/* ===== 品牌档案页 · 页面作用域 ===== */
.page-about {
  --about-line: rgba(18, 16, 14, 0.12);
  --about-shadow: 0 22px 48px -34px rgba(14, 43, 36, 0.6);
  background: var(--warm);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .about-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 12px;
}

.page-about .about-kicker--light {
  color: var(--lime);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--deep);
  color: var(--paper);
  padding: calc(var(--header-h) + 28px) 0 48px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -18%;
  bottom: -34%;
  width: 70vw;
  height: 70vw;
  max-width: 700px;
  max-height: 700px;
  background: radial-gradient(circle at 40% 40%, rgba(123, 224, 74, 0.22), transparent 62%);
  border-radius: 58% 42% 46% 54% / 48% 58% 42% 52%;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -26%;
  top: -12%;
  width: 62vw;
  height: 62vw;
  max-width: 560px;
  max-height: 560px;
  background: radial-gradient(circle at 50% 50%, rgba(255, 90, 54, 0.18), transparent 66%);
  border-radius: 44% 56% 62% 38% / 60% 44% 56% 40%;
  pointer-events: none;
}

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

.page-about .about-hero .crumbs {
  margin-bottom: 26px;
}

.page-about .about-hero .crumbs__link {
  color: rgba(247, 242, 232, 0.7);
}

.page-about .about-hero .crumbs__link:hover,
.page-about .about-hero .crumbs__link:focus-visible {
  color: var(--lime);
}

.page-about .about-hero .crumbs__item {
  color: rgba(247, 242, 232, 0.5);
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 10vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 16ch;
}

.page-about .about-hero__title br {
  display: none;
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 242, 232, 0.82);
  max-width: 60ch;
  margin: 0 0 34px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding-top: 26px;
  border-top: 1px solid var(--line-deep);
}

.page-about .about-stat {
  background: rgba(247, 242, 232, 0.06);
  border: 1px solid var(--line-deep);
  border-radius: var(--r-md);
  padding: 16px 16px 14px;
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(247, 242, 232, 0.6);
  margin: 0 0 6px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 8vw, 42px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
  margin: 0;
}

.page-about .about-stat__num sup {
  font-size: 0.42em;
  vertical-align: super;
  color: rgba(247, 242, 232, 0.7);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: var(--paper);
  padding: 56px 0;
  position: relative;
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(18, 16, 14, 0.028) 0px,
    rgba(18, 16, 14, 0.028) 1px,
    transparent 1px,
    transparent 5px
  );
  pointer-events: none;
}

.page-about .about-origin__inner {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .about-origin__text p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  margin: 0 0 16px;
  max-width: 66ch;
}

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

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

/* ---------- 六类资料 ---------- */
.page-about .about-scope {
  background: var(--warm);
  padding: 56px 0;
}

.page-about .about-scope__head {
  margin-bottom: 30px;
}

.page-about .about-scope__lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-mid);
  max-width: 62ch;
  margin: 12px 0 0;
}

.page-about .about-cats {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-cat {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  padding: 18px 18px 16px;
  box-shadow: var(--about-shadow);
  overflow: hidden;
}

.page-about .about-cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--deep);
}

.page-about .about-cat--a::before { background: var(--deep); }
.page-about .about-cat--b::before { background: var(--lime); }
.page-about .about-cat--c::before { background: var(--orange); }
.page-about .about-cat--d::before { background: var(--blue); }
.page-about .about-cat--e::before { background: var(--orange-deep); }
.page-about .about-cat--f::before { background: var(--lime-soft); }

.page-about .about-cat__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-mid);
  display: block;
  margin-bottom: 8px;
}

.page-about .about-cat__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 8px;
}

.page-about .about-cat__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
  margin: 0;
}

.page-about .about-scope__note {
  background: var(--paper);
  border: 1px dashed rgba(14, 43, 36, 0.3);
  border-radius: var(--r-lg);
  padding: 22px 20px;
}

