.page-about {
  position: relative;
  display: block;
  overflow-x: hidden;
  background: var(--yk-ink);
  color: var(--yk-cream);
  font-family: var(--yk-font-sans);
  font-size: 15px;
  line-height: 1.75;
  --about-gap: 20px;
  --about-pad: 20px;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about .yk-shell {
  padding-left: var(--about-pad);
  padding-right: var(--about-pad);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 48px;
  border-bottom: 1px solid var(--yk-line);
  background:
    radial-gradient(130% 90% at 92% -10%, rgba(59, 232, 200, 0.14), transparent 62%),
    linear-gradient(180deg, var(--yk-ink) 0%, var(--yk-ink-2) 100%);
}

.page-about .about-hero__mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(31, 78, 62, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 78, 62, 0.6) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.45;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -110px;
  width: 260px;
  height: 260px;
  background: linear-gradient(150deg, rgba(255, 122, 47, 0.18), transparent 72%);
  transform: rotate(10deg);
  pointer-events: none;
}

.page-about .about-hero .yk-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yk-mist);
}

.page-about .about-crumb a {
  color: var(--yk-mist);
  text-decoration: none;
}

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

.page-about .about-crumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--yk-stone);
}

.page-about .about-crumb li[aria-current="page"] {
  color: var(--yk-cream);
}

.page-about .about-kicker {
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 3px solid var(--yk-orange);
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--yk-cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 26px;
  max-width: 22ch;
  font-size: clamp(28px, 8vw, 54px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.03em;
  color: var(--yk-cream);
}

.page-about .about-hero__lede {
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 1px solid var(--yk-line);
  font-size: 15px;
  line-height: 1.85;
  color: var(--yk-cream);
}

.page-about .about-hero__sub {
  margin: 0;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-hero__side {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--yk-line);
  border: 1px solid var(--yk-line);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  background: var(--yk-ink-2);
}

.page-about .about-figure--accent {
  background: var(--yk-ink-3);
}

.page-about .about-figure__num {
  font-family: var(--yk-font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--yk-cyan);
}

.page-about .about-figure--accent .about-figure__num {
  color: var(--yk-orange);
}

.page-about .about-figure__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--yk-mist);
}

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  position: relative;
  padding: 48px 0 56px;
  border-top: 1px solid var(--yk-line);
}

.page-about .about-sec--tight {
  padding: 40px 0 48px;
}

.page-about .about-sec--loose {
  padding: 56px 0 72px;
}

.page-about .about-sec--last {
  border-bottom: 1px solid var(--yk-line);
}

.page-about .about-sechead {
  margin-bottom: 28px;
  padding-left: 14px;
  border-left: 4px solid var(--yk-cyan);
}

.page-about .about-sechead--moss {
  border-left-color: var(--yk-moss);
}

.page-about .about-sechead--orange {
  border-left-color: var(--yk-orange);
}

.page-about .about-sechead__num {
  margin: 0 0 8px;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--yk-cyan);
}

.page-about .about-sechead--moss .about-sechead__num {
  color: var(--yk-moss);
}

.page-about .about-sechead--orange .about-sechead__num {
  color: var(--yk-orange);
}

.page-about .about-sechead .yk-section__title {
  margin: 0;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--yk-cream);
}

.page-about .about-sechead__lede {
  margin: 10px 0 0;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--yk-cream);
}

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

/* ---------- 引述块 ---------- */

.page-about .about-quote {
  margin-top: 24px;
  padding: 20px 18px;
  background: var(--yk-ink-2);
  border-top: 2px solid var(--yk-clay);
}

.page-about .about-quote__mark {
  margin: 0;
  font-size: 34px;
  line-height: 1;
  color: var(--yk-clay);
}

.page-about .about-quote__text {
  margin: 6px 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--yk-cream);
}

.page-about .about-quote__src {
  margin: 0;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--yk-mist);
}

/* ---------- 三支小组 ---------- */

.page-about .about-crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-crew__item {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--yk-ink-2);
  border-top: 3px solid var(--yk-cyan);
}

