/* =========================================================
   品牌文化 / 页面专属样式（作用域：.page-about）
   ========================================================= */

.page-about {
  --about-tl-w: 150px;
  --about-card-bg: var(--ink-2);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 64px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 92%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 92%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(23, 230, 210, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
  margin-top: 30px;
}

.page-about .about-coord {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-coord::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-h1 {
  margin: 0 0 18px;
  max-width: 20ch;
}

.page-about .about-lede {
  margin: 0 0 16px;
  max-width: 62ch;
  color: var(--paper);
}

.page-about .about-hero__text {
  margin: 0 0 26px;
  max-width: 60ch;
  color: var(--muted);
  line-height: 1.75;
}

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

/* 章节索引（首屏右侧） */

.page-about .about-index {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 22px 14px;
}

.page-about .about-index__head {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--violet);
  margin: 0 0 14px;
}

.page-about .about-index__head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__item + .about-index__item {
  border-top: 1px solid var(--line);
}

.page-about .about-index__link {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 13px 6px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--muted);
  transition: background var(--step-fast) var(--ease), color var(--step-fast) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--ink-3);
  color: var(--paper);
}

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

.page-about .about-index__label {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-index__hint {
  color: var(--muted);
  opacity: 0.75;
}

/* ---------- 通用章节节奏 ---------- */

.page-about .about-sec {
  padding: 64px 0;
}

.page-about .about-sec__head {
  max-width: 68ch;
  margin-bottom: 36px;
}

.page-about .section-index {
  display: inline-block;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-about .about-sec__lede {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .prose {
  color: var(--muted);
  line-height: 1.75;
  margin: 0 0 16px;
}

/* ---------- 品牌缘起 ---------- */

.page-about .about-origin {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-origin__body .section-title {
  margin: 0 0 18px;
}

.page-about .about-origin__pull {
  margin: 22px 0 0;
  padding: 16px 0 16px 18px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--paper);
}

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

.page-about .about-origin__media .media-caption {
  margin-top: 10px;
}

/* ---------- 赛季时间轴 ---------- */

.page-about .about-timeline-sec {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-tl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-tl__texture {
  max-width: 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-tl__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-tl__chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--ink-2);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color var(--step-fast) var(--ease), color var(--step-fast) var(--ease), background var(--step-fast) var(--ease);
}

.page-about .about-tl__chip .numeric {
  color: var(--cyan);
  font-size: 12px;
}

.page-about .about-tl__chip:hover,
.page-about .about-tl__chip:focus-visible {
  border-color: var(--cyan);
  color: var(--paper);
  background: var(--ink-3);
}

.page-about .about-tl__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 26px;
}

.page-about .about-tl__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), var(--violet) 52%, var(--line));
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: 34px;
}

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

.page-about .about-tl__dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(23, 230, 210, 0.12);
}

.page-about .about-tl__marker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .about-tl__num {
  font-size: 1.05rem;
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-about .about-tl__stage {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-tl__card {
  background: var(--about-card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  transition: background var(--step-fast) var(--ease), border-color var(--step-fast) var(--ease), transform var(--step-fast) var(--ease);
}

.page-about .about-tl__card:hover {
  background: var(--ink-3);
  border-color: rgba(23, 230, 210, 0.6);
  transform: translateY(-3px);
}

.page-about .about-tl__title {
  margin: 0 0 10px;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-tl__text {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .about-tl__stat {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-tl__stat .numeric {
  font-size: 1.5rem;
  color: var(--lime);
  margin-right: 6px;
}

.page-about .about-tl__extra {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 工作流程（奶油底跨页） ---------- */

.page-about .about-workshot {
  margin: 0 0 28px;
}

.page-about .about-workshot .media-frame {
  border: 1px solid var(--line);
}

.page-about .about-workshot .media-caption {
  margin-top: 10px;
}

.page-about .about-flow {
  padding: 30px 24px 26px;
}

.page-about .about-flow__coord {
  display: inline-block;
  color: var(--brown);
  opacity: 0.62;
  margin: 0 0 10px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1.28;
  color: var(--brown);
  letter-spacing: -0.01em;
}

.page-about .about-flow__svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 130px;
  margin: 10px 0 4px;
}

.page-about .about-flow__path {
  fill: none;
  stroke: var(--violet);
  stroke-width: 2;
  stroke-dasharray: 7 7;
  stroke-linecap: round;
}

.page-about .about-flow__node {
  fill: var(--paper);
  stroke: var(--orange);
  stroke-width: 3;
}

.page-about .about-flow__steps {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin: 18px 0 0;
  padding: 0;
}

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

.page-about .about-flow__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-about .about-flow__name {
  margin: 0 0 8px;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--brown);
  letter-spacing: 0.02em;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--brown);
  opacity: 0.82;
}

.page-about .about-flow__note {
  margin: 24px 0 0;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(42, 29, 22, 0.06);
  color: var(--brown);
  opacity: 0.78;
}

/* ---------- 团队剖面 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-role {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 22px 20px;
  transition: background var(--step-fast) var(--ease), transform var(--step-fast) var(--ease), border-color var(--step-fast) var(--ease);
}

.page-about .about-role:hover {
  background: var(--ink-3);
  transform: translateY(-4px);
}

