:root {
  --paper: #F7F5EF;
  --paper-deep: #EFEBE1;
  --ink: #1F3A34;
  --ink-soft: #2C4A42;
  --ochre: #8A6A3B;
  --muted: #5C6B66;
  --line: #D8D2C4;
  --line-soft: #E6E1D5;
  --white: #FFFDF8;
  --radius: 6px;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Roboto Mono", Consolas, "Courier New", monospace;
  --wrap: 1080px;
  --gutter: 24px;
  --shadow: 0 1px 2px rgba(31, 58, 52, 0.06);
}

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.4;
}

p {
  margin: 0;
}

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

dl,
dd {
  margin: 0;
}

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

a:hover,
a:focus-visible {
  color: var(--ochre);
}

a:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* ==========================================================
   layout — shell
   ========================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
}

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

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter) 72px;
}

.home-main {
  width: 100%;
}

/* ==========================================================
   layout — header / nav
   ========================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--ink);
}

.brand-mark {
  display: inline-block;
  width: 26px;
  height: 26px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background-color: var(--ink);
  box-shadow: inset 0 0 0 5px var(--paper);
}

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

.site-nav {
  display: block;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: inline-block;
  padding: 8px 13px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ochre);
  background-color: var(--paper-deep);
}

.nav-link.is-current {
  color: var(--ochre);
  font-weight: 700;
  border-bottom-color: var(--ochre);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px 10px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--ink);
  border-radius: 1px;
}

/* ==========================================================
   layout — breadcrumb / page header
   ========================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--ochre);
  text-decoration-color: var(--ochre);
}

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

.breadcrumb-current {
  color: var(--ink);
  font-weight: 700;
}

.page-header {
  padding: 20px 0 30px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.page-description {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-title {
  font-size: 30px;
  line-height: 1.35;
  color: var(--ink);
}

.page-lead {
  max-width: 720px;
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

/* ==========================================================
   layout — footer
   ========================================================== */

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

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr);
  gap: 40px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 32px;
}

.footer-brand {
  max-width: 360px;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-summary {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 24px;
}

.footer-group-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ochre);
  margin-bottom: 12px;
}

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

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--ochre);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px var(--gutter);
  font-size: 13px;
  color: var(--muted);
}

/* ==========================================================
   components — shared section furniture
   ========================================================== */

.section-head {
  margin-bottom: 26px;
}

.section-title {
  font-size: 22px;
  color: var(--ink);
}

.section-desc {
  max-width: 700px;
  margin-top: 10px;
  font-size: 15px;
  color: var(--muted);
}

.section-lead,
.section-intro {
  max-width: 760px;
  margin: 10px 0 26px;
  font-size: 15px;
  color: var(--muted);
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.text-link {
  display: inline-block;
  color: var(--ochre);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 4px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

.inline-link {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.inline-link:hover,
.inline-link:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

.figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ==========================================================
   components — buttons
   ========================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  border: 1px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--ochre);
  border-color: var(--ochre);
  color: var(--white);
}

.btn-secondary {
  background-color: var(--white);
  color: var(--ink);
  border-color: var(--ink);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--paper-deep);
  color: var(--ochre);
  border-color: var(--ochre);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--ochre);
  border-color: var(--ochre);
}

/* ==========================================================
   components — figures / media
   ========================================================== */

.hero-figure,
.matrix-figure,
.catalog-figure,
.entry-figure,
.section-media,
.section-figure,
.notice-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  overflow: hidden;
}

.hero-figure img,
.matrix-figure img,
.catalog-figure img,
.entry-figure img,
.section-media img,
.section-figure img,
.notice-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--paper-deep);
}

.matrix-figure img,
.catalog-figure img,
.entry-figure img,
.section-media img,
.section-figure img,
.notice-figure img {
  aspect-ratio: 16 / 9;
}

.matrix-figure .figure-caption,
.catalog-figure figcaption,
.entry-figure figcaption,
.section-media figcaption,
.section-figure .figure-caption,
.notice-figure .figure-caption {
  padding: 12px 16px 14px;
  margin-top: 0;
  border-top: 1px solid var(--line-soft);
}

