.page-about {
  --about-tint: rgba(110, 79, 130, 0.22);
  --about-line: rgba(30, 74, 102, 0.9);
  color: var(--paper);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-about__crumb {
  padding-block: clamp(1rem, 3vw, 1.75rem) 0;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--about-line);
  margin-top: clamp(0.75rem, 2vw, 1.5rem);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.4;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(90% 70% at 12% 8%, rgba(57, 230, 255, 0.18), transparent 62%),
    linear-gradient(180deg, rgba(6, 24, 38, 0.72) 0%, rgba(6, 24, 38, 0.92) 58%, var(--ink) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(2.25rem, 8vw, 5.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6.4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0.6rem 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  color: var(--steel);
  font-size: clamp(0.9375rem, 2.4vw, 1.0625rem);
  line-height: 1.8;
  max-width: 58ch;
  margin: 1rem 0 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .stat {
  background: rgba(3, 32, 46, 0.82);
  padding: 0.9rem 1rem 1rem;
}

.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
  line-height: 1.2;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .stat__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--steel);
}

/* 索引 + 正文骨架 */
.page-about .about-shell {
  display: grid;
  gap: clamp(1.25rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-index {
  border-top: 1px solid var(--about-line);
  padding-top: 0.85rem;
}

.page-about .about-index__label {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--steel-dim);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--about-line);
  color: var(--steel);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--steel-dim);
  transition: color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
  background: rgba(57, 230, 255, 0.08);
}

.page-about .about-index__link:hover .about-index__num,
.page-about .about-index__link:focus-visible .about-index__num {
  color: var(--gold);
}

/* 章节 */
.page-about .about-section {
  padding-block: clamp(1.75rem, 5vw, 3rem);
  border-top: 1px solid var(--about-line);
}

.page-about .about-body > .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 0.9rem;
}

.page-about .section-head .index {
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 4.2vw, 1.9rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

.page-about .about-section__lead {
  color: var(--steel);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 62ch;
  margin: 0 0 0.85rem;
}

/* 四类内容中心 */
.page-about .centers {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.25rem, 4vw, 1.75rem);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .center {
  background: var(--panel);
  padding: 1.1rem 1.15rem 1.25rem;
  transition: background-color 0.25s var(--ease);
}

.page-about .center:hover {
  background: #06293a;
}

.page-about .center__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .center__title {
  margin: 0.4rem 0 0.45rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .center p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

/* 图片区 */
.page-about .about-media {
  margin: clamp(1.25rem, 4vw, 1.75rem) 0 0;
}

/* 历程轨道 */
.page-about .track {
  position: relative;
  margin: clamp(1.5rem, 4vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.45rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--rail) 55%, rgba(30, 74, 102, 0) 100%);
}

.page-about .track-item {
  position: relative;
  padding-left: 2.1rem;
  padding-bottom: clamp(1.25rem, 3.5vw, 1.85rem);
}

.page-about .track-item:last-child {
  padding-bottom: 0;
}

.page-about .track-node {
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 15px;
  height: 15px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(57, 230, 255, 0.08);
  transition: background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .track-item:hover .track-node,
.page-about .track-item:focus-within .track-node {
  background: var(--cyan);
  box-shadow: 0 0 16px rgba(57, 230, 255, 0.6);
}

.page-about .track-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .track-title {
  margin: 0.15rem 0 0.35rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .track-note {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
  max-width: 56ch;
}

/* 团队展签 */
.page-about .crew-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.25rem, 4vw, 1.75rem);
}

.page-about .crew-card {
  border: 1px solid var(--about-line);
  background: var(--panel);
}

.page-about .crew-card__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--ease);
}

.page-about .crew-card__summary::-webkit-details-marker {
  display: none;
}

.page-about .crew-card__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--gold);
  transition: transform 0.25s var(--ease), color 0.2s var(--ease);
}

.page-about .crew-card[open] .crew-card__summary::after {
  content: "+";
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .crew-card__summary:hover,
.page-about .crew-card__summary:focus-visible {
  background: rgba(57, 230, 255, 0.07);
}

.page-about .crew-card__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .crew-card__name {
  flex: 1;
  font-size: 1rem;
  color: var(--paper);
  font-weight: 700;
}

.page-about .crew-card__body {
  padding: 0.9rem 1.1rem 1.15rem;
  border-top: 1px solid var(--about-line);
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
}

/* 服务原则 */
.page-about .about-section--tinted {
  background: linear-gradient(122deg, var(--about-tint) 0%, rgba(11, 39, 64, 0.55) 46%, rgba(6, 24, 38, 0) 100%);
  border-top: 1px solid var(--violet);
  padding-inline: clamp(1rem, 3.5vw, 1.75rem);
}

.page-about .principles {
  display: grid;
  gap: 1.4rem;
  margin-top: clamp(1.25rem, 4vw, 1.9rem);
}

.page-about .principle {
  border-top: 2px solid var(--rail);
  padding-top: 0.9rem;
}

.page-about .principle__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .principle h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: 1.0313rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .principle p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
}

/* 下一步 */
.page-about .about-cta {
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--rail);
  background: rgba(3, 32, 46, 0.78);
}

.page-about .about-cta h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.4vw, 1.55rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
  max-width: 56ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.15rem;
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem 2rem;
  }
}

/* 桌面：左侧索引轨道粘性定位 */
@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    border-top: 0;
    border-left: 1px solid var(--about-line);
    padding-top: 0;
    padding-left: 1rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-bottom: 1px solid transparent;
    padding: 0.5rem 0;
    font-size: 0.9375rem;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-bottom-color: var(--gold);
  }