.page-about .about-crew__item--moss {
  border-top-color: var(--yk-moss);
}

.page-about .about-crew__item--clay {
  border-top-color: var(--yk-clay);
}

.page-about .about-crew__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  margin-bottom: 10px;
}

.page-about .about-crew__code {
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--yk-stone);
}

.page-about .about-crew__name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--yk-cream);
}

.page-about .about-crew__duty {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-crew__meter {
  height: 4px;
  margin-bottom: 14px;
  background: var(--yk-ink-3);
}

.page-about .about-crew__meter span {
  display: block;
  height: 100%;
  background: var(--yk-cyan);
}

.page-about .about-crew__item--moss .about-crew__meter span {
  background: var(--yk-moss);
}

.page-about .about-crew__item--clay .about-crew__meter span {
  background: var(--yk-clay);
}

.page-about .about-crew__item:nth-child(1) .about-crew__meter span {
  width: 41%;
}

.page-about .about-crew__item:nth-child(2) .about-crew__meter span {
  width: 26%;
}

.page-about .about-crew__item:nth-child(3) .about-crew__meter span {
  width: 32%;
}

.page-about .about-crew__fields {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.9;
  color: var(--yk-cream);
}

.page-about .about-crew__fields li {
  padding-left: 14px;
  position: relative;
}

.page-about .about-crew__fields li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 1.5px;
  background: var(--yk-cyan);
}

.page-about .about-crew__photo {
  margin-top: 22px;
}

/* ---------- 班次 ---------- */

.page-about .about-shift__photo {
  margin: 0 auto 28px;
  width: min(100%, 1400px);
}

.page-about .about-shifts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: shift;
}

.page-about .about-shift {
  position: relative;
  padding: 16px 16px 16px 18px;
  background: var(--yk-ink-2);
  border-left: 3px solid var(--yk-stone);
}

.page-about .about-shift--cyan {
  border-left-color: var(--yk-cyan);
}

.page-about .about-shift--orange {
  border-left-color: var(--yk-orange);
}

.page-about .about-shift--clay {
  border-left-color: var(--yk-clay);
}

.page-about .about-shift__time {
  margin: 0 0 6px;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yk-mist);
}

.page-about .about-shift__name {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--yk-cream);
}

.page-about .about-shift--cyan .about-shift__name {
  color: var(--yk-cyan);
}

.page-about .about-shift--orange .about-shift__name {
  color: var(--yk-orange);
}

.page-about .about-shift__desc {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-shift__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
}

/* ---------- 四道环节 ---------- */

.page-about .about-flow {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding-bottom: 22px;
  position: relative;
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 34px;
  bottom: 0;
  width: 1px;
  background: var(--yk-line);
}

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

.page-about .about-flow__step:last-child::before {
  display: none;
}

.page-about .about-flow__num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 34px;
  font-family: var(--yk-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--yk-cyan);
  background: var(--yk-ink-3);
  border: 1px solid var(--yk-line);
}

.page-about .about-flow__body h3 {
  margin: 4px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--yk-cream);
}

.page-about .about-flow__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-flow__photo {
  margin: 24px 0 0;
}

.page-about .about-flow__note {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--yk-ink-3);
  border-left: 3px solid var(--yk-orange);
}

.page-about .about-flow__note-title {
  margin: 0 0 6px;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yk-orange);
}

.page-about .about-flow__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--yk-cream);
}

/* ---------- 赛季长卷 ---------- */

.page-about .about-eras {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-era {
  --era: var(--yk-stone);
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0 18px 20px;
  border-left: 3px solid var(--era);
}

.page-about .about-era:nth-child(1) { --era: var(--yk-clay); }
.page-about .about-era:nth-child(2) { --era: var(--yk-moss); }
.page-about .about-era:nth-child(3) { --era: var(--yk-cyan); }
.page-about .about-era:nth-child(4) { --era: var(--yk-orange); }
.page-about .about-era:nth-child(5) { --era: var(--yk-cyan); }

