.page-about {
  --about-aside-w: 320px;
  --about-plate-shadow: 0 18px 40px -28px rgba(11, 110, 138, .55);
  padding-bottom: clamp(40px, 6vw, 72px);
}

/* ---------- 首屏专题封面 ---------- */
.page-about .about-cover {
  padding-block: clamp(18px, 3vw, 34px) clamp(26px, 4vw, 52px);
}

.page-about .about-cover__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-about .about-cover__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px 13px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  background: var(--paper);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
}

.page-about .about-cover__lead h1 {
  margin: 0 0 20px;
  color: var(--lake-deep);
  font-family: var(--font-display);
  font-size: clamp(38px, 8vw, 76px);
  font-weight: 900;
  line-height: .98;
  letter-spacing: -.02em;
}

.page-about .about-cover__intro {
  max-width: 34em;
  margin: 0;
  color: var(--ink);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.78;
}

.page-about .about-cover__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cover__jump-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-cover__jump-link:hover,
.page-about .about-cover__jump-link:focus-visible {
  border-color: var(--orange);
  background: var(--sun);
  transform: translateY(-2px);
}

/* 品牌档案说明牌 */
.page-about .about-plate {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-lg);
  box-shadow: var(--about-plate-shadow);
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: 14px;
  width: 56px;
  height: 56px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  border-radius: 0 0 12px 0;
  opacity: .6;
  pointer-events: none;
}

.page-about .about-plate .card__index {
  margin: 0 0 6px;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
}

.page-about .about-plate .card__title {
  margin: 0;
  color: var(--lake-deep);
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 800;
  line-height: 1.25;
}

.page-about .about-facts {
  margin: 16px 0 0;
}

.page-about .about-facts__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(23, 38, 46, .2);
}

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

.page-about .about-facts dt {
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
}

.page-about .about-facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  text-align: right;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--lake-deep);
}

/* ---------- 左右分屏主体 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-body__main {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  min-width: 0;
}

.page-about .about-body__aside {
  min-width: 0;
}

.page-about .about-aside {
  display: grid;
  gap: 16px;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  min-width: 0;
}

.page-about .about-sec__head {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.page-about .about-sec .section__title {
  margin: 0;
  color: var(--lake-deep);
  font-size: clamp(26px, 3.8vw, 40px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.01em;
}

.page-about .about-sec .section__lead {
  margin: 0;
  max-width: 42em;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-sec__text {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-sec--lake {
  padding: clamp(22px, 3.2vw, 38px);
  border-radius: var(--r-lg);
  background: var(--lake-soft);
}

.page-about .about-sec--ink {
  padding: clamp(22px, 3.2vw, 38px);
  border-radius: var(--r-lg);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-sec--ink .section__title {
  color: var(--paper);
}

.page-about .about-sec--ink .section__lead {
  color: rgba(255, 249, 240, .76);
}

.page-about .about-sec--ink .label-tag {
  border-color: rgba(255, 249, 240, .42);
  background: transparent;
  color: var(--sun);
}

.page-about .about-sec--ink .about-sec__text {
  color: rgba(255, 249, 240, .82);
}

.page-about .about-inline-link {
  color: var(--sun);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-about .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
  object-fit: cover;
}

.page-about .media-frame__caption {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  margin-top: 6px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 147, 46, .18));
}

.page-about .tl__item {
  position: relative;
  padding-left: 34px;
}

.page-about .tl__head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__head::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 19px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--paper);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl__head::after {
  content: "+";
  margin-left: auto;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
}

.page-about .tl__item[open] .tl__head::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .tl__item[open] .tl__head::after {
  content: "−";
  color: var(--orange);
}

.page-about .tl__year {
  color: var(--lake);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
}

.page-about .tl__title {
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .tl__body {
  padding: 0 0 16px;
}

.page-about .tl__body p {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .tl__item[open] .tl__head {
  border-bottom: 1px dashed rgba(23, 38, 46, .16);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
}

.page-about .about-team__card {
  padding: 20px;
  border-radius: var(--r-md);
}

.page-about .about-team__card .card__index {
  margin: 0 0 6px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
}

.page-about .about-team__card .card__title {
  margin: 0 0 8px;
  color: var(--lake-deep);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.3;
}

.page-about .about-team__card .card__text {
  margin: 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 规则内容（深墨块） ---------- */
.page-about .about-rules {
  display: grid;
  gap: 14px;
}

.page-about .about-rules__item {
  padding: 18px;
  border: 1px solid rgba(255, 249, 240, .18);
  border-radius: var(--r-md);
  background: rgba(255, 249, 240, .05);
}

.page-about .about-rules__num {
  margin: 0 0 6px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 600;
  line-height: 1;
}

.page-about .about-rules__title {
  margin: 0 0 8px;
  color: var(--paper);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .about-rules__item p:last-child {
  margin: 0;
  color: rgba(255, 249, 240, .78);
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 数据卡 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stats__item {
  padding: 16px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
}

.page-about .about-stats__num {
  margin: 0;
  color: var(--lake);
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.1;
}

.page-about .about-stats__num small {
  margin-left: 2px;
  font-size: 12px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-stats__label {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 12px;
}

.page-about .about-partners__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid rgba(201, 147, 46, .5);
  border-radius: var(--r-md);
  background: var(--paper);
}

.page-about .about-partners__num {
  color: var(--lake-deep);
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
}

.page-about .about-partners__label {
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
}

/* ---------- 下一站 ---------- */
.page-about .about-next {
  display: grid;
  gap: 16px;
  padding-top: 24px;
  border-top: 2px solid var(--ink);
}

.page-about .about-next .section__title {
  margin: 0;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.15;
}

.page-about .about-next__links {
  display: grid;
  gap: 10px;
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-next__link span {
  color: var(--mist);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--orange);
  background: var(--paper);
  transform: translateY(-2px);
}

/* ---------- 侧栏卡片 ---------- */
.page-about .about-aside__card {
  padding: 20px;
  border-radius: var(--r-md);
}

.page-about .about-aside__card .card__index {
  margin: 0 0 6px;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
}

.page-about .about-aside__card .card__title {
  margin: 0 0 12px;
  color: var(--lake-deep);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.3;
}

.page-about .about-meta {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-meta__row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-meta__num {
  min-width: 2.2em;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.1;
}

.page-about .about-meta__label {
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .about-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-links__item {
  display: block;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .7);
  color: var(--lake-deep);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-links__item:hover,
.page-about .about-links__item:focus-visible {
  background: #fff;
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.16fr) minmax(0, .84fr);
    gap: clamp(30px, 5vw, 60px);
  }

  .page-about .about-plate {
    margin-top: 8px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) var(--about-aside-w);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-aside {
    position: sticky;
    top: 24px;
  }

  .page-about .about-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cover__jump-link,
  .page-about .about-next__link,
  .page-about .about-links__item,
  .page-about .tl__head::before {
    transition: none;
  }

  .page-about .about-cover__jump-link:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}