.page-about {
  --about-rule: rgba(200, 164, 92, 0.22);
  --about-rule-soft: rgba(200, 164, 92, 0.12);
  --about-slate: rgba(58, 69, 82, 0.38);
  --about-pad: clamp(44px, 6vw, 96px);
  padding-bottom: clamp(56px, 8vw, 110px);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(16px, 3vw, 28px) 0 clamp(36px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero__watermark {
  position: absolute;
  top: -0.35em;
  right: -0.1em;
  font-size: clamp(64px, 14vw, 148px);
  line-height: 1;
  color: rgba(200, 164, 92, 0.07);
  letter-spacing: 0.06em;
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-hero__body h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(30px, 5.2vw, 60px);
  line-height: 1.22;
  letter-spacing: 0.04em;
  margin: 14px 0 0;
  color: var(--porcelain);
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  max-width: 38em;
}

.page-about .about-hero__meta {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .about-hero__meta li {
  color: var(--mist);
  font-size: 13px;
  letter-spacing: 0.03em;
  padding-left: 12px;
  border-left: 1px solid var(--gold);
}

.page-about .about-hero__meta .mono {
  color: var(--gold-hi);
  font-size: 14px;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 4;
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero__caption {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold-dim);
  text-align: right;
}

/* 章节目录 */
.page-about .about-index {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  padding: 12px 0;
  margin-bottom: var(--about-pad);
}

.page-about .about-index__label {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold-dim);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 2px 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index__link {
  display: block;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid var(--about-rule-soft);
  background: rgba(23, 24, 29, 0.6);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
}

/* 通用章节 */
.page-about .about-section {
  margin-bottom: var(--about-pad);
}

.page-about .about-section__num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.3;
  letter-spacing: 0.05em;
  color: var(--porcelain);
  margin: 0;
}

.page-about .about-section__lead {
  margin: 16px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
  max-width: 40em;
}

.page-about .about-section__head {
  margin-bottom: clamp(24px, 3.4vw, 40px);
  max-width: 46em;
}

.page-about .about-section__text p {
  color: var(--mist);
  font-size: 15px;
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .about-section__text--narrow {
  max-width: 44em;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-link {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--porcelain);
  border-color: var(--gold);
}

.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  filter: saturate(0.85);
}

.page-about .about-figure--wide {
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .about-figure--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .about-figure__caption {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold-dim);
}

.page-about .about-quote {
  margin: 22px 0;
  padding: 20px 22px;
  background: var(--teal);
  border-left: 3px solid var(--cinnabar);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--porcelain);
}

/* 团队角色 */
.page-about .about-roles {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  background: var(--about-slate);
  border: 1px solid var(--about-rule-soft);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-role:hover {
  border-color: var(--about-rule);
}

.page-about .about-role__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-role__tag {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-size: 12px;
  color: var(--gold-hi);
  border: 1px solid var(--gold-dim);
}

.page-about .about-role__name {
  flex: 1;
  font-family: var(--font-serif);
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--porcelain);
}

.page-about .about-role .disclosure__body {
  padding: 0 18px 18px 60px;
}

.page-about .about-role .disclosure__body p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.85;
}

.page-about .about-role[data-open] {
  border-color: var(--gold);
}

/* 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(16px, 3vw, 30px);
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--about-rule) 55%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  border-bottom: 1px solid var(--about-rule-soft);
}

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

.page-about .about-timeline__marker {
  position: absolute;
  left: calc(-1 * clamp(16px, 3vw, 30px) + 0px);
  top: 22px;
  width: 7px;
  height: 7px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-timeline__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 0;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-timeline__phase {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold-dim);
  min-width: 4.6em;
}

.page-about .about-timeline__name {
  flex: 1;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 19px);
  letter-spacing: 0.06em;
  color: var(--porcelain);
}

.page-about .about-timeline .disclosure__body {
  padding: 0 0 20px 0;
}

.page-about .about-timeline .disclosure__body p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.9;
  max-width: 42em;
}

.page-about .about-timeline__item[data-open] .about-timeline__phase,
.page-about .about-timeline__item[data-open] .about-timeline__name {
  color: var(--gold-hi);
}

/* 服务记录 */
.page-about .about-split--records {
  align-items: start;
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-record {
  margin: 22px 0;
  background: var(--about-slate);
  border: 1px solid var(--about-rule-soft);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .about-record__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 15px 18px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-record__title {
  flex: 1;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--porcelain);
}

.page-about .about-record .disclosure__body {
  padding: 0 18px 20px;
}

.page-about .about-fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-fields li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  color: var(--porcelain);
  padding: 9px 12px;
  background: rgba(11, 11, 13, 0.4);
  border-left: 1px solid var(--gold-dim);
}

.page-about .about-fields .mono {
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.page-about .about-record__note {
  margin: 14px 0 0;
  color: var(--mist);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-aside {
  background: linear-gradient(160deg, rgba(31, 42, 46, 0.92), rgba(23, 24, 29, 0.92));
  border: 1px solid var(--about-rule-soft);
  padding: clamp(20px, 3vw, 30px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-aside__title {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-aside__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-aside__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--porcelain);
}

.page-about .about-aside__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-aside__foot {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-rule-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

/* 复核节奏 */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  background: var(--about-rule-soft);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-stat {
  background: var(--ink);
  padding: clamp(20px, 3vw, 30px) clamp(18px, 2.6vw, 26px);
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-stat__num {
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: 0.04em;
  color: var(--gold-hi);
  line-height: 1.1;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* 合作生态 */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  padding: clamp(22px, 3.4vw, 36px) 0;
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(64px, 12vw, 132px);
  line-height: 0.85;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-partners__cap {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.85;
  max-width: 24em;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-partners__list li {
  display: grid;
  gap: 4px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--porcelain);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-partners__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-partners__list .mono {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--gold-dim);
}

.page-about .about-partners__foot {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 44em;
}

/* 底部条带 */
.page-about .about-band {
  margin-top: clamp(30px, 4vw, 56px);
  border-top: 1px solid var(--gold-dim);
  border-bottom: 1px solid var(--gold-dim);
  background: linear-gradient(100deg, rgba(184, 58, 46, 0.14), rgba(23, 24, 29, 0.9) 46%, rgba(31, 42, 46, 0.9));
  padding: clamp(28px, 4.4vw, 48px) clamp(18px, 3vw, 34px);
}

.page-about .about-band__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-band__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.35;
  letter-spacing: 0.05em;
  color: var(--porcelain);
  max-width: 20em;
}

.page-about .about-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

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

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

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

  .page-about .about-fields li:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.72fr);
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-about .about-split--records {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

  .page-about .about-index__list {
    flex-wrap: wrap;
    overflow: visible;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__trigger {
    padding: 22px 0;
  }
}

@media (min-width: 1100px) {
  .page-about .about-index {
    position: sticky;
    top: 0;
    z-index: 2;
    background: linear-gradient(180deg, rgba(11, 11, 13, 0.96), rgba(11, 11, 13, 0.82));
    backdrop-filter: blur(6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-link,
  .page-about .about-role {
    transition: none;
  }
}