/* ========================================================
   品牌与历程 / page-about
   ======================================================== */

.page-about {
  --about-soft: #12203A;
  --about-dim: rgba(53, 230, 208, 0.14);
  padding-bottom: clamp(40px, 7vw, 96px);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.75;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(76px, 11vw, 116px);
  padding-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--line);
}

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

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

.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-soft);
}

/* ---------- 通用标题组 ---------- */
.page-about .about-head {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.22;
  font-size: clamp(1.45rem, 3.2vw, 2.3rem);
  color: var(--text-strong);
  margin: 10px 0 0;
  text-wrap: balance;
}

/* ---------- 01 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(12px, 2vw, 28px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: start;
}

.page-about .about-hero__lead {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.12;
  font-size: clamp(1.9rem, 4.8vw, 3.3rem);
  color: var(--text-strong);
  margin: 0;
  text-wrap: balance;
}

.page-about .about-hero .lede {
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 54ch;
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 6px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-metric__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-metric__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--cyan);
}

.page-about .about-metric__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-hero__figure {
  margin: 0;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--edge);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 200px;
  max-height: 62vh;
  object-fit: cover;
}

/* ---------- 目录 ---------- */
.page-about .about-index {
  margin-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 22, 38, 0.65), rgba(7, 12, 24, 0));
}

.page-about .about-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding: 16px var(--gutter);
  max-width: var(--page-max);
  margin-inline: auto;
}

.page-about .about-index__label {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 3px 0;
  font-size: 14px;
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--ease), border-color var(--ease);
}

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

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
}

/* ---------- 02 主张 ---------- */
.page-about .about-belief__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-belief__prose p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-about .about-belief__prose::before {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin-bottom: 22px;
  background: var(--orange);
}

.page-about .about-belief__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-belief__item {
  position: relative;
  background: var(--panel);
  padding: 20px 20px 22px;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no desc";
  gap: 4px 14px;
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-belief__item:hover {
  background: var(--about-soft);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-about .about-belief__no {
  grid-area: no;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--orange);
}

.page-about .about-belief__title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .about-belief__desc {
  grid-area: desc;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-belief__item--mint .about-belief__no {
  color: var(--mint);
}

.page-about .about-belief__item--mint:hover {
  box-shadow: inset 2px 0 0 var(--mint);
}

/* ---------- 03 收录范围 ---------- */
.page-about .about-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-board__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 18px 26px;
  background: var(--panel);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-board__item:hover,
.page-about .about-board__item:focus-within {
  background: var(--about-soft);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.page-about .about-board__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-board__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--text-strong);
}

.page-about .about-board__count {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 4.4vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-board__unit {
  font-size: 0.42em;
  margin-left: 3px;
  color: var(--muted);
}

.page-about .about-board__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-soft);
}

/* 暖纸色补充板 */
.page-about .about-paper {
  margin-top: clamp(24px, 3.5vw, 40px);
  padding: clamp(20px, 3vw, 32px);
  color: var(--paper-ink);
  display: grid;
  gap: 16px;
}

.page-about .about-paper__label {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: rgba(16, 20, 24, 0.62);
}

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

.page-about .about-paper__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(16, 20, 24, 0.14);
}

.page-about .about-paper__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-paper__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper-ink);
}

.page-about .about-paper__text {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(16, 20, 24, 0.78);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 clamp(28px, 4vw, 48px);
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 200px;
  max-height: 56vh;
  object-fit: cover;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__prose {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 46ch;
}

.page-about .about-team__roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 26px;
  background: var(--panel);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-role:hover {
  background: var(--about-soft);
  box-shadow: inset 2px 0 0 var(--orange);
}

.page-about .about-role__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-role__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------- 05 时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  margin: 0 0 0 5px;
  padding: 0 0 0 clamp(22px, 3.5vw, 44px);
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 44px);
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(22px, 3.5vw, 44px) - 5px);
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background var(--ease), border-color var(--ease);
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--text-soft);
  margin-bottom: 12px;
  transition: color var(--ease);
}

.page-about .about-tl__item:hover .about-tl__year {
  color: var(--cyan);
}

.page-about .about-tl__body {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: clamp(16px, 2.4vw, 26px);
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}

.page-about .about-tl__item:hover .about-tl__body {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: var(--edge);
}

.page-about .about-tl__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 62ch;
}

.page-about .about-tl__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(30, 43, 68, 0.9);
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  transition: color var(--ease);
}

.page-about .about-tl__item:hover .about-tl__note {
  color: var(--mint);
}

/* ---------- 06 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4.5vw, 52px);
  align-items: start;
}

.page-about .about-partners__prose {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 58ch;
}

.page-about .about-partners__list {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px 20px 22px;
  background: var(--panel);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-partner:hover {
  background: var(--about-soft);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-about .about-partner__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  line-height: 1.8;
  color: var(--cyan);
}

.page-about .about-partner__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-partners__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 58ch;
}

.page-about .about-partners__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-dim);
  transition: border-color var(--ease);
}

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

.page-about .about-partners__figure {
  margin: 0;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 240px;
  object-fit: cover;
}

/* ---------- 收束 ---------- */
.page-about .about-cta__panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(26px, 4vw, 52px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(53, 230, 208, 0.12), rgba(7, 12, 24, 0) 58%),
    var(--panel);
}

.page-about .about-cta__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}

.page-about .about-cta__desc {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 56ch;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px 12px;
  }

  .page-about .about-index__inner {
    gap: 8px 16px;
  }

  .page-about .about-index__list {
    gap: 4px 14px;
  }
}

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

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

  .page-about .about-paper__list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 0 16px 0 0;
    border-bottom: 0;
    border-right: 1px solid rgba(16, 20, 24, 0.14);
  }

  .page-about .about-paper__list li:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-belief__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(36px, 5vw, 72px);
  }

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

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

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

  .page-about .about-hero__figure {
    height: 100%;
  }

  .page-about .about-hero__figure img {
    height: 100%;
    max-height: none;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-partners__figure {
    height: 100%;
  }

  .page-about .about-partners__figure img {
    height: 100%;
    object-fit: cover;
  }
}

@media (min-width: 1100px) {
  .page-about .about-board {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}