.page-about {
  --ab-grid: rgba(34, 48, 68, 0.35);
  --ab-line-soft: rgba(34, 48, 68, 0.6);
  --ab-hover: rgba(22, 35, 58, 0.6);
  --ab-panel: rgba(13, 20, 32, 0.82);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 20px;
  padding-bottom: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: 26px;
  padding-bottom: 54px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 62%;
  height: 100%;
  background: radial-gradient(120% 80% at 0% 0%, rgba(47, 224, 210, 0.11), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 10vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 14px 0 18px;
  color: var(--fg);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--fg-dim);
}

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

/* 面板：版本状态台 */
.page-about .about-plate {
  position: relative;
  border: var(--hair);
  background-color: var(--layer);
  background-image:
    linear-gradient(var(--ab-panel), var(--ab-panel)),
    linear-gradient(rgba(34, 48, 68, 0.85) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 48, 68, 0.85) 1px, transparent 1px);
  background-size: auto, 28px 28px, 28px 28px;
  box-shadow: var(--shadow-slab);
  padding: 18px 20px 24px;
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--amber) 0 49%, transparent 50%);
  opacity: 0.9;
  pointer-events: none;
}

.page-about .about-plate__row {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-plate__row:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-about .about-plate__k {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

.page-about .about-plate__v {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--data);
  text-align: right;
}

.page-about .about-plate__v--hot {
  color: var(--amber);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 48px 0;
}

.page-about .about-sec::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--ab-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 28%, #000 72%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 28%, #000 72%, transparent);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-sec > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-sec--last {
  padding-bottom: 64px;
}

.page-about .about-sec__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

/* 左侧窄栏 */
.page-about .about-rail {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 14px;
  padding: 0 0 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rail__idx {
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-rail__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
}

.page-about .about-rail__ver {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--data);
  text-align: right;
}

/* 右侧正文 */
.page-about .about-body__lede {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--fg-dim);
}

.page-about .about-body__close {
  margin: 22px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--fg-dim);
}

.page-about .about-tail {
  margin: 24px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--fg-dim);
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
}

/* ---------- 意象三定义 ---------- */
.page-about .about-defs {
  margin: 26px 0 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-def {
  background: var(--bg);
  padding: 18px 20px;
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-def:hover {
  background: var(--relay);
}

.page-about .about-def dt {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-def dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fg-dim);
}

/* 意象配图 */
.page-about .about-fig--stack {
  margin: 30px 0 0;
}

.page-about .about-fig--stack .figure__media {
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-fig--stack img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}

/* 不使用表达 */
.page-about .about-strip {
  margin-top: 28px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--magenta);
  background: var(--layer);
  box-shadow: var(--shadow-slab);
  padding: 18px 20px;
}

.page-about .about-strip__k {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--magenta);
  margin-bottom: 12px;
}

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

.page-about .about-strip__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-about .about-strip__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--magenta);
}

/* ---------- 全宽氛围带 ---------- */
.page-about .about-band-sec {
  padding: 8px 0 12px;
}

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

.page-about .about-band .figure__media {
  aspect-ratio: 16 / 7;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.6) brightness(0.8);
}

/* 时间轴后的横带 */
.page-about .about-band--axis {
  margin-top: 34px;
}

.page-about .about-band--axis .figure__media {
  aspect-ratio: 16 / 5;
}

/* ---------- 栏目分工 ---------- */
.page-about .about-roles {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  border: 1px solid var(--line);
  background: var(--layer);
  box-shadow: var(--shadow-slab);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-role:hover {
  border-color: #2c4058;
}

.page-about .about-role[open] {
  border-color: rgba(47, 224, 210, 0.55);
  box-shadow: var(--shadow-slab-cyan);
}

.page-about .about-role > summary {
  list-style: none;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}

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

.page-about .about-role > summary:hover {
  background: var(--ab-hover);
}

.page-about .about-role > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-role > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  width: 20px;
  text-align: center;
  color: var(--cyan);
}

.page-about .about-role[open] > summary::after {
  content: "−";
  color: var(--amber);
}

.page-about .about-role__code {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-role__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  color: var(--fg);
}

.page-about .about-role__freq {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--fg-dim);
  white-space: nowrap;
}

.page-about .about-role__body {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--line);
}

.page-about .about-role__body p {
  margin: 14px 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fg-dim);
}

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

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

.page-about .about-role__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  background: var(--relay);
  transform: rotate(45deg);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 24px 0 14px;
  background: linear-gradient(180deg, rgba(13, 20, 32, 0.72), rgba(6, 9, 15, 0));
}

