.page-about {
  background: var(--night);
  color: var(--white);
  overflow-x: hidden;
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 16px 0 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--brut);
}

.page-about .about-crumbs a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  border-bottom-color: var(--neon);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 6vw, 68px) 0 clamp(30px, 5vw, 62px);
  background: var(--night);
  border-bottom: 2px solid var(--brut);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120px;
  height: 5px;
  background: var(--neon);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 26px;
  align-items: end;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--neon);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-lead-text {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(15px, 1.1vw, 16px);
  line-height: 1.85;
  color: var(--mint);
}

.page-about .about-stamp {
  border: 2px solid var(--neon);
  background: rgba(5, 9, 12, .78);
  padding: 16px 18px;
  box-shadow: 7px 7px 0 var(--brut);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .about-stamp__row {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  color: var(--white);
}

.page-about .about-stamp__row--sub {
  margin-top: 9px;
  color: var(--amber);
}

.page-about .about-dot {
  flex: none;
  width: 9px;
  height: 9px;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(60, 224, 138, .2);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(46px, 9vw, 100px) 0;
  border-bottom: 1px solid var(--brut);
}

.page-about .about-chapter--ink {
  background: var(--ink);
}

.page-about .about-chapter--pitch {
  background: linear-gradient(180deg, var(--night) 0%, var(--pitch) 46%, var(--night) 100%);
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 16px;
  margin-bottom: 24px;
  padding-top: 14px;
  border-top: 3px solid var(--neon);
}

.page-about .about-chapter__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8vw, 68px);
  line-height: .8;
  letter-spacing: -.03em;
  color: var(--neon);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .about-chapter__num {
    color: transparent;
    -webkit-text-stroke: 1.6px var(--neon);
  }
}

.page-about .about-chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 32px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-sublede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.4vw, 19px);
  line-height: 1.75;
  color: var(--mint);
}

/* ---------- 双栏 / 正文 ---------- */
.page-about .about-duo {
  display: grid;
  gap: 26px;
}

.page-about .about-body {
  max-width: 42ch;
  font-size: clamp(15px, 1.05vw, 16px);
  line-height: 1.85;
  color: rgba(242, 246, 244, .88);
}

.page-about .about-body p {
  margin: 0 0 14px;
}

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

.page-about .about-sidebox {
  border: 2px solid var(--brut);
  background: var(--pitch);
  padding: 18px;
  box-shadow: var(--shadow);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mint);
}

.page-about .about-sidebox p {
  margin: 0;
}

.page-about .about-sidebox__label {
  margin-bottom: 8px !important;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--neon);
}

/* ---------- 注释带 ---------- */
.page-about .about-ribbon {
  margin: 28px 0 0;
  border-top: 2px solid var(--brut);
  border-bottom: 2px solid var(--brut);
  border-left: 5px solid var(--neon);
  background: var(--ink);
  padding: 20px clamp(14px, 3vw, 26px);
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.4vw, 19px);
  line-height: 1.72;
  color: var(--mint);
}

.page-about .about-ribbon--alert {
  border-left-color: var(--red);
  color: var(--white);
}

/* ---------- 版本矩阵 ---------- */
.page-about .about-matrix {
  margin: 0 0 30px;
  border: 2px solid var(--brut);
  background: var(--brut);
  overflow: hidden;
}

.page-about .about-matrix__row {
  display: grid;
  grid-template-columns: 1.7fr .7fr .7fr .7fr;
  gap: 1px;
  background: var(--brut);
}

.page-about .about-matrix__row + .about-matrix__row {
  margin-top: 1px;
}

.page-about .about-matrix__row > * {
  background: var(--pitch);
  padding: 11px 8px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-matrix__row--head > * {
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mint);
}

.page-about .about-matrix__row > .about-cell--new {
  color: var(--neon);
  font-weight: 700;
  box-shadow: inset 3px 0 0 var(--neon);
}

.page-about .about-matrix__row > .about-cell--off {
  color: var(--gray);
}

/* ---------- 图片 ---------- */
.page-about .about-banner {
  margin: 0 0 28px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 2px solid var(--brut);
  box-shadow: var(--shadow);
}

