/* ============================================================
   团队与品牌 / about
   作用域：.page-about
   ============================================================ */

.page-about {
  --about-rail-w: 200px;
  --about-gap: clamp(32px, 5vw, 56px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-top {
  padding-top: calc(var(--header-h) + 22px);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--ink-2);
}

.page-about .breadcrumb__link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(44px, 7vw, 88px) 0 clamp(44px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: 4%;
  width: clamp(180px, 34vw, 440px);
  height: 132%;
  background: linear-gradient(180deg, rgba(255, 106, 0, 0.2), rgba(106, 61, 245, 0.12) 62%, transparent 88%);
  transform: skewX(-10deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__stripes {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -10deg,
    transparent 0 72px,
    rgba(255, 106, 0, 0.045) 72px 80px
  );
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__title {
  margin: 12px 0 20px;
  max-width: 22ch;
}

.page-about .about-hero__accent {
  color: var(--orange);
  display: inline-block;
  transform: skewX(-3deg);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  color: var(--text-dim);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(30px, 4.5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-2);
  border: 1px solid var(--ink-2);
  max-width: 900px;
}

.page-about .about-hero__stats li {
  background: var(--ink-0);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-hero__num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-hero__label {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* ---------- 章节目录 ---------- */
.page-about .about-rail {
  position: sticky;
  top: var(--header-h);
  inset-inline: auto;
  writing-mode: horizontal-tb;
  width: auto;
  height: auto;
  max-height: none;
  z-index: 6;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  padding: 8px 0;
  margin-inline: calc(var(--gut) * -1);
  padding-inline: var(--gut);
  background: var(--ink-0);
  border-bottom: 1px solid var(--ink-2);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-family: var(--font-editorial);
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--text-dim);
  border-left: 2px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-rail__link span {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--text);
  border-left-color: var(--neon);
  outline: none;
}

.page-about .about-rail__link[aria-current="true"],
.page-about .about-rail__link.is-active {
  color: var(--text);
  border-left-color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(38px, 5.5vw, 64px) 0;
  border-top: 1px solid var(--ink-2);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 28px);
  align-items: start;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-about .about-chapter__num {
  font-family: var(--font-display);
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--orange);
  display: inline-block;
  transform: skewX(-4deg);
}

.page-about .about-chapter__num::after {
  content: "";
  display: inline-block;
  width: clamp(16px, 3vw, 40px);
  height: 2px;
  margin-left: 10px;
  vertical-align: middle;
  background: var(--orange-deep);
}

.page-about .about-chapter__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-chapter > p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-chapter > p.about-chapter__lede {
  font-size: 17.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-chapter__text--tail {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-inline-link {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--neon);
}

/* ---------- 图片通用 ---------- */
.page-about .about-banner,
.page-about .about-coverage__fig,
.page-about .about-split__aside {
  margin: 0;
}

.page-about .about-banner img,
.page-about .about-coverage__fig img,
.page-about .about-split__aside img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 01 时间轴 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-2);
  border: 1px solid var(--ink-2);
}

.page-about .about-tl__item {
  position: relative;
  background: var(--ink-0);
  padding: 22px 18px 26px;
  transition: background 0.28s var(--ease);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--orange);
  transition: height 0.32s var(--ease);
}

.page-about .about-tl__item:hover,
.page-about .about-tl__item:focus-within {
  background: var(--ink-1);
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-within::before {
  height: 100%;
}

.page-about .about-tl__year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-tl__title {
  margin: 0 0 8px;
  font-family: var(--font-editorial);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .about-banner {
  margin-top: clamp(26px, 4vw, 40px);
  aspect-ratio: 1600 / 700;
}

/* ---------- 02 团队分工 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink-2);
}

.page-about .about-roster__row {
  display: grid;
  gap: 6px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ink-2);
}

.page-about .about-roster__role {
  font-family: var(--font-editorial);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-roster__desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-roster__meta {
  justify-self: start;
  align-self: start;
  padding: 3px 9px;
  font-size: 12px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  color: var(--text-dim);
  border: 1px solid var(--violet);
}