.page-about .about-scope__note .hand-note {
  display: block;
  margin: 0 0 10px;
  color: var(--orange-deep);
}

.page-about .about-scope__note p:last-child {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--deep);
  color: var(--paper);
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-team::after {
  content: "";
  position: absolute;
  right: -16%;
  bottom: -30%;
  width: 54vw;
  height: 54vw;
  max-width: 480px;
  max-height: 480px;
  background: radial-gradient(circle at 50% 50%, rgba(123, 224, 74, 0.16), transparent 64%);
  border-radius: 52% 48% 40% 60% / 44% 56% 44% 56%;
  pointer-events: none;
}

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

.page-about .about-team__head {
  margin-bottom: 28px;
}

.page-about .about-team__head .section-head__kicker {
  color: var(--lime);
}

.page-about .about-team__head .section-head__title {
  color: var(--paper);
}

.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .about-team__card {
  background: rgba(247, 242, 232, 0.07);
  border: 1px solid var(--line-deep);
  border-radius: var(--r-lg);
  padding: 22px 20px;
  transition: transform 0.32s ease, background-color 0.32s ease, border-color 0.32s ease;
}

.page-about .about-team__card--b {
  background: rgba(123, 224, 74, 0.1);
}

.page-about .about-team__card--c {
  background: rgba(255, 90, 54, 0.1);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(123, 224, 74, 0.5);
}

.page-about .about-team__card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.3;
  margin: 14px 0 10px;
  color: var(--paper);
}

.page-about .about-team__card p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 242, 232, 0.8);
  margin: 0 0 12px;
}

.page-about .about-team__detail {
  border-top: 1px solid var(--line-deep);
  padding-top: 12px;
  font-size: 13.5px;
  color: rgba(247, 242, 232, 0.66) !important;
  margin-bottom: 0 !important;
}

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

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  background: var(--paper);
  padding: 56px 0;
}

.page-about .about-versions__head {
  margin-bottom: 26px;
}

.page-about .about-versions__lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
  margin: 12px 0 0;
}

.page-about .about-timeline {
  position: relative;
  border-left: 2px solid rgba(14, 43, 36, 0.18);
  padding-left: 22px;
  margin-left: 4px;
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 14px;
  background: var(--warm);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 24px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--deep);
  z-index: 1;
}

.page-about .tl-item[open]::before {
  background: var(--lime);
  border-color: var(--deep);
}

.page-about .tl-sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-about .tl-sum:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: -3px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--paper);
  background: var(--deep);
  border-radius: var(--r-sm);
  padding: 5px 10px;
  flex: 0 0 auto;
}

.page-about .tl-item[open] .tl-year {
  background: var(--orange);
}

.page-about .tl-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.35;
  color: var(--ink);
  flex: 1 1 auto;
}

.page-about .tl-mark {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  position: relative;
}

.page-about .tl-mark::before,
.page-about .tl-mark::after {
  content: "";
  position: absolute;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.page-about .tl-mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}

.page-about .tl-mark::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.page-about .tl-item[open] .tl-mark::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-about .tl-body {
  padding: 0 18px 18px;
}

.page-about .tl-body p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-mid);
  margin: 0;
  max-width: 68ch;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  background: var(--warm);
  padding: 56px 0;
}

.page-about .about-partners__inner {
  display: grid;
  gap: 28px;
}

.page-about .about-partners__lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin: 14px 0 22px;
  max-width: 58ch;
}

.page-about .about-honors {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-honor {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--paper);
  border-left: 4px solid var(--orange);
  border-radius: var(--r-sm);
  padding: 14px 16px;
  box-shadow: var(--about-shadow);
}

.page-about .about-honor p {
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  color: var(--ink);
}

.page-about .about-partners__more {
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-mid);
  margin: 0;
}

.page-about .about-partners__more a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.page-about .about-partners__more a:hover,
.page-about .about-partners__more a:focus-visible {
  color: var(--blue-deep);
}

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

/* ---------- 长期维护 ---------- */
.page-about .about-commit {
  background: var(--deep);
  color: var(--paper);
  padding: 56px 0 64px;
}

