.page-about {
  --about-hair: rgba(110, 95, 60, 0.55);
  --about-body: rgba(247, 242, 232, 0.82);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
}

.page-about .about-section {
  padding: 3rem 0;
}

.page-about .section-head {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0 0 0.5rem;
}

.page-about .section-head__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .section-head__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.4vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 1.75rem 0 3rem;
  background:
    radial-gradient(115% 80% at 8% -10%, rgba(107, 18, 32, 0.92) 0%, rgba(64, 8, 15, 0) 58%),
    linear-gradient(180deg, var(--wine-deep) 0%, var(--ink) 84%);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.2vw, 2.7rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
  margin: 0.55rem 0 0.9rem;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 40em;
  font-size: clamp(0.98rem, 2.4vw, 1.06rem);
  line-height: 1.9;
  color: var(--about-body);
}

.page-about .about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.75rem 0 0;
  padding: 1px;
  border-radius: var(--radius-sm);
  background: var(--about-hair);
}

.page-about .about-facts li {
  background: rgba(13, 11, 12, 0.88);
  padding: 0.85rem 0.9rem;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--gold-bright);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--taupe);
}

.page-about .about-aside {
  padding: 1.35rem 1.3rem 1.45rem;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(64, 8, 15, 0.88), rgba(13, 11, 12, 0.94));
  box-shadow: var(--shadow-panel);
}

.page-about .about-aside__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-aside__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-aside__links li + li {
  border-top: 1px solid rgba(110, 95, 60, 0.4);
}

.page-about .about-aside__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 0;
  font-size: 0.94rem;
  color: var(--paper);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-about .about-aside__links a span {
  font-family: var(--font-mono);
  color: var(--gold-line);
  transition: color 160ms var(--ease);
}

.page-about .about-aside__links a:hover,
.page-about .about-aside__links a:focus-visible {
  color: var(--gold-bright);
}

.page-about .about-aside__links a:hover span,
.page-about .about-aside__links a:focus-visible span {
  color: var(--gold-bright);
}

.page-about .about-aside__note {
  margin: 1rem 0 0;
  padding-top: 0.95rem;
  border-top: 1px solid rgba(110, 95, 60, 0.4);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--taupe);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__media {
  margin: 1.75rem 0 0;
}

.page-about .tl {
  list-style: none;
  position: relative;
  margin: 2rem 0 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 8px;
  bottom: 2.5rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-line) 26%, rgba(110, 95, 60, 0.12) 100%);
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  column-gap: 0.9rem;
  padding-bottom: 1.5rem;
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: 24px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.12);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--gold-bright);
  padding-top: 0.1rem;
}

.page-about .tl__card {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.15rem 1.2rem;
  background: linear-gradient(160deg, rgba(64, 8, 15, 0.55), rgba(13, 11, 12, 0.76));
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .tl__card:hover,
.page-about .tl__card:focus-within {
  border-color: var(--gold-bright);
  transform: translateY(-2px);
}

.page-about .tl__title {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 0.5rem;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .tl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.9rem;
}

.page-about .tl__tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
  border: 1px solid rgba(110, 95, 60, 0.75);
  border-radius: 999px;
  padding: 0.18rem 0.6rem;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  background:
    radial-gradient(95% 65% at 100% 0%, rgba(107, 18, 32, 0.78) 0%, rgba(64, 8, 15, 0) 68%),
    linear-gradient(180deg, var(--wine-deep) 0%, var(--ink) 100%);
}

.page-about .about-lead {
  max-width: 56ch;
  margin: 0.85rem 0 0;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--about-body);
}

.page-about .about-team__media {
  margin: 1.9rem 0 0;
}

.page-about .team-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.page-about .team-card {
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.15rem 1.35rem;
  background: linear-gradient(160deg, rgba(13, 11, 12, 0.6), rgba(13, 11, 12, 0.88));
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.34);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--gold-bright);
  transform: translateY(-3px);
}

.page-about .team-card__bar {
  display: block;
  height: 4px;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.page-about .team-card--terms .team-card__bar {
  width: 58%;
  background: var(--gold);
}

