/* ============================================================
   页面作用域：.page-about 品牌文化
   ============================================================ */

.page-about {
  --about-max: 68ch;
  --about-line: rgba(147, 168, 163, .16);
  --about-line-strong: rgba(47, 243, 214, .32);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 48px;
  background:
    radial-gradient(900px 420px at 82% -12%, rgba(47, 243, 214, .16), transparent 62%),
    radial-gradient(560px 320px at 4% 108%, rgba(255, 122, 47, .10), transparent 68%),
    linear-gradient(180deg, var(--ink-900) 0%, #081a16 62%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(47, 243, 214, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 243, 214, .06) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(760px 460px at 66% 14%, #000 18%, transparent 84%);
  mask-image: radial-gradient(760px 460px at 66% 14%, #000 18%, transparent 84%);
  pointer-events: none;
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-dim);
  margin-bottom: 26px;
}

.page-about .about-hero .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

.page-about .about-hero .breadcrumb span[aria-hidden] {
  color: rgba(147, 168, 163, .5);
  margin: 0 8px;
}

.page-about .about-hero .breadcrumb [aria-current="page"] {
  color: var(--cyan);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about .about-hero__copy .eyebrow {
  margin: 0 0 18px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-about h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 70px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about h1 em {
  font-style: normal;
  color: var(--cyan);
  position: relative;
}

.page-about h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .06em;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(47, 243, 214, 0));
}

.page-about .about-hero__copy .lede {
  max-width: var(--about-max);
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .hero-stat {
  background: var(--surface-1);
  padding: 16px 14px 18px;
  min-width: 0;
}

.page-about .hero-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .hero-stat--signal .hero-stat__num {
  color: var(--orange);
}

.page-about .hero-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-dim);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__visual svg {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, .45));
}

/* ---------- 页面主体骨架 ---------- */
.page-about .about-body {
  background: var(--ink-900);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 48px 0 8px;
}

.page-about .about-index {
  display: none;
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: 0 0 56px;
  scroll-margin-top: 120px;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--about-line);
  padding-top: 48px;
}

.page-about .about-chapter--last {
  padding-bottom: 24px;
  border-bottom: 0;
}

.page-about .about-chapter__head {
  margin-bottom: 22px;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(47, 243, 214, .30);
  margin-bottom: 8px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 5vw, 38px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-chapter__body > p {
  max-width: var(--about-max);
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}

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

.page-about .about-chapter__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-strong);
  transition: border-color 160ms var(--ease);
}

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

/* ---------- 角色卡 ---------- */
.page-about .role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 28px 0;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .role-card {
  position: relative;
  background: var(--ink-800);
  padding: 22px 20px 24px;
  transition: background 180ms var(--ease);
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 243, 214, 0));
  opacity: .55;
}

.page-about .role-card:hover {
  background: #0f2620;
}

.page-about .role-card__who {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .role-card h3 {
  margin: 10px 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .role-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--glass);
}

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

.page-about .about-figure--lead {
  aspect-ratio: 3 / 2;
  margin: 26px 0 34px;
}

.page-about .about-figure--side {
  aspect-ratio: 10 / 7;
}

.page-about .about-figure--wide {
  aspect-ratio: 12 / 7;
  margin: 32px 0 0;
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 17, 15, 0) 45%, rgba(6, 17, 15, .78) 100%);
  pointer-events: none;
}

.page-about .about-figure .figure-frame__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  right: 16px;
  z-index: 2;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text);
}

/* ---------- 赛季时间线 ---------- */
.page-about .season-line {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .season-node {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 22px;
}

.page-about .season-node__scale {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-top: 4px;
}

.page-about .season-node__code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .season-node__dot {
  width: 11px;
  height: 11px;
  margin-top: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 214, .14);
}

.page-about .season-node:not(:last-child) .season-node__scale::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 44px;
  bottom: -2px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 243, 214, .48), rgba(47, 243, 214, .05));
}

.page-about .season-node__content {
  min-width: 0;
  background: var(--surface-1);
  border: 1px solid var(--about-line);
  border-top: 2px solid rgba(47, 243, 214, .42);
  padding: 18px 18px 20px;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease), background 160ms var(--ease);
}

.page-about .season-node__content:hover {
  border-color: var(--about-line-strong);
  border-top-color: var(--cyan);
  background: #0e241f;
  transform: translateY(-2px);
}

