.page-about {
  --ab-track: rgba(169, 183, 177, 0.16);
  --ab-panel: rgba(18, 54, 44, 0.62);
  --ab-rule: rgba(53, 242, 192, 0.22);
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

.page-about .about-shell {
  width: var(--shell);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 0 0 22px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .breadcrumb-list > li {
  display: inline-flex;
  align-items: center;
}

.page-about .breadcrumb-list > li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--mint-dim);
}

.page-about .breadcrumb-list a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .breadcrumb-list a:hover {
  color: var(--mint);
}

.page-about .breadcrumb-list [aria-current="page"] {
  color: var(--orange-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(44px, 6vw, 80px);
  background:
    radial-gradient(110% 90% at 90% -10%, rgba(26, 143, 120, 0.34), transparent 60%),
    linear-gradient(168deg, var(--deep) 0%, var(--ink) 66%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.5;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 76%);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 52px);
  align-items: start;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 7.4vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--mint);
}

.page-about .about-lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-facts > li {
  background: rgba(14, 42, 34, 0.72);
  padding: 16px 18px 18px;
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--mint);
}

.page-about .fact-num--orange {
  color: var(--orange);
}

.page-about .fact-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-mint);
  background: var(--deep-2);
  overflow: hidden;
  aspect-ratio: 5 / 6;
}

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

.page-about .about-hero-figure figcaption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--glass-strong);
  border: 1px solid var(--line-mint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--mint);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 100px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec-head {
  max-width: 780px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-sec-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 4.2vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-sec-lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: var(--ink);
}

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

.page-about .about-origin-quote {
  border-left: 2px solid var(--mint);
  padding-left: 22px;
}

.page-about .about-origin-quote .serif-lead {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(21px, 2.7vw, 29px);
  line-height: 1.55;
  color: var(--paper);
}

.page-about .about-origin-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-origin-body h2 {
  display: none;
}

.page-about .about-origin-body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--paper);
}

.page-about .about-tick-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-tick-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-tick-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(53, 242, 192, 0.13);
}

/* ---------- 三线流程 ---------- */
.page-about .about-flow {
  background:
    linear-gradient(180deg, var(--ink) 0%, var(--deep) 26%, var(--deep) 74%, var(--ink) 100%);
}

.page-about .about-flow-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--deep-2);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

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

.page-about .about-flow-media figcaption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--glass-strong);
  border: 1px solid var(--line-mint);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--mint);
}

.page-about .about-flow-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  background: var(--ab-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .flow-step:hover {
  border-color: var(--line-mint);
  transform: translateY(-2px);
}

.page-about .step-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-about .flow-step h3 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.28;
  color: var(--white);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 里程碑时间线 ---------- */
.page-about .about-milestones {
  background: var(--ink);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--mint), var(--mint-dim) 45%, rgba(53, 242, 192, 0.06) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 46px;
}

.page-about .tl-marker {
  position: absolute;
  left: 0;
  top: 6px;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--deep);
  border: 1px solid var(--line-mint);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mint);
}

.page-about .tl-body {
  background: linear-gradient(135deg, var(--ab-panel), rgba(11, 15, 14, 0.86));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
}

.page-about .tl-stage {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--orange-soft);
}

.page-about .tl-body h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 25px);
  line-height: 1.24;
  color: var(--white);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .tl-strip {
  display: flex;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .tl-strip .tag {
  flex: 0 0 auto;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-mint);
  background: rgba(53, 242, 192, 0.08);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--mint);
  white-space: nowrap;
}

.page-about .tl-strip .tag--muted {
  border-color: var(--line);
  background: transparent;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-team-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(18, 54, 44, 0.8), rgba(11, 15, 14, 0.92));
  padding: 24px 20px 22px;
}

.page-about .about-team-chart {
  position: relative;
  width: min(100%, 260px);
  margin: 0 auto;
}

.page-about .ab-ring {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ring-seg {
  stroke-linecap: butt;
  transition: stroke-width 0.2s var(--ease);
  cursor: default;
}

