.page-about {
  padding-top: 0;
  background: var(--ink-900);
  color: var(--text);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-paper {
  background: var(--paper);
  color: var(--black);
}

/* ---------- 区块通用标题行 ---------- */
.page-about .about-head__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-head__eyebrow::before {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: currentColor;
}

.page-about .about-paper .about-head__eyebrow {
  color: var(--orange);
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 56px) 0 68px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(55, 240, 216, .13), transparent 58%),
    radial-gradient(90% 70% at 4% 100%, rgba(255, 107, 44, .11), transparent 62%),
    linear-gradient(163deg, #0A1428 0%, #10203A 54%, #0A1428 100%);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(44, 71, 103, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 71, 103, .38) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 76%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 76%);
}

.page-about .about-cover__inner {
  position: relative;
}

.page-about .about-cover__crumb {
  margin-bottom: 32px;
}

.page-about .about-cover__kicker {
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-cover__title {
  margin: 0 0 26px;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 8.4vw, 4.4rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-cover__title em {
  font-style: normal;
  color: var(--yellow);
}

.page-about .about-cover__dek {
  margin: 0 0 44px;
  max-width: 56ch;
  font-family: var(--font-editorial);
  font-size: clamp(1rem, 2.6vw, 1.16rem);
  line-height: 1.92;
  color: var(--steel);
}

.page-about .about-cover__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  max-width: 780px;
  border: 1px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--ink-600);
  overflow: hidden;
}

.page-about .about-stat {
  padding: 18px 16px 20px;
  background: var(--ink-800);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--yellow);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 9px;
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--steel);
}

/* ---------- 品牌叙事（米白） ---------- */
.page-about .about-story {
  padding: 60px 0 56px;
}

.page-about .about-story__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-story__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink-900);
}

.page-about .about-story__lede {
  margin: 0 0 18px;
  font-family: var(--font-editorial);
  font-size: 1.06rem;
  line-height: 1.95;
  color: var(--ink-800);
}

.page-about .about-story__main p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.86;
  color: rgba(11, 15, 22, .78);
}

.page-about .about-story__figure {
  margin: 0;
}

.page-about .about-story__figure .media-frame__img {
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-story__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 46px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(11, 15, 22, .18);
}

.page-about .about-story__facts li {
  padding: 20px 16px 22px 0;
  border-bottom: 1px solid rgba(11, 15, 22, .1);
}

.page-about .about-story__fact-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--ink-700);
}

.page-about .about-story__fact-label {
  display: block;
  margin-top: 7px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: rgba(11, 15, 22, .58);
}

/* ---------- 覆盖面（深色） ---------- */
.page-about .about-coverage {
  padding: 68px 0 76px;
  background:
    linear-gradient(180deg, #0A1428 0%, #10203A 100%);
}

.page-about .about-coverage__head {
  max-width: 62ch;
  margin-bottom: 40px;
}

.page-about .about-coverage__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-coverage__note {
  margin: 0;
  font-size: .96rem;
  line-height: 1.86;
  color: var(--steel);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-coverage__figure {
  margin: 0;
}

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

.page-about .about-coverage__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-coverage__tag {
  font-family: var(--font-data);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-coverage__itemtitle {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-coverage__itemtext {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--steel);
}

/* ---------- 编辑组分工 ---------- */
.page-about .about-roles {
  padding: 64px 0 72px;
}

.page-about .about-roles__head {
  max-width: 60ch;
  margin-bottom: 36px;
}

.page-about .about-roles__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink-900);
}

.page-about .about-roles__note {
  margin: 0;
  font-size: .96rem;
  line-height: 1.86;
  color: rgba(11, 15, 22, .72);
}

.page-about .about-roles__tabs {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-roles__tab {
  display: block;
  width: 100%;
  padding: 20px 18px 22px;
  text-align: left;
  font-family: inherit;
  color: var(--text);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-roles__tab:hover {
  border-color: var(--ink-600);
  transform: translateY(-2px);
}

.page-about .about-roles__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-roles__tab[aria-selected="true"] {
  border-color: var(--yellow);
  box-shadow: inset 0 0 0 1px rgba(255, 210, 74, .3), 0 8px 22px rgba(11, 15, 22, .16);
}

.page-about .about-roles__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-roles__tab[aria-selected="true"] .about-roles__index {
  color: var(--orange);
}

.page-about .about-roles__name {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-roles__note {
  display: block;
  font-family: var(--font-body);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-roles__panel {
  padding: 26px 20px 28px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  color: var(--text);
}

.page-about .about-roles__panel-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.6vw, 1.6rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--yellow);
}

.page-about .about-roles__panel p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.86;
  color: var(--steel);
}

.page-about .about-roles__day {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-roles__day li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(44, 71, 103, .55);
  font-size: .9rem;
  line-height: 1.72;
  color: var(--white);
}

.page-about .about-roles__daytime {
  font-family: var(--font-data);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--cyan);
}

