.page-about {
  --about-gap: 20px;
  --about-rule: rgba(111, 208, 140, 0.16);
  background: var(--c-canvas);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--c-muted);
}

.page-about .breadcrumbs__item {
  color: var(--c-muted);
  text-decoration: none;
}

.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--c-ink);
}

.page-about .breadcrumbs__item:hover {
  color: var(--c-moss);
}

.page-about .breadcrumbs__sep {
  color: var(--c-fog);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 32px;
  padding-top: 28px;
  padding-bottom: 56px;
  align-items: center;
}

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

.page-about .about-hero__copy .display-xl {
  margin: 16px 0 20px;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .about-hero__copy .lede {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
  max-width: 46ch;
}

.page-about .about-hero__copy .muted {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 44ch;
}

.page-about .about-hero__copy .btn-row {
  margin-top: 28px;
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  overflow: hidden;
  background: var(--c-panel);
  min-width: 0;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  background: linear-gradient(180deg, rgba(7, 12, 20, 0) 0%, rgba(7, 12, 20, 0.82) 100%);
  pointer-events: none;
}

.page-about .about-hero__visual .media-frame__caption {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 16px;
  z-index: 1;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-ink);
}

/* ---------- 章节通用头部 ---------- */
.page-about .about-head {
  max-width: 62ch;
}

.page-about .about-head .display-lg,
.page-about .about-work__intro .display-lg,
.page-about .about-team__lead .display-lg,
.page-about .about-source__head .display-lg,
.page-about .about-rhythm__inner .display-lg,
.page-about .about-eco__lead .display-lg {
  margin: 10px 0 14px;
  font-size: clamp(24px, 4.4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .muted {
  color: var(--c-muted);
  line-height: 1.78;
}

/* ---------- 品牌历程时间线 ---------- */
.page-about .about-line {
  padding-bottom: 72px;
}

.page-about .about-line__track {
  list-style: none;
  margin: 44px 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--c-line);
  display: grid;
  gap: 38px;
}

.page-about .about-line__node {
  position: relative;
  min-width: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-line__node::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--c-moss);
  box-shadow: 0 0 0 5px var(--about-rule);
  transition: box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-line__node:hover::before {
  background: var(--c-lime);
  box-shadow: 0 0 0 8px rgba(168, 230, 58, 0.18);
}

.page-about .about-line__year {
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--c-lime);
}

.page-about .about-line__body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.35;
}

.page-about .about-line__body p {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.78;
  max-width: 58ch;
}

.page-about .about-line__focus {
  display: inline-block;
  margin-top: 12px !important;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-moss);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-line__node:hover .about-line__focus {
  border-color: var(--c-moss);
  color: var(--c-lime);
}

/* ---------- 我们做的事 ---------- */
.page-about .about-work {
  padding-top: 64px;
  padding-bottom: 64px;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-work__grid {
  display: grid;
  gap: 30px;
}

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

.page-about .about-work__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  min-width: 0;
}

.page-about .about-work__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--c-line);
  transition: padding-left var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-work__item:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-work__item:hover {
  padding-left: 10px;
  border-color: var(--c-moss);
}

.page-about .about-work__num {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--c-clay);
  letter-spacing: 0.04em;
  padding-top: 3px;
}

.page-about .about-work__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.page-about .about-work__item p {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.78;
  max-width: 56ch;
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  padding-top: 64px;
  padding-bottom: 64px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 36px;
}

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

.page-about .about-team__big {
  font-family: var(--font-mono);
  font-size: clamp(40px, 9vw, 76px);
  line-height: 0.95;
  color: var(--c-lime);
  letter-spacing: -0.03em;
  display: block;
  margin-bottom: 4px;
  text-shadow: 0 0 24px rgba(168, 230, 58, 0.28);
}

.page-about .about-team__figure {
  margin: 28px 0 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  overflow: hidden;
  background: var(--c-panel);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-team__figure .media-frame__caption {
  padding: 12px 18px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
}

.page-about .about-team__roles {
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
}

.page-about .about-team__role {
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
  padding: 0 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-team__role:hover {
  transform: translateY(-2px);
  border-color: var(--c-fog);
}

.page-about .about-team__role[open] {
  border-color: var(--c-moss);
}

.page-about .about-team__role summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 0;
  font-weight: 700;
  font-size: 16px;
  color: var(--c-ink);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

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

.page-about .about-team__role summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-moss);
  flex: none;
}

