:root {
  --paper: #fbf8f3;
  --ink: #1d1c1a;
  --ink-soft: #4a4741;
  --ink-mute: #6f6a61;
  --brick: #c2452d;
  --amber: #e0a12c;
  --green: #2f6b5a;
  --purple: #6b5b95;
  --sand: #d9d2c6;
  --mist: #f1ece2;
  --line: 1px solid #d9d2c6;
  --radius: 4px;
  --wrap: 1120px;
  --font-head: "Songti SC", "SimSun", "STSong", "Noto Serif SC", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "PingFang SC", monospace;
}

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

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

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

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

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--ink);
  margin: 0;
  line-height: 1.35;
}

p {
  margin: 0 0 1em;
}

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

figure {
  margin: 0;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

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

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  transition: top 0.16s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ========== layout: shell ========== */
.site-header {
  width: 100%;
  border-bottom: var(--line);
  background: var(--paper);
  position: relative;
  z-index: 40;
}

.header-brand {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px 24px 14px;
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  text-decoration: none;
  color: inherit;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.brand-tagline {
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

.site-nav {
  border-top: var(--line);
  background: var(--paper);
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: none;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
}

.nav-list {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 26px;
}

.nav-item {
  display: flex;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 2px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--brick);
  text-decoration: none;
}

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

.site-main {
  display: block;
}

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

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px 24px 8px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--sand);
}

.breadcrumb-item a,
.breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
}

.breadcrumb-item a:hover,
.breadcrumb a:hover {
  color: var(--brick);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--sand);
  margin: 0 6px;
}

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

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

.page-title {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
}

.site-footer {
  margin-top: 72px;
  border-top: var(--line);
  background: var(--paper);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 32px 40px;
}

.footer-brand {
  min-width: 0;
}

.footer-name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 8px;
}

.footer-desc {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
  margin: 0;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer-group {
  min-width: 0;
}

.footer-group-title {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin: 0 0 10px;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--brick);
  text-decoration: underline;
}

.footer-boundary {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 16px;
  font-size: 13px;
  color: var(--ink-mute);
  line-height: 1.7;
  border-top: var(--line);
  padding-top: 20px;
}

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 32px;
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

/* ========== components ========== */
.section-title {
  font-size: 26px;
  line-height: 1.35;
  margin: 0 0 8px;
}

.section-note,
.section-desc,
.section-intro {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0 0 24px;
}

.cat-mark {
  display: inline-block;
  width: 4px;
  height: 18px;
  border-radius: 1px;
  vertical-align: middle;
  flex: none;
}

.cat-amber {
  background: var(--amber);
}

.cat-green {
  background: var(--green);
}

.cat-purple {
  background: var(--purple);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--brick);
  text-decoration: none;
}

.text-link::after {
  content: "→";
  font-size: 13px;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.boundary-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-mute);
  line-height: 1.7;
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: var(--line);
}

.boundary-mark {
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--brick);
  margin-top: 0.7em;
  flex: none;
}

.boundary-list {
  display: grid;
  gap: 0;
}

.boundary-item {
  padding: 16px 0;
  border-top: var(--line);
}

.boundary-item:last-child {
  border-bottom: var(--line);
}

.boundary-title,
.boundary-name {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.boundary-title::before,
.boundary-name::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  background: var(--brick);
  flex: none;
}

.boundary-text {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.faq-item {
  border-top: var(--line);
}

.faq-item:last-of-type {
  border-bottom: var(--line);
}

.faq-question {
  cursor: pointer;
  padding: 16px 32px 16px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  list-style: none;
  line-height: 1.6;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: 20px;
  color: var(--brick);
  line-height: 1;
}

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

.faq-answer {
  padding: 0 0 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.faq-answer p {
  margin: 0 0 8px;
}

.faq-exception {
  font-size: 13px;
  color: var(--ink-mute);
  border-left: 2px solid var(--sand);
  padding-left: 10px;
}

/* ========== pages: home ========== */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 48px;
  padding: 48px 0 56px;
  align-items: start;
}

