.page-about {
  --abx-idx: 200px;
  --abx-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
  display: block;
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 52px;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(120% 86% at 84% 0%, rgba(28, 92, 70, .5) 0%, rgba(11, 15, 13, 0) 62%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(42, 58, 49, .5) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(42, 58, 49, .34) 0 1px, transparent 1px 84px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--paper);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  position: relative;
  border: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(16, 54, 42, .5), rgba(18, 24, 20, .92));
  box-shadow: var(--abx-shadow);
  padding: 24px 20px 20px;
}

.page-about .about-hero__panel::after {
  content: "速览";
  position: absolute;
  top: -11px;
  left: 16px;
  background: var(--paper);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: .16em;
  line-height: 1.5;
  padding: 1px 8px;
}

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

.page-about .about-glance li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--rule);
}

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

.page-about .about-glance__no {
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1.2;
  color: var(--lime);
  letter-spacing: .04em;
}

.page-about .about-glance__k {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  line-height: 1.4;
}

.page-about .about-glance__v {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: 40px;
  padding-top: 48px;
}

.page-about .about-index__head {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--text-dim);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 4px;
  border-left: 0;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--rule);
  background: var(--ink-2);
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}

.page-about .about-index__no {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-dim);
  transition: color .16s ease;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--arena-2);
  background: var(--arena);
  color: var(--paper);
  outline: none;
}

.page-about .about-index a:hover .about-index__no,
.page-about .about-index a:focus-visible .about-index__no {
  color: var(--lime);
}

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

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-about .about-sec + .about-sec {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--rule);
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .about-sec__no {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--lime);
  border: 1px solid var(--rule);
  background: var(--ink-2);
  padding: 2px 9px;
  line-height: 1.5;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 33px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-sec p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-sec p:last-child {
  margin-bottom: 0;
}

.page-about .about-sec a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-sec a:hover,
.page-about .about-sec a:focus-visible {
  color: var(--paper);
}

.page-about .about-prose {
  max-width: 70ch;
}

.page-about .about-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 68ch;
}

.page-about .about-lead--wide {
  max-width: 76ch;
  margin-bottom: 26px;
}

.page-about .about-tail {
  margin-top: 28px !important;
  padding-left: 16px;
  border-left: 2px solid var(--arena-2);
  color: var(--text-dim) !important;
  font-size: 15px !important;
}

/* ---------- 网格 ---------- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  border: 1px solid var(--rule);
  background: var(--ink-2);
  box-shadow: var(--abx-shadow);
  padding: 20px 20px 22px;
}

.page-about .about-note__title {
  margin: 0 0 12px !important;
  font-size: 12px !important;
  letter-spacing: .16em;
  color: var(--lime) !important;
  line-height: 1.5 !important;
}

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

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

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--arena-2);
}

.page-about .about-note__body {
  margin: 0 0 12px !important;
  font-size: 14px !important;
  line-height: 1.75 !important;
  color: var(--text-dim) !important;
}

.page-about .about-note__body:last-child {
  margin-bottom: 0 !important;
}

/* ---------- 图片 ---------- */
.page-about .about-fig {
  margin: 0;
}

.page-about .about-fig--wide {
  margin-bottom: 28px;
}

.page-about .about-fig .figure__media {
  overflow: hidden;
  border: 1px solid var(--rule);
  background: var(--ink-2);
}

.page-about .about-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

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

.page-about .about-fig--tall img {
  aspect-ratio: 9 / 11;
}

.page-about .about-fig--map img {
  aspect-ratio: 3 / 2;
}

.page-about .about-fig .figure__cap {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 流程步骤 ---------- */
.page-about .flow {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .flow__step {
  position: relative;
  border: 1px solid var(--rule);
  background: var(--ink-2);
  padding: 18px 18px 16px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.page-about .flow__step:hover,
.page-about .flow__step:focus {
  transform: translateY(-4px);
  box-shadow: var(--abx-shadow);
  border-color: var(--arena-2);
}

.page-about .flow__step:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .flow__no {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink);
  background: var(--paper);
  padding: 2px 7px;
  margin-bottom: 10px;
  line-height: 1.5;
}

.page-about .flow__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .flow__desc {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.7 !important;
  color: var(--text) !important;
}

.page-about .flow__more {
  margin: 0 !important;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px !important;
  line-height: 1.7 !important;
  color: var(--text-dim) !important;
  transition: max-height .26s ease, opacity .2s ease, margin .26s ease;
}

.page-about .flow__step:hover .flow__more,
.page-about .flow__step:focus .flow__more,
.page-about .flow__step:focus-within .flow__more {
  max-height: 260px;
  opacity: 1;
  margin-top: 10px !important;
}

/* ---------- 字段表 ---------- */
.page-about .field-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 32px;
  font-size: 15px;
}

.page-about .field-table caption {
  text-align: left;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--text-dim);
  padding-bottom: 10px;
}

.page-about .field-table th,
.page-about .field-table td {
  text-align: left;
  padding: 11px 13px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  line-height: 1.7;
}

.page-about .field-table thead th {
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  border-bottom-color: var(--paper);
}

.page-about .field-table tbody th {
  width: 32%;
  color: var(--paper);
  font-weight: 600;
}

.page-about .field-table tbody td {
  color: var(--text-dim);
}

.page-about .field-table tbody tr {
  transition: background .16s ease;
}

.page-about .field-table tbody tr:hover {
  background: rgba(28, 92, 70, .24);
}

/* ---------- 团队 ---------- */
.page-about .crew {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .crew__item {
  display: grid;
  gap: 9px;
}

