.page-about {
  --ab-line: rgba(14, 42, 51, .14);
  --ab-line-dark: rgba(237, 242, 241, .16);
  --ab-ink-soft: rgba(74, 92, 99, .82);
  --ab-radius: var(--jn-radius);
  background: var(--jn-mist);
}

.page-about .section,
.page-about .ab-hero {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.4rem, 3.4vw, 2.4rem) clamp(2.4rem, 6vw, 4.6rem);
  background:
    radial-gradient(115% 85% at 84% -12%, rgba(30, 90, 107, .88) 0%, rgba(30, 90, 107, 0) 62%),
    linear-gradient(168deg, var(--jn-ink) 0%, var(--jn-night) 78%);
  color: var(--jn-mist);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(114deg, rgba(237, 242, 241, .05) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

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

.page-about .ab-crumb {
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: end;
}

.page-about .ab-hero-kicker {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .2em;
  color: rgba(217, 169, 76, .92);
  border-top: 1px solid var(--jn-gold);
  display: inline-block;
  padding-top: .55rem;
}

.page-about .ab-hero-title {
  margin: .9rem 0 0;
  font-size: clamp(2.15rem, 8.4vw, 5.2rem);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -.02em;
  transform: skewX(-3deg);
  transform-origin: left bottom;
  text-wrap: balance;
  padding-bottom: .06em;
}

.page-about .ab-hero-lead {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 54ch;
  font-size: clamp(.98rem, 2.3vw, 1.08rem);
  line-height: 1.8;
  color: rgba(237, 242, 241, .8);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .ab-hero-figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--ab-line-dark);
  border-radius: var(--ab-radius);
  background: rgba(8, 22, 31, .55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-about .ab-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 2px;
  filter: saturate(.88) contrast(1.04);
}

.page-about .ab-stats {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.2rem) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--ab-line-dark);
  border-radius: var(--ab-radius);
  background: var(--ab-line-dark);
  overflow: hidden;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: clamp(.95rem, 2.4vw, 1.5rem);
  background: rgba(8, 22, 31, .58);
}

.page-about .ab-stat-num {
  font-size: clamp(1.55rem, 4.6vw, 2.35rem);
  font-weight: 700;
  line-height: 1;
  color: var(--jn-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat-label {
  font-size: .79rem;
  line-height: 1.5;
  letter-spacing: .06em;
  color: rgba(237, 242, 241, .7);
}

/* ---------- 章节标题 ---------- */

.page-about .ab-head {
  position: relative;
  border-top: 1px solid var(--ab-line);
  padding-top: clamp(.9rem, 2.2vw, 1.3rem);
}

.page-about .section--dark .ab-head,
.page-about .ab-timeline .ab-head {
  border-top-color: var(--ab-line-dark);
}

.page-about .section-index {
  display: inline-block;
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--jn-gold-deep);
}

.page-about .section--dark .section-index,
.page-about .ab-cta .section-index {
  color: var(--jn-gold);
}

.page-about .section-title {
  margin: .55rem 0 0;
  font-size: clamp(1.6rem, 4.6vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-about .section-lead {
  margin: .85rem 0 0;
  max-width: 58ch;
  font-size: clamp(.95rem, 2.2vw, 1.03rem);
  line-height: 1.8;
}

/* ---------- 01 每天在做的事 ---------- */

.page-about .ab-facts {
  list-style: none;
  margin: clamp(1.7rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
}

.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  border-top: 2px solid var(--jn-teal);
  padding-top: .9rem;
}

.page-about .ab-fact-num {
  display: block;
  font-size: clamp(2rem, 6.6vw, 3.1rem);
  font-weight: 700;
  line-height: .98;
  color: var(--jn-ink);
  letter-spacing: .01em;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-fact-unit {
  font-size: .42em;
  margin-left: .22em;
  letter-spacing: .04em;
  color: var(--jn-teal);
}

.page-about .ab-fact-label {
  font-size: .93rem;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .ab-daily-note {
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .ab-daily-note p {
  margin: 0 0 1em;
  font-size: .97rem;
  line-height: 1.82;
  color: var(--ab-ink-soft);
}

.page-about .ab-daily-actions {
  margin-top: clamp(1rem, 2.6vw, 1.5rem);
}

/* ---------- 02 时间轴 ---------- */

.page-about .ab-timeline {
  background:
    radial-gradient(90% 60% at 12% 0%, rgba(30, 90, 107, .55) 0%, rgba(30, 90, 107, 0) 60%),
    var(--jn-ink);
  color: var(--jn-mist);
}

.page-about .ab-tl {
  list-style: none;
  margin: clamp(1.9rem, 4.6vw, 3rem) 0 0;
  padding: 0;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--jn-gold) 0%, var(--jn-cyan) 58%, rgba(56, 242, 214, .12) 100%);
}