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

.hero-copy h1 {
  font-size: 34px;
  line-height: 1.3;
  margin: 0 0 20px;
}

.hero-lead {
  font-size: 17px;
  color: var(--ink);
  line-height: 1.7;
  margin: 0 0 14px;
  max-width: 34em;
}

.hero-text {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 12px;
  max-width: 34em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--brick);
  color: #fff;
  border-color: var(--brick);
}

.btn-primary:hover {
  background: #a93922;
  border-color: #a93922;
}

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

.btn-ghost:hover {
  border-color: var(--ink);
}

.hero-media {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hero-figure {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--mist);
  border-radius: var(--radius);
  padding: 5px 10px;
  border-left: 3px solid var(--sand);
}

.tag-amber {
  border-left-color: var(--amber);
}

.tag-green {
  border-left-color: var(--green);
}

.tag-purple {
  border-left-color: var(--purple);
}

.tag-red {
  border-left-color: var(--brick);
}

.entry-bar {
  padding: 40px 0;
  border-top: var(--line);
}

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

.entry-block {
  min-width: 0;
  display: flex;
}

.entry-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 18px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.16s ease;
}

.entry-link:hover {
  border-color: var(--brick);
  text-decoration: none;
}

.entry-name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.entry-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.entry-arrow {
  margin-top: auto;
  font-size: 15px;
  color: var(--brick);
}

.triple-board {
  padding: 40px 0;
  border-top: var(--line);
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

.board-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.board-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: var(--line);
  margin-bottom: 8px;
}

.board-title {
  font-size: 20px;
  line-height: 1.35;
  margin: 0;
}

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

.board-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: var(--line);
  font-size: 14px;
}

.row-name {
  color: var(--ink);
  font-weight: 700;
  min-width: 0;
}

.row-out {
  color: var(--ink-mute);
  font-size: 13px;
  min-width: 0;
}

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

.stage-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: var(--line);
}

.stage-num {
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--brick);
  line-height: 1;
  flex: none;
  min-width: 32px;
}

.stage-name {
  font-size: 14px;
  color: var(--ink);
  min-width: 0;
}

.board-more {
  margin: auto 0 0;
  padding-top: 14px;
}

.scene-matrix {
  padding: 40px 0;
  border-top: var(--line);
}

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

.scene-block {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.scene-block .cat-mark {
  height: 14px;
}

.scene-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  margin-bottom: 4px;
}

.scene-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.scene-name {
  font-size: 18px;
  line-height: 1.4;
  margin: 0;
}

.scene-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.65;
}

.scene-link {
  margin: auto 0 0;
  padding-top: 6px;
}

.boundary-section {
  padding: 40px 0;
  border-top: var(--line);
}

.faq-summary {
  padding: 40px 0;
  border-top: var(--line);
}

.faq-list {
  max-width: 780px;
}

.faq-more {
  margin: 20px 0 0;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 24px 0;
  border-top: var(--line);
}

.related-links-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.related-links-item {
  font-size: 14px;
  color: var(--brick);
  text-decoration: none;
}

.related-links-item:hover {
  text-decoration: underline;
}

/* ========== pages: inner shared ========== */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

.page-layout > .inner-main,
.page-layout > .content-column {
  min-width: 0;
}

.page-aside,
.side-column {
  min-width: 0;
  border-top: 3px solid var(--brick);
  padding-top: 16px;
}

.aside-title {
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.aside-intro {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 14px;
  line-height: 1.7;
}

.aside-links {
  display: flex;
  flex-direction: column;
}

.aside-links li {
  border-top: var(--line);
}

.aside-links a {
  display: block;
  padding: 11px 0;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.aside-links a:hover {
  color: var(--brick);
  text-decoration: underline;
}

.aside-tip {
  margin-top: 20px;
  padding: 16px;
  background: var(--mist);
  border-radius: var(--radius);
}

.aside-tip-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 6px;
}

.aside-tip p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
}

.page-lead {
  font-size: 17px;
  color: var(--ink);
  line-height: 1.7;
  max-width: 34em;
  margin: 0 0 10px;
}

