.page-about {
  --about-hair: rgba(11, 22, 34, 0.12);
  --about-hair-light: rgba(255, 255, 255, 0.14);
  --about-ink-soft: rgba(246, 242, 233, 0.78);
  --about-ink-faint: rgba(246, 242, 233, 0.6);
  --about-block: clamp(2.5rem, 6vw, 5rem);
  background: var(--paper);
  color: var(--body-ink);
  overflow-x: hidden;
}

.page-about [id] {
  scroll-margin-top: 5.5rem;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 7.2vw, 4.1rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0.7rem 0 1.2rem;
  max-width: min(100%, 960px);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.3vw, 1.14rem);
  line-height: 1.85;
  color: var(--body-ink);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-fact {
  background: var(--paper);
  padding: 1rem 1.05rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
  line-height: 1;
  color: var(--ink);
}

.page-about .about-fact__num em {
  font-style: normal;
  font-size: 0.58em;
  color: var(--grass);
  margin-left: 0.1em;
}

.page-about .about-fact__label {
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 章节索引 ---------- */

.page-about .about-toc {
  padding-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0.85rem 0;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  padding: 0.36rem 0.85rem;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--body-ink);
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  background: var(--grass);
  border-color: var(--grass);
  color: #fff;
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  padding: var(--about-block) 0;
  position: relative;
}

.page-about .about-block--paper2 {
  background: var(--paper-2);
}

.page-about .about-block--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 4.6vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.95rem;
}

.page-about .about-block--ink .about-title {
  color: var(--paper);
}

.page-about .about-text {
  margin: 0 0 1rem;
  font-size: clamp(0.97rem, 2.2vw, 1.05rem);
  line-height: 1.85;
  color: var(--body-ink);
}

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

.page-about .about-text--wide {
  max-width: 68ch;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-block--ink .about-text {
  color: var(--about-ink-soft);
}

/* ---------- 图片容器 ---------- */

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

.page-about .about-figure__frame {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 3 / 2;
  background: var(--ink-2);
}

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

.page-about .about-figure--slant .about-figure__frame {
  clip-path: polygon(0 0, 100% 3%, 100% 100%, 0 97%);
}

.page-about .about-figure__caption {
  margin-top: 0.8rem;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-block--ink .about-figure__caption {
  color: var(--about-ink-faint);
}

/* ---------- 我们是谁 ---------- */

.page-about .about-who__grid {
  display: grid;
  gap: 1.75rem;
  align-items: start;
}

.page-about .about-panel {
  background: var(--ink);
  color: var(--paper);
  padding: 1.4rem 1.35rem 1.5rem;
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-panel__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-panel__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--about-hair-light);
}

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

.page-about .about-panel__key {
  font-size: 0.85rem;
  color: var(--about-ink-faint);
}

.page-about .about-panel__val {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--lime);
  text-align: right;
}

/* ---------- 整理流程 ---------- */

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

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-flow__idx {
  font-size: 1rem;
  line-height: 1.45;
  color: var(--grass);
}

.page-about .about-flow__name {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--body-ink);
}

/* ---------- 团队构成 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-meters {
  display: grid;
  gap: 1.15rem;
  margin-top: clamp(1.5rem, 4vw, 2rem);
}

.page-about .about-meter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem 0.9rem;
  align-items: baseline;
}

.page-about .about-meter__label {
  grid-column: 1;
  font-size: 0.88rem;
  color: var(--body-ink);
}

.page-about .about-meter__val {
  grid-column: 2;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .about-meter__track {
  grid-column: 1 / -1;
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(11, 22, 34, 0.08);
  overflow: hidden;
}

.page-about .about-meter__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--grass);
}

.page-about .about-meter--a .about-meter__fill {
  width: 35%;
}

.page-about .about-meter--b .about-meter__fill {
  width: 49%;
  background: var(--lime);
}

.page-about .about-meter--c .about-meter__fill {
  width: 16%;
  background: var(--cyan);
}

/* ---------- 数据来源 ---------- */

.page-about .about-sources__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-sources__card {
  margin-top: clamp(1.25rem, 3.5vw, 1.75rem);
  padding: 1.15rem 1.3rem 1.25rem;
  border-radius: var(--radius-sm);
}

.page-about .about-sources__card-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-sources__card-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage__grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.5rem, 4vw, 2rem);
  background: rgba(11, 22, 34, 0.14);
  border: 1px solid rgba(11, 22, 34, 0.14);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--paper);
  padding: 1.05rem 1.1rem 1.15rem;
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(1.55rem, 5vw, 2.1rem);
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--grass);
  margin-left: 0.08em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-cycle {
  position: relative;
  overflow: hidden;
  margin-top: clamp(1.75rem, 4.5vw, 2.75rem);
  padding: clamp(1.4rem, 4vw, 2rem);
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-cycle::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 240, 75, 0.3), rgba(200, 240, 75, 0) 68%);
  pointer-events: none;
}

.page-about .about-cycle .about-cycle__eyebrow {
  color: var(--lime);
  margin: 0 0 0.6rem;
}

.page-about .about-cycle__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.3rem, 3.6vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cycle__text {
  position: relative;
  z-index: 1;
  margin: 0 0 1.4rem;
  max-width: 60ch;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-cycle .btn {
  position: relative;
  z-index: 1;
}

/* ---------- 为什么选择我们 ---------- */

.page-about .about-why__grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
  margin-top: 0.5rem;
}

.page-about .about-why__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .about-why__point {
  display: grid;
  grid-template-columns: 0.5rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
}

.page-about .about-why__mark {
  display: block;
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.6rem;
  border-radius: 50%;
  background: var(--pulse);
}

.page-about .about-why__text {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-about .about-why__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

/* ---------- 断点 ---------- */

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

  .page-about .about-fact {
    padding: 1.15rem 1.2rem 1.25rem;
  }

  .page-about .about-flow__step {
    grid-template-columns: 3.75rem minmax(0, 1fr);
    gap: 1.25rem;
    padding: 1.6rem 0;
  }

  .page-about .about-flow__idx {
    font-size: 1.15rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-who__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .about-sources__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: clamp(3.2rem, 5.4vw, 4.4rem);
  }

  .page-about .about-title {
    font-size: clamp(2rem, 3.2vw, 2.7rem);
  }
}

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