.page-about .ab-tl-item {
  position: relative;
  padding-left: clamp(2.2rem, 6vw, 3.6rem);
  padding-bottom: clamp(1.5rem, 3.8vw, 2.4rem);
}

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

.page-about .ab-tl-dot {
  position: absolute;
  left: 0;
  top: .42rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--jn-ink);
  border: 2px solid var(--jn-gold);
  box-shadow: 0 0 0 4px rgba(217, 169, 76, .14);
}

.page-about .ab-tl-step {
  display: block;
  font-size: .72rem;
  letter-spacing: .2em;
  color: rgba(217, 169, 76, .9);
  margin-bottom: .35rem;
}

.page-about .ab-tl-title {
  margin: 0 0 .45rem;
  font-size: clamp(1.04rem, 2.6vw, 1.3rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--jn-mist);
}

.page-about .ab-tl-text {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(237, 242, 241, .74);
}

.page-about .ab-tl-item--major .ab-tl-body {
  padding: clamp(.9rem, 2.4vw, 1.4rem);
  border: 1px solid var(--ab-line-dark);
  border-radius: var(--ab-radius);
  background: rgba(8, 22, 31, .55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* ---------- 03 团队分工 ---------- */

.page-about .ab-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.5rem);
  margin-top: clamp(1.7rem, 4vw, 2.6rem);
}

.page-about .ab-team-card {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: clamp(1.15rem, 3vw, 1.75rem);
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background: rgba(237, 242, 241, .72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-about .ab-team-num {
  font-size: clamp(2.1rem, 6vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--jn-teal);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-team-num small {
  font-size: .34em;
  margin-left: .3em;
  letter-spacing: .1em;
  color: var(--ab-ink-soft);
}

.page-about .ab-team-title {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--jn-ink);
}

.page-about .ab-team-text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

.page-about .ab-share {
  height: 6px;
  margin-top: auto;
  border-radius: 3px;
  background: rgba(14, 42, 51, .1);
  overflow: hidden;
}

.page-about .ab-share-fill {
  display: block;
  height: 100%;
  border-radius: 3px;
}

.page-about .ab-share-fill--edit {
  width: 37%;
  background: linear-gradient(90deg, var(--jn-teal), var(--jn-gold));
}

.page-about .ab-share-fill--dev {
  width: 44%;
  background: linear-gradient(90deg, var(--jn-ink), var(--jn-teal));
}

.page-about .ab-share-fill--ops {
  width: 19%;
  background: linear-gradient(90deg, var(--jn-gold-deep), var(--jn-gold));
}

.page-about .ab-share-label {
  margin: .5rem 0 0;
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--ab-ink-soft);
}

.page-about .ab-team-more {
  border-top: 1px dashed var(--ab-line);
  padding-top: .7rem;
}

.page-about .ab-team-more summary {
  cursor: pointer;
  list-style: none;
  font-size: .83rem;
  letter-spacing: .05em;
  color: var(--jn-gold-deep);
}

.page-about .ab-team-more summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-team-more summary::before {
  content: "＋ ";
  font-family: var(--jn-mono);
}

.page-about .ab-team-more[open] summary::before {
  content: "－ ";
}

.page-about .ab-team-more p {
  margin: .65rem 0 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

/* ---------- 04 内容覆盖 ---------- */

.page-about .ab-strip {
  display: flex;
  gap: .55rem;
  margin-top: clamp(1.3rem, 3vw, 2rem);
  padding: .2rem .15rem .9rem;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-strip:focus-visible {
  outline: 2px solid var(--jn-gold-deep);
  outline-offset: 4px;
  border-radius: var(--ab-radius);
}

.page-about .ab-strip::-webkit-scrollbar {
  height: 4px;
}

.page-about .ab-strip::-webkit-scrollbar-thumb {
  background: rgba(30, 90, 107, .38);
  border-radius: 2px;
}

.page-about .ab-chip {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: .55rem 1rem;
  border: 1px solid rgba(30, 90, 107, .3);
  border-left: 3px solid var(--jn-gold);
  border-radius: var(--ab-radius);
  background: rgba(237, 242, 241, .9);
  color: var(--jn-ink);
  font-size: .88rem;
  font-weight: 600;
  white-space: nowrap;
}

.page-about .ab-cov-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.7rem);
  margin-top: clamp(1rem, 2.6vw, 1.6rem);
}

.page-about .ab-cov-item {
  border-left: 2px solid var(--jn-teal);
  padding-left: 1rem;
}

.page-about .ab-cov-item h3 {
  margin: 0 0 .45rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--jn-ink);
}

