.page-about {
  --about-pad-y: clamp(52px, 8vw, 100px);
  --about-gap: clamp(24px, 3.4vw, 40px);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
}

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

.page-about .figure__media {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--ink-green);
}

.page-about .figure__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .figure__caption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--text-soft);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--about-pad-y) * .58) 0 var(--about-pad-y);
  background:
    radial-gradient(circle at 86% 10%, rgba(56, 242, 200, .20), transparent 48%),
    radial-gradient(circle at 6% 92%, rgba(178, 58, 143, .22), transparent 46%),
    linear-gradient(158deg, var(--ink-green) 0%, var(--rail-blue) 58%, var(--indigo) 100%);
  color: var(--white);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--hair-cyan) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hair-cyan) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 92%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 92%);
}

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

.page-about .breadcrumb {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero .breadcrumb li {
  font-size: 13px;
  color: rgba(255, 255, 255, .62);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, .78);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero .breadcrumb li:last-child {
  color: var(--white);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--kiwi);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(31px, 5.6vw, 60px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__text {
  margin: 0 0 28px;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(255, 255, 255, .82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .about-stat {
  padding: 16px 18px;
  border: 1px solid var(--hair-cyan);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .05);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .62);
}

.page-about .about-stat__value {
  margin: 6px 0 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
  color: var(--cyan);
}

@media (min-width: 560px) and (max-width: 899px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

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

/* ============ 通用区块 ============ */
.page-about .about-section {
  padding: var(--about-pad-y) 0;
}

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

.page-about .about-section--dark {
  background:
    radial-gradient(circle at 84% 4%, rgba(56, 242, 200, .14), transparent 46%),
    linear-gradient(170deg, var(--ink-green) 0%, var(--rail-blue) 100%);
  color: var(--white);
}

.page-about .section-head {
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .section-head__title {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.01em;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.25;
}

.page-about .about-section--dark .section-head__title {
  color: var(--white);
}

.page-about .about-section--dark .section-head__index {
  color: var(--cyan);
}

/* ============ 版本历程 ============ */
.page-about .about-history__lead {
  margin: 0 0 clamp(28px, 4vw, 44px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--kiwi), rgba(140, 198, 63, .28) 62%, transparent);
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 46px;
  margin-bottom: 14px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 24px;
  width: 15px;
  height: 15px;
  border-radius: var(--radius-pill);
  background: var(--paper);
  border: 2px solid var(--kiwi);
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-tl__item:has(.about-tl__node[open])::before {
  background: var(--kiwi);
  box-shadow: 0 0 0 4px rgba(140, 198, 63, .22);
}

.page-about .about-tl__node {
  overflow: hidden;
  border: 1px solid var(--hair-soft);
  border-left-width: 4px;
  border-radius: var(--radius-lg);
  background: var(--white);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-tl__item--1 .about-tl__node { border-left-color: var(--kiwi); }
.page-about .about-tl__item--2 .about-tl__node { border-left-color: var(--mango); }
.page-about .about-tl__item--3 .about-tl__node { border-left-color: var(--dragon); }
.page-about .about-tl__item--4 .about-tl__node { border-left-color: var(--cyan); }

.page-about .about-tl__node[open] {
  box-shadow: var(--shadow-soft);
}

.page-about .about-tl__node summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-tl__node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__node summary::marker {
  content: "";
}

.page-about .about-tl__node summary:focus-visible {
  outline: 2px solid var(--mango);
  outline-offset: -2px;
}

.page-about .about-tl__year {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--kiwi-deep);
}

.page-about .about-tl__name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--ink-green);
}

.page-about .about-tl__chev {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-pill);
  background: var(--kiwi-soft);
}

.page-about .about-tl__chev::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--kiwi-deep);
  border-bottom: 2px solid var(--kiwi-deep);
  transform: translate(-50%, -70%) rotate(45deg);
  transition: transform .2s var(--ease);
}

.page-about .about-tl__node[open] .about-tl__chev::before {
  transform: translate(-50%, -30%) rotate(-135deg);
}

.page-about .about-tl__panel {
  padding: 0 20px 20px;
}

.page-about .about-tl__panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--text);
}

