.page-about {
  --about-pad: clamp(44px, 7vw, 104px);
  --about-rail: 220px;
  --about-read: 34em;
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--mist);
  padding: clamp(26px, 4vw, 44px) 0 clamp(40px, 6vw, 84px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--pink), var(--rose) 58%, var(--gold));
}

.page-about .about-hero .breadcrumbs {
  color: var(--on-dark-soft);
  margin-bottom: clamp(24px, 4vw, 56px);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--on-dark-soft);
  text-decoration: none;
  transition: color 160ms ease;
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--pink);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  font-weight: 400;
  max-width: 17ch;
}

.page-about .about-hero__lede {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.9;
  color: var(--on-dark);
  max-width: 40ch;
}

.page-about .about-scale {
  display: block;
  width: 100%;
  height: 24px;
  margin-top: clamp(20px, 3vw, 36px);
  color: rgba(198, 161, 91, 0.55);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(36px, 5vw, 80px);
  }
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(30px, 4.5vw, 62px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hair-dark);
}

.page-about .about-figures li {
  padding: 20px 14px 18px 0;
  border-bottom: 1px solid var(--hair-dark);
}

.page-about .fig-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--mist);
}

.page-about .about-figures li:nth-child(3) .fig-num {
  color: var(--pink);
}

.page-about .fig-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-soft);
}

@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-figures li {
    padding: 24px 24px 4px 24px;
    border-bottom: 0;
    border-right: 1px solid var(--hair-dark);
  }

  .page-about .about-figures li:first-child {
    padding-left: 0;
  }

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

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line);
}

.page-about .chapter__inner {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
}

@media (min-width: 900px) {
  .page-about .chapter__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }
}

.page-about .chapter__rail {
  position: relative;
}

@media (min-width: 900px) {
  .page-about .chapter__rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }
}

.page-about .chapter__num {
  position: relative;
  display: block;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(42px, 6vw, 82px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--ink);
}

.page-about .chapter__num::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--pink);
}

.page-about .chapter__body {
  min-width: 0;
}

@media (min-width: 900px) {
  .page-about .chapter__body {
    max-width: 640px;
  }
}

.page-about .chapter__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 400;
}

.page-about .chapter__lede {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.85;
  color: var(--ink);
  max-width: var(--about-read);
}

.page-about .chapter__text {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink);
  max-width: var(--about-read);
}

.page-about .chapter__text a {
  color: var(--rose);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .chapter__text a:hover {
  color: var(--pink);
  border-bottom-color: var(--pink);
}

/* ---------- 产品线清单 ---------- */
.page-about .lines {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 clamp(20px, 3vw, 32px);
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .lines li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: transform 160ms ease;
}

.page-about .lines li:hover {
  transform: translateX(4px);
}

.page-about .lines__no {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--gold);
}

.page-about .lines__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about .lines__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 图像 ---------- */
.page-about .about-media {
  margin: clamp(24px, 4vw, 44px) 0;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--blush);
}

.page-about .about-media--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-media figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--gray);
}

/* ---------- 面料 ---------- */
.page-about .fabrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 clamp(24px, 3vw, 36px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .fabric {
  background: var(--mist);
  padding: 16px 16px 20px;
}

.page-about .fabric__swatch {
  display: block;
  height: 64px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
}

.page-about .fabric__swatch--modal {
  background:
    repeating-linear-gradient(115deg, rgba(250, 247, 244, 0.5) 0 3px, rgba(107, 90, 76, 0.06) 3px 6px),
    linear-gradient(135deg, #FAF7F4, var(--gold-pale) 44%, var(--blush));
}

.page-about .fabric__swatch--lyocell {
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.42) 0 2px, rgba(142, 11, 76, 0.05) 2px 5px),
    linear-gradient(135deg, var(--blush), #FAF7F4 58%, var(--gold));
}

.page-about .fabric__swatch--silk {
  background:
    repeating-linear-gradient(60deg, rgba(255, 255, 255, 0.35) 0 4px, rgba(11, 11, 15, 0.05) 4px 9px),
    linear-gradient(120deg, var(--gold-pale), var(--gold) 52%, var(--rose));
}

.page-about .fabric__swatch--nylon {
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.28) 0 3px, rgba(11, 11, 15, 0.08) 3px 7px),
    linear-gradient(135deg, var(--line), var(--gray));
}

.page-about .fabric__swatch--cotton {
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.45) 0 3px, rgba(110, 110, 120, 0.07) 3px 6px),
    linear-gradient(135deg, #FAF7F4, var(--line) 66%, var(--blush));
}

.page-about .fabric__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
}

.page-about .fabric__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--ink);
  color: var(--mist);
  padding: var(--about-pad) 0;
}

.page-about .tl__heading {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 400;
  max-width: 20ch;
}

.page-about .tl__lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.9;
  color: var(--on-dark);
}

.page-about .tl {
  list-style: none;
  margin: clamp(30px, 4.5vw, 60px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .tl__item {
  position: relative;
  padding: 22px 0 26px 26px;
  border-left: 1px solid var(--hair-dark);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 30px;
  width: 7px;
  height: 7px;
  background: var(--gold);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.page-about .tl__item:hover::before {
  background: var(--pink);
  box-shadow: 0 0 0 5px rgba(224, 25, 124, 0.18);
}

.page-about .tl__stage {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  transition: color 160ms ease;
}

.page-about .tl__item:hover .tl__stage {
  color: var(--pink);
}

.page-about .tl__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .tl__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

@media (min-width: 860px) {
  .page-about .tl {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .tl__item {
    border-left: 0;
    border-top: 1px solid var(--hair-dark);
    padding: 30px 22px 0 0;
  }

  .page-about .tl__item::before {
    left: 0;
    top: -4px;
  }

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

.page-about .tl__link {
  margin: clamp(30px, 4vw, 52px) 0 0;
  font-size: 16px;
  color: var(--on-dark);
}

.page-about .tl__link a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .tl__link a:hover {
  color: var(--pink);
  border-bottom-color: var(--pink);
}

/* ---------- 服务承诺 ---------- */
.page-about .assure {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 760px) {
  .page-about .assure {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    align-items: start;
  }
}

.page-about .assure__main {
  min-width: 0;
}

.page-about .about-panel {
  padding: clamp(20px, 3vw, 30px);
  background: var(--plum);
  color: var(--mist);
  border-top: 2px solid var(--pink);
}

.page-about .about-panel__title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-pale);
}

.page-about .about-panel dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-panel dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--on-dark-soft);
}

.page-about .about-panel dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-panel .is-num {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

/* ---------- 引文 ---------- */
.page-about .about-quote-wrap {
  background: var(--blush);
  padding: var(--about-pad) 0;
}

.page-about .about-quote {
  margin: 0;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  padding: clamp(26px, 4vw, 48px) 0;
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 32px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 26em;
}

.page-about .about-quote footer {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rose);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-next a {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: transform 160ms ease, color 160ms ease;
}

.page-about .about-next a:hover {
  transform: translateX(4px);
  color: var(--pink);
}

.page-about .about-next__label {
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-next__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

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

  .page-about .about-next a {
    padding: 24px 24px 24px 24px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-next a:first-child {
    padding-left: 0;
    border-left: 0;
  }
}