.page-about {
  --about-max: 1180px;
  --about-berry: #A81B57;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-inner {
  width: min(var(--about-max), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(1.2rem, 3vw, 2rem) clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-crumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.6rem);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .about-crumb li[aria-current] {
  color: var(--paper);
}

.page-about .about-crumb li + li::before {
  content: "／";
  margin-right: 0.45rem;
  color: var(--line);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.4rem);
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-hero-figure {
    margin-top: clamp(1rem, 4vw, 3.6rem);
  }
}

.page-about .about-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-about .about-title {
  margin: 0.7rem 0 1.2rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 6vw, 4.3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .about-title em {
  display: block;
  font-style: normal;
  font-weight: 200;
  color: var(--cyan);
}

.page-about .about-lede {
  margin: 0 0 2rem;
  max-width: 38rem;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  margin: 0;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
}

.page-about .about-hero-stats dt {
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--paper);
}

.page-about .about-stat-num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: 0.04em;
}

.page-about .about-stat-unit {
  margin-left: 0.35rem;
  font-size: 0.78rem;
  color: var(--mist);
  letter-spacing: 0.06em;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-about figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 规模带 ---------- */
.page-about .about-band {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.8rem, 4vw, 2.8rem);
  border-block: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel-deep), var(--ink));
}

.page-about .about-band-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

@media (min-width: 800px) {
  .page-about .about-band-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-band-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--line);
}

.page-about .about-band-item:nth-child(1) { border-left-color: var(--cyan); }
.page-about .about-band-item:nth-child(2) { border-left-color: var(--lime); }
.page-about .about-band-item:nth-child(3) { border-left-color: var(--copper); }
.page-about .about-band-item:nth-child(4) { border-left-color: var(--gold); }

.page-about .about-band-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-band-v {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.2vw, 2.1rem);
  letter-spacing: 0.04em;
  color: var(--paper);
  line-height: 1.2;
}

.page-about .about-band-v em {
  display: block;
  margin-top: 0.25rem;
  font-style: normal;
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 800px) {
  .page-about .about-band-v em {
    font-size: 0.72rem;
  }
}

.page-about .about-band-spark {
  position: absolute;
  right: -16px;
  bottom: 0;
  width: min(300px, 42%);
  height: 72px;
  opacity: 0.4;
  pointer-events: none;
}

.page-about .about-band-spark polyline {
  fill: none;
  stroke: var(--lime);
  stroke-width: 2;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapters {
  display: flex;
  flex-direction: column;
  gap: clamp(3rem, 7vw, 6rem);
  padding-block: clamp(2.8rem, 6vw, 5rem);
}

.page-about .about-chapter {
  display: grid;
  gap: 1.1rem;
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
}

.page-about .about-aside {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

@media (min-width: 900px) {
  .page-about .about-aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
    flex-direction: column;
    gap: 0.4rem;
  }
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

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

.page-about .about-body h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.6vw, 2.5rem);
  line-height: 1.22;
  letter-spacing: -0.005em;
}

.page-about .about-body h3 {
  margin: 2.2rem 0 0.8rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.8vw, 1.22rem);
}

.page-about .about-body > p {
  max-width: 40rem;
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-body > p.about-lead {
  font-size: clamp(1.02rem, 1.5vw, 1.1rem);
  color: var(--paper);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 1.1rem;
  margin: 1.7rem 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline li {
  padding-left: 1.15rem;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline-k {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 38rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-figure {
  margin: 2rem 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  object-fit: cover;
}

/* ---------- 生产流程 ---------- */
.page-about .about-steps {
  position: relative;
  display: grid;
  gap: 0.9rem;
  margin: 1.8rem 0 2rem;
  padding: 0;
  list-style: none;
}

@media (min-width: 840px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-steps::before {
    content: "";
    position: absolute;
    top: 5px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), var(--violet), var(--magenta));
    opacity: 0.38;
  }
}

.page-about .about-steps > li {
  position: relative;
  padding-top: 1.7rem;
}

@media (min-width: 840px) {
  .page-about .about-steps > li {
    padding-top: 1.6rem;
  }
}

.page-about .about-steps > li::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-about .about-steps details {
  height: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  transition: border-color 0.25s var(--ease);
}

.page-about .about-steps details[open] {
  border-color: rgba(53, 230, 210, 0.45);
}

.page-about .about-steps summary {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-steps summary::marker {
  content: "";
}

