.page-about {
  --about-line-dark: rgba(201, 162, 75, .26);
  --about-cut: 22px;
  background: var(--paper);
  color: var(--brown);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-about .about-crumb .breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: var(--fs-12);
  letter-spacing: .04em;
}
.page-about .about-crumb .breadcrumb-item {
  color: var(--ash);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-about .about-crumb .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--fog);
}
.page-about .about-crumb .breadcrumb-link {
  color: var(--ash);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.page-about .about-crumb a.breadcrumb-link:hover,
.page-about .about-crumb a.breadcrumb-link:focus-visible {
  color: var(--gold-bright);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    linear-gradient(112deg, rgba(201, 162, 75, .13) 0%, rgba(201, 162, 75, 0) 48%),
    var(--ink);
  color: var(--paper);
  padding-top: clamp(20px, 3vw, 30px);
  padding-bottom: clamp(78px, 12vw, 140px);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(26px, 6vw, 60px);
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  min-width: 0;
}
.page-about .about-hero-media {
  order: 2;
  margin: 0;
  position: relative;
  min-width: 0;
}
.page-about .about-hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--about-line-dark);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}
.page-about .about-media-caption {
  margin: 12px 0 0;
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--ash);
}
.page-about .about-hero-copy {
  order: 1;
  min-width: 0;
}

.page-about .eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--gold);
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.18;
  letter-spacing: .02em;
  color: var(--paper);
}
.page-about .about-lead {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 46ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: #D9CFBC;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(30px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-dark);
}
.page-about .about-stat {
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line-dark);
  min-width: 0;
}
.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -.01em;
}
.page-about .about-stat-unit {
  margin-left: 5px;
  font-size: var(--fs-14);
  color: var(--gold-bright);
}
.page-about .about-stat-label {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--ash);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(44px, 7vw, 84px) clamp(64px, 10vw, 120px);
  min-width: 0;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  min-width: 0;
}
.page-about .about-index-title {
  margin: 0 0 12px;
  color: var(--fog);
}
.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index-list::-webkit-scrollbar {
  display: none;
}
.page-about .about-index-item a {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--paper-text-soft);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.4;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .about-index-item a:hover,
.page-about .about-index-item a:focus-visible {
  color: var(--brown);
  border-color: var(--fog);
  background: var(--paper-2);
}

/* ---------- 内容流 ---------- */
.page-about .about-flow {
  min-width: 0;
}
.page-about .about-sec {
  scroll-margin-top: 96px;
  margin-bottom: clamp(64px, 10vw, 112px);
}
.page-about .about-sec:last-child {
  margin-bottom: 0;
}
.page-about .about-sec-head {
  max-width: 60ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.page-about .about-sec-head .eyebrow {
  color: var(--vermilion);
}
.page-about .about-sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 36px);
  line-height: 1.3;
  letter-spacing: .015em;
  color: var(--brown);
}
.page-about .about-sec-lead {
  margin: 18px 0 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--paper-text-soft);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 26px;
  width: 1px;
  background: var(--line-strong);
}
.page-about .tl-item {
  position: relative;
  padding-left: 38px;
  padding-bottom: clamp(48px, 8vw, 96px);
}
.page-about .tl-item:last-child {
  padding-bottom: 0;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--fog);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .tl-item:hover::before {
  border-color: var(--gold);
  background: var(--gold-bright);
}
.page-about .tl-ver {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 66px);
  font-weight: 500;
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--fog);
  transition: color var(--dur) var(--ease);
}
.page-about .tl-item:hover .tl-ver {
  color: var(--gold);
}
.page-about .tl-body {
  margin-top: 14px;
  max-width: 54ch;
}
.page-about .tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.page-about .tl-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.4;
  color: var(--brown);
}
.page-about .tl-tag {
  display: inline-block;
  padding: 2px 9px;
  border: 1px solid rgba(46, 107, 93, .45);
  color: var(--jade);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.6;
  letter-spacing: .04em;
}
.page-about .tl-body p {
  margin: 12px 0 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--paper-text-soft);
}

/* ---------- 版本差异筛选 ---------- */
.page-about .diff {
  margin-top: clamp(36px, 5vw, 56px);
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(24px, 3vw, 34px);
}
.page-about .diff-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}
.page-about .diff-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--brown);
}
.page-about .diff-count {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--fog);
}
.page-about .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}
.page-about .chip {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  cursor: pointer;
}
.page-about .diff-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}
.page-about .diff-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .diff-name {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--brown);
}
.page-about .diff-vers {
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--jade);
}

/* ---------- 图片位 ---------- */
.page-about .about-fig {
  position: relative;
  margin: 0 0 clamp(28px, 4vw, 40px);
  overflow: hidden;
}
.page-about .about-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-fig::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: var(--cut-lg);
  height: var(--cut-lg);
  background: var(--paper);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.page-about .about-fig--wide {
  margin-top: clamp(32px, 4vw, 44px);
}

