.page-about {
  --about-rail-w: 12rem;
}

.page-about .about-layout > *,
.page-about .about-team > *,
.page-about .about-do > *,
.page-about .about-columns > * {
  min-width: 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(1.25rem, 3vw, 2.25rem) clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-hero__title {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 6vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin-top: 1.15rem;
  max-width: 48ch;
}

.page-about .about-hero__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 2.6vw, 1.9rem);
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--green), rgba(47, 191, 113, 0));
}

.page-about .about-hero__panel-label {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.15rem 1.25rem;
}

.page-about .about-stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-stats .stat__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 4rem);
  }
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  padding-block: clamp(1.5rem, 3vw, 2.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(1.25rem, 4vw, 2.5rem);
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }
}

/* ---------- 左侧章节轨道 ---------- */

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

.page-about .about-toc__title {
  display: none;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.8rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: 0.84rem;
  line-height: 1.2;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--green);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--white);
  background: rgba(47, 191, 113, 0.09);
  border-color: rgba(123, 224, 168, 0.4);
}

.page-about .about-toc__link:focus-visible {
  outline: 2px solid var(--green-line);
  outline-offset: 2px;
}

@media (min-width: 1000px) {
  .page-about .about-toc {
    position: sticky;
    top: clamp(5rem, 12vh, 7rem);
    align-self: start;
  }

  .page-about .about-toc__title {
    display: block;
    margin: 0 0 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.24em;
    color: var(--mist);
  }

  .page-about .about-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.15rem;
  }

  .page-about .about-toc__link {
    width: 100%;
    border-radius: var(--radius-md);
  }
}

@keyframes about-toc-lit {
  0%, 15% { color: var(--mist); }
  32%, 70% { color: var(--white); }
  90%, 100% { color: var(--mist); }
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) and (min-width: 1000px) {
    .page-about {
      timeline-scope: --about-s1, --about-s2, --about-s3, --about-s4, --about-s5;
    }

    .page-about .about-sec--1 { view-timeline-name: --about-s1; }
    .page-about .about-sec--2 { view-timeline-name: --about-s2; }
    .page-about .about-sec--3 { view-timeline-name: --about-s3; }
    .page-about .about-sec--4 { view-timeline-name: --about-s4; }
    .page-about .about-sec--5 { view-timeline-name: --about-s5; }

    .page-about .about-toc__link--1 { animation: about-toc-lit linear both; animation-timeline: --about-s1; animation-range: cover 12% cover 72%; }
    .page-about .about-toc__link--2 { animation: about-toc-lit linear both; animation-timeline: --about-s2; animation-range: cover 12% cover 72%; }
    .page-about .about-toc__link--3 { animation: about-toc-lit linear both; animation-timeline: --about-s3; animation-range: cover 12% cover 72%; }
    .page-about .about-toc__link--4 { animation: about-toc-lit linear both; animation-timeline: --about-s4; animation-range: cover 12% cover 72%; }
    .page-about .about-toc__link--5 { animation: about-toc-lit linear both; animation-timeline: --about-s5; animation-range: cover 12% cover 72%; }
  }
}

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  padding-block: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 6rem;
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: clamp(0.6rem, 1.5vw, 1rem);
  margin-bottom: 1rem;
}

.page-about .about-sec__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--green);
}

.page-about .about-sec .section-title {
  margin: 0;
}

.page-about .about-sec .prose {
  max-width: 66ch;
}

.page-about .about-sec .prose p {
  margin: 0 0 0.85rem;
}

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

.page-about .media-frame img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* ---------- 01 日常条目 ---------- */

.page-about .about-do {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-do__item {
  display: flex;
  gap: 0.8rem;
  padding: 1.05rem 1.15rem;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-do__item:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .about-do__dot {
  flex: 0 0 auto;
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.6rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(47, 191, 113, 0.14);
}

.page-about .about-do__title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--white);
}

.page-about .about-do__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

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

/* ---------- 02 团队分工 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-top: 1.75rem;
}

.page-about .about-team__cols {
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team__col {
  padding: 1.15rem 1.25rem;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-lg);
}

.page-about .about-team__col--device {
  border-left-color: var(--blue);
}

.page-about .about-team__kicker {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-team__col p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

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

@media (min-width: 1020px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 03 赛季栏目 ---------- */

.page-about .about-columns__media {
  margin: 1.5rem 0 0;
}

.page-about .about-columns {
  list-style: none;
  counter-reset: aboutcol;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-columns__item {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(47, 191, 113, 0.07), rgba(22, 33, 30, 0) 62%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-columns__item:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .about-columns__item::before {
  counter-increment: aboutcol;
  content: "0" counter(aboutcol);
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-about .about-columns__item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  color: var(--white);
}

.page-about .about-columns__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

/* ---------- 04 服务与支持 ---------- */

.page-about .about-figures {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-figure {
  padding: 1.15rem 1.2rem;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-about .about-figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--green);
}

.page-about .about-figure__value small {
  margin-left: 0.12em;
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-reach__link {
  margin: 1.5rem 0 0;
}

@media (min-width: 700px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 05 版本时间线 ---------- */

.page-about .about-track__media {
  margin: 0 0 1.75rem;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

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

.page-about .about-track__pin {
  display: none;
}

.page-about .about-track__fold {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-track__fold:hover {
  border-color: var(--line-strong);
}

.page-about .about-track__fold .fold__summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
}

.page-about .about-track__stage {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-track__time {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--green);
}

.page-about .about-track__fold .fold__body {
  padding: 0 1.05rem 1rem;
}

.page-about .about-track__fold .fold__body p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-about .about-track {
    position: relative;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .about-track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0.55rem;
    height: 3px;
    border-radius: var(--radius-pill);
    background: repeating-linear-gradient(
      90deg,
      var(--concrete) 0 14px,
      rgba(110, 122, 117, 0) 14px 26px
    );
    opacity: 0.45;
  }

  .page-about .about-track__node {
    padding-top: 1.5rem;
  }

  .page-about .about-track__pin {
    display: block;
    position: absolute;
    left: 1.1rem;
    top: 0.55rem;
    width: 0.8rem;
    height: 0.8rem;
    border-radius: 50%;
    background: var(--green);
    border: 3px solid var(--ink);
    transform: translate(-50%, -50%);
    z-index: 2;
  }
}

/* ---------- 尾部落点 ---------- */

.page-about .about-next {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-next .section-title {
  margin: 0.4rem 0 1.5rem;
}

.page-about .about-next__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
}

.page-about .about-next__card .card__body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-next__more {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--green);
}

@media (min-width: 760px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem;
  }
}

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 420px) {
  .page-about .about-stats {
    gap: 0.9rem 0.75rem;
  }

  .page-about .about-toc__link {
    font-size: 0.8rem;
    padding: 0.38rem 0.7rem;
  }
}
<<<END>>>