/* ===== 品牌历程页 ===== */
.page-about {
  --tl-accent-1: var(--aqua);
  --tl-accent-2: var(--violet);
  --tl-accent-3: var(--orange);
  --about-narrow: 68ch;
  position: relative;
  color: var(--white);
  padding-bottom: clamp(56px, 9vw, 120px);
  overflow-x: clip;
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 32px);
  padding-bottom: clamp(8px, 2vw, 20px);
}

/* ===== 首屏框景 ===== */
.page-about .about-hero {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding-top: clamp(12px, 2vw, 24px);
}

.page-about .about-hero__stage {
  position: relative;
  padding: clamp(26px, 5vw, 56px) clamp(20px, 4vw, 48px);
  background: linear-gradient(150deg, var(--stand) 0%, var(--ink) 82%);
  clip-path: polygon(0 var(--cut), var(--cut) 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-hero__stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: clamp(56px, 12vw, 120px);
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--violet) 70%, transparent);
}

.page-about .about-hero__label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__season {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lime);
  border: 1px solid rgba(140, 255, 90, .38);
  padding: 4px 10px;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: clamp(34px, 7vw, 84px);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -.03em;
}

.page-about .about-hero__title-em {
  color: var(--aqua);
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--mist);
}

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

.page-about .about-hero__figure {
  margin: 0;
  border-top: 1px solid var(--line);
  padding-top: clamp(14px, 2vw, 22px);
}

.page-about .about-hero__figure img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(.85) contrast(1.05);
}

/* ===== 起点 ===== */
.page-about .about-origin {
  padding-top: clamp(48px, 8vw, 96px);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(16px, 3vw, 32px);
}

.page-about .about-origin__body {
  max-width: var(--about-narrow);
}

.page-about .about-origin__body p {
  margin: 0 0 1.1em;
  color: var(--mist);
}

.page-about .about-origin__body h2 {
  margin-bottom: .5em;
}

.page-about .about-origin__pull {
  margin-top: 1.4em;
  padding-left: 16px;
  border-left: 2px solid var(--aqua);
  color: var(--white) !important;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.6;
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  position: relative;
  padding-top: clamp(56px, 9vw, 112px);
}

.page-about .about-timeline__head {
  position: relative;
  max-width: var(--about-narrow);
  margin-bottom: clamp(34px, 5vw, 60px);
}

.page-about .about-timeline__head h2 {
  margin: .4em 0 .5em;
}

.page-about .about-timeline__intro {
  margin: 0;
  color: var(--mist);
}

.page-about .about-timeline__wm {
  position: absolute;
  right: -0.04em;
  top: -0.35em;
  z-index: 0;
  font-family: var(--font-mono);
  font-size: clamp(150px, 30vw, 300px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(42, 71, 107, .6);
  pointer-events: none;
  user-select: none;
}

.page-about .about-timeline__list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-node {
  position: relative;
  padding-left: clamp(30px, 5vw, 46px);
  padding-bottom: clamp(24px, 3.5vw, 42px);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--tl-accent-1);
  box-shadow: 0 0 0 4px rgba(43, 224, 200, .16);
  transition: box-shadow .25s var(--ease);
}

.page-about .tl-node::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(42, 71, 107, .25));
}

.page-about .tl-node:last-child::after {
  display: none;
}

.page-about .tl-node:nth-child(2)::before { background: #3FCBC6; box-shadow: 0 0 0 4px rgba(63, 203, 198, .16); }
.page-about .tl-node:nth-child(3)::before { background: #5AA9D8; box-shadow: 0 0 0 4px rgba(90, 169, 216, .16); }
.page-about .tl-node:nth-child(4)::before { background: var(--tl-accent-2); box-shadow: 0 0 0 4px rgba(122, 92, 255, .18); }
.page-about .tl-node:nth-child(5)::before { background: var(--tl-accent-3); box-shadow: 0 0 0 4px rgba(255, 122, 47, .18); }

