.page-about {
  --about-cut: 18px;
  --about-cut-sm: 12px;
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  --about-hair: rgba(143, 163, 200, 0.18);
  --about-band: #0E1738;
  background: var(--xp-void);
  color: var(--xp-porcelain);
  font-family: var(--xp-font-body);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about p {
  margin: 0 0 1.05em;
}

.page-about a {
  color: var(--xp-cyan);
  text-decoration-color: rgba(53, 232, 208, 0.4);
  text-underline-offset: 3px;
}

.page-about a:focus-visible {
  outline: 2px solid var(--xp-cyan);
  outline-offset: 3px;
}

.page-about .xp-breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  font-family: var(--xp-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--xp-mist);
}

.page-about .xp-breadcrumb li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: rgba(143, 163, 200, 0.5);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(1.1rem, 3.5vw, 2rem) 0 clamp(2.4rem, 6vw, 4.5rem);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(58% 52% at 86% 10%, rgba(53, 232, 208, 0.17), transparent 68%),
    radial-gradient(48% 46% at 6% 88%, rgba(255, 122, 47, 0.14), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
  align-items: center;
}

.page-about .about-hero__tag {
  margin: 1.1rem 0 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--xp-orange);
  font-family: var(--xp-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--xp-cyan);
}

.page-about .about-hero__title {
  margin: 0.7rem 0 0.85rem;
  font-family: var(--xp-font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  color: var(--xp-soft);
  font-size: clamp(1rem, 2.2vw, 1.12rem);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.7rem 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-hero__stat dt {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--xp-mist);
}

.page-about .about-hero__stat dd {
  margin: 0.25rem 0 0;
}

.page-about .about-hero__stat-num {
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: clamp(1.3rem, 4.4vw, 1.85rem);
  line-height: 1.1;
  color: var(--xp-porcelain);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  background: var(--xp-indigo);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  padding: clamp(2.2rem, 5.5vw, 4.25rem) 0;
  scroll-margin-top: 7rem;
}

.page-about .about-chapter--band {
  background: var(--about-band);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-chapter__head {
  margin-bottom: 1.15rem;
}

.page-about .about-chapter__num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: clamp(1.9rem, 6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--xp-cyan);
  text-decoration: none;
  transition: opacity 200ms ease;
}

.page-about .about-chapter__num:hover {
  opacity: 0.7;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--xp-font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.8vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.page-about .about-chapter__body > p {
  max-width: 68ch;
  color: var(--xp-soft);
}

/* ---------- 事实栏 ---------- */

.page-about .about-facts {
  padding: clamp(1.05rem, 3vw, 1.5rem);
}

.page-about .about-facts__title {
  margin: 0 0 0.9rem;
  font-family: var(--xp-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--xp-mist);
}

.page-about .about-facts__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-facts__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.58rem 0;
  border-bottom: 1px solid var(--about-hair);
  font-size: 0.92rem;
}

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

.page-about .about-facts__k {
  color: var(--xp-mist);
}

.page-about .about-facts__v {
  font-family: var(--xp-font-mono);
  font-weight: 600;
  color: var(--xp-porcelain);
  white-space: nowrap;
}

/* ---------- 折线图 ---------- */

.page-about .about-chart {
  margin: 1.5rem 0 1.4rem;
  padding: clamp(0.85rem, 2.5vw, 1.3rem);
  background: var(--xp-navy);
  border: 1px solid var(--about-hair);
  clip-path: polygon(0 var(--about-cut), var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-chart__axis {
  stroke: rgba(143, 163, 200, 0.3);
  stroke-width: 1;
}

.page-about .about-chart__line {
  fill: none;
  stroke: var(--xp-cyan);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .about-chart__dot {
  fill: var(--xp-orange);
}

.page-about .about-chart__dot--now {
  fill: var(--xp-gold);
}

.page-about .about-chart__label {
  fill: var(--xp-mist);
  font-family: var(--xp-font-mono);
  font-size: 15px;
}

.page-about .about-chart__label--end {
  fill: var(--xp-gold);
}

.page-about .about-chart__caption {
  margin-top: 0.7rem;
  font-size: 0.84rem;
  color: var(--xp-mist);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline__jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 1.2rem;
  font-family: var(--xp-font-mono);
  font-size: 0.8rem;
  color: var(--xp-mist);
}

