.page-about {
  --about-hair: #D8CFC0;
  --about-hair-soft: rgba(216, 207, 192, 0.5);
  --about-hair-dark: rgba(251, 246, 238, 0.16);
  --about-ink-soft: #4A4D53;
  --about-paper-soft: rgba(251, 246, 238, 0.76);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: 22px;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-about .crumbs a:hover {
  color: var(--dusk);
}

.page-about .crumbs-sep {
  margin: 0 10px;
  color: var(--about-hair);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  margin-top: 18px;
  padding: 50px 0 58px;
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--about-hair-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-hair-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.page-about .about-eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--dusk);
}

.page-about .about-title-row {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.page-about .about-title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink-night);
}

.page-about .about-vertical {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--muted);
  border-left: 1px solid var(--about-hair);
  padding-left: 10px;
  white-space: nowrap;
}

.page-about .about-lead {
  max-width: 40ch;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-board {
  background: var(--ink-night);
  border: 1px solid var(--ink-night);
}

.page-about .board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--about-hair-dark);
}

.page-about .board-brand {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .board-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid rgba(242, 169, 59, 0.5);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-about .board-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .board-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--about-hair-dark);
}

.page-about .board-row:last-child {
  border-bottom: 0;
}

.page-about .board-key {
  font-size: 13px;
  color: rgba(251, 246, 238, 0.68);
}

.page-about .board-val {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gold);
  white-space: nowrap;
}

/* ---------- 首屏下方氛围带 ---------- */

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

.page-about .about-banner .media-frame {
  width: 100%;
}

.page-about .about-banner .media-caption {
  margin: 0;
  padding: 14px 20px 0;
  max-width: 66ch;
}

.page-about .media-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */

.page-about .about-scene {
  padding: 62px 0;
}

.page-about .scene-head {
  margin-bottom: 34px;
}

.page-about .scene-kicker {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--dusk);
}

.page-about .scene-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink-night);
}

.page-about .scene-title::after {
  content: "";
  display: block;
  width: 0;
  height: 3px;
  margin-top: 14px;
  background: var(--gold);
  transition: width 0.32s ease;
}

.page-about .about-scene.is-active .scene-title::after {
  width: 72px;
}

.page-about .scene-tail {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 编年体时间轴 ---------- */

.page-about .tl {
  --tl-pad: 26px;
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--tl-pad);
  list-style: none;
  border-left: 1px solid var(--about-hair);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 42px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 7px;
  left: calc(-1 * var(--tl-pad) - 5px);
  width: 9px;
  height: 9px;
  box-sizing: border-box;
  background: var(--paper);
  border: 1px solid var(--ink-night);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-about .tl-item:hover::before {
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--stand-blue);
  border: 1px solid var(--about-hair);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .tl-item:hover .tl-year {
  color: var(--dusk);
  border-color: var(--dusk);
}

.page-about .tl-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 27px);
  line-height: 1.32;
  color: var(--ink-night);
}

.page-about .tl-text {
  max-width: 42ch;
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .tl-note {
  display: inline-block;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-left: 2px solid var(--gold);
}

.page-about .about-side-figure {
  margin: 46px 0 0;
  max-width: 520px;
}

.page-about .about-side-figure .media-caption {
  margin: 12px 0 0;
}

/* ---------- 全宽引文带 ---------- */

.page-about .about-quote {
  padding: 60px 0;
  background: var(--deep-teal);
  border-top: 1px solid var(--about-hair-dark);
  border-bottom: 1px solid var(--about-hair-dark);
}

.page-about .about-quote--wine {
  background: var(--wine);
}

.page-about .quote-text {
  position: relative;
  max-width: 26ch;
  margin: 0;
  padding-left: 26px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 35px);
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .quote-text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: var(--gold);
}

/* ---------- 团队四角色 ---------- */

.page-about .roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .role {
  background: var(--paper);
}

.page-about .role-sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 18px;
  cursor: pointer;
  list-style: none;
  transition: background 0.18s ease;
}

.page-about .role-sum::-webkit-details-marker {
  display: none;
}

.page-about .role-sum:hover {
  background: rgba(242, 169, 59, 0.13);
}

.page-about .role-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .role-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  color: var(--ink-night);
}

.page-about .role-plus {
  position: relative;
  flex: none;
  margin-left: auto;
  width: 14px;
  height: 14px;
}

