.page-about {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper-050);
  padding: clamp(32px, 5vw, 66px) 0 clamp(48px, 7vw, 94px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(120% 92% at 8% 0%, rgba(53, 97, 140, 0.55), rgba(10, 26, 47, 0) 62%),
    repeating-linear-gradient(90deg, rgba(230, 235, 241, 0.10) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(230, 235, 241, 0.055) 0 1px, transparent 1px 96px);
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(245, 247, 249, 0.62);
}

.page-about .breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--signal);
}

.page-about .breadcrumb__sep {
  margin: 0 0.6em;
  opacity: 0.55;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 54px);
  margin-top: clamp(26px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(258px, 0.72fr);
    align-items: end;
  }
}

.page-about .about-hero .page-head__kicker {
  margin: 0;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.2em;
  font-weight: 600;
  color: var(--signal);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 5.3vw, 4.2rem);
  line-height: 0.99;
  letter-spacing: -0.02em;
}

.page-about .about-hero .page-head__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.3vw, 1.075rem);
  line-height: 1.78;
  color: rgba(245, 247, 249, 0.84);
}

.page-about .about-status {
  border: 1px solid var(--line-dark);
  background: linear-gradient(180deg, rgba(20, 55, 88, 0.92), rgba(10, 26, 47, 0.94));
  box-shadow: var(--shadow-1);
  padding: 18px 20px 14px;
}

.page-about .about-status__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(245, 247, 249, 0.6);
}

.page-about .about-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(31, 191, 150, 0.18);
}

.page-about .status-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line-dark);
  font-size: 13px;
}

.page-about .status-row__k {
  color: rgba(245, 247, 249, 0.58);
  letter-spacing: 0.04em;
}

.page-about .status-row__v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--paper-050);
}

/* ---------- 通用区块 ---------- */
.page-about .about-band {
  position: relative;
  padding: var(--section-gap) 0;
}

.page-about .about-band--paper {
  background: var(--paper-050);
  color: var(--ink-900);
}

.page-about .about-band--paper-100 {
  background: var(--paper-100);
  color: var(--ink-900);
}

.page-about .about-band--paper-100::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 8px);
  opacity: 0.85;
}

.page-about .about-band--ink {
  background: var(--ink-900);
  color: var(--paper-050);
}

.page-about .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .section-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.65;
}

.page-about .section-kicker--onDark {
  color: rgba(245, 247, 249, 0.6);
}

.page-about .section-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.2vw, 2.45rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  max-width: 26ch;
}

.page-about .section-title--tight {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
}

.page-about .section-title--onDark {
  color: var(--paper-050);
}

.page-about .band-lede {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .band-lede--onDark {
  color: rgba(245, 247, 249, 0.72);
}

.page-about .band-lede a,
.page-about .band-main a,
.page-about .assure-card__txt a {
  color: var(--signal-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .band-lede--onDark a {
  color: var(--signal);
}

.page-about .band-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 44px);
}

@media (min-width: 900px) {
  .page-about .band-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  }

  .page-about .band-grid--rev {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

.page-about .band-main p {
  margin: 18px 0 0;
  max-width: 70ch;
  font-size: 16.5px;
  line-height: 1.78;
}

/* ---------- 定位小数据条 ---------- */
.page-about .position-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 620px) {
  .page-about .position-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .position-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .position-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 20px;
  background: var(--paper-050);
}

.page-about .position-fact__num {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}

.page-about .position-fact__txt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 发展历程 ---------- */
.page-about .tl-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
  margin-top: clamp(28px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-about .tl-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }
}

.page-about .media-frame {
  margin: 0;
}

.page-about .media-frame__inner {
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--line-strong);
}

.page-about .media-frame__inner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-frame__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.page-about .tl-list {
  margin: 0;
  padding: 0 0 0 clamp(14px, 2vw, 26px);
  list-style: none;
  border-left: 1px solid var(--line-strong);
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(14px, 2vw, 26px) - 1px);
  top: 26px;
  width: 7px;
  height: 1px;
  background: var(--signal);
}

.page-about .tl-node {
  border-top: 1px solid var(--line);
}

.page-about .tl-item:first-child .tl-node {
  border-top-color: var(--line-strong);
}

.page-about .tl-node__sum {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 14px;
  align-items: baseline;
  gap: 12px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-node__sum::-webkit-details-marker {
  display: none;
}

.page-about .tl-node__year {
  font-size: 14px;
  font-weight: 500;
  color: var(--signal-deep);
}

.page-about .tl-node__title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--ink-900);
}

.page-about .tl-node__ind {
  align-self: center;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ink-500);
  transform: rotate(45deg);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .tl-node[open] .tl-node__ind {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .tl-node__body {
  padding: 0 0 22px 84px;
}

.page-about .tl-node__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .tl-node--current .tl-node__year {
  color: var(--mint);
}

.page-about .tl-item--current::before {
  background: var(--mint);
  width: 12px;
}

