.page-about {
  --about-line: rgba(27, 44, 72, 0.85);
  --about-dash: rgba(143, 163, 191, 0.26);
  background: var(--ink-void);
  color: var(--chalk);
  overflow-x: clip;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(18px, 4vw, 38px);
  background:
    radial-gradient(118% 88% at 80% 0%, rgba(255, 106, 26, 0.14) 0%, rgba(255, 106, 26, 0) 58%),
    linear-gradient(180deg, var(--ink-void) 0%, var(--ink-void) 60%, rgba(10, 18, 32, 0.92) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 8.4vw, 74px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(18px, 4vw, 42px);
  margin: 24px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-line);
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__facts strong {
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-hero__facts li:nth-child(2) strong {
  color: var(--compete);
}

.page-about .about-hero__facts span {
  font-size: 13px;
  color: var(--mist);
}

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

.page-about .about-hero__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mist);
}

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: end;
    column-gap: clamp(24px, 4vw, 52px);
  }

  .page-about .about-hero__aside {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
  }

  .page-about .about-hero__note {
    writing-mode: vertical-rl;
    max-height: 240px;
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-layout {
  display: grid;
  padding-bottom: clamp(40px, 7vw, 84px);
}

.page-about .about-stream {
  min-width: 0;
}

.page-about .about-index {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 6px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index::-webkit-scrollbar {
  display: none;
}

.page-about .about-index .chapter-index__label {
  flex: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-index .chapter-index__list {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index .chapter-index__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 0;
  white-space: nowrap;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}

.page-about .about-index .chapter-index__link:hover {
  color: var(--chalk);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--compete);
}

.page-about .about-index .chapter-index__link[aria-current="true"] {
  color: var(--chalk);
}

.page-about .about-index .chapter-index__link[aria-current="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--compete);
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 148px minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 58px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin: 0;
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--about-line);
    overflow: visible;
  }

  .page-about .about-index .chapter-index__list {
    flex-direction: column;
    gap: 14px;
  }

  .page-about .about-index .chapter-index__link[aria-current="true"]::after {
    left: -17px;
    right: auto;
    top: 2px;
    bottom: 2px;
    width: 2px;
    height: auto;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-block {
  padding: clamp(34px, 6vw, 68px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-block:first-child {
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 0;
}

.page-about .about-block__title {
  margin: 12px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.2vw, 40px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-block__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  letter-spacing: 0.01em;
  color: var(--mist);
}

/* ---------- 01 服务对象 ---------- */
.page-about .about-who {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-who__item {
  padding: 22px 22px 24px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--compete);
  border-radius: var(--radius-l);
  background: linear-gradient(165deg, var(--ink-raise), rgba(10, 18, 32, 0.62));
}

.page-about .about-who__item:nth-child(2) {
  border-left-color: var(--turf);
}

.page-about .about-who__item:nth-child(3) {
  border-left-color: var(--mist);
}

.page-about .about-who__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--chalk);
}

.page-about .about-who__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-who {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }

  .page-about .about-who__item:nth-child(2) {
    margin-top: 40px;
  }

  .page-about .about-who__item:nth-child(3) {
    margin-top: 80px;
  }
}

/* ---------- 02 赛季轨迹 ---------- */
.page-about .about-intro {
  display: grid;
  gap: 22px;
}

.page-about .about-intro__media {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(24px, 4vw, 44px);
  }
}

.page-about .about-track {
  display: grid;
  gap: 6px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--steel);
  list-style: none;
}

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

.page-about .about-track__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border: 2px solid var(--ink-void);
  border-radius: 50%;
  background: var(--turf);
}

.page-about .about-season__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-season__year {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--chalk);
  transition: color 0.24s var(--ease);
}

.page-about .about-season[open] .about-season__year {
  color: var(--compete);
}

.page-about .about-season__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-season__body {
  padding: 0 0 14px;
  max-width: 44ch;
}

.page-about .about-season__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-track {
    grid-auto-flow: column;
    grid-auto-columns: minmax(178px, 1fr);
    gap: 0 8px;
    padding-left: 0;
    border-left: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: thin;
  }

  .page-about .about-track__node {
    border-top: 2px solid var(--steel);
    padding-top: 20px;
  }

  .page-about .about-track__node::before {
    left: 12px;
    top: 1px;
  }

  .page-about .about-season__summary {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 8px 0;
  }
}

/* ---------- 03 取舍原则 ---------- */
.page-about .about-rules {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-rule {
  padding: 20px 22px;
  border: 1px solid var(--about-line);
  border-radius: 24px 24px 24px 6px;
  background: linear-gradient(150deg, var(--ink-raise), rgba(10, 18, 32, 0.78));
}

.page-about .about-rule:nth-of-type(2) {
  border-color: rgba(255, 106, 26, 0.3);
  border-radius: 6px 24px 24px 24px;
  background: linear-gradient(150deg, rgba(255, 106, 26, 0.11), rgba(10, 18, 32, 0.82));
}

.page-about .about-rule:nth-of-type(3) {
  border-radius: 24px 6px 24px 24px;
}

.page-about .about-rule__summary {
  display: grid;
  gap: 6px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-rule__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--compete);
}

.page-about .about-rule:nth-of-type(2) .about-rule__kicker {
  color: var(--warm);
}

.page-about .about-rule__title {
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-rule__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--about-dash);
}

.page-about .about-rule__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-rule__body .about-rule__case {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--steel);
  font-size: 14px;
  line-height: 1.72;
}

@media (min-width: 900px) {
  .page-about .about-rule {
    width: 86%;
  }

  .page-about .about-rule:nth-of-type(2) {
    margin-left: auto;
  }

  .page-about .about-rule:nth-of-type(3) {
    margin-left: 7%;
  }
}

/* ---------- 04 谁在值守 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 20px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-stat {
  padding-top: 16px;
  border-top: 2px solid var(--about-line);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 84px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--chalk);
}

.page-about .about-stat__num--hot {
  color: var(--compete);
}

.page-about .about-stat__num--turf {
  color: var(--turf);
}

.page-about .about-stat__cap {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-method {
  margin-top: clamp(22px, 3vw, 34px);
  max-width: 62ch;
}

.page-about .about-method p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

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

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(22px, 4vw, 34px);
  }
}

/* ---------- 05 一起记录 ---------- */
.page-about .about-community {
  display: grid;
  gap: 24px;
}

.page-about .about-community__body {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-community__cta {
  margin-top: 20px;
}

.page-about .about-community__media {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-community {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(24px, 4vw, 48px);
  }
}

/* ---------- 收束入口 ---------- */
.page-about .about-next {
  padding: clamp(32px, 5vw, 58px) 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-next__links {
  display: grid;
  gap: 14px;
}

.page-about .about-next__link {
  display: grid;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: rgba(16, 27, 46, 0.62);
  text-decoration: none;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-next__link:hover {
  border-color: var(--compete);
  transform: translateY(-2px);
}

.page-about .about-next__label {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--chalk);
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index .chapter-index__link,
  .page-about .about-season__year,
  .page-about .about-next__link {
    transition-duration: 0.01ms;
  }

  .page-about .about-next__link:hover {
    transform: none;
  }
}
<<<END>>>