/* ===== 品牌故事 /story/ ===== */
.page-about {
  --ab-rail-gap: 1.1rem;
  --ab-rail-year: 4.6rem;
  --ab-rail-ver: 3.6rem;
  --ab-edge: rgba(53, 240, 206, 0.16);
  background: var(--c-ink);
  color: var(--c-text);
  overflow-x: clip;
}

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(1.4rem, 3vw, 2.2rem) clamp(3rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(53, 240, 206, 0.055) 47px 48px),
    radial-gradient(120% 92% at 88% -12%, rgba(53, 240, 206, 0.14), transparent 58%);
}

.page-about .about-hero__cut {
  position: absolute;
  right: -6%;
  bottom: 0;
  z-index: -1;
  width: min(66%, 780px);
  height: clamp(104px, 19vw, 236px);
  background: var(--c-ink-2);
  clip-path: polygon(24% 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero__slash {
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: clamp(112px, 20vw, 248px);
  z-index: -1;
  height: 1px;
  opacity: 0.6;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--c-cyan) 26%, var(--c-cyan) 64%, transparent);
  transform: rotate(-2.4deg);
}

.page-about .about-hero__body {
  max-width: 46rem;
  margin-top: clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-hero__body .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--c-orange);
  text-transform: none;
}

.page-about .about-hero__mark {
  color: var(--c-cyan);
  position: relative;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08em;
  height: 2px;
  background: var(--c-cyan);
  opacity: 0.4;
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin-top: clamp(1.2rem, 2.6vw, 1.8rem);
  color: var(--c-text);
  opacity: 0.84;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(2.4rem, 6vw, 4rem) 0 0;
  padding: 0;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-stat {
  margin: 0;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--c-ink);
}

.page-about .about-stat .data-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-about .about-stat .data-value {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.4vw, 2.35rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-about .about-stat--on .data-value {
  color: var(--c-cyan);
}

/* ---------- 页内锚点 ---------- */
.page-about .about-jump {
  background: var(--c-ink-2);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-jump__track {
  display: flex;
  gap: 0.5rem;
  padding-block: 0.8rem;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-jump__track a {
  flex: 0 0 auto;
  padding: 0.32rem 0.9rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-jump__track a:hover,
.page-about .about-jump__track a:focus-visible {
  color: var(--c-ink-text);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-section--deep {
  background: var(--c-ink-2);
}

.page-about .about-head {
  display: grid;
  gap: 1.1rem;
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-head__index {
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--c-orange);
}

.page-about .about-head h2 {
  margin: 0;
}

.page-about .about-head__note {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-timeline__item {
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-timeline__item--now {
  background: linear-gradient(90deg, rgba(53, 240, 206, 0.07), transparent 62%);
}

.page-about .about-node > summary {
  list-style: none;
}

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

.page-about .about-node__head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  padding: 1.15rem 2.4rem 1.15rem 0;
  cursor: pointer;
  transition: color 160ms var(--ease);
}

.page-about .about-node__head:hover .about-node__title {
  color: var(--c-cyan);
}

.page-about .about-node__year {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

.page-about .about-node__ver {
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

.page-about .about-node__title {
  flex: 1 1 100%;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.6vw, 1.45rem);
  letter-spacing: -0.01em;
  color: var(--c-text);
  transition: color 160ms var(--ease);
}

.page-about .about-node__toggle {
  position: absolute;
  right: 0;
  top: 1.15rem;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid var(--line-mid);
  display: grid;
  place-items: center;
}

.page-about .about-node__toggle::before,
.page-about .about-node__toggle::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-about .about-node__toggle::before {
  width: 8px;
  height: 1px;
}

.page-about .about-node__toggle::after {
  width: 1px;
  height: 8px;
  transition: transform 200ms var(--ease);
}

.page-about .about-node[open] .about-node__toggle::after {
  transform: scaleY(0);
}

.page-about .about-node__body {
  max-width: 44em;
  padding: 0 0 1.35rem;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ---------- 暖纸横向带 ---------- */
.page-about .about-band {
  background: var(--c-paper);
  color: var(--c-ink-text);
}

.page-about .about-band__media {
  margin: 0;
  border: 0;
}

.page-about .about-band__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.38) contrast(1.06) brightness(0.82);
}

