:root {
  --bg: #f4f5f3;
  --surface: #ffffff;
  --ink: #1b1e1c;
  --ink-soft: #5f6663;
  --line: #d9dcd8;
  --ok: #2f7d5a;
  --warn: #8a6f3c;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --shell: 1140px;
  --radius: 6px;
  --gap: 40px;
}

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

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
}

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

p {
  margin: 0;
}

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

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

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

figure {
  margin: 0;
}

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

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

.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;
}

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

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

.site-main {
  display: block;
}

.inner-main {
  padding: 32px 0 64px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: var(--gap);
  align-items: start;
}

.page-layout__main,
.layout-main {
  min-width: 0;
}

.page-layout__aside,
.layout-side {
  min-width: 0;
}

.page-content {
  min-width: 0;
}

.page-sidebar {
  min-width: 0;
}

/* ============================================================
   header / navigation  (locked shell)
   ============================================================ */

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

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}

.brand {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

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

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.site-nav__link {
  display: inline-block;
  padding: 8px 11px;
  font-size: 14px;
  color: var(--ink-soft);
  border-radius: var(--radius);
  white-space: nowrap;
}

.site-nav__link:hover {
  color: var(--ink);
  background: var(--bg);
}

.site-nav__link.is-current {
  color: var(--ink);
  font-weight: 600;
  background: var(--bg);
}

.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  font-size: 14px;
  color: #fff;
  background: var(--ok);
  border-radius: var(--radius);
  white-space: nowrap;
}

.header-cta:hover {
  background: #286a4c;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.mobile-nav {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav__list {
  padding: 8px 24px 16px;
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 4px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.mobile-nav__link.is-current {
  color: var(--ok);
  font-weight: 600;
}

/* ============================================================
   components
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
}

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

.btn--primary:hover {
  background: #286a4c;
}

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

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

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  border-radius: 4px;
  white-space: nowrap;
}

.tag--ok {
  color: var(--ok);
  background: rgba(47, 125, 90, 0.1);
  border: 1px solid rgba(47, 125, 90, 0.28);
}

.tag--warn {
  color: var(--warn);
  background: rgba(138, 111, 60, 0.1);
  border: 1px solid rgba(138, 111, 60, 0.3);
}

.tag--mid {
  color: var(--warn);
  background: rgba(138, 111, 60, 0.1);
  border: 1px solid rgba(138, 111, 60, 0.3);
}

.link-more {
  display: inline-block;
  font-size: 14px;
  color: var(--ok);
}

.link-more:hover {
  text-decoration: underline;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

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

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

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

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

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

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

.breadcrumb__item a:hover {
  color: var(--ok);
}

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

.page-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 34px;
  line-height: 1.25;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 62ch;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-updated,
.update-time,
.page-hero__update,
.page-hero__updated,
.page-title__time {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.section {
  margin-bottom: 56px;
}

.section__head,
.section-head {
  margin-bottom: 22px;
}

.section__title,
.section-title {
  font-size: 22px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.section__intro,
.section__lead,
.section-lead {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 68ch;
}

.section__foot {
  margin-top: 20px;
  font-size: 14px;
}

.section__foot a {
  color: var(--ok);
}

.section__foot a:hover {
  text-decoration: underline;
}

.module-index,
.scene-block__index,
.stage-item__num,
.stage-item__no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.module-title {
  font-size: 22px;
  margin-bottom: 14px;
}

.module-subtitle {
  font-size: 17px;
  line-height: 1.5;
  margin: 22px 0 10px;
}

.module-text {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 16px;
  max-width: 62ch;
}

.module-links {
  margin-top: 18px;
  font-size: 14px;
}

.module-links a {
  color: var(--ok);
}

.module-links a:hover {
  text-decoration: underline;
}

.module-figure {
  margin: 18px 0;
}

.module-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.module-figure figcaption,
.scene-block__media figcaption,
.compare-figure figcaption,
.media figcaption,
.flow-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.deliverable-list {
  display: grid;
  gap: 8px;
}

.deliverable-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--ink-soft);
}

.deliverable-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
}

.list-dot {
  display: grid;
  gap: 8px;
  margin: 10px 0 16px;
}

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

.list-dot li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-soft);
}

.media {
  margin: 24px 0;
}

.media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media--wide img {
  aspect-ratio: 21 / 9;
}

