.page-about {
  --about-line: rgba(232, 180, 74, .18);
  --about-soft: rgba(244, 235, 220, .78);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
}

@media (min-width: 1024px) {
  .page-about {
    padding-left: var(--rail-w);
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(56px, 11vw, 132px) 0 clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__figure {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .42;
  filter: saturate(.7);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 26, 51, .5) 0%, rgba(16, 26, 51, .84) 60%, var(--ink) 100%);
}

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

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

.page-about .crumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .crumb a:hover {
  color: var(--gold);
}

.page-about .crumb__current {
  color: var(--paper);
}

.page-about .about-hero__kicker {
  margin: clamp(26px, 5vw, 48px) 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 9vw, 104px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__title span {
  display: block;
}

.page-about .about-hero__lead {
  max-width: 42ch;
  margin: 0 0 clamp(22px, 4vw, 34px);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-hero__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
  padding-left: 14px;
  border-left: 2px solid var(--teal);
}

/* ---------- 章节索引带 ---------- */
.page-about .about-band {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
  scrollbar-width: none;
}

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

.page-about .about-band .index-band__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--about-soft);
  transition: color .25s ease, background .25s ease, border-color .25s ease;
}

.page-about .about-band .index-band__link:hover,
.page-about .about-band .index-band__link:focus-visible {
  color: var(--ink-deep);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-band .index-band__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  opacity: .65;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding-block: clamp(44px, 8vw, 92px);
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }
}

.page-about .about-index {
  display: none;
}

@media (min-width: 900px) {
  .page-about .about-index {
    display: block;
    position: sticky;
    top: 32px;
    align-self: start;
  }
}

.page-about .about-index__title {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 0 7px 10px;
  border-left: 2px solid transparent;
  font-size: 13px;
  text-decoration: none;
  color: rgba(244, 235, 220, .6);
  transition: color .25s ease, border-color .25s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--gold);
  border-left-color: var(--gold);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
  opacity: .75;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  scroll-margin-top: 84px;
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(40px, 7vw, 80px);
  padding-top: clamp(28px, 5vw, 48px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-sec__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .about-sec__eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .6;
}

.page-about .about-sec__title {
  max-width: 20ch;
  margin: 0 0 clamp(16px, 3vw, 26px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.2vw, 46px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-sec > p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-soft);
}

/* ---------- 引文块 ---------- */
.page-about .about-quote {
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 28px);
  background: var(--paper);
  border: 1px solid var(--yak);
  border-left-width: 4px;
  border-radius: 4px var(--radius) var(--radius) 4px;
}

.page-about .about-quote blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--paper-ink);
}

.page-about .about-quote figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(107, 75, 54, .95);
}

/* ---------- 暖纸内容层 ---------- */
.page-about .about-panel {
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 40px);
  box-shadow: 0 24px 56px rgba(7, 13, 26, .38);
}

.page-about .about-panel p {
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(27, 34, 51, .82);
  margin: 0;
}

/* ---------- 三件事 ---------- */
.page-about .about-tri {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

@media (min-width: 760px) {
  .page-about .about-tri {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-tri__item {
  border-top: 3px solid var(--yak);
  padding-top: 16px;
}

.page-about .about-tri__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--maroon);
}

.page-about .about-tri__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.35;
  color: var(--paper-ink);
}

.page-about .about-tri__item p {
  margin: 0 0 10px;
}

.page-about .about-tri__item .about-tri__fact {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--teal);
  padding-top: 10px;
  border-top: 1px dashed rgba(27, 34, 51, .18);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

@media (min-width: 860px) {
  .page-about .about-tl {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .about-tl__list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--teal) 52%, var(--crimson) 100%);
  opacity: .6;
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__dot {
  position: absolute;
  left: -30px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--gold);
  box-sizing: border-box;
  transition: background .25s ease, box-shadow .25s ease;
}

.page-about .about-tl__item:hover .about-tl__dot {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(232, 180, 74, .16);
}

.page-about .about-tl__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--teal);
}