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

.page-about .about-team__role p {
  margin: 0 0 18px;
  color: var(--c-muted);
  line-height: 1.78;
  font-size: 15px;
}

/* ---------- 数据来源 ---------- */
.page-about .about-source {
  padding-top: 64px;
  padding-bottom: 64px;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background:
    linear-gradient(135deg, rgba(228, 113, 60, 0.10) 0%, rgba(7, 12, 20, 0) 42%),
    var(--c-panel);
}

.page-about .about-source__head {
  max-width: 60ch;
}

.page-about .about-source__stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-source__stat {
  background: var(--c-canvas);
  padding: 22px 18px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-source__num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 7vw, 52px);
  line-height: 1;
  color: var(--c-lime);
  letter-spacing: -0.02em;
  text-shadow: 0 0 20px rgba(168, 230, 58, 0.22);
}

.page-about .about-source__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.page-about .about-source__note {
  margin-top: 28px;
  padding-left: 18px;
  border-left: 2px solid var(--c-clay);
  max-width: 62ch;
}

.page-about .about-source__note p {
  margin: 0;
  color: var(--c-ink);
  line-height: 1.8;
  font-size: 15px;
}

/* ---------- 赛季节奏 ---------- */
.page-about .about-rhythm {
  padding-top: 72px;
  padding-bottom: 72px;
}

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

.page-about .about-rhythm__inner .lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .about-rhythm__inner .muted {
  margin-top: 14px;
  font-size: 15px;
}

.page-about .about-rhythm__link {
  display: inline-block;
  margin-top: 22px;
  padding-bottom: 4px;
  color: var(--c-moss);
  text-decoration: none;
  border-bottom: 1px solid var(--c-moss);
  font-weight: 700;
  font-size: 15px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-rhythm__link:hover {
  color: var(--c-lime);
  border-color: var(--c-lime);
}

/* ---------- 行业认可与合作生态 ---------- */
.page-about .about-eco {
  padding-top: 64px;
  padding-bottom: 72px;
  border-top: 1px solid var(--c-line);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 36px;
}

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

.page-about .about-eco__lead p {
  color: var(--c-muted);
  line-height: 1.78;
  max-width: 52ch;
}

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

.page-about .about-eco__groups {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-about .about-eco__group-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  font-weight: 600;
}

.page-about .about-eco__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-eco__tag {
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  font-size: 14px;
  color: var(--c-ink);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-about .about-eco__tag--media {
  border-color: rgba(111, 208, 140, 0.45);
  color: var(--c-moss);
}

.page-about .about-eco__tag--creator {
  border-color: rgba(168, 230, 58, 0.45);
  color: var(--c-lime);
}

.page-about .about-eco__tag--brand {
  border-color: rgba(228, 113, 60, 0.5);
  color: var(--c-clay);
}

.page-about .about-eco__tag--community {
  border-color: rgba(242, 163, 60, 0.45);
  color: var(--c-amber);
}

/* ---------- 收尾视觉 ---------- */
.page-about .about-finale {
  position: relative;
  margin-top: 8px;
  overflow: hidden;
}

.page-about .about-finale__figure {
  position: relative;
  margin: 0;
}

.page-about .about-finale__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  clip-path: polygon(0 10%, 100% 0, 100% 100%, 0 92%);
  filter: saturate(0.95) contrast(1.08);
}

.page-about .about-finale__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16%;
  display: grid;
  gap: 10px;
  padding: 0 24px;
  text-align: center;
  pointer-events: none;
}

.page-about .about-finale__line {
  font-size: clamp(16px, 3.4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  text-shadow: 0 2px 18px rgba(7, 12, 20, 0.9);
}

.page-about .about-finale__line--sub {
  font-family: var(--font-mono);
  font-size: clamp(12px, 2.2vw, 15px);
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--c-lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-line__node {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .about-line__year {
    font-size: 22px;
    padding-top: 2px;
  }

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

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

  .page-about .about-finale__figure img {
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    padding-top: 44px;
    padding-bottom: 88px;
  }

  .page-about .about-hero__visual img {
    aspect-ratio: 4 / 3;
  }

  .page-about .about-work__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-work__intro,
  .page-about .about-team__lead,
  .page-about .about-eco__lead {
    position: sticky;
    top: 120px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-line {
    padding-bottom: 96px;
  }

  .page-about .about-hero__copy .lede {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line__node::before,
  .page-about .about-work__item,
  .page-about .about-team__role,
  .page-about .about-eco__tag {
    transition: none;
  }
}