.page-about {
  --about-radius: 28px;
  --about-grid: rgba(30, 58, 92, 0.32);
  padding-bottom: 64px;
}

/* ---------- 通用 ---------- */
.page-about .about-sec {
  padding: 34px 0;
}

.page-about .about-sec-head {
  margin-bottom: 24px;
}

.page-about .about-no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin: 0 0 8px;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0;
  font-weight: 800;
}

.page-about .about-sub {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
  max-width: 38em;
}

.page-about .about-cap {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--mute);
  letter-spacing: 0.02em;
}

.page-about .prose {
  font-size: 15px;
  line-height: 1.82;
  color: var(--mute);
  margin: 14px 0 0;
  max-width: 44em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  padding: 18px 0 28px;
  position: relative;
}

.page-about .about-hero-main h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: var(--paper);
  margin: 0 0 0;
}

.page-about .about-lede {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 41em;
}

.page-about .about-hero .cluster {
  margin-top: 22px;
}

.page-about .about-dossier {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: linear-gradient(158deg, #0F2038 0%, #0A1526 100%);
  padding: 4px 20px;
  overflow: hidden;
}

.page-about .about-dossier::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--sky) 55%, transparent);
}

.page-about .dossier-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(30, 58, 92, 0.68);
}

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

.page-about .dossier-key {
  font-size: 13px;
  color: var(--mute);
}

.page-about .dossier-val {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* ---------- 01 简介 ---------- */
.page-about .about-split {
  display: grid;
  gap: 26px;
}

.page-about .about-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(30, 58, 92, 0.8);
  display: grid;
  gap: 10px;
}

.page-about .about-facts li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--paper);
}

.page-about .about-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
  aspect-ratio: 14 / 9;
}

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

/* ---------- 02 时间轴 ---------- */
.page-about .about-board {
  border: 1px solid rgba(30, 58, 92, 0.75);
  border-radius: var(--about-radius);
  padding: 24px 16px;
  background-image:
    linear-gradient(180deg, rgba(15, 32, 56, 0.7), rgba(8, 17, 31, 0.35)),
    repeating-linear-gradient(0deg, var(--about-grid) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, var(--about-grid) 0 1px, transparent 1px 24px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 22px;
  position: relative;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(18, 224, 196, 0.6), rgba(30, 58, 92, 0.35) 52%, rgba(255, 176, 32, 0.5));
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 30px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--steel);
  box-shadow: 0 0 0 4px rgba(18, 224, 196, 0.1);
  transition: background 0.24s var(--ease);
}

.page-about .about-timeline > li:hover::before {
  background: var(--cyan);
}

.page-about .tl-item {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(15, 32, 56, 0.78);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .tl-item[open] {
  border-color: rgba(18, 224, 196, 0.48);
  background: rgba(15, 32, 56, 0.94);
}

.page-about .tl-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-num {
  font-family: var(--mono);
  font-size: clamp(40px, 9vw, 96px);
  line-height: 0.82;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(143, 176, 204, 0.55);
}

.page-about .tl-item[open] .tl-num {
  -webkit-text-stroke-color: var(--cyan);
}

.page-about .tl-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .tl-phase {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .tl-lead {
  font-size: 15px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-flag {
  display: none;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 4px 12px;
  white-space: nowrap;
}

.page-about .tl-flag::after {
  content: "展开";
}

.page-about .tl-item[open] .tl-flag {
  border-color: rgba(18, 224, 196, 0.42);
  color: var(--cyan);
}

.page-about .tl-item[open] .tl-flag::after {
  content: "收起";
}

.page-about .tl-detail {
  padding: 0 18px 20px;
}

.page-about .tl-detail p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 46em;
}

.page-about .tl-detail .tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-detail .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--paper);
  border: 1px solid rgba(30, 58, 92, 0.9);
  background: rgba(44, 83, 120, 0.28);
  border-radius: var(--r-pill);
  padding: 4px 12px;
}

/* 里程碑条带 */
.page-about .about-milestones-wrap {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed rgba(30, 58, 92, 0.9);
}

.page-about .about-milestones {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .milestone {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(8, 17, 31, 0.82);
  font-size: 13px;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .milestone .mono {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .milestone:nth-child(even) .mono {
  color: var(--gold);
}

.page-about .scroll-hint {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.page-about .about-archive-figure {
  margin: 22px 0 0;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-800);
  aspect-ratio: 3 / 2;
}

