.page-about {
  --about-rule: rgba(201,162,75,.22);
  --about-rule-cool: rgba(127,200,184,.2);
  background: var(--ky-night);
  color: var(--ky-paper);
  font-family: var(--ky-sans);
  overflow-x: hidden;
}

.page-about .about-topbar {
  padding-top: clamp(1rem, 3vw, 1.8rem);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--ky-serif);
  letter-spacing: .02em;
  color: var(--ky-paper);
}

.page-about h1 {
  margin: .7rem 0 0;
  font-size: clamp(1.95rem, 6.4vw, 3.5rem);
  line-height: 1.26;
  font-weight: 700;
}

.page-about h2 {
  margin: .5rem 0 0;
  font-size: clamp(1.45rem, 4vw, 2.15rem);
  line-height: 1.35;
}

.page-about h3 {
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  line-height: 1.45;
}

.page-about .about-prose {
  max-width: 68ch;
  color: var(--ky-paper);
  line-height: 1.85;
  font-size: 1rem;
}

.page-about .about-prose p + p {
  margin-top: 1rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.6rem, 5vw, 3.6rem) clamp(2rem, 6vw, 4.2rem);
  background:
    radial-gradient(circle at 84% 14%, rgba(127,200,184,.10), transparent 58%),
    radial-gradient(circle at 8% 88%, rgba(201,162,75,.09), transparent 55%);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.8rem, 4vw, 2.6rem);
  align-items: end;
}

.page-about .about-hero__accent {
  color: var(--ky-gold);
  display: inline-block;
  border-bottom: 2px solid rgba(201,162,75,.45);
  padding-bottom: .06em;
}

.page-about .about-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(243,231,211,.88);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.6rem;
}

.page-about .about-hero__board {
  border: 1px solid var(--about-rule);
  background: linear-gradient(158deg, rgba(43,26,18,.92), rgba(26,17,12,.78));
  box-shadow: 0 18px 48px rgba(0,0,0,.32);
}

.page-about .about-board__caption {
  margin: 0;
  padding: .85rem 1rem;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--ky-coord);
  border-bottom: 1px solid var(--about-rule);
}

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

.page-about .about-stat {
  padding: 1rem .95rem 1.1rem;
  border-right: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-stat:nth-child(even) {
  border-right: 0;
}

.page-about .about-stat:nth-child(n+3) {
  border-bottom: 0;
}

.page-about .about-stat dt {
  font-family: var(--ky-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--ky-gray);
}

.page-about .about-stat dd {
  margin: .45rem 0 0;
  font-family: var(--ky-serif);
  font-size: clamp(1.5rem, 5vw, 1.95rem);
  font-weight: 700;
  color: var(--ky-gold);
  line-height: 1.1;
}

.page-about .about-stat__unit {
  font-family: var(--ky-sans);
  font-size: .72rem;
  font-weight: 400;
  color: var(--ky-gray);
  margin-left: .25rem;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  padding-block: clamp(1.4rem, 4vw, 2.8rem) clamp(1rem, 3vw, 2rem);
}

.page-about .about-index {
  margin-bottom: 1.4rem;
}

.page-about .about-index__title {
  margin: 0 0 .55rem;
  font-family: var(--ky-mono);
  font-size: .66rem;
  letter-spacing: .18em;
  color: var(--ky-gray);
}

.page-about .about-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .55rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .7rem;
  font-size: .8rem;
  white-space: nowrap;
  color: var(--ky-gray);
  text-decoration: none;
  border: 1px solid var(--about-rule);
  background: rgba(43,26,18,.55);
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}

.page-about .about-index__link span {
  font-family: var(--ky-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: var(--ky-coord);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ky-paper);
  border-color: var(--ky-gold);
  background: rgba(20,59,56,.62);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.2rem, 5vw, 3.6rem);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-flow > .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter--jade,
.page-about .about-chapter--indigo {
  border-top: 0;
  border-radius: var(--ky-r-lg);
  padding: clamp(1.3rem, 3.4vw, 2.4rem);
  margin-block: clamp(1rem, 3vw, 1.8rem);
}

.page-about .about-chapter--jade {
  background: linear-gradient(158deg, rgba(20,59,56,.94), rgba(20,59,56,.52));
  border: 1px solid rgba(127,200,184,.22);
}

.page-about .about-chapter--indigo {
  background: linear-gradient(158deg, rgba(30,27,51,.95), rgba(30,27,51,.55));
  border: 1px solid rgba(201,162,75,.2);
}

.page-about .ch-head {
  margin-bottom: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .about-lead {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: .97rem;
  line-height: 1.85;
  color: rgba(243,231,211,.85);
}

.page-about .about-subtitle {
  margin: 1.8rem 0 0;
  padding-left: .75rem;
  border-left: 3px solid var(--ky-cinnabar);
}

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

.page-about .about-figure {
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--about-rule);
  background: rgba(43,26,18,.4);
}