.page-about .about-tl__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-tl__item p {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(244, 235, 220, .72);
}

.page-about .about-tl__item--now .about-tl__year {
  color: var(--gold);
}

.page-about .about-tl__item--now .about-tl__dot {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 180, 74, .18);
}

.page-about .about-tl__figure {
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-deep);
}

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

.page-about .about-tl__cap {
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--mist);
  border-top: 1px solid var(--about-line);
}

/* ---------- 团队六边形 ---------- */
.page-about .about-hex {
  display: grid;
  gap: clamp(22px, 3.4vw, 30px);
  margin-bottom: clamp(20px, 3vw, 28px);
}

@media (min-width: 700px) {
  .page-about .about-hex {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-hex__cell {
  text-align: center;
}

.page-about .about-hex__shape {
  width: min(148px, 60%);
  margin: 0 auto 14px;
  aspect-ratio: 1 / 1.06;
  clip-path: polygon(50% 0%, 100% 26%, 100% 74%, 50% 100%, 0% 74%, 0% 26%);
  background: linear-gradient(160deg, var(--ink) 0%, var(--ink-deep) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.page-about .about-hex__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-hex__unit {
  font-size: 10.5px;
  letter-spacing: .24em;
  color: var(--mist);
}

.page-about .about-hex__cell h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper-ink);
}

.page-about .about-hex__cell p {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(27, 34, 51, .78);
}

.page-about .about-team__note {
  padding-top: 16px;
  border-top: 1px solid rgba(27, 34, 51, .16);
  font-size: 13.5px !important;
  line-height: 1.8 !important;
  color: rgba(107, 75, 54, .95) !important;
}

/* ---------- 配色样本 ---------- */
.page-about .about-swatch {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
}

.page-about .about-swatch li {
  padding: 12px;
  border: 1px solid var(--about-line);
  border-radius: 10px;
  background: rgba(244, 235, 220, .04);
}

.page-about .about-swatch__chip {
  display: block;
  height: 42px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.page-about .about-swatch__chip--ink {
  background: var(--ink);
  border: 1px solid rgba(244, 235, 220, .2);
}

.page-about .about-swatch__chip--gold {
  background: var(--gold);
}

.page-about .about-swatch__chip--teal {
  background: var(--teal);
}

.page-about .about-swatch__chip--crimson {
  background: var(--crimson);
}

.page-about .about-swatch__chip--maroon {
  background: var(--maroon);
}

.page-about .about-swatch__name {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-swatch__use {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-reach {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  margin-bottom: clamp(18px, 3vw, 26px);
}

@media (min-width: 820px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    align-items: center;
  }
}

.page-about .about-reach__stats {
  display: grid;
  gap: 16px;
}

@media (min-width: 520px) {
  .page-about .about-reach__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-metric {
  padding-left: 12px;
  border-left: 3px solid var(--teal);
}

.page-about .about-metric--gold {
  border-left-color: var(--gold);
}

.page-about .about-metric--crimson {
  border-left-color: var(--crimson);
}

.page-about .about-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper-ink);
}

.page-about .about-metric__unit {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(27, 34, 51, .7);
}

.page-about .about-reach__figure {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
}

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

/* ---------- 收尾句 ---------- */
.page-about .about-close__text {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 25px);
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 30ch;
}

/* ---------- 延伸导航 ---------- */
.page-about .about-more {
  display: grid;
  gap: 1px;
  margin-bottom: clamp(40px, 7vw, 80px);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

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

.page-about .about-more__link {
  display: block;
  padding: 20px 18px;
  border-left: 1px solid var(--about-line);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--paper);
  transition: background .25s ease, color .25s ease;
}

.page-about .about-more__link:hover,
.page-about .about-more__link:focus-visible {
  background: rgba(232, 180, 74, .1);
  color: var(--gold);
}

.page-about .about-more__link em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-band .index-band__link,
  .page-about .about-index__list a,
  .page-about .about-tl__dot,
  .page-about .about-more__link {
    transition: none;
  }
}