.page-about .wrap {
  padding-top: clamp(18px, 3vw, 34px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--scan);
  margin-bottom: clamp(18px, 3vw, 34px);
}
.page-about .breadcrumb a {
  color: var(--body-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--fox);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(258px, 0.85fr);
    align-items: end;
  }
}
.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7.6vw, 4.2rem);
  line-height: 1.04;
  color: var(--cream);
  margin: 0.34em 0 0.44em;
  max-width: 16ch;
}
.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--fox);
}
.page-about .about-hero .lede {
  max-width: 46ch;
  font-size: clamp(0.96rem, 1.6vw, 1.08rem);
  line-height: 1.82;
  color: var(--body-soft);
  margin: 0;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-hero__side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
@media (min-width: 980px) {
  .page-about .about-hero__side {
    border-left: 1px solid var(--line);
    padding-left: clamp(16px, 2.4vw, 26px);
  }
}
.page-about .about-hero__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-facts li {
  background: var(--ink-deep);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-facts__label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--body-soft);
}

/* 骨架布局 */
.page-about .about-layout {
  display: grid;
  gap: clamp(22px, 3.5vw, 48px);
  padding-top: clamp(26px, 4.5vw, 54px);
}
@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: 198px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }
}
.page-about .about-layout > * {
  min-width: 0;
}

/* 章节轨道 */
.page-about .about-rail ol {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-rail ol::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail li {
  position: relative;
  flex: none;
}
.page-about .about-rail a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 13px;
  font-size: 0.78rem;
  color: var(--body-soft);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--steel);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  color: var(--cream);
  border-color: var(--cyan);
  background: var(--steel-hi);
}
.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fox);
}
@media (min-width: 1080px) {
  .page-about .about-rail {
    align-self: start;
    position: sticky;
    top: calc(var(--bar-h) + 26px);
  }
  .page-about .about-rail ol {
    display: block;
    overflow: visible;
    padding: 4px 0 4px 0;
    border-left: 1px solid var(--line);
  }
  .page-about .about-rail a {
    display: block;
    border: 0;
    background: none;
    clip-path: none;
    padding: 11px 8px 11px 22px;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--body-soft);
  }
  .page-about .about-rail a::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 50%;
    width: 9px;
    height: 9px;
    transform: translateY(-50%) rotate(45deg);
    background: var(--ink);
    border: 1px solid var(--line);
    transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
  }
  .page-about .about-rail a:hover,
  .page-about .about-rail a:focus-visible {
    background: none;
  }
  .page-about .about-rail a:hover::before,
  .page-about .about-rail a:focus-visible::before {
    background: var(--fox);
    border-color: var(--fox);
  }
}

/* 章节 */
.page-about .about-section {
  padding-bottom: clamp(30px, 5vw, 56px);
  margin-bottom: clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 22px);
}
.page-about .about-section:last-of-type {
  border-bottom: 0;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-about .about-section__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--fox);
  margin-bottom: 10px;
}
.page-about .about-section h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.8vw, 2.4rem);
  line-height: 1.1;
  color: var(--cream);
  margin: 0 0 clamp(14px, 2.4vw, 22px);
}
.page-about .about-section h2::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 12px;
  background: linear-gradient(90deg, var(--fox), var(--fox-soft));
}
.page-about .about-section__grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 32px);
}
.page-about .about-section__grid > * {
  min-width: 0;
}
@media (min-width: 940px) {
  .page-about .about-section__grid {
    grid-template-columns: minmax(0, 1fr) minmax(210px, 252px);
  }
}
.page-about .about-body .lede {
  max-width: 52ch;
  color: var(--body-soft);
  margin: 0 0 clamp(18px, 3vw, 28px);
}
.page-about .prose p {
  margin: 0 0 1.05em;
  max-width: 44ch;
  font-size: clamp(0.94rem, 1.5vw, 1.02rem);
  line-height: 1.86;
  color: var(--body-soft);
}
.page-about .prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-note {
  max-width: 54ch;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--fox);
  font-size: 0.85rem;
  line-height: 1.78;
  color: var(--scan);
}

/* 窄栏注释 */
.page-about .about-side-note {
  border-left: 3px solid var(--fox);
  background: linear-gradient(180deg, rgba(255, 90, 31, 0.09), transparent 72%), var(--ink-deep);
  padding: clamp(14px, 2vw, 20px);
}
.page-about .about-side-note__label {
  margin: 0 0 12px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}
.page-about .about-side-note ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: 0.85rem;
  line-height: 1.62;
  color: var(--body-soft);
}
.page-about .about-side-note li {
  position: relative;
  padding-left: 14px;
}
.page-about .about-side-note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  transform: rotate(45deg);
  background: var(--fox);
}

/* 图片容器 */
.page-about .about-media {
  margin: 0 0 clamp(20px, 3vw, 32px);
}
.page-about .about-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 内容体系 */
.page-about .system-list {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 780px) {
  .page-about .system-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .system-item {
  background: var(--ink-deep);
  padding: clamp(16px, 2.4vw, 24px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 12px;
  align-content: start;
  min-width: 0;
  transition: background 0.25s var(--ease);
}
.page-about .system-item:hover {
  background: var(--steel);
}
.page-about .system-item[data-tone="venue"] {
  background-image: repeating-linear-gradient(135deg, rgba(0, 224, 198, 0.06) 0 9px, transparent 9px 18px);
}
.page-about .system-item[data-tone="venue"]:hover {
  background-color: var(--steel);
}
.page-about .system-item[data-tone="column"] {
  background-image: repeating-linear-gradient(0deg, rgba(242, 233, 220, 0.045) 0 1px, transparent 1px 7px);
}
.page-about .system-item[data-tone="column"]:hover {
  background-color: var(--steel);
}
.page-about .system-item__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--fox);
  padding-top: 0.4em;
}
.page-about .system-item h3 {
  margin: 0 0 0.45em;
  font-size: 1.04rem;
  line-height: 1.4;
  color: var(--cream);
}
.page-about .system-item p {
  grid-column: 2;
  margin: 0 0 0.85em;
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--body-soft);
}
.page-about .system-item__tags {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.page-about .about-tag {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border: 1px solid var(--line);
  color: var(--body-soft);
  background: rgba(242, 233, 220, 0.03);
}