.page-about .about-history__figure {
  margin: clamp(32px, 4.6vw, 52px) 0 0;
}

.page-about .about-history__figure .figure__media {
  aspect-ratio: 10 / 7;
}

/* ============ 团队分工 ============ */
.page-about .about-team__lead {
  margin: 0 0 clamp(26px, 3.6vw, 38px);
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 0 0 clamp(32px, 4.6vw, 48px);
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .about-flow__step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-pill);
  background: var(--kiwi-soft);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink-green);
}

.page-about .about-flow__n {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--kiwi-deep);
}

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

  .page-about .about-flow__step {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    border-radius: var(--radius-md);
  }
}

.page-about .about-team__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-team__filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .about-team__filter .filter-bar__label {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--text-soft);
  margin-right: 4px;
}

.page-about .about-team__filter .filter-pill[aria-pressed="true"] {
  background: var(--kiwi);
  border-color: var(--kiwi);
  color: var(--ink-green);
  font-weight: 700;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 20px;
}

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

.page-about .about-role {
  border-left: 4px solid var(--hair);
  border-radius: var(--radius-lg);
  transition: opacity .2s var(--ease);
}

.page-about .about-role[data-tags="数据标注"] { border-left-color: var(--kiwi); }
.page-about .about-role[data-tags="球队资料"] { border-left-color: var(--mango); }
.page-about .about-role[data-tags="规则校订"] { border-left-color: var(--dragon); }
.page-about .about-role[data-tags="内容编辑"] { border-left-color: var(--cyan); }

.page-about .about-role .card__index {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--kiwi-deep);
  margin: 0 0 8px;
}

.page-about .about-role .card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-green);
}

.page-about .about-role .card__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--text-soft);
}

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

.page-about .about-team__figure .figure__media {
  aspect-ratio: 3 / 2;
}

@media (min-width: 1000px) {
  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 92px;
  }
}

/* ============ 本地协作网络 ============ */
.page-about .about-network__figure {
  margin: 0 0 clamp(26px, 3.6vw, 38px);
}

.page-about .about-network__media {
  position: relative;
  aspect-ratio: 16 / 9;
}

.page-about .about-network__badge {
  position: absolute;
  left: 18px;
  bottom: 18px;
  margin: 0;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: rgba(11, 58, 60, .82);
  border: 1px solid var(--hair-cyan);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--white);
  backdrop-filter: blur(6px);
}

.page-about .about-network__badge .num {
  font-family: var(--font-num);
  font-size: 20px;
  color: var(--cyan);
  margin-right: 4px;
}

.page-about .about-network__text {
  margin: 0 0 clamp(26px, 3.6vw, 38px);
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .82);
}

.page-about .about-network__cards {
  gap: 14px;
}

.page-about .about-net-card {
  padding: 22px 22px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hair-cyan);
  background: rgba(255, 255, 255, .05);
}

.page-about .about-net-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--cyan);
}

.page-about .about-net-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(255, 255, 255, .76);
}

/* ============ 服务对象 ============ */
.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 860px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

.page-about .about-audience__item {
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 3vw, 32px);
  border-radius: var(--radius-xl);
  color: var(--white);
}

.page-about .about-audience__item--readers {
  background: linear-gradient(158deg, var(--ink-green), #14483A);
}

.page-about .about-audience__item--clubs {
  background: linear-gradient(158deg, var(--indigo), #3A2A57);
}

.page-about .about-audience__item--partners {
  background: linear-gradient(158deg, var(--wine), #8E2A43);
}

.page-about .about-audience__tag {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-audience__item--clubs .about-audience__tag {
  color: var(--mango);
}

.page-about .about-audience__item--partners .about-audience__tag {
  color: var(--kiwi-soft);
}

.page-about .about-audience__item h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-audience__item p {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .8);
}

.page-about .about-audience__link {
  margin-top: auto;
  align-self: flex-start;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, .38);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  transition: background .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
}

.page-about .about-audience__link:hover {
  background: var(--white);
  border-color: var(--white);
  color: var(--ink-green);
}

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

/* ============ 数据更新节奏 ============ */
.page-about .about-facts {
  margin: 0 0 clamp(30px, 4vw, 44px);
  border-top: 1px solid var(--hair);
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 720px) {
  .page-about .about-facts__row {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }
}

.page-about .about-facts__row dt {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 800;
  color: var(--ink-green);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-facts__row dd .num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 17px;
  color: var(--kiwi-deep);
}

.page-about .about-reliable__foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 820px) {
  .page-about .about-reliable__foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

.page-about .about-reliable__note {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-reliable__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}