:root {
  --ink: #23262b;
  --ink-soft: #4c525b;
  --ink-mute: #7b828c;
  --line: #e2ded5;
  --line-strong: #cfc9bd;
  --paper: #faf7f1;
  --paper-alt: #f2eee6;
  --card: #ffffff;
  --brand: #2f6b5f;
  --brand-dark: #24544a;
  --brand-soft: #e6efec;
  --accent: #b07d3c;
  --focus: #2f6b5f;
  --shell: 1160px;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-soft: 0 1px 2px rgba(35, 38, 43, 0.05), 0 6px 18px rgba(35, 38, 43, 0.05);
  --shadow-lift: 0 2px 4px rgba(35, 38, 43, 0.07), 0 12px 26px rgba(35, 38, 43, 0.09);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ==========================================================================
   base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0;
}

ul,
ol,
dl,
dd,
figure {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

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

a:hover {
  color: var(--brand-dark);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  font: inherit;
  color: inherit;
}

/* ==========================================================================
   layout
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.section {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.home-main > .section {
  margin-top: 72px;
}

.inner-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.page-layout {
  display: block;
}

/* ==========================================================================
   components · header & navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(250, 247, 241, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(150%) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0;
}

.brand-logo::before {
  content: "";
  width: 10px;
  height: 22px;
  border-radius: 2px;
  background-color: var(--brand);
}

.brand-logo:hover {
  color: var(--brand-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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);
}

.site-nav {
  display: block;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover {
  color: var(--brand-dark);
  background-color: var(--brand-soft);
}

.nav-link.is-current {
  color: var(--brand-dark);
  font-weight: 600;
  background-color: var(--brand-soft);
}

/* ==========================================================================
   components · breadcrumb & page header
   ========================================================================== */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--ink-mute);
}

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

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

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

.breadcrumb-current {
  color: var(--ink);
}

.page-header {
  max-width: 780px;
  padding: 14px 0 8px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
}

.page-description {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

/* ==========================================================================
   components · buttons & links
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn-primary {
  color: #ffffff;
  background-color: var(--brand);
}

.btn-primary:hover {
  color: #ffffff;
  background-color: var(--brand-dark);
  box-shadow: var(--shadow-lift);
}

.btn-ghost {
  color: var(--ink);
  background-color: transparent;
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  color: var(--brand-dark);
  border-color: var(--brand);
  background-color: var(--brand-soft);
}

.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.text-link::after {
  content: " →";
  font-weight: 400;
}

.text-link:hover {
  color: var(--brand-dark);
  border-bottom-color: var(--brand-dark);
}

.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
}

.card-link::after {
  content: " →";
  font-weight: 400;
}

.card-link:hover {
  color: var(--brand-dark);
}

/* ==========================================================================
   components · section head & shared blocks
   ========================================================================== */

.section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
}

.section-desc,
.section-lead,
.section-intro {
  margin-top: 12px;
  font-size: 16px;
  color: var(--ink-soft);
}

.section-lead a,
.section-desc a,
.section-intro a {
  border-bottom: 1px solid var(--line-strong);
}

.section-lead a:hover,
.section-desc a:hover,
.section-intro a:hover {
  border-bottom-color: var(--brand-dark);
}

.section-more {
  margin-top: 24px;
}

.section-footnote {
  margin-top: 26px;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-footnote a {
  margin-right: 18px;
  border-bottom: 1px solid var(--line-strong);
}

.section-footnote a:hover {
  border-bottom-color: var(--brand-dark);
}

.col-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

/* ==========================================================================
   components · figures
   ========================================================================== */

.hero-media,
.section-media,
.direction-media,
.page-media,
.section-figure {
  display: block;
  margin: 0;
  background-color: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-media img,
.section-media img,
.direction-media img,
.page-media img,
.section-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-caption,
.media-caption,
.direction-media figcaption,
.page-media figcaption,
.figure-caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-mute);
  background-color: var(--card);
  border-top: 1px solid var(--line);
}

/* ==========================================================================
   pages · home · hero
   ========================================================================== */