.page-about .about-figure__caption,
.page-about .ky-figure__caption {
  padding: .65rem .85rem;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--ky-gray);
  border-top: 1px solid var(--about-rule);
}

/* ---------- 坐标方法论 ---------- */
.page-about .about-gridlayout {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
}

.page-about .about-boardwrap {
  align-self: start;
}

.page-about .about-board {
  position: relative;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  border: 1px solid rgba(201,162,75,.36);
  background-color: rgba(20,59,56,.55);
  background-image:
    repeating-linear-gradient(to right, rgba(127,200,184,.22) 0 1px, transparent 1px 12.5%),
    repeating-linear-gradient(to bottom, rgba(127,200,184,.22) 0 1px, transparent 1px 12.5%);
  box-shadow: inset 0 0 70px rgba(0,0,0,.45);
}

.page-about .about-board__star {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .38rem;
  font-family: var(--ky-mono);
  font-size: .6rem;
  letter-spacing: .1em;
  color: var(--ky-gold);
  white-space: nowrap;
}

.page-about .about-board__star::before {
  content: "";
  flex: none;
  width: .55rem;
  height: .55rem;
  background: var(--ky-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(201,162,75,.16);
}

.page-about .about-board__star--a { left: 10%; top: 24%; }
.page-about .about-board__star--b { left: 44%; top: 50%; }
.page-about .about-board__star--c { left: 20%; top: 74%; }

.page-about .about-board__edge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .3rem;
  font-family: var(--ky-mono);
  font-size: .54rem;
  letter-spacing: .1em;
  color: var(--ky-coord);
  white-space: nowrap;
}

.page-about .about-board__edge::before {
  content: "";
  width: .34rem;
  height: .34rem;
  background: var(--ky-coord);
  flex: none;
}

.page-about .about-board__edge--a { right: 4%; top: 8%; }
.page-about .about-board__edge--b { right: 5%; bottom: 10%; }

.page-about .about-board__note {
  margin: .7rem 0 0;
  font-family: var(--ky-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--ky-gray);
  text-align: center;
}

.page-about .about-point {
  padding: .95rem 0;
  border-top: 1px solid var(--about-rule-cool);
}

.page-about .about-point:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-point h3 {
  margin: 0 0 .45rem;
  color: var(--ky-gold);
  font-size: 1.05rem;
}

.page-about .about-point p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: rgba(243,231,211,.86);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: .9rem;
}

.page-about .role {
  position: relative;
  padding: 1.1rem 1rem 1rem;
  border: 1px solid var(--about-rule);
  background: linear-gradient(165deg, rgba(43,26,18,.88), rgba(26,17,12,.62));
  transition: border-color .25s ease, transform .25s ease;
}

.page-about .role:hover,
.page-about .role:focus-within {
  border-color: rgba(201,162,75,.6);
  transform: translateY(-2px);
}

.page-about .role__coord {
  margin: 0 0 .35rem;
  font-family: var(--ky-mono);
  font-size: .64rem;
  letter-spacing: .16em;
  color: var(--ky-coord);
}

.page-about .role__name {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin: 0 0 .55rem;
}

.page-about .role__num {
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--ky-gold);
  font-weight: 400;
}

.page-about .role__desc {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: rgba(243,231,211,.86);
}

.page-about .role__more {
  margin-top: .7rem;
  border-top: 1px dashed rgba(201,162,75,.24);
}

.page-about .role__more summary {
  cursor: pointer;
  list-style: none;
  padding-top: .6rem;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--ky-coord);
}

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

.page-about .role__more summary::before {
  content: "＋ ";
}

.page-about .role__more[open] summary::before {
  content: "－ ";
}

.page-about .role__more ul {
  margin: .6rem 0 0;
  padding-left: 1.1rem;
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(243,231,211,.8);
}

.page-about .role__more li + li {
  margin-top: .3rem;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-left: 1.7rem;
  margin-top: .5rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: .46rem;
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: linear-gradient(to bottom, rgba(201,162,75,.85), rgba(127,200,184,.28));
}

.page-about .tl-item {
  position: relative;
  padding: .55rem 0 1.15rem;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -1.52rem;
  top: 1.05rem;
  width: .62rem;
  height: .62rem;
  border: 1px solid var(--ky-gold);
  background: var(--ky-indigo);
  transform: rotate(45deg);
  transition: background .3s ease, box-shadow .3s ease;
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--ky-gold);
  box-shadow: 0 0 0 4px rgba(201,162,75,.18);
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--ky-mono);
  font-size: 1rem;
  letter-spacing: .12em;
  color: var(--ky-gold);
}

.page-about .tl-q {
  margin-left: .5rem;
  font-size: .64rem;
  letter-spacing: .16em;
  color: var(--ky-coord);
}

.page-about .tl-title {
  margin: .3rem 0 .4rem;
  font-size: 1.08rem;
  color: var(--ky-paper);
}

.page-about .tl-desc {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: rgba(243,231,211,.84);
  max-width: 58ch;
}

