.page-about {
  --about-rule: 1px solid rgba(20, 17, 15, 0.14);
  --about-ink-soft: rgba(20, 17, 15, 0.62);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(34px, 5vw, 68px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(233, 180, 76, 0.16), rgba(247, 243, 234, 0) 58%),
    var(--paper);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
    114deg,
    transparent 0 48.4%,
    rgba(20, 17, 15, 0.055) 48.4% 48.75%,
    transparent 48.75% 100%
  );
}

.page-about .about-hero .container {
  position: relative;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  align-items: end;
  margin-top: clamp(16px, 3vw, 34px);
}

.page-about .about-hero__title {
  margin: clamp(10px, 2vw, 16px) 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(36px, 7.6vw, 88px);
  line-height: 0.97;
  letter-spacing: -0.03em;
}

.page-about .about-hero__title em {
  font-style: normal;
  position: relative;
  display: inline-block;
}

.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.04em;
  height: 0.08em;
  background: var(--orange);
}

.page-about .about-hero__aside .lede {
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.85;
  max-width: 46ch;
  color: var(--ink-2);
  margin: 0;
}

.page-about .about-hero__aside .note {
  margin: clamp(12px, 2vw, 18px) 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  color: var(--slate);
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.7;
}

.page-about .about-hero__mark {
  display: none;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  padding-bottom: clamp(48px, 6vw, 96px);
}

/* ---------- 左侧索引 ---------- */
.page-about .about-rail {
  padding-top: 4px;
}

.page-about .about-rail .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 132px;
  padding: 9px 13px;
  background: var(--paper-warm);
  border-radius: 2px 16px 2px 16px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s ease, color 0.25s ease;
}

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

.page-about .about-rail__label {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 13px;
  line-height: 1.35;
}

.page-about .about-rail__meta {
  font-family: var(--font-serif);
  font-size: 11.5px;
  color: var(--slate);
}

.page-about .about-rail__link[aria-current="true"] {
  background: var(--orange-soft);
  color: var(--ink);
}

/* ---------- 右侧叙事 ---------- */
.page-about .about-main {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(26px, 4vw, 48px) 0;
  border-top: var(--about-rule);
  scroll-margin-top: clamp(72px, 14vh, 120px);
}

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

.page-about .about-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-sec__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
  padding: 3px 9px;
  border: 1px solid rgba(232, 93, 42, 0.42);
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(23px, 3.3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-text {
  max-width: var(--measure);
  margin: 0 0 1em;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.9;
  color: var(--ink-2);
}

.page-about .about-text:last-of-type {
  margin-bottom: 0;
}

.page-about .about-inline-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover {
  background: var(--orange-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-sec__media {
  margin: 0 0 clamp(18px, 3vw, 30px);
  border-radius: 2px 34px 2px 34px;
  overflow: hidden;
  background: linear-gradient(140deg, var(--map), var(--paper-warm));
}

.page-about .about-sec__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-sec__media .media__caption {
  margin: 0;
  padding: 10px 14px 12px;
  background: var(--paper-warm);
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .about-sec__media--inset {
  margin-top: clamp(18px, 3vw, 28px);
  border-radius: 2px 26px 2px 26px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 28px);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__card {
  padding: clamp(14px, 2vw, 20px);
  background: var(--paper-warm);
  border-left: 3px solid var(--slate-soft);
  border-radius: 2px 18px 2px 18px;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  border-left-color: var(--orange);
  background: #f4ecdd;
  transform: translateY(-3px);
}

.page-about .about-team__role {
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--orange);
}

.page-about .about-team__desc {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 工序 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding: 0;
  max-width: var(--measure);
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(12px, 2vw, 22px);
  padding: clamp(14px, 2vw, 20px) 0;
  border-top: var(--about-rule);
}

.page-about .about-steps__item:first-child {
  border-top: 2px solid var(--orange);
}

.page-about .about-steps__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
  padding-top: 2px;
}

.page-about .about-steps__title {
  margin: 0 0 4px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(16px, 1.4vw, 18px);
}

.page-about .about-steps__desc {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  list-style: none;
  margin: clamp(14px, 2vw, 22px) 0 clamp(16px, 2vw, 24px);
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: var(--measure);
}

.page-about .about-scenes__item {
  position: relative;
  padding: 10px 14px 10px 32px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
  background: var(--paper-warm);
  border-radius: 2px 14px 2px 14px;
}

.page-about .about-scenes__item::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 1.15em;
  width: 7px;
  height: 7px;
  background: var(--orange);
  border-radius: 1px;
}

/* ---------- 文字链接行 ---------- */
.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-about .about-links__item {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-about .about-links__item:hover {
  background: var(--orange-soft);
}

/* ---------- 统计条 ---------- */
.page-about .about-stats {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(34px, 5vw, 68px) 0;
  position: relative;
}

.page-about .about-stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(64px, 12vw, 180px);
  height: 4px;
  background: var(--orange);
}

.page-about .about-stats__eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--sign);
}

.page-about .about-stats__title {
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 28px);
}

.page-about .about-stats__item {
  padding-left: 12px;
  border-left: 1px solid rgba(247, 243, 234, 0.22);
}

.page-about .about-stats__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-stats__item:first-child .about-stats__value {
  color: var(--sign);
}

.page-about .about-stats__label {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(247, 243, 234, 0.72);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  background: var(--paper-warm);
  border-top: 1px solid rgba(20, 17, 15, 0.1);
  padding: clamp(30px, 5vw, 60px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-hero__mark {
    display: block;
    position: absolute;
    right: calc(var(--gutter) * 0.15);
    top: clamp(70px, 12vh, 130px);
    writing-mode: vertical-rl;
    font-family: var(--font-serif);
    font-size: 11.5px;
    letter-spacing: 0.4em;
    color: var(--slate);
    opacity: 0.75;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: minmax(170px, 214px) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: clamp(84px, 14vh, 132px);
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    margin-left: 3px;
    padding: 0;
    border-left: 1px solid rgba(20, 17, 15, 0.18);
  }

  .page-about .about-rail__link {
    position: relative;
    min-width: 0;
    padding: 11px 0 11px 18px;
    background: none;
    border-radius: 0;
    white-space: normal;
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -4.5px;
    top: 50%;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    border-radius: 50%;
    background: var(--slate-soft);
    transition: background 0.25s ease, box-shadow 0.25s ease;
  }

  .page-about .about-rail__link:hover::before {
    background: var(--orange);
  }

  .page-about .about-rail__link[aria-current="true"]::before {
    background: var(--orange);
    box-shadow: 0 0 0 4px rgba(232, 93, 42, 0.16);
  }

  .page-about .about-rail__link[aria-current="true"] .about-rail__label {
    color: var(--orange);
  }

  .page-about .about-rail__link[aria-current="true"] {
    background: none;
  }
}

@media (min-width: 1080px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-rail__link,
  .page-about .about-rail__link::before {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-team__card:focus-within {
    transform: none;
  }
}