.page-about .about-timeline__jump a {
  padding: 0.18rem 0.55rem;
  border: 1px solid rgba(53, 232, 208, 0.3);
  color: var(--xp-cyan);
  text-decoration: none;
  transition: background-color 200ms ease;
}

.page-about .about-timeline__jump a:hover {
  background: rgba(53, 232, 208, 0.14);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-node {
  padding: 0.95rem 1rem 1rem 1.15rem;
  border-left: 2px solid rgba(143, 163, 200, 0.24);
  background: linear-gradient(90deg, rgba(21, 32, 72, 0.75), rgba(21, 32, 72, 0.1));
  scroll-margin-top: 7rem;
  transition: border-color 220ms ease, background-color 220ms ease;
}

.page-about .about-node:target {
  border-left-color: var(--xp-cyan);
  background: linear-gradient(90deg, rgba(53, 232, 208, 0.17), rgba(21, 32, 72, 0.06));
}

.page-about .about-node__year {
  margin: 0;
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--xp-cyan);
}

.page-about .about-node__title {
  margin: 0.25rem 0 0.35rem;
  font-family: var(--xp-font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
}

.page-about .about-node__text {
  margin: 0;
  font-size: 0.94rem;
  color: var(--xp-soft);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 1.7rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--xp-indigo);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.83rem;
  color: var(--xp-mist);
}

/* ---------- 职能条带 ---------- */

.page-about .about-roles {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-role {
  padding: 1rem 1.1rem 1.15rem;
  background: var(--xp-indigo);
  border-top: 2px solid var(--xp-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut-sm)), calc(100% - var(--about-cut-sm)) 100%, 0 100%);
  transition: transform 200ms ease, background-color 200ms ease;
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-4px);
  background: #1B2755;
}

.page-about .about-role__num {
  display: block;
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: clamp(1.9rem, 6vw, 2.55rem);
  line-height: 1;
  color: var(--xp-cyan);
}

.page-about .about-role__label {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--xp-font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.page-about .about-role__text {
  margin: 0.45rem 0 0;
  font-size: 0.92rem;
  color: var(--xp-soft);
}

/* ---------- 呼吸区 ---------- */

.page-about .about-breath {
  background: var(--xp-void);
  padding: clamp(2rem, 6vw, 3.6rem) 0;
}

.page-about .about-breath__inner {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  border-top: 1px solid var(--about-hair);
  padding-top: 1.2rem;
}

.page-about .about-breath__num {
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  line-height: 1;
  color: rgba(53, 232, 208, 0.5);
}

.page-about .about-breath__text {
  margin: 0;
  font-family: var(--xp-font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 3vw, 1.5rem);
  letter-spacing: -0.01em;
  color: var(--xp-soft);
}

/* ---------- 生态网格 ---------- */

.page-about .about-network {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: 1.6rem 0 0;
}

.page-about .about-network__item {
  padding: 1rem 1.15rem 1.1rem;
  background: var(--xp-navy);
  border-left: 2px solid var(--xp-orange);
}

.page-about .about-network__item--gold {
  border-left-color: var(--xp-gold);
}

.page-about .about-network__num {
  display: block;
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  line-height: 1.1;
  color: var(--xp-ysporcelain, #E8EFFA);
  color: #E8EFFA;
}

.page-about .about-network__num--gold {
  color: var(--xp-gold);
}

.page-about .about-network__label {
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
  color: var(--xp-soft);
}

/* ---------- 服务节奏 ---------- */

.page-about .about-commit {
  list-style: none;
  margin: 1.4rem 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-commit__item {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-commit__item:first-child {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-commit__time {
  font-family: var(--xp-font-mono);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--xp-cyan);
}

.page-about .about-commit__desc {
  font-size: 0.95rem;
  color: var(--xp-soft);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

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

/* ---------- 桌面栅格 ---------- */

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-commit__item {
    grid-template-columns: 11rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.25rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 1040px) {
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.82fr);
    align-items: start;
  }

  .page-about .about-chapter__aside {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-chapter__num {
    font-size: clamp(2.4rem, 3.4vw, 3.4rem);
  }
}

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

  .page-about .about-role:hover,
  .page-about .about-role:focus-within {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --xp-ysporcelain: currentColor;
}