.page-about .about-band__text {
  padding-block: clamp(1.8rem, 4.5vw, 3rem) clamp(2.2rem, 5vw, 3.4rem);
}

.page-about .about-band__quote {
  margin: 0;
  max-width: 32em;
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 3vw, 1.9rem);
  line-height: 1.58;
  color: var(--c-ink-text);
}

.page-about .about-band__meta {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: rgba(10, 31, 26, 0.62);
}

/* ---------- 团队 ---------- */
.page-about .about-team__split {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-team__cards {
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-role {
  position: relative;
  background: var(--c-ink);
  padding: 1.3rem 1.25rem 1.45rem;
  border-left: 2px solid transparent;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  transform: translateY(-2px);
  border-left-color: var(--c-cyan);
  outline: none;
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-about .about-role__count {
  margin: 0.3rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

.page-about .about-role__desc {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-about .about-role__list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0.8rem 0 0;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-role__list li {
  position: relative;
  padding-left: 0.95rem;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-role__list li + li {
  margin-top: 0.3rem;
}

.page-about .about-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 5px;
  height: 1px;
  background: var(--c-cyan);
}

.page-about .about-team__photo {
  margin: 0;
}

.page-about .about-team__photo img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.4) contrast(1.05) brightness(0.86);
}

.page-about .about-team__photo .media-frame__caption {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--c-muted);
}

/* ---------- 整理方式 ---------- */
.page-about .about-method {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-method__media {
  margin: 0;
}

.page-about .about-method__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.36) contrast(1.06) brightness(0.84);
}

.page-about .about-method__media .media-frame__caption {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--c-muted);
}

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  column-gap: 0.9rem;
  padding: 1.1rem 0 1.2rem;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-step__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

.page-about .about-step__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-about .about-step p {
  margin: 0.45rem 0 0;
  font-size: 0.94rem;
  line-height: 1.74;
  color: var(--c-muted);
}

.page-about .about-method__foot {
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-mid);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .about-method__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 谁在用 ---------- */
.page-about .about-audience {
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-audience__item {
  background: var(--c-ink);
  padding: 1.5rem 1.3rem 1.7rem;
}

.page-about .about-audience__tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-about .about-audience__name {
  margin: 0.85rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-about .about-audience__item p {
  margin: 0.7rem 0 0;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--c-muted);
}

/* ---------- 长期承诺 ---------- */
.page-about .about-promises {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-promise {
  background: var(--c-ink-2);
  padding: 1.5rem 1.3rem 1.7rem;
}

.page-about .about-promise__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .about-promise__name {
  margin: 0.7rem 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  line-height: 1.45;
  color: var(--c-text);
}

.page-about .about-promise p {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  padding-block: clamp(3.2rem, 8vw, 6rem);
  background:
    linear-gradient(180deg, rgba(16, 48, 42, 0.9), var(--c-ink) 78%),
    var(--c-ink);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-cta__inner {
  max-width: 54rem;
}

.page-about .about-cta .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-about .about-cta h2 {
  margin: 0.9rem 0 0;
}

.page-about .about-cta__lede {
  margin: 1.1rem 0 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.8rem 0 0;
}

.page-about .about-cta__foot {
  margin: 1.4rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--c-muted);
}

.page-about .about-cta__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-head {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 2rem;
    align-items: end;
  }

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

@media (min-width: 760px) {
  .page-about .about-node__head {
    flex-wrap: nowrap;
    align-items: center;
    gap: 1.1rem;
    padding-block: 1.35rem;
  }

  .page-about .about-node__year {
    flex: 0 0 var(--ab-rail-year);
  }

  .page-about .about-node__ver {
    flex: 0 0 var(--ab-rail-ver);
    text-align: center;
  }

  .page-about .about-node__title {
    flex: 1 1 auto;
  }

  .page-about .about-node__toggle {
    top: 50%;
    transform: translateY(-50%);
  }

  .page-about .about-node__body {
    padding-left: calc(var(--ab-rail-year) + var(--ab-rail-ver) + var(--ab-rail-gap) * 2);
    padding-bottom: 1.5rem;
  }

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

@media (min-width: 1000px) {
  .page-about .about-team__split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-method {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

  .page-about .about-audience__item:nth-child(3) {
    grid-column: auto;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-node__toggle::after,
  .page-about .about-jump__track a,
  .page-about .about-node__title {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-role:focus-visible {
    transform: none;
  }
}