:root {
  --paper: #F6F5F2;
  --ink: #1C1B19;
  --ink-soft: #6B6862;
  --line: #DEDBD4;
  --green: #2F4F43;
  --clay: #A9522E;
  --dark: #171714;
  --container: 1120px;
  --radius: 6px;
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

/* ============ 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-cn);
  font-size: 16.5px;
  line-height: 1.8;
  font-weight: 400;
}

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

p {
  margin: 0;
}

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

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

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

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

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

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

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

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

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

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 88px;
}

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

.page-layout {
  display: grid;
  gap: 56px;
  align-items: start;
}

.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 300px;
}

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

.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar-left .page-layout {
  grid-template-columns: 260px minmax(0, 1fr);
}

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

.content-aside,
.layout-aside,
.page-aside {
  min-width: 0;
}

.divider-line,
.rule,
.section-divider {
  height: 1px;
  margin: 0;
  border: 0;
  background-color: var(--line);
}

.section-divider {
  margin: 56px 0;
}

/* ============ header ============ */

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

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px;
  transition: padding 180ms ease;
}

.site-header.is-scrolled .header-inner {
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand-mark {
  flex: 0 0 auto;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

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

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 200ms ease;
}

.nav-link:hover::after,
.nav-link.is-current::after {
  transform: scaleX(1);
}

.nav-link:hover {
  color: var(--green);
}

.nav-link.is-current {
  color: var(--ink);
}

.header-cta {
  flex: 0 0 auto;
  padding: 9px 18px;
  font-size: 14.5px;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  transition: background-color 160ms ease, color 160ms ease;
}

.header-cta:hover {
  background-color: var(--ink);
  color: var(--paper);
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

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

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

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

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

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

.mobile-nav-list {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 24px 20px;
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 16px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.mobile-nav-list a:hover {
  color: var(--green);
}

/* ============ footer ============ */

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background-color: var(--paper);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 32px;
}

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

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

.footer-brand-text {
  margin-top: 12px;
  max-width: 380px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.footer-col-title {
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

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

.footer-links a {
  font-size: 14.5px;
  color: var(--ink-soft);
}

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

.footer-version {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid var(--line);
}

.version-text {
  font-size: 13.5px;
  color: var(--ink-soft);
}

/* ============ breadcrumb & page head ============ */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 28px 0 0;
  font-size: 13.5px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 20px 0 24px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: normal;
}

.page-head {
  padding: 32px 0 8px;
}

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

.page-hero {
  padding: 32px 0 8px;
}

.page-hero-inner {
  max-width: 720px;
}

.page-hero-kicker,
.page-kicker,
.page-hero-eyebrow {
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
}

.page-hero-lead {
  font-size: 16.5px;
  color: var(--ink-soft);
}

.page-title-block {
  padding: 32px 0 8px;
}

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

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.section:first-of-type {
  border-top: 0;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.section-lead,
.section-intro {
  margin-top: 12px;
  max-width: 720px;
  font-size: 16px;
  color: var(--ink-soft);
}

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

.text-link {
  color: var(--green);
  border-bottom: 1px solid rgba(47, 79, 67, 0.35);
  transition: border-color 160ms ease, color 160ms ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  font-size: 15px;
  border-radius: var(--radius);
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn-primary {
  background-color: var(--green);
  color: #F6F5F2;
  border: 1px solid var(--green);
}

.btn-primary:hover {
  background-color: #243d34;
  color: #F6F5F2;
}

.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--ink);
}

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

.section-media {
  margin: 0 0 32px;
}

.section-media img,
.media-figure img,
.standards-figure img,
.history-figure img,
.communication-figure img,
.faq-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background-color: var(--line);
}

.media-figure {
  margin: 0 0 28px;
}

.media-caption,
.figure-caption {
  font-size: 13.5px;
  color: var(--ink-soft);
}

/* ============ tables ============ */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.data-table {
  min-width: 640px;
  font-size: 15px;
}

.table-caption {
  padding: 16px 20px 0;
  text-align: left;
  font-size: 13.5px;
  color: var(--ink-soft);
}

.data-table thead th {
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  color: var(--ink-soft);
  background-color: #F1EFEA;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.data-table tbody th,
.data-table tbody td {
  padding: 16px 20px;
  text-align: left;
  vertical-align: top;
  font-weight: 400;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