.page-about .tl-tag {
  margin: .5rem 0 0;
  font-family: var(--ky-mono);
  font-size: .62rem;
  letter-spacing: .14em;
  color: rgba(127,200,184,.72);
  transition: color .25s ease;
}

.page-about .tl-item:hover .tl-tag,
.page-about .tl-item:focus-within .tl-tag {
  color: var(--ky-coord);
}

.page-about .about-more-link {
  margin: 1.4rem 0 0;
}

.page-about .about-textlink {
  display: inline-block;
  padding-bottom: .2rem;
  font-family: var(--ky-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--ky-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201,162,75,.5);
  transition: color .25s ease, border-color .25s ease;
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  color: var(--ky-paper);
  border-color: var(--ky-paper);
}

/* ---------- 区域与数据 ---------- */
.page-about .about-region {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-region__text p {
  margin: 0 0 .9rem;
  font-size: .96rem;
  line-height: 1.85;
  color: rgba(243,231,211,.87);
  max-width: 62ch;
}

.page-about .about-facts {
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-facts li {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .9rem;
  padding: .7rem 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--ky-paper);
  border-bottom: 1px dashed rgba(201,162,75,.2);
  word-break: break-word;
}

.page-about .about-facts span {
  flex: 0 0 auto;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--ky-gold);
  padding-top: .1rem;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .metric {
  background: rgba(30,27,51,.94);
  padding: 1.1rem .9rem 1.2rem;
}

.page-about .metric:nth-child(2n) {
  background: #241f3c;
}

.page-about .metric strong {
  display: block;
  font-family: var(--ky-serif);
  font-size: clamp(1.3rem, 4.4vw, 1.75rem);
  line-height: 1.2;
  color: var(--ky-gold);
}

.page-about .metric span {
  display: block;
  margin-top: .35rem;
  font-family: var(--ky-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--ky-gray);
}

/* ---------- 合作与复核 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 1px;
  margin-bottom: 1.3rem;
  background: rgba(127,200,184,.2);
  border: 1px solid rgba(127,200,184,.2);
}

.page-about .eco-cell {
  padding: 1rem .95rem 1.1rem;
  background: rgba(43,26,18,.86);
}

.page-about .eco-cell h3 {
  margin: 0 0 .45rem;
  font-size: 1.02rem;
  color: var(--ky-coord);
}

.page-about .eco-cell p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(243,231,211,.82);
}

.page-about .about-review {
  display: grid;
  gap: 1rem;
  margin-top: 1.1rem;
}

.page-about .rev-step {
  padding-top: .85rem;
  border-top: 2px solid var(--ky-cinnabar);
}

.page-about .rev-no {
  margin: 0 0 .4rem;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--ky-cinnabar);
}

.page-about .rev-step p:last-child {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(243,231,211,.85);
}

/* ---------- 到访 ---------- */
.page-about .about-visit {
  margin-top: clamp(1.8rem, 5vw, 3.2rem);
  padding-block: clamp(2rem, 6vw, 3.8rem);
  background: linear-gradient(152deg, rgba(74,23,32,.96), rgba(43,26,18,.94));
  border-top: 1px solid rgba(201,162,75,.34);
  border-bottom: 1px solid rgba(201,162,75,.34);
}

.page-about .about-visit__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
}

.page-about .about-visit__copy p {
  margin: .9rem 0 0;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(243,231,211,.88);
}

.page-about .about-visit__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}

.page-about .about-visit__card {
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid rgba(201,162,75,.36);
  background: rgba(26,17,12,.6);
}

.page-about .about-visit__cardhead {
  margin: 0 0 .5rem;
  font-family: var(--ky-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  color: var(--ky-gold);
}

.page-about .visit-line {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .9rem;
  margin: 0;
  padding: .65rem 0;
  border-bottom: 1px dashed rgba(201,162,75,.22);
  font-size: .9rem;
  line-height: 1.7;
}

.page-about .visit-line:last-child {
  border-bottom: 0;
}

.page-about .visit-line b {
  flex: 0 0 auto;
  font-family: var(--ky-mono);
  font-size: .66rem;
  font-weight: 400;
  letter-spacing: .14em;
  color: var(--ky-coord);
  padding-top: .14rem;
}

.page-about .visit-line span {
  color: var(--ky-paper);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__lede {
    font-size: 1.05rem;
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(2rem, 5vw, 3.6rem);
  }

  .page-about .about-gridlayout {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-region {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }

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

  .page-about .about-visit__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 188px minmax(0, 1fr);
    gap: clamp(1.6rem, 4vw, 3.4rem);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 7.5rem;
    margin-bottom: 0;
  }

  .page-about .about-index__list {
    display: grid;
    gap: .1rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    padding: .55rem .5rem .55rem .8rem;
    border: 0;
    border-left: 2px solid rgba(201,162,75,.28);
    background: transparent;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--ky-gold);
    background: rgba(20,59,56,.38);
  }

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

  .page-about .about-board {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}