/* ===== 品牌总览 · page-about ===== */

.page-about {
  --about-section-y: clamp(52px, 8vw, 100px);
  background: var(--paper);
  color: var(--ink);
}

/* --- 首屏 --- */
.page-about .about-hero {
  padding: clamp(18px, 4vw, 40px) 0 clamp(34px, 5vw, 56px);
}

.page-about .about-hero .breadcrumb {
  margin: 0 0 clamp(18px, 3vw, 30px);
}

.page-about .about-intro {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-intro__text h1 {
  font-family: var(--font-narrow);
  font-weight: 800;
  font-size: clamp(2rem, 5.4vw, 3.35rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 10px 0 18px;
  max-width: 22ch;
}

.page-about .about-intro__text h1::after {
  content: "";
  display: block;
  width: clamp(56px, 14vw, 110px);
  height: 6px;
  margin-top: 18px;
  background: var(--signal);
}

.page-about .about-intro .lede {
  font-family: var(--font-serif);
  font-size: clamp(1.04rem, 1.9vw, 1.22rem);
  line-height: 1.7;
  color: var(--ink-2);
  margin: 0 0 18px;
  max-width: 46ch;
}

.page-about .about-intro__text p:not(.lede):not(.eyebrow) {
  margin: 0 0 14px;
  line-height: 1.82;
  color: var(--ink-2);
  max-width: 60ch;
}

.page-about .about-intro__figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-intro__cap {
  font-size: 0.82rem;
  line-height: 1.62;
  color: var(--muted);
  border-left: 3px solid var(--signal);
  padding-left: 10px;
}

@media (min-width: 900px) {
  .page-about .about-intro {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
}

/* --- 数据条 --- */
.page-about .about-figures {
  margin-top: clamp(30px, 5vw, 54px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background: var(--ink);
  color: var(--paper);
  border: var(--line);
  box-shadow: var(--hard);
}

.page-about .about-figure {
  padding: 18px 20px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-figure + .about-figure {
  border-top: 1px solid rgba(244, 246, 245, 0.16);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.6vw, 2.7rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--signal);
}

.page-about .about-figure--lead .about-figure__num {
  font-size: clamp(2.5rem, 7vw, 4rem);
}

.page-about .about-figure__label {
  font-size: 0.82rem;
  line-height: 1.55;
  color: rgba(244, 246, 245, 0.72);
}

@media (min-width: 780px) {
  .page-about .about-figures {
    grid-template-columns: 1.35fr 1fr 1fr 1fr;
  }
  .page-about .about-figure + .about-figure {
    border-top: 0;
    border-left: 1px solid rgba(244, 246, 245, 0.18);
  }
}

/* --- 章节索引 --- */
.page-about .about-index {
  margin-top: clamp(26px, 4vw, 42px);
}

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

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border: 1px solid var(--cloud);
  background: var(--paper);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

/* --- 通用章节 --- */
.page-about .about-section {
  padding: var(--about-section-y) 0;
}

.page-about .about-chapter {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 10px;
}

.page-about .about-split {
  display: grid;
  gap: clamp(22px, 3.5vw, 34px);
}

.page-about .about-split__aside .section__title {
  font-size: clamp(1.28rem, 2.6vw, 1.7rem);
  line-height: 1.32;
  margin: 0 0 14px;
}

.page-about .about-aside-note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--muted);
  border-top: 2px solid var(--signal);
  padding-top: 12px;
  max-width: 32ch;
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 268px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-split__aside {
    position: sticky;
    top: 28px;
  }
}

/* --- 发展时间轴 --- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px dashed var(--mist);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 40px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 7px;
  width: 16px;
  height: 16px;
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: 2px 2px 0 var(--ink);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--signal);
}

.page-about .about-timeline__when {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 9px;
  background: var(--amber);
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-size: clamp(1.02rem, 1.9vw, 1.2rem);
  font-weight: 700;
  line-height: 1.48;
  color: var(--ink);
}

.page-about .about-timeline__item p:not(.about-timeline__when) {
  margin: 0;
  line-height: 1.82;
  color: var(--ink-2);
  max-width: 62ch;
}

/* --- 角色区 --- */
.page-about .role-list {
  margin-top: clamp(24px, 3.5vw, 38px);
  display: grid;
  gap: 14px;
}

.page-about .role-card {
  border: var(--line);
  background: var(--cloud);
  box-shadow: 3px 3px 0 var(--ink);
}

.page-about .role-card > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  font-weight: 700;
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  color: var(--ink);
  transition: background 0.18s ease, color 0.18s ease;
}

.page-about .role-card > summary::-webkit-details-marker {
  display: none;
}

.page-about .role-card > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--ink-2);
}

.page-about .role-card[open] > summary {
  background: var(--indigo);
  color: var(--paper);
}

.page-about .role-card[open] > summary::after {
  content: "–";
  color: var(--amber);
}

.page-about .role-card[open] {
  background: var(--paper);
  box-shadow: var(--hard);
}

.page-about .role-card__body {
  padding: 8px 18px 20px;
}

.page-about .role-card__body ul {
  margin: 0;
  padding-left: 18px;
}

.page-about .role-card__body li {
  margin-bottom: 8px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .role-card__body li::marker {
  color: var(--signal);
}

.page-about .role-card__body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

