.page-about {
  --ab-rule: rgba(16, 20, 24, 0.14);
  --ab-rule-inv: rgba(246, 243, 236, 0.2);
  --ab-key-w: 150px;
  --ab-key-gap: 24px;
  color: var(--ink);
}

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

/* ---------- 面包屑 ---------- */

.page-about .ab-crumbs-row {
  padding-block: 14px 4px;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(220, 233, 225, 0.85) 0%, rgba(246, 243, 236, 0) 58%),
    var(--warm);
}

.page-about .ab-hero::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(90deg, var(--siren) 0 26%, var(--pitch) 26% 100%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 36px);
  padding-block: clamp(24px, 4.5vw, 50px) clamp(30px, 5vw, 62px);
}

.page-about .ab-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 6.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 10px 0 14px;
  max-width: 19ch;
}

.page-about .ab-hero__lead .lede {
  margin: 0;
  max-width: 34ch;
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-hero__visual {
  margin: 0;
  border-radius: 28px 28px 28px 8px;
  overflow: hidden;
  background: var(--night);
  box-shadow: var(--shadow-card);
}

.page-about .ab-hero__visual img {
  display: block;
  width: 100%;
}

.page-about .ab-hero__visual .media__caption {
  padding: 10px 16px 14px;
  color: rgba(246, 243, 236, 0.72);
}

/* ---------- 章节目录 ---------- */

.page-about .ab-toc {
  position: sticky;
  top: var(--bar-h);
  z-index: 5;
  background: rgba(246, 243, 236, 0.95);
  border-bottom: 1px solid var(--ab-rule);
}

.page-about .ab-toc__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-block: 9px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-about .ab-toc__label {
  flex: none;
  color: var(--cool);
  letter-spacing: 0.14em;
}

.page-about .ab-toc__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  white-space: nowrap;
}

.page-about .ab-toc__list a {
  display: inline-block;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 13px;
  line-height: 1.5;
  color: var(--cool);
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .ab-toc__list a:hover,
.page-about .ab-toc__list a:focus-visible {
  color: var(--night);
  background: var(--paper);
}

.page-about .ab-toc__list a[aria-current="true"] {
  color: var(--night);
  background: var(--mint);
  border-color: rgba(31, 122, 77, 0.35);
}

/* ---------- 区块通用 ---------- */

.page-about .ab-section {
  scroll-margin-top: calc(var(--bar-h) + 62px);
}

.page-about .ab-head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 3.4vw, 34px);
}

.page-about .ab-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 6px 0 10px;
  max-width: 22ch;
}

.page-about .ab-head .lede {
  margin: 0;
  max-width: 40ch;
}

/* 深色区块 */

.page-about .section--night {
  background: var(--night);
  color: var(--warm);
}

.page-about .section--night .section-num {
  color: var(--siren);
}

.page-about .section--night .lede {
  color: rgba(246, 243, 236, 0.76);
}

/* ---------- 时间轴 ---------- */

.page-about .ab-vol {
  display: flex;
  gap: 4px;
  height: 30px;
  margin-bottom: 10px;
}

.page-about .ab-vol__seg {
  border-radius: 4px 4px 10px 4px;
  background: var(--pitch);
  min-width: 12px;
}

.page-about .ab-vol__seg--1 { flex: 12; opacity: 0.42; }
.page-about .ab-vol__seg--2 { flex: 17; opacity: 0.6; }
.page-about .ab-vol__seg--3 { flex: 19; opacity: 0.8; }
.page-about .ab-vol__seg--4 { flex: 14; opacity: 1; }

.page-about .ab-vol__cap {
  margin: 0 0 clamp(18px, 3vw, 28px);
  color: var(--cool);
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-node {
  position: relative;
}

.page-about .ab-node__fold {
  border-top: 1px solid var(--ab-rule);
}

.page-about .ab-node:last-child .ab-node__fold {
  border-bottom: 1px solid var(--ab-rule);
}

.page-about .ab-node__fold > summary {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 16px;
  padding: 18px 0 16px;
  cursor: pointer;
  list-style: none;
  align-items: start;
}

.page-about .ab-node__fold > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__fold > summary::marker {
  content: "";
}

.page-about .ab-node__key {
  grid-column: 1;
  color: var(--pitch);
  font-weight: 700;
}

.page-about .ab-node__title {
  grid-column: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 3.2vw, 23px);
  line-height: 1.25;
  letter-spacing: -0.005em;
}

.page-about .ab-node__mark {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-about .ab-node__mark::before,
.page-about .ab-node__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--pitch);
  transform: translateY(-50%);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-about .ab-node__mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-about .ab-node__fold[open] .ab-node__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-about .ab-node__body {
  padding: 0 0 22px;
  color: var(--ink);
}

.page-about .ab-node__body p {
  margin: 0 0 10px;
  max-width: 62ch;
}

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

/* ---------- 团队分工条带 ---------- */

.page-about .ab-lanes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .ab-lane {
  position: relative;
  padding: 20px 16px 20px;
  background: var(--paper);
  border-radius: 4px 4px var(--r-md) 4px;
  overflow: hidden;
}

.page-about .ab-lane::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: var(--pitch);
}

.page-about .ab-lane:nth-child(1)::before { opacity: 0.38; }
.page-about .ab-lane:nth-child(2)::before { opacity: 0.54; }
.page-about .ab-lane:nth-child(3)::before { opacity: 0.7; }
.page-about .ab-lane:nth-child(4)::before { opacity: 0.86; }
.page-about .ab-lane:nth-child(5)::before { opacity: 1; }

