.page-about {
  --about-rail-w: clamp(96px, 11vw, 140px);
  --about-rule: rgba(238, 243, 241, 0.14);
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about h1,
.page-about h2 {
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(32px, 5.6vw, 68px);
}

.page-about h2 {
  font-size: clamp(25px, 3.5vw, 42px);
}

.page-about h3 {
  font-family: var(--font-sans);
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 800;
  line-height: 1.4;
  margin: 0;
}

.page-about p {
  margin: 0 0 1em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.85;
  color: inherit;
}

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

/* ---------- 通用骨架 ---------- */

.page-about .about-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-body > p {
  max-width: 68ch;
}

.page-about .about-body h2 {
  margin-bottom: 22px;
}

.page-about .about-body .about-lead {
  font-size: clamp(16px, 1.2vw, 18px);
  color: #c8d7de;
}

.page-about .about-rail .note-rail {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--aqua);
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(52px, 8vw, 108px);
  background: linear-gradient(155deg, #08131d 0%, #10303f 46%, #0a1723 100%);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(760px, 78%);
  height: min(620px, 90%);
  background: linear-gradient(140deg, rgba(0, 168, 112, 0.46), rgba(31, 217, 196, 0.14) 58%, transparent 82%);
  clip-path: polygon(30% 0, 100% 0, 100% 76%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--green), var(--gold) 38%, var(--orange) 68%, var(--violet));
  z-index: 0;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb li {
  color: var(--grey);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(169, 186, 198, 0.55);
}

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

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

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

.page-about .eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 24px 0 0;
  font-size: clamp(16px, 1.25vw, 19px);
  line-height: 1.8;
  color: #cbd8de;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(22px, 4vw, 56px);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .hero-stats__label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

/* 年份标尺 */

.page-about .year-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 16px 0 0;
  padding: 12px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .year-scale li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  padding-left: 16px;
  font-size: 12px;
  color: var(--grey);
}

.page-about .year-scale li::before {
  content: "";
  position: absolute;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.page-about .year-scale li.is-now::before {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 194, 48, 0.18);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--ink);
}

.page-about .origin-marks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .origin-marks li {
  padding-top: 14px;
  border-top: 2px solid rgba(0, 168, 112, 0.55);
}

.page-about .origin-marks .data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--aqua);
}

.page-about .origin-marks__label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-origin__figure {
  margin: clamp(34px, 5vw, 60px) 0 0;
}

.page-about .about-origin__figure .media-frame {
  border-radius: var(--r-xl);
  overflow: hidden;
}

.page-about .media-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--ink-2);
}

.page-about .role-tree {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: clamp(34px, 4.5vw, 56px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-node {
  position: relative;
  padding: 26px 0 30px;
  border-top: 1px solid var(--about-rule);
  transition: background 0.32s var(--ease);
}

.page-about .role-node__dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: 0 0 0 5px rgba(31, 217, 196, 0.14);
}

.page-about .role-node:nth-child(even) .role-node__dot {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 194, 48, 0.16);
}

.page-about .role-node__desc {
  margin: 12px 0 0;
  color: var(--grey);
}

.page-about .role-node__detail {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(169, 186, 198, 0.86);
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--ink);
}

.page-about .flow-line {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin: clamp(32px, 4.5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 0 0;
  border-top: 2px solid rgba(0, 168, 112, 0.4);
}

.page-about .flow-step__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .flow-step h3 {
  margin-bottom: 10px;
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey);
}

.page-about .flow-foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(36px, 5vw, 64px);
}

.page-about .flow-foot .media-frame {
  border-radius: var(--r-l);
  overflow: hidden;
}

.page-about .flow-foot__note h3 {
  margin-bottom: 14px;
  color: var(--gold-soft);
}

.page-about .flow-foot__note p {
  max-width: 46ch;
  color: var(--grey);
  font-size: 15px;
}

/* ---------- 南昌 ---------- */

.page-about .about-nanchang {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--mist);
  color: var(--ink);
}

.page-about .about-nanchang h2,
.page-about .about-nanchang h3 {
  color: var(--ink);
}

.page-about .about-nanchang p {
  color: #2c3f4b;
}

.page-about .about-nanchang .about-lead {
  color: #16242f;
}

.page-about .about-nanchang .note-rail {
  color: var(--green-deep);
}

.page-about .nanchang-band {
  margin-top: clamp(34px, 4.5vw, 56px);
  padding-top: clamp(26px, 3.5vw, 44px);
  border-top: 2px solid rgba(10, 23, 35, 0.12);
}

.page-about .pavilion-mark {
  display: block;
  width: min(260px, 60%);
  height: auto;
  margin: 0 auto clamp(24px, 3.5vw, 40px);
  color: var(--ink);
  opacity: 0.22;
}

