.page-about {
  --about-soft: rgba(11, 31, 23, 0.74);
  --about-line: rgba(77, 240, 200, 0.16);
  display: block;
  background-color: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .section {
  padding-block: clamp(46px, 7vw, 96px);
}

.page-about .section--tight {
  padding-block: clamp(32px, 5vw, 66px);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .crumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .prose {
  max-width: 64ch;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 5vw, 54px) clamp(38px, 6vw, 78px);
  border-bottom: 1px solid var(--line-soft);
  background-image:
    linear-gradient(var(--about-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-line) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(33px, 8vw, 64px);
  font-weight: 700;
  line-height: 1.03;
  letter-spacing: -0.018em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-hero__lede--sub {
  margin-top: 10px;
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .media-figure {
  margin: 0;
  min-width: 0;
}

.page-about .media-figure .media {
  position: relative;
  overflow: hidden;
  margin: 0;
  background: var(--ink-deep);
  border: 1px solid var(--line);
}

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

.page-about .media--wide .media__img {
  aspect-ratio: 21 / 9;
}

.page-about .media--tall .media__img {
  aspect-ratio: 4 / 5;
}

.page-about .media__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(77, 240, 200, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 240, 200, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about .media__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 17, 13, 0.08), rgba(6, 17, 13, 0.6));
}

.page-about .media__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(143, 163, 155, 0.28);
}

.page-about .media__bar > span {
  display: block;
  height: 100%;
  width: 64%;
  background: var(--cyan);
}

.page-about .media__caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-facts dt {
  font-family: var(--font-num);
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-facts__item:nth-child(2) dt {
  color: var(--amber);
}

.page-about .about-facts dd {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  align-items: start;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-origin__lead p + p {
  margin-top: 16px;
}

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-principles .index-list__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color 0.22s ease;
}

.page-about .about-principles .index-list__item:hover {
  border-color: var(--cyan);
}

.page-about .about-principles .index-list__num {
  padding-top: 4px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-principles h3 {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.4vw, 23px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-principles p {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 服务版图 ---------- */
.page-about .about-scope__body {
  align-items: center;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 42px);
}

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

.page-about .about-coverage__cell {
  background: var(--ink-deep);
  padding: clamp(16px, 2.6vw, 26px);
  transition: background-color 0.24s ease;
}

.page-about .about-coverage__cell:hover,
.page-about .about-coverage__cell:focus-within {
  background: var(--turf);
}

.page-about .about-coverage__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .about-coverage__cell:nth-child(2) .about-coverage__num,
.page-about .about-coverage__cell:nth-child(4) .about-coverage__num {
  color: var(--cyan);
}

.page-about .about-coverage h3 {
  margin: 10px 0 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-coverage p {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 赛季时间线 ---------- */
.page-about .about-track {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--line-soft);
}

.page-about .about-track .timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3.4vw, 38px);
}

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

.page-about .about-track .timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transition: background-color 0.24s ease, box-shadow 0.24s ease;
}

.page-about .about-track .timeline__item:hover::before,
.page-about .about-track .timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(77, 240, 200, 0.14);
}

.page-about .about-track .timeline__item--amber::before {
  border-color: var(--amber);
}

.page-about .about-track .timeline__item--amber:hover::before,
.page-about .about-track .timeline__item--amber:focus-within::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 179, 71, 0.16);
}

.page-about .about-track .timeline__meta {
  margin: 0;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-track .timeline__title {
  margin: 7px 0 0;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.8vw, 27px);
  letter-spacing: -0.012em;
  color: var(--paper);
  transition: color 0.2s ease;
}

.page-about .about-track .timeline__item:hover .timeline__title,
.page-about .about-track .timeline__item:focus-within .timeline__title {
  color: var(--cyan);
}

.page-about .about-track .timeline__item--amber:hover .timeline__title,
.page-about .about-track .timeline__item--amber:focus-within .timeline__title {
  color: var(--amber);
}

.page-about .about-track .timeline__text {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.82;
}

/* ---------- 数据流程与内容栏目 ---------- */
.page-about .about-flow__grid {
  align-items: start;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 18px;
  background: var(--ink);
}

.page-about .about-flow__num {
  grid-row: span 2;
  font-family: var(--font-num);
  font-size: 19px;
  line-height: 1.35;
  color: var(--amber);
}

.page-about .about-flow__steps h3 {
  margin: 0;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-flow__steps p {
  grid-column: 2;
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-columns {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 46px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-columns__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--turf);
  text-decoration: none;
  transition: background-color 0.22s ease;
}

.page-about .about-columns__item:hover,
.page-about .about-columns__item:focus-visible {
  background: var(--ink-deep);
}

.page-about .about-columns__item h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-columns__item:hover h3 {
  color: var(--cyan);
}

.page-about .about-columns__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.78;
}

.page-about .about-columns__item .tag {
  align-self: flex-start;
}

/* ---------- 暖纸区块 ---------- */
.page-about .about-paper {
  position: relative;
  padding: clamp(26px, 4.5vw, 56px);
  background: var(--cream);
  color: var(--ink);
  border: 1px solid rgba(11, 31, 23, 0.14);
}

.page-about .about-paper::before {
  content: "";
  position: absolute;
  left: clamp(26px, 4.5vw, 56px);
  right: clamp(26px, 4.5vw, 56px);
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

.page-about .about-paper .kicker {
  color: #0B7A5C;
}

.page-about .about-paper h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(25px, 4vw, 38px);
  letter-spacing: -0.015em;
  line-height: 1.1;
  color: var(--ink);
}

.page-about .about-paper p {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-paper__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-paper__item {
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}

.page-about .about-paper__item h3 {
  margin: 0;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-paper__item p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 继续浏览 ---------- */
.page-about .about-next__title {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .about-next__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-next__link {
  display: block;
  padding: 20px 18px;
  background: var(--ink-deep);
  text-decoration: none;
  transition: background-color 0.22s ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--turf);
}

.page-about .about-next__name {
  display: block;
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color 0.2s ease;
}

.page-about .about-next__link:hover .about-next__name {
  color: var(--cyan);
}

.page-about .about-next__desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-scope__body {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .page-about .about-flow__grid {
    grid-template-columns: 1.25fr 0.75fr;
  }

  .page-about .about-paper__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-track {
    max-width: 72ch;
  }
}

@media (min-width: 1080px) {
  .page-about .about-columns {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-coverage__cell,
  .page-about .about-columns__item,
  .page-about .about-next__link,
  .page-about .about-track .timeline__item::before,
  .page-about .about-track .timeline__title,
  .page-about .about-principles .index-list__item {
    transition: none;
  }
}
</main>