.page-about {
  background: var(--c-deep);
  color: var(--c-paper);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* 面包屑 */
.page-about .crumbs {
  padding-top: clamp(20px, 3.5vw, 40px);
}
.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(22px, 4vw, 44px);
  padding: 0;
  list-style: none;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-stone);
}
.page-about .crumbs__item {
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .crumbs__item a {
  color: var(--c-stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .crumbs__item a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}
.page-about .crumbs__item [aria-current="page"] {
  color: var(--c-cyan);
}
.page-about .crumbs__sep {
  width: 18px;
  height: 1px;
  background: var(--c-line);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--c-line);
}
.page-about .about-hero__text {
  min-width: 0;
}
.page-about .about-hero h1 {
  margin: 12px 0 18px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.05;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.page-about .about-hero__lede {
  max-width: 54ch;
  margin: 0 0 clamp(24px, 3.5vw, 36px);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-stone);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.page-about .about-hero__stats li {
  background: var(--c-panel);
  padding: 14px 16px 16px;
}
.page-about .about-hero__stats b {
  display: block;
  font-family: var(--f-num);
  font-weight: 600;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.15;
  color: var(--c-amber);
}
.page-about .about-hero__stats span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-stone);
}
.page-about .about-hero__figure {
  margin: 0;
}

/* 通用章节 */
.page-about .about-section {
  padding-block: clamp(40px, 6.5vw, 82px);
  border-bottom: 1px solid var(--c-line);
}
.page-about .about-section__head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}
.page-about .about-section__head h2 {
  margin: 10px 0 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.14;
  letter-spacing: -.01em;
  text-wrap: balance;
}

/* 麻烦描述 */
.page-about .trouble {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  max-width: 78ch;
  border-top: 1px solid var(--c-line);
  padding-top: clamp(20px, 3vw, 32px);
}
.page-about .trouble p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-stone);
}
.page-about .trouble__lead {
  font-family: var(--f-editorial);
  font-size: clamp(17px, 2.2vw, 21px) !important;
  line-height: 1.7 !important;
  color: var(--c-paper) !important;
}

/* 时间轴 */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-line) 65%, transparent);
}
.page-about .tl__item {
  position: relative;
  padding-left: 34px;
  margin-bottom: 14px;
}
.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 206, .1);
}
.page-about .tl__node {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease);
}
.page-about .tl__node:hover,
.page-about .tl__node[open] {
  border-color: var(--c-cyan);
}
.page-about .tl__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .tl__summary::-webkit-details-marker {
  display: none;
}
.page-about .tl__num {
  font-family: var(--f-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-cyan);
}
.page-about .tl__title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.4;
  letter-spacing: .005em;
}
.page-about .tl__meta {
  margin-left: auto;
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-stone);
  text-transform: uppercase;
}
.page-about .tl__summary::after {
  content: "+";
  font-family: var(--f-num);
  font-size: 16px;
  line-height: 1;
  color: var(--c-amber);
}
.page-about .tl__node[open] .tl__summary::after {
  content: "−";
}
.page-about .tl__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--c-line);
  margin-top: 0;
}
.page-about .tl__body p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-stone);
}
.page-about .about-marks {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* 编辑室 */
.page-about .shift-head {
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
  margin-bottom: clamp(24px, 4vw, 38px);
}
.page-about .shift-head__lede {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-stone);
}
.page-about .shift-head__figure {
  margin: 0;
}
.page-about .shift {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}
.page-about .shift__item {
  background: var(--c-panel);
  border-top: 3px solid var(--c-line);
  padding: 20px 18px 24px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .shift__item:hover,
.page-about .shift__item:focus-within {
  border-top-color: var(--c-cyan);
  background: #10263d;
}
.page-about .shift__time {
  display: block;
  font-family: var(--f-num);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-amber);
}
.page-about .shift__title {
  margin: 10px 0 10px;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
}
.page-about .shift__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

/* 覆盖 */
.page-about .scope {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}
.page-about .scope__item {
  background: var(--c-panel);
  padding: 22px 18px 24px;
  border-left: 4px solid var(--c-cyan);
}
.page-about .scope__num {
  display: block;
  font-family: var(--f-num);
  font-weight: 600;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--c-amber);
  letter-spacing: -.02em;
}
.page-about .scope__title {
  margin: 10px 0 10px;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.35;
  color: var(--c-paper);
}
.page-about .scope__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

/* 团队 */
.page-about .crew {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}
.page-about .crew__card {
  position: relative;
  background: var(--c-panel);
  border-left: 4px solid var(--c-moss);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  padding: 18px 18px 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .crew__card:hover {
  border-left-color: var(--c-cyan);
  transform: translateY(-2px);
}
.page-about .crew__coord {
  display: block;
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-stone);
  margin-bottom: 10px;
}
.page-about .crew__card h3 {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.35;
}
.page-about .crew__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-stone);
}
.page-about .creed {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--c-terra);
  font-family: var(--f-editorial);
  font-size: clamp(18px, 2.6vw, 25px);
  line-height: 1.65;
  color: var(--c-paper);
}

/* 找我们 */
.page-about .where {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .where__main p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-stone);
}
.page-about .where__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}
.page-about .where__side {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-amber);
  padding: 20px 18px 22px;
}
.page-about .where__label {
  margin: 0 0 14px;
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-stone);
  text-transform: uppercase;
}
.page-about .where__links {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .where__links li + li {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
}
.page-about .where__links a {
  display: block;
  color: var(--c-paper);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.6;
  transition: color var(--dur) var(--ease);
}
.page-about .where__links a:hover {
  color: var(--c-cyan);
}

/* 收尾 */
.page-about .about-close {
  margin-top: clamp(40px, 7vw, 80px);
  padding: clamp(28px, 5vw, 60px);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(53, 224, 206, .16), transparent 58%),
    linear-gradient(135deg, var(--c-violet-a), var(--c-violet-b));
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}
.page-about .about-close h2 {
  margin: 12px 0 16px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.14;
  color: var(--c-paper);
  letter-spacing: -.01em;
}
.page-about .about-close__text {
  margin: 0 0 clamp(22px, 3.5vw, 30px);
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-stone);
}
.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 断点 */
@media (min-width: 700px) {
  .page-about .scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .shift {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
  .page-about .about-hero__figure {
    margin-top: 28px;
  }
  .page-about .shift-head {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }
  .page-about .crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .crew__card:nth-child(2) {
    margin-top: 30px;
  }
  .page-about .crew__card:nth-child(3) {
    margin-top: 60px;
  }
  .page-about .crew__card:nth-child(5) {
    margin-top: 30px;
  }
  .page-about .where {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: start;
  }
  .page-about .tl__item {
    padding-left: 42px;
    margin-bottom: 18px;
  }
  .page-about .tl::before {
    left: 9px;
  }
  .page-about .tl__item::before {
    left: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__node,
  .page-about .shift__item,
  .page-about .crew__card,
  .page-about .where__links a,
  .page-about .crumbs__item a {
    transition: none;
  }
  .page-about .crew__card:hover {
    transform: none;
  }
}
<<<END>>>