.page-about {
  --about-line: rgba(232, 237, 243, 0.13);
  --about-line-soft: rgba(232, 237, 243, 0.07);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 4.6vw, 2.6rem) 0 clamp(2.2rem, 5vw, 3.6rem);
  background:
    radial-gradient(115% 88% at 94% -8%, rgba(30, 107, 255, 0.34), rgba(30, 107, 255, 0) 62%),
    radial-gradient(80% 70% at -12% 108%, rgba(255, 122, 26, 0.18), rgba(255, 122, 26, 0) 66%),
    linear-gradient(164deg, var(--ink) 0%, var(--ink-2) 56%, var(--ink-3) 100%);
  color: var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -26%;
  width: 72vw;
  height: 72vw;
  background: conic-gradient(from 205deg at 50% 50%, rgba(56, 214, 255, 0.16), rgba(255, 122, 26, 0.13), rgba(30, 107, 255, 0) 56%);
  transform: rotate(-14deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(30, 107, 255, 0), var(--blue), var(--orange), rgba(255, 122, 26, 0));
  opacity: 0.7;
}

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

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
  align-items: end;
  margin-top: clamp(1.2rem, 3.4vw, 2rem);
}

.page-about .about-h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 0;
  color: var(--paper);
}

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

.page-about .about-lede {
  max-width: 48ch;
  margin: 1.1rem 0 0;
  color: var(--text-soft);
  line-height: 1.78;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-about .about-coord {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.85rem, 2vw, 1.2rem);
  padding: clamp(1rem, 2.8vw, 1.5rem);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(11, 15, 20, 0.55);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-about .about-coord::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(56, 214, 255, 0));
}

.page-about .coord-item {
  border-top: 1px solid var(--about-line-soft);
  padding-top: 0.7rem;
}

.page-about .coord-num {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.6vw, 1.9rem);
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .coord-num em {
  font-style: normal;
  color: var(--orange);
}

.page-about .coord-label {
  margin: 0.25rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--ink-3) 0%, var(--ink) 100%);
  color: var(--paper);
}

.page-about .about-banner {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: flex-end;
  min-height: 240px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-banner img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-about .about-banner-veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(175deg, rgba(11, 15, 20, 0.3) 0%, rgba(11, 15, 20, 0.94) 78%);
}

.page-about .about-banner-text {
  padding: clamp(1.1rem, 3.6vw, 2.4rem);
  max-width: 62ch;
}

.page-about .about-banner-text h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.6vw, 2.8rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0.4rem 0 0;
  color: var(--paper);
}

.page-about .tl-layout {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .tl-scale {
  display: none;
}

.page-about .tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(0.7rem, 2vw, 0.95rem);
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--cyan) 48%, var(--orange));
  opacity: 0.5;
}

.page-about .tl-item {
  position: relative;
  padding-left: 2rem;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 3px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, 0.16);
}

.page-about .tl-disc {
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(17, 27, 46, 0.72);
  overflow: hidden;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .tl-disc:hover {
  border-color: rgba(30, 107, 255, 0.62);
  box-shadow: var(--shadow-1);
}

.page-about .tl-disc[open] {
  border-color: rgba(30, 107, 255, 0.72);
}

.page-about .tl-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem clamp(0.85rem, 2.4vw, 1.25rem);
  list-style: none;
  cursor: pointer;
}

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

.page-about .tl-summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 1.3rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--orange);
}

.page-about .tl-disc[open] .tl-summary::after {
  content: "\2013";
}

.page-about .tl-year {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .tl-title {
  flex: 1 1 10rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.6vw, 1.32rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl-body {
  padding: 0 clamp(0.85rem, 2.4vw, 1.25rem) 1.1rem;
  color: var(--text-soft);
  font-size: 0.94rem;
  line-height: 1.78;
}

.page-about .tl-body p {
  margin: 0 0 0.65rem;
}

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

/* ---------- 四类路径 ---------- */
.page-about .about-paths {
  background: var(--mist);
}

.page-about .about-paths .filter-bar {
  margin: 1.4rem 0 0.6rem;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-about .about-paths .filter-status {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--graphite);
  margin: 0 0 1.3rem;
}

.page-about .paths-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.9rem, 2.4vw, 1.15rem);
}

.page-about .path-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.05rem, 3vw, 1.5rem);
  border-left: 2px solid var(--orange);
}

.page-about .path-kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--blue-deep);
  margin: 0;
}

.page-about .path-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}

.page-about .path-text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-on-light);
}

.page-about .path-list {
  margin: 0.1rem 0 0.4rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.page-about .path-list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-on-light);
}

.page-about .path-list li::before {
  content: "";
  position: absolute;
  top: 0.6em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--blue);
}

.page-about .path-card .link-arrow {
  margin-top: auto;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(150deg, var(--ink-2) 0%, var(--ink) 72%);
  color: var(--paper);
}

