.page-about {
  --about-line: rgba(11, 26, 22, 0.14);
  --about-dot: var(--turf);
  background: var(--mist);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(36px, 5vw, 68px);
  background: linear-gradient(180deg, var(--paper) 0%, var(--mist) 82%);
  border-bottom: 3px solid var(--ink);
}

.page-about .breadcrumb {
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(11, 26, 22, 0.5);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  color: rgba(11, 26, 22, 0.3);
}

.page-about .breadcrumb a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--turf);
  border-bottom-color: var(--score);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(36px, 7.6vw, 84px);
  font-weight: 250;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about .about-hero__body .lede {
  margin: 0;
  max-width: 42em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__media {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-hero__media .media__cap,
.page-about .about-evidence__media .media__cap,
.page-about .about-team__media .media__cap {
  margin-top: 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: rgba(11, 26, 22, 0.55);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 章节速查 ---------- */
.page-about .about-index {
  background: var(--ink);
  border-bottom: 3px solid var(--ink);
}

.page-about .about-index__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-about .about-index a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .about-index a:hover {
  color: var(--turf-light);
  border-bottom-color: var(--score);
}

/* ---------- 数字看板 ---------- */
.page-about .about-numbers {
  padding-top: clamp(28px, 4vw, 44px);
  padding-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border: 3px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
  opacity: 1;
  transition: opacity 240ms var(--ease);
}

.page-about .about-board__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 3vw, 30px) clamp(16px, 2.4vw, 26px);
  border-bottom: 2px solid var(--about-line);
  border-right: 2px solid var(--about-line);
}

.page-about .about-board__cell:nth-child(2n) {
  border-right: 0;
}

.page-about .about-board__cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-about .about-board .num {
  line-height: 1;
}

.page-about .about-board .num small {
  font-size: 0.42em;
  margin-left: 2px;
}

.page-about .about-board__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(11, 26, 22, 0.62);
}

@media (min-width: 820px) {
  .page-about .about-board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-board__cell {
    border-bottom: 0;
  }
  .page-about .about-board__cell:nth-child(2n) {
    border-right: 2px solid var(--about-line);
  }
  .page-about .about-board__cell:last-child {
    border-right: 0;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-trail {
  background: var(--mist);
}

.page-about .about-track {
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  gap: 12px;
  padding-left: 28px;
  padding-bottom: clamp(32px, 4vw, 52px);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 18px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--turf-light), rgba(127, 208, 163, 0.12));
}

.page-about .about-track__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--about-dot);
  box-shadow: 0 0 0 3px var(--mist);
}

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

.page-about .about-track__item:last-child::before {
  bottom: auto;
  height: 0;
}

.page-about .about-track__year .num {
  line-height: 1;
  color: var(--score);
}

.page-about .about-track__year small {
  font-size: 0.5em;
}

.page-about .about-track__card {
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-soft);
  padding: clamp(18px, 2.6vw, 28px);
  transition: border-color 140ms var(--ease), box-shadow 140ms var(--ease), transform 140ms var(--ease);
}

.page-about .about-track__card:hover {
  border-color: var(--score);
  box-shadow: var(--shadow-score);
  transform: translate(-2px, -2px);
}

.page-about .about-track__card .card__meta {
  margin: 0 0 8px;
}

.page-about .about-track__card .card__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 300;
  letter-spacing: -0.01em;
}

.page-about .about-track__card .card__text {
  margin: 0;
  max-width: 38em;
}

@media (min-width: 860px) {
  .page-about .about-track__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    padding-left: 34px;
  }
  .page-about .about-track__item::before {
    left: 10px;
  }
  .page-about .about-track__item::after {
    left: 4px;
  }
  .page-about .about-track__item:nth-child(even) .about-track__card {
    margin-left: clamp(0px, 4vw, 48px);
  }
}

/* ---------- 比分来路 ---------- */
.page-about .about-evidence {
  background: var(--paper);
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
}

.page-about .about-evidence__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-evidence__title {
  margin: 12px 0 18px;
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-evidence__text p {
  margin: 0 0 16px;
  max-width: 36em;
}

.page-about .about-fields {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.page-about .about-fields li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-fields__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--turf);
  padding-top: 2px;
}

.page-about .about-fields__val {
  font-size: 15px;
  color: rgba(11, 26, 22, 0.78);
}

.page-about .about-evidence__link {
  margin-top: 20px;
  font-size: 14px;
  color: rgba(11, 26, 22, 0.65);
}

.page-about .about-evidence__link a,
.page-about .about-partner__cta a {
  color: var(--turf);
  text-decoration: none;
  border-bottom: 1px solid var(--turf-light);
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}