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

.data-table tbody th {
  font-weight: 600;
}

.data-table tbody tr {
  transition: background-color 120ms ease;
}

.data-table tbody tr:hover {
  background-color: #F1EFEA;
}

.data-table a {
  color: var(--green);
}

.data-table a:hover {
  color: var(--clay);
}

/* ============ index hero ============ */

.home-main {
  width: 100%;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  color: #F6F5F2;
  background-color: var(--dark);
}

.hero-media {
  position: absolute;
  inset: 0;
  margin: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  width: 100%;
  margin: 0 auto;
  padding: 96px 24px 88px;
}

.hero-title {
  max-width: 760px;
  font-size: clamp(30px, 4.2vw, 50px);
  line-height: 1.2;
  font-weight: 600;
  color: #F6F5F2;
}

.hero-slogan {
  margin-top: 18px;
  font-size: 19px;
  color: #E4E1DA;
}

.hero-text {
  margin-top: 16px;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.85;
  color: #CFCBC3;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-actions .btn-primary {
  background-color: #F6F5F2;
  color: var(--dark);
  border-color: #F6F5F2;
}

.hero-actions .btn-primary:hover {
  background-color: #DEDBD4;
  color: var(--dark);
}

.hero-actions .btn-ghost {
  color: #F6F5F2;
  border-color: rgba(246, 245, 242, 0.55);
}

.hero-actions .btn-ghost:hover {
  background-color: #F6F5F2;
  color: var(--dark);
  border-color: #F6F5F2;
}

/* ============ index sections ============ */

.home-main > .section {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* scenarios overview */

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.scenario-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.scenario-media {
  margin: 0 0 18px;
}

.scenario-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--line);
}

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

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

.scenario-goal {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink);
}

.scenario-note {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.scenario-body .text-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14.5px;
}

/* timeline */

.timeline {
  position: relative;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background-color: var(--line);
}

.timeline-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 28px;
}

.timeline-node:last-child {
  padding-bottom: 0;
}

.timeline-index {
  position: absolute;
  left: -34px;
  top: 2px;
  width: 24px;
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
  background-color: var(--paper);
  text-align: center;
}

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

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

.timeline-output {
  margin-top: 6px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* standards list */

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

.standard-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.standard-index {
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
  padding-top: 3px;
}

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

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

.standard-text {
  margin-top: 8px;
  max-width: 720px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* updates list */

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

.update-item {
  display: grid;
  grid-template-columns: 120px 130px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

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

.update-tag {
  display: inline-block;
  justify-self: start;
  padding: 3px 10px;
  font-size: 12.5px;
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 999px;
}

.update-text {
  min-width: 0;
  font-size: 15px;
  color: var(--ink);
}

/* faq */

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

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

.faq-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
  font-size: 16.5px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  margin-left: auto;
  font-size: 18px;
  color: var(--ink-soft);
  transition: transform 180ms ease;
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

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

.faq-answer p {
  max-width: 760px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.faq-answer p + p {
  margin-top: 10px;
}

.faq-index {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
}

.faq-q-text {
  min-width: 0;
}

.faq-mark {
  flex: 0 0 auto;
  margin-left: auto;
  font-size: 18px;
  color: var(--ink-soft);
  transition: transform 180ms ease;
}

.faq-item[open] .faq-mark {
  transform: rotate(45deg);
}

.faq-question::after {
  display: none;
}

/* cooperation entry (index) */

.cooperation-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.cooperation-intro {
  min-width: 0;
}

.cooperation-text {
  margin-top: 14px;
  max-width: 520px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.cooperation-intro .btn {
  margin-top: 24px;
}

.cooperation-checklist {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  align-content: start;
}

.checklist-item {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--ink);
}

.checklist-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--green);
  border-radius: 2px;
}

/* ============ services page ============ */

.section-services-table {
  padding: 48px 0 0;
  border-top: 0;
}

.section-services-detail {
  padding: 56px 0 0;
  border-top: 0;
}

.service-item {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.service-item:first-of-type {
  padding-top: 24px;
}

.service-figure {
  margin: 0;
}

.service-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--line);
}

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

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

.service-cond,
.service-desc,
.service-exclude {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.service-cond {
  color: var(--ink);
}

.service-exclude {
  padding-left: 14px;
  border-left: 2px solid var(--clay);
}

.section-combination {
  padding: 56px 0 0;
  border-top: 0;
}

.combination-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 40px;
  margin-top: 24px;
}

.combination-item {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
  min-width: 0;
}