/* 版本演进 */
.page-about .evo {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
}
.page-about .evo::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--fox), var(--line) 58%, transparent);
}
.page-about .evo__item {
  position: relative;
  padding-bottom: 12px;
}
.page-about .evo__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 20px;
  width: 10px;
  height: 10px;
  transform: rotate(45deg);
  background: var(--ink);
  border: 1px solid var(--fox);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .evo__item:hover::before {
  background: var(--fox);
}
.page-about .evo__detail {
  border: 1px solid var(--line);
  border-left: 3px solid var(--fox);
  background: linear-gradient(135deg, rgba(255, 90, 31, 0.1), transparent 46%), var(--ink-deep);
}
.page-about .evo__detail summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  transition: background 0.2s var(--ease);
}
.page-about .evo__detail summary::-webkit-details-marker {
  display: none;
}
.page-about .evo__detail summary:hover,
.page-about .evo__detail[open] summary {
  background: rgba(255, 90, 31, 0.08);
}
.page-about .evo__ver {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  white-space: nowrap;
}
.page-about .evo__title {
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--cream);
}
.page-about .evo__hint {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--fox);
  transition: transform 0.25s var(--ease);
}
.page-about .evo__detail[open] .evo__hint {
  transform: rotate(45deg);
}
.page-about .evo__body {
  padding: 0 16px 16px;
}
.page-about .evo__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--body-soft);
}

/* 合作生态 */
.page-about .partner-grid {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(20px, 3vw, 30px);
}
@media (min-width: 820px) {
  .page-about .partner-grid {
    grid-template-columns: 0.9fr 1.05fr 1.3fr;
  }
}
.page-about .partner-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: var(--steel);
  min-width: 0;
  transition: border-top-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-about .partner-card:hover {
  border-top-color: var(--fox);
  background: var(--steel-hi);
}
.page-about .partner-card:nth-child(2) {
  border-top-color: var(--fox-soft);
}
.page-about .partner-card:nth-child(3) {
  border-top-color: var(--fox);
}
.page-about .partner-card__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--cream);
}
.page-about .partner-card h3 {
  margin: 0;
  font-size: 0.98rem;
  color: var(--cyan-soft);
}
.page-about .partner-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.74;
  color: var(--body-soft);
}

/* 团队 */
.page-about .team-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 820px) {
  .page-about .team-roster {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .team-roster__item {
  background: var(--ink-deep);
  padding: clamp(16px, 2.4vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  position: relative;
  transition: background 0.25s var(--ease);
}
.page-about .team-roster__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--fox);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}
.page-about .team-roster__item:hover {
  background: var(--steel);
}
.page-about .team-roster__item:hover::after {
  opacity: 1;
}
.page-about .team-roster__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 2rem);
  line-height: 1;
  color: var(--cyan);
}
.page-about .team-roster__item h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--cream);
}
.page-about .team-roster__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.76;
  color: var(--body-soft);
}
.page-about .pipeline {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 620px) {
  .page-about .pipeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .pipeline li {
  background: var(--ink-deep);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--body-soft);
}
.page-about .pipeline__num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--fox);
}

/* 荣誉与资产 */
.page-about .honor-row {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: clamp(18px, 3vw, 28px);
}
@media (min-width: 700px) {
  .page-about .honor-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .honor {
  background: var(--steel);
  padding: clamp(16px, 2.4vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--cream);
  min-width: 0;
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.page-about .honor:hover {
  background: var(--steel-hi);
  box-shadow: inset 3px 0 0 var(--fox);
}
.page-about .honor span {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--body-soft);
}
.page-about .asset-list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
@media (min-width: 700px) {
  .page-about .asset-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .asset-list li {
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--ink-deep);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  transition: border-left-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-about .asset-list li:hover {
  border-left-color: var(--fox);
  background: var(--steel);
}
.page-about .asset-list strong {
  font-size: 0.96rem;
  color: var(--cream);
}
.page-about .asset-list span {
  font-size: 0.86rem;
  line-height: 1.74;
  color: var(--body-soft);
}

/* 继续浏览 */
.page-about .about-next {
  margin-top: clamp(18px, 3vw, 30px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line);
}
.page-about .about-next__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
}
.page-about .about-next__links {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (min-width: 720px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-next__links a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background: var(--ink-deep);
  text-decoration: none;
  font-size: 0.94rem;
  color: var(--cream);
  min-width: 0;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .about-next__links a span {
  font-size: 0.76rem;
  color: var(--scan);
  transition: color 0.2s var(--ease);
}
.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  background: var(--steel);
  color: var(--cyan);
}
.page-about .about-next__links a:hover span,
.page-about .about-next__links a:focus-visible span {
  color: var(--cyan-soft);
}

@media (min-width: 1280px) {
  .page-about .about-hero h1 {
    max-width: 14ch;
  }
  .page-about .prose p {
    max-width: 46ch;
  }
}