/* IASRM static site. Plain CSS, no build step, no external resources. */

:root {
  --paper: #f7f5ef;
  --paper-raise: #fffdf8;
  --paper-sink: #efebe1;
  --ink: #14211d;
  --ink-soft: #2c3a34;
  --muted: #55635c;
  --line: #dcd6c8;
  --line-strong: #b7b1a1;
  --green: #1c4a3a;
  --green-deep: #123026;
  --green-soft: #e8ede5;
  --focus: #0a5a45;

  --serif: Georgia, "Times New Roman", "Songti SC", "Songti TC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --wrap: 1120px;
  --gutter: 32px;
  --section-pad: 88px;
  --radius: 2px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
}

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -64px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--green-deep);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.9rem;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

/* ---------- header ---------- */

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

.header-inner {
  display: flex;
  align-items: center;
  min-height: 88px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  text-decoration: none;
  flex: 0 1 auto;
  min-width: 0;
}

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

.brand-mark {
  font-family: var(--sans);
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--green-deep);
  white-space: nowrap;
}

.brand-divider {
  width: 1px;
  align-self: stretch;
  min-height: 34px;
  background: var(--line-strong);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand-name {
  font-size: 0.76rem;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: 0.01em;
  max-width: 34ch;
}

.brand-tag {
  font-size: 0.66rem;
  line-height: 1.35;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding: 4px 0;
  font-size: 0.74rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover {
  color: var(--green-deep);
  border-bottom-color: var(--green);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: 24px;
  flex: 0 0 auto;
}

.lang {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
}

.lang-btn {
  appearance: none;
  background: none;
  border: 0;
  padding: 4px 2px;
  font: inherit;
  font-size: 0.78rem;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 1px solid transparent;
}

.lang-btn:hover {
  color: var(--green-deep);
}

.lang-btn[aria-pressed="true"] {
  color: var(--green-deep);
  border-bottom-color: var(--green);
  font-weight: 600;
}

.lang-sep {
  color: var(--muted);
}

.nav-toggle {
  display: none;
  appearance: none;
  width: 40px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-box {
  display: block;
  width: 18px;
  height: 12px;
  position: relative;
}

.nav-toggle-box span {
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.18s ease, opacity 0.18s ease, top 0.18s ease;
}

.nav-toggle-box span:nth-child(1) {
  top: 0;
}

.nav-toggle-box span:nth-child(2) {
  top: 5.25px;
}

.nav-toggle-box span:nth-child(3) {
  top: 10.5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1) {
  top: 5.25px;
  transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3) {
  top: 5.25px;
  transform: rotate(-45deg);
}

:lang(zh) .site-nav a,
:lang(zh) .lang-btn,
:lang(zh) .brand-tag {
  letter-spacing: 0.04em;
  text-transform: none;
}

:lang(zh) .brand-mark {
  letter-spacing: 0.2em;
}

/* ---------- type ---------- */

h1,
h2,
h3 {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 400;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4.2vw, 3.15rem);
  line-height: 1.14;
  letter-spacing: -0.005em;
}

h2 {
  font-size: clamp(1.55rem, 2.5vw, 2.15rem);
  line-height: 1.22;
}

h3 {
  font-size: 1.12rem;
  line-height: 1.4;
}

p {
  margin: 0 0 1.1em;
}

.prose {
  max-width: 68ch;
}

.prose p {
  font-size: 1.02rem;
}

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

.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 0.72rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--muted);
}

.kicker-num {
  font-variant-numeric: tabular-nums;
  color: var(--green);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.hero .kicker-num {
  font-size: 0.5rem;
  color: var(--green);
  transform: translateY(-1px);
}

:lang(zh) .kicker {
  letter-spacing: 0.08em;
  text-transform: none;
}

.sub-title {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

:lang(zh) .sub-title {
  letter-spacing: 0.06em;
  text-transform: none;
}

.fine-print {
  margin: 14px 0 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- hero ---------- */

.hero {
  padding-block: 76px 80px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}

.hero-lede {
  max-width: 34em;
  margin: 24px 0 0;
  font-size: 1.1rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 22px;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background: var(--green-deep);
  color: var(--paper);
}

.btn-primary:hover {
  background: #0c2419;
  color: var(--paper);
}

.btn-tag {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  padding: 3px 6px;
  border: 1px solid rgba(247, 245, 239, 0.45);
  color: rgba(247, 245, 239, 0.92);
}

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

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

.btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.hero-note {
  margin: 22px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.doc-card {
  border: 1px solid var(--line-strong);
  background: var(--paper-raise);
  padding: 28px;
  border-radius: var(--radius);
}