.hero-section {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

.hero-copy {
  max-width: 560px;
}

.hero-eyebrow {
  display: inline-block;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-dark);
  background-color: var(--brand-soft);
  border-radius: 999px;
}

.hero-title {
  margin-top: 18px;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.hero-lead {
  margin-top: 18px;
  font-size: 17px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-point {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

.hero-media {
  aspect-ratio: 4 / 3;
}

/* ==========================================================================
   pages · home · capability grid
   ========================================================================== */

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.capability-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.capability-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}

.capability-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.capability-summary {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.capability-card .card-link {
  margin-top: auto;
  padding-top: 14px;
}

.section-capability .section-media {
  margin-top: 28px;
  aspect-ratio: 21 / 9;
}

/* ==========================================================================
   pages · home · process steps
   ========================================================================== */

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  counter-reset: proc;
}

.process-step {
  position: relative;
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: var(--radius);
}

.process-step .step-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.process-step .step-name {
  margin-top: 8px;
  font-size: 17px;
  font-weight: 600;
}

.process-step .step-fields {
  margin-top: 14px;
}

.process-step .step-fields dt {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-mute);
}

.process-step .step-fields dd {
  margin: 2px 0 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.process-step .step-fields dd:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   pages · home · scenario columns
   ========================================================================== */

.scenario-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}

.scenario-col {
  padding: 26px 24px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scenario-col .col-title {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

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

.audience-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.audience-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.field-name {
  min-width: 96px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.field-value {
  flex: 1 1 220px;
  font-size: 14px;
  color: var(--ink-soft);
}

.scenario-text {
  margin-top: 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

.scenario-col .text-link {
  margin-top: 18px;
}

.section-scenario .section-media {
  margin-top: 28px;
  aspect-ratio: 21 / 9;
}

/* ==========================================================================
   pages · home · prepare list
   ========================================================================== */

.prepare-list {
  border-top: 1px solid var(--line);
}

.prepare-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 160px;
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.prepare-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.prepare-use {
  font-size: 15px;
  color: var(--ink-soft);
}

.prepare-stage {
  justify-self: end;
  padding: 3px 10px;
  font-size: 13px;
  color: var(--brand-dark);
  background-color: var(--brand-soft);
  border-radius: 999px;
  white-space: nowrap;
}

/* ==========================================================================
   pages · home · faq preview
   ========================================================================== */

.faq-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.faq-group {
  display: flex;
  flex-direction: column;
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.faq-group:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
}

.faq-group-title {
  font-size: 17px;
  font-weight: 600;
}

.faq-group-text {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.faq-group .text-link {
  margin-top: auto;
  padding-top: 16px;
}

/* ==========================================================================
   pages · home · scope columns
   ========================================================================== */

.scope-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}

.scope-col,
.scope-column {
  padding: 26px 24px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-col .col-title,
.scope-title {
  padding-bottom: 14px;
  font-size: 18px;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}

.scope-list {
  margin-top: 16px;
}

.scope-item {
  position: relative;
  padding: 9px 0 9px 20px;
  font-size: 15px;
  color: var(--ink-soft);
}

.scope-item::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--brand);
}

.scope-col-boundary .scope-item::before,
.scope-excluded .scope-item::before {
  background-color: var(--accent);
}

/* ==========================================================================
   pages · home · column index
   ========================================================================== */

.index-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.index-item {
  display: block;
}

.index-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  color: var(--ink);
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.index-link:hover {
  color: var(--brand-dark);
  border-color: var(--brand);
  box-shadow: var(--shadow-soft);
}

/* ==========================================================================
   pages · capability
   ========================================================================== */

.capability-directions .section-lead,
.capability-scope .section-lead,
.capability-judge .section-lead,
.capability-boundary .section-lead {
  margin-bottom: 26px;
}

.direction-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 28px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

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

.direction-body {
  min-width: 0;
}

.direction-name {
  font-size: 19px;
  font-weight: 600;
}

.direction-summary {
  margin-top: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.direction-media {
  aspect-ratio: 16 / 10;
}

.capability-scope,
.capability-judge,
.capability-boundary {
  margin-top: 60px;
}

