.page-about {
  --about-glow: rgba(56, 242, 200, 0.08);
  --about-amber: rgba(255, 162, 58, 0.08);
  background: var(--night);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 20px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .crumbs__item {
  color: var(--muted);
  text-decoration: none;
}

.page-about .crumbs__item[href]:hover {
  color: var(--cyan);
}

.page-about .crumbs__item[aria-current="page"] {
  color: var(--cyan);
}

.page-about .crumbs__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(34, 52, 79, 0.28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 52, 79, 0.28) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 90% at 85% 0%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 90% at 85% 0%, #000 0%, transparent 68%);
  pointer-events: none;
}

.page-about .hero-stage {
  position: relative;
  display: grid;
  gap: 28px;
  padding: clamp(28px, 6vw, 72px) 0 clamp(32px, 5vw, 64px);
}

.page-about .hero-stage__big {
  display: flex;
  align-items: flex-end;
  gap: clamp(10px, 2vw, 22px);
  flex-wrap: wrap;
}

.page-about .hero-stage__word {
  display: block;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(96px, 17vw, 196px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--text);
  background: linear-gradient(160deg, var(--text) 32%, var(--teal) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .hero-stage__num {
  font-size: clamp(18px, 2.4vw, 30px);
  color: var(--cyan);
  line-height: 1;
  padding: 0 0 6px 12px;
  border-left: 2px solid var(--amber);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .hero-stage__copy h1 {
  margin: 12px 0 18px;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--text);
  max-width: 20ch;
}

.page-about .hero-stage__copy .lede {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  max-width: 58ch;
}

.page-about .hero-visual {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1200 / 640;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.04);
}

.page-about .hero-visual figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-shell {
  padding-top: clamp(40px, 7vw, 88px);
}

.page-about .about-shell__grid {
  display: grid;
  gap: 32px;
}

/* ---------- 侧边索引 ---------- */
.page-about .rail {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .rail__head {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

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

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

.page-about .rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 4px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}

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

.page-about .rail__no {
  font-size: 11px;
  color: var(--teal);
}

.page-about .rail__link:hover .rail__no {
  color: var(--cyan);
}

.page-about .rail__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-about .rail__meta-num {
  font-size: 34px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .rail__meta-label {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .flow {
  display: block;
  min-width: 0;
}

.page-about .flow-block {
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .flow-block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .flow-block__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  padding-right: 12px;
  border-right: 1px solid var(--line);
}

.page-about .flow-block__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .flow-block__intro {
  margin: 0 0 26px;
  max-width: 60ch;
  color: var(--muted);
  line-height: 1.82;
  font-size: 15px;
}

.page-about .flow-block__body p {
  margin: 0 0 18px;
  max-width: 62ch;
  line-height: 1.86;
  color: var(--text);
}

.page-about .origin-quote {
  margin: 30px 0 4px;
  padding-left: 20px;
  border-left: 2px solid var(--cyan);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.6;
  color: var(--text);
  max-width: 30ch;
}

/* ---------- 时间轴 ---------- */
.page-about .tl-figure {
  margin: 0 0 28px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 900 / 600;
  object-fit: cover;
  opacity: 0.86;
  filter: saturate(0.9);
}

.page-about .tl {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(178px, 1fr);
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-about .tl__item {
  position: relative;
  min-height: 210px;
  padding: 26px 16px 18px;
  border-left: 1px solid var(--line);
  transition: background var(--t);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: -5px;
  width: 9px;
  height: 9px;
  background: var(--amber);
  transition: background var(--t);
}

.page-about .tl__item:hover {
  background: rgba(17, 30, 48, 0.72);
}

.page-about .tl__item:hover::before {
  background: var(--cyan);
}

.page-about .tl__item--now {
  background: linear-gradient(180deg, rgba(56, 242, 200, 0.07), transparent 70%);
}

.page-about .tl__item--now::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 242, 200, 0.14);
  animation: about-pulse 2.8s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(56, 242, 200, 0.14); }
  50% { box-shadow: 0 0 0 9px rgba(56, 242, 200, 0.03); }
}

.page-about .tl__season {
  display: block;
  font-size: 12px;
  letter-spacing: 0.13em;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-about .tl__item--now .tl__season {
  color: var(--cyan);
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--text);
}

.page-about .tl__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .tl__more {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-about .tl__more p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-stat {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0 0 30px;
  border: 1px solid var(--line);
  background: var(--console);
}

.page-about .team-stat .stat {
  padding: 20px 16px;
  border-right: 1px solid var(--line);
}

.page-about .team-stat .stat:last-child {
  border-right: 0;
}

.page-about .team-stat .stat__num {
  display: block;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .team-stat .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .team-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .team-role {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 16px;
  align-items: start;
  transition: padding-left var(--t);
}

.page-about .team-role:hover {
  padding-left: 10px;
}

.page-about .team-role__num {
  grid-area: num;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .team-role__name {
  grid-area: name;
  margin: 0 0 6px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}

.page-about .team-role__desc {
  grid-area: desc;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 本地化 ---------- */
.page-about .local-split {
  display: grid;
  gap: 26px;
}

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

.page-about .local-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 900 / 600;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.94);
}

.page-about .local-lead {
  margin: 0 0 22px;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.78;
  color: var(--text);
  max-width: 52ch;
}

.page-about .local-points {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .local-points li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .local-points__key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .local-points__val {
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 荣誉与合作 ---------- */
.page-about .honor-wall {
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .honor {
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  filter: grayscale(1);
  transition: filter var(--t), background var(--t);
}

.page-about .honor:hover,
.page-about .honor:focus-within {
  filter: grayscale(0);
  background: var(--about-glow);
}

.page-about .honor__tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .honor__title {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.45;
  color: var(--text);
}

.page-about .honor__meta {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-cta {
  margin-top: 34px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--about-amber);
  display: grid;
  gap: 18px;
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text);
  max-width: 54ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .hero-stage {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: end;
    gap: clamp(24px, 4vw, 64px);
  }

  .page-about .local-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(22px, 3vw, 42px);
  }

  .page-about .honor-wall {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-shell__grid {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .rail {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
    align-self: start;
  }

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

  .page-about .rail__link {
    display: flex;
    justify-content: flex-start;
    width: 100%;
    padding: 9px 0;
    border-bottom: 1px solid var(--line);
  }

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

  .page-about .flow-block__head {
    gap: 18px;
  }
}

@media (min-width: 1080px) {
  .page-about .tl {
    grid-auto-flow: initial;
    grid-template-columns: repeat(8, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-about .tl__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.32s ease, opacity 0.32s ease, margin-top 0.32s ease;
    margin-top: 0;
  }

  .page-about .tl__item:hover .tl__more,
  .page-about .tl__item:focus-within .tl__more {
    max-height: 190px;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item--now::before {
    animation: none;
  }

  .page-about .tl__more,
  .page-about .team-role,
  .page-about .honor,
  .page-about .rail__link,
  .page-about .tl__item {
    transition: none;
  }
}
<<<END>>>