/* ---------- 数据质量 + 时间轴 ---------- */
.page-about .about-trust {
  padding: 68px 0 78px;
  background:
    linear-gradient(180deg, #0A1428 0%, #10203A 70%, #0A1428 100%);
}

.page-about .about-trust__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-trust__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-trust__copy p {
  margin: 0 0 16px;
  font-size: .98rem;
  line-height: 1.88;
  color: var(--steel);
}

.page-about .about-trust__figure {
  margin: 0;
}

.page-about .about-trust__figure .media-frame__img {
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-trust__timeline {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.page-about .about-trust__subhead {
  margin: 0 0 30px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(55, 240, 216, .22) 24%, rgba(44, 71, 103, .85) 62%, var(--yellow) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(55, 240, 216, .14);
  transition: background .26s var(--ease), box-shadow .26s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--yellow);
  box-shadow: 0 0 0 6px rgba(255, 210, 74, .2);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-data);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--steel);
}

.page-about .about-timeline__more {
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: .88rem;
  line-height: 1.8;
  color: rgba(143, 166, 196, .82);
  transition: max-height .4s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more {
  max-height: 260px;
  margin-top: 10px;
  opacity: 1;
}

/* ---------- 协作与认可 ---------- */
.page-about .about-credits {
  padding: 64px 0 72px;
}

.page-about .about-credits__head {
  max-width: 60ch;
}

.page-about .about-credits__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink-900);
}

.page-about .about-credits__note {
  margin: 0;
  font-size: .96rem;
  line-height: 1.86;
  color: rgba(11, 15, 22, .72);
}

.page-about .about-credits__grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

.page-about .about-credit {
  position: relative;
  padding: 22px 20px 24px;
  background: transparent;
  border: 1px solid rgba(11, 15, 22, .18);
  border-radius: var(--radius);
  box-shadow: 0 2px 10px rgba(11, 15, 22, .05);
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-credit:hover {
  border-color: var(--orange);
  box-shadow: 0 8px 22px rgba(11, 15, 22, .11);
  transform: translateY(-2px);
}

.page-about .about-credit__num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-about .about-credit__tag {
  display: block;
  margin: 10px 0 12px;
  font-family: var(--font-data);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-credit__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-about .about-credit p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: rgba(11, 15, 22, .74);
}

.page-about .about-credits__foot {
  margin: 40px 0 0;
  padding-top: 24px;
  border-top: 1px solid rgba(11, 15, 22, .16);
  font-size: .94rem;
  line-height: 1.9;
  color: rgba(11, 15, 22, .74);
}

.page-about .about-credits__foot a {
  color: var(--ink-800);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-credits__foot a:hover {
  color: var(--orange);
}

/* ---------- 交互降级 ---------- */
@media (hover: none) {
  .page-about .about-timeline__more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roles__tab,
  .page-about .about-credit,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__more {
    transition-duration: .12s;
    transform: none;
  }

  .page-about .about-timeline__more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }
}

/* ---------- 780px 以上 ---------- */
@media (min-width: 780px) {
  .page-about .about-cover {
    padding: calc(var(--header-h) + 80px) 0 88px;
  }

  .page-about .about-cover__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-story {
    padding: 80px 0 72px;
  }

  .page-about .about-story__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-story__facts li {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-about .about-story__facts li:first-child {
    padding-left: 0;
  }

  .page-about .about-coverage {
    padding: 84px 0 92px;
  }

  .page-about .about-roles {
    padding: 80px 0 88px;
  }

  .page-about .about-roles__panel {
    padding: 34px 32px 36px;
  }

  .page-about .about-trust {
    padding: 84px 0 92px;
  }

  .page-about .about-trust__timeline {
    margin-top: 68px;
    padding-top: 48px;
  }

  .page-about .about-credits {
    padding: 80px 0 88px;
  }
}

/* ---------- 900px 以上：非对称栏栅 ---------- */
@media (min-width: 900px) {
  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-story__figure {
    margin-top: 44px;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-coverage__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0 24px;
    align-items: start;
  }

  .page-about .about-coverage__itemtitle {
    margin-top: -2px;
  }

  .page-about .about-trust__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-trust__figure {
    margin-top: 52px;
  }
}

/* ---------- 860px 以上：岗位卡片错位 ---------- */
@media (min-width: 860px) {
  .page-about .about-roles__tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
    margin-bottom: 24px;
  }

  .page-about .about-roles__tab:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-roles__tab:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .about-credits__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 22px;
    margin-top: 44px;
  }

  .page-about .about-credit:nth-child(1) {
    grid-column: 1 / span 5;
  }

  .page-about .about-credit:nth-child(2) {
    grid-column: 6 / span 4;
    margin-top: 32px;
  }

  .page-about .about-credit:nth-child(3) {
    grid-column: 10 / span 3;
    margin-top: 64px;
  }
}