.page-about .ab-cov-item p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-cov-actions {
  margin-top: clamp(1.4rem, 3.4vw, 2rem);
}

/* ---------- 05 合作生态 ---------- */

.page-about .ab-partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .ab-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .ab-partner-list li {
  position: relative;
  padding-left: 1.35rem;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-partner-list strong {
  color: var(--jn-ink);
  font-weight: 800;
}

.page-about .ab-partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jn-gold);
}

.page-about .ab-figure {
  margin: 0;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
  background: var(--jn-paper);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 06 属地与合规 ---------- */

.page-about .ab-base {
  background: linear-gradient(166deg, var(--jn-ink) 0%, var(--jn-night) 82%);
  color: var(--jn-mist);
}

.page-about .ab-base .section-title {
  color: var(--jn-mist);
}

.page-about .ab-base .section-lead {
  color: rgba(237, 242, 241, .78);
}

.page-about .ab-banner {
  position: relative;
  margin: 0 0 clamp(1.5rem, 3.8vw, 2.4rem);
  border: 1px solid var(--ab-line-dark);
  border-radius: var(--ab-radius);
  overflow: hidden;
}

.page-about .ab-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-about .ab-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 22, 31, .12) 0%, rgba(8, 22, 31, .74) 100%);
  pointer-events: none;
}

.page-about .ab-base-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.3rem, 3vw, 2.2rem);
}

.page-about .ab-fact-list {
  margin: 0;
  padding: 0;
}

.page-about .ab-fact-row {
  padding: .85rem 0;
  border-bottom: 1px solid var(--ab-line-dark);
}

.page-about .ab-fact-row:first-child {
  padding-top: 0;
}

.page-about .ab-fact-key {
  display: block;
  margin: 0 0 .35rem;
  font-size: .73rem;
  letter-spacing: .18em;
  color: rgba(237, 242, 241, .55);
}

.page-about .ab-fact-val {
  margin: 0;
  font-size: .98rem;
  line-height: 1.7;
  color: var(--jn-mist);
}

.page-about .ab-contact-card {
  padding: clamp(1.15rem, 3vw, 1.7rem);
  border: 1px solid var(--ab-line-dark);
  border-radius: var(--ab-radius);
  background: rgba(8, 22, 31, .52);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-about .ab-contact-title {
  margin: 0 0 .5rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--jn-mist);
}

.page-about .ab-contact-row {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: .8rem 0;
  border-bottom: 1px solid var(--ab-line-dark);
}

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

.page-about .ab-contact-key {
  font-size: .72rem;
  letter-spacing: .18em;
  color: rgba(237, 242, 241, .55);
}

.page-about .ab-contact-val {
  font-size: .97rem;
  line-height: 1.6;
  color: var(--jn-mist);
  word-break: break-all;
}

.page-about .ab-contact-val a {
  color: var(--jn-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 169, 76, .45);
}

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

.page-about .ab-copy {
  align-self: flex-start;
  margin-top: .2rem;
  padding: .35rem .7rem;
  border: 1px solid rgba(217, 169, 76, .5);
  border-radius: var(--ab-radius);
  background: transparent;
  color: var(--jn-gold);
  font-family: var(--jn-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  cursor: pointer;
}

.page-about .ab-copy:hover {
  background: rgba(217, 169, 76, .14);
}

/* ---------- 收束 ---------- */

.page-about .ab-cta {
  background: var(--jn-paper);
}

.page-about .ab-cta-inner {
  max-width: 62ch;
  border-left: 3px solid var(--jn-gold);
  padding-left: clamp(1rem, 3vw, 1.8rem);
}

.page-about .ab-cta-kicker {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--jn-gold-deep);
}

.page-about .ab-cta-title {
  margin: .7rem 0 0;
  font-size: clamp(1.4rem, 3.8vw, 2.1rem);
  font-weight: 900;
  line-height: 1.25;
  color: var(--jn-ink);
}

.page-about .ab-cta-text {
  margin: .85rem 0 0;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.2rem, 3vw, 1.7rem);
}

/* ---------- 媒体查询 ---------- */

@media (min-width: 600px) {
  .page-about .ab-base-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-hero-figure img {
    aspect-ratio: 4 / 3;
  }

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

  .page-about .ab-partner-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (min-width: 1200px) {
  .page-about .ab-tl {
    padding-right: clamp(0px, 4vw, 60px);
  }

  .page-about .ab-daily-note {
    max-width: 68ch;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .ab-chip {
    transition: border-left-color 200ms var(--jn-ease), background-color 200ms var(--jn-ease);
  }

  .page-about .ab-chip:hover {
    border-left-color: var(--jn-gold-deep);
    background: rgba(244, 239, 228, 1);
  }
}