.page-about .about-evidence__link a:hover,
.page-about .about-partner__cta a:hover {
  color: var(--score);
  border-bottom-color: var(--score);
}

@media (min-width: 900px) {
  .page-about .about-evidence__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

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

.page-about .about-team__grid {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 46px);
  border: 3px solid var(--ink);
  background: var(--paper);
}

.page-about .about-role {
  padding: clamp(22px, 3vw, 34px);
  border-bottom: 2px solid var(--about-line);
  border-left: 8px solid var(--turf);
}

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

.page-about .about-role--check {
  border-left-color: var(--cup);
}

.page-about .about-role--photo {
  border-left-color: var(--amber);
}

.page-about .about-role__count {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(11, 26, 22, 0.55);
}

.page-about .about-role__count .num {
  color: var(--score);
  margin-right: 2px;
}

.page-about .about-role__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 300;
  letter-spacing: -0.01em;
}

.page-about .about-role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 26, 22, 0.8);
}

.page-about .about-team__media {
  margin-top: clamp(28px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-role {
    border-bottom: 0;
    border-right: 2px solid var(--about-line);
  }
  .page-about .about-role:last-child {
    border-right: 0;
  }
}

/* ---------- 覆盖量级 ---------- */
.page-about .about-coverage {
  background: var(--paper);
  border-top: 3px solid var(--ink);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-coverage__title {
  margin: 12px 0 18px;
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-coverage__text p {
  margin: 0 0 16px;
  max-width: 36em;
}

.page-about .about-coverage__chart {
  align-self: start;
  padding: clamp(18px, 2.6vw, 28px);
  border: 3px solid var(--ink);
  background: var(--mist);
  box-shadow: var(--shadow-hard);
}

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

.page-about .covermap__label {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: rgba(11, 26, 22, 0.7);
}

.page-about .covermap__value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
}

.page-about .covermap__value--light {
  fill: var(--paper);
}

.page-about .covermap__value--dark {
  fill: var(--ink);
}

.page-about .covermap__bar--1 {
  fill: #14432F;
}

.page-about .covermap__bar--2 {
  fill: #1E7A4C;
}

.page-about .covermap__bar--3 {
  fill: #3E9F6B;
}

.page-about .covermap__bar--4 {
  fill: #7FD0A3;
}

.page-about .covermap__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(11, 26, 22, 0.55);
}

.page-about .about-coverage__stats {
  display: grid;
  gap: 0;
  margin-top: clamp(32px, 5vw, 56px);
  border-top: 2px solid var(--ink);
}

.page-about .about-stat {
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-stat .num {
  display: block;
  line-height: 1;
  color: var(--score);
  margin-bottom: 8px;
}

.page-about .about-stat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(11, 26, 22, 0.72);
  max-width: 30em;
}

@media (min-width: 900px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
  }
  .page-about .about-coverage__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 44px);
  }
  .page-about .about-stat {
    border-bottom: 0;
  }
}

/* ---------- 更新节奏与合作 ---------- */
.page-about .about-rhythm {
  background: var(--mist);
}

.page-about .about-rhythm__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-phase {
  padding: clamp(22px, 3vw, 32px);
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.page-about .about-phase--season {
  border-top: 10px solid var(--turf);
}

.page-about .about-phase--break {
  border-top: 10px solid var(--amber);
}

.page-about .about-phase h3 {
  margin: 14px 0 14px;
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 300;
  letter-spacing: -0.01em;
}

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

.page-about .about-phase li {
  position: relative;
  padding: 9px 0 9px 20px;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(11, 26, 22, 0.8);
  border-bottom: 1px solid var(--about-line);
}

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

.page-about .about-phase li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 8px;
  height: 8px;
  background: var(--turf-light);
}

.page-about .about-phase--break li::before {
  background: var(--amber);
}

.page-about .about-partner {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-about .about-partner__intro {
  max-width: 46em;
}

.page-about .about-partner__title {
  margin: 12px 0 12px;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 300;
  letter-spacing: -0.02em;
}

.page-about .about-partner__intro p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 26, 22, 0.78);
}

.page-about .about-partner__list {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .about-partner__list .card {
  padding: clamp(20px, 2.6vw, 28px);
}

.page-about .about-partner__list .card__title {
  margin: 8px 0 10px;
  font-size: 19px;
  font-weight: 300;
}

.page-about .about-partner__list .card__text {
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-partner__cta {
  margin: clamp(26px, 3.5vw, 38px) 0 0;
  padding-top: 20px;
  border-top: 2px solid var(--ink);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 26, 22, 0.78);
}

@media (min-width: 760px) {
  .page-about .about-rhythm__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partner__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__card,
  .page-about .about-board {
    transition: none;
  }
  .page-about .about-track__card:hover {
    transform: none;
  }
}