.page-about .role-plus::before,
.page-about .role-plus::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-about .role-plus::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .role-plus::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .role[open] .role-plus::before {
  background: var(--dusk);
}

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

.page-about .role-body {
  padding: 0 18px 22px;
}

.page-about .role-body > p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .role-tasks {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .role-tasks li {
  position: relative;
  padding: 9px 0 9px 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
  border-bottom: 1px solid rgba(216, 207, 192, 0.55);
}

.page-about .role-tasks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 2px;
  background: var(--dusk);
}

.page-about .role-tasks li:last-child {
  border-bottom: 0;
}

.page-about .about-team-figure {
  margin: 40px 0 0;
}

.page-about .about-team-figure .media-caption {
  margin: 12px 0 0;
}

/* ---------- 入库标准 ---------- */

.page-about .about-scene--verify {
  background: var(--deep-teal);
  border-top: 1px solid var(--about-hair-dark);
  border-bottom: 1px solid var(--about-hair-dark);
}

.page-about .about-scene--verify .scene-kicker {
  color: var(--gold);
}

.page-about .about-scene--verify .scene-title {
  color: var(--paper);
}

.page-about .about-scene--verify .scene-title::after {
  background: var(--dusk);
}

.page-about .about-scene--verify .scene-tail {
  color: rgba(251, 246, 238, 0.6);
}

.page-about .about-verify-lead {
  max-width: 58ch;
  margin: 0 0 34px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-paper-soft);
}

.page-about .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(251, 246, 238, 0.22);
  border: 1px solid rgba(251, 246, 238, 0.22);
}

.page-about .flow-step {
  padding: 26px 22px 30px;
  background: var(--deep-teal);
}

.page-about .flow-no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .flow-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .flow-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(251, 246, 238, 0.74);
}

/* ---------- 覆盖 ---------- */

.page-about .cov-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .cov-cell {
  padding: 24px 20px 26px;
  background: var(--paper);
}

.page-about .cov-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-night);
}

.page-about .cov-key {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--about-ink-soft);
}

.page-about .cov-text {
  max-width: 62ch;
  margin: 34px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .cov-tip {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .inline-link {
  color: var(--dusk);
  text-decoration: none;
  border-bottom: 1px solid var(--dusk);
  padding-bottom: 1px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .inline-link:hover {
  color: var(--ink-night);
  border-color: var(--ink-night);
}

/* ---------- 下一年 ---------- */

.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .next-card {
  padding-top: 20px;
  border-top: 3px solid var(--gold);
}

.page-about .next-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--dusk);
}

.page-about .next-card h3 {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink-night);
}

.page-about .next-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 收尾 ---------- */

.page-about .about-close {
  padding: 62px 0;
  background: var(--ink-night);
  color: var(--paper);
}

.page-about .close-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .close-text {
  max-width: 58ch;
  margin: 0 0 30px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-paper-soft);
}

.page-about .close-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-about .close-link {
  display: inline-block;
  padding: 10px 16px;
  font-size: 13.5px;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid rgba(251, 246, 238, 0.3);
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-about .close-link:hover {
  color: var(--ink-night);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .cov-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .about-vertical {
    display: block;
  }

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

  .page-about .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px;
  }
}

@media (min-width: 760px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-banner .media-caption {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 64px 0 70px;
  }

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

  .page-about .about-side-figure {
    margin-left: auto;
  }

  .page-about .about-team-figure {
    width: 58%;
    margin-left: auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }

  .page-about .about-scene {
    padding: 92px 0;
  }

  .page-about .scene-head {
    margin-bottom: 44px;
  }

  .page-about .tl {
    --tl-pad: 46px;
  }

  .page-about .tl-item {
    padding-bottom: 54px;
  }

  .page-about .about-quote {
    padding: 92px 0;
  }

  .page-about .about-close {
    padding: 88px 0;
  }

  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 44px;
  }
}

@media (min-width: 1120px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .scene-title::after,
  .page-about .tl-item::before,
  .page-about .tl-year,
  .page-about .role-plus::before,
  .page-about .role-plus::after,
  .page-about .close-link,
  .page-about .inline-link {
    transition: none;
  }

  .page-about .about-scene .scene-title::after {
    width: 72px;
  }
}