@media (max-width: 620px) {
  .page-about .tl-node__sum {
    grid-template-columns: 58px minmax(0, 1fr) 12px;
    gap: 9px;
    padding: 17px 0;
  }

  .page-about .tl-node__body {
    padding: 0 0 18px 67px;
  }
}

/* ---------- 赛季四阶段 ---------- */
.page-about .season-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 3.6vw, 44px);
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

@media (min-width: 720px) {
  .page-about .season-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .season-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .season-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 20px 30px;
  background: var(--ink-700);
  border-top: 3px solid var(--ink-500);
}

.page-about .season-card--prepare {
  border-top-color: var(--sand);
}

.page-about .season-card--open {
  border-top-color: var(--signal);
}

.page-about .season-card--review {
  border-top-color: var(--mint);
}

.page-about .season-card--archive {
  border-top-color: var(--ink-500);
}

.page-about .season-card__stage {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(245, 247, 249, 0.62);
}

.page-about .season-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.32;
  color: var(--paper-050);
}

.page-about .season-card__txt {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(245, 247, 249, 0.72);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(26px, 3.6vw, 42px);
  align-items: start;
}

@media (min-width: 960px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

.page-about .team-bars {
  display: flex;
  gap: 3px;
  height: 66px;
}

.page-about .team-bar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-grow: var(--grow, 1);
  flex-basis: 0;
  min-width: 0;
  padding: 10px 10px 11px;
  overflow: hidden;
  transition: flex-grow 240ms var(--ease);
}

.page-about .team-bar--a {
  --grow: 11;
  background: var(--ink-700);
  color: var(--paper-050);
}

.page-about .team-bar--b {
  --grow: 9;
  background: var(--signal);
  color: var(--ink-900);
}

.page-about .team-bar--c {
  --grow: 10;
  background: var(--ink-500);
  color: var(--paper-050);
}

.page-about .team-bar--d {
  --grow: 8;
  background: var(--mint);
  color: var(--ink-900);
}

.page-about .team-bar__name {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .team-bar__num {
  font-size: 1.15rem;
  font-weight: 500;
}

@media (max-width: 760px) {
  .page-about .team-bars {
    flex-direction: column;
    height: auto;
    gap: 2px;
  }

  .page-about .team-bar {
    flex: none;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
  }
}

.page-about .team-roles {
  margin: 26px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
}

@media (min-width: 700px) {
  .page-about .team-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .team-role {
  padding: 18px 18px 20px;
  background: var(--paper-050);
}

.page-about .team-role dt {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}

.page-about .team-role dd {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .team-media .media-frame__inner {
  border-color: var(--line);
  background: var(--ink-700);
}

/* ---------- 覆盖范围 ---------- */
.page-about .reach-stats {
  margin: 26px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .reach-stat {
  padding: 16px 14px 18px;
  background: var(--paper-100);
}

.page-about .reach-stat dt {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .reach-stat dd {
  margin: 8px 0 0;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink-900);
}

.page-about .reach-media .media-frame__inner {
  border-color: var(--line);
  background: var(--ink-900);
}

/* ---------- 时效保障 ---------- */
.page-about .assure-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 3.6vw, 42px);
  background: var(--line);
  border-top: 1px solid var(--line-strong);
}

@media (min-width: 700px) {
  .page-about .assure-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .assure-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .assure-card {
  padding: 24px 20px 28px;
  background: var(--paper-050);
  border-bottom: 1px solid var(--line);
}

.page-about .assure-card__num {
  margin: 0;
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  font-weight: 500;
  color: var(--signal-deep);
}

.page-about .assure-card__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.36;
  color: var(--ink-900);
}

.page-about .assure-card__txt {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--slate);
}

.page-about .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-about .legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-500);
}

.page-about .legend__swatch--mint {
  background: var(--mint);
}

.page-about .legend__swatch--amber {
  background: var(--amber);
}

.page-about .legend__swatch--sand {
  background: var(--sand);
}

.page-about .legend__swatch--signal {
  background: var(--signal);
}

/* ---------- 合作咨询 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(44px, 6vw, 72px);
}

.page-about .cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

@media (min-width: 940px) {
  .page-about .cta-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
}

.page-about .cta-actions .btn {
  text-decoration: none;
}

.page-about .cta-link {
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: rgba(245, 247, 249, 0.72);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(245, 247, 249, 0.35);
  transition: color 180ms var(--ease), text-decoration-color 180ms var(--ease);
}

.page-about .cta-link:hover,
.page-about .cta-link:focus-visible {
  color: var(--signal);
  text-decoration-color: var(--signal);
}

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

.page-about .flow-list__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .flow-list__num {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-about .flow-list__txt {
  font-size: 15.5px;
  line-height: 1.6;
  color: rgba(245, 247, 249, 0.86);
}

.page-about .about-icp {
  margin: clamp(34px, 5vw, 56px) 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(245, 247, 249, 0.45);
}

/* ---------- 焦点态 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}