/* ---------- 六类栏目 ---------- */
.page-about .cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .cat-item {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.page-about .cat-item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .cat-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.9;
  letter-spacing: .05em;
  color: var(--fog);
}
.page-about .cat-item h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--brown);
}
.page-about .cat-item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--paper-text-soft);
}

/* ---------- 审校块 ---------- */
.page-about .review {
  margin-top: clamp(32px, 5vw, 48px);
  padding: clamp(24px, 4vw, 42px);
  background: var(--ink-2);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}
.page-about .review h3 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.6vw, 22px);
  color: var(--gold-bright);
}
.page-about .review-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .review-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  padding: 14px 0;
  border-top: 1px solid var(--about-line-dark);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ash);
}
.page-about .review-steps li:last-of-type {
  border-bottom: 1px solid var(--about-line-dark);
}
.page-about .review-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--gold);
}
.page-about .review-steps strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--paper);
}
.page-about .review-note {
  margin: 20px 0 0;
  font-size: var(--fs-12);
  line-height: 1.8;
  color: var(--ash);
  letter-spacing: .02em;
}

/* ---------- 团队 ---------- */
.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.page-about .team-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 40px);
  line-height: 1;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--jade);
}
.page-about .team-item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--brown);
}
.page-about .team-item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-text-soft);
}
.page-about .team-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-text-soft);
}

/* ---------- 协作 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .partner-item {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.page-about .partner-item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .partner-num {
  display: inline-block;
  min-width: 56px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 32px);
  line-height: 1.1;
  font-weight: 600;
  color: var(--vermilion);
  letter-spacing: -.01em;
}
.page-about .partner-item h3 {
  display: inline-block;
  margin: 0 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--brown);
  vertical-align: baseline;
}
.page-about .partner-item p {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-text-soft);
}

/* ---------- 场景 ---------- */
.page-about .about-daily {
  padding-top: clamp(24px, 4vw, 40px);
}
.page-about .scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.page-about .scene-item {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
}
.page-about .scene-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  color: var(--brown);
  transition: color var(--dur) var(--ease);
}
.page-about .scene-link:hover,
.page-about .scene-link:focus-visible {
  color: var(--vermilion);
}
.page-about .scene-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  line-height: 1.5;
}
.page-about .scene-go {
  flex: none;
  font-size: var(--fs-16);
  color: var(--gold);
  transition: transform var(--dur) var(--ease);
}
.page-about .scene-link:hover .scene-go,
.page-about .scene-link:focus-visible .scene-go {
  transform: translateX(4px);
}
.page-about .scene-item p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-text-soft);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-stat {
    padding: 20px 16px 20px 0;
    border-bottom: 0;
    border-right: 1px solid var(--about-line-dark);
  }
  .page-about .about-stat + .about-stat {
    padding-left: 16px;
  }
  .page-about .about-stat:last-child {
    border-right: 0;
    padding-right: 0;
  }
  .page-about .cat-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 40px);
  }
  .page-about .cat-item:nth-child(1) {
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 760px) {
  .page-about .team-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 32px);
  }
  .page-about .team-item {
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 24px 20px 24px 0;
  }
  .page-about .team-item:last-child {
    border-right: 0;
    padding-right: 0;
  }
  .page-about .about-daily .scene-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 44px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 5fr 6fr;
    align-items: end;
  }
  .page-about .about-hero-media {
    order: 1;
  }
  .page-about .about-hero-copy {
    order: 2;
    padding-bottom: 8px;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(48px, 7vw, 96px);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-about .about-index-title {
    margin-bottom: 16px;
  }
  .page-about .about-index-list {
    display: block;
    overflow: visible;
  }
  .page-about .about-index-item a {
    display: block;
    padding: 11px 0 11px 16px;
    border: 0;
    border-left: 1px solid var(--line);
    background: transparent;
    white-space: normal;
  }
  .page-about .about-index-item a:hover,
  .page-about .about-index-item a:focus-visible {
    border-left-color: var(--gold);
    color: var(--brown);
    background: transparent;
  }
  .page-about .tl-item {
    padding-left: 52px;
  }
  .page-about .tl::before {
    left: 7px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-body {
    grid-template-columns: 220px minmax(0, 1fr);
  }
  .page-about .about-plain-guard {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index-item a,
  .page-about .tl-ver,
  .page-about .tl-item::before,
  .page-about .scene-link,
  .page-about .scene-go,
  .page-about .about-crumb .breadcrumb-link {
    transition: none;
  }
  .page-about .scene-link:hover .scene-go,
  .page-about .scene-link:focus-visible .scene-go {
    transform: none;
  }
}
<<<END>>>