/* ==========================================================
   components — data tables
   ========================================================== */

.data-table,
.scope-table {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  font-size: 15px;
}

.data-table caption,
.scope-caption {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  border-bottom: 1px solid var(--line-soft);
}

.data-table th,
.data-table td,
.scope-table th,
.scope-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}

.data-table thead th,
.scope-table thead th {
  background-color: var(--paper-deep);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr:last-child td,
.scope-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover,
.scope-table tbody tr:hover {
  background-color: var(--paper);
}

.cell-index {
  width: 88px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  white-space: nowrap;
}

/* ==========================================================
   components — faq / details
   ========================================================== */

.faq-item,
.example-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  margin-bottom: 10px;
}

.faq-question,
.example-summary {
  position: relative;
  display: block;
  padding: 14px 44px 14px 16px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after,
.example-summary::after {
  content: "+";
  position: absolute;
  top: 12px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--ochre);
}

.faq-item[open] .faq-question::after,
.example-item[open] .example-summary::after {
  content: "–";
}

.faq-question:hover,
.example-summary:hover {
  color: var(--ochre);
}

.faq-answer {
  padding: 0 16px 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

.example-body {
  padding: 0 16px 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ==========================================================
   pages — home
   ========================================================== */

.hero {
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 1fr);
  gap: 44px;
  align-items: start;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 52px var(--gutter) 56px;
}

.hero-copy {
  min-width: 0;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 34px;
  line-height: 1.32;
  color: var(--ink);
}

.hero-lead {
  max-width: 620px;
  margin-top: 16px;
  font-size: 16px;
  color: var(--ink-soft);
}

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

.hero-panel {
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  box-shadow: var(--shadow);
}

.panel-title {
  font-size: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.panel-list {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.panel-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.panel-label {
  font-size: 14px;
  color: var(--muted);
}

.panel-value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-align: right;
}

.hero-panel .hero-figure {
  margin-top: 16px;
}

.hero-panel .hero-figure img {
  aspect-ratio: 4 / 3;
}

.service-matrix,
.process-stages,
.notices,
.faq,
.site-index {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 52px var(--gutter);
  border-bottom: 1px solid var(--line-soft);
}

.home-main .site-index {
  border-bottom: 0;
}

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

.matrix-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.matrix-row:hover {
  background-color: var(--paper-deep);
}

.matrix-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ochre);
}

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

.matrix-name {
  font-size: 18px;
}

.matrix-target {
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
}

.matrix-entry {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  white-space: nowrap;
}

.matrix-entry:hover,
.matrix-entry:focus-visible {
  color: var(--ochre);
  border-color: var(--ochre);
}

.matrix-figure {
  margin-top: 26px;
}

.stage-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.stage-track .stage-node {
  position: relative;
  padding: 22px 20px 4px 0;
  border-right: 1px solid var(--line-soft);
}

.stage-track .stage-node:last-child {
  border-right: 0;
  padding-right: 0;
}

.stage-track .stage-node:not(:first-child) {
  padding-left: 20px;
}

.stage-track .stage-node::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--ochre);
}

.stage-track .stage-node:not(:first-child)::before {
  left: 20px;
}

.stage-track .stage-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  margin-bottom: 8px;
}

.stage-track .stage-name {
  font-size: 18px;
  margin-bottom: 12px;
}

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

.stage-items li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.stage-items li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 5px;
  height: 5px;
  background-color: var(--line);
  border-radius: 50%;
}

.home-main .notice-groups {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.home-main .notice-group {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
}

.home-main .notice-date {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ochre);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 12px;
}

.home-main .notice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.home-main .notice-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
}

.home-main .notice-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.home-main .notice-link:hover,
.home-main .notice-link:focus-visible {
  color: var(--ochre);
  text-decoration-color: var(--ochre);
}