.combination-name {
  font-size: 16.5px;
  font-weight: 600;
}

.combination-text {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* services aside */

.content-aside {
  position: sticky;
  top: 96px;
}

.aside-block {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.aside-block + .aside-block {
  margin-top: 20px;
}

.aside-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}

.aside-links {
  display: grid;
  gap: 14px;
}

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

.aside-link-desc {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--ink-soft);
}

.aside-version-text {
  font-size: 14.5px;
  color: var(--ink-soft);
}

.aside-version .text-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14.5px;
}

/* ============ scenarios page ============ */

.scenario-block {
  padding: 64px 0;
}

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

.scenario-block--media-left .scenario-media {
  order: 1;
}

.scenario-block--media-left .scenario-content {
  order: 2;
}

.scenario-block--media-right .scenario-media {
  order: 2;
}

.scenario-block--media-right .scenario-content {
  order: 1;
}

.scenario-block .scenario-media {
  margin: 0;
}

.scenario-block .scenario-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--line);
}

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

.scenario-index {
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
}

.scenario-content h2 {
  margin-top: 8px;
  font-size: 22px;
  font-weight: 600;
}

.scenario-content .scenario-goal {
  margin-top: 14px;
  font-size: 16px;
}

.scenario-detail {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.scenario-content h3 {
  margin-top: 22px;
  font-size: 16px;
  font-weight: 600;
}

.scenario-points {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

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

.scenario-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background-color: var(--clay);
}

.scenario-services {
  margin-top: 20px;
  font-size: 15px;
}

.scenario-map {
  padding: 64px 0;
}

.scenario-table {
  min-width: 520px;
}

.coop-entry {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.coop-entry-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.coop-entry-text {
  min-width: 0;
  max-width: 640px;
}

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

.coop-entry-text p {
  margin-top: 10px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.coop-entry-actions,
.coop-entry-action {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 40px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 13.5px;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 14.5px;
}

/* ============ process page ============ */

.process-layout {
  padding-top: 48px;
}

.process-index {
  position: sticky;
  top: 96px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.step-index {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.step-index-item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.step-index-item a:hover {
  color: var(--green);
}

.step-index .step-num {
  font-size: 13px;
  font-weight: 500;
  color: var(--clay);
}

.aside-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
}

.process-intro {
  padding-bottom: 8px;
}

.process-intro .section-title {
  margin-top: 4px;
}

.process-intro p {
  margin-top: 12px;
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.process-steps {
  padding: 8px 0;
}

.process-steps .section-title {
  margin-bottom: 24px;
}

.step-block {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.step-block:last-child {
  border-bottom: 0;
}

.step-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.step-block .step-num {
  font-size: 14px;
  font-weight: 500;
  color: var(--clay);
}

.step-title {
  font-size: 18px;
  font-weight: 600;
}

.step-body {
  margin-top: 12px;
  padding-left: 32px;
  min-width: 0;
}

.step-body p {
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.step-deliverables {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

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

.step-deliverables li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background-color: var(--green);
}

.process-table-section {
  padding: 8px 0;
}

.process-table-section .section-note {
  margin-top: 12px;
}

.process-change {
  padding: 8px 0 0;
}

.change-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.change-item {
  min-width: 0;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

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

.change-item p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ============ standards page ============ */

.layout-shell {
  padding-top: 48px;
}

.section-standards-intro {
  padding: 0 0 48px;
  border-top: 0;
}

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

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

.section-standards-table {
  padding: 48px 0;
}

.standards-table {
  min-width: 720px;
}

.section-revision {
  padding: 48px 0;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

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

.col-note {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

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

.col-body p {
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.col-body p + p {
  margin-top: 12px;
}

.section-compliance {
  padding: 48px 0;
}

.responsibility-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.responsibility-item {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

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

.responsibility-item p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-related {
  padding: 48px 0 0;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 40px;
  margin-top: 24px;
}

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

.related-link {
  font-size: 16px;
}

.related-desc {
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

/* ============ updates page ============ */

.updates-aside {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.aside-block-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}

.archive-group + .archive-group {
  margin-top: 18px;
}

.archive-group-title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

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

.archive-list a {
  font-size: 14.5px;
}

.current-version {
  padding: 0 0 48px;
  border-top: 0;
}

.version-panel {
  margin-top: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

.version-number {
  font-size: 17px;
  font-weight: 600;
}

.version-effective {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.version-summary {
  margin-top: 12px;
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.updates-list-section {
  padding: 0 0 48px;
}

