.page-about {
  --about-rail-w: 200px;
  background: var(--ivory);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(30px, 5vw, 68px);
  padding-bottom: clamp(104px, 14vw, 176px);
  background-color: var(--table-green);
  background-image:
    radial-gradient(720px 400px at 88% -12%, rgba(44, 232, 213, 0.26), transparent 70%),
    radial-gradient(520px 340px at 4% 106%, rgba(255, 61, 139, 0.18), transparent 72%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: -2px;
  height: clamp(42px, 6vw, 68px);
  background: var(--ivory);
  transform: skewY(-2.2deg);
  transform-origin: 100% 100%;
  pointer-events: none;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(246, 241, 231, 0.6);
}

.page-about .breadcrumb a {
  color: var(--neon-cyan);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-hero .eyebrow {
  color: var(--neon-cyan);
  margin: 0;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  color: var(--on-dark-strong);
}

.page-about .about-hero .lede {
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  max-width: 40em;
  color: var(--on-dark);
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-versions {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius-lg);
  border-top-right-radius: 54px;
  background: rgba(11, 18, 38, 0.55);
  border: 1px solid var(--line-dark);
}

.page-about .about-versions__cap {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(226, 185, 74, 0.9);
}

.page-about .about-versions__wall {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-versions__wall li {
  font-size: 11px;
  letter-spacing: 0.05em;
  color: rgba(246, 241, 231, 0.6);
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  padding: 4px 9px;
}

.page-about .about-versions__wall li:nth-last-child(-n + 3) {
  color: var(--night-blue);
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  font-weight: 700;
}

/* ---------- 主体外壳 ---------- */
.page-about .about-shell {
  position: relative;
  padding-top: clamp(30px, 5vw, 56px);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-about .about-shell__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

/* ---------- 左侧刻度轴 ---------- */
.page-about .about-rail {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  align-self: start;
  z-index: 3;
  background: var(--ivory);
  padding-bottom: 6px;
}

.page-about .about-rail__cap {
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-light);
  text-decoration: none;
  color: var(--on-light-soft);
  font-size: 13px;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-rail__tick {
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
  border-color: var(--line-cyan);
}

.page-about .about-rail__link[data-active],
.page-about .about-rail__link[aria-current] {
  color: var(--table-green);
  border-color: var(--chip-magenta);
  background: rgba(255, 61, 139, 0.08);
  font-weight: 700;
}

.page-about .about-rail__link[data-active] .about-rail__tick,
.page-about .about-rail__link[aria-current] .about-rail__tick {
  color: var(--chip-magenta);
}

/* ---------- 内容流 ---------- */
.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 7vw, 92px);
  min-width: 0;
}

.page-about .about-section {
  position: relative;
  min-width: 0;
}

.page-about .about-section__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-section .eyebrow {
  margin: 0;
  color: var(--chip-magenta);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-section h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--table-green);
}

.page-about .about-section__intro {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--on-light-soft);
}

.page-about .about-section__intro + .about-section__intro {
  margin-top: 10px;
}

.page-about .about-section__tail {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 38em;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--on-light-soft);
}

.page-about .about-section__tail a {
  color: var(--table-green);
  text-decoration: underline;
  text-decoration-color: var(--neon-cyan);
  text-underline-offset: 3px;
}

/* ---------- 深色面板通用 ---------- */
.page-about .about-section--journey,
.page-about .about-section--reach,
.page-about .about-section--contact {
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 50px);
  overflow: hidden;
}

.page-about .about-section--journey {
  background: var(--night-blue);
}

.page-about .about-section--reach {
  background: var(--table-green);
}

.page-about .about-section--contact {
  background: var(--night-blue);
}

.page-about .about-section--journey h2,
.page-about .about-section--reach h2,
.page-about .about-section--contact h2 {
  color: var(--on-dark-strong);
}

.page-about .about-section--journey .eyebrow,
.page-about .about-section--reach .eyebrow,
.page-about .about-section--contact .eyebrow {
  color: var(--neon-cyan);
}

.page-about .about-section--journey .about-section__intro,
.page-about .about-section--reach .about-section__intro,
.page-about .about-section--contact .about-section__intro {
  color: var(--on-dark);
}

.page-about .about-section--contact::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -110px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 61, 139, 0.3), transparent 70%);
  pointer-events: none;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon-cyan), var(--gold) 55%, var(--chip-magenta));
  opacity: 0.55;
}

.page-about .about-timeline .timeline__item {
  position: relative;
  padding: 0 0 clamp(22px, 3vw, 30px) 34px;
}

