.page-about {
  --about-sidebar: minmax(220px, 280px);
  --about-gap: clamp(28px, 5vw, 64px);
  background: var(--c-paper);
  color: var(--c-ink);
  overflow-x: clip;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px 16px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-steel);
}

.page-about .breadcrumb a {
  color: var(--c-ink);
  text-underline-offset: 3px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-thick);
  background: var(--c-navy);
  color: var(--c-white);
}

.page-about .about-hero::after {
  content: "SPEED · ACCURACY · DELIVERY";
  position: absolute;
  right: 16px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: rgba(215, 255, 0, 0.5);
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--about-gap);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 96px) 16px;
}

.page-about .about-hero__kicker {
  margin-bottom: 16px;
  color: var(--c-volt);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-title);
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1.1;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.02em;
}

.page-about .about-hero .lead {
  max-width: 640px;
  margin: 0 0 28px;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .about-hero__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-white);
  border: 2px solid rgba(255, 255, 255, 0.8);
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.page-about .about-hero__link:hover,
.page-about .about-hero__link:focus {
  background: var(--c-white);
  color: var(--c-navy);
}

.page-about .about-hero__ticker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 2px solid rgba(255, 255, 255, 0.25);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-hero__ticker span::before {
  content: "▪ ";
  color: var(--c-volt);
}

.page-about .about-hero__media {
  margin: 0;
  border: var(--border-thick);
  box-shadow: var(--shadow-card);
  background: var(--c-white);
  align-self: center;
}

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

@media (min-width: 760px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 2fr) minmax(200px, 1fr);
    align-items: center;
  }
}

.page-about .story-layout {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 6vw, 72px);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(40px, 7vw, 80px) 16px 80px;
}

.page-about .story-layout::before {
  content: "体坛速递";
  position: absolute;
  top: 120px;
  right: 4px;
  writing-mode: vertical-rl;
  font-family: var(--font-title);
  font-size: clamp(90px, 15vw, 200px);
  font-weight: 900;
  font-style: italic;
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(11, 37, 69, 0.06);
  pointer-events: none;
  z-index: 0;
}

.page-about .story-toc,
.page-about .story-content {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .story-toc__label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
  color: var(--c-steel);
}

.page-about .story-toc .toc {
  border-left: var(--border-thin);
  padding: 4px 0 4px 18px;
}

.page-about .story-toc .toc__link {
  display: block;
  padding: 9px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 37, 69, 0.15);
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.page-about .story-toc .toc__link:last-child {
  border-bottom: 0;
}

.page-about .story-toc .toc__link:hover,
.page-about .story-toc .toc__link.is-current {
  color: var(--c-orange);
  padding-left: 8px;
}

.page-about .story-toc__note {
  margin-top: 26px;
  padding: 18px 16px;
  background: var(--c-white);
  border: 2px solid var(--c-ink);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-steel);
  box-shadow: 6px 6px 0 rgba(11, 37, 69, 0.1);
}

.page-about .story-toc__note a,
.page-about .side-note a,
.page-about .prose a,
.page-about .story-note a {
  color: var(--c-ink);
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-about .story-toc__note-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--c-orange);
}

@media (min-width: 992px) {
  .page-about .story-layout {
    grid-template-columns: var(--about-sidebar) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .story-toc {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }
}

.page-about .story-section {
  border-bottom: var(--border-thick);
  padding-bottom: clamp(44px, 6vw, 72px);
  margin-bottom: clamp(44px, 6vw, 72px);
}

.page-about .story-section:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
  border-bottom: 2px solid var(--c-ink);
  padding-bottom: 18px;
  margin-bottom: 28px;
}

.page-about .section-head__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--c-navy);
  color: var(--c-volt);
  border: var(--border-thin);
  box-shadow: 5px 5px 0 rgba(10, 27, 42, 0.15);
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}

.page-about .section-head__title {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-family: var(--font-title);
}

.page-about .section-head__desc {
  margin: 6px 0 0;
  color: var(--c-steel);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .prose {
  max-width: 46em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .prose p {
  margin: 0 0 1em;
}

.page-about .about-quote {
  position: relative;
  margin: 32px 0 24px;
  padding: 24px;
  background: var(--c-white);
  border: var(--border-thick);
  box-shadow: var(--shadow-card);
}

.page-about .about-quote::before {
  content: "“";
  position: absolute;
  top: 4px;
  left: 12px;
  font-family: var(--font-title);
  font-size: 56px;
  line-height: 1;
  font-weight: 900;
  color: var(--c-orange);
  pointer-events: none;
}