/* sidebar blocks (shared inner pages) */

.sidebar-block,
.aside-block,
.aside-card,
.side-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.sidebar-block__title,
.sidebar-title,
.aside-block__title,
.aside-card__title,
.side-block__title {
  font-size: 15px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.sidebar-links,
.aside-links,
.side-links {
  display: grid;
  gap: 10px;
}

.sidebar-links a,
.aside-links a,
.side-links__link {
  display: block;
  font-size: 14px;
  color: var(--ink-soft);
}

.sidebar-links a:hover,
.aside-links a:hover,
.side-links__link:hover {
  color: var(--ok);
}

.sidebar-note,
.sidebar-status,
.aside-block__text {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.aside-block__text .tag {
  margin-left: 6px;
}

/* ============================================================
   pages — index
   ============================================================ */

.site-home .hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 48px 0;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--gap);
  align-items: start;
}

.hero__eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ok);
  margin-bottom: 12px;
}

.hero__title {
  font-size: 34px;
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero__lead {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 22px;
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.hero__figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero__panel {
  background: #1f2321;
  color: #e6e9e5;
  border-radius: var(--radius);
  padding: 20px;
}

.panel__cmd {
  font-family: var(--mono);
  font-size: 13px;
  color: #8fd0ad;
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.panel__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.panel__no {
  font-family: var(--mono);
  font-size: 13px;
  color: #8fd0ad;
}

.panel__name {
  font-size: 15px;
  color: #ffffff;
}

.panel__desc {
  grid-column: 2 / 3;
  font-size: 13px;
  color: #a9b1ac;
}

.panel__row .tag {
  grid-row: 1 / 2;
  grid-column: 3 / 4;
}

.panel__foot {
  margin-top: 14px;
  font-size: 13px;
  color: #a9b1ac;
}

.home-main .page-layout {
  padding-top: 48px;
}

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

.flow-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.flow-card--wide {
  grid-column: span 2;
}

.flow-card--tall .flow-card__figure img {
  aspect-ratio: 3 / 4;
}

.flow-card__link {
  display: block;
  height: 100%;
  padding: 16px;
}

.flow-card__figure {
  margin-bottom: 12px;
  overflow: hidden;
  border-radius: 4px;
}

.flow-card__figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.flow-card:hover {
  border-color: var(--ink-soft);
}

.flow-card:hover .flow-card__figure img {
  transform: scale(1.02);
}

.flow-card__title {
  font-size: 17px;
  margin-bottom: 6px;
}

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

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

.combo-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.combo-card__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--warn);
  margin-bottom: 10px;
}

.combo-card__title {
  font-size: 17px;
  margin-bottom: 12px;
}

.combo-card__items {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
}

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

.combo-card__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background: var(--ok);
}

.combo-card__text {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

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

.scenario-col {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.scenario-col__title {
  font-size: 17px;
  margin-bottom: 10px;
}

.scenario-col__need {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.scenario-col__label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.scenario-col__list {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}

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

.scenario-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background: var(--ok);
}

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

.stage-track .stage-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ok);
  border-radius: var(--radius);
  padding: 18px;
}

.stage-track .stage-item__title {
  font-size: 16px;
  margin-bottom: 10px;
}

.stage-track .stage-item__text {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.stage-track .stage-item__out {
  font-size: 13px;
  color: var(--ink-soft);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.notice-list {
  display: grid;
  gap: 14px;
}

.notice-item {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.notice-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.notice-item__meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.notice-item__text {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 6px;
}

.faq-brief {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 48px 0;
}

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

.faq-brief__item {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.faq-brief__q {
  font-size: 16px;
  margin-bottom: 8px;
}

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

.contact-brief {
  padding: 48px 0 56px;
}

.contact-brief .section__head {
  margin-bottom: 20px;
}

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

.brief-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.brief-card__title {
  font-size: 16px;
  margin-bottom: 8px;
}

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

/* ============================================================
   pages — objects
   ============================================================ */

.object-entry {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.material-section,
.stage-map {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.material-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 12px;
}

.material-col {
  min-width: 0;
}

.stage-list {
  display: grid;
  gap: 16px;
  margin-top: 14px;
}

.stage-map .stage-item {
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-name {
  font-size: 16px;
  margin-bottom: 6px;
}

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

/* ============================================================
   pages — compare
   ============================================================ */

.page-head {
  margin-bottom: 32px;
}

.page-head__summary {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  max-width: 68ch;
}