.page-about .about-archive-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: rgba(15, 32, 56, 0.7);
  padding: 20px 20px 22px;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .team-card:hover {
  border-color: rgba(18, 224, 196, 0.42);
  transform: translateY(-2px);
}

.page-about .team-bar {
  height: 3px;
  border-radius: var(--r-pill);
  background: rgba(30, 58, 92, 0.85);
  overflow: hidden;
  margin-bottom: 18px;
}

.page-about .team-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--sky));
}

.page-about .team-card--versions .team-bar span {
  width: 33.3%;
}

.page-about .team-card--data .team-bar span {
  width: 37.5%;
}

.page-about .team-card--content .team-bar span {
  width: 29.2%;
}

.page-about .team-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mute);
  margin: 0;
}

.page-about .team-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
  margin: 6px 0 0;
}

.page-about .team-count {
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  margin: 10px 0 12px;
}

.page-about .team-count span {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--mute);
  margin-left: 5px;
}

.page-about .team-desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--mute);
  margin: 0 0 16px;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid rgba(30, 58, 92, 0.8);
  display: grid;
  gap: 9px;
}

.page-about .team-list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 04 流程 ---------- */
.page-about .about-process {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--ink-800);
  padding: 26px 18px;
}

.page-about .process-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .process-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(0.65);
}

.page-about .process-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, rgba(8, 17, 31, 0.95) 32%, rgba(8, 17, 31, 0.62) 100%);
}

.page-about .process-inner {
  position: relative;
  z-index: 1;
}

.page-about .process-steps {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .step {
  border: 1px solid rgba(30, 58, 92, 0.95);
  border-radius: 16px;
  background: rgba(8, 17, 31, 0.78);
  padding: 16px 18px;
}

.page-about .step-no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin: 0;
}

.page-about .step h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
  margin: 7px 0 8px;
}

.page-about .step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------- 05 数据与合作 ---------- */
.page-about .about-data-grid {
  display: grid;
  gap: 16px;
}

.page-about .panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 22px 20px 24px;
}

.page-about .panel--cyan {
  border-color: rgba(18, 224, 196, 0.28);
  background: linear-gradient(152deg, rgba(18, 224, 196, 0.14), rgba(15, 32, 56, 0.92) 58%);
}

.page-about .panel--gold {
  border-color: rgba(255, 176, 32, 0.26);
  background: linear-gradient(152deg, rgba(255, 176, 32, 0.13), rgba(15, 32, 56, 0.92) 58%);
}

.page-about .panel h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-about .panel > p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
  margin: 0 0 18px;
}

.page-about .panel-stats {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .panel-stats li {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .panel-stats .mono {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .panel--gold .panel-stats .mono {
  color: var(--gold);
}

/* ---------- 06 地区与联系 ---------- */
.page-about .about-contact {
  display: grid;
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: 24px 18px;
  background: linear-gradient(125deg, rgba(15, 32, 56, 0.92), rgba(8, 17, 31, 0.96));
}

.page-about .about-contact .btn {
  margin-top: 20px;
}

.page-about .contact-slab {
  border: 1px solid rgba(255, 176, 32, 0.26);
  border-radius: 18px;
  background: rgba(8, 17, 31, 0.62);
  padding: 18px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .contact-line {
  display: grid;
  gap: 3px;
}

.page-about .contact-line .k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .contact-line .v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-about .contact-line .v a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: rgba(77, 210, 255, 0.55);
  text-underline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-sec {
    padding: 44px 0;
  }

  .page-about .tl-flag {
    display: inline-block;
  }

  .page-about .tl-summary {
    grid-template-columns: auto 1fr auto;
    gap: 20px;
    padding: 18px 22px;
  }

  .page-about .tl-detail {
    padding: 0 22px 24px;
  }

  .page-about .about-process {
    padding: 34px 28px;
  }

  .page-about .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-contact {
    padding: 30px 26px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 88px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.84fr);
    gap: 52px;
    align-items: start;
    padding: 34px 0 44px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-board {
    padding: 34px 30px;
  }

  .page-about .about-team {
    grid-template-columns: 0.94fr 1.16fr 0.94fr;
    align-items: start;
  }

  .page-about .about-data-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 44px;
    padding: 38px 34px;
  }

  .page-about .tl-summary {
    padding: 20px 26px;
  }

  .page-about .tl-detail {
    padding: 0 26px 26px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-main h1 {
    letter-spacing: -0.035em;
  }

  .page-about .panel {
    padding: 28px 26px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .tl-item,
  .page-about .about-timeline > li::before {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}
<<<END>>>