.page-about {
  --about-sticky: 128px;
  --about-line: 1px solid var(--line-gold);
  --about-soft: 1px solid var(--line-soft);
  background: var(--shell-bg);
  color: var(--txt);
  overflow-x: clip;
}

.page-about [id] {
  scroll-margin-top: 100px;
}

/* ---------- 首屏：半幅开窗 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background:
    radial-gradient(130% 95% at 8% 0%, rgba(180, 35, 43, 0.36), transparent 62%),
    radial-gradient(90% 80% at 100% 100%, rgba(59, 42, 85, 0.42), transparent 70%),
    var(--shell-bg);
  border-bottom: var(--about-line);
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-self: center;
  padding-block: clamp(2rem, 7vw, 4rem);
}

.page-about .about-hero__copy .breadcrumbs {
  font-family: var(--font-index);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--txt-dim);
}

.page-about .about-hero__copy .breadcrumbs a {
  color: var(--txt-dim);
  text-decoration: none;
}

.page-about .about-hero__copy .breadcrumbs a:hover,
.page-about .about-hero__copy .breadcrumbs a:focus-visible {
  color: var(--gold-light);
}

.page-about h1 {
  margin: 0.2rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--txt-strong);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.78;
  color: var(--txt);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.75rem;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 2.25rem;
  margin: 1.25rem 0 0;
  padding-top: 1.15rem;
  border-top: var(--about-soft);
}

.page-about .about-hero__facts div {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.15rem;
  min-width: 5.5rem;
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-family: var(--font-index);
  font-size: 1.3rem;
  color: var(--gold-light);
}

.page-about .about-hero__facts dt {
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--txt-dim);
}

.page-about .about-hero__art {
  position: relative;
  margin: 0;
  min-height: 230px;
  border-top: var(--about-line);
  background: linear-gradient(155deg, rgba(180, 35, 43, 0.5), rgba(14, 21, 18, 0.94));
  overflow: hidden;
}

.page-about .about-hero__art img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
  opacity: 0.92;
  mix-blend-mode: luminosity;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding-block: var(--pad-block);
  border-top: var(--about-soft);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num eyebrow"
    "num title";
  column-gap: 0.9rem;
  align-items: start;
  margin-bottom: 1.75rem;
}

.page-about .about-head .index-num {
  grid-area: num;
  font-family: var(--font-index);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1;
  color: var(--gold);
  opacity: 0.75;
  letter-spacing: -0.03em;
}

.page-about .about-head .eyebrow {
  grid-area: eyebrow;
  font-family: var(--font-index);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--gold-light);
  margin: 0 0 0.35rem;
}

.page-about .section-title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.7vw, 2.1rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--txt-strong);
}

.page-about .prose {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--txt);
}

.page-about .about-intro {
  max-width: 62ch;
  margin: 0 0 1.75rem;
}

.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

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

.page-about .about-cols__text p {
  margin: 0;
}

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-list li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--txt);
}

.page-about .about-list li strong {
  display: block;
  margin-bottom: 0.2rem;
  font-weight: 600;
  color: var(--gold-light);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 8px;
  height: 8px;
  background: var(--red);
  box-shadow: 0 0 0 1px var(--gold-light);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background-image: radial-gradient(circle at 12% 18%, rgba(217, 164, 65, 0.1) 0 22px, transparent 23px),
    radial-gradient(circle at 12% 18%, rgba(217, 164, 65, 0.07) 0 40px, transparent 41px);
  background-repeat: no-repeat;
}

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

.page-about .rail {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.page-about .rail a {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.6rem 0.5rem 0.6rem 0.9rem;
  border-left: 2px solid var(--line-gold);
  text-decoration: none;
  color: var(--txt);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .rail a:hover,
.page-about .rail a:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(52, 211, 192, 0.08);
  color: var(--txt-strong);
}

.page-about .rail__year {
  font-family: var(--font-index);
  font-size: 0.98rem;
  color: var(--gold-light);
}

.page-about .rail__label {
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-about .rail__note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: var(--about-soft);
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--txt-dim);
}

.page-about .about-timeline__panels {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about .batch-index {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.35rem;
  margin: 0 0 0.5rem;
  padding: 0;
}

.page-about .batch-index li {
  font-family: var(--font-index);
  font-size: 0.78rem;
  text-align: center;
  padding: 0.5rem 0.2rem;
  border: 1px solid rgba(217, 164, 65, 0.4);
  color: var(--gold-light);
  background: rgba(217, 164, 65, 0.06);
}

.page-about .about-batch {
  padding: 1.35rem 1.25rem;
  border-left: 3px solid var(--red);
  display: grid;
  gap: 0.5rem;
  align-content: start;
}

.page-about .about-batch__year {
  margin: 0;
  font-family: var(--font-index);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-batch h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--txt-strong);
}

.page-about .about-batch p:last-child {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .about-figure {
  margin: 1.25rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--about-line);
  background: linear-gradient(160deg, rgba(18, 59, 50, 0.6), rgba(14, 21, 18, 0.9));
}

.page-about .about-figure .media__note {
  margin-top: 0.6rem;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--txt-dim);
}

/* ---------- 内容体系 ---------- */
.page-about .answer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: var(--about-soft);
}

