/* ===== 品牌介绍页 · page-about ===== */
.page-about {
  --about-rail-w: 208px;
  --about-rule: 1px solid var(--line);
  display: block;
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  padding-block: 16px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease;
}

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

/* --- 首屏 --- */
.page-about .about-hero {
  border-bottom: var(--about-rule);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(36, 64, 92, 0.34) 0 1px,
    transparent 1px 96px
  );
}

.page-about .about-hero__inner {
  padding-block: clamp(24px, 4vw, 48px) clamp(32px, 5vw, 64px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(38px, 9vw, 96px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.98;
  color: var(--white);
  max-width: 14ch;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.78;
  color: var(--body-text);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-hero__stats > div {
  background: var(--ink-900);
  padding: 16px 16px 18px;
}

.page-about .about-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-hero__stats dd {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--body-text);
}

.page-about .about-hero__stats .num {
  display: inline-block;
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

/* --- 主体骨架：左目录 + 右正文 --- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(32px, 5vw, 64px) clamp(48px, 7vw, 96px);
}

@media (min-width: 1040px) {
  .page-about .about-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 76px);
  }
}

/* --- 左侧目录 --- */
.page-about .about-rail {
  position: sticky;
  top: var(--header-offset);
  z-index: 6;
  background: var(--ink-900);
  border-bottom: var(--about-rule);
  padding-block: 8px 10px;
  min-width: 0;
}

.page-about .about-rail ul {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail ul::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-rail__no {
  font-size: 10px;
  color: var(--blue);
  opacity: 0.75;
}

@media (min-width: 1040px) {
  .page-about .about-rail {
    border-bottom: 0;
    padding-block: 4px 0;
  }

  .page-about .about-rail ul {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-rail a {
    display: flex;
    width: 100%;
    padding: 11px 0;
    border-bottom: var(--about-rule);
    white-space: normal;
    line-height: 1.5;
  }

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

/* --- 章节通用 --- */
.page-about .about-section {
  border-top: var(--about-rule);
  padding-block: clamp(32px, 4.5vw, 56px);
  scroll-margin-top: calc(var(--header-offset) + 56px);
}

.page-about .about-flow > .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section--last {
  border-bottom: var(--about-rule);
  margin-bottom: 0;
}

.page-about .section-head {
  display: grid;
  gap: 6px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

@media (min-width: 760px) {
  .page-about .section-head {
    grid-template-columns: 48px minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 18px;
  }
}

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

.page-about .section-head__title {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--white);
}

.page-about .section-head__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--body-text);
}

/* --- 图片位 --- */
.page-about .about-figure {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
}

.page-about .about-figure img,
.page-about .about-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--about-rule);
}

.page-about .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-band {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

/* --- 时间线 --- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: var(--about-rule);
  display: grid;
  gap: clamp(26px, 3.6vw, 40px);
}

.page-about .about-timeline li {
  position: relative;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 9px;
  width: 9px;
  height: 9px;
  transform: translateX(-50%);
  background: var(--ink-900);
  border: 1px solid var(--cyan);
}

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

.page-about .about-timeline h3 {
  margin: 10px 0 8px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-text);
}

/* --- 团队分工 --- */
.page-about .about-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .about-roster__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding: 18px 12px;
  border-bottom: var(--about-rule);
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.page-about .about-roster__count {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-roster__role {
  grid-column: 2;
  grid-row: 1;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-roster__desc {
  grid-column: 2;
  grid-row: 2;
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
  transition: color 160ms ease;
}

.page-about .about-roster__row:hover,
.page-about .about-roster__row:focus-within {
  background: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-about .about-roster__row:hover .about-roster__desc {
  color: var(--body-text);
}

@media (min-width: 760px) {
  .page-about .about-roster__row {
    grid-template-columns: 76px 180px minmax(0, 1fr);
    gap: 0 22px;
    padding: 20px 16px;
  }

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

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

  .page-about .about-roster__desc {
    grid-column: 3;
    grid-row: 1;
    margin-top: 0;
  }
}

/* --- 生产流程 --- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .about-step {
  display: flex;
  gap: 16px;
  padding: clamp(18px, 2.6vw, 26px) 12px;
  border-bottom: var(--about-rule);
  transition: background-color 160ms ease;
}

.page-about .about-step:hover {
  background: var(--ink-800);
}

.page-about .about-step__no {
  flex: 0 0 auto;
  width: 2.4em;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  opacity: 0.5;
  transition: opacity 160ms ease;
}

.page-about .about-step:hover .about-step__no {
  opacity: 1;
}

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

.page-about .about-step__body h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-step__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

/* --- 覆盖范围 --- */
.page-about .about-leagues {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
}

.page-about .about-leagues li {
  padding: 8px 16px;
  border: var(--about-rule);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--white);
  background: var(--ink-800);
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.page-about .about-leagues li:hover {
  border-color: var(--cyan);
  background: var(--ink-700);
  color: var(--cyan);
}

.page-about .about-seasons {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-season {
  display: grid;
  gap: 8px;
  padding: 16px 14px;
  background: var(--ink-800);
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.page-about .about-season .num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--white);
}

.page-about .about-season__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 160ms ease;
}

.page-about .about-season:hover {
  background: var(--ink-700);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.page-about .about-season:hover .about-season__meta {
  color: var(--cyan);
}

@media (min-width: 760px) {
  .page-about .about-seasons {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-seasons {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

/* --- 三条原则 --- */
.page-about .about-principles {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-principles li {
  background: var(--ink-900);
  padding: clamp(20px, 3vw, 30px);
  transition: background-color 160ms ease;
}

.page-about .about-principles li:hover {
  background: var(--ink-800);
}

.page-about .about-principles__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-principles h3 {
  margin: 14px 0 10px;
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-principles p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

@media (min-width: 860px) {
  .page-about .about-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* --- 行业记录 --- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-metric {
  background: var(--ink-900);
  padding: clamp(18px, 2.6vw, 26px) 16px;
}

.page-about .about-metric dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-metric dd {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--body-text);
}

.page-about .about-metric .num {
  display: inline-block;
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
}

@media (min-width: 760px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* --- 继续了解 --- */
.page-about .about-next {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-next a {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--ink-900);
  text-decoration: none;
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  background: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-about .about-next__k {
  color: var(--blue);
}

.page-about .about-next__t {
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--white);
  transition: color 160ms ease;
}

.page-about .about-next a:hover .about-next__t,
.page-about .about-next a:focus-visible .about-next__t {
  color: var(--cyan);
}

.page-about .about-next__d {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  transition: color 160ms ease;
}

.page-about .about-next a:hover .about-next__d,
.page-about .about-next a:focus-visible .about-next__d {
  color: var(--body-text);
}

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

  .page-about .about-next li:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next li:last-child {
    grid-column: auto;
  }
}

/* --- 窄屏收口 --- */
@media (max-width: 480px) {
  .page-about .about-hero__title {
    font-size: clamp(34px, 11vw, 48px);
  }

  .page-about .about-step {
    gap: 12px;
    padding-inline: 0;
  }

  .page-about .about-step__no {
    width: 2em;
  }
}

/* --- 动效降级 --- */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}