.page-about {
  --about-node-gap: clamp(22px, 3.4vw, 34px);
  --about-read: 66ch;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-top {
  padding-top: clamp(18px, 3vw, 32px);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(26px, 4.5vw, 52px) clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(12px, 2vw, 20px);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-kicker__no {
  color: var(--cyan);
  font-weight: 300;
  letter-spacing: .1em;
}

.page-about .about-h1 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 700;
  letter-spacing: -.02em;
  font-size: clamp(29px, 5.4vw, 56px);
  line-height: 1.16;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-lead {
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  max-width: var(--about-read);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: linear-gradient(158deg, rgba(56, 225, 230, .1), rgba(124, 92, 255, .06) 60%, rgba(12, 20, 36, .9));
  border: 1px solid var(--line);
  border-left: 2px solid rgba(56, 225, 230, .55);
}

.page-about .about-fact__n {
  font-weight: 200;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-fact__n em {
  font-style: normal;
  font-size: .55em;
  margin-left: .14em;
  color: var(--cyan);
}

.page-about .about-fact__l {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* 侧栏 + 正文 */
.page-about .about-shell {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(28px, 5vw, 56px);
}

.page-about .about-rail {
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.page-about .about-rail__h {
  display: none;
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 300;
  letter-spacing: .24em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-rainav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rainav::-webkit-scrollbar {
  display: none;
}

.page-about .about-rainav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.35;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-rainav a .mono {
  font-weight: 300;
  font-size: 11px;
  color: var(--cyan);
  opacity: .8;
}

.page-about .about-rainav a:hover,
.page-about .about-rainav a:focus-visible {
  color: var(--white);
  border-color: rgba(240, 178, 74, .7);
  background: rgba(240, 178, 74, .07);
}

.page-about .about-rainav__sub {
  display: none;
}

/* 章节通用 */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-sec {
  padding-block: clamp(32px, 5.5vw, 64px);
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 22px);
  align-items: start;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-secno {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(28px, 4.2vw, 44px);
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--white);
  opacity: .4;
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: clamp(20px, 2.9vw, 30px);
  line-height: 1.34;
  letter-spacing: -.015em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-sec__body > p,
.page-about .about-cover__txt > p,
.page-about .about-teamcope > p {
  margin: 0 0 14px;
  max-width: var(--about-read);
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-sec__body > p:last-child,
.page-about .about-cover__txt > p:last-child,
.page-about .about-teamcope > p:last-child {
  margin-bottom: 0;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 230, .4);
  transition: color .18s var(--ease), border-bottom-color .18s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--amber);
}

/* 直营三点 */
.page-about .about-plain {
  list-style: none;
  counter-reset: about-p;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-plain > li {
  counter-increment: about-p;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--ink);
}

.page-about .about-plain > li::before {
  content: "0" counter(about-p);
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 12px;
  line-height: 1.9;
  color: var(--amber);
  letter-spacing: .06em;
}

.page-about .about-plain__t {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-about .about-plain > li p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 时间线 */
.page-about .about-tlbanner {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
}

.page-about .about-tlbanner img,
.page-about .about-teamfig img,
.page-about .about-coverfig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--about-node-gap);
}

.page-about .about-node {
  position: relative;
  padding-left: 30px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(5, 7, 14, .95);
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 26px;
  bottom: calc(-1 * var(--about-node-gap));
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(56, 225, 230, .55), rgba(124, 92, 255, .18));
}

.page-about .about-node:last-child::after {
  display: none;
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 6px;
  font-weight: 200;
  font-size: clamp(30px, 4.6vw, 48px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--white);
  opacity: .85;
}

.page-about .about-node__t {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-about .about-node p:last-child {
  margin: 0;
  max-width: var(--about-read);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
}

.page-about .about-teamfig {
  margin: 0;
  border: 1px solid var(--line);
}

.page-about .about-teamcope {
  min-width: 0;
}

.page-about .about-bars {
  list-style: none;
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .about-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-bar__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-bar__num {
  flex: none;
  font-weight: 300;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-bar__track {
  height: 6px;
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .about-bar--46 .about-bar__fill { width: 38.34%; }
.page-about .about-bar--32 .about-bar__fill { width: 26.67%; }
.page-about .about-bar--22 .about-bar__fill { width: 18.33%; }
.page-about .about-bar--20 .about-bar__fill { width: 16.66%; }

