/* =========================================================
   BASE
   ========================================================= */
:root {
  --color-primary: #0F5E5C;
  --color-primary-dark: #0A4A48;
  --color-accent: #D97B4A;
  --color-bg: #F6F2EA;
  --color-text: #2B2B2B;
  --color-line: #C8A47A;
  --color-white: #FFFFFF;
  --color-light: #FDFCF8;
  --color-muted: #6B6B6B;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(43, 43, 43, 0.08);
  --shadow-md: 0 4px 12px rgba(43, 43, 43, 0.1);
  --shadow-lg: 0 8px 24px rgba(43, 43, 43, 0.12);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

p {
  margin-bottom: 1.2em;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =========================================================
   LAYOUT
   ========================================================= */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand a {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

.site-nav .nav-list {
  display: flex;
  gap: 4px;
  align-items: center;
}

.site-nav .nav-list li a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-nav .nav-list li a:hover {
  color: var(--color-primary);
}

.site-nav .nav-list li a.is-current {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  padding: 8px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.home-main {
  padding-bottom: 0;
}

.inner-main {
  padding-top: 24px;
  padding-bottom: 64px;
}

/* =========================================================
   COMPONENTS
   ========================================================= */
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 44px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

/* Breadcrumb */
.breadcrumb {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-primary);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  color: var(--color-line);
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* Page header */
.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 720px;
  line-height: 1.7;
}

/* Section headings */
.section-heading {
  margin-bottom: 32px;
}

.section-heading h2,
.section-title,
section > h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.section-heading p,
.section-desc {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 640px;
}

.section-desc {
  margin-bottom: 24px;
}

/* Section link */
.section-link {
  margin-top: 24px;
  text-align: center;
}

.section-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 0;
}

.section-link a:hover {
  color: var(--color-accent);
}

/* =========================================================
   HOME PAGE
   ========================================================= */
/* Hero */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 64px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-content h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--color-primary);
  background-color: rgba(15, 94, 92, 0.08);
  border: 1px solid rgba(15, 94, 92, 0.2);
  border-radius: 20px;
}

.hero-figure {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Service table section */
.service-table-section {
  padding: 64px 0;
  border-top: 1px solid var(--color-line);
}

.table-wrap,
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.service-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-table thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  white-space: nowrap;
}

.service-table tbody th {
  background-color: var(--color-light);
  color: var(--color-text);
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  font-size: 15px;
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}

.service-table tbody td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
}

.service-table tbody tr:last-child th,
.service-table tbody tr:last-child td {
  border-bottom: none;
}

.service-table tbody tr {
  transition: background-color var(--transition-fast);
}

.service-table tbody tr:hover {
  background-color: rgba(200, 164, 122, 0.08);
}

.table-note {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 16px;
  line-height: 1.6;
}

.table-note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Scenario cards */
.scenario-cards-section {
  padding: 64px 0;
  border-top: 1px solid var(--color-line);
}

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

.scenario-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.scenario-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 20px 20px 8px;
}

.scenario-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin: 0 20px 16px;
  flex-grow: 1;
}

.scenario-card a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 20px 20px;
}

.scenario-card a:hover {
  color: var(--color-accent);
}

/* Process overview */
.process-overview-section {
  padding: 64px 0;
  border-top: 1px solid var(--color-line);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.process-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.process-step .step-input,
.process-step .step-output {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.process-step .step-input {
  position: relative;
  padding-left: 18px;
}

.process-step .step-input::before {
  content: "入";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent);
}

.process-step .step-output {
  position: relative;
  padding-left: 18px;
}

.process-step .step-output::before {
  content: "出";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
}

/* Quality summary */
.quality-summary-section {
  padding: 64px 0;
  border-top: 1px solid var(--color-line);
}

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

.quality-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--color-accent);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.quality-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.quality-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.quality-item p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Insights preview */
.insights-preview-section {
  padding: 64px 0;
  border-top: 1px solid var(--color-line);
}

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

.insight-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.insight-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.insight-card .insight-question {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.insight-card .insight-conclusion {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 16px;
}

.insight-card a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.insight-card a:hover {
  color: var(--color-accent);
}

/* CTA banner */
.cta-banner {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  margin: 64px 0;
}

.cta-banner h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-banner .btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.cta-banner .btn-primary:hover {
  background-color: var(--color-light);
  box-shadow: var(--shadow-md);
}

.cta-banner .btn-secondary {
  color: var(--color-white);
  border-color: var(--color-white);
}

.cta-banner .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

/* =========================================================
   INNER PAGES
   ========================================================= */
/* Service page */
.service-overview-table {
  margin-bottom: 56px;
}

.overview-title,
#overview-title,
#terms-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-terms-list > h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-terms-list > .section-desc {
  margin-bottom: 32px;
}

.service-term-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

.service-term-item h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.term-definition {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.6;
}

.term-explanation {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.term-example {
  background-color: var(--color-light);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 16px;
  border-left: 2px solid var(--color-accent);
}