.page-about .nanchang-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .nanchang-notes li {
  padding-left: 18px;
  border-left: 3px solid var(--green);
}

.page-about .nanchang-notes h3 {
  margin-bottom: 8px;
}

.page-about .nanchang-notes p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 赛季演进 ---------- */

.page-about .about-seasons {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--ink-2);
}

.page-about .about-seasons__figure {
  margin: 0 0 clamp(34px, 4.5vw, 58px);
}

.page-about .about-seasons__figure .media-frame {
  border-radius: var(--r-xl);
  overflow: hidden;
}

.page-about .tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 26px;
}

.page-about .tabs .tab-list [role="tab"] {
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
  background: transparent;
  border: 1px solid rgba(238, 243, 241, 0.2);
  border-radius: var(--pill);
  cursor: pointer;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .tabs .tab-list [role="tab"]:hover {
  border-color: var(--aqua);
  color: var(--aqua);
}

.page-about .tabs .tab-list [role="tab"][aria-selected="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
  font-weight: 700;
}

.page-about .tabs .tab-list [role="tab"]:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.page-about .tabs .tab-panel {
  padding-top: 24px;
  border-top: 1px solid var(--about-rule);
}

.page-about .tabs .tab-panel h3 {
  margin-bottom: 14px;
  color: var(--gold-soft);
}

.page-about .tabs .tab-panel p {
  max-width: 62ch;
  color: #c8d7de;
}

.page-about .stage-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 42px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stage-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--grey);
}

.page-about .stage-facts .data-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--aqua);
}

/* ---------- 合作 ---------- */

.page-about .about-partners {
  padding: clamp(52px, 7vw, 100px) 0;
  background: var(--ink);
}

.page-about .partner-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin: clamp(32px, 4vw, 50px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-list li {
  padding: 24px clamp(18px, 2.4vw, 30px) 26px 0;
  border-top: 3px solid var(--orange);
}

.page-about .partner-list li:nth-child(2) {
  border-top-color: var(--violet);
}

.page-about .partner-list__index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--grey);
}

.page-about .partner-list h3 {
  margin-bottom: 12px;
}

.page-about .partner-list p {
  margin: 0;
  font-size: 15px;
  color: var(--grey);
}

.page-about .partner-honor {
  margin: clamp(32px, 4vw, 48px) 0 0;
  padding: 20px 0 0 20px;
  border-left: 4px solid var(--gold);
  border-top: 1px solid var(--about-rule);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gold-soft);
}

/* ---------- 收束 ---------- */

.page-about .about-next {
  padding: clamp(48px, 6.5vw, 92px) 0;
  background: linear-gradient(120deg, #0d2632 0%, #0a1723 68%);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-next h2 {
  max-width: 20ch;
  margin-bottom: 16px;
}

.page-about .about-next p {
  max-width: 52ch;
  color: #c8d7de;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

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

  .page-about .nanchang-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .partner-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(26px, 4vw, 56px);
  }
}

@media (min-width: 860px) {
  .page-about .about-row {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(26px, 4.5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }

  .page-about .about-rail .note-rail {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.3em;
  }

  .page-about .about-hero__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(26px, 4.5vw, 64px);
    align-items: start;
  }

  .page-about .about-hero__rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-hero__rail .note-rail {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.3em;
  }

  .page-about .year-scale {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 16px;
    margin-top: 24px;
    padding: 14px 0 0 14px;
    border-top: 0;
    border-left: 2px solid rgba(238, 243, 241, 0.16);
  }

  .page-about .year-scale li {
    padding-left: 18px;
  }

  .page-about .year-scale li::before {
    left: -6px;
  }

  .page-about .about-origin__figure,
  .page-about .about-seasons__figure {
    margin-left: calc(var(--about-rail-w) + clamp(26px, 4.5vw, 64px));
  }

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

  .page-about .role-tree::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--green), var(--gold) 58%, rgba(238, 243, 241, 0.08));
  }

  .page-about .role-node {
    padding: 34px clamp(16px, 1.8vw, 26px) 32px;
    border-top: 0;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .role-node:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .role-node__dot {
    position: absolute;
    top: -6px;
    left: 0;
    margin: 0;
  }

  .page-about .role-node:first-child .role-node__dot {
    left: 0;
  }

  .page-about .flow-foot {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(30px, 5vw, 72px);
  }
}

@media (min-width: 1024px) {
  .page-about .flow-line {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .flow-step {
    padding: 22px clamp(12px, 1.6vw, 22px) 0 0;
    border-top: 2px solid rgba(0, 168, 112, 0.4);
  }

  .page-about .flow-step + .flow-step {
    padding-left: clamp(14px, 1.6vw, 24px);
  }

  .page-about .flow-step h3 {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}
</φ>