.page-about {
  --about-gap: clamp(24px, 3.4vw, 46px);
  --about-line: 1px solid var(--line);
}

.page-about [id] {
  scroll-margin-top: 92px;
}

.page-about .about-crumbs {
  padding-top: clamp(16px, 2.6vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.2vw, 3.5rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.82;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 26px 0 0;
}

.page-about .about-stat {
  padding: 12px 12px 13px;
  background: rgba(18, 48, 41, 0.72);
  border: 1px solid var(--line);
  border-left: 2px solid var(--lime);
}

.page-about .about-stat__label {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--sage);
  line-height: 1.4;
}

.page-about .about-stat__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.6vw, 1.45rem);
  font-weight: 600;
  color: var(--lime);
  line-height: 1.2;
  white-space: nowrap;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-lime);
  background: var(--stand);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--grid-lines);
  opacity: 0.4;
  pointer-events: none;
}

.page-about .about-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 6px 12px;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--lime);
  z-index: 1;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    padding-top: clamp(26px, 3.4vw, 44px);
  }
}

/* ---------- 档案布局 ---------- */
.page-about .about-archive {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(38px, 5.5vw, 70px);
}

.page-about .about-archive__col > * + * {
  margin-top: var(--about-gap);
}

/* ---------- 左侧轨道 ---------- */
.page-about .about-archive__rail {
  padding: 14px 14px 12px;
  background: rgba(27, 74, 63, 0.36);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-about .rail__title {
  margin: 0 0 10px;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-about .rail__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
}

.page-about .rail__link {
  position: relative;
  display: block;
  padding: 7px 0 7px 18px;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--sage);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .rail__link::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--amber);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .rail__link:hover,
.page-about .rail__link:focus-visible {
  color: var(--mist);
}

.page-about .rail__link:hover::before,
.page-about .rail__link:focus-visible::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.16);
}

@media (min-width: 1000px) {
  .page-about .about-archive {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-archive__rail {
    position: sticky;
    top: 92px;
    padding: 18px 16px 16px;
  }

  .page-about .rail__list {
    display: block;
  }

  .page-about .rail__list::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--lime), rgba(198, 255, 61, 0.12));
  }

  .page-about .rail__link {
    padding: 9px 0 9px 22px;
  }
}

/* ---------- 面板通用 ---------- */
.page-about .panel {
  position: relative;
  background: var(--stand);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.6vw, 30px);
}

.page-about .panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .panel__index {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--lime);
}

.page-about .panel__label {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .panel__badge {
  margin-left: auto;
  padding: 3px 9px;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--amber);
  border: 1px solid rgba(255, 209, 102, 0.45);
  white-space: nowrap;
}

.page-about .panel__body {
  padding-top: clamp(16px, 2.2vw, 24px);
}

.page-about .panel__foot {
  margin-top: clamp(16px, 2.2vw, 24px);
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .panel__foot p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-lede {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 流程 ---------- */
.page-about .flow-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05);
}

.page-about .flow-figure__cap {
  padding: 8px 12px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--sage);
  background: rgba(11, 31, 26, 0.6);
}

.page-about .process {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .process__item {
  position: relative;
  padding: 15px 16px 15px 46px;
  background: rgba(11, 31, 26, 0.52);
  border-left: 2px solid rgba(198, 255, 61, 0.55);
}

.page-about .process__num {
  position: absolute;
  left: 14px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--amber);
}

.page-about .process__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .process__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--sage);
}

@media (min-width: 720px) {
  .page-about .process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .team__ring {
  display: block;
  width: 100%;
  max-width: 240px;
  margin: 0 auto;
}

.page-about .ring-seg {
  transition: stroke-width var(--dur) var(--ease);
}

.page-about .team__ring:hover .ring-seg--edit,
.page-about .team__ring:hover .ring-seg--eng {
  stroke-width: 17;
}

.page-about .ring-total {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  fill: var(--mist);
}

.page-about .ring-unit {
  font-family: var(--font-body);
  font-size: 9px;
  letter-spacing: 0.12em;
  fill: var(--sage);
}

.page-about .team__legend {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .team__legend-item {
  display: grid;
  grid-template-columns: 10px 1fr auto;
  align-items: center;
  gap: 4px 10px;
  padding: 12px 14px;
  background: rgba(11, 31, 26, 0.5);
  border: 1px solid var(--line-soft);
}

.page-about .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: block;
}

.page-about .dot--lime {
  background: var(--lime);
}

.page-about .dot--amber {
  background: var(--amber);
}

.page-about .team__legend-name {
  font-size: 0.9rem;
  color: var(--mist);
}

.page-about .team__legend-num {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--lime);
}

.page-about .team__legend-desc {
  grid-column: 2 / -1;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--sage);
}

@media (min-width: 760px) {
  .page-about .team {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 40px);
  }
}

/* ---------- 板块覆盖（靛紫带） ---------- */
.page-about .about-coverage {
  padding: clamp(24px, 3.4vw, 40px) 0;
  border-top: 1px solid rgba(232, 242, 236, 0.14);
  border-bottom: 1px solid rgba(232, 242, 236, 0.14);
}

.page-about .about-coverage .theme-band__inner {
  padding: 0 clamp(16px, 5vw, 34px);
}

.page-about .coverage__head {
  display: grid;
  gap: 6px;
}

.page-about .about-coverage .theme-band__label {
  margin: 0;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 242, 236, 0.7);
}

.page-about .about-coverage .theme-band__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
}

