/* ===== 平台介绍 · 编辑部式长文版式 ===== */
.page-about {
  --ab-rail: 84px;
  --ab-gap: clamp(18px, 3vw, 46px);
  --ab-sec: clamp(52px, 8vw, 104px);
  background: var(--abyss);
  color: var(--white);
  padding-bottom: clamp(56px, 9vw, 120px);
  overflow-x: hidden;
}

.page-about a {
  color: var(--cyan);
}

.page-about .crumbs {
  padding-top: clamp(18px, 4vw, 34px);
  padding-bottom: clamp(4px, 1.2vw, 12px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(18px, 3.4vw, 44px) 0 clamp(34px, 6vw, 76px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4.6vw, 58px);
  align-items: center;
}

.page-about .ab-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-about .ab-hero h1 {
  margin: 0 0 clamp(16px, 2.2vw, 26px);
  font-size: clamp(29px, 5.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: 0.018em;
  max-width: 13ch;
}

.page-about .ab-hero__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .ab-hero__figure {
  position: relative;
  padding: clamp(14px, 2.4vw, 26px);
  background-color: var(--night);
  background-image:
    linear-gradient(150deg, rgba(47, 227, 210, 0.12), rgba(75, 46, 131, 0.24) 46%, rgba(3, 11, 20, 0) 80%);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

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

.page-about .ab-hero__tag {
  position: absolute;
  right: 12px;
  top: 22px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  opacity: 0.72;
  pointer-events: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapter {
  position: relative;
  padding: var(--ab-sec) 0;
}

.page-about .ab-chapter + .ab-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--gut);
  right: var(--gut);
  height: 1px;
  background: linear-gradient(90deg, var(--line), rgba(27, 63, 92, 0) 72%);
}

.page-about .ab-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-chapter__rail {
  display: flex;
  align-items: center;
}

.page-about .ab-chapter__year {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .ab-chapter__idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
  opacity: 0.88;
}

.page-about .ab-chapter__title {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0.012em;
  max-width: 22ch;
}

.page-about .ab-chapter p {
  margin: 0 0 15px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--white);
  max-width: 38em;
}

.page-about .ab-lead {
  font-size: clamp(16px, 1.4vw, 17.5px);
  color: var(--mist);
  margin-bottom: 22px;
}

.page-about .ab-note {
  margin-top: 20px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 非对称分栏 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 42px);
}

.page-about .ab-side__title {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 时间点列表 ---------- */
.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-tl li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-tl__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .ab-tl__v {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 数据带 ---------- */
.page-about .ab-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-fig {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: clamp(16px, 2.4vw, 26px) clamp(14px, 2vw, 22px);
  background: var(--night);
}

.page-about .ab-fig__v {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-fig__k {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 团队分工折叠面板 ---------- */
.page-about .ab-roles {
  margin-top: 4px;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-role {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-role summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 12px;
  padding: 14px 2px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-role summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .ab-role__i {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .ab-role__t {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-role__x {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--muted);
  transition: transform 200ms var(--ease), color 200ms var(--ease);
}

.page-about .ab-role[open] .ab-role__x {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .ab-role p {
  margin: 0;
  padding: 0 2px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 三步流程 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  counter-reset: abstep;
}

.page-about .ab-steps li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-steps li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-steps__i {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .ab-steps h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .ab-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 规格小表 ---------- */
.page-about .ab-spec {
  margin: 0;
  padding: 0;
}

.page-about .ab-spec dt {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .ab-spec dt:first-of-type {
  margin-top: 0;
}

.page-about .ab-spec dd {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
}

/* ---------- 赛事覆盖 ---------- */
.page-about .ab-cov__figure {
  margin: clamp(20px, 3vw, 32px) 0 clamp(24px, 3.6vw, 40px);
}

.page-about .ab-cov {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-about .ab-cov__row {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-cov__row h3 {
  margin: 12px 0 8px;
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 900;
  letter-spacing: 0.012em;
}

.page-about .ab-cov__row p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 版本演进 ---------- */
.page-about .ab-rel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 42px);
  align-items: start;
}

.page-about .ab-ver__figure {
  margin: 0;
}

.page-about .ab-ver {
  display: flex;
  overflow-x: auto;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-ver::-webkit-scrollbar {
  height: 6px;
}

.page-about .ab-ver::-webkit-scrollbar-track {
  background: var(--night);
}

.page-about .ab-ver::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .ab-ver__item {
  flex: 1 0 min(280px, 78vw);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--night);
}

.page-about .ab-ver__tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

.page-about .ab-ver__item h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.012em;
}

.page-about .ab-ver__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 辽宁服务区块 ---------- */
.page-about .ab-region {
  position: relative;
  margin-top: clamp(14px, 2vw, 22px);
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--line);
  background-color: var(--night);
  background-image: linear-gradient(115deg, rgba(47, 227, 210, 0.09) 0 11%, rgba(75, 46, 131, 0.2) 11% 34%, rgba(3, 11, 20, 0) 34% 100%);
}

.page-about .ab-region p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--white);
  max-width: 36em;
}

.page-about .ab-region p:last-of-type {
  margin-bottom: 22px;
}

.page-about .ab-region__acts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .ab-copy-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  min-height: 1em;
}

/* ---------- 下一赛季 ---------- */
.page-about .ab-next {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-next li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-next li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-next__i {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .ab-next h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .ab-next p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-split__side .btn {
  margin-top: 20px;
}

/* ---------- 图片容器 ---------- */
.page-about .media {
  margin: 0;
  overflow: hidden;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-band {
    grid-template-columns: 1.25fr 1fr 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .ab-chapter__grid {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: var(--ab-gap);
  }

  .page-about .ab-chapter__rail {
    align-items: flex-start;
    padding-top: 8px;
  }

  .page-about .ab-chapter__year {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.22em;
    max-height: 190px;
  }

  .page-about .ab-split--7-5 {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-split--8-4 {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-about .ab-split--5-3 {
    grid-template-columns: minmax(0, 5fr) minmax(0, 3fr);
  }

  .page-about .ab-rel {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
  }

  .page-about .ab-cov__row {
    display: grid;
    grid-template-columns: 118px minmax(0, 4fr) minmax(0, 7fr);
    gap: 20px 26px;
    align-items: start;
    padding: 24px 0;
  }

  .page-about .ab-cov__row h3 {
    margin: 0;
  }

  .page-about .ab-cov__row p {
    margin: 0;
  }
}

@media (min-width: 980px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role__x {
    transition: none;
  }
}
</final>