.page-about .about-commit__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-commit__panel {
  background: rgba(247, 242, 232, 0.06);
  border: 1px solid var(--line-deep);
  border-radius: var(--r-xl);
  padding: 26px 22px;
}

.page-about .about-commit__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 6.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .about-commit__text {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(247, 242, 232, 0.82);
  margin: 0 0 22px;
  max-width: 64ch;
}

.page-about .about-commit__list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-commit__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(247, 242, 232, 0.86);
}

.page-about .about-commit__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime);
}

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

.page-about .about-commit__side {
  border-left: 3px solid var(--lime);
  padding-left: 18px;
}

.page-about .about-commit__note {
  display: block;
  margin: 0 0 12px;
  color: var(--lime);
}

.page-about .about-commit__side-text {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(247, 242, 232, 0.78);
  margin: 0 0 16px;
}

.page-about .about-commit__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 224, 74, 0.5);
  padding-bottom: 2px;
}

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

/* ---------- 图片容器微调 ---------- */
.page-about .media-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--lime-mist), rgba(201, 232, 184, 0.25));
}

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

.page-about .media-frame--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .media-frame--square img {
  aspect-ratio: 3 / 2;
}

.page-about .media-frame__caption {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mid);
  padding: 12px 4px 0;
  background: transparent;
}

.page-about .about-team .media-frame__caption {
  color: rgba(247, 242, 232, 0.6);
}

/* ---------- 回到顶部 ---------- */
.page-about .to-top {
  position: fixed;
  right: 18px;
  bottom: 84px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line-deep);
  background: var(--deep);
  color: var(--lime);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  z-index: 40;
}

.page-about .to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .to-top:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 52px) 0 68px;
  }

  .page-about .about-hero__title br {
    display: inline;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-origin,
  .page-about .about-scope,
  .page-about .about-team,
  .page-about .about-versions,
  .page-about .about-partners,
  .page-about .about-commit {
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-team__card--b {
    transform: translateY(18px);
  }

  .page-about .about-team__card--b:hover,
  .page-about .about-team__card--b:focus-within {
    transform: translateY(12px);
  }

  .page-about .about-partners__inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: 40px;
  }

  .page-about .about-commit__inner {
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-commit__panel {
    padding: 36px 34px;
    border-radius: var(--r-xl);
  }

  .page-about .about-origin__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .page-about .about-scope__note {
    display: flex;
    gap: 26px;
    align-items: baseline;
    padding: 24px 28px;
  }

  .page-about .about-scope__note .hand-note {
    flex: 0 0 auto;
    margin: 0;
  }

  .page-about .about-timeline {
    padding-left: 30px;
  }

  .page-about .tl-item::before {
    left: -38px;
  }

  .page-about .about-team__figure,
  .page-about .about-partners__figure {
    max-width: 560px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 72px) 0 88px;
  }

  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    grid-template-areas:
      "crumbs crumbs"
      "kicker kicker"
      "title stats"
      "lead stats";
    column-gap: 48px;
    align-items: start;
  }

  .page-about .about-hero .crumbs { grid-area: crumbs; }
  .page-about .about-hero__kicker { grid-area: kicker; }
  .page-about .about-hero__title { grid-area: title; margin-bottom: 24px; }
  .page-about .about-hero__lead { grid-area: lead; margin-bottom: 0; }

  .page-about .about-hero__stats {
    grid-area: stats;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: none;
    padding-top: 0;
    align-self: center;
  }

  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 0.52fr) minmax(0, 0.48fr);
    align-items: center;
    gap: 52px;
  }

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

  .page-about .about-versions .shell {
    display: grid;
    grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
    column-gap: 48px;
    align-items: start;
  }

  .page-about .about-versions__head {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    margin-bottom: 0;
  }

  .page-about .about-timeline {
    margin-left: 0;
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 0.38fr);
  }

  .page-about .about-commit__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }

  .page-about .to-top {
    right: 32px;
    bottom: 40px;
  }
}