.contact-detail {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.contact-detail-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 9px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}

.contact-detail-row span {
  font-family: var(--font-mono-label);
  font-size: 11.5px;
  color: rgba(255, 255, 255, .5);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.contact-detail-row a,
.contact-detail-row div.val {
  font-size: 15px;
  color: #fff;
}

.contact-detail-row a:hover {
  color: #7FA6FF;
}

form.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(22px, 4vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: 13px;
  color: var(--color-gray-700);
  font-weight: 500;
}

.field input,
.field select,
.field textarea {
  background: #fff;
  color: var(--color-ink-950);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 400;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-300);
  outline: none;
  min-height: 44px;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--color-signal-500);
}

.field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-note {
  font-size: 12.5px;
  color: var(--color-gray-500);
}

.form-error {
  font-size: 13px;
  color: #E0473A;
  display: none;
}

.form-error.show {
  display: block;
}

.btn-primary[disabled] {
  opacity: .6;
  cursor: not-allowed;
}

.contact-form-wrap {
  position: relative;
}

.form-success {
  display: none;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(32px, 6vw, 48px) clamp(22px, 4vw, 36px);
  text-align: center;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  min-height: 360px;
}

.form-success.show {
  display: flex;
}

.form-success .check {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-signal-500);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
}

.form-success h4 {
  font-size: var(--text-h4);
  font-weight: 700;
  color: var(--color-ink-950);
}

.form-success p {
  font-size: 14.5px;
  color: var(--text-secondary);
  margin: 0;
  max-width: 40ch;
}

/* Footer */
footer.footer {
  background: var(--bg-page);
  color: var(--text-tertiary);
  padding: clamp(48px, 8vw, 80px) var(--container-pad) 32px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: clamp(28px, 5vw, 48px);
}

.footer-brand p {
  font-size: 13.5px;
  line-height: 1.7;
  max-width: 32ch;
  margin-top: 14px;
  color: var(--text-tertiary);
}

.footer-col h5 {
  font-family: var(--font-mono-label);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-tertiary);
  margin-bottom: 16px;
  font-weight: 650;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--color-signal-500);
}

.footer-legal {
  max-width: var(--container-max);
  margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 70;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--color-signal-500);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-subtle);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--motion-default) var(--easing-standard), transform var(--motion-default) var(--easing-standard), background var(--motion-default);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-signal-600);
}

@media (max-width:767px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

/* ---------- Responsive ---------- */
@media (max-width:1023px) {
  .system-map {
    grid-template-columns: 1fr;
  }

  .profile-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .process {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 40px;
  }

  .process-step:nth-child(2)::after {
    display: none;
  }

  .service-grid,
  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .nav-toggle {
    display: flex;
  }

  nav.menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 60;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-subtle);
    padding: 8px var(--container-pad) 16px;
  }

  nav.menu.open {
    display: flex;
  }

  nav.menu a {
    padding: 14px 4px;
    font-size: 16px;
    border-top: 1px solid var(--line);
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  nav.menu a:first-child {
    border-top: none;
  }

  .nav-actions {
    gap: 8px;
  }

  .nav-actions .btn-primary {
    padding: 11px 16px;
    font-size: 14.5px;
  }

  /* 모바일 버튼 높이는 .btn의 min-height(44px)로 결정된다. */
  .wordmark img {
    height: 44px;
  }
}

@media (max-width:767px) {
  .hero-actions .btn {
    width: 100%;
  }

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

  .process {
    grid-template-columns: 1fr;
    row-gap: 32px;
  }

  .process-step::after {
    display: none;
  }

  .service-grid,
  .capability-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .blog-cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width:479px) {
  .wordmark small {
    display: none;
  }

  /* 초소형 화면에서는 로고(가로세로비 3.5:1)가 버튼·햄버거와 함께 한 줄에
     들어가지 않으므로, 높이 일치보다 레이아웃 유지를 우선한다. */
  .wordmark img {
    height: 40px;
  }
}

@media (max-width:360px) {
  .wordmark img {
    height: 36px;
  }

  .diff-card h4,
  .service-card h3,
  .capability-card h3 {
    font-size: 15.5px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}