/* ================= 品牌档案页 ================= */
.page-about {
  --about-rail: 200px;
  --about-tone: var(--red);
  --about-ink-soft: #4A4038;
  --about-paper: #FBF6EA;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--bar) + 28px) 0 48px;
  background:
    radial-gradient(circle at 86% 8%, rgba(99, 224, 192, 0.16), transparent 44%),
    radial-gradient(circle at 12% 96%, rgba(217, 58, 43, 0.22), transparent 46%),
    linear-gradient(158deg, var(--dusk) 0%, var(--night) 56%, var(--night-deep) 100%);
  color: var(--cream);
  border-bottom: var(--line) solid var(--saffron);
}

.page-about .about-hero__trail {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  max-width: 900px;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  margin-bottom: 22px;
}

.page-about .breadcrumbs a {
  color: var(--blue-lite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease, color 120ms ease;
}

.page-about .breadcrumbs a:hover {
  border-bottom-color: var(--blue-lite);
}

.page-about .breadcrumbs--ondark span {
  color: var(--snow-dim);
}

.page-about .about-hero__stamp {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--spark);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: #FBF6EA;
}

.page-about .about-hero .lede {
  margin: 0 0 30px;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--snow);
}

.page-about .about-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid rgba(185, 195, 206, 0.28);
}

.page-about .about-hero__marks li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--snow);
}

.page-about .about-hero__marks .mono {
  font-size: 22px;
  color: var(--saffron);
}

/* ---------- 主体骨架：左侧目录 + 右侧长流 ---------- */
.page-about .about-body {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-rail {
  padding: 22px 0 4px;
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--about-ink-soft);
}

.page-about .about-rail__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-height: 44px;
  padding: 10px 12px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink);
  background: var(--about-paper);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.page-about .about-rail__link:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--ink);
  background: #fff;
}

.page-about .about-rail__link:focus-visible,
.page-about .tl-item:focus-visible,
.page-about .next-card:focus-visible {
  outline: 2px solid var(--spark);
  outline-offset: 3px;
}

.page-about .about-rail__no {
  font-size: 13px;
  color: var(--about-tone);
}

.page-about .about-rail__label {
  font-size: 14px;
}

.page-about .about-rail__item:nth-child(1) { --about-tone: var(--red); }
.page-about .about-rail__item:nth-child(2) { --about-tone: var(--blue); }
.page-about .about-rail__item:nth-child(3) { --about-tone: var(--saffron); }
.page-about .about-rail__item:nth-child(4) { --about-tone: var(--green); }
.page-about .about-rail__item:nth-child(5) { --about-tone: var(--red); }
.page-about .about-rail__item:nth-child(6) { --about-tone: var(--blue); }

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: 44px 0;
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--bar) + 16px);
}

.page-about .about-flow > .about-sec:nth-of-type(1) { --sec: var(--red); }
.page-about .about-flow > .about-sec:nth-of-type(2) { --sec: var(--blue); }
.page-about .about-flow > .about-sec:nth-of-type(3) { --sec: var(--saffron); }
.page-about .about-flow > .about-sec:nth-of-type(4) { --sec: var(--green); }
.page-about .about-flow > .about-sec:nth-of-type(5) { --sec: var(--red); }
.page-about .about-flow > .about-sec:nth-of-type(6) { --sec: var(--blue); }

.page-about .about-sec__head {
  position: relative;
  padding-left: 18px;
  border-left: 6px solid var(--sec, var(--red));
  margin-bottom: 28px;
}

.page-about .about-sec__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--sec, var(--red));
  margin-bottom: 6px;
}

.page-about .about-sec__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.005em;
}

.page-about .about-sec__sub {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  color: var(--about-ink-soft);
}

/* ---------- 01 档案卡 ---------- */
.page-about .dossier {
  margin: 0;
  background: var(--about-paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .dossier__row {
  display: grid;
  gap: 4px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(23, 18, 14, 0.14);
}

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

.page-about .dossier__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-ink-soft);
}

.page-about .dossier__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
}

/* ---------- 02 三条线 ---------- */
.page-about .lines {
  display: grid;
  gap: 24px;
}

.page-about .lines__cards {
  display: grid;
  gap: 20px;
}

.page-about .line-card {
  padding: 22px 20px;
  background: var(--about-paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
  border-left-width: 8px;
}

.page-about .line-card--editor { border-left-color: var(--red); }
.page-about .line-card--data { border-left-color: var(--saffron); }
.page-about .line-card--eng { border-left-color: var(--blue); }

.page-about .line-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .line-card__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.005em;
}

.page-about .line-card__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .line-card__meta {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid rgba(23, 18, 14, 0.16);
}

.page-about .line-card__meta dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--about-ink-soft);
}

.page-about .line-card__meta dd {
  margin: 0 0 8px;
  font-size: 14px;
}

.page-about .line-card__meta dd:last-child {
  margin-bottom: 0;
}

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

.page-about .media {
  display: block;
  overflow: hidden;
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--paper-shade);
}

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

.page-about .media__caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--about-ink-soft);
  background: var(--about-paper);
  border-top: 2px solid var(--ink);
}