.term-example h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.term-example p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.term-related {
  font-size: 14px;
  color: var(--color-muted);
}

.term-related a {
  color: var(--color-primary);
  font-weight: 600;
  margin-right: 16px;
}

.term-related a:hover {
  color: var(--color-accent);
}

.service-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 40px 0;
  box-shadow: var(--shadow-md);
}

.service-media img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.service-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 12px 16px;
  background-color: var(--color-white);
  text-align: center;
}

/* Scenarios page */
.scenario-index {
  margin-bottom: 56px;
}

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

.index-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.index-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.index-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 16px;
}

.index-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.index-card a:hover {
  color: var(--color-accent);
}

.scenario-detail-list {
  margin-bottom: 56px;
}

.scenario-block {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 2fr 3fr;
}

.scenario-media {
  overflow: hidden;
}

.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.scenario-content {
  padding: 32px;
}

.scenario-content > h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.challenge-box,
.solution-box {
  margin-bottom: 20px;
}

.challenge-box h4,
.solution-box h4,
.service-link h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.challenge-box h4 {
  color: var(--color-accent);
}

.solution-box h4 {
  color: var(--color-primary);
}

.challenge-box p,
.solution-box p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.service-link {
  background-color: var(--color-light);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.service-link h4 {
  color: var(--color-text);
  margin-bottom: 10px;
}

.service-link p {
  font-size: 14px;
  margin-bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.service-link a {
  color: var(--color-primary);
  font-weight: 600;
}

.service-link a:hover {
  color: var(--color-accent);
}

/* Process page */
.process-timeline {
  margin-bottom: 56px;
}

.content-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}

.content-media img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 10px 16px;
  background-color: var(--color-white);
  text-align: center;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.timeline-step {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.timeline-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.timeline-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.timeline-step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

.process-detail-list {
  margin-bottom: 56px;
}

.detail-block {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-accent);
}

.detail-block h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.detail-block p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 10px;
  position: relative;
  padding-left: 20px;
}

.detail-block p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.faq-accordion {
  margin-bottom: 56px;
}

.faq-accordion details {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  transition: box-shadow var(--transition-normal);
}

.faq-accordion details:hover {
  box-shadow: var(--shadow-md);
}

.faq-accordion summary {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition-fast);
}

.faq-accordion summary::-webkit-details-marker {
  display: none;
}

.faq-accordion summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-accordion details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

.faq-accordion details[open] summary {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line);
}

.faq-accordion details p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  padding: 20px 24px;
  margin-bottom: 0;
  background-color: var(--color-light);
}

/* Quality page */
.deliverable-checklist {
  margin-bottom: 56px;
}

.deliverable-checklist > h2,
.quality-control-steps > h2,
.acceptance-principles > h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
}

.deliverable-checklist > p,
.quality-control-steps > p,
.acceptance-principles > p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 640px;
}

.deliverable-checklist table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.deliverable-checklist thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  white-space: nowrap;
}

.deliverable-checklist tbody td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  line-height: 1.6;
}

.deliverable-checklist tbody tr {
  transition: background-color var(--transition-fast);
}

.deliverable-checklist tbody tr:hover {
  background-color: rgba(200, 164, 122, 0.08);
}

.deliverable-checklist tbody tr:last-child td {
  border-bottom: none;
}

.quality-step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.quality-step-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-accent);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.quality-step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.quality-step-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.quality-step-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.quality-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.quality-media img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.quality-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 10px 16px;
  background-color: var(--color-white);
  text-align: center;
}

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

.principle-list li {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--color-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.principle-list li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.principle-list h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.principle-list p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Insights page */
.topic-index {
  margin-bottom: 48px;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.topic-tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 24px;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 44px;
}

.topic-tag:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.article-list {
  margin-bottom: 48px;
}

.article-list .insight-card {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 0;
  padding: 0;
  overflow: hidden;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.article-list .insight-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.insight-media {
  overflow: hidden;
}

.insight-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.insight-body {
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
}

.insight-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.insight-body .insight-question {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.insight-body .insight-summary {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
  flex-grow: 1;
}

.insight-body .insight-conclusion {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 16px;
  background-color: var(--color-light);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  border-left: 3px solid var(--color-primary);
}

.insight-body .insight-conclusion strong {
  color: var(--color-primary);
}

.insight-link a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.insight-link a:hover {
  color: var(--color-accent);
}

/* About page */
.work-principles {
  margin-bottom: 56px;
}

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

.principle-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.principle-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.principle-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.principle-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.collaboration-steps {
  margin-bottom: 56px;
}

.collaboration-step-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.collaboration-step {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.collaboration-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.collaboration-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.step-content p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.collaboration-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.collaboration-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.collaboration-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 10px 16px;
  background-color: var(--color-white);
  text-align: center;
}

.boundary-list {
  margin-bottom: 56px;
}

.boundary-item-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.boundary-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--color-accent);
}

