/* ===== 品牌档案页 · page-about ===== */

.page-about {
  --ab-shell-pad: 18px;
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
}

.page-about .ab-crumbs {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 32px 0 46px;
  border-bottom: var(--line-w) solid var(--felt);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -70%;
  width: 130%;
  height: 180%;
  background: linear-gradient(155deg, var(--felt) 0%, var(--ink-2) 52%, var(--ink) 100%);
  transform: rotate(-9deg);
  z-index: -1;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -46px;
  width: 62%;
  height: 92px;
  background: var(--gold);
  opacity: 0.1;
  transform: rotate(-4deg);
  z-index: -1;
}

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

.page-about .ab-h1 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 8.4vw, 3.9rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.035em;
  max-width: 15ch;
}

.page-about .ab-h1__mark {
  color: var(--gold);
}

.page-about .ab-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.82;
  color: rgba(244, 240, 230, 0.82);
}

.page-about .ab-hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  background: rgba(212, 169, 74, 0.3);
  border: var(--line-w) solid rgba(212, 169, 74, 0.38);
}

.page-about .ab-hero__meta-cell {
  background: rgba(11, 43, 34, 0.9);
  padding: 14px 16px;
}

.page-about .ab-hero__meta dt {
  margin: 0 0 6px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-about .ab-hero__meta dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--brass);
  letter-spacing: -0.01em;
}

/* ---------- 通用区块 ---------- */

.page-about .ab-section {
  position: relative;
  padding: 52px 0;
}

.page-about .ab-section--felt {
  background: var(--ink-2);
  border-top: var(--line-w) solid var(--felt);
  border-bottom: var(--line-w) solid var(--felt);
}

.page-about .ab-section--felt::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(212, 169, 74, 0.05) 0 2px,
    transparent 2px 12px
  );
  pointer-events: none;
}

.page-about .ab-section--felt > .sk-shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-section__head {
  max-width: 60ch;
  margin: 0 0 30px;
}

.page-about .ab-section__head .sk-h2 {
  margin: 10px 0 0;
  font-size: clamp(1.55rem, 5.4vw, 2.55rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.page-about .ab-section__sub {
  margin: 14px 0 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.74);
}

.page-about .sk-figure {
  margin: 0;
  border: var(--line-w) solid var(--felt);
  box-shadow: var(--shadow-mid);
  background: var(--black);
}

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

.page-about .sk-figure__cap {
  display: block;
  padding: 10px 14px;
  background: rgba(11, 43, 34, 0.94);
  border-top: var(--line-w) solid var(--felt);
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(244, 240, 230, 0.66);
}

/* ---------- 时间轴 ---------- */

.page-about .ab-timeline__figure {
  margin-bottom: 34px;
}

.page-about .ab-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 0 56px;
}

.page-about .ab-timeline__list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 12px;
  bottom: 12px;
  width: var(--line-w);
  background: linear-gradient(
    180deg,
    var(--gold) 0%,
    var(--felt) 55%,
    rgba(28, 90, 67, 0.18) 100%
  );
}

.page-about .ab-tl-item {
  position: relative;
  margin-bottom: 20px;
}

.page-about .ab-tl-item:last-child {
  margin-bottom: 0;
}

.page-about .ab-tl-badge {
  position: absolute;
  left: -48px;
  top: 16px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--gold);
  clip-path: polygon(30% 0, 70% 0, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0 70%, 0 30%);
  transition: background-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .ab-tl-card {
  background: var(--ink-2);
  border: var(--line-w) solid var(--felt);
  border-left: 4px solid var(--felt);
  padding: 16px 18px 18px;
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease),
    box-shadow 0.28s var(--ease);
}

.page-about .ab-tl-card:hover {
  border-color: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-tl-item:hover .ab-tl-badge {
  background: var(--brass);
  transform: rotate(-8deg) scale(1.1);
}

.page-about .ab-tl-year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .ab-tl-title {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .ab-tl-text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(244, 240, 230, 0.74);
}

/* ---------- 归档四样 ---------- */

.page-about .ab-arc {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.page-about .ab-arc .sk-path__item {
  background: var(--ink);
  border: var(--line-w) solid var(--felt);
  border-top: 4px solid var(--gold);
  padding: 18px 18px 20px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.page-about .ab-arc .sk-path__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-arc .sk-path__title {
  margin: 0 0 10px;
  font-size: 1.04rem;
  font-weight: 800;
  color: var(--brass);
}

.page-about .ab-arc__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-about .ab-arc .sk-path__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.76;
  color: rgba(244, 240, 230, 0.74);
}

.page-about .ab-aside {
  margin: 0 0 30px;
  padding: 16px 18px;
  background: rgba(166, 94, 68, 0.13);
  border-left: 4px solid var(--clay);
}

.page-about .ab-aside p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.8);
}

.page-about .ab-aside .sk-kicker {
  margin-bottom: 10px;
}

.page-about .ab-aside a {
  color: var(--brass);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 169, 74, 0.5);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .ab-archive__figure {
  margin-bottom: 24px;
}

/* ---------- 折叠面板 ---------- */

.page-about .ab-fold {
  border: var(--line-w) dashed rgba(212, 169, 74, 0.45);
  background: rgba(11, 43, 34, 0.6);
}