.page-about .tl-node:hover::before,
.page-about .tl-node:focus-within::before {
  box-shadow: 0 0 0 7px rgba(43, 224, 200, .2);
}

.page-about .tl-node__d {
  border: 1px solid transparent;
  border-top-color: var(--line);
  padding-top: 12px;
  transition: border-color .25s var(--ease);
}

.page-about .tl-node__d[open] {
  border-color: var(--line);
  padding: 12px clamp(12px, 2vw, 20px) clamp(14px, 2vw, 20px);
  background: rgba(16, 32, 58, .72);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .tl-node__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  outline: none;
}

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

.page-about .tl-node__summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .tl-node__d[open] .tl-node__summary::after {
  content: "收起";
  color: var(--aqua);
  border-color: var(--aqua);
}

.page-about .tl-node__summary:hover::after,
.page-about .tl-node__summary:focus-visible::after {
  color: var(--aqua);
  border-color: var(--aqua);
}

.page-about .tl-node__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .tl-node__title {
  margin: 0;
  font-size: clamp(18px, 2.6vw, 26px);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -.005em;
}

.page-about .tl-node__era {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
  margin-left: auto;
  order: 3;
}

.page-about .tl-node__body {
  max-width: var(--about-narrow);
  padding-top: 12px;
}

.page-about .tl-node__body p {
  margin: 0 0 .9em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .tl-node__body p:last-child {
  margin-bottom: 0;
}

/* ===== 团队 ===== */
.page-about .about-team {
  padding-top: clamp(56px, 9vw, 112px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-bottom: clamp(36px, 5vw, 60px);
}

.page-about .about-team__copy {
  max-width: var(--about-narrow);
}

.page-about .about-team__copy h2 {
  margin: .4em 0 .6em;
}

.page-about .about-team__copy p {
  margin: 0 0 1em;
  color: var(--mist);
}

.page-about .about-team__figure {
  margin: 0;
  position: relative;
  align-self: start;
}

.page-about .about-team__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(43, 224, 200, .2);
  pointer-events: none;
}

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

/* 团队分工横条 */
.page-about .team-bar {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  border-top: 1px solid var(--line);
  padding-top: clamp(22px, 3vw, 34px);
}

.page-about .team-bar__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(42, 71, 107, .45);
  outline: none;
  cursor: default;
}

.page-about .team-bar__row:focus-visible {
  border-bottom-color: var(--aqua);
}

.page-about .team-bar__key {
  grid-column: 1;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--white);
}

.page-about .team-bar__val {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--aqua);
  white-space: nowrap;
}

.page-about .team-bar__track {
  grid-column: 1 / -1;
  position: relative;
  height: 6px;
  background: var(--board);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  transition: filter .25s var(--ease);
}

.page-about .team-bar__fill--edit { width: 32%; background: linear-gradient(90deg, var(--aqua), #3FCBC6); }
.page-about .team-bar__fill--data { width: 22%; background: linear-gradient(90deg, #5AA9D8, var(--violet)); }
.page-about .team-bar__fill--ops  { width: 46%; background: linear-gradient(90deg, var(--orange), #FFB37A); }

.page-about .team-bar__row:hover .team-bar__fill,
.page-about .team-bar__row:focus-within .team-bar__fill {
  filter: brightness(1.25);
}

.page-about .team-bar__hint {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .3s var(--ease), opacity .3s var(--ease), margin .3s var(--ease);
}

.page-about .team-bar__row:hover .team-bar__hint,
.page-about .team-bar__row:focus-within .team-bar__hint {
  max-height: 120px;
  opacity: 1;
  margin-top: 4px;
}

/* ===== 覆盖版图 ===== */
.page-about .about-reach {
  padding-top: clamp(56px, 9vw, 112px);
}