.page-head__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

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

.dimension-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.dimension-item__title {
  font-size: 17px;
  margin-bottom: 10px;
}

.dimension-item__desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.dimension-item__ask {
  font-size: 13px;
  color: var(--warn);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

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

.compare-col {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.compare-col__title {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.compare-col__list {
  margin: 0;
}

.compare-col__list dt {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 12px;
}

.compare-col__list dd {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--ink);
}

.compare-col__note {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-soft);
}

.compare-figure {
  margin: 24px 0 0;
}

.compare-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.advice-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.advice-card__title {
  font-size: 17px;
  margin-bottom: 12px;
}

.advice-card__list {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

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

.advice-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background: var(--ok);
}

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

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

.link-group__item a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
}

.link-group__item a:hover {
  border-color: var(--ok);
  color: var(--ok);
}

/* ============================================================
   pages — scenarios
   ============================================================ */

.page-title {
  padding: 0;
}

.page-title__inner {
  max-width: 68ch;
}

.page-title__summary {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.page-title__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

.scene-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.scene-block__head {
  margin-bottom: 12px;
}

.scene-block__lead {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 18px;
  max-width: 62ch;
}

.scene-block__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  gap: 24px;
  align-items: start;
}

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

.scene-block__text h3 {
  font-size: 16px;
  margin: 18px 0 8px;
}

.scene-block__text h3:first-child {
  margin-top: 0;
}

.scene-block__text p {
  font-size: 15px;
  color: var(--ink-soft);
}

.scene-block__media {
  margin: 0;
}

.scene-block__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scene-map {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.scene-map__head {
  margin-bottom: 18px;
}

.scene-map__lead {
  font-size: 15px;
  color: var(--ink-soft);
  margin-top: 8px;
}

.scene-map__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

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

.scene-map__col h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

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

.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border: 1px solid var(--line);
  vertical-align: top;
}

.data-table th {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg);
  color: var(--ink);
}

.data-table td {
  color: var(--ink-soft);
}

.scene-map__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.scene-map__foot a {
  color: var(--ok);
}

.scene-map__foot a:hover {
  text-decoration: underline;
}

.status-list {
  display: grid;
  gap: 10px;
}

/* ============================================================
   pages — process
   ============================================================ */

.page-hero {
  padding: 0 0 32px;
}

.page-hero__inner {
  max-width: 68ch;
}

.page-hero__lead {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

.flow-intro {
  margin-bottom: 44px;
}

.flow-intro__inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--gap);
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.flow-figure {
  margin: 0;
}

.flow-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.flow-intro__text {
  min-width: 0;
}

.flow-intro__text p {
  font-size: 15px;
  color: var(--ink-soft);
  margin-top: 12px;
}

.stage-list > .section-title {
  margin-bottom: 22px;
}

.stage-list .stage-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.stage-list .stage-item__title {
  font-size: 20px;
  margin-bottom: 10px;
}

.stage-list .stage-item__desc {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 68ch;
}

.stage-item__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

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

.stage-col__title {
  font-size: 15px;
  margin-bottom: 10px;
}

.stage-col__list {
  display: grid;
  gap: 8px;
}

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

.stage-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background: var(--ok);
}

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

.stage-item__note a {
  color: var(--ok);
}

.stage-item__note a:hover {
  text-decoration: underline;
}

.stage-table-section {
  margin-bottom: 44px;
}

.stage-table-wrap {
  overflow-x: auto;
  margin-top: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-table {
  min-width: 620px;
  font-size: 14px;
}

.stage-table__caption {
  padding: 14px 16px;
  text-align: left;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

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

.stage-table th {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg);
}

.stage-table td {
  color: var(--ink-soft);
}

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

.related-section {
  margin-bottom: 20px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.related-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.related-item a {
  display: block;
  font-size: 16px;
  color: var(--ok);
  margin-bottom: 6px;
}

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

.related-item p {
  font-size: 14px;
  color: var(--ink-soft);
}

/* ============================================================
   pages — faq
   ============================================================ */

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

.faq-group .section-title {
  margin-bottom: 8px;
}

.faq-group .section-lead {
  margin-bottom: 18px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 20px;
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  padding: 14px 0;
  font-family: var(--mono);
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}

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

.faq-item__question::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 18px;
  color: var(--ok);
}

.faq-item[open] .faq-item__question::after {
  content: "–";
}

.faq-item__answer {
  padding: 0 0 18px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