.page-about .team-split {
  display: grid;
  gap: clamp(1.4rem, 3.6vw, 2.4rem);
  margin-top: clamp(1.2rem, 3.4vw, 2rem);
  align-items: start;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

.page-about .team-figure .media-caption {
  display: block;
  margin-top: 0.7rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-mute);
}

.page-about .team-rows {
  display: grid;
  gap: clamp(0.85rem, 2.2vw, 1.15rem);
}

.page-about .team-row {
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--about-line-soft);
}

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

.page-about .team-row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
}

.page-about .team-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.4vw, 1.2rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .team-count {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--amber);
}

.page-about .team-bar {
  height: 4px;
  margin: 0.5rem 0 0.45rem;
  border-radius: 2px;
  background: rgba(232, 237, 243, 0.1);
  overflow: hidden;
}

.page-about .team-bar span {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.page-about .team-desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .team-note {
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
  border-left: 2px solid var(--orange);
  padding-left: 0.9rem;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--text-soft);
}

/* ---------- 生态 ---------- */
.page-about .about-eco {
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(124, 92, 255, 0.16), rgba(124, 92, 255, 0) 60%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink-3) 100%);
  color: var(--paper);
}

.page-about .about-eco .filter-bar {
  margin: 1.4rem 0 0.6rem;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-about .about-eco .filter-status {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--text-mute);
  margin: 0 0 1.3rem;
}

.page-about .eco-layout {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: start;
}

.page-about .eco-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.7rem, 2vw, 0.9rem);
}

.page-about .eco-node {
  position: relative;
  padding: 0.95rem 1rem 1rem;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(11, 15, 20, 0.46);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .eco-node:hover {
  border-color: rgba(56, 214, 255, 0.55);
  transform: translateY(-2px);
}

.page-about .eco-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0.35rem;
  color: var(--paper);
}

.page-about .eco-text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.68;
  color: var(--text-soft);
}

.page-about .eco-figure {
  margin: 0;
}

.page-about .eco-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

.page-about .eco-figure .media-caption {
  display: block;
  margin-top: 0.7rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-mute);
}

/* ---------- 主张四环 ---------- */
.page-about .about-promise {
  background: var(--paper);
}

.page-about .promise-list {
  list-style: none;
  margin: clamp(1.2rem, 3.4vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-ink);
}

.page-about .promise-item {
  position: relative;
  padding: 1.2rem 0 1.3rem;
  border-bottom: 1px solid var(--line-ink);
}

.page-about .promise-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 0.4rem;
}

.page-about .promise-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.16rem, 3vw, 1.45rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.page-about .promise-text {
  margin: 0;
  max-width: 46ch;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--text-on-light);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3.4rem) 0;
  background:
    radial-gradient(80% 100% at 88% 110%, rgba(255, 122, 26, 0.24), rgba(255, 122, 26, 0) 62%),
    linear-gradient(120deg, var(--ink) 0%, var(--ink-2) 100%);
  color: var(--paper);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(30, 107, 255, 0), var(--cyan), rgba(255, 122, 26, 0));
  opacity: 0.7;
}

.page-about .about-cta-inner {
  position: relative;
  display: grid;
  gap: clamp(1.3rem, 3.4vw, 2.2rem);
  align-items: center;
}

.page-about .about-cta h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.8vw, 2.8rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0.4rem 0 0;
  color: var(--paper);
}

.page-about .about-cta-side {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.page-about .about-cta-meta {
  flex: 1 1 100%;
  margin: 0.3rem 0 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--text-soft);
  word-break: break-word;
}

.page-about .about-cta-note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .paths-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .promise-item {
    padding: 1.4rem 1.5rem 1.5rem 0;
  }

  .page-about .promise-item:nth-child(2n) {
    padding-left: 1.5rem;
    padding-right: 0;
    border-left: 1px solid var(--line-ink);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-about .about-coord {
    align-self: end;
  }

  .page-about .about-banner {
    min-height: 300px;
  }

  .page-about .tl-layout {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: clamp(1.8rem, 4vw, 3rem);
  }

  .page-about .tl-scale {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-self: start;
    position: sticky;
    top: 104px;
    height: 300px;
    padding-right: 1rem;
    border-right: 1px solid var(--about-line-soft);
    font-family: var(--mono);
    font-size: 0.76rem;
    letter-spacing: 0.08em;
    color: var(--text-mute);
  }

  .page-about .tl-item {
    padding-left: 2.4rem;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(2rem, 4vw, 3rem);
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 4vw, 3rem);
  }

  .page-about .eco-figure {
    position: sticky;
    top: 104px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }
}

@media (min-width: 1180px) {
  .page-about .eco-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-h1 {
    margin-top: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .eco-node {
    transition: none;
  }

  .page-about .eco-node:hover {
    transform: none;
  }
}

.page-about {
  --w: 1rem;
}