.page-about .season-node__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 47, .42);
}

.page-about .season-node__content h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .season-node__content p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .season-node__hover {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin: 0;
  padding-top: 0;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  transition: max-height 240ms var(--ease), opacity 200ms var(--ease), padding-top 240ms var(--ease);
}

.page-about .season-node__content:hover .season-node__hover,
.page-about .season-node__content:focus-within .season-node__hover {
  max-height: 90px;
  opacity: 1;
  padding-top: 12px;
}

/* ---------- 团队流程 ---------- */
.page-about .team-flow {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0 26px;
  padding: 0;
  counter-reset: none;
}

.page-about .team-card {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--cyan);
  background: linear-gradient(158deg, rgba(20, 48, 42, .78), rgba(12, 31, 27, .92));
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

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

.page-about .team-card__step {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .team-card h3 {
  margin: 10px 0 10px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .team-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .team-card__shift {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(147, 168, 163, .22);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--orange);
}

/* ---------- 数据来源图例 ---------- */
.page-about .source-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
  margin: 26px 0 26px;
}

.page-about .source-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .source-card {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--about-line);
}

.page-about .source-card__mark {
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border: 1.5px solid var(--cyan);
  background: rgba(47, 243, 214, .16);
}

.page-about .source-card__mark--orange {
  border-color: var(--orange);
  background: rgba(255, 122, 47, .18);
}

.page-about .source-card__mark--teal {
  border-color: var(--teal);
  background: rgba(18, 163, 143, .2);
}

.page-about .source-card h3 {
  margin: 0 0 7px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .source-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 26px 0 26px;
}

.page-about .eco-card {
  padding: 22px 18px 24px;
  border: 1px solid var(--about-line);
  background: var(--ink-800);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

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

.page-about .eco-card__count {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .eco-card__kicker {
  margin: 10px 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .eco-card h3 {
  margin: 0 0 9px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .eco-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 下一个赛季 ---------- */
.page-about .next-band {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 8px;
  padding: 28px 22px 30px;
  border: 1px solid var(--about-line-strong);
  background:
    radial-gradient(520px 260px at 100% 0%, rgba(47, 243, 214, .14), transparent 68%),
    linear-gradient(150deg, rgba(20, 48, 42, .9), rgba(6, 17, 15, .96));
}

.page-about .next-band::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(255, 122, 47, .8), rgba(47, 243, 214, 0));
}

.page-about .next-band__copy p {
  max-width: var(--about-max);
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

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

.page-about .next-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 36px 0 60px;
  }

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

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

  .page-about .season-node {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 20px;
    padding-bottom: 28px;
  }

  .page-about .season-node__content {
    padding: 22px 22px 24px;
  }

  .page-about .next-band {
    padding: 34px 30px 36px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 44px 0 76px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 52px;
  }

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

  .page-about .about-hero__visual {
    padding-top: 18px;
  }

  .page-about .source-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 36px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 56px;
    padding-top: 64px;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: 116px;
    align-self: start;
    padding-left: 16px;
    border-left: 1px solid var(--about-line);
  }

  .page-about .about-index__title {
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--text-dim);
  }

  .page-about .about-index__link {
    display: block;
    padding: 9px 0;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-dim);
    text-decoration: none;
    border-bottom: 1px solid rgba(147, 168, 163, .07);
    transition: color 160ms var(--ease), padding-left 160ms var(--ease);
  }

  .page-about .about-index__link:last-child {
    border-bottom: 0;
  }

  .page-about .about-index__link:hover {
    color: var(--white);
    padding-left: 4px;
  }

  .page-about .about-index__link.is-active {
    color: var(--cyan);
    padding-left: 4px;
  }

  .page-about .about-index__num {
    display: block;
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
    font-size: 10.5px;
    letter-spacing: .14em;
    color: rgba(47, 243, 214, .5);
    margin-bottom: 2px;
  }

  .page-about .about-chapter {
    padding-bottom: 76px;
  }

  .page-about .about-chapter + .about-chapter {
    padding-top: 64px;
  }

  .page-about .about-chapter__num {
    font-size: 60px;
  }
}

@media (min-width: 1180px) {
  .page-about .team-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

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

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

  .page-about .next-band__actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 176px;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 379px) {
  .page-about .hero-stats {
    grid-template-columns: 1fr;
  }

  .page-about .season-node {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 10px;
  }
}
<<<END>>>