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

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

.related-links__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.related-links__list a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-links__list a:hover {
  border-color: var(--ok);
  color: var(--ok);
}

/* ============================================================
   pages — contact
   ============================================================ */

.content-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.content-block__title {
  font-size: 22px;
  margin-bottom: 10px;
}

.content-block__intro {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 20px;
  max-width: 68ch;
}

.checklist-group {
  margin-bottom: 22px;
}

.checklist-group:last-of-type {
  margin-bottom: 0;
}

.checklist-group__title {
  font-size: 16px;
  margin-bottom: 6px;
}

.checklist-group__desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.checklist {
  display: grid;
  gap: 8px;
}

.checklist li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  color: var(--ink-soft);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--ok);
  border-bottom: 2px solid var(--ok);
  transform: rotate(-45deg);
}

.agenda {
  display: grid;
  gap: 16px;
}

.agenda__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.agenda__index {
  grid-row: 1 / 3;
  font-family: var(--mono);
  font-size: 20px;
  color: var(--ok);
  line-height: 1.3;
}

.agenda__title {
  font-size: 16px;
}

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

.reading-list {
  display: grid;
  gap: 14px;
}

.reading-list__item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.reading-list__item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.reading-list__link {
  display: inline-block;
  font-size: 16px;
  color: var(--ok);
  margin-bottom: 4px;
}

.reading-list__link:hover {
  text-decoration: underline;
}

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

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

.note-card {
  padding: 18px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.note-card__title {
  font-size: 16px;
  margin-bottom: 8px;
}

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

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

.error-main {
  padding: 64px 0 72px;
}

.error-hero {
  max-width: 640px;
  margin-bottom: 48px;
}

.error-code {
  font-family: var(--mono);
  font-size: 64px;
  line-height: 1;
  color: var(--ok);
  margin-bottom: 16px;
}

.error-hero h1 {
  font-size: 30px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

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

.error-links h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.error-links__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.error-links__list a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-links__list a:hover {
  border-color: var(--ok);
  color: var(--ok);
}

/* ============================================================
   footer  (locked shell)
   ============================================================ */

.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 48px 0 0;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  padding-bottom: 36px;
}

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

.footer-brand {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  max-width: 34ch;
}

.footer-status {
  font-size: 13px;
  color: var(--ink-soft);
}

.footer-col__title {
  font-size: 15px;
  margin-bottom: 14px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

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

.footer-links a:hover {
  color: var(--ok);
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 24px;
  border-top: 1px solid var(--line);
}

.footer-copy {
  font-size: 13px;
  color: var(--ink-soft);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-nav a {
  font-size: 13px;
  color: var(--ink-soft);
}

.footer-nav a:hover {
  color: var(--ok);
}

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

@media (max-width: 1024px) {
  :root {
    --gap: 28px;
  }

  .site-nav__link {
    padding: 8px 8px;
    font-size: 13px;
  }

  .hero__title,
  .page-title {
    font-size: 30px;
  }

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

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

@media (max-width: 900px) {
  .flow-grid,
  .combo-grid,
  .scenario-grid,
  .brief-grid,
  .note-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-card--wide {
    grid-column: span 2;
  }

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

@media (max-width: 860px) {
  .site-nav,
  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-header__inner {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .shell {
    padding: 0 18px;
  }

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

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

  .hero {
    padding: 32px 0;
  }

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

  .stage-track,
  .flow-grid,
  .combo-grid,
  .scenario-grid,
  .brief-grid,
  .note-grid,
  .faq-brief__list,
  .dimension-list,
  .compare-matrix,
  .advice-grid,
  .link-group,
  .related-list,
  .related-links__list,
  .material-columns,
  .scene-map__grid,
  .stage-item__cols {
    grid-template-columns: minmax(0, 1fr);
  }

  .flow-card--wide {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .footer-bar {
    padding: 16px 18px;
  }
}

@media (max-width: 480px) {
  .shell {
    padding: 0 14px;
  }

  .hero__title,
  .page-title {
    font-size: 23px;
  }

  .section__title,
  .section-title,
  .module-title,
  .content-block__title {
    font-size: 19px;
  }

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

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

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

  .agenda__item {
    grid-template-columns: 32px minmax(0, 1fr);
  }

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

  .panel__row .tag {
    grid-row: auto;
    grid-column: 2 / 3;
  }
}

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

  .flow-card__figure img {
    transition: none;
  }
}