/* ==========================================================
   品牌历程页 · page-about
   ========================================================== */

.page-about {
  --about-line-soft: rgba(30, 74, 60, .58);
  --about-cut: 22px;
  position: relative;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 3.5vw, 36px);
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-about .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin: 0 10px;
  color: var(--line);
}

.page-about .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4.5vw, 56px) 0 clamp(34px, 6vw, 80px);
}

.page-about .about-hero__lead {
  max-width: 820px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 640px;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--paper-2);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  position: relative;
  margin: clamp(30px, 5vw, 56px) 0 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 规模数据带 ---------- */
.page-about .about-scale {
  padding: 0 0 clamp(34px, 5vw, 64px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: clamp(20px, 3vw, 40px) 0 clamp(50px, 7vw, 96px);
}

.page-about .about-timeline__head {
  max-width: 720px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-timeline__head .section-title {
  margin: 12px 0 14px;
}

.page-about .timeline {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-2) 42%, var(--line) 100%);
  opacity: .78;
}

.page-about .timeline__item {
  position: relative;
  padding-left: 42px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 200, .1);
  z-index: 1;
}

.page-about .timeline__card {
  position: relative;
  padding: clamp(20px, 3vw, 28px) clamp(20px, 3vw, 28px) clamp(20px, 3vw, 28px) clamp(22px, 3.4vw, 32px);
  background: linear-gradient(155deg, rgba(18, 61, 48, .92) 0%, rgba(11, 43, 34, .98) 60%);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .timeline__card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .timeline__title {
  margin: 12px 0 8px;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 展开控件 ---------- */
.page-about .about-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--cyan);
  font: inherit;
  font-size: 13px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-toggle::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
}

.page-about .about-toggle:hover,
.page-about .about-toggle:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 242, 200, .08);
}

.page-about .about-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  background: rgba(53, 242, 200, .12);
}

.page-about .about-toggle[aria-expanded="true"]::after {
  content: "–";
}

.page-about .about-panel {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper-2);
}

.page-about .about-panel ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.page-about .about-panel li::marker {
  color: var(--cyan);
}

/* ---------- 赛事覆盖 ---------- */
.page-about .about-coverage {
  padding: clamp(40px, 6vw, 88px) 0;
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
  background: linear-gradient(180deg, rgba(11, 43, 34, .55) 0%, rgba(5, 20, 15, 0) 72%);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
}

.page-about .about-coverage__num {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(56px, 10vw, 96px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-coverage__num-label {
  margin: 8px 0 0;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-coverage__main .section-title {
  margin: 0 0 14px;
}

.page-about .about-coverage__main > p {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-2);
}

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

.page-about .coverage-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .coverage-list__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .coverage-list__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(44px, 6.5vw, 96px) 0;
}

.page-about .about-team__head {
  max-width: 720px;
  margin-bottom: clamp(30px, 4.5vw, 52px);
}

.page-about .about-team__head .section-title {
  margin: 12px 0 14px;
}

.page-about .about-team__layout {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  padding: 22px 20px 22px 24px;
  background: rgba(11, 43, 34, .72);
  border-left: 2px solid var(--cyan-2);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .team-card:hover {
  background: rgba(18, 61, 48, .88);
  border-left-color: var(--cyan);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-card__unit {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .team-card__name {
  margin: 12px 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

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

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 认证流程 ---------- */
.page-about .about-cert {
  padding: clamp(44px, 6.5vw, 96px) 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-cert__head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-cert__head .section-title {
  margin: 12px 0 14px;
}

.page-about .about-cert__media {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .about-cert__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
}

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

.page-about .cert-step {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .cert-step__idx {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--yellow);
}

.page-about .cert-step__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .cert-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honor {
  padding: clamp(40px, 6vw, 84px) 0;
  background: linear-gradient(135deg, rgba(18, 61, 48, .6) 0%, rgba(5, 20, 15, 0) 68%);
}

.page-about .about-honor__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-honor__intro .section-title {
  margin: 12px 0 0;
}

.page-about .about-honor__intro p {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-2);
}

.page-about .about-honor__tags {
  display: grid;
  gap: 14px;
}

.page-about .honor-tag {
  position: relative;
  background: rgba(11, 43, 34, .78);
  border: 1px solid var(--line);
}

.page-about .honor-tag::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 20px solid var(--cyan);
  border-left: 20px solid transparent;
  pointer-events: none;
}

.page-about .honor-tag__btn {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 20px 22px;
  background: transparent;
  border: 0;
  border-radius: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  transition: background .2s var(--ease);
}

.page-about .honor-tag__btn:hover,
.page-about .honor-tag__btn:focus-visible {
  background: rgba(53, 242, 200, .06);
}

.page-about .honor-tag__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--yellow);
}

.page-about .honor-tag__name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .honor-tag .about-panel {
  margin: 0;
  padding: 0 22px 20px;
  border-top: 0;
  font-size: 14px;
}

.page-about .honor-tag .about-panel p {
  margin: 0;
  color: var(--paper-2);
  line-height: 1.8;
}

/* ---------- 下一赛季 ---------- */
.page-about .about-next {
  padding: clamp(44px, 6.5vw, 96px) 0 0;
}

.page-about .about-next__head {
  max-width: 680px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-next__head .section-title {
  margin: 12px 0 14px;
}

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

.page-about .next-card {
  padding: clamp(22px, 3vw, 30px);
  background: var(--ink-900);
}

.page-about .next-card__idx {
  display: block;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .next-card h3 {
  margin: 16px 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .next-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(40px, 6vw, 72px) 0 clamp(48px, 7vw, 104px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: clamp(26px, 4vw, 44px);
  background: linear-gradient(120deg, rgba(31, 168, 138, .22) 0%, rgba(11, 43, 34, .9) 55%, rgba(5, 20, 15, .95) 100%);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
  color: var(--paper);
}

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

/* ==========================================================
   断点
   ========================================================== */

@media (min-width: 640px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .coverage-list li {
    grid-template-columns: minmax(150px, 4fr) minmax(0, 8fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .cert-step {
    grid-template-columns: 76px minmax(150px, 4fr) minmax(0, 8fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

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

@media (min-width: 900px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(180px, 3fr) minmax(0, 9fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .timeline {
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .timeline::before {
    left: 50%;
    margin-left: -1px;
    top: 12px;
    bottom: 12px;
  }

  .page-about .timeline__item {
    width: calc(50% - 62px);
    padding-left: 0;
  }

  .page-about .timeline__item:nth-child(odd) {
    justify-self: start;
  }

  .page-about .timeline__item:nth-child(even) {
    justify-self: end;
  }

  .page-about .timeline__item::before {
    left: auto;
    right: -69px;
  }

  .page-about .timeline__item:nth-child(even)::before {
    right: auto;
    left: -69px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toggle,
  .page-about .team-card,
  .page-about .honor-tag__btn,
  .page-about .breadcrumbs a {
    transition: none;
  }
}