.page-about .about-quote__text {
  margin: 0 0 16px;
  padding-top: 8px;
  font-family: var(--font-title);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  line-height: 1.5;
}

.page-about .about-quote__copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 2px solid var(--c-ink);
  background: var(--c-volt);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 8px 14px;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.page-about .about-quote__copy:hover,
.page-about .about-quote__copy:focus {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--c-ink);
  background: var(--c-paper);
}

.page-about .side-note {
  margin-top: 28px;
  padding: 16px 18px;
  background: rgba(255, 92, 0, 0.06);
  border-left: 4px solid var(--c-orange);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-steel);
  max-width: 42em;
}

.page-about .side-note__label {
  display: block;
  margin-bottom: 6px;
  font-weight: 800;
  color: var(--c-orange);
  font-size: 12px;
}

.page-about .story-note {
  margin-top: 28px;
  padding: 16px 18px;
  border: 2px dashed var(--c-line);
  background: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-steel);
  max-width: 42em;
}

.page-about .story-note__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  color: var(--c-navy);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.page-about .story-divider {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 2px solid var(--c-ink);
  border-bottom: 2px solid var(--c-ink);
  margin: 0 0 clamp(44px, 6vw, 72px);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-steel);
  letter-spacing: 0.5px;
}

.page-about .story-divider span:last-child {
  color: var(--c-orange);
}

.page-about .story-workflow {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: 28px;
}

.page-about .story-workflow__main {
  min-width: 0;
}

.page-about .story-workflow__media {
  margin: 0;
  border: var(--border-thick);
  box-shadow: var(--shadow-card);
  background: var(--c-white);
  align-self: start;
}

.page-about .story-workflow__media img,
.page-about .story-map img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .story-workflow__media figcaption,
.page-about .story-map figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-steel);
  border-top: 2px solid var(--c-ink);
  background: var(--c-white);
}

@media (min-width: 860px) {
  .page-about .story-workflow {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}

.page-about .story-timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-left: 3px solid var(--c-ink);
}

.page-about .story-timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
  margin: 0;
}

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

.page-about .story-timeline__node {
  position: absolute;
  left: -10px;
  top: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-volt);
  border: 3px solid var(--c-ink);
  box-shadow: 2px 2px 0 var(--c-ink);
  transition: transform 0.15s ease, background 0.15s ease;
}

.page-about .story-timeline__item:hover .story-timeline__node {
  transform: scale(1.3);
  background: var(--c-orange);
}

.page-about .story-timeline__tag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 8px;
  background: var(--c-navy);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.page-about .story-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.3;
}

.page-about .story-timeline__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-steel);
  max-width: 32em;
}

.page-about .story-timeline__version {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-orange);
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.page-about .story-timeline__item:hover .story-timeline__version {
  padding-left: 6px;
  color: var(--c-navy);
}

.page-about .story-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0 32px;
}

.page-about .story-metrics__item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 18px 12px;
  background: var(--c-navy);
  color: var(--c-white);
  border: var(--border-thin);
  box-shadow: 5px 5px 0 rgba(10, 27, 42, 0.12);
  text-align: center;
}

.page-about .story-metrics__item:nth-child(3n+2) {
  background: var(--c-ink);
}

.page-about .story-metrics__item:nth-child(4) {
  background: var(--c-orange);
  color: var(--c-ink);
}

.page-about .story-metrics__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-volt);
}

.page-about .story-metrics__item:nth-child(4) .story-metrics__num {
  color: var(--c-ink);
}

.page-about .story-metrics__label {
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-mono);
  letter-spacing: 0.3px;
}

.page-about .story-metrics__item:nth-child(4) .story-metrics__label {
  color: var(--c-ink);
}

@media (min-width: 768px) {
  .page-about .story-metrics {
    grid-template-columns: repeat(6, 1fr);
  }
}

.page-about .story-map {
  margin: 28px 0 32px;
  border: var(--border-thick);
  box-shadow: var(--shadow-card);
  background: var(--c-white);
}

.page-about .about-close {
  margin-top: clamp(40px, 6vw, 64px);
}

.page-about .about-close__panel {
  background: linear-gradient(135deg, var(--c-navy) 0 55%, var(--c-ink) 55% 100%);
  color: var(--c-white);
  border: var(--border-thick);
  box-shadow: var(--shadow-card);
  padding: clamp(24px, 4vw, 40px);
}

.page-about .about-close__title {
  margin: 0 0 20px;
  font-family: var(--font-title);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.3;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}