.page-about {
  --ab-cut: 14px;
  --ab-line: rgba(216, 179, 106, 0.55);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .breadcrumbs {
  padding-block: 18px 8px;
  font-size: 13px;
  color: var(--felt);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.page-about .breadcrumbs__item {
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--gold);
}

.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

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

/* ============ 首屏 ============ */
.page-about .ab-hero {
  display: grid;
  gap: 28px;
  padding-block: clamp(18px, 3vw, 34px) clamp(30px, 5vw, 56px);
  align-items: start;
}

.page-about .ab-hero__eyebrow {
  color: var(--felt);
  letter-spacing: 0.2em;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  transform: skewX(-2deg);
  transform-origin: left bottom;
  max-width: 15em;
}

.page-about .ab-hero__text {
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.8;
  max-width: 34em;
  color: rgba(16, 26, 44, 0.88);
}

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

.page-about .ab-hero__card {
  position: relative;
  background: var(--felt);
  color: var(--paper);
  padding: 26px 22px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  border-top: 3px solid var(--neon);
}

.page-about .ab-hero__flag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--neon);
  margin-bottom: 16px;
}

.page-about .ab-facts {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-facts__row {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(169, 199, 186, 0.35);
}

.page-about .ab-facts__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-facts dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .ab-facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .ab-facts__num {
  font-size: 30px;
  line-height: 1.1;
  color: var(--neon);
  font-weight: 700;
  margin-right: 6px;
}

/* ============ 左右分置骨架 ============ */
.page-about .ab-layout {
  display: grid;
  gap: 22px;
  padding-bottom: clamp(40px, 6vw, 72px);
}

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

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper-dim);
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  background: var(--neon);
  color: var(--ink);
}

.page-about .ab-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--felt);
}

.page-about .ab-index__link:hover .ab-index__no {
  color: var(--ink);
}

.page-about .ab-vert {
  display: none;
}

.page-about .ab-stack {
  min-width: 0;
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
}

/* ============ 画板 ============ */
.page-about .ab-board {
  position: relative;
  background: var(--paper-dim);
  border: 1px solid var(--ab-line);
  padding: clamp(20px, 3.6vw, 40px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .ab-board--ink {
  background: var(--ink);
  color: var(--paper-dim);
  border-color: transparent;
}

.page-about .ab-board--paper {
  background: var(--paper);
  border-color: var(--felt);
}

.page-about .ab-board__head {
  margin-bottom: 20px;
}

.page-about .ab-board__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  padding-left: 14px;
  border-left: 6px solid var(--neon);
  transform: skewX(-2deg);
}

.page-about .ab-board__sub {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(16, 26, 44, 0.72);
}

.page-about .ab-board--ink .ab-board__sub {
  color: var(--mist);
}

/* ============ 来路 ============ */
.page-about .ab-story {
  display: grid;
  gap: 20px;
}

.page-about .ab-story__body p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
}

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

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

.page-about .ab-story__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--gold);
}

.page-about .ab-story__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

/* ============ 团队 ============ */
.page-about .ab-team__tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .ab-team__tab {
  appearance: none;
  border: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  padding: 16px 12px;
  text-align: left;
  cursor: pointer;
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform var(--speed) var(--ease), filter var(--speed) var(--ease);
}

.page-about .ab-team__tab--a { background: var(--mist); }
.page-about .ab-team__tab--b { background: var(--gold); }
.page-about .ab-team__tab--c { background: var(--neon-soft); }
.page-about .ab-team__tab--d { background: var(--amber); }
.page-about .ab-team__tab--e { background: var(--paper); }

.page-about .ab-team__tab:hover,
.page-about .ab-team__tab:focus-visible {
  filter: brightness(1.06);
  transform: translateY(-2px);
}

.page-about .ab-team__tab[aria-selected="true"] {
  background: var(--neon);
  box-shadow: inset 0 0 0 2px var(--ink);
}

.page-about .ab-team__panel {
  background: rgba(246, 235, 216, 0.06);
  padding: 20px;
  border-left: 4px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .ab-team__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--paper);
}

.page-about .ab-team__desc {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .ab-team__points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-about .ab-team__points li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-team__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 2px;
  background: var(--neon);
}

/* ============ 年表 ============ */
.page-about .ab-tl {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .ab-tl__row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  background: var(--paper);
  border-left: 6px solid var(--neon);
  padding: 16px 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform var(--speed) var(--ease);
}

.page-about .ab-tl__row:nth-child(even) {
  border-left-color: var(--violet);
}

.page-about .ab-tl__row:hover {
  transform: translateX(4px);
}

.page-about .ab-tl__year {
  font-size: 22px;
  font-weight: 700;
  color: var(--felt);
  line-height: 1.2;
}

.page-about .ab-tl__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .ab-tl__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(16, 26, 44, 0.8);
}