.page-about .ab-fold__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--brass);
}

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

.page-about .ab-fold__sum::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--gold);
  transition: transform 0.25s var(--ease);
}

.page-about .ab-fold[open] .ab-fold__sum::before {
  transform: rotate(45deg);
}

.page-about .ab-fold__body {
  padding: 0 18px 18px;
  border-top: 1px solid rgba(212, 169, 74, 0.22);
}

.page-about .ab-fold__list {
  margin: 16px 0 0;
  padding-left: 1.15em;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.78);
}

.page-about .ab-fold__list li {
  margin-bottom: 8px;
}

.page-about .ab-fold__list li:last-child {
  margin-bottom: 0;
}

.page-about .ab-fold__list li::marker {
  color: var(--gold);
}

/* ---------- 运营覆盖 ---------- */

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

.page-about .ab-cov-card {
  position: relative;
  overflow: hidden;
  padding: 22px 20px;
  background: var(--felt);
  border: var(--line-w) solid rgba(212, 169, 74, 0.4);
  box-shadow: var(--shadow-mid);
}

.page-about .ab-cov-card::after {
  content: "";
  position: absolute;
  top: -34px;
  right: -34px;
  width: 84px;
  height: 84px;
  background: rgba(212, 169, 74, 0.15);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .ab-cov-num {
  position: relative;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.72rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--brass);
  letter-spacing: -0.02em;
}

.page-about .ab-cov-label {
  position: relative;
  margin: 8px 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  font-weight: 800;
}

.page-about .ab-cov-text {
  position: relative;
  margin: 12px 0 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: rgba(244, 240, 230, 0.82);
}

.page-about .ab-cov-card--wide {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  background: var(--ink);
  border-color: var(--gold);
}

.page-about .ab-cov-icp {
  display: inline-block;
  padding: 6px 12px;
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  color: var(--gold);
  border: 1px solid rgba(212, 169, 74, 0.55);
}

.page-about .ab-cov-icp-note {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(244, 240, 230, 0.78);
}

/* ---------- 团队 ---------- */

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

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

.page-about .ab-team-role {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 0 16px;
  align-items: baseline;
  padding: 16px 18px;
  background: var(--ink);
  border-left: 4px solid var(--gold);
}

.page-about .ab-team-role__count {
  font-family: var(--font-mono);
  font-size: 1.72rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .ab-team-role__count small {
  margin-left: 3px;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--rock);
}

.page-about .ab-team-role__name {
  display: block;
  margin-bottom: 5px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--cream);
}

.page-about .ab-team-role__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(244, 240, 230, 0.72);
}

.page-about .ab-team__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(244, 240, 230, 0.76);
  background: rgba(11, 43, 34, 0.62);
  border: 1px solid rgba(212, 169, 74, 0.28);
}

.page-about .ab-team__note a {
  color: var(--brass);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 169, 74, 0.45);
}

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

.page-about .ab-team__figure {
  margin: 0;
}

/* ---------- 合作与节奏 ---------- */

.page-about .ab-partner__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-partner__item {
  position: relative;
  padding: 18px 20px 18px 54px;
  background: var(--ink-2);
  border: var(--line-w) solid var(--felt);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.page-about .ab-partner__item:hover {
  border-color: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-partner__item::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 26px;
  width: 12px;
  height: 12px;
  background: var(--gold);
  transform: rotate(45deg);
  transition: background-color 0.25s var(--ease);
}

.page-about .ab-partner__item:hover::before {
  background: var(--brass);
}

.page-about .ab-partner__title {
  margin: 0 0 8px;
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .ab-partner__text {
  margin: 0;
  max-width: 64ch;
  font-size: 0.93rem;
  line-height: 1.78;
  color: rgba(244, 240, 230, 0.74);
}

/* ---------- 收尾 ---------- */

.page-about .ab-cta {
  padding: 52px 0 60px;
  border-top: var(--line-w) solid var(--felt);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .ab-cta__title {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(1.45rem, 5vw, 2.2rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.025em;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-about .ab-cta__note {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--rock);
}

.page-about .ab-cta__note a {
  color: var(--brass);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 169, 74, 0.45);
}

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

/* ---------- 断点 ---------- */

@media (max-width: 480px) {
  .page-about .ab-timeline__list {
    padding-left: 44px;
  }

  .page-about .ab-timeline__list::before {
    left: 15px;
  }

  .page-about .ab-tl-badge {
    left: -41px;
    width: 24px;
    height: 24px;
    font-size: 0.6rem;
  }

  .page-about .ab-team-role {
    grid-template-columns: 60px 1fr;
    gap: 0 12px;
  }

  .page-about .ab-team-role__count {
    font-size: 1.42rem;
  }
}

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

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

@media (min-width: 860px) {
  .page-about .ab-hero {
    padding: 66px 0 78px;
  }

  .page-about .ab-hero::before {
    right: -34%;
    width: 96%;
  }

  .page-about .ab-section {
    padding: 74px 0;
  }

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

  .page-about .ab-cov-card--wide {
    grid-column: 1 / -1;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .ab-cta {
    padding: 70px 0 78px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-timeline__figure {
    margin-bottom: 44px;
  }

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

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