.page-about {
  --ab-narrow: 170px;
  --ab-aside: 240px;
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    to right,
    rgba(30, 30, 28, 0.045) 0 1px,
    transparent 1px 96px
  );
  color: var(--ink);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7.4vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  color: var(--ink);
}

.page-about .about-hero .lede {
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: #3A3936;
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--ink);
  padding-top: 6px;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--scale);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  text-align: right;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

/* ---------- 品牌沿革 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}

.page-about .about-index {
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--scale);
}

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

.page-about .about-index__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 9px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--scale);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--summer);
  border-bottom-color: var(--summer);
}

.page-about .about-index__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink);
}

.page-about .about-chapter {
  padding: 4px 12px 4px 14px;
  margin-left: -14px;
  border-left: 2px solid transparent;
  scroll-margin-top: calc(var(--topbar-h) + 24px);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-chapter:target {
  border-left-color: var(--summer);
  background-color: rgba(232, 106, 51, 0.05);
}

.page-about .about-chapter h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.1vw, 26px);
  line-height: 1.25;
  margin: 0 0 10px;
}

.page-about .about-chapter p {
  margin: 0 0 26px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: #3A3936;
}

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

.page-about .about-origin__figure .figure__media {
  overflow: hidden;
  background: linear-gradient(160deg, #E9E5DA 0%, #D6D2C7 100%);
}

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

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

@media (min-width: 990px) {
  .page-about .about-origin__grid {
    grid-template-columns: var(--ab-narrow) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }

  .page-about .about-origin__body {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-origin__aside {
    grid-column: 2;
    grid-row: 2;
    max-width: 320px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-origin__grid {
    grid-template-columns: var(--ab-narrow) minmax(0, 1fr) var(--ab-aside);
    gap: clamp(28px, 3vw, 48px);
  }

  .page-about .about-origin__aside {
    grid-column: 3;
    grid-row: 1;
    max-width: none;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__head {
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item {
  --nodefill: var(--winter);
  --nodeink: #4E6274;
  position: relative;
  padding-left: clamp(26px, 4vw, 40px);
  padding-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  background: var(--nodefill);
  border: 1px solid var(--ink);
}

.page-about .about-timeline__item--spring {
  --nodefill: var(--spring);
  --nodeink: #4F6B33;
}

.page-about .about-timeline__item--summer {
  --nodefill: var(--summer);
  --nodeink: #B34A1C;
}

.page-about .about-timeline__item--autumn {
  --nodefill: var(--autumn);
  --nodeink: var(--autumn);
}

.page-about .about-timeline__link {
  display: grid;
  gap: 5px;
  text-decoration: none;
  color: inherit;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--nodeink);
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.3;
  transition: color var(--dur) var(--ease);
}

.page-about .about-timeline__link:hover .about-timeline__title,
.page-about .about-timeline__link:focus-visible .about-timeline__title {
  color: var(--summer);
}

.page-about .about-timeline__text {
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--scale);
}

/* ---------- 区域节点 ---------- */
.page-about .about-nodes__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-map {
  border: 1px solid var(--line);
  background: var(--card);
  padding: clamp(14px, 2vw, 26px);
}

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

.page-about .about-map__axis,
.page-about .about-map__tick {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-map__dot {
  fill: var(--card);
  stroke: var(--ink);
  stroke-width: 1;
  transition: fill var(--dur) var(--ease);
}

.page-about .about-map__node:hover .about-map__dot,
.page-about .about-map__node:focus-within .about-map__dot {
  fill: var(--summer);
}

.page-about .about-map__city {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  fill: var(--ink);
}

.page-about .about-map__tip {
  font-family: var(--font-body);
  font-size: 12px;
  fill: var(--scale);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-about .about-map__node:hover .about-map__tip,
.page-about .about-map__node:focus-within .about-map__tip {
  opacity: 1;
}

.page-about .about-map__hint {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--scale);
}

.page-about .about-nodes__list {
  display: grid;
}

.page-about .about-node {
  --node-c: var(--winter);
  padding: 18px 0 20px 16px;
  border-left: 3px solid var(--node-c);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-node--spring {
  --node-c: var(--spring);
}

.page-about .about-node--autumn {
  --node-c: var(--autumn);
}

.page-about .about-node__idx {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--scale);
}

.page-about .about-node__city {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.8vw, 21px);
  line-height: 1.3;
}

.page-about .about-node__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #3A3936;
}

.page-about .about-nodes__figure {
  margin: clamp(28px, 4vw, 52px) 0 0;
}

@media (min-width: 900px) {
  .page-about .about-nodes__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 核定团队 ---------- */
.page-about .about-team__wrap {
  overflow-x: auto;
  border-top: 1px solid var(--ink);
}

.page-about .about-team__table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-team__table thead th {
  padding: 10px 16px 10px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 400;
  color: var(--scale);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__table tbody th,
.page-about .about-team__table tbody td {
  padding: 16px 16px 16px 0;
  text-align: left;
  vertical-align: top;
  line-height: 1.75;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__table tbody th {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  white-space: nowrap;
}

.page-about .about-team__table tbody td {
  color: #3A3936;
}

.page-about .about-team__note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--summer);
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.85;
  color: #3A3936;
}

.page-about .about-team__note a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--summer);
}

.page-about .about-team__note a:hover,
.page-about .about-team__note a:focus-visible {
  color: var(--summer);
}

.page-about .about-team__figure {
  margin: clamp(26px, 3.4vw, 44px) 0 0;
}

/* ---------- 长期合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 52px);
}

.page-about .about-partners__body p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: #3A3936;
}

.page-about .about-partners__body a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--summer);
}

.page-about .about-partners__body a:hover,
.page-about .about-partners__body a:focus-visible {
  color: var(--summer);
}

.page-about .about-partners__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--card);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 42px);
  line-height: 1;
  color: var(--ink);
}

.page-about .about-stat__num::after {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  margin-top: 10px;
  background: var(--summer);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--scale);
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

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

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-next__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
}

.page-about .about-next__detail {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--scale);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 820px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-chapter,
  .page-about .about-map__dot,
  .page-about .about-map__tip,
  .page-about .about-timeline__title {
    transition: none;
  }
}