.page-meta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin: 0;
}

.page-description {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.75;
  max-width: 34em;
  margin: 0 0 10px;
}

.content-section {
  margin-bottom: 48px;
}

.section-figure {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  margin-bottom: 20px;
}

.section-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.figure-caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: var(--line);
  line-height: 1.6;
}

/* ========== pages: service catalog ========== */
.page-title {
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.page-title-inner {
  max-width: 34em;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.catalog-table {
  width: 100%;
  min-width: 0;
  font-size: 14px;
}

.catalog-table thead th {
  background: var(--mist);
  text-align: left;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  padding: 12px 14px;
  border-bottom: var(--line);
  white-space: nowrap;
}

.catalog-table tbody td {
  padding: 12px 14px;
  border-bottom: var(--line);
  vertical-align: top;
  color: var(--ink-soft);
  line-height: 1.65;
  word-break: break-word;
}

.catalog-table tbody tr:last-child td {
  border-bottom: none;
}

.catalog-table tbody td:first-child {
  color: var(--ink);
  font-weight: 700;
}

.catalog-table tbody td a {
  color: var(--brick);
  text-decoration: none;
}

.catalog-table tbody td a:hover {
  text-decoration: underline;
}

.catalog-groups {
  margin-bottom: 48px;
}

.group-block {
  border-top: var(--line);
  padding: 18px 0;
}

.group-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.group-mark {
  display: inline-block;
  width: 4px;
  height: 16px;
  border-radius: 1px;
  flex: none;
}

.group-mark-text {
  background: var(--amber);
}

.group-mark-visual {
  background: var(--purple);
}

.group-mark-plan {
  background: var(--green);
}

.group-mark-keep {
  background: var(--brick);
}

.group-title {
  font-size: 18px;
  line-height: 1.4;
  margin: 0;
}

.group-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 10px;
  max-width: 34em;
}

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

.group-item {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px dashed var(--sand);
  font-size: 14px;
}

.group-item:first-child {
  border-top: none;
}

.item-name {
  color: var(--ink);
  font-weight: 700;
  min-width: 0;
}

.item-need {
  color: var(--ink-mute);
  font-size: 13px;
  min-width: 0;
}

.catalog-collab {
  margin-bottom: 48px;
}

.collab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-bottom: 20px;
}

.collab-col {
  min-width: 0;
  padding: 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.collab-subtitle {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: var(--line);
}

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

.collab-item {
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink-soft);
  border-top: 1px dashed var(--sand);
  line-height: 1.65;
}

.collab-item:first-child {
  border-top: none;
}

.catalog-figure {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
}

.catalog-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.catalog-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: var(--line);
  line-height: 1.6;
}

.catalog-compare {
  margin-bottom: 24px;
}

.compare-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

.compare-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  padding: 12px 0;
  border-top: var(--line);
}

.compare-row:last-child {
  border-bottom: var(--line);
}

.compare-pair {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  min-width: 0;
}

.compare-diff {
  font-size: 14px;
  color: var(--ink-soft);
  min-width: 0;
}

/* ========== pages: project stages ========== */
.stage-index {
  margin-bottom: 48px;
}

.stage-index-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0;
  border-top: var(--line);
}

.stage-index-item {
  border-bottom: var(--line);
  min-width: 0;
}

.stage-index-item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 12px 12px 0;
  color: var(--ink);
  text-decoration: none;
}

.stage-index-item a:hover {
  color: var(--brick);
  text-decoration: none;
}

.stage-index-num {
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--brick);
  line-height: 1;
  flex: none;
}

.stage-index-name {
  font-size: 14px;
  min-width: 0;
}

.stage-archive {
  margin-bottom: 48px;
}

.stage-record {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-top: var(--line);
}

.stage-record:last-of-type {
  border-bottom: var(--line);
}

.stage-record-num {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  color: var(--brick);
  line-height: 1.1;
  margin: 0;
}

.stage-record-body {
  min-width: 0;
}

.stage-record-title {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 12px;
}

.stage-record-list {
  margin: 0;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 8px 16px;
  align-items: baseline;
}

