.page-about {
  --about-rail-w: 132px;
  background: var(--ink);
  color: var(--cream);
  overflow-x: hidden;
  padding-top: clamp(16px, 3vw, 32px);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mauve);
  padding-bottom: clamp(18px, 4vw, 40px);
}

.page-about .about-crumb a {
  color: var(--mauve);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--blue);
  border-color: var(--blue);
}

.page-about .about-crumb__sep {
  opacity: .5;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(12px, 3vw, 32px) 0 clamp(48px, 9vw, 112px);
  isolation: isolate;
}

.page-about .about-hero__glow {
  position: absolute;
  top: -18%;
  right: -24%;
  width: min(78vw, 760px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(255, 122, 26, .40), rgba(255, 122, 26, 0) 66%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__slant {
  position: absolute;
  right: -6%;
  bottom: 0;
  width: 52%;
  height: 74%;
  background: linear-gradient(142deg, rgba(255, 197, 61, .17), rgba(53, 208, 255, .05));
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  max-width: 17ch;
  margin: 18px 0 24px;
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1.04;
}

.page-about .about-hero__lead {
  max-width: 47ch;
  color: var(--cream);
  opacity: .9;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mauve);
}

.page-about .about-hero__fact b {
  display: inline-block;
  margin-right: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--yellow);
  letter-spacing: .04em;
}

/* ---------- 主栅格 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-bottom: clamp(40px, 8vw, 96px);
}

.page-about .about-rail {
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--yellow);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mauve);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--yellow);
  letter-spacing: .06em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--cream);
  border-color: var(--blue);
  background: rgba(53, 208, 255, .08);
}

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

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  padding: clamp(44px, 8vw, 104px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-sec__title {
  margin: 14px 0 0;
  font-weight: 300;
  letter-spacing: -.015em;
  line-height: 1.12;
  max-width: 20ch;
}

.page-about .about-sec__lead {
  margin-top: 18px;
  max-width: 44ch;
  color: var(--mauve);
  font-size: 17px;
  line-height: 1.75;
}

.page-about .about-sec__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-sec__text p {
  margin: 0 0 1.1em;
  max-width: 36em;
}

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

.page-about .about-sec__media {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  margin: 0;
}

.page-about .about-sec__img,
.page-about .about-creed__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-width: 100%;
}

.page-about .about-sec__foot {
  margin: clamp(28px, 4vw, 44px) 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mauve);
}

.page-about .about-link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 255, .45);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--cream);
  border-color: var(--cream);
}

/* ---------- 轻快三件事 ---------- */

.page-about .about-creed {
  display: grid;
  gap: 20px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-creed__item {
  padding: clamp(22px, 3vw, 32px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px 28px 76px 28px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-creed__item--lime {
  background: var(--lime);
  color: var(--ink);
  border-color: transparent;
  border-radius: 28px 76px 28px 28px;
}

.page-about .about-creed__item--juice {
  background: var(--orange);
  color: var(--ink);
  border-color: transparent;
  border-radius: 76px 28px 28px 28px;
}

.page-about .about-creed__item:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
}

.page-about .about-creed__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  opacity: .7;
  margin-bottom: 14px;
}

.page-about .about-creed__title {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
}

.page-about .about-creed__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  opacity: .88;
}

.page-about .about-creed__fig {
  margin: 8px 0 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* ---------- 引用句 ---------- */

.page-about .about-quote {
  padding: clamp(56px, 11vw, 132px) 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 12% 82%, rgba(168, 230, 58, .14), transparent 56%),
    radial-gradient(circle at 88% 18%, rgba(255, 59, 92, .13), transparent 54%);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(40px, 9vw, 118px);
  line-height: 1.02;
  letter-spacing: -.035em;
  color: var(--cream);
  max-width: 12ch;
}

.page-about .about-quote__note {
  margin: clamp(20px, 3vw, 34px) 0 0;
  max-width: 34em;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--yellow);
  line-height: 1.8;
}

/* ---------- 版本时间线 ---------- */

.page-about .about-tl-wrap {
  position: relative;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 36px) 0;
  isolation: isolate;
}

.page-about .about-tl__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
  border-radius: var(--radius);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-tl-scale {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 28px);
  padding: 0 4px;
}