.judge-list {
  border-top: 1px solid var(--line);
}

.judge-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.judge-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.judge-desc {
  font-size: 15px;
  color: var(--ink-soft);
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.boundary-item {
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.boundary-name {
  font-size: 16px;
  font-weight: 600;
}

.boundary-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.boundary-note {
  margin-top: 24px;
  font-size: 15px;
  color: var(--ink-soft);
}

.boundary-note a {
  border-bottom: 1px solid var(--line-strong);
}

/* ==========================================================================
   pages · process
   ========================================================================== */

.section-process-stages,
.section-responsibility,
.section-checkpoints,
.section-adjustments {
  margin-top: 56px;
}

.section-process-stages:first-of-type {
  margin-top: 34px;
}

.stage-list {
  border-top: 1px solid var(--line);
}

.stage-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.stage-index {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--brand);
  line-height: 1.3;
}

.stage-name {
  font-size: 18px;
  font-weight: 600;
}

.stage-desc {
  grid-column: 2;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-responsibility .section-figure {
  margin-bottom: 28px;
  aspect-ratio: 21 / 9;
}

.responsibility-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.responsibility-item {
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.responsibility-name {
  font-size: 17px;
  font-weight: 600;
}

.field-group {
  margin-top: 14px;
}

.field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-mute);
}

.field-group .field-value {
  display: block;
  margin: 2px 0 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.field-group .field-value:last-child {
  margin-bottom: 0;
}

.checkpoint-list {
  border-top: 1px solid var(--line);
}

.checkpoint-item {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 6px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.checkpoint-stage {
  grid-row: span 2;
  align-self: start;
  padding: 3px 10px;
  font-size: 13px;
  color: var(--brand-dark);
  background-color: var(--brand-soft);
  border-radius: 999px;
  white-space: nowrap;
  justify-self: start;
}

.checkpoint-name {
  font-size: 16px;
  font-weight: 600;
}

.checkpoint-note {
  grid-column: 2;
  font-size: 15px;
  color: var(--ink-soft);
}

.adjustment-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.adjustment-item {
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line-strong);
  border-radius: var(--radius);
}

.adjustment-name {
  font-size: 16px;
  font-weight: 600;
}

.adjustment-note {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages · scenario
   ========================================================================== */

.audience-section {
  margin-top: 34px;
}

.audience-section .audience-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 0;
}

.audience-section .audience-item {
  display: block;
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.audience-name {
  font-size: 17px;
  font-weight: 600;
}

.audience-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.audience-field {
  margin-top: 14px;
  padding-top: 14px;
  font-size: 14px;
  border-top: 1px dashed var(--line);
}

.audience-field .field-label {
  margin-right: 8px;
}

.audience-field .field-value {
  color: var(--ink);
}

.match-section {
  margin-top: 60px;
}

.match-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.match-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  gap: 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.match-need {
  min-width: 0;
}

.match-need-title {
  font-size: 16px;
  font-weight: 600;
}

.match-need-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.match-direction {
  padding: 12px 16px;
  background-color: var(--brand-soft);
  border-radius: var(--radius-sm);
}

.match-direction .field-label {
  color: var(--brand-dark);
}

.match-direction .field-value {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-dark);
}

.scenario-figure {
  margin-top: 32px;
  aspect-ratio: 21 / 9;
}

.unsuitable-section,
.nextstep-section {
  margin-top: 60px;
}

.unsuitable-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.unsuitable-item {
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.unsuitable-name {
  font-size: 16px;
  font-weight: 600;
}

.unsuitable-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.nextstep-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.nextstep-item {
  padding: 22px 20px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: var(--radius);
}

.nextstep-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.nextstep-name {
  margin-top: 8px;
  font-size: 16px;
  font-weight: 600;
}

.nextstep-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages · faq
   ========================================================================== */

.page-media {
  margin-top: 26px;
  aspect-ratio: 21 / 9;
}

.faq-group {
  margin-top: 52px;
}

.faq-group:first-of-type {
  margin-top: 34px;
}

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

.faq-item:first-of-type {
  border-top: 1px solid var(--line);
}

.faq-question {
  position: relative;
  padding: 18px 44px 18px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--brand);
}

.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-question:hover {
  color: var(--brand-dark);
}

