.page-about {
  --about-gap: clamp(26px, 5vw, 68px);
  --about-rail: 210px;
  --about-ease: cubic-bezier(.32, .72, .28, 1);
  display: block;
  color: var(--text-body);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about p {
  margin: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb-wrap {
  padding-top: calc(var(--header-h) + 22px);
  padding-bottom: 10px;
}

.page-about .breadcrumb {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--limestone);
}

.page-about .breadcrumb a {
  color: var(--limestone);
  border-bottom: 1px solid transparent;
}

.page-about .breadcrumb a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 4vw, 44px);
  padding-bottom: clamp(40px, 7vw, 92px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero-copy .eyebrow {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-hero-copy h1 {
  margin: 0 0 22px;
  color: var(--flood);
  font-family: var(--font-display);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: .01em;
  line-height: .98;
  font-size: clamp(38px, 10vw, 92px);
}

.page-about .about-hero-copy .lede {
  max-width: 37ch;
  font-size: clamp(15px, 2.1vw, 18px);
  line-height: 1.8;
  color: var(--text-body);
}

.page-about .about-hero-media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.page-about .media-caption {
  display: block;
  padding: 12px 2px 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--limestone);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-stats li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
}

.page-about .about-hero-stats li::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--line-strong);
}

.page-about .about-hero-stats li:first-child::before {
  background: var(--lime);
  width: 40px;
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.4vw, 40px);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--flood);
}

.page-about .about-hero-stats li:first-child .about-stat-num {
  color: var(--lime);
}

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

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
  padding-bottom: clamp(64px, 11vw, 150px);
}

/* ---------- 目录 ---------- */
.page-about .about-toc-title {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--limestone);
  text-transform: uppercase;
}

.page-about .about-toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc-list li {
  flex: 0 0 auto;
}

.page-about .about-toc-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--limestone);
  transition: color .24s var(--about-ease), border-color .24s var(--about-ease), background-color .24s var(--about-ease);
}

.page-about .about-toc-list a .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-toc-list a:hover {
  color: var(--flood);
  border-color: var(--line-strong);
  background: var(--ink-2);
}

/* ---------- 内容区 ---------- */
.page-about .about-content {
  display: grid;
  gap: clamp(60px, 9vw, 128px);
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .about-section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: .01em;
  line-height: 1.05;
  font-size: clamp(26px, 6.4vw, 52px);
  color: var(--flood);
}

.page-about .about-lead-line {
  max-width: 34ch;
  font-size: clamp(17px, 2.5vw, 23px);
  line-height: 1.6;
  color: var(--flood);
}

.page-about .about-note {
  margin-top: 14px;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 01 分工 ---------- */
.page-about .about-filter-wrap {
  margin: 30px 0 22px;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-filter .pill {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--limestone);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: color .24s var(--about-ease), border-color .24s var(--about-ease), background-color .24s var(--about-ease);
}

.page-about .about-filter .pill:hover {
  color: var(--flood);
  border-color: var(--line-strong);
}

.page-about .about-filter .pill[aria-pressed="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-crew-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew-card {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: border-color .24s var(--about-ease), transform .24s var(--about-ease);
}

.page-about .about-crew-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-crew-count {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--limestone);
}

.page-about .about-crew-count .num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-crew-name {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--flood);
}

.page-about .about-crew-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-filter-empty {
  margin-top: 18px;
  font-size: 13px;
  color: var(--limestone);
}

.page-about .about-ring-block {
  display: grid;
  gap: 24px;
  margin-top: clamp(30px, 5vw, 52px);
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--line);
}

.page-about .about-ring-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-ring {
  width: 168px;
  height: 168px;
  max-width: 100%;
}

.page-about .about-ring-track {
  fill: none;
  stroke: var(--concrete);
  stroke-width: 15;
  opacity: .6;
}

.page-about .about-ring-seg {
  fill: none;
  stroke-width: 15;
  stroke-linecap: butt;
  transform: rotate(-90deg);
  transform-box: view-box;
  transform-origin: 70px 70px;
}

.page-about .about-seg-1 { stroke: var(--lime);      stroke-dasharray: 122.5 204.2; stroke-dashoffset: 0; }
.page-about .about-seg-2 { stroke: var(--lime-deep); stroke-dasharray: 108.9 217.8; stroke-dashoffset: -122.5; }
.page-about .about-seg-3 { stroke: var(--amber);     stroke-dasharray: 54.5 272.2;  stroke-dashoffset: -231.4; }
.page-about .about-seg-4 { stroke: var(--limestone); stroke-dasharray: 40.8 285.9;  stroke-dashoffset: -285.9; }

.page-about .about-ring-legend {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-ring-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-soft);
}

.page-about .about-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-dot--1 { background: var(--lime); }
.page-about .about-dot--2 { background: var(--lime-deep); }
.page-about .about-dot--3 { background: var(--amber); }
.page-about .about-dot--4 { background: var(--limestone); }