.page-about .about-tl-scale::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 197, 61, .7), rgba(255, 122, 26, .25));
  z-index: -1;
}

.page-about .about-tl-scale__node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--ink);
  border: 1px solid var(--yellow);
  color: var(--yellow);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .about-tl {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
}

.page-about .about-tl__item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(36, 26, 54, .88);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .about-tl__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  padding: 14px 18px;
  background: none;
  border: 0;
  color: var(--cream);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-tl__trigger:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-about .about-tl__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink);
  background: var(--yellow);
  padding: 4px 10px;
  border-radius: 999px;
}

.page-about .about-tl__label {
  font-size: 16px;
  line-height: 1.5;
}

.page-about .about-tl__panel {
  padding: 0 18px 18px;
}

.page-about .about-tl__panel p {
  margin: 0 0 .9em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mauve);
  max-width: 42em;
}

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

/* ---------- 团队 ---------- */

.page-about .about-crew {
  margin-top: clamp(26px, 4vw, 40px);
  display: grid;
  gap: 0;
}

.page-about .about-crew__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(20px, 3vw, 28px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-crew__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-crew__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--yellow);
}

.page-about .about-crew__name {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-crew__body p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mauve);
}

/* ---------- 节奏 ---------- */

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

.page-about .about-rhythm {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-rhythm__item {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(36, 26, 54, .95), rgba(20, 14, 31, .6));
  border-left: 3px solid var(--cherry);
}

.page-about .about-rhythm__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cherry);
}

.page-about .about-rhythm__name {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-rhythm__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mauve);
  max-width: 44em;
}

/* ---------- 运营信息 ---------- */

.page-about .about-sec--operator {
  padding-bottom: clamp(24px, 5vw, 48px);
}

.page-about .about-operator {
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .about-operator__list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-operator__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-operator__row:last-child {
  border-bottom: 0;
}

.page-about .about-operator__row dt {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mauve);
}

.page-about .about-operator__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-operator__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mauve);
  max-width: 46em;
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  padding: clamp(40px, 7vw, 80px) 0 clamp(8px, 2vw, 24px);
}

.page-about .about-next__inner {
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 92% 12%, rgba(255, 197, 61, .22), transparent 58%),
    linear-gradient(150deg, rgba(255, 122, 26, .16), rgba(20, 14, 31, .2));
  border: 1px solid var(--line-strong);
}

.page-about .about-next__lead {
  margin: 0 0 22px;
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 300;
  line-height: 1.4;
  color: var(--cream);
  max-width: 22ch;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-crew__row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-about .about-operator__row {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 860px) {
  .page-about .about-sec__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-sec__media {
    margin-top: 8px;
  }

  .page-about .about-creed {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-creed__item:nth-child(2) {
    margin-top: 58px;
  }

  .page-about .about-creed__item:nth-child(3) {
    margin-top: 22px;
  }

  .page-about .about-creed__fig {
    grid-column: 1 / -1;
    margin-top: 34px;
    max-height: 320px;
  }

  .page-about .about-creed__img {
    height: 320px;
    object-position: center 42%;
  }

  .page-about .about-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    padding-bottom: 0;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    border: 0;
    border-left: 1px solid var(--line-strong);
    border-radius: 0;
    padding: 12px 0 12px 16px;
    background: none;
    white-space: normal;
    display: block;
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  }

  .page-about .about-rail__num {
    display: block;
    font-size: clamp(26px, 3vw, 38px);
    font-weight: 300;
    line-height: 1.05;
    letter-spacing: -.02em;
    color: var(--orange);
    margin-bottom: 4px;
  }

  .page-about .about-rail__text {
    display: block;
    font-size: 13px;
    letter-spacing: .1em;
    color: var(--mauve);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--orange);
    background: none;
    color: var(--cream);
  }

  .page-about .about-rail__link:hover .about-rail__text,
  .page-about .about-rail__link:focus-visible .about-rail__text {
    color: var(--cream);
  }

  .page-about .about-sec__title {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-creed__item,
  .page-about .about-rail__link,
  .page-about .about-tl__item,
  .page-about .about-link {
    transition: none;
  }

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