.updates-list {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.updates-list .update-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.update-entry {
  min-width: 0;
}

.update-meta {
  min-width: 0;
}

.update-entry .update-date {
  display: block;
  font-size: 14px;
  color: var(--ink-soft);
}

.update-entry .update-tag {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  font-size: 12.5px;
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 999px;
}

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

.update-title {
  font-size: 16.5px;
  font-weight: 600;
}

.update-body .update-text {
  margin-top: 10px;
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.history-note {
  padding: 0 0 16px;
}

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

.history-text {
  max-width: 720px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.history-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 18px;
}

.history-links a {
  font-size: 15px;
}

/* ============ faq page ============ */

.faq-group {
  padding: 48px 0;
}

.faq-group .section-intro {
  margin-bottom: 24px;
}

.faq-figure {
  margin: 0 0 28px;
}

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

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

.coop-entry-list {
  min-width: 0;
  max-width: 460px;
}

.coop-entry-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
}

.coop-entry-items {
  display: grid;
  gap: 8px;
}

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

.coop-entry-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background-color: var(--clay);
}

.coop-entry .text-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 15px;
}

/* ============ cooperation page ============ */

.coop-requirements {
  padding: 0 0 48px;
}

.requirement-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 40px;
  margin-top: 24px;
}

.requirement-item {
  min-width: 0;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

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

.requirement-text {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.coop-communication {
  padding: 0 0 48px;
}

.communication-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  gap: 40px;
  align-items: start;
  margin-top: 24px;
}

.communication-text {
  min-width: 0;
}

.communication-text p {
  max-width: 640px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.communication-text p + p {
  margin-top: 12px;
}

.communication-figure {
  margin: 0;
}

.communication-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--line);
}

.coop-checklist {
  padding: 0 0 48px;
}

.checklist-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.checklist-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #FBFAF8;
}

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

.checklist-items {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

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

.checklist-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--green);
  border-radius: 2px;
}

.coop-related {
  padding: 0;
}

.coop-related .related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 40px;
  max-width: none;
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
}

.coop-related .related-links li {
  min-width: 0;
}

.coop-related .related-links a {
  font-size: 16px;
}

.coop-related .related-desc {
  display: block;
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

/* ============ 404 ============ */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 88px;
}

.error-hero {
  padding: 80px 0 56px;
  border-bottom: 1px solid var(--line);
}

.error-inner {
  padding: 0;
}

.error-code {
  font-size: 14px;
  font-weight: 500;
  color: var(--clay);
}

.error-title {
  margin-top: 12px;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.25;
}

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

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.error-guide {
  padding: 56px 0 0;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 40px;
  margin-top: 24px;
}

.error-links a {
  font-size: 16px;
}

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

@media (max-width: 960px) {
  .header-inner {
    gap: 20px;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    margin-left: auto;
  }

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

  .content-aside,
  .process-index {
    position: static;
  }

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

  .change-grid,
  .responsibility-list,
  .checklist-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cooperation-panel {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 32px;
  }

  .two-col {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

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

@media (max-width: 760px) {
  .scenario-block .scenario-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .scenario-block--media-left .scenario-media,
  .scenario-block--media-right .scenario-media {
    order: 1;
  }

  .scenario-block--media-left .scenario-content,
  .scenario-block--media-right .scenario-content {
    order: 2;
  }

  .service-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .update-tag {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .header-inner {
    padding: 14px 16px;
  }

  .container,
  .inner-main,
  .footer-inner,
  .footer-version,
  .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .home-main > .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-content {
    padding: 64px 16px 56px;
  }

  .hero-media img {
    opacity: 0.38;
  }

  .section {
    padding: 48px 0;
  }

  .scenario-grid,
  .change-grid,
  .responsibility-list,
  .checklist-columns,
  .combination-list,
  .requirement-list,
  .related-list,
  .coop-related .related-links,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .cooperation-panel {
    padding: 24px 20px;
  }

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

  .standard-index {
    padding-top: 0;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 40px;
  }

  .timeline {
    padding-left: 28px;
  }

  .timeline-index {
    left: -28px;
    width: 20px;
  }

  .step-body {
    padding-left: 0;
  }

  .table-wrap {
    border-radius: 4px;
  }

  .data-table {
    min-width: 560px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions .btn,
  .coop-entry-actions .btn,
  .coop-entry-action .btn,
  .error-actions .btn {
    width: auto;
    flex: 1 1 auto;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}