.page-about .about-role--a {
  border-top: 3px solid var(--cyan);
}

.page-about .about-role--b {
  border-top: 3px solid var(--violet);
}

.page-about .about-role--c {
  border-top: 3px solid var(--amber);
}

.page-about .about-role__coord {
  margin: 0 0 12px;
  color: var(--muted);
  opacity: 0.8;
}

.page-about .about-role__name {
  margin: 0 0 12px;
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-role__count {
  display: block;
  font-size: clamp(2.2rem, 8vw, 2.9rem);
  line-height: 1;
  color: var(--lime);
  margin-bottom: 14px;
}

.page-about .about-role--b .about-role__count {
  color: var(--cyan);
}

.page-about .about-role--c .about-role__count {
  color: var(--amber);
}

.page-about .about-role__desc {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-role__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

/* ---------- 长期指标 ---------- */

.page-about .about-metrics-sec {
  border-top: 1px solid var(--line);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-metrics__intro .section-title {
  margin: 0 0 16px;
}

.page-about .about-metrics__aside {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
  color: var(--muted);
}

.page-about .about-metrics__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}

.page-about .about-metric {
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-areas:
    "no name"
    "no why";
  gap: 2px 14px;
  padding: 18px 16px 18px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--step-fast) var(--ease);
}

.page-about .about-metric:hover {
  background: rgba(198, 255, 79, 0.05);
}

.page-about .about-metric__no {
  grid-area: no;
  align-self: start;
  padding-top: 3px;
  font-size: 13px;
  color: var(--violet);
}

.page-about .about-metric__name {
  grid-area: name;
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .about-metric__why {
  grid-area: why;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 内容授权 ---------- */

.page-about .about-license {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
  overflow: hidden;
}

.page-about .about-license::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--violet), var(--cyan) 55%, var(--lime));
}

.page-about .about-license__head .section-title {
  margin: 0 0 16px;
}

.page-about .about-license__head .btn {
  margin-top: 8px;
}

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

.page-about .about-license__item {
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px 18px 16px;
  transition: border-color var(--step-fast) var(--ease), transform var(--step-fast) var(--ease);
}

.page-about .about-license__item:hover {
  border-color: var(--violet);
  transform: translateY(-2px);
}

.page-about .about-license__title {
  margin: 12px 0 8px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

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

.page-about .about-license__foot {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

/* ---------- 收束 ---------- */

.page-about .about-outro {
  position: relative;
  padding: 60px 0 72px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 18%, rgba(139, 92, 246, 0.18), transparent 58%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  overflow: hidden;
}

.page-about .about-outro__coord {
  display: inline-block;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-outro__text {
  margin: 0 0 26px;
  max-width: 58ch;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  line-height: 1.72;
  color: var(--paper);
}

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

/* =========================================================
   媒体查询
   ========================================================= */

@media (min-width: 720px) {
  .page-about .about-sec {
    padding: 82px 0;
  }

  .page-about .about-flow {
    padding: 42px 40px 38px;
  }

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

  .page-about .about-license {
    padding: 40px 38px;
  }

  .page-about .about-license__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-metrics__list {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 34px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 40px 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: start;
    margin-top: 42px;
  }

  .page-about .about-sec {
    padding: 96px 0;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-origin__media {
    margin-top: 34px;
  }

  .page-about .about-tl {
    grid-template-columns: var(--about-tl-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-tl__aside {
    position: sticky;
    top: 40px;
  }

  .page-about .about-tl__list {
    padding-left: 34px;
  }

  .page-about .about-tl__dot {
    left: -34px;
  }

  .page-about .about-tl__item:nth-child(odd) .about-tl__card {
    width: 90%;
  }

  .page-about .about-tl__item:nth-child(even) .about-tl__card {
    width: 78%;
    margin-left: 7%;
  }

  .page-about .about-team {
    grid-template-columns: 1.15fr 0.95fr 0.9fr;
    gap: 24px;
    align-items: start;
  }

  .page-about .about-role--b {
    margin-top: 46px;
  }

  .page-about .about-role--c {
    margin-top: 92px;
  }

  .page-about .about-metrics {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-metrics__intro {
    position: sticky;
    top: 40px;
  }

  .page-about .about-metrics__list {
    grid-template-columns: 1fr;
  }

  .page-about .about-metric {
    grid-template-columns: 52px 1fr;
  }

  .page-about .about-license {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 46px;
    padding: 52px 46px;
  }

  .page-about .about-outro {
    padding: 76px 0 92px;
  }
}

/* 时间轴摘要的悬停展开：仅在支持悬停的宽屏上收起 */

@media (hover: hover) and (min-width: 960px) {
  .page-about .about-tl__extra {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    transition:
      max-height var(--step-base) var(--ease),
      opacity var(--step-base) var(--ease),
      margin-top var(--step-base) var(--ease),
      padding-top var(--step-base) var(--ease);
  }

  .page-about .about-tl__item:hover .about-tl__extra,
  .page-about .about-tl__item:focus-within .about-tl__extra {
    max-height: 240px;
    opacity: 1;
    margin-top: 14px;
    padding-top: 12px;
    border-top-color: var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__card,
  .page-about .about-role,
  .page-about .about-license__item,
  .page-about .about-index__link,
  .page-about .about-tl__chip {
    transition: color var(--step-fast) linear, background-color var(--step-fast) linear, border-color var(--step-fast) linear;
    transform: none;
  }

  .page-about .about-tl__card:hover,
  .page-about .about-role:hover,
  .page-about .about-license__item:hover {
    transform: none;
  }
}