.boundary-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.boundary-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Related links */
.related-links {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
}

.related-links > h2,
.related-links .section-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links ul li a {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 24px;
  color: var(--color-primary);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  min-height: 44px;
}

.related-links ul li a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

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

.related-link-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: block;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.related-link-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.related-link-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.related-link-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

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

.related-link-name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.related-link-desc {
  display: block;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* Inline related links */
.related-links-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  margin-right: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  min-height: 44px;
  padding: 8px 0;
}

.related-links-item:hover {
  color: var(--color-accent);
}

/* =========================================================
   404 PAGE
   ========================================================= */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 64px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 28px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.error-btn:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  margin-bottom: 0;
  max-width: 280px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-link-group h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-link-group ul li {
  margin-bottom: 10px;
}

.footer-link-group ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-fast);
}

.footer-link-group ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1024px) {
  .hero-section {
    gap: 32px;
  }

  .scenario-cards,
  .insight-cards,
  .quality-items,
  .quality-step-grid,
  .principle-card-grid,
  .principle-list {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .scenario-block {
    grid-template-columns: 1fr;
  }

  .scenario-media img {
    aspect-ratio: 16 / 7;
  }

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

  .insight-media img {
    aspect-ratio: 16 / 6;
  }

  .collaboration-step-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 64px;
    flex-wrap: wrap;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: 100%;
    position: relative;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-line);
    padding: 8px 0;
    gap: 0;
  }

  .site-nav .nav-list.is-open {
    display: flex;
  }

  .site-nav .nav-list li {
    width: 100%;
  }

  .site-nav .nav-list li a {
    display: block;
    padding: 14px 16px;
    border-bottom: none;
    border-left: 3px solid transparent;
    font-size: 15px;
  }

  .site-nav .nav-list li a.is-current {
    border-left-color: var(--color-primary);
    background-color: rgba(15, 94, 92, 0.06);
  }

  .site-main,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 0;
    gap: 32px;
  }

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

  .hero-figure {
    aspect-ratio: 16 / 10;
  }

  .service-table-section,
  .scenario-cards-section,
  .process-overview-section,
  .quality-summary-section,
  .insights-preview-section {
    padding: 48px 0;
  }

  .scenario-cards,
  .insight-cards,
  .quality-items,
  .quality-step-grid,
  .principle-card-grid,
  .principle-list,
  .index-card-grid,
  .related-link-list,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .process-steps,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 40px 24px;
    margin: 48px 0;
  }

  .cta-banner h2 {
    font-size: 22px;
  }

  .page-header {
    margin-bottom: 28px;
  }

  .page-title {
    font-size: 28px;
  }

  .service-term-item {
    padding: 24px;
  }

  .scenario-content {
    padding: 24px;
  }

  .detail-block {
    padding: 24px;
  }

  .faq-accordion summary {
    padding: 16px 20px;
    padding-right: 44px;
    font-size: 15px;
  }

  .faq-accordion details p {
    padding: 16px 20px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

  .boundary-item-list {
    grid-template-columns: 1fr;
  }

  .collaboration-step-list {
    grid-template-columns: 1fr;
  }

  .related-links ul {
    flex-direction: column;
    gap: 8px;
  }

  .related-links ul li a {
    width: 100%;
    justify-content: center;
  }

  .topic-list {
    flex-wrap: wrap;
  }

  .topic-tag {
    flex: 1 1 auto;
    justify-content: center;
  }

  .error-main {
    min-height: 50vh;
    padding: 40px 16px;
  }

  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 48px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .table-wrap,
  .table-wrapper {
    margin: 0 -8px;
    padding: 0 8px;
  }

  .service-table thead th,
  .service-table tbody th,
  .service-table tbody td,
  .deliverable-checklist thead th,
  .deliverable-checklist tbody td {
    padding: 12px 14px;
    font-size: 14px;
  }

  .hero-tags {
    gap: 8px;
  }

  .hero-tag {
    padding: 5px 12px;
    font-size: 12px;
  }

  .scenario-card h3,
  .scenario-card p,
  .scenario-card a {
    margin-left: 16px;
    margin-right: 16px;
  }

  .process-step,
  .quality-item,
  .timeline-step,
  .detail-block,
  .principle-card,
  .boundary-item,
  .index-card,
  .insight-card {
    padding: 20px 16px;
  }

  .section-heading h2,
  .section-title,
  section > h2 {
    font-size: 22px;
  }

  .page-title {
    font-size: 26px;
  }
}

/* =========================================================
   ANIMATIONS (enhancement only)
   ========================================================= */
@media (prefers-reduced-motion: no-preference) {
  .scenario-card,
  .insight-card,
  .process-step,
  .quality-item,
  .timeline-step,
  .quality-step-card,
  .principle-card,
  .index-card,
  .related-link-card {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  }
}

/* =========================================================
   MOBILE NAV TOGGLE STATE
   ========================================================= */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}