.page-about .about-step-k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-step-t {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--paper);
}

.page-about .about-step-time {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-steps .about-step-x {
  margin: 0.7rem 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 奶油纸质区块 ---------- */
.page-about .about-band-paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-block: 1px solid rgba(42, 33, 28, 0.28);
}

.page-about .about-band-paper .about-chapters {
  padding-block: clamp(2.8rem, 6vw, 5rem);
}

.page-about .about-band-paper .about-num {
  color: var(--about-berry);
}

.page-about .about-band-paper .about-tag {
  color: rgba(42, 33, 28, 0.62);
}

.page-about .about-band-paper .about-body > p {
  color: rgba(42, 33, 28, 0.82);
}

.page-about .about-band-paper .about-body > p.about-lead {
  color: var(--paper-ink);
}

/* ---------- 赛事覆盖 ---------- */
.page-about .about-events {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1.6rem 0 0;
  padding: 0 0 2.8rem;
  list-style: none;
}

@media (min-width: 640px) {
  .page-about .about-events {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .about-events {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-event {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.85rem 0.9rem;
  border: 1px solid rgba(42, 33, 28, 0.24);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.42);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-event:hover,
.page-about .about-event:focus-within {
  z-index: 3;
  transform: translateY(-2px);
  border-color: rgba(168, 27, 87, 0.6);
  background: rgba(255, 255, 255, 0.72);
}

.page-about .about-event-cat {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(42, 33, 28, 0.6);
}

.page-about .about-event-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--paper-ink);
}

.page-about .about-event-freq {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--about-berry);
}

.page-about .about-event-tip {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 4;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--paper-ink);
  color: var(--paper);
  font-size: 11.5px;
  line-height: 1.65;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
}

@media (hover: hover) {
  .page-about .about-event:hover .about-event-tip,
  .page-about .about-event:focus-within .about-event-tip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

.page-about .about-phases {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 820px) {
  .page-about .about-phases {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-phase {
  padding-top: 0.7rem;
  border-top: 2px solid rgba(42, 33, 28, 0.55);
}

.page-about .about-phase-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--about-berry);
}

.page-about .about-phase-name {
  display: block;
  margin: 0.3rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper-ink);
}

.page-about .about-phase p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(42, 33, 28, 0.78);
}

/* ---------- 团队 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 0.8rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 780px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.3rem 1rem;
  padding: 1.1rem 1.2rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-card);
  transition: transform 0.22s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-2px);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-role-name {
  align-self: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .about-role p {
  grid-column: 2;
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1rem;
  margin: 1.6rem 0 1.4rem;
}

@media (min-width: 780px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-partner {
  padding: 1.2rem 1.25rem 1.3rem;
  border: 1px solid rgba(42, 33, 28, 0.28);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.5);
}

.page-about .about-partner h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
  color: var(--paper-ink);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(42, 33, 28, 0.8);
}

/* ---------- 做事方式 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 1rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-principle {
  padding: 1.15rem 1.25rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(18, 22, 31, 0.92), rgba(7, 9, 14, 0.55));
}

.page-about .about-principle:nth-child(2) { border-left-color: var(--lime); }
.page-about .about-principle:nth-child(3) { border-left-color: var(--cyan); }

.page-about .about-principle h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .about-principle p {
  margin: 0 0 0.7rem;
  max-width: 40rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-principle .about-proof {
  margin: 0;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--lime);
}

/* ---------- 收束带 ---------- */
.page-about .about-close {
  padding-block: clamp(2.8rem, 7vw, 5rem);
  background: var(--paper);
  color: var(--paper-ink);
  border-top: 1px solid rgba(42, 33, 28, 0.28);
}

.page-about .about-close-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 880px) {
  .page-about .about-close-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 3rem;
  }
}

.page-about .about-close .about-eyebrow {
  color: var(--about-berry);
}

.page-about .about-close h2 {
  margin: 0.7rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  color: var(--paper-ink);
}

.page-about .about-close p {
  margin: 0;
  max-width: 34rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(42, 33, 28, 0.82);
}

.page-about .about-close-links {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-close-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.05rem;
  border: 1px solid rgba(42, 33, 28, 0.3);
  border-radius: var(--radius-sm);
  color: var(--paper-ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-close-links a::after {
  content: "→";
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--about-berry);
}

.page-about .about-close-links a:hover {
  border-color: var(--about-berry);
  background: rgba(255, 255, 255, 0.55);
  transform: translateX(2px);
}