.page-about {
  --about-text: #22302c;
  --about-muted: #566862;
  --about-line: rgba(7, 18, 15, 0.13);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 30px) 0 clamp(40px, 6vw, 66px);
  color: var(--paper);
  background:
    radial-gradient(120% 92% at 84% 6%, rgba(56, 242, 210, 0.16) 0%, rgba(7, 18, 15, 0) 58%),
    linear-gradient(158deg, var(--ink) 0%, #0b231c 48%, var(--green) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: -6%;
  top: 4%;
  width: 64%;
  height: 94%;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 122, 47, 0.26), rgba(56, 242, 210, 0.1) 62%, rgba(7, 18, 15, 0));
  clip-path: polygon(22% 0%, 100% 0%, 78% 100%, 0% 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 122, 47, 0.55), rgba(56, 242, 210, 0.4), transparent);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(22px, 4vw, 36px);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(245, 242, 232, 0.58);
}

.page-about .about-hero .breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.page-about .about-hero .breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: rgba(245, 242, 232, 0.34);
}

.page-about .about-hero .breadcrumbs a {
  color: rgba(245, 242, 232, 0.82);
  text-decoration: none;
}

.page-about .about-hero .breadcrumbs a:hover,
.page-about .about-hero .breadcrumbs a:focus-visible {
  color: var(--cyan);
}

.page-about .about-hero .kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--ember);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  max-width: 14em;
  font-size: clamp(33px, 8vw, 68px);
  line-height: 1.03;
  font-weight: 900;
  letter-spacing: -0.025em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.72;
  color: rgba(245, 242, 232, 0.82);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 18px clamp(20px, 4vw, 42px);
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid rgba(245, 242, 232, 0.16);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 104px;
  padding-left: 14px;
  border-left: 2px solid rgba(56, 242, 210, 0.55);
}

.page-about .fact__num {
  font-family: var(--font-mono);
  font-size: clamp(19px, 3.4vw, 26px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .fact__label {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.1em;
  color: var(--steel);
}

/* ---------- 正文区 ---------- */
.page-about .about-deck {
  padding: clamp(36px, 6vw, 76px) 0 clamp(50px, 8vw, 96px);
  background: linear-gradient(180deg, rgba(232, 225, 210, 0.55) 0%, rgba(245, 242, 232, 0) 260px), var(--paper);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
}

.page-about .about-flow {
  min-width: 0;
  max-width: 100%;
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  display: none;
}

.page-about .about-toc .label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--green);
  opacity: 0.72;
}

.page-about .about-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.page-about .about-toc li {
  border-left: 2px solid var(--about-line);
  transition: border-color 0.16s var(--ease);
}

.page-about .about-toc li:hover {
  border-left-color: var(--orange);
}

.page-about .about-toc a {
  display: block;
  padding: 8px 4px 8px 13px;
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  color: var(--about-muted);
  transition: color 0.16s var(--ease);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--ink);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  position: relative;
  margin-bottom: clamp(34px, 5vw, 56px);
  padding-bottom: clamp(34px, 5vw, 56px);
  border-bottom: 1px solid var(--about-line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-sec:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.page-about .sec-index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--green);
  opacity: 0.72;
}

.page-about .about-sec > h2 {
  margin: 0 0 16px;
  font-size: clamp(23px, 3.6vw, 33px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-sec p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--about-text);
}

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

.page-about .about-sec a {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: rgba(255, 122, 47, 0.6);
  text-underline-offset: 3px;
}

.page-about .about-sec a:hover,
.page-about .about-sec a:focus-visible {
  color: var(--orange);
}

/* ---------- 深色卡片章节 ---------- */
.page-about .about-sec.about-card {
  padding: clamp(24px, 4.4vw, 44px);
  border-radius: var(--r-lg);
  border-bottom: none;
  color: var(--paper);
  background: linear-gradient(168deg, var(--green) 0%, var(--ink) 96%);
}

.page-about .about-card > h2 {
  color: var(--paper);
}

.page-about .about-card > .sec-index {
  color: var(--cyan);
  opacity: 0.85;
}

.page-about .about-card p {
  color: rgba(245, 242, 232, 0.8);
}

.page-about .about-card a {
  color: var(--cyan);
}

/* ---------- 起点分栏 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 30px);
  align-items: start;
}