.home-main .notice-scope {
  font-size: 13px;
  color: var(--muted);
}

.home-main .notice-scope::before {
  content: "涉及范围：";
  color: var(--line);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, 1fr);
  gap: 36px;
  align-items: start;
}

.faq-column {
  min-width: 0;
}

.glossary {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
}

.glossary-title {
  font-size: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}

.glossary-list {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 14px;
  align-items: baseline;
}

.glossary-term {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.glossary-desc {
  font-size: 14px;
  color: var(--muted);
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.index-grid .index-cell {
  padding: 20px 18px 20px 0;
  border-right: 1px solid var(--line-soft);
}

.index-grid .index-cell:last-child {
  border-right: 0;
  padding-right: 0;
}

.index-grid .index-cell:not(:first-child) {
  padding-left: 18px;
}

.index-grid .index-name {
  font-size: 17px;
  margin-bottom: 8px;
}

.index-link {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.index-link:hover,
.index-link:focus-visible {
  color: var(--ochre);
  text-decoration-color: var(--ochre);
}

.index-grid .index-desc {
  font-size: 14px;
  color: var(--muted);
}

/* ==========================================================
   pages — service catalog
   ========================================================== */

.catalog-overview,
.service-items,
.entry-and-materials,
.notes {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--line-soft);
}

.notes {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.catalog-figure {
  margin: 0 0 26px;
}

.service-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.service-items .section-title,
.service-items .section-lead {
  margin-bottom: 0;
}

.service-items .section-lead {
  margin: 10px 0 6px;
}

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

.service-item-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}

.item-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  flex: 0 0 auto;
}

.item-meta {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 10px 18px;
  align-items: baseline;
}

.item-meta dt {
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
}

.item-meta dd {
  font-size: 15px;
  color: var(--ink-soft);
}

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

.entry-item {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 8px 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.entry-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.entry-target {
  font-size: 14px;
  color: var(--ink-soft);
}

.entry-prep {
  font-size: 14px;
  color: var(--muted);
}

.entry-figure {
  margin-top: 26px;
}

.notes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.notes-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink-soft);
}

.notes-item::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 0;
  width: 6px;
  height: 6px;
  background-color: var(--line);
  border-radius: 50%;
}

.notes-tail {
  margin-top: 22px;
  font-size: 15px;
}

/* ==========================================================
   pages — cooperation
   ========================================================== */

.process-overview,
.stage-details,
.communication,
.process-faq {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--line-soft);
}

.process-faq {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.process-overview .section-media {
  margin-bottom: 28px;
}

.stage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.stage-strip .stage-node {
  padding: 22px 20px 4px 0;
  border-right: 1px solid var(--line-soft);
}

.stage-strip .stage-node:last-child {
  border-right: 0;
  padding-right: 0;
}

.stage-strip .stage-node:not(:first-child) {
  padding-left: 20px;
}

.stage-strip .stage-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  margin-bottom: 8px;
}

.stage-strip .stage-name {
  font-size: 17px;
  margin-bottom: 10px;
}

.stage-summary {
  font-size: 14px;
  color: var(--muted);
}

.stage-details {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.stage-details .section-title,
.stage-details .section-intro {
  margin-bottom: 0;
}

.stage-details .section-intro {
  margin: 10px 0 4px;
}

.stage-detail {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
}

.stage-detail-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line-soft);
}

.stage-detail-head .stage-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  flex: 0 0 auto;
}

.stage-detail-title {
  font-size: 18px;
}

.stage-detail-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 24px;
  padding: 20px 22px 22px;
}

.stage-column {
  min-width: 0;
}

.stage-column-title {
  font-size: 15px;
  color: var(--ochre);
  margin-bottom: 10px;
}

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

.stage-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

.stage-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 6px;
  height: 1px;
  background-color: var(--ochre);
}

.communication-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

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

.communication-title {
  font-size: 17px;
  margin-bottom: 10px;
}

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

.section-note {
  margin-top: 22px;
  font-size: 15px;
  color: var(--muted);
}

.section-note a {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.section-note a:hover,
.section-note a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