.page-about .about-split__aside {
  aspect-ratio: 1 / 1;
}

/* ---------- 03 内容流程（深紫分区） ---------- */
.page-about .about-chapter--violet {
  background: var(--violet-deep);
  border-top: 0;
  margin: clamp(28px, 4vw, 48px) 0;
  padding: clamp(66px, 9vw, 104px) clamp(20px, 3.6vw, 52px);
  clip-path: polygon(0 30px, 100% 0, 100% calc(100% - 30px), 0 100%);
}

.page-about .about-chapter--violet .about-chapter__title {
  color: var(--text);
}

.page-about .about-chapter--violet .about-chapter__num::after {
  background: var(--orange);
}

.page-about .about-chapter--violet > p.about-chapter__lede,
.page-about .about-chapter--violet > p {
  color: rgba(244, 245, 248, 0.8);
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .about-steps .step {
  position: relative;
  padding-top: 20px;
  border-top: 2px solid var(--orange);
}

.page-about .about-steps .step__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-size: clamp(36px, 4.6vw, 54px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-about .about-steps .step__title {
  margin: 0 0 8px;
  font-family: var(--font-editorial);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-steps .step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 245, 248, 0.72);
}

/* ---------- 04 区域服务 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-coverage__fig {
  aspect-ratio: 1400 / 900;
}

.page-about .about-coverage__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-2);
  border: 1px solid var(--ink-2);
}

.page-about .about-coverage__list li {
  background: var(--ink-0);
  padding: 16px 18px 18px;
}

.page-about .about-coverage__list strong {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-editorial);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-coverage__list span {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-coop {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--ink-2);
  border: 1px solid var(--ink-2);
}

.page-about .about-coop__card {
  display: block;
  position: relative;
  background: var(--ink-0);
  padding: clamp(22px, 3vw, 32px);
  text-decoration: none;
  color: inherit;
  transition: background 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .about-coop__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background: var(--orange);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  opacity: 0.75;
}

.page-about .about-coop__card:hover,
.page-about .about-coop__card:focus-visible {
  background: var(--ink-1);
  box-shadow: inset 0 0 0 2px var(--neon);
  outline: none;
}

.page-about .about-coop__title {
  margin: 0 0 10px;
  font-family: var(--font-editorial);
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
}

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

.page-about .about-coop__go {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  transition: color 0.25s var(--ease);
}

.page-about .about-coop__card:hover .about-coop__go,
.page-about .about-coop__card:focus-visible .about-coop__go {
  color: var(--neon);
}

/* ---------- 06 联系我们 ---------- */
.page-about .about-route {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ink-2);
}

.page-about .about-route__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ink-2);
}

.page-about .about-route__label {
  font-family: var(--font-editorial);
  font-size: 15.5px;
  color: var(--text);
}

.page-about .about-route__link {
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

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

.page-about .about-contact {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 32px);
  background: var(--ink-2);
  border: 1px solid var(--ink-2);
}

.page-about .about-contact__item {
  background: var(--ink-0);
  padding: 22px 20px 24px;
}

.page-about .about-contact__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-editorial);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .about-contact__value {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 17px);
  letter-spacing: 0.01em;
  color: var(--text);
  word-break: break-all;
}

.page-about .about-contact__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 移动端 / 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-tl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-roster__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-roster__meta {
    grid-column: 2;
  }

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

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

@media (min-width: 860px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 1100px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: clamp(40px, 4.5vw, 72px);
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    overflow: visible;
    top: calc(var(--header-h) + 36px);
    margin-inline: 0;
    padding: 2px 0;
    background: transparent;
    border-bottom: 0;
    border-left: 1px solid var(--ink-2);
  }

  .page-about .about-rail__link {
    padding: 9px 0 9px 14px;
    font-size: 14px;
  }

  .page-about .about-rail__link span {
    display: inline;
  }

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

  .page-about .about-roster__row {
    grid-template-columns: 120px minmax(0, 1fr) auto;
  }

  .page-about .about-roster__meta {
    grid-column: 3;
  }
}