.page-about .ab-lane__idx {
  display: block;
  color: var(--cool);
  margin-bottom: 8px;
}

.page-about .ab-lane__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  margin: 0 0 8px;
}

.page-about .ab-lane__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #2b3238;
}

.page-about .ab-lanes__foot {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 58ch;
}

/* ---------- 生产流程 ---------- */

.page-about .ab-proc {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.6vw, 34px);
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-steps .step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(16, 20, 24, 0.18);
}

.page-about .ab-steps .step:last-child {
  border-bottom: 0;
}

.page-about .ab-steps .step__num {
  flex: none;
  color: var(--pitch);
  font-weight: 700;
  padding-top: 3px;
}

.page-about .ab-steps .step__text {
  display: block;
  max-width: 42ch;
  line-height: 1.72;
}

.page-about .ab-steps .step__text strong {
  color: var(--ink);
}

.page-about .ab-proc__media {
  margin: 0;
  border-radius: 8px 26px 26px 26px;
  overflow: hidden;
  background: var(--night-2);
  box-shadow: var(--shadow-card);
}

.page-about .ab-proc__media img {
  display: block;
  width: 100%;
}

.page-about .ab-proc__media .media__caption {
  padding: 10px 16px 14px;
  color: rgba(246, 243, 236, 0.72);
}

/* ---------- 合作生态 ---------- */

.page-about .ab-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-partner {
  padding: 22px 20px 24px;
  background: var(--night-2);
  border: 1px solid var(--ab-rule-inv);
  border-radius: 6px 24px 24px 24px;
}

.page-about .ab-partner__tag {
  margin: 0 0 10px;
  color: var(--siren);
  letter-spacing: 0.1em;
}

.page-about .ab-partner__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.28;
  margin: 0 0 10px;
  color: var(--warm);
}

.page-about .ab-partner__text {
  margin: 0;
  max-width: 44ch;
  color: rgba(246, 243, 236, 0.78);
  line-height: 1.72;
}

/* ---------- 公众记录 ---------- */

.page-about .ab-record {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 32px);
}

.page-about .ab-awards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-award {
  padding: 18px 18px 20px;
  background: var(--paper);
  border-left: 5px solid var(--siren);
  border-radius: 4px var(--r-md) var(--r-md) 4px;
}

.page-about .ab-award__year {
  margin: 0 0 6px;
  color: var(--cool);
  letter-spacing: 0.14em;
}

.page-about .ab-award__text {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
}

.page-about .ab-award__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #2b3238;
}

.page-about .ab-record__media {
  margin: 0;
  border-radius: 26px 8px 26px 26px;
  overflow: hidden;
  background: var(--night);
  box-shadow: var(--shadow-card);
}

.page-about .ab-record__media img {
  display: block;
  width: 100%;
}

.page-about .ab-record__media .media__caption {
  padding: 10px 16px 14px;
  color: rgba(246, 243, 236, 0.72);
}

/* ---------- 下个赛季 ---------- */

.page-about .section--mint {
  background: var(--mint);
}

.page-about .ab-plan {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .ab-plan__item {
  padding: 16px 18px;
  background: var(--warm);
  border-radius: 4px var(--r-md) var(--r-md) var(--r-md);
}

.page-about .ab-plan__item p {
  margin: 8px 0 0;
  max-width: 46ch;
  line-height: 1.7;
}

.page-about .ab-plan__when {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(31, 122, 77, 0.14);
  color: var(--pitch);
  font-weight: 700;
}

.page-about .ab-next__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 桌面增强 ---------- */

@media (min-width: 700px) {
  .page-about .ab-lanes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .ab-plan {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-node__fold > summary {
    grid-template-columns: var(--ab-key-w) 1fr auto;
    gap: var(--ab-key-gap);
    align-items: baseline;
    padding: 22px 0 16px;
  }

  .page-about .ab-node__key {
    grid-column: 1;
    grid-row: 1;
    position: relative;
    padding-left: 16px;
    padding-top: 2px;
  }

  .page-about .ab-node__key::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--siren);
    box-shadow: 0 0 0 3px rgba(255, 198, 26, 0.22);
  }

  .page-about .ab-node:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 34px;
    bottom: -2px;
    width: 1px;
    background: linear-gradient(180deg, rgba(31, 122, 77, 0.4), rgba(31, 122, 77, 0.08));
    pointer-events: none;
  }

  .page-about .ab-node__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .ab-node__mark {
    grid-column: 3;
    grid-row: 1;
    align-self: center;
  }

  .page-about .ab-node__body {
    padding: 0 0 26px calc(var(--ab-key-w) + var(--ab-key-gap));
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: center;
  }

  .page-about .ab-hero__lead .lede {
    max-width: 36ch;
  }
}

@media (min-width: 960px) {
  .page-about .ab-proc {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 4vw, 54px);
    align-items: start;
  }

  .page-about .ab-record {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: center;
  }

  .page-about .ab-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-lanes {
    display: flex;
    gap: 0;
    background: var(--paper);
    border-radius: var(--r-md);
    overflow: hidden;
  }

  .page-about .ab-lane {
    flex: 1 1 0;
    padding: 22px 18px 26px;
    background: transparent;
    border-radius: 0;
    border-left: 1px solid rgba(16, 20, 24, 0.1);
  }

  .page-about .ab-lane:first-child {
    border-left: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-toc {
    top: 0;
  }
}
<<<END>>>