.stage-record-list dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.stage-record-list dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  min-width: 0;
}

.review-nodes {
  margin-bottom: 48px;
}

.review-figure {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  margin-bottom: 20px;
}

.review-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.review-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: var(--line);
  line-height: 1.6;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.review-card {
  min-width: 0;
  padding: 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.review-card-title {
  font-size: 16px;
  line-height: 1.4;
  margin: 0 0 6px;
}

.review-card-where {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brick);
  margin: 0 0 8px;
}

.review-card-body {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
}

.stage-rules {
  margin-bottom: 24px;
}

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

.rule-item {
  padding: 16px 0;
  border-top: var(--line);
}

.rule-item:last-child {
  border-bottom: var(--line);
}

.rule-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.rule-body {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
  max-width: 34em;
}

.related-links {
  margin-bottom: 8px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.related-item {
  min-width: 0;
}

.related-item a {
  display: block;
  padding: 14px 16px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.related-item a:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

/* ========== pages: scene index ========== */
.content-column {
  min-width: 0;
}

.scene-filter-section {
  margin-bottom: 32px;
}

.scene-filter-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--paper);
  padding: 8px 0;
  border-top: var(--line);
  border-bottom: var(--line);
}

.scene-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scene-filter-item {
  min-width: 0;
}

.scene-filter-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 14px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
}

.scene-filter-link:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

.scene-filter-link.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  font-weight: 700;
}

.scene-list-section {
  margin-bottom: 48px;
}

.scene-entry {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-top: var(--line);
}

.scene-entry:last-of-type {
  border-bottom: var(--line);
}

.scene-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  min-width: 0;
}

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

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

.scene-body .scene-name {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 10px;
}

.scene-fields {
  margin: 0 0 10px;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 8px 16px;
  align-items: baseline;
}

.scene-fields dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.scene-fields dd {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
  min-width: 0;
}

.scene-more {
  margin: 0;
}

.scene-combo-section {
  margin-bottom: 48px;
}

.combo-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.combo-table {
  width: 100%;
  font-size: 14px;
}

.combo-table thead th {
  background: var(--mist);
  text-align: left;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 12px 14px;
  border-bottom: var(--line);
  white-space: nowrap;
}

.combo-table tbody td {
  padding: 12px 14px;
  border-bottom: var(--line);
  color: var(--ink-soft);
  vertical-align: top;
  line-height: 1.65;
  word-break: break-word;
}

.combo-table tbody tr:last-child td {
  border-bottom: none;
}

.scene-boundary-section {
  margin-bottom: 24px;
}

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

.prep-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.prep-item {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-top: var(--line);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.prep-item:first-child {
  border-top: none;
}

.prep-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--brick);
  flex: none;
  min-width: 18px;
}

.aside-link {
  margin: 0 0 24px;
}

.aside-link a {
  font-size: 14px;
  color: var(--brick);
  text-decoration: none;
}

.aside-link a:hover {
  text-decoration: underline;
}

.aside-nav {
  border-top: var(--line);
  padding-top: 14px;
}

.aside-nav-title {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 8px;
}

.aside-nav-list {
  display: flex;
  flex-direction: column;
}

.aside-nav-list li {
  border-top: 1px dashed var(--sand);
}

.aside-nav-list a {
  display: block;
  padding: 9px 0;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.aside-nav-list a:hover {
  color: var(--brick);
  text-decoration: underline;
}

/* ========== pages: delivery & acceptance ========== */
.page-heading {
  margin-bottom: 24px;
  max-width: 34em;
}

.section {
  margin-bottom: 48px;
}

.delivery-list h2,
.acceptance-tiers h2,
.revision-scope h2,
.archive-retention h2,
.next-links h2 {
  font-size: 26px;
  line-height: 1.35;
  margin: 0 0 8px;
}

.data-table {
  width: 100%;
  font-size: 14px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.data-table .table-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--ink-mute);
  padding: 10px 14px;
  border-bottom: var(--line);
  background: var(--mist);
}