.doc-kicker {
  margin: 0 0 14px;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

:lang(zh) .doc-kicker {
  letter-spacing: 0.08em;
  text-transform: none;
}

.doc-title {
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--ink);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.doc-meta {
  margin: 18px 0 22px;
  display: grid;
  gap: 10px;
  font-size: 0.84rem;
}

.doc-meta > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px dotted var(--line);
  padding-bottom: 8px;
}

.doc-meta > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.doc-meta dt {
  color: var(--muted);
  letter-spacing: 0.04em;
}

.doc-meta dd {
  margin: 0;
  color: var(--ink);
  text-align: right;
}

.doc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--green-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
  padding-bottom: 3px;
}

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

/* ---------- sections ---------- */

.section {
  padding-block: var(--section-pad);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 104px;
}

.section-head {
  margin-bottom: 40px;
  max-width: 70ch;
}

.section-head .kicker {
  margin-bottom: 14px;
}

/* ---------- srm ---------- */

.srm-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.pathways {
  min-width: 0;
}

.path-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.path-list li {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.path-num {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}

.path-body {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.path-name {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink);
  line-height: 1.4;
}

.path-gloss {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
}

.compare-wrap {
  margin-top: 56px;
}

.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare-item {
  background: var(--paper-raise);
  padding: 26px 28px;
}

.compare-label {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink);
}

.compare-text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- mission ---------- */

.mission-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.mission-side .sub-title + .chips {
  margin-bottom: 28px;
}

.mission-side .sub-title:last-of-type {
  margin-bottom: 16px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chip {
  padding: 5px 12px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--green-deep);
  background: var(--green-soft);
  border: 1px solid transparent;
  border-radius: var(--radius);
}

.chips-outline .chip {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink-soft);
}

/* ---------- positioning ---------- */

.pos-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.pos-card {
  background: var(--paper-raise);
  padding: 26px 22px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pos-num {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.pos-card h3 {
  font-size: 1.02rem;
  line-height: 1.35;
}

.pos-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- tasks ---------- */

.task-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.task {
  background: var(--paper-raise);
  padding: 30px 30px 32px;
  display: flex;
  flex-direction: column;
}

.task-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}

.task-num {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.task-head h3 {
  font-size: 1.06rem;
  line-height: 1.35;
}

.task-text {
  margin: 0 0 14px;
  font-size: 0.92rem;
  line-height: 1.68;
  color: var(--ink-soft);
}

.task-points {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
}

.task-points li {
  position: relative;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--muted);
  padding: 3px 0;
}

.task-points li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 12px;
  width: 5px;
  height: 1.5px;
  background: var(--muted);
}

/* ---------- initiation ---------- */

.init-prose {
  max-width: 66ch;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 40px;
  margin: 48px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.timeline li {
  position: relative;
  padding: 26px 0 0;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
}

.tl-year {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--green-deep);
  font-variant-numeric: tabular-nums;
}

.timeline h3 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 6px;
}

.timeline p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 34ch;
}

:lang(zh) .timeline h3 {
  letter-spacing: 0.04em;
  text-transform: none;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin: 48px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.facts dt {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

:lang(zh) .facts dt {
  letter-spacing: 0.05em;
  text-transform: none;
}

.facts dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- participate ---------- */

.join-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.who-list {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
}

.who-list li {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--ink-soft);
  padding-left: 14px;
  position: relative;
}

.who-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 1.5px;
  background: var(--muted);
}

.quote {
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--ink);
}

.actions {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.action-card {
  background: var(--paper-raise);
  padding: 26px 26px 28px;
}

.action-card h3 {
  font-size: 1.04rem;
  margin-bottom: 10px;
}

.action-card p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.action-card .fine-print {
  margin-top: 10px;
  font-size: 0.78rem;
}

.mail {
  margin: 0 !important;
  padding: 14px 0 0;
  border-top: 1px dotted var(--line);
}

.mail a {
  font-family: var(--serif);
  font-size: 1.02rem;
  color: var(--green-deep);
  word-break: break-word;
}

.action-doc {
  margin: 0 !important;
}

.action-doc a {
  font-size: 0.88rem;
}

.closing {
  margin: 64px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.55;
  color: var(--green-deep);
  max-width: 32em;
}

.closing-src {
  margin: 10px 0 0;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--green-deep);
  color: #e6e9df;
  padding-block: 56px;
  margin-top: 0;
}

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

.footer-mark {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: #f2f0e6;
}

.footer-name {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 0.98rem;
  color: #f2f0e6;
  max-width: 30ch;
}