.page-about .about-timeline__scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 10px;
  scrollbar-width: thin;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  min-width: 980px;
}

.page-about .about-tl {
  flex: 1 0 138px;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-left: 1px solid var(--ab-line-soft);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-tl:first-child {
  border-left-color: transparent;
}

.page-about .about-tl:hover {
  background: var(--ab-hover);
}

.page-about .about-tl__year {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--data);
}

.page-about .about-tl__axis {
  position: relative;
  display: block;
  height: 1px;
  background: var(--ab-line-soft);
}

.page-about .about-tl__dot {
  position: absolute;
  top: -4px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--relay);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tl__ver {
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--fg);
}

.page-about .about-tl__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--fg-dim);
  transition: color var(--dur) var(--ease);
}

.page-about .about-tl:hover .about-tl__dot,
.page-about .about-tl:focus-within .about-tl__dot {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-tl:hover .about-tl__note,
.page-about .about-tl:focus-within .about-tl__note {
  color: var(--fg);
}

.page-about .about-tl--hot .about-tl__dot {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-tl--hot .about-tl__ver {
  color: var(--amber);
}

.page-about .about-timeline__hint {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: 28px;
}

.page-about .about-team__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 30px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: var(--relay);
  margin-bottom: 16px;
}

.page-about .about-team__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-team__num {
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-about .about-team__unit {
  font-size: 13px;
  color: var(--fg-dim);
}

.page-about .about-team__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  background: var(--layer);
  box-shadow: var(--shadow-slab);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  border-color: rgba(47, 224, 210, 0.6);
  box-shadow: var(--shadow-slab-cyan);
  transform: translateY(-3px);
}

.page-about .about-team__code {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  color: var(--fg);
}

.page-about .about-team__count {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-about .about-team__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--fg-dim);
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

/* ---------- 口径流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-step {
  background: var(--bg);
  padding: 20px 18px;
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background: var(--layer);
}

.page-about .about-step__n {
  display: block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-step__t {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  color: var(--fg);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-about .about-note {
  margin-top: 26px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--layer);
  box-shadow: var(--shadow-slab-cyan);
  padding: 18px 20px;
}

.page-about .about-note__k {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fg);
  max-width: 68ch;
}

/* ---------- 边界 ---------- */
.page-about .about-limits {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-limits li {
  position: relative;
  padding: 14px 16px 14px 34px;
  border: 1px solid var(--line);
  background: var(--layer);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg-dim);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-limits li:hover {
  border-color: rgba(47, 224, 210, 0.55);
  color: var(--fg);
}

.page-about .about-limits li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 22px;
  width: 8px;
  height: 8px;
  background: var(--relay);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

/* 继续阅读 */
.page-about .about-paths {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-paths a {
  display: block;
  padding: 14px 18px;
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-paths a:hover {
  background: var(--relay);
  color: var(--cyan);
}

.page-about .about-paths a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

/* ---------- 小屏适配 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__title {
    font-size: 34px;
  }

  .page-about .about-plate {
    padding: 16px 16px 22px;
  }

  .page-about .about-plate__v {
    font-size: 13px;
  }

  .page-about .about-role > summary {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

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

  .page-about .about-team__num {
    font-size: 22px;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 861px) {
  .page-about .about-crumb {
    padding-top: 24px;
  }

  .page-about .about-hero {
    padding-top: 34px;
    padding-bottom: 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero__aside {
    padding-top: 46px;
  }

  .page-about .about-sec {
    padding: 64px 0;
  }

  .page-about .about-sec__grid {
    grid-template-columns: minmax(150px, 210px) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 0 22px 0 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    position: sticky;
    top: calc(var(--head-h-sm) + 26px);
    align-self: start;
  }

  .page-about .about-rail__idx {
    font-size: 34px;
  }

  .page-about .about-rail__ver {
    margin-left: 0;
    text-align: left;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
    width: 100%;
  }

  .page-about .about-body__lede {
    font-size: 17px;
  }

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

  .page-about .about-role:nth-child(even) {
    margin-left: 22px;
  }

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

  .page-about .about-team__item:nth-child(2),
  .page-about .about-team__item:nth-child(4) {
    margin-top: 20px;
  }

  .page-about .about-team {
    padding-bottom: 20px;
  }

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

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

  .page-about .about-band .figure__media {
    aspect-ratio: 16 / 6;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__item:hover,
  .page-about .about-team__item:focus-within {
    transform: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</invoke>