/* --- 深青数据分区 --- */
.page-about .about-deep {
  background: var(--ink-2);
  color: var(--paper);
}

.page-about .about-deep .about-chapter {
  color: var(--amber);
}

.page-about .about-deep .section__title {
  color: var(--paper);
}

.page-about .about-deep__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-deep__grid > div > p {
  margin: 0;
  line-height: 1.82;
  color: rgba(244, 246, 245, 0.84);
  max-width: 58ch;
}

.page-about .about-deep__grid figure {
  margin: 0;
}

.page-about .about-deep .img-frame {
  border: 2px solid rgba(244, 246, 245, 0.55);
}

@media (min-width: 900px) {
  .page-about .about-deep__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: center;
  }
}

.page-about .about-source-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-source-list li {
  border-left: 3px solid var(--signal);
  padding: 6px 0 6px 14px;
  font-size: 0.95rem;
  line-height: 1.72;
  color: rgba(244, 246, 245, 0.86);
}

.page-about .about-checks {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  gap: 16px;
}

.page-about .about-check {
  border: 2px solid rgba(244, 246, 245, 0.45);
  background: rgba(11, 27, 43, 0.34);
  padding: 18px;
}

.page-about .about-check__num {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-check p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(244, 246, 245, 0.82);
}

@media (min-width: 780px) {
  .page-about .about-checks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* --- 运营中心 --- */
.page-about .about-ops {
  background: var(--paper);
}

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

@media (min-width: 720px) {
  .page-about .about-ops-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-ops-card {
  border: var(--line);
  background: var(--cloud);
  padding: 20px;
  box-shadow: 3px 3px 0 var(--ink);
}

.page-about .about-ops-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-ops-card p {
  margin: 0;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-ops .about-split__aside {
  background: var(--ink);
  border: var(--line);
  box-shadow: var(--hard-s);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-ops .about-split__aside .about-chapter {
  color: var(--amber);
}

.page-about .about-ops .about-split__aside .section__title {
  color: var(--paper);
}

.page-about .about-ops .about-split__aside .about-aside-note {
  color: rgba(244, 246, 245, 0.78);
}

.page-about .about-fold {
  margin-top: 16px;
  border: var(--line);
  background: var(--paper);
}

.page-about .about-fold > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-fold > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-fold > summary::before {
  content: "▸";
  color: var(--signal);
  font-size: 0.9rem;
  transition: transform 0.2s ease;
}

.page-about .about-fold[open] > summary::before {
  transform: rotate(90deg);
}

.page-about .about-fold__body {
  padding: 0 18px 18px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-fold__body p {
  margin: 0;
}

.page-about .about-fold__body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

/* --- 合作对接 --- */
.page-about .about-partner {
  background: var(--indigo);
  color: var(--paper);
}

.page-about .about-partner .about-chapter {
  color: var(--amber);
}

.page-about .about-partner .section__title {
  color: var(--paper);
  max-width: 26ch;
}

.page-about .about-partner__grid {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-partner__grid figure {
  margin: 0;
}

.page-about .about-partner .img-frame {
  border: 2px solid rgba(244, 246, 245, 0.5);
}

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

.page-about .about-partner-list li {
  position: relative;
  padding-left: 22px;
  line-height: 1.78;
  color: rgba(244, 246, 245, 0.86);
}

.page-about .about-partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 10px;
  background: var(--signal);
  border: 1px solid var(--paper);
}

@media (min-width: 880px) {
  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* --- 赛季回顾 --- */
.page-about .about-review-grid {
  margin-top: clamp(24px, 3.5vw, 38px);
  display: grid;
  gap: 16px;
}

.page-about .about-review-card {
  border: var(--line);
  border-left: 8px solid var(--amber);
  background: var(--cloud);
  padding: 20px 22px;
}

.page-about .about-review-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-review-card p {
  margin: 0;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-review-card a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

@media (min-width: 780px) {
  .page-about .about-review-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* --- 结尾动作区 --- */
.page-about .about-cta {
  background: var(--signal);
  color: var(--ink);
  border-top: var(--line);
}

.page-about .about-cta__inner {
  padding: clamp(34px, 6vw, 62px) 0;
  display: grid;
  gap: 22px;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-cta p {
  margin: 0;
  line-height: 1.72;
  color: rgba(11, 27, 43, 0.84);
  max-width: 58ch;
}

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

.page-about .about-cta__actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border: 2px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 4px 4px 0 rgba(11, 27, 43, 0.32);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.page-about .about-cta__actions a + a {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

.page-about .about-cta__actions a:hover,
.page-about .about-cta__actions a:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(11, 27, 43, 0.32);
}

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) auto;
    align-items: center;
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

/* --- 窄屏收敛 --- */
@media (max-width: 560px) {
  .page-about .about-figures {
    box-shadow: var(--hard-s);
  }
  .page-about .about-timeline {
    padding-left: 20px;
  }
  .page-about .about-timeline__item::before {
    left: -29px;
    width: 14px;
    height: 14px;
  }
  .page-about .role-card,
  .page-about .about-ops-card {
    box-shadow: 2px 2px 0 var(--ink);
  }
  .page-about .about-cta__actions a {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .role-card > summary,
  .page-about .about-fold > summary::before,
  .page-about .about-cta__actions a {
    transition: none;
  }
}