.page-about .ring-seg:hover {
  stroke-width: 24;
}

.page-about .ring-seg--tech { stroke: var(--mint); }
.page-about .ring-seg--edit { stroke: var(--mint-dim); }
.page-about .ring-seg--data { stroke: var(--orange); }
.page-about .ring-seg--video { stroke: var(--orange-soft); }

.page-about .chart-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  pointer-events: none;
}

.page-about .chart-center span {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--white);
}

.page-about .about-team-legend {
  display: grid;
  gap: 2px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--mist);
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .legend-row:hover {
  background: rgba(53, 242, 192, 0.07);
  color: var(--white);
}

.page-about .legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex: 0 0 auto;
}

.page-about .legend-row--tech .legend-dot { background: var(--mint); }
.page-about .legend-row--edit .legend-dot { background: var(--mint-dim); }
.page-about .legend-row--data .legend-dot { background: var(--orange); }
.page-about .legend-row--video .legend-dot { background: var(--orange-soft); }

.page-about .legend-role {
  flex: 1 1 auto;
}

.page-about .legend-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-team-media {
  margin: 0;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--deep-2);
}

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

.page-about .about-team-text {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-partner-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-partner-list li {
  background: rgba(14, 42, 34, 0.7);
  padding: 16px 16px 18px;
}

.page-about .partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--mint);
}

.page-about .partner-label {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  background:
    radial-gradient(80% 70% at 12% 0%, rgba(26, 143, 120, 0.22), transparent 62%),
    var(--ink);
}

.page-about .about-honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .honor {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ab-panel);
  padding: 0;
  overflow: hidden;
}

.page-about .honor summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  transition: background 0.18s var(--ease);
}

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

.page-about .honor summary:hover {
  background: rgba(53, 242, 192, 0.06);
}

.page-about .honor-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--white);
}

.page-about .honor-year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange-soft);
  border: 1px solid rgba(255, 179, 138, 0.4);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}

.page-about .honor summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mint);
}

.page-about .honor[open] summary::after {
  content: "−";
}

.page-about .honor p {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-score {
  border: 1px solid var(--line-mint);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(53, 242, 192, 0.10), rgba(11, 15, 14, 0.9));
  padding: 22px 22px 24px;
}

.page-about .score-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 9vw, 64px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mint);
}

.page-about .score-unit {
  font-size: 0.42em;
  color: var(--mist);
  margin-left: 6px;
}

.page-about .score-note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 合作入口 ---------- */
.page-about .about-cta {
  padding: clamp(52px, 8vw, 96px) 0;
  background: var(--ink);
}

.page-about .about-cta-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line-mint);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 122, 61, 0.16), transparent 58%),
    linear-gradient(150deg, var(--deep-2), rgba(11, 15, 14, 0.95));
}

.page-about .about-cta-copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.8vw, 38px);
  line-height: 1.16;
  color: var(--white);
}

.page-about .about-cta-copy p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-self: center;
}

.page-about .about-cta-foot {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-cta-foot a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 192, 0.35);
}

.page-about .about-cta-foot a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-score {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 24px;
    align-items: center;
  }

  .page-about .score-note {
    margin: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-hero-figure {
    aspect-ratio: auto;
    align-self: stretch;
    max-height: 620px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(36px, 6vw, 84px);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 48px);
    align-items: start;
  }

  .page-about .about-cta-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .tl-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    padding-left: 56px;
  }

  .page-about .tl-body {
    padding: 24px 26px 26px;
  }

  .page-about .about-timeline::before {
    left: 17px;
  }

  .page-about .tl-marker {
    width: 35px;
    height: 35px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-step,
  .page-about .ring-seg,
  .page-about .legend-row,
  .page-about .honor summary,
  .page-about .breadcrumb-list a {
    transition: none;
  }

  .page-about .flow-step:hover {
    transform: none;
  }
}
<<<END>>>