.page-about .about-reach__head {
  max-width: var(--about-narrow);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-reach__head h2 {
  margin: .4em 0 .5em;
}

.page-about .about-reach__intro {
  margin: 0;
  color: var(--mist);
}

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

.page-about .about-reach__figure {
  margin: 0;
  position: relative;
}

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

.page-about .about-reach__cols {
  display: grid;
  gap: clamp(16px, 2.5vw, 24px);
}

.page-about .reach-col {
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--stand);
  border-left: 3px solid var(--aqua);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .reach-col:hover {
  background: var(--board);
}

.page-about .reach-col--a { border-left-color: var(--aqua); }
.page-about .reach-col--b { border-left-color: var(--violet); }
.page-about .reach-col--c { border-left-color: var(--orange); }

.page-about .reach-col__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
  margin-bottom: 8px;
}

.page-about .reach-col__title {
  margin: 0 0 .45em;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 500;
}

.page-about .reach-col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ===== 合作与来源 ===== */
.page-about .about-partner {
  padding-top: clamp(56px, 9vw, 112px);
}

.page-about .about-partner__grid {
  display: grid;
  gap: clamp(16px, 3vw, 32px);
  border-top: 1px solid var(--line);
  padding-top: clamp(24px, 4vw, 44px);
}

.page-about .about-partner__body {
  max-width: var(--about-narrow);
}

.page-about .about-partner__body h2 {
  margin: .4em 0 .6em;
}

.page-about .about-partner__body p {
  margin: 0 0 1em;
  color: var(--mist);
}

.page-about .about-partner__body strong {
  color: var(--lime);
  font-weight: 600;
}

.page-about .about-partner__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1.4em;
}

/* ===== 被记录下来的时刻 ===== */
.page-about .about-moments {
  padding-top: clamp(56px, 9vw, 112px);
}

.page-about .about-moments__head {
  max-width: var(--about-narrow);
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-moments__head h2 {
  margin: .4em 0 0;
}

.page-about .about-moments__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .moment {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(14px, 2.4vw, 26px);
  align-items: start;
  padding: clamp(16px, 2.4vw, 24px) clamp(14px, 2vw, 22px);
  background: rgba(16, 32, 58, .55);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: background .25s var(--ease);
}

.page-about .moment:hover {
  background: var(--board);
}

.page-about .moment__num {
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1;
  color: var(--aqua);
  opacity: .9;
}

.page-about .moment:nth-child(2) .moment__num { color: var(--lime); }
.page-about .moment:nth-child(3) .moment__num { color: var(--violet); }
.page-about .moment:nth-child(4) .moment__num { color: var(--orange); }

.page-about .moment__title {
  margin: 0 0 .4em;
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 500;
  line-height: 1.4;
}

.page-about .moment__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-moments__foot {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--line);
  max-width: 62ch;
}

.page-about .about-moments__foot p {
  margin: 0 0 1.4em;
  color: var(--white);
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.7;
}

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

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-about .about-origin__grid,
  .page-about .about-partner__grid {
    grid-template-columns: minmax(120px, 200px) minmax(0, 1fr);
    gap: clamp(20px, 3.5vw, 48px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }

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

  .page-about .reach-col--a {
    grid-column: 1 / -1;
  }

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

  .page-about .team-bar__row {
    grid-template-columns: minmax(110px, 150px) minmax(0, 1fr) auto;
  }

  .page-about .team-bar__key { grid-column: 1; }
  .page-about .team-bar__track { grid-column: 2; }
  .page-about .team-bar__val { grid-column: 3; }
  .page-about .team-bar__hint { grid-column: 2 / -1; }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .reach-col--a {
    grid-column: auto;
  }

  .page-about .tl-node {
    padding-left: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node::before,
  .page-about .tl-node__d,
  .page-about .team-bar__fill,
  .page-about .team-bar__hint,
  .page-about .reach-col,
  .page-about .moment {
    transition: none;
  }
}
</main>