.page-about .crew__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .crew__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .crew__count {
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--lime);
}

.page-about .crew__count small {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 3px;
}

.page-about .crew__track {
  height: 6px;
  background: var(--ink-2);
  border: 1px solid var(--rule);
}

.page-about .crew__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--arena-2), var(--lime));
}

.page-about .crew__fill--1 { width: 100%; }
.page-about .crew__fill--2 { width: 54%; }
.page-about .crew__fill--3 { width: 35%; }
.page-about .crew__fill--4 { width: 23%; }

.page-about .crew__desc {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.75 !important;
  color: var(--text-dim) !important;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: 54px 18px minmax(0, 1fr);
  gap: 0 10px;
  padding-bottom: 22px;
}

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

.page-about .tl__year {
  font-family: var(--font-num);
  font-size: 19px;
  line-height: 1.3;
  color: var(--lime);
  letter-spacing: .03em;
  padding-top: 9px;
}

.page-about .tl__rail {
  position: relative;
  display: block;
}

.page-about .tl__rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 16px;
  bottom: -22px;
  width: 1px;
  background: var(--rule);
  transform: translateX(-50%);
}

.page-about .tl__item:last-child .tl__rail::before {
  display: none;
}

.page-about .tl__dot {
  position: absolute;
  left: 50%;
  top: 13px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--arena-2);
  border: 1px solid var(--rule);
  transform: translateX(-50%);
  transition: background .16s ease, box-shadow .16s ease;
}

.page-about .tl__body {
  border: 1px solid transparent;
  padding: 9px 14px 11px;
  transition: border-color .16s ease, background .16s ease;
}

.page-about .tl__item:hover .tl__body,
.page-about .tl__item:focus .tl__body,
.page-about .tl__item:focus-within .tl__body {
  border-color: var(--rule);
  background: var(--ink-2);
}

.page-about .tl__item:hover .tl__dot,
.page-about .tl__item:focus .tl__dot {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 61, .18);
}

.page-about .tl__item:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl__body p {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.75 !important;
  color: var(--text-dim) !important;
}

/* ---------- 准确性清单 ---------- */
.page-about .qa-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--rule);
}

.page-about .qa-list__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  transition: background .16s ease;
}

.page-about .qa-list__item:hover {
  background: rgba(16, 54, 42, .32);
}

.page-about .qa-list__no {
  font-family: var(--font-num);
  font-size: 17px;
  line-height: 1.4;
  color: var(--arena-2);
  letter-spacing: .06em;
  transition: color .16s ease;
}

.page-about .qa-list__item:hover .qa-list__no {
  color: var(--lime);
}

.page-about .qa-list__t {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .qa-list__item p {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.8 !important;
  color: var(--text) !important;
  max-width: 72ch;
}

/* ---------- 资质戳 ---------- */
.page-about .about-stamp {
  margin-top: 20px;
  border: 1px solid var(--rule);
  background: var(--arena);
  padding: 16px 18px;
}

.page-about .about-stamp__k {
  margin: 0 !important;
  font-size: 12px !important;
  letter-spacing: .16em;
  color: rgba(214, 221, 214, .72) !important;
  line-height: 1.6 !important;
}

.page-about .about-stamp__v {
  margin: 2px 0 12px !important;
  font-family: var(--font-num);
  font-size: 17px !important;
  line-height: 1.5 !important;
  color: var(--paper) !important;
  letter-spacing: .02em;
}

.page-about .about-stamp__v:last-child {
  margin-bottom: 0 !important;
}

/* ---------- 页尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 56px;
  padding: 34px 22px 36px;
  border: 1px solid var(--rule);
  background:
    linear-gradient(120deg, rgba(16, 54, 42, .78) 0%, rgba(18, 24, 20, .92) 68%),
    var(--ink-2);
  box-shadow: var(--abx-shadow);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  max-width: 62ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero {
    padding: 40px 0 64px;
  }

  .page-about .about-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-grid__main {
    grid-column: span 7;
  }

  .page-about .about-grid__side {
    grid-column: span 5;
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-sec + .about-sec {
    margin-top: 72px;
    padding-top: 60px;
  }
}

/* ---------- 桌面分栏 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-body {
    grid-template-columns: var(--abx-idx) minmax(0, 1fr);
    gap: 56px;
    padding-top: 64px;
  }

  .page-about .about-index ol {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    border-left: 1px solid var(--rule);
  }

  .page-about .about-index a {
    display: block;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 9px 0 9px 15px;
    margin-left: -1px;
    color: var(--text-dim);
    font-size: 14px;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    background: transparent;
    border-left-color: var(--arena-2);
    color: var(--paper);
  }

  .page-about .about-index__inner {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-about .about-index__no {
    display: inline;
    margin-right: 8px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 1280px) {
  .page-about {
    --abx-idx: 220px;
  }

  .page-about .about-cta {
    padding: 44px 40px 46px;
  }
}

/* ---------- 窄屏守则 ---------- */
@media (max-width: 420px) {
  .page-about .about-sec__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-sec__no {
    justify-self: start;
  }

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

  .page-about .tl__item {
    grid-template-columns: 46px 14px minmax(0, 1fr);
    gap: 0 8px;
  }

  .page-about .tl__year {
    font-size: 16px;
  }

  .page-about .tl__body {
    padding: 9px 10px 11px;
  }
}
<<<END>>>