.page-about .answer-card {
  background:
    linear-gradient(180deg, rgba(18, 59, 50, 0.55), rgba(14, 21, 18, 0.92));
  padding: 1.35rem 1.25rem;
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.page-about .answer-card__num {
  font-family: var(--font-index);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .answer-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--txt-strong);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(217, 164, 65, 0.32);
}

.page-about .answer-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--txt);
}

.page-about .about-link-line {
  margin: 1.5rem 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--txt-dim);
}

.page-about .about-link-line a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link-line a:hover,
.page-about .about-link-line a:focus-visible {
  color: var(--gold-light);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: center;
}

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

.page-about .team-layout__text p {
  margin: 0;
}

.page-about .team-bars {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr) 3rem;
  gap: 0.7rem;
  align-items: center;
  font-size: 0.86rem;
  color: var(--txt);
}

.page-about .team-bar__track {
  display: block;
  height: 10px;
  background: rgba(246, 239, 226, 0.1);
  border: var(--about-soft);
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
}

.page-about .team-bar__fill--edit {
  width: 61%;
  background: linear-gradient(90deg, var(--red), var(--gold));
}

.page-about .team-bar__fill--design {
  width: 22%;
  background: linear-gradient(90deg, var(--green), var(--cyan));
}

.page-about .team-bar__fill--fe {
  width: 17%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
}

.page-about .team-bar__value {
  font-family: var(--font-index);
  font-size: 0.82rem;
  text-align: right;
  color: var(--gold-light);
}

.page-about .about-figure--team {
  margin: 0;
}

/* ---------- 读者分布 ---------- */
.page-about .reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .reach div {
  border-top: 2px solid var(--gold);
  padding-top: 0.8rem;
  display: grid;
  gap: 0.2rem;
}

.page-about .reach strong {
  font-family: var(--font-index);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--txt-strong);
}

.page-about .reach span {
  font-size: 0.84rem;
  color: var(--txt-dim);
}

.page-about .about-reach-note {
  margin: 1.5rem 0 0;
  max-width: 66ch;
}

.page-about .about-reach-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 品牌手册标签页 ---------- */
.page-about .about-manual-section {
  background:
    linear-gradient(180deg, rgba(18, 59, 50, 0.42), rgba(14, 21, 18, 0.96));
}

.page-about .manual {
  margin-top: 1.75rem;
  border: var(--about-line);
  background: rgba(14, 21, 18, 0.6);
}

.page-about .manual__tabs {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  padding: 0.5rem;
  border-bottom: var(--about-line);
  scrollbar-width: thin;
}

.page-about .manual__tab {
  flex: 0 0 auto;
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--txt-dim);
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-about .manual__tab:hover {
  color: var(--txt-strong);
  background: rgba(217, 164, 65, 0.12);
}

.page-about .manual__tab[aria-selected="true"] {
  color: var(--ink);
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  border-color: var(--gold-light);
}

.page-about .manual__panel {
  padding: 1.35rem 1.25rem 1.5rem;
  display: grid;
  gap: 0.6rem;
  align-content: start;
}

.page-about .manual__panel[hidden] {
  display: none;
}

.page-about .manual__panel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--txt-strong);
}

.page-about .manual__panel p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--txt);
  max-width: 64ch;
}

.page-about .swatches {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .swatch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.6rem;
  border: var(--about-soft);
  font-family: var(--font-index);
  font-size: 0.74rem;
  color: var(--txt);
}

.page-about .swatch::before {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  background: var(--sw, var(--gold));
  border: 1px solid rgba(246, 239, 226, 0.35);
}

.page-about .swatch--red { --sw: var(--red); }
.page-about .swatch--gold { --sw: var(--gold); }
.page-about .swatch--green { --sw: var(--green); }
.page-about .swatch--cream { --sw: var(--cream); }
.page-about .swatch--cyan { --sw: var(--cyan); }

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-block: var(--pad-block);
  border-top: var(--about-line);
  background:
    linear-gradient(180deg, rgba(122, 18, 26, 0.5), rgba(14, 21, 18, 0.98));
}

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

.page-about .next-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(217, 164, 65, 0.45);
}

.page-about .next-list a {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.35rem 1rem;
  padding: 1rem 0.25rem;
  border-bottom: var(--about-soft);
  text-decoration: none;
  color: var(--txt-strong);
  transition: color 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-about .next-list a span:first-child {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .next-list a span:last-child {
  font-size: 0.84rem;
  color: var(--txt-dim);
}

.page-about .next-list a:hover,
.page-about .next-list a:focus-visible {
  color: var(--gold-light);
  padding-left: 0.65rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .batch-index {
    grid-template-columns: repeat(9, minmax(0, 1fr));
  }

  .page-about .reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

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

  .page-about .about-timeline__panels {
    gap: 1.15rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
    align-items: stretch;
  }

  .page-about .about-hero__copy {
    padding-block: clamp(3rem, 7vw, 5.5rem);
  }

  .page-about .about-hero__art {
    border-top: 0;
    border-left: var(--about-line);
    min-height: 100%;
    clip-path: polygon(7% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-about .about-hero__art img {
    min-height: 520px;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.95fr);
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    gap: 2.75rem;
  }

  .page-about .manual__panel {
    padding: 1.75rem 2rem 2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 270px) minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: var(--about-sticky);
    align-self: start;
  }

  .page-about .about-batch {
    padding: 1.6rem 1.75rem;
  }
}

@media (min-width: 1180px) {
  .page-about .answer-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>