.footer-tag {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #b9c4b6;
}

:lang(zh) .footer-tag {
  letter-spacing: 0.04em;
  text-transform: none;
}

.footer-meta p {
  margin: 0 0 10px;
  font-size: 0.86rem;
  line-height: 1.6;
  color: #dfe4d8;
}

.footer-meta a {
  color: #f2f0e6;
  text-decoration-color: rgba(242, 240, 230, 0.5);
}

.footer-meta a:hover {
  color: #ffffff;
}

.footer-label {
  display: inline-block;
  min-width: 8.5em;
  margin-right: 8px;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #a9b6a5;
}

:lang(zh) .footer-label {
  letter-spacing: 0.04em;
  text-transform: none;
}

.footer-meta .footer-note {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(230, 233, 223, 0.22);
  font-size: 0.79rem;
  line-height: 1.6;
  color: #c3cdbe;
}

/* ---------- responsive ---------- */

@media (min-width: 1024px) and (max-width: 1180px) {
  .site-nav ul {
    gap: 12px;
  }

  .brand-name {
    max-width: 22ch;
  }
}

@media (max-width: 1024px) {
  :root {
    --gutter: 28px;
    --section-pad: 72px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 40px;
  }

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

  .srm-grid,
  .mission-grid,
  .join-grid {
    gap: 40px;
  }
}

@media (max-width: 1023px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 0;
    padding-block: 14px;
    gap: 12px;
  }

  .brand {
    order: 1;
    flex: 1 1 auto;
  }

  .header-tools {
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin: 0;
    padding: 4px var(--gutter) 14px;
    background: var(--paper);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    z-index: 30;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding: 12px 2px;
    border-bottom: 1px solid var(--line);
    font-size: 0.78rem;
  }

  .site-nav li:last-child a {
    border-bottom: 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding-block: 52px 60px;
  }

  .hero-grid,
  .srm-grid,
  .mission-grid,
  .join-grid,
  .compare,
  .task-list,
  .facts,
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-grid {
    gap: 36px;
  }

  .compare,
  .task-list,
  .actions {
    gap: 1px;
  }

  .doc-card {
    padding: 22px;
  }

  .section {
    scroll-margin-top: 76px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 20px;
    --section-pad: 52px;
  }

  body {
    font-size: 1rem;
  }

  .header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 12px;
    row-gap: 4px;
    align-items: center;
    padding-block: 12px 10px;
  }

  .brand {
    display: contents;
  }

  .brand-mark {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
    font-size: 1.08rem;
    line-height: 1.2;
    letter-spacing: 0.22em;
  }

  .brand-divider {
    display: none;
  }

  .brand-text {
    grid-column: 1 / -1;
    grid-row: 2;
    display: block;
  }

  .brand-name {
    font-size: 0.72rem;
    line-height: 1.4;
    max-width: none;
  }

  .brand-tag {
    display: none;
  }

  .brand:focus-visible .brand-mark,
  .brand:focus-visible .brand-name {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
  }

  .header-tools {
    grid-column: 2;
    grid-row: 1;
    margin-left: 0;
  }

  .hero-lede {
    font-size: 1rem;
  }

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

  .btn {
    justify-content: center;
  }

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

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

  .pos-card {
    padding: 22px 20px 24px;
  }

  .task {
    padding: 24px 20px 26px;
  }

  .task-head {
    gap: 10px;
  }

  .timeline {
    grid-template-columns: minmax(0, 1fr);
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    padding-left: 22px;
    margin-top: 36px;
  }

  .timeline li {
    padding: 0 0 30px;
  }

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

  .timeline li::before {
    left: -26.5px;
    top: 9px;
  }

  .facts {
    gap: 20px;
    margin-top: 36px;
  }

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

  .quote {
    font-size: 0.98rem;
  }

  .closing {
    margin-top: 48px;
  }

  .footer-inner {
    gap: 28px;
  }

  .footer-label {
    display: block;
    min-width: 0;
  }

  .site-footer {
    padding-block: 42px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .nav-toggle,
  .lang,
  .skip-link {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .site-footer {
    background: #ffffff;
    color: #000000;
    border-top: 1px solid #000000;
  }

  .footer-meta p,
  .footer-name,
  .footer-mark,
  .footer-tag,
  .footer-label,
  .footer-meta a,
  .footer-meta .footer-note {
    color: #000000;
  }
}

/* 中等桌面宽度下收起副标题，避免页头被挤成四行（2026-11-07） */
@media (min-width: 1025px) and (max-width: 1439px) {
  .brand-tag {
    display: none;
  }

  .brand-name {
    max-width: 30ch;
  }
}