/* ============ 手艺 ============ */
.page-about .ab-process {
  display: grid;
  gap: 22px;
}

.page-about .ab-process__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: var(--paper-dim);
  border-bottom: 1px solid rgba(11, 92, 70, 0.28);
}

.page-about .ab-step__no {
  font-size: 20px;
  font-weight: 700;
  color: var(--neon);
  line-height: 1.2;
}

.page-about .ab-step__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
}

.page-about .ab-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(16, 26, 44, 0.82);
}

.page-about .ab-process__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--felt);
}

/* ============ 同行与荣誉 ============ */
.page-about .ab-honor {
  overflow: hidden;
}

.page-about .ab-honor__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  pointer-events: none;
}

.page-about .ab-honor__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-partners {
  display: grid;
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .ab-partners__item {
  padding: 16px;
  background: rgba(11, 92, 70, 0.55);
  border: 1px solid var(--ab-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .ab-partners__num {
  display: block;
  font-size: 34px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-about .ab-partners__label {
  display: block;
  margin: 4px 0 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon);
  font-weight: 700;
}

.page-about .ab-partners__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-dim);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .ab-badge {
  position: relative;
  margin: 0;
  padding: 18px 10px 14px;
  text-align: center;
  border: 1px solid var(--gold);
  background: rgba(16, 26, 44, 0.6);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.page-about .ab-badge__ring {
  display: block;
  width: 46px;
  height: 46px;
  margin: 0 auto 10px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  box-shadow: inset 0 0 0 5px rgba(216, 179, 106, 0.18);
}

.page-about .ab-badge__name {
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 900;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .ab-badge__note {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .ab-badge:hover,
.page-about .ab-badge:focus-visible {
  transform: translateY(-4px);
  border-color: var(--neon);
}

.page-about .ab-badge:hover .ab-badge__ring,
.page-about .ab-badge:focus-visible .ab-badge__ring {
  border-color: var(--neon);
  box-shadow: inset 0 0 0 5px rgba(255, 107, 44, 0.25), 0 0 14px rgba(255, 107, 44, 0.45);
}

/* ============ 联络节奏 ============ */
.page-about .ab-rhythm {
  display: grid;
  gap: 22px;
  background: var(--felt);
  color: var(--paper);
}

.page-about .ab-rhythm .ab-board__title {
  color: var(--paper);
}

.page-about .ab-rhythm .ab-board__sub {
  color: var(--mist);
}

.page-about .ab-rhythm__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .ab-rhythm__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-ticket {
  background: var(--ink);
  border: 1px solid var(--ab-line);
  padding: 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .ab-ticket__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--neon);
}

.page-about .ab-ticket__rows {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-ticket__row {
  display: grid;
  grid-template-columns: 5.2em 1fr;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(169, 199, 186, 0.3);
}

.page-about .ab-ticket__row dt {
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .ab-ticket__row dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .ab-ticket__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gold);
}

/* ============ 继续了解 ============ */
.page-about .ab-next {
  display: grid;
  gap: 10px;
}

.page-about .ab-next__link {
  display: grid;
  gap: 3px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper-dim);
  border-left: 5px solid var(--felt);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background var(--speed) var(--ease);
}

.page-about .ab-next__link:hover,
.page-about .ab-next__link:focus-visible {
  background: var(--neon);
  border-left-color: var(--ink);
}

.page-about .ab-next__k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--felt);
  font-weight: 700;
}

.page-about .ab-next__link:hover .ab-next__k {
  color: var(--ink);
}

.page-about .ab-next__t {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-about .ab-team__tabs {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .ab-story {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .ab-rhythm {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 30px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-layout {
    grid-template-columns: 178px minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 52px);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: 104px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
  }

  .page-about .ab-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 10px;
  }

  .page-about .ab-index__link {
    width: 100%;
    padding: 10px 0 10px 0;
    background: transparent;
    border-bottom: 1px solid rgba(11, 92, 70, 0.22);
    clip-path: none;
    font-size: 15px;
    letter-spacing: 0.02em;
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    background: transparent;
    color: var(--neon);
    border-bottom-color: var(--neon);
  }

  .page-about .ab-index__link:hover .ab-index__no,
  .page-about .ab-index__link:focus-visible .ab-index__no {
    color: var(--neon);
  }

  .page-about .ab-vert {
    display: block;
    writing-mode: vertical-rl;
    margin: 4px 0 0;
    font-size: 12px;
    letter-spacing: 0.34em;
    color: var(--felt);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__row,
  .page-about .ab-team__tab,
  .page-about .ab-badge,
  .page-about .ab-next__link {
    transition: none;
  }

  .page-about .ab-tl__row:hover,
  .page-about .ab-badge:hover,
  .page-about .ab-team__tab:hover {
    transform: none;
  }
}