.process-faq .faq-list {
  display: flex;
  flex-direction: column;
}

/* ==========================================================
   pages — notices
   ========================================================== */

.notice-groups,
.change-scope,
.material-updates,
.check-guide {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--line-soft);
}

.check-guide {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.notice-groups .notice-group {
  margin-bottom: 20px;
}

.notice-groups .notice-group:last-child {
  margin-bottom: 0;
}

.notice-groups .notice-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) minmax(120px, auto);
  gap: 6px 18px;
  align-items: baseline;
  padding: 4px 0;
}

.notice-groups .notice-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  padding: 0;
  border: 0;
  margin: 0;
  white-space: nowrap;
}

.notice-groups .notice-scope {
  text-align: right;
}

.scope-table {
  margin-top: 4px;
}

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

.update-item {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(0, 2fr);
  gap: 8px 20px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.update-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

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

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: guide;
}

.guide-step {
  position: relative;
  padding: 18px 20px 18px 62px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  counter-increment: guide;
}

.guide-step::before {
  content: counter(guide, decimal-leading-zero);
  position: absolute;
  top: 18px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ochre);
}

.step-title {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.step-text a {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.step-text a:hover,
.step-text a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

.notice-figure {
  margin-top: 8px;
}

/* ==========================================================
   pages — feedback
   ========================================================== */

.feedback-paths,
.info-checklist,
.response-note,
.feedback-examples {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--line-soft);
}

.feedback-examples {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.feedback-paths .section-figure {
  margin-bottom: 26px;
}

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

.path-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 4px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.path-index {
  grid-row: 1 / span 3;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ochre);
}

.path-name {
  font-size: 17px;
}

.path-target {
  font-size: 14px;
  color: var(--muted);
}

.path-target a {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.path-target a:hover,
.path-target a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

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

.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: checklist;
}

.checklist-item {
  position: relative;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
  counter-increment: checklist;
}

.checklist-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ochre);
}

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

.checklist-text strong {
  color: var(--ink);
}

.note-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

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

.note-name {
  font-size: 17px;
  margin-bottom: 10px;
}

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

.section-footnote {
  margin-top: 22px;
  font-size: 15px;
  color: var(--muted);
}

.section-footnote a {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.section-footnote a:hover,
.section-footnote a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

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

.index-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.index-list .index-item {
  padding: 20px 18px 20px 0;
  border-right: 1px solid var(--line-soft);
}

.index-list .index-item:last-child {
  border-right: 0;
  padding-right: 0;
}

.index-list .index-item:not(:first-child) {
  padding-left: 18px;
}

/* ==========================================================
   pages — 404
   ========================================================== */

.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px var(--gutter) 72px;
}

.error-hero {
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ochre);
  margin-bottom: 12px;
}

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

.error-text {
  max-width: 640px;
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 24px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  background-color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background-color: var(--ochre);
  border-color: var(--ochre);
  color: var(--white);
}

.error-paths {
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.error-paths-title {
  font-size: 22px;
  margin-bottom: 20px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
}

.error-path-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--white);
}

.error-path-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
  white-space: nowrap;
}

.error-path-link:hover,
.error-path-link:focus-visible {
  color: var(--ochre);
  text-decoration-color: var(--ochre);
}

.error-path-note {
  font-size: 14px;
  color: var(--muted);
}

.error-tip-title {
  font-size: 22px;
  margin-bottom: 12px;
}

.error-tip-text {
  max-width: 720px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ==========================================================
   responsive
   ========================================================== */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 1fr);
    gap: 32px;
  }

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

  .index-grid .index-cell:nth-child(3n),
  .index-list .index-item:nth-child(3n) {
    border-right: 0;
    padding-right: 0;
  }

  .index-grid .index-cell:nth-child(3n + 1),
  .index-list .index-item:nth-child(3n + 1) {
    padding-left: 0;
  }
}

@media (max-width: 900px) {
  .stage-track,
  .stage-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stage-track .stage-node:nth-child(2n),
  .stage-strip .stage-node:nth-child(2n) {
    border-right: 0;
    padding-right: 0;
  }

