.page-about {
  --about-rail-w: 88px;
  --about-cut: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  --about-glow: rgba(201, 162, 39, 0.16);
  background: var(--ink);
  color: var(--ivory);
}

.page-about [id] {
  scroll-margin-top: 120px;
}

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 8px;
}

.page-about .about-flow {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ---------- 左侧索引栏 ---------- */
.page-about .about-rail {
  display: none;
}

.page-about .about-rail__stamp {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin: 0 0 24px 4px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-rail__list a {
  display: block;
  text-decoration: none;
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.page-about .about-rail__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-rail__label {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--cool);
  line-height: 1.4;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-left-color: var(--gold);
  outline: none;
}

.page-about .about-rail__list a:hover .about-rail__label,
.page-about .about-rail__list a:focus-visible .about-rail__label {
  color: var(--ivory);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 34px;
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__media img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 11, 13, 0.5) 0%, rgba(11, 11, 13, 0.86) 62%, var(--ink) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-inline: 2px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  color: var(--ivory);
}

.page-about .about-hero__lead {
  margin: 0 0 14px;
  max-width: 37em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--ivory-78);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-stats > div {
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  background: rgba(20, 22, 26, 0.76);
  clip-path: var(--about-cut);
}

.page-about .about-stats dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cool);
}

.page-about .about-stats dd {
  margin: 7px 0 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gold-hi);
}

/* ---------- 章节容器 ---------- */
.page-about .about-chapter {
  position: relative;
  margin-top: 24px;
  padding: clamp(20px, 4.4vw, 40px);
  border: 1px solid var(--line-soft);
  background: var(--panel);
  clip-path: var(--about-cut);
}

.page-about .about-chapter--teal {
  background: linear-gradient(158deg, rgba(30, 59, 54, 0.88) 0%, var(--panel) 62%);
}

.page-about .about-chapter--wine {
  background: linear-gradient(158deg, rgba(58, 27, 39, 0.88) 0%, var(--panel) 62%);
}

.page-about .about-chapter--indigo {
  background: linear-gradient(158deg, rgba(36, 28, 58, 0.9) 0%, var(--panel) 62%);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  margin: 12px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.page-about .about-intro {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ivory-78);
}

.page-about .about-motif {
  display: block;
  width: 120px;
  height: 24px;
  margin: 0 0 14px;
  color: var(--gold);
  opacity: 0.8;
}

/* ---------- 沿革 ---------- */
.page-about .about-wide-media {
  margin: 0 0 24px;
}

.page-about .about-ratio-wide {
  aspect-ratio: 12 / 5;
}

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

.page-about .about-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 80%;
  gap: 14px;
  overflow-x: auto;
  padding: 10px 2px 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-node {
  position: relative;
  scroll-snap-align: start;
  padding: 36px 18px 18px;
  border: 1px solid var(--line-soft);
  background: var(--panel-lift);
  clip-path: var(--about-cut);
  transition: transform 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-line-strong), rgba(201, 162, 39, 0.05));
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  top: 9px;
  left: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--about-glow);
}

.page-about .about-node:hover {
  transform: translateY(-2px);
  border-color: var(--gold-line-strong);
}

.page-about .about-node__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold-hi);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ivory);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ivory-62);
}

.page-about .about-node__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gold-hi);
  transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
}

.page-about .about-node:hover .about-node__more {
  max-height: 160px;
  margin-top: 10px;
  opacity: 1;
}

/* ---------- 团队 ---------- */
.page-about .about-crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-crew {
  position: relative;
  overflow: hidden;
  padding: 26px 18px 20px;
  border: 1px solid var(--line-soft);
  background: var(--panel-lift);
  clip-path: var(--about-cut);
  transition: transform 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .about-crew::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-line-strong), rgba(201, 162, 39, 0));
}

.page-about .about-crew::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-hi), rgba(232, 199, 102, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s var(--ease);
}

.page-about .about-crew:hover {
  transform: translateY(-2px);
  border-color: var(--gold-line-strong);
}

.page-about .about-crew:hover::after {
  transform: scaleX(1);
}

.page-about .about-crew__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-crew__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--ivory);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ivory-62);
}

.page-about .about-note {
  margin: 20px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--gold);
  background: rgba(201, 162, 39, 0.07);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ivory-78);
}

/* ---------- 流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-step {
  position: relative;
  padding: 18px 30px 18px 16px;
  border: 1px solid var(--line-strong);
  background: rgba(11, 11, 13, 0.42);
  clip-path: var(--about-cut);
}

.page-about .about-step::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 14px;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
  transform: rotate(45deg);
  opacity: 0.75;
}

.page-about .about-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--gold-hi);
}

.page-about .about-step__title {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--ivory);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ivory-62);
}

/* ---------- 视觉与术语 ---------- */
.page-about .about-visual {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-body-text {
  margin: 0 0 14px;
  max-width: 37em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ivory-78);
}

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

.page-about .about-caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.72;
  letter-spacing: 0.02em;
  color: var(--cool);
}

.page-about .about-mini {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-mini__item {
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  background: rgba(11, 11, 13, 0.42);
}

.page-about .about-mini__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--gold-hi);
}

.page-about .about-mini__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cool);
}

/* ---------- 服务与联络 ---------- */
.page-about .about-contact-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-scope {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-scope li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ivory-78);
}

.page-about .about-scope li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-scope strong {
  color: var(--ivory);
  font-weight: 600;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 20px;
}

.page-about .about-contact-card {
  padding: clamp(18px, 3.4vw, 26px);
  border: 1px solid var(--gold-line);
  background: linear-gradient(158deg, rgba(36, 28, 58, 0.92) 0%, var(--panel) 72%);
  clip-path: var(--about-cut);
  display: grid;
  gap: 16px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 3px;
}

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cool);
}

.page-about .about-contact__val {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ivory);
  word-break: break-word;
}

.page-about .about-contact-card .about-caption {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-track {
    grid-auto-columns: 300px;
  }
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-steps > .about-step:last-child::after {
    display: none;
  }

  .page-about .about-visual {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-contact-wrap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: 40px;
  }

  .page-about .about-rail {
    display: block;
    align-self: start;
    position: sticky;
    top: calc(var(--header-top) + var(--header-h) + 28px);
  }

  .page-about .about-hero {
    padding-top: 14px;
  }

  .page-about .about-hero__inner {
    padding-inline: 8px 12px;
  }

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

  .page-about .about-track {
    grid-auto-columns: 272px;
  }
}

@media (hover: none) {
  .page-about .about-node__more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-crew,
  .page-about .about-node__more,
  .page-about .about-crew::after,
  .page-about .about-rail__list a {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-crew:hover {
    transform: none;
  }
}
<<<END>>>