/* ---------- 03 赛季纪年 ---------- */
.page-about .timeline-wrap {
  position: relative;
  padding-left: 4px;
}

.page-about .tl-curve {
  position: absolute;
  left: 0;
  top: 0;
  width: 70px;
  height: 100%;
  pointer-events: none;
}

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

.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 62px;
  cursor: default;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 10px;
  width: 13px;
  height: 13px;
  background: var(--about-paper);
  border: 3px solid var(--ink);
  transform: rotate(45deg);
}

.page-about .tl-item:nth-child(odd)::before { background: var(--saffron); }
.page-about .tl-item:nth-child(even)::before { background: var(--about-paper); }

.page-about .tl-item__season {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red);
}

.page-about .tl-item__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
}

.page-about .tl-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .tl-item__extra {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  color: var(--about-ink-soft);
  transition: max-height 260ms ease, opacity 260ms ease, margin-top 260ms ease;
}

.page-about .tl-item:hover .tl-item__extra,
.page-about .tl-item:focus-within .tl-item__extra {
  max-height: 140px;
  margin-top: 8px;
  opacity: 1;
}

/* ---------- 04 年产出 ---------- */
.page-about .scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .scale-cell {
  display: grid;
  gap: 4px;
  padding: 20px;
  background: var(--night);
  color: var(--cream);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .scale-cell__num {
  font-size: 40px;
  line-height: 1.05;
  font-weight: 700;
  color: var(--saffron);
  letter-spacing: 0.02em;
}

.page-about .scale-cell:nth-child(2n) .scale-cell__num { color: var(--spark); }
.page-about .scale-cell:nth-child(3n) .scale-cell__num { color: #FBF6EA; }

.page-about .scale-cell__label {
  font-size: 16px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .scale-cell__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--snow-dim);
}

/* ---------- 05 合作与荣誉 ---------- */
.page-about .partners {
  display: grid;
  gap: 24px;
}

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

.page-about .partners__body {
  display: grid;
  gap: 20px;
}

.page-about .partner-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-item {
  padding: 16px 18px;
  background: var(--about-paper);
  border: var(--line) solid var(--ink);
  border-top-width: 8px;
}

.page-about .partner-item--green { border-top-color: var(--green); }
.page-about .partner-item--blue { border-top-color: var(--blue); }
.page-about .partner-item--saffron { border-top-color: var(--saffron); }

.page-about .partner-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .partner-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .honor {
  padding: 18px 20px;
  background: var(--dusk);
  color: var(--cream);
  border-left: 6px solid var(--saffron);
}

.page-about .honor__line {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--snow);
}

.page-about .honor__line:last-child {
  margin-bottom: 0;
}

.page-about .honor__line .mono {
  color: var(--saffron);
  font-size: 13px;
}

.page-about .honor a {
  color: #FBF6EA;
  border-bottom: 1px solid var(--saffron);
  text-decoration: none;
}

.page-about .honor a:hover {
  color: var(--spark);
  border-bottom-color: var(--spark);
}

/* ---------- 06 一条集锦 ---------- */
.page-about .clip-media {
  margin: 0 0 24px;
}

.page-about .clip-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: clip;
}

.page-about .clip-step {
  position: relative;
  padding: 18px 18px 18px 20px;
  background: var(--about-paper);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .clip-step__no {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--cream);
  background: var(--ink);
}

.page-about .clip-step h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .clip-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
}

.page-about .next-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .next-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px 14px;
  min-height: 44px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--ink);
  background: var(--cream);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.page-about .next-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--ink);
  background: #fff;
}

.page-about .next-card__kicker {
  grid-column: 1;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red);
}

.page-about .next-card__title {
  grid-column: 1;
  font-size: 15px;
  line-height: 1.6;
}

.page-about .next-card__arrow {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-size: 20px;
  color: var(--blue);
}

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 320ms ease, transform 320ms ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .tl-item__extra {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .dossier__row {
    grid-template-columns: 160px 1fr;
    align-items: baseline;
    gap: 20px;
  }

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

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

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

  .page-about .about-sec__head {
    padding-left: 22px;
  }
}

/* ---------- 桌面：左右分栏 ---------- */
@media (min-width: 1024px) {
  .page-about .section {
    padding: 64px 0;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail) 1fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--bar) + 24px);
    padding: 28px 0 0;
    border-bottom: 0;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    width: 100%;
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    border-left: 6px solid var(--about-tone);
    padding: 10px 8px 10px 12px;
  }

  .page-about .about-rail__link:hover {
    transform: none;
    box-shadow: none;
    background: var(--about-paper);
    border-color: transparent;
    border-left-color: var(--about-tone);
  }

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

  .page-about .lines {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .lines__media {
    position: sticky;
    top: calc(var(--bar) + 24px);
  }

  .page-about .tl-item {
    padding-left: 78px;
  }

  .page-about .tl-item__title {
    font-size: 20px;
  }

  .page-about .scale-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .scale-cell__num {
    font-size: 52px;
  }

  .page-about .partners {
    grid-template-columns: 5fr 7fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .clip-steps {
    grid-template-columns: repeat(5, 1fr);
  }

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

@media (min-width: 1280px) {
  .page-about .scale-cell__num {
    font-size: 60px;
  }
}