.page-about {
  --about-border: 2px solid var(--ink-4);
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--ink);
  color: var(--paper);
  padding-top: var(--header-h);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-block: 1.25rem 0.25rem;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--ink-4);
}

.page-about .breadcrumb-link {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 标题节奏 ---------- */
.page-about .eyebrow {
  color: var(--lime);
  letter-spacing: 0.2em;
}

.page-about .section-title {
  color: var(--paper);
  font-family: var(--f-display);
  font-weight: 300;
  letter-spacing: -0.01em;
}

.page-about .section-lede {
  color: rgba(244, 247, 242, 0.72);
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(640px, 78vw);
  height: min(640px, 78vw);
  background: radial-gradient(circle at 58% 42%, rgba(182, 255, 59, 0.16), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(320px, 60vw);
  height: 4px;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero__title {
  margin: 1rem 0 0;
  font-family: var(--f-display);
  font-weight: 200;
  font-size: clamp(2.5rem, 8.5vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__title span {
  display: block;
  font-weight: 800;
  color: var(--lime);
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: 1.5rem 0 0;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-hero__panel {
  align-self: end;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: var(--about-border);
  border-top: 3px solid var(--lime);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__panel-title {
  margin: 0 0 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

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

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--ink-4);
}

.page-about .about-hero__stats .num {
  font-family: var(--f-num);
  font-size: clamp(1.6rem, 4.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-hero__stats em {
  font-style: normal;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-about .about-hero__panel-note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--ink-4);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding-block: clamp(2rem, 5vw, 4rem);
}

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

.page-about .about-origin__media {
  margin: 0;
}

.page-about .about-origin__media .frame {
  border: var(--about-border);
  box-shadow: var(--shadow-hard);
}

.page-about .about-origin__caption {
  margin-top: 0.85rem;
  font-family: var(--f-num);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-about .about-origin__text p {
  margin: 0 0 1.1rem;
  line-height: 1.9;
  font-size: 1rem;
  color: rgba(244, 247, 242, 0.8);
}

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

/* ---------- 赛季阶段 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--ink-4);
  border-bottom: 1px solid var(--ink-4);
  background: var(--ink-2);
}

.page-about .about-timeline__track {
  display: grid;
  gap: 0;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-stage {
  position: relative;
  padding: 1.25rem 0 1.5rem 2.25rem;
  border-left: 2px solid var(--ink-4);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-about .about-stage:last-child {
  padding-bottom: 0.5rem;
}

.page-about .about-stage__node {
  position: absolute;
  top: 1.5rem;
  left: -9px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--lime);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 3px var(--ink-2);
}

.page-about .about-stage.is-current .about-stage__node {
  background: var(--orange);
}

.page-about .about-stage__season {
  margin: 0;
  font-family: var(--f-num);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-stage.is-current .about-stage__season {
  color: var(--orange);
}

.page-about .about-stage__title {
  margin: 0.45rem 0 0.6rem;
  font-family: var(--f-display);
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-stage__desc {
  margin: 0;
  max-width: 46ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.75);
}

/* ---------- 团队角色 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-team__media .frame {
  border: var(--about-border);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team__roles {
  display: grid;
  gap: 1rem;
}

.page-about .about-role {
  padding: clamp(1.1rem, 2.5vw, 1.5rem);
  border: var(--about-border);
  background: var(--ink-2);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-role:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-lime);
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
}

.page-about .about-role__num {
  font-family: var(--f-num);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0.75rem 0 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.76);
}

/* ---------- 生产节奏 ---------- */
.page-about .about-process {
  border-top: 1px solid var(--ink-4);
}

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

.page-about .about-process__lede {
  margin: 1rem 0 0;
  max-width: 48ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.74);
}

.page-about .about-flowline {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.75rem;
}

.page-about .about-flowline__base {
  fill: none;
  stroke: var(--ink-4);
  stroke-width: 2;
}

.page-about .about-flowline__live {
  fill: none;
  stroke: var(--lime);
  stroke-width: 2;
  stroke-dasharray: 8 10;
}

.page-about .about-svg-node {
  fill: var(--orange);
}

.page-about .about-svg-node--lime {
  fill: var(--lime);
}

.page-about .about-flowline__label {
  fill: var(--steel);
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.page-about .about-step {
  border: var(--about-border);
  border-bottom: 0;
  background: var(--ink-2);
}

.page-about .about-step:last-child {
  border-bottom: var(--about-border);
}

.page-about .about-step[open] {
  box-shadow: inset 4px 0 0 0 var(--lime);
}

.page-about .about-step__head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem clamp(1rem, 2.5vw, 1.4rem);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-step__head:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .about-step__num {
  font-family: var(--f-num);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-step__title {
  flex: 1;
  font-family: var(--f-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-step__icon {
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-step[open] .about-step__icon {
  transform: rotate(-135deg);
}

.page-about .about-step__body {
  padding: 0 clamp(1rem, 2.5vw, 1.4rem) 1.35rem;
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-cover__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-cover__media .frame {
  border: var(--about-border);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cover__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cover__list li {
  display: grid;
  grid-template-columns: minmax(3.6rem, auto) minmax(0, 1fr);
  gap: 0.25rem 1rem;
  align-items: baseline;
  padding: 1rem 0;
  border-top: 1px solid var(--ink-4);
}

.page-about .about-cover__list li:last-child {
  border-bottom: 1px solid var(--ink-4);
}

.page-about .about-cover__list .num {
  font-family: var(--f-num);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-cover__list p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- 合作生态（暖纸色区块） ---------- */
.page-about .about-partners__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3.5rem);
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--ink-4);
  box-shadow: var(--shadow-orange);
}

.page-about .about-partners__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -70px;
  width: 210px;
  height: 210px;
  border: 2px solid rgba(255, 106, 26, 0.45);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-about .about-partners__panel > * {
  position: relative;
  z-index: 1;
}

.page-about .about-partners__panel .eyebrow {
  color: rgba(11, 15, 14, 0.55);
}

.page-about .about-partners__panel .section-title {
  color: var(--ink);
  max-width: 24ch;
}

.page-about .about-partners__text {
  margin: 1.1rem 0 0;
  max-width: 68ch;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(11, 15, 14, 0.82);
}

.page-about .about-partners__list {
  display: grid;
  gap: 0.9rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(11, 15, 14, 0.8);
}

.page-about .about-partners__list .num {
  font-family: var(--f-num);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.75rem, 5vw, 3rem);
  border: 2px solid var(--ink-4);
  border-left: 6px solid var(--lime);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.76);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 图片响应式 ---------- */
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-about .about-partners__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 2rem;
  }

  .page-about .about-cta__actions {
    justify-content: flex-start;
  }
}

/* ---------- 桌面分屏 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .about-timeline__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }

  .page-about .about-stage {
    padding: 1.9rem 0 0;
    border-left: 0;
    border-top: 2px solid var(--ink-4);
  }

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

  .page-about .about-stage__node {
    top: -9px;
    left: 0;
    box-shadow: 0 0 0 3px var(--ink-2);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
  }

  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .about-cta__actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 15rem;
  }

  .page-about .about-cta__actions .btn {
    text-align: center;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: clamp(4rem, 7vw, 6.4rem);
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-step__icon,
  .page-about .breadcrumb-link {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}