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

.page-about .about-portrait img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 11;
  object-fit: cover;
  border: 2px solid var(--brut);
  box-shadow: var(--shadow);
}

.page-about .about-portrait--handbook img {
  aspect-ratio: 3 / 2;
}

/* ---------- 履历清单 ---------- */
.page-about .about-cv {
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  border-top: 2px solid var(--brut);
}

.page-about .about-cv__item {
  display: grid;
  gap: 5px;
  padding: 14px 0 14px 14px;
  border-bottom: 1px solid var(--brut);
  border-left: 3px solid var(--neon);
}

.page-about .about-cv__item:nth-child(2) {
  border-left-color: var(--away);
}

.page-about .about-cv__item:nth-child(3) {
  border-left-color: var(--amber);
}

.page-about .about-cv__item:nth-child(4) {
  border-left-color: var(--gray);
}

.page-about .about-cv dt {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-cv dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(184, 245, 206, .82);
}

/* ---------- 梯队阶梯 ---------- */
.page-about .about-ladder {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-ladder li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  border: 2px solid var(--brut);
  background: var(--ink);
  padding: 13px 14px;
}

.page-about .about-ladder li:nth-child(2) {
  margin-left: clamp(0px, 3vw, 22px);
}

.page-about .about-ladder li:nth-child(3) {
  margin-left: clamp(0px, 6vw, 44px);
}

.page-about .about-ladder__lvl {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--neon);
}

.page-about .about-ladder p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 246, 244, .82);
}

/* ---------- 团队分工 ---------- */
.page-about .about-teams {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--brut);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--brut);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1;
  color: var(--amber);
  min-width: 1.6em;
}

.page-about .about-team__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--white);
}

.page-about .about-team__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 244, .82);
}

/* ---------- 纠错分级 ---------- */
.page-about .about-levels {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-level {
  border: 2px solid var(--brut);
  border-top: 3px solid var(--amber);
  background: var(--pitch);
  padding: 16px 18px;
}

.page-about .about-level--2 {
  border-top-color: var(--away);
}

.page-about .about-level--3 {
  border-top-color: var(--red);
}

.page-about .about-level__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .about-level--2 .about-level__idx {
  color: var(--away);
}

.page-about .about-level--3 .about-level__idx {
  color: var(--red);
}

.page-about .about-level h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--white);
}

.page-about .about-level p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 244, .82);
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  padding: clamp(46px, 8vw, 88px) 0 clamp(36px, 6vw, 64px);
  background: var(--ink);
  border-top: 3px solid var(--neon);
}

.page-about .about-outro__inner {
  display: grid;
  gap: 24px;
  align-items: end;
}

.page-about .about-outro h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.12;
  color: var(--white);
}

.page-about .about-outro p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mint);
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--brut);
}

.page-about .about-outro__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid var(--brut);
  padding-bottom: 3px;
}

.page-about .about-outro__links a:hover,
.page-about .about-outro__links a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--neon);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, .78fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-duo--rev {
    grid-template-columns: minmax(220px, .8fr) minmax(0, 1.4fr);
  }

  .page-about .about-duo--rev .about-body {
    order: 2;
  }

  .page-about .about-duo--rev figure {
    order: 1;
  }

  .page-about .about-matrix__row > * {
    padding: 13px 14px;
    font-size: 13px;
  }

  .page-about .about-levels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-outro__inner {
    grid-template-columns: minmax(0, 1.5fr) auto;
    gap: 40px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero {
    background: linear-gradient(108deg, var(--night) 0 58%, var(--pitch) 58% 100%);
    padding-bottom: clamp(48px, 5vw, 76px);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(240px, .72fr);
    gap: 48px;
  }

  .page-about .about-chapter__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 26px;
  }

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

  .page-about .about-team {
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 1.4fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .about-team__body {
    display: grid;
    grid-template-columns: minmax(140px, .5fr) minmax(0, 1.5fr);
    gap: 22px;
    align-items: baseline;
  }

  .page-about .about-team__body h3 {
    margin-bottom: 0;
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    transform: none !important;
    transition: none !important;
    opacity: 1 !important;
  }
}