.faq-answer {
  padding: 0 44px 20px 0;
}

.faq-answer p {
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

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

.faq-answer a {
  border-bottom: 1px solid var(--line-strong);
}

.faq-answer a:hover {
  border-bottom-color: var(--brand-dark);
}

.faq-group-note .note-block {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.faq-group-note .note-block:last-child {
  border-bottom: 1px solid var(--line);
}

.note-title {
  font-size: 16px;
  font-weight: 600;
}

.faq-group-note .note-block p {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.faq-group-note .note-block p a {
  margin-right: 14px;
  border-bottom: 1px solid var(--line-strong);
}

.faq-group-note .note-block p a:hover {
  border-bottom-color: var(--brand-dark);
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-block {
  max-width: 640px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--brand);
}

.error-title {
  margin-top: 16px;
  font-size: 30px;
  font-weight: 700;
}

.error-text {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.error-links {
  margin-top: 56px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.error-link-list a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  color: var(--ink);
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.error-link-list a:hover {
  color: var(--brand-dark);
  border-color: var(--brand);
  box-shadow: var(--shadow-soft);
}

/* ==========================================================================
   components · footer
   ========================================================================== */

.site-footer {
  margin-top: 80px;
  background-color: var(--paper-alt);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 36px;
}

.footer-logo {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.footer-desc {
  margin-top: 12px;
  max-width: 320px;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-group-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.footer-list {
  margin-top: 14px;
}

.footer-list li {
  margin-bottom: 10px;
}

.footer-list a {
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-list a:hover {
  color: var(--brand-dark);
}

.footer-copyright {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px 26px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
}

/* ==========================================================================
   interaction · scroll reveal (enhancement only)
   ========================================================================== */

.reveal {
  animation: reveal-rise 0.5s ease both;
}

@keyframes reveal-rise {
  from {
    transform: translateY(10px);
  }
  to {
    transform: translateY(0);
  }
}

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

  .reveal {
    animation: none;
  }

  .capability-card:hover {
    transform: none;
  }
}

/* ==========================================================================
   responsive · tablet
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-inner {
    gap: 32px;
  }

  .hero-title {
    font-size: 36px;
  }

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

  .index-list,
  .error-link-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .boundary-list,
  .adjustment-list,
  .unsuitable-list,
  .nextstep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .direction-item {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 22px;
  }

  .match-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  }
}

/* ==========================================================================
   responsive · mobile
   ========================================================================== */

@media (max-width: 768px) {
  html {
    scroll-padding-top: 72px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 30;
    background-color: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 14px;
  }

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

  .nav-link {
    display: block;
    padding: 13px 12px;
    font-size: 16px;
  }

  .section,
  .inner-main,
  .hero-section,
  .error-main,
  .footer-inner,
  .footer-copyright {
    padding-left: 16px;
    padding-right: 16px;
  }

  .home-main > .section {
    margin-top: 52px;
  }

  .hero-section {
    padding-top: 30px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-title {
    font-size: 30px;
  }

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

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

  .capability-grid,
  .process-steps,
  .faq-groups,
  .scenario-columns,
  .scope-columns,
  .responsibility-list,
  .audience-section .audience-list,
  .boundary-list,
  .adjustment-list,
  .unsuitable-list,
  .nextstep-list,
  .index-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .prepare-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .prepare-stage {
    justify-self: start;
  }

  .judge-row,
  .match-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .direction-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .stage-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 6px 14px;
  }

  .stage-index {
    font-size: 18px;
  }

  .stage-desc {
    grid-column: 2;
  }

  .checkpoint-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .checkpoint-stage {
    grid-row: auto;
  }

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

  .hero-media,
  .section-capability .section-media,
  .section-scenario .section-media,
  .section-responsibility .section-figure,
  .scenario-figure,
  .page-media,
  .direction-media {
    aspect-ratio: 16 / 10;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding-top: 36px;
  }

  .footer-desc {
    max-width: none;
  }
}

@media (max-width: 420px) {
  .hero-title {
    font-size: 27px;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .faq-question {
    padding-right: 34px;
    font-size: 16px;
  }

  .faq-answer {
    padding-right: 0;
  }
}