.page-about .team-card--vendors .team-card__bar {
  width: 82%;
  background: var(--gold-line);
}

.page-about .team-card--layout .team-card__bar {
  width: 42%;
  background: var(--emerald);
}

.page-about .team-card__role {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--taupe);
}

.page-about .team-card h3 {
  font-family: var(--font-serif);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 0.6rem;
  color: var(--paper);
}

.page-about .team-card > p:not(.team-card__role) {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .team-card ul {
  list-style: none;
  margin: 0.95rem 0 0;
  padding: 0.9rem 0 0;
  border-top: 1px dashed rgba(110, 95, 60, 0.5);
  display: grid;
  gap: 0.42rem;
}

.page-about .team-card li {
  position: relative;
  padding-left: 0.95rem;
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(247, 242, 232, 0.75);
}

.page-about .team-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 资料来源 ---------- */
.page-about .sources-grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.5rem;
}

.page-about .about-sources p {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--about-body);
}

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

.page-about .sources-steps {
  list-style: none;
  counter-reset: src;
  margin: 1.25rem 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .sources-steps li {
  counter-increment: src;
  position: relative;
  padding-left: 2.4rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .sources-steps li::before {
  content: counter(src, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold);
  border: 1px solid rgba(110, 95, 60, 0.75);
  border-radius: 50%;
}

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

/* ---------- 做法 ---------- */
.page-about .about-practice {
  background: var(--paper);
  color: var(--ink);
  --about-body: rgba(13, 11, 12, 0.78);
}

.page-about .about-practice .section-head__num {
  color: var(--wine);
}

.page-about .about-practice .section-head__title {
  color: var(--ink);
}

.page-about .practice-list {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}

.page-about .practice-item {
  display: grid;
  grid-template-columns: 2.7rem minmax(0, 1fr);
  column-gap: 1rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(110, 95, 60, 0.45);
}

.page-about .practice-item__num {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--wine);
  align-self: start;
}

.page-about .practice-item h3 {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.page-about .practice-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.9;
  color: rgba(13, 11, 12, 0.78);
}

/* ---------- 收束带 ---------- */
.page-about .about-quote {
  padding: 2.4rem 0;
  border-top: 1px solid var(--about-hair);
  background: linear-gradient(100deg, var(--wine) 0%, var(--wine-deep) 58%, var(--ink) 100%);
}

.page-about .about-quote__inner {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.page-about .about-quote__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 8.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold-bright);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.6vw, 1.18rem);
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-quote__source {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--taupe);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-section {
    padding: 3.6rem 0;
  }
}

@media (min-width: 820px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-about .practice-item {
    grid-template-columns: 3.4rem minmax(0, 1fr);
    column-gap: 1.6rem;
  }

  .page-about .practice-item__num {
    font-size: 2.9rem;
  }
}

@media (min-width: 880px) {
  .page-about .sources-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 3rem;
    align-items: start;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 2rem 0 4rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4.5fr);
    column-gap: 3rem;
    align-items: start;
    margin-top: 2rem;
  }

  .page-about .about-aside {
    margin-top: 3.4rem;
  }

  .page-about .about-section {
    padding: 4.25rem 0;
  }

  .page-about .tl {
    margin-top: 2.4rem;
  }

  .page-about .tl::before {
    left: 132px;
  }

  .page-about .tl__item {
    grid-template-columns: 120px minmax(0, 1fr);
    column-gap: 2rem;
    padding-bottom: 1.9rem;
  }

  .page-about .tl__item::after {
    left: 126px;
    top: 9px;
  }

  .page-about .tl__year {
    position: sticky;
    top: 88px;
    align-self: start;
    font-size: 1rem;
  }

  .page-about .tl__card {
    padding: 1.35rem 1.5rem 1.45rem;
  }

  .page-about .about-quote {
    padding: 3rem 0;
  }

  .page-about .about-quote__inner {
    gap: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card,
  .page-about .team-card,
  .page-about .about-aside__links a {
    transition: none;
  }

  .page-about .tl__card:hover,
  .page-about .tl__card:focus-within,
  .page-about .team-card:hover,
  .page-about .team-card:focus-within {
    transform: none;
  }
}
<<<END>>>