  .stage-track .stage-node:nth-child(2n + 1),
  .stage-strip .stage-node:nth-child(2n + 1) {
    padding-left: 0;
  }

  .stage-track .stage-node:nth-child(2n + 1)::before {
    left: 0;
  }

  .stage-track .stage-node:nth-child(-n + 2),
  .stage-strip .stage-node:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line-soft);
  }

  .stage-track .stage-node:nth-child(n + 3),
  .stage-strip .stage-node:nth-child(n + 3) {
    padding-top: 22px;
  }

  .communication-list,
  .note-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  .faq-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 18px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .site-nav {
    order: 4;
    width: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--line-soft);
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    font-size: 16px;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
  }

  .nav-link.is-current {
    border-bottom-color: var(--line-soft);
    background-color: var(--paper-deep);
  }

  .breadcrumb {
    padding-top: 18px;
  }

  .page-header {
    padding: 16px 0 22px;
    margin-bottom: 30px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-lead {
    font-size: 15px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px var(--gutter) 36px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .service-matrix,
  .process-stages,
  .notices,
  .faq,
  .site-index {
    padding: 36px var(--gutter);
  }

  .matrix-row {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 6px 14px;
    align-items: start;
  }

  .matrix-entry {
    grid-column: 2;
    justify-self: start;
    margin-top: 6px;
  }

  .matrix-index {
    grid-row: 1 / span 2;
  }

  .stage-track,
  .stage-strip {
    grid-template-columns: minmax(0, 1fr);
  }

  .stage-track .stage-node,
  .stage-strip .stage-node {
    padding: 20px 0 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .stage-track .stage-node:last-child,
  .stage-strip .stage-node:last-child {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .stage-track .stage-node:not(:first-child),
  .stage-strip .stage-node:not(:first-child) {
    padding-left: 0;
  }

  .stage-track .stage-node::before,
  .stage-track .stage-node:not(:first-child)::before {
    left: 0;
  }

  .glossary-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .glossary-desc {
    margin-bottom: 10px;
  }

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

  .index-grid .index-cell,
  .index-list .index-item {
    padding: 16px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .index-grid .index-cell:last-child,
  .index-list .index-item:last-child {
    border-bottom: 0;
  }

  .index-grid .index-cell:not(:first-child),
  .index-list .index-item:not(:first-child) {
    padding-left: 0;
  }

  .catalog-overview,
  .service-items,
  .entry-and-materials,
  .notes,
  .process-overview,
  .stage-details,
  .communication,
  .process-faq,
  .notice-groups,
  .change-scope,
  .material-updates,
  .check-guide,
  .feedback-paths,
  .info-checklist,
  .response-note,
  .feedback-examples {
    padding-bottom: 32px;
    margin-bottom: 32px;
  }

  .item-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .item-meta dt {
    margin-top: 8px;
  }

  .entry-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 16px 0;
  }

  .stage-detail-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 18px;
  }

  .stage-detail-head {
    padding: 16px 18px;
  }

  .communication-list,
  .note-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .notice-groups .notice-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .notice-groups .notice-scope {
    text-align: left;
  }

  .update-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .guide-step {
    padding: 16px 18px 16px 56px;
  }

  .guide-step::before {
    top: 16px;
    left: 18px;
  }

  .path-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 4px 14px;
  }

  .checklist-item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .data-table,
  .scope-table {
    font-size: 14px;
  }

  .data-table th,
  .data-table td,
  .scope-table th,
  .scope-table td {
    padding: 10px 12px;
  }

  .error-main {
    padding: 40px var(--gutter) 56px;
  }

  .error-title {
    font-size: 24px;
  }

  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    padding: 32px var(--gutter) 24px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 23px;
  }

  .section-title {
    font-size: 20px;
  }

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .error-path-item {
    flex-direction: column;
    gap: 4px;
  }
}

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

  a,
  .btn {
    transition: none;
  }
}