.page-about .about-legend-name {
  min-width: 4em;
  color: var(--flood);
}

.page-about .about-legend-val {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--limestone);
}

/* ---------- 02 流程 ---------- */
.page-about .about-flow-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: 30px;
}

.page-about .about-flow {
  display: grid;
  gap: 10px;
}

.page-about .about-step {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
  overflow: hidden;
  transition: border-color .24s var(--about-ease);
}

.page-about .about-step[open] {
  border-color: var(--line-strong);
}

.page-about .about-step summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-step summary::-webkit-details-marker {
  display: none;
}

.page-about .about-step summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--limestone);
}

.page-about .about-step[open] summary::after {
  content: "－";
  color: var(--lime);
}

.page-about .about-step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--flood);
}

.page-about .about-step-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--limestone);
}

.page-about .about-step-body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .about-step-body p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-flow-media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-flow-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ---------- 03 独立性 ---------- */
.page-about .about-mark {
  margin: 26px 0 0;
  padding: 18px 22px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(255, 176, 32, .07);
}

.page-about .about-mark p {
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.7;
  color: var(--flood);
}

.page-about .about-bound-list {
  display: grid;
  gap: 22px;
  margin: 30px 0 0;
}

.page-about .about-bound-item dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .about-bound-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 04 赛季阶梯 ---------- */
.page-about .about-stairs {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin: 34px 0 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-stair {
  flex: 1 0 104px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-about .about-stair-bar {
  display: block;
  border-radius: var(--r-sm) var(--r-sm) 3px 3px;
  background: linear-gradient(180deg, rgba(184, 255, 60, .34), rgba(184, 255, 60, .06));
  border: 1px solid rgba(184, 255, 60, .28);
  transition: background .28s var(--about-ease), border-color .28s var(--about-ease);
}

.page-about .about-stair:nth-child(1) .about-stair-bar { height: 38px; }
.page-about .about-stair:nth-child(2) .about-stair-bar { height: 64px; }
.page-about .about-stair:nth-child(3) .about-stair-bar { height: 90px; }
.page-about .about-stair:nth-child(4) .about-stair-bar { height: 116px; }
.page-about .about-stair:nth-child(5) .about-stair-bar { height: 142px; }

.page-about .about-stair:nth-child(5) .about-stair-bar {
  background: linear-gradient(180deg, rgba(184, 255, 60, .78), rgba(184, 255, 60, .16));
  border-color: var(--lime);
}

.page-about .about-stair:hover .about-stair-bar {
  background: linear-gradient(180deg, rgba(255, 176, 32, .5), rgba(255, 176, 32, .1));
  border-color: var(--amber);
}

.page-about .about-stair-season {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--flood);
}

.page-about .about-stair-text {
  font-size: 12px;
  line-height: 1.7;
  color: var(--limestone);
}

.page-about .about-season-foot {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  margin-top: clamp(34px, 5vw, 56px);
}

.page-about .about-season-media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-season-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .about-season-copy {
  display: grid;
  gap: 16px;
  align-content: center;
}

.page-about .about-season-copy p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 05 协作 ---------- */
.page-about .about-partner-list {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-partner-list li {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-partner-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--limestone);
}

.page-about .about-partner-val {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.1;
  color: var(--flood);
}

.page-about .about-partner-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 06 班表 ---------- */
.page-about .about-duty-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-duty-card {
  padding: 22px;
  border-radius: var(--r-md);
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-about .about-duty-card:nth-child(3) {
  border-left: 3px solid var(--red);
}

.page-about .about-duty-name {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--flood);
}

.page-about .about-duty-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 正文内链 ---------- */
.page-about .about-content a {
  color: var(--lime);
  border-bottom: 1px solid rgba(184, 255, 60, .38);
  transition: border-color .2s var(--about-ease), color .2s var(--about-ease);
}

.page-about .about-content a:hover {
  color: var(--flood);
  border-bottom-color: var(--flood);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-ring-block {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

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

  .page-about .about-partner-list li {
    grid-template-columns: 120px 190px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
    gap: clamp(40px, 6vw, 88px);
  }

  .page-about .about-hero-media img {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-bound-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-season-foot {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-stair {
    flex: 1 1 0;
  }

  .page-about .about-stair:nth-child(1) .about-stair-bar { height: 56px; }
  .page-about .about-stair:nth-child(2) .about-stair-bar { height: 92px; }
  .page-about .about-stair:nth-child(3) .about-stair-bar { height: 128px; }
  .page-about .about-stair:nth-child(4) .about-stair-bar { height: 164px; }
  .page-about .about-stair:nth-child(5) .about-stair-bar { height: 200px; }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
  }

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

  .page-about .about-toc-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc-list a {
    border-color: transparent;
    border-radius: var(--r-sm);
    padding: 10px 14px;
  }

  .page-about .about-toc-list a:hover {
    border-color: var(--line);
  }

  .page-about .about-crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-duty-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .page-about .about-crew-card:hover {
    transform: none;
  }
}
</main>