  .page-about .about-hero h1 {
    max-width: 18ch;
  }
}

.page-about {
  --about-line: rgba(30, 74, 102, 0.9);
  --about-tint: rgba(110, 79, 130, 0.22);
  color: var(--paper);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-about__crumb {
  padding-block: clamp(1rem, 3vw, 1.75rem) 0;
}

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--about-line);
  margin-top: clamp(0.75rem, 2vw, 1.5rem);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.4;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(90% 70% at 12% 8%, rgba(57, 230, 255, 0.18), transparent 62%),
    linear-gradient(180deg, rgba(6, 24, 38, 0.72) 0%, rgba(6, 24, 38, 0.92) 58%, var(--ink) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(2.25rem, 8vw, 5.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6.4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0.6rem 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  color: var(--steel);
  font-size: clamp(0.9375rem, 2.4vw, 1.0625rem);
  line-height: 1.8;
  max-width: 58ch;
  margin: 1rem 0 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .stat {
  background: rgba(3, 32, 46, 0.82);
  padding: 0.9rem 1rem 1rem;
}

.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
  line-height: 1.2;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .stat__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--steel);
}

.page-about .about-shell {
  display: grid;
  gap: clamp(1.25rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-index {
  border-top: 1px solid var(--about-line);
  padding-top: 0.85rem;
}

.page-about .about-index__label {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--steel-dim);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--about-line);
  color: var(--steel);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--steel-dim);
  transition: color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
  background: rgba(57, 230, 255, 0.08);
}

.page-about .about-index__link:hover .about-index__num,
.page-about .about-index__link:focus-visible .about-index__num {
  color: var(--gold);
}

.page-about .about-section {
  padding-block: clamp(1.75rem, 5vw, 3rem);
  border-top: 1px solid var(--about-line);
}

.page-about .about-body > .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 0.9rem;
}

.page-about .section-head .index {
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 4.2vw, 1.9rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

.page-about .about-section__lead {
  color: var(--steel);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 62ch;
  margin: 0 0 0.85rem;
}

.page-about .centers {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.25rem, 4vw, 1.75rem);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .center {
  background: var(--panel);
  padding: 1.1rem 1.15rem 1.25rem;
  transition: background-color 0.25s var(--ease);
}

.page-about .center:hover {
  background: #06293a;
}

.page-about .center__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .center__title {
  margin: 0.4rem 0 0.45rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .center p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-media {
  margin: clamp(1.25rem, 4vw, 1.75rem) 0 0;
}

.page-about .track {
  position: relative;
  margin: clamp(1.5rem, 4vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.45rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--rail) 55%, rgba(30, 74, 102, 0) 100%);
}

.page-about .track-item {
  position: relative;
  padding-left: 2.1rem;
  padding-bottom: clamp(1.25rem, 3.5vw, 1.85rem);
}

.page-about .track-item:last-child {
  padding-bottom: 0;
}

.page-about .track-node {
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 15px;
  height: 15px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(57, 230, 255, 0.08);
  transition: background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .track-item:hover .track-node,
.page-about .track-item:focus-within .track-node {
  background: var(--cyan);
  box-shadow: 0 0 16px rgba(57, 230, 255, 0.6);
}

.page-about .track-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .track-title {
  margin: 0.15rem 0 0.35rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .track-note {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
  max-width: 56ch;
}

.page-about .crew-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.25rem, 4vw, 1.75rem);
}

.page-about .crew-card {
  border: 1px solid var(--about-line);
  background: var(--panel);
}

.page-about .crew-card__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--ease);
}

.page-about .crew-card__summary::-webkit-details-marker {
  display: none;
}

.page-about .crew-card__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--gold);
  transition: transform 0.25s var(--ease), color 0.2s var(--ease);
}

.page-about .crew-card[open] .crew-card__summary::after {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .crew-card__summary:hover,
.page-about .crew-card__summary:focus-visible {
  background: rgba(57, 230, 255, 0.07);
}

.page-about .crew-card__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .crew-card__name {
  flex: 1;
  font-size: 1rem;
  color: var(--paper);
  font-weight: 700;
}

.page-about .crew-card__body {
  padding: 0.9rem 1.1rem 1.15rem;
  border-top: 1px solid var(--about-line);
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .about-section--tinted {
  background: linear-gradient(122deg, var(--about-tint) 0%, rgba(11, 39, 64, 0.55) 46%, rgba(6, 24, 38, 0) 100%);
  border-top: 1px solid var(--violet);
  padding-inline: clamp(1rem, 3.5vw, 1.75rem);
}

.page-about .principles {
  display: grid;
  gap: 1.4rem;
  margin-top: clamp(1.25rem, 4vw, 1.9rem);
}

.page-about .principle {
  border-top: 2px solid var(--rail);
  padding-top: 0.9rem;
}

.page-about .principle__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .principle h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: 1.0313rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .principle p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .about-cta {
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--rail);
  background: rgba(3, 32, 46, 0.78);
}

.page-about .about-cta h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.4vw, 1.55rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--steel);
  max-width: 56ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.15rem;
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem 2rem;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    border-top: 0;
    border-left: 1px solid var(--about-line);
    padding-top: 0;
    padding-left: 1rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-bottom: 1px solid transparent;
    padding: 0.5rem 0;
    font-size: 0.9375rem;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-bottom-color: var(--gold);
  }

  .page-about .about-hero h1 {
    max-width: 18ch;
  }
}