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

.page-about .about-timeline .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--night-blue);
  border: 2px solid var(--neon-cyan);
}

.page-about .about-timeline .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-timeline .timeline__body h3 {
  margin: 0 0 6px;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--on-dark-strong);
}

.page-about .about-timeline .timeline__body p {
  margin: 0;
  max-width: 38em;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--on-dark);
}

/* ---------- 媒体框 ---------- */
.page-about .media-frame {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--night-blue);
}

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

.page-about .media-frame__caption {
  padding: 10px 14px 12px;
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--on-dark);
  background: var(--night-blue);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name num"
    "bar bar"
    "desc desc";
  gap: 6px 12px;
}

.page-about .about-roles__name {
  grid-area: name;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .about-roles__num {
  grid-area: num;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--chip-magenta);
  align-self: center;
}

.page-about .about-roles__bar {
  grid-area: bar;
  display: block;
  height: 6px;
  border-radius: 999px;
  background: rgba(17, 19, 24, 0.08);
  overflow: hidden;
}

.page-about .about-roles__bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--neon-cyan), var(--arcade-green));
}

.page-about .about-roles__item:nth-child(1) .about-roles__bar i { width: 100%; }
.page-about .about-roles__item:nth-child(2) .about-roles__bar i { width: 86%; }
.page-about .about-roles__item:nth-child(3) .about-roles__bar i { width: 71%; }
.page-about .about-roles__item:nth-child(4) .about-roles__bar i { width: 43%; }

.page-about .about-roles__desc {
  grid-area: desc;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--on-light-soft);
}

/* ---------- 内容体系 ---------- */
.page-about .about-library {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .about-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-cats__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--neon-cyan);
}

.page-about .about-cats__item:nth-child(3n + 2) { border-left-color: var(--chip-magenta); }
.page-about .about-cats__item:nth-child(3n + 3) { border-left-color: var(--gold); }

.page-about .about-cats__idx {
  grid-row: 1;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
  align-self: center;
}

.page-about .about-cats__name {
  grid-row: 1;
  font-weight: 700;
  font-size: 0.96rem;
  color: var(--ink);
}

.page-about .about-cats__desc {
  grid-column: 2;
  grid-row: 2;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--on-light-soft);
}

/* ---------- 覆盖与体验 ---------- */
.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-about .about-reach__stats {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .about-reach__stats .stat {
  border-top: 1px solid var(--line-cyan);
  padding-top: 12px;
}

.page-about .about-reach__stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1;
  color: var(--neon-cyan);
}

.page-about .about-reach__stats .stat__label {
  display: block;
  margin-top: 7px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--on-dark);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-week {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.page-about .about-week__day {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-light);
  padding: 10px 2px;
  text-align: center;
  font-size: 11px;
  line-height: 1.3;
  color: var(--mist);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .about-week__day--live {
  background: rgba(44, 232, 213, 0.16);
  border-color: var(--line-cyan);
  color: var(--table-green);
  font-weight: 700;
}

.page-about .about-week__day--live i {
  display: block;
  font-style: normal;
  font-size: 10px;
  margin-top: 3px;
  color: var(--chip-magenta);
}

.page-about .about-cadence__notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-note {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--chip-red);
}

.page-about .about-note:nth-child(2) { border-top-color: var(--neon-cyan); }
.page-about .about-note:nth-child(3) { border-top-color: var(--gold); }

.page-about .about-note h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--on-light-soft);
}

/* ---------- 联系 ---------- */
.page-about .about-contact__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-contact__note {
  position: relative;
  z-index: 1;
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--on-dark);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-library {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 860px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-shell__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 2px solid var(--line-light);
  }

  .page-about .about-rail__link {
    position: relative;
    border: 0;
    border-radius: 0;
    padding: 10px 0 10px 16px;
    white-space: normal;
    background: none;
    font-size: 14px;
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -2px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--chip-magenta);
    transform: translateY(-50%);
    transition: height 0.26s var(--ease);
  }

  .page-about .about-rail__link[data-active],
  .page-about .about-rail__link[aria-current] {
    background: none;
    color: var(--table-green);
  }

  .page-about .about-rail__link[data-active]::before,
  .page-about .about-rail__link[aria-current]::before {
    height: 100%;
  }

  .page-about .about-rail__link[data-active] .about-rail__tick,
  .page-about .about-rail__link[aria-current] .about-rail__tick {
    color: var(--chip-magenta);
  }

  .page-about .about-roles__item {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-service--wide .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
<<<END>>>