.page-about .about-coverage .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-about .about-coverage .filter-bar__btn {
  padding: 6px 12px;
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: rgba(232, 242, 236, 0.82);
  background: rgba(11, 31, 26, 0.35);
  border: 1px solid rgba(232, 242, 236, 0.24);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-coverage .filter-bar__btn:hover,
.page-about .about-coverage .filter-bar__btn:focus-visible {
  border-color: var(--lime);
  color: #fff;
}

.page-about .about-coverage .filter-bar__btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 600;
}

.page-about .coverage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 18px;
}

.page-about .coverage__cell {
  padding: 15px 16px;
  background: rgba(11, 31, 26, 0.5);
  border: 1px solid rgba(232, 242, 236, 0.16);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .coverage__cell:hover {
  border-color: rgba(198, 255, 61, 0.5);
  background: rgba(11, 31, 26, 0.68);
}

.page-about .coverage__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-about .coverage__text {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: rgba(232, 242, 236, 0.78);
}

@media (min-width: 760px) {
  .page-about .coverage__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .coverage__cell:nth-child(1) { grid-column: span 3; }
  .page-about .coverage__cell:nth-child(2) { grid-column: span 3; }
  .page-about .coverage__cell:nth-child(3) { grid-column: span 2; }
  .page-about .coverage__cell:nth-child(4) { grid-column: span 4; }
  .page-about .coverage__cell:nth-child(5) { grid-column: span 4; }
  .page-about .coverage__cell:nth-child(6) { grid-column: span 2; }
}

/* ---------- 版本演进 ---------- */
.page-about .versions__banner {
  margin: 0 0 20px;
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .versions__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  opacity: 0.72;
  filter: saturate(0.75);
}

.page-about .versions {
  position: relative;
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .versions::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), rgba(255, 209, 102, 0.4), rgba(198, 255, 61, 0.1));
}

.page-about .versions__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(11, 31, 26, 0.5);
  border: 1px solid var(--line-soft);
}

.page-about .versions__item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 18px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--amber);
}

.page-about .versions__item--now {
  border-color: rgba(198, 255, 61, 0.45);
  background: rgba(198, 255, 61, 0.07);
}

.page-about .versions__item--now::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.14);
}

.page-about .versions__year {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-about .versions__title {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .versions__text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--sage);
}

@media (min-width: 720px) {
  .page-about .versions__item {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

  .page-about .versions__year {
    padding-top: 1px;
  }
}

/* ---------- 数据与校对（酒红带） ---------- */
.page-about .about-sources {
  padding: clamp(24px, 3.4vw, 40px) 0;
  border-top: 1px solid rgba(232, 242, 236, 0.14);
  border-bottom: 1px solid rgba(232, 242, 236, 0.14);
}

.page-about .about-sources .theme-band__inner {
  padding: 0 clamp(16px, 5vw, 34px);
}

.page-about .about-sources .theme-band__label {
  margin: 0;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 242, 236, 0.7);
}

.page-about .about-sources .theme-band__title {
  margin: 6px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
}

.page-about .sources__grid {
  display: grid;
  gap: 22px;
}

.page-about .sources__lede {
  margin: 0 0 14px;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(232, 242, 236, 0.85);
}

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

.page-about .sources__item {
  position: relative;
  padding-left: 16px;
  font-size: 0.85rem;
  line-height: 1.72;
  color: rgba(232, 242, 236, 0.72);
}

.page-about .sources__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--amber);
}

.page-about .sources__nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .sources__num-card {
  padding: 12px 13px;
  background: rgba(11, 31, 26, 0.45);
  border-top: 2px solid rgba(255, 209, 102, 0.75);
}

.page-about .sources__num-card dt {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(232, 242, 236, 0.65);
  line-height: 1.4;
}

.page-about .sources__num-card dd {
  margin: 6px 0 0;
  font-size: clamp(1.1rem, 2.8vw, 1.5rem);
  font-weight: 600;
  color: var(--amber);
  line-height: 1.15;
}

@media (min-width: 820px) {
  .page-about .sources__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(24px, 3.4vw, 44px);
    align-items: start;
  }
}

/* ---------- 呈现原则 ---------- */
.page-about .principles {
  display: grid;
  gap: 12px;
}

.page-about .principles__item {
  position: relative;
  padding: 16px 16px 16px 52px;
  background: rgba(11, 31, 26, 0.5);
  border: 1px solid var(--line-soft);
}

.page-about .principles__idx {
  position: absolute;
  left: 14px;
  top: 15px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--lime);
}

.page-about .principles__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .principles__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--sage);
}

.page-about .about-actions {
  display: grid;
  gap: 12px;
}

.page-about .about-actions__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-actions__btns .btn {
  text-decoration: none;
}

@media (min-width: 760px) {
  .page-about .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  display: grid;
  gap: 12px;
  padding: 18px 18px 20px;
  background: var(--paper);
  border-left: 3px solid var(--orange);
}

.page-about .about-close__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .about-close__link {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 31, 26, 0.35);
  padding-bottom: 2px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-close__link:hover,
.page-about .about-close__link:focus-visible {
  color: var(--wine);
  border-bottom-color: var(--wine);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-about .about-stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-stat__num {
    white-space: normal;
  }

  .page-about .panel__badge {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail__link,
  .page-about .rail__link::before,
  .page-about .ring-seg,
  .page-about .coverage__cell,
  .page-about .about-coverage .filter-bar__btn,
  .page-about .about-close__link {
    transition: none;
  }
}
<<<END>>>