.page-about .about-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--r-md);
  background: linear-gradient(150deg, var(--green), var(--ink));
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-figure figcaption {
  padding: 10px 14px 12px;
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: rgba(245, 242, 232, 0.72);
  background: var(--ink);
}

.page-about .about-figure--wide {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--cyan));
  opacity: 0.62;
}

.page-about .tl__item {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(22px, 3.4vw, 32px);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--orange);
}

.page-about .tl__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-size: clamp(16px, 2.4vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(245, 242, 232, 0.78);
}

/* ---------- 编辑流程 ---------- */
.page-about .steps {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .step {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 16px;
  border-radius: var(--r-md);
  border-left: 3px solid var(--orange);
  background: var(--cream);
}

.page-about .step__no {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .step__title {
  display: block;
  margin-bottom: 4px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--about-text);
}

.page-about .pullquote {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 20px clamp(18px, 3vw, 26px);
  border-left: 4px solid var(--paper);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--green);
  color: var(--paper);
  font-size: clamp(15px, 2.2vw, 17px);
  font-weight: 500;
  line-height: 1.62;
}

.page-about .pullquote p {
  margin: 0;
  color: inherit;
}

.page-about .pullquote span {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

/* ---------- 数据核对 ---------- */
.page-about .audit {
  list-style: none;
  margin: clamp(18px, 3vw, 24px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .audit li {
  position: relative;
  padding: 14px 16px 14px 44px;
  border-radius: var(--r-md);
  background: var(--cream);
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--about-text);
}

.page-about .audit li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .audit strong {
  color: var(--ink);
}

/* ---------- 团队分工 ---------- */
.page-about .crew {
  list-style: none;
  margin: clamp(20px, 3vw, 26px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .crew li {
  min-width: 0;
}

.page-about .crew__tag {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  max-width: 100%;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(245, 242, 232, 0.2);
  background: rgba(245, 242, 232, 0.07);
  font-size: 14px;
  line-height: 1.4;
  color: var(--paper);
  cursor: help;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .crew__tag:hover,
.page-about .crew__tag:focus-visible {
  outline: none;
  border-color: var(--cyan);
  background: rgba(56, 242, 210, 0.14);
}

.page-about .crew__tag:focus-visible {
  box-shadow: 0 0 0 3px rgba(56, 242, 210, 0.28);
}

.page-about .crew__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .crew__tip {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 6;
  width: min(230px, 68vw);
  padding: 10px 12px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(56, 242, 210, 0.35);
  background: var(--ink-2);
  font-size: 12px;
  line-height: 1.55;
  color: rgba(245, 242, 232, 0.86);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .crew__tag:hover .crew__tip,
.page-about .crew__tag:focus-visible .crew__tip {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 合作生态 ---------- */
.page-about .eco {
  list-style: none;
  margin: clamp(20px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .eco li {
  padding: 16px 18px 18px;
  border-radius: var(--r-md);
  border-top: 3px solid var(--orange);
  background: var(--cream);
}

.page-about .eco li:nth-child(2) {
  border-top-color: #1fa88f;
}

.page-about .eco li:nth-child(3) {
  border-top-color: #d19b1c;
}

.page-about .eco li:nth-child(4) {
  border-top-color: var(--violet);
}

.page-about .eco h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .eco p {
  margin: 0;
  font-size: 14px;
  line-height: 1.64;
  color: var(--about-text);
}

.page-about .honors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 24px);
}

.page-about .honors span {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px dashed rgba(14, 51, 41, 0.36);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--green);
}

/* ---------- 合作入口 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(110% 130% at 96% 0%, rgba(255, 122, 47, 0.26), rgba(7, 18, 15, 0) 60%),
    linear-gradient(160deg, var(--ink) 0%, var(--green) 100%);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .eco {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .split--reverse {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  }

  .page-about .split--reverse .split__media {
    order: -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 730px) 232px;
    justify-content: space-between;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-toc {
    display: block;
    grid-column: 2;
    grid-row: 1;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew__tag,
  .page-about .crew__tip,
  .page-about .about-toc li,
  .page-about .about-toc a {
    transition: none;
  }

  .page-about .crew__tip {
    transform: none;
  }
}
<<<END>>>