.data-table thead th {
  background: var(--mist);
  text-align: left;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 12px 14px;
  border-bottom: var(--line);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 12px 14px;
  border-bottom: var(--line);
  color: var(--ink-soft);
  vertical-align: top;
  line-height: 1.65;
  word-break: break-word;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody td:first-child {
  color: var(--ink);
  font-weight: 700;
}

.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tier-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 20px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
  border-top: 3px solid var(--sand);
}

.tier-basic {
  border-top-color: var(--green);
}

.tier-full {
  border-top-color: var(--amber);
}

.tier-extended {
  border-top-color: var(--purple);
}

.tier-name {
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 6px;
}

.tier-scene {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 12px;
  line-height: 1.65;
}

.tier-list {
  display: flex;
  flex-direction: column;
  margin-top: auto;
}

.tier-list li {
  padding: 8px 0;
  border-top: 1px dashed var(--sand);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

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

.revision-item {
  padding: 16px 0;
  border-top: var(--line);
}

.revision-item:last-child {
  border-bottom: var(--line);
}

.revision-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.revision-item p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
  max-width: 34em;
}

.archive-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: start;
}

.archive-figure {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
}

.archive-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.archive-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: var(--line);
  line-height: 1.6;
}

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

.archive-body > p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0 0 16px;
}

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

.archive-item {
  padding: 12px 0;
  border-top: var(--line);
}

.archive-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.archive-item p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
}

.next-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.next-link-item {
  min-width: 0;
}

.next-link-item a {
  display: block;
  padding: 14px 16px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.next-link-item a:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

/* ========== pages: faq ========== */
.page-head {
  margin-bottom: 32px;
}

.page-head .page-lead {
  margin-bottom: 10px;
}

.faq-index {
  margin-bottom: 32px;
}

.faq-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.faq-index-item {
  min-width: 0;
}

.faq-index-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: var(--line);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
}

.faq-index-link:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

.faq-media {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  margin-bottom: 40px;
}

.faq-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.faq-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: var(--line);
  line-height: 1.6;
}

.faq-groups {
  margin-bottom: 40px;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group-title {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.faq-policy {
  margin-bottom: 40px;
}

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

.faq-policy-item {
  padding: 14px 0;
  border-top: var(--line);
}

.faq-policy-item:last-child {
  border-bottom: var(--line);
}

.faq-policy-name {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.faq-policy-item p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
  max-width: 34em;
}

.faq-more {
  margin-bottom: 24px;
}

.faq-more-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.faq-more-item {
  min-width: 0;
}

.faq-more-link {
  display: block;
  padding: 14px 16px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.faq-more-link:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

/* ========== pages: cooperation ========== */
.page-title-block {
  margin-bottom: 40px;
  max-width: 34em;
}

.layout-main {
  min-width: 0;
}

.layout-aside {
  min-width: 0;
}

.aside-block {
  margin-bottom: 32px;
  border-top: 3px solid var(--brick);
  padding-top: 16px;
}

.step-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 8px;
}

.step-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: var(--line);
}

.step-item:last-child {
  border-bottom: var(--line);
}

.step-num {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 700;
  color: var(--brick);
  line-height: 1.2;
}

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

.step-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.step-text {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
}

.material-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0 24px;
}

.material-item {
  min-width: 0;
  padding: 14px 0;
  border-top: var(--line);
}

.material-name {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
}

.material-use {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.7;
}

.reading-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.reading-item {
  min-width: 0;
}

.reading-item a {
  display: block;
  padding: 14px 16px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.reading-item a:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

.division-table {
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  margin-bottom: 12px;
}

.division-head {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: var(--mist);
  border-bottom: var(--line);
}

.division-col {
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  min-width: 0;
}

.division-col + .division-col {
  border-left: var(--line);
}

.division-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: var(--line);
}

.division-row:last-child {
  border-bottom: none;
}

.division-cell {
  padding: 10px 12px;
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  min-width: 0;
  word-break: break-word;
}

.division-cell + .division-cell {
  border-left: var(--line);
}

/* ========== pages: 404 ========== */
.site-error .error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 24px;
}