.page-about .about-era::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--yk-ink);
  border: 2px solid var(--era);
  transform: rotate(45deg);
}

.page-about .about-era__when {
  margin: 0;
  font-family: var(--yk-font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--era);
}

.page-about .about-era__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--yk-cream);
}

.page-about .about-era__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

/* ---------- 合作与认可 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-partners__title {
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--yk-line);
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--yk-mist);
}

.page-about .about-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__list li {
  padding: 0 0 16px 16px;
  margin-bottom: 16px;
  border-left: 2px solid var(--yk-line);
}

.page-about .about-partners__list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-partners__list h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--yk-cream);
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-partners__col--award {
  padding: 22px 18px;
  background:
    linear-gradient(160deg, rgba(255, 122, 47, 0.1), transparent 68%),
    var(--yk-ink-2);
  border-left: 3px solid var(--yk-orange);
}

.page-about .about-partners__col--award .about-partners__title {
  border-bottom-color: transparent;
  color: var(--yk-orange);
}

.page-about .about-award__num {
  margin: 0 0 10px;
  font-family: var(--yk-font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--yk-orange);
}

.page-about .about-award__text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--yk-cream);
}

.page-about .about-award__meta {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

/* ---------- 三件事 ---------- */

.page-about .about-pledge {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-pledge__item {
  position: relative;
  padding: 20px 18px;
  background: var(--yk-ink-2);
  border-bottom: 2px solid var(--yk-moss);
}

.page-about .about-pledge__item--cyan {
  border-bottom-color: var(--yk-cyan);
}

.page-about .about-pledge__item--orange {
  border-bottom-color: var(--yk-orange);
}

.page-about .about-pledge__idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--yk-stone);
}

.page-about .about-pledge__item h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--yk-cream);
}

.page-about .about-pledge__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yk-mist);
}

.page-about .about-tail {
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--yk-line);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--yk-mist);
}

.page-about .about-tail a {
  color: var(--yk-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 232, 200, 0.35);
}

.page-about .about-tail a:hover,
.page-about .about-tail a:focus-visible {
  border-bottom-color: var(--yk-cyan);
}

/* ---------- 图片容器 ---------- */

.page-about .yk-media {
  margin: 0;
  overflow: hidden;
  background: var(--yk-ink-3);
  border: 1px solid var(--yk-line);
}

.page-about .yk-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 桌面端 ---------- */

@media (min-width: 768px) {
  .page-about {
    --about-gap: 24px;
    --about-pad: 32px;
  }

  .page-about .about-hero {
    padding: 36px 0 64px;
  }

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

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

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

  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

  .page-about .about-prose p,
  .page-about .about-hero__lede {
    font-size: 16px;
  }

  .page-about .about-sec {
    padding: 64px 0 72px;
  }

  .page-about .about-sec--tight {
    padding: 52px 0 60px;
  }

  .page-about .about-sec--loose {
    padding: 72px 0 88px;
  }

  .page-about .about-sechead {
    margin-bottom: 36px;
  }
}

@media (min-width: 1024px) {
  .page-about .yk-grid--split {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .yk-grid--split > .yk-col-main {
    grid-column: span 7;
    min-width: 0;
  }

  .page-about .yk-grid--split > .yk-col-side {
    grid-column: span 4;
    min-width: 0;
  }

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

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

  .page-about .about-shift {
    border-left-width: 3px;
    border-right: 1px solid var(--yk-line);
    padding: 20px 18px 24px;
  }

  .page-about .about-shift:last-child {
    border-right: none;
  }

  .page-about .about-era {
    grid-template-columns: 160px 1fr;
    gap: 24px;
    padding: 22px 0 22px 24px;
  }

  .page-about .about-era__when {
    padding-top: 2px;
  }

  .page-about .about-flow__photo {
    margin-top: 0;
  }

  .page-about .about-crew__photo {
    margin-top: 28px;
  }

  .page-about .about-hero__body {
    align-items: start;
  }

  .page-about .about-hero__side {
    margin-top: 0;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero h1 {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }
}