.page-about .about-bar__d {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 数据带 */
.page-about .about-band {
  display: grid;
  gap: 1px;
  margin: clamp(32px, 5vw, 56px) 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-band__cell {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: clamp(18px, 3vw, 26px) clamp(14px, 2vw, 20px);
  background: linear-gradient(158deg, rgba(56, 225, 230, .1), rgba(124, 92, 255, .06) 55%, rgba(5, 7, 14, 1));
}

.page-about .about-band__n {
  font-weight: 200;
  font-size: clamp(36px, 6vw, 64px);
  line-height: .95;
  letter-spacing: -.045em;
  color: var(--white);
}

.page-about .about-band__n em {
  font-style: normal;
  font-size: .42em;
  margin-left: .14em;
  color: var(--cyan);
}

.page-about .about-band__l {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* 覆盖 */
.page-about .about-cover {
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
}

.page-about .about-coverfig {
  margin: 0;
  border: 1px solid var(--line);
}

/* 质量节奏 */
.page-about .about-certs {
  display: grid;
  gap: 10px;
  margin: clamp(18px, 3vw, 26px) 0;
}

.page-about .about-cert {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: var(--hull);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
}

.page-about .about-cert__n {
  font-weight: 200;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--amber);
}

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

.page-about .about-rhythm {
  list-style: none;
  margin: clamp(16px, 2.6vw, 24px) 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-rhythm li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--ink);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-rhythm .tag {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  white-space: nowrap;
  color: var(--cyan);
  border: 1px solid rgba(56, 225, 230, .4);
  padding: 2px 8px;
}

/* 末尾索引 */
.page-about .about-next {
  padding-top: clamp(28px, 4.5vw, 48px);
  border-top: 1px solid var(--line);
}

.page-about .about-next__t {
  margin: 8px 0 clamp(16px, 2.6vw, 24px);
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.015em;
  color: var(--white);
}

.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-next__links a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink);
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-next__links a .mono {
  font-weight: 300;
  font-size: 11px;
  color: var(--cyan);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  background: var(--hull);
  color: var(--amber);
}

/* 断点 */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
  }

  .page-about .about-fact {
    border: 0;
    border-left: 0;
    padding: 16px;
    background: linear-gradient(170deg, rgba(56, 225, 230, .09), rgba(5, 7, 14, 1));
  }

  .page-about .about-fact:first-child {
    border-left: 2px solid rgba(56, 225, 230, .55);
  }

  .page-about .about-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-certs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-band {
    grid-template-columns: 1.15fr .85fr 1fr 1.2fr;
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-about .about-cover {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }

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

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 176px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--cmd-h) + 24px);
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-rail__h {
    display: block;
  }

  .page-about .about-rainav {
    display: grid;
    gap: 2px;
    overflow-x: visible;
  }

  .page-about .about-rainav > li {
    display: block;
  }

  .page-about .about-rainav a {
    border: 0;
    border-left: 2px solid transparent;
    padding: 7px 0 7px 12px;
    white-space: normal;
  }

  .page-about .about-rainav a:hover,
  .page-about .about-rainav a:focus-visible {
    background: transparent;
    border-left-color: var(--amber);
  }

  .page-about .about-rainav__sub {
    display: grid;
    gap: 1px;
    list-style: none;
    margin: 2px 0 10px;
    padding: 0 0 0 26px;
  }

  .page-about .about-rainav__sub a {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .02em;
    padding: 4px 0 4px 10px;
    border-left: 1px solid transparent;
    color: var(--muted);
    opacity: .8;
  }

  .page-about .about-rainav__sub a:hover,
  .page-about .about-rainav__sub a:focus-visible {
    border-left-color: rgba(56, 225, 230, .6);
    color: var(--cyan);
    opacity: 1;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.05fr);
    align-items: end;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rainav a,
  .page-about .about-link,
  .page-about .about-next__links a {
    transition-duration: .01ms;
  }
}