.error-intro {
  margin-bottom: 40px;
  max-width: 34em;
}

.error-code {
  font-family: var(--font-head);
  font-size: 28px;
  color: var(--brick);
  letter-spacing: 0.04em;
  margin: 0 0 10px;
}

.error-intro h1 {
  font-size: 34px;
  line-height: 1.3;
  margin: 0 0 14px;
}

.error-lead {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0 0 20px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 22px;
  background: var(--brick);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
  text-decoration: none;
}

.error-home-link:hover {
  background: #a93922;
  text-decoration: none;
}

.error-guide {
  margin-bottom: 24px;
}

.error-guide h2 {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 8px;
}

.error-guide-note {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 14px;
  max-width: 34em;
}

.error-guide-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.error-guide-list li {
  min-width: 0;
}

.error-guide-list a {
  display: block;
  padding: 14px 16px;
  background: var(--mist);
  border: var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.error-guide-list a:hover {
  border-color: var(--brick);
  color: var(--brick);
  text-decoration: none;
}

/* ========== responsive ========== */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 32px 0 40px;
  }

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

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

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

  .scene-entry {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 20px;
  }

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

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

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

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

@media (max-width: 640px) {
  .header-brand {
    padding: 16px 16px 12px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
  }

  .brand-link {
    gap: 8px;
    flex-wrap: wrap;
    min-width: 0;
  }

  .brand-name {
    font-size: 22px;
  }

  .brand-tagline {
    font-size: 12px;
    width: 100%;
  }

  .site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 12px;
    position: relative;
    border-top: var(--line);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    width: 100%;
    padding: 0 4px 12px;
  }

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

  .nav-item {
    display: block;
    width: 100%;
    border-top: var(--line);
  }

  .nav-link {
    display: flex;
    min-height: 48px;
    width: 100%;
    font-size: 15px;
    border-bottom: none;
  }

  .nav-link.is-current {
    border-bottom: none;
    color: var(--brick);
  }

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

  .inner-main {
    padding-top: 16px;
  }

  .page-title {
    font-size: 26px;
    line-height: 1.35;
  }

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

  .hero-copy h1 {
    font-size: 26px;
    line-height: 1.35;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    gap: 10px;
  }

  .btn {
    flex: 1 1 auto;
  }

  .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .entry-link {
    padding: 14px;
  }

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

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

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

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

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

  .stage-record-num {
    font-size: 24px;
  }

  .stage-record-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .stage-record-list dt {
    margin-top: 6px;
  }

  .scene-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .scene-media img {
    aspect-ratio: 16 / 9;
  }

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

  .scene-fields dt {
    margin-top: 6px;
  }

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

  .scene-filter-list,
  .faq-index-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .scene-filter-item,
  .faq-index-item {
    flex: none;
  }

  .scene-filter-bar {
    position: static;
  }

  .data-table,
  .catalog-table,
  .combo-table {
    display: block;
    width: 100%;
    overflow-x: auto;
  }

  .data-table thead,
  .data-table tbody,
  .data-table tr,
  .data-table th,
  .data-table td {
    display: block;
    width: 100%;
  }

  .data-table thead {
    display: none;
  }

  .data-table tbody tr {
    padding: 12px 0;
    border-bottom: var(--line);
  }

  .data-table tbody tr:last-child {
    border-bottom: none;
  }

  .data-table tbody td {
    border-bottom: none;
    padding: 4px 14px;
  }

  .data-table tbody td:first-child {
    font-size: 15px;
    padding-bottom: 6px;
  }

  .data-table tbody td:not(:first-child)::before {
    content: attr(data-label);
    display: block;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--ink-mute);
    margin-bottom: 2px;
  }

  .division-head,
  .division-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .division-col + .division-col,
  .division-cell + .division-cell {
    border-left: none;
    border-top: var(--line);
  }

  .step-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

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

  .footer-inner {
    padding: 32px 16px 20px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 16px;
  }

  .footer-boundary,
  .footer-copy {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-error .error-main {
    padding: 40px 16px 16px;
  }

  .error-intro h1 {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}