.page-about {
  --about-shadow: 14px 14px 0 rgba(201,168,106,.14);
  --about-ink-soft: rgba(26,17,16,.62);
  --about-rule: rgba(26,17,16,.14);
  background: var(--ink);
  color: var(--paper);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 56px;
  background:
    radial-gradient(120% 80% at 88% 0%, rgba(53,224,208,.13), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(226,61,40,.11), transparent 58%),
    var(--ink);
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(201,168,106,.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201,168,106,.14) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 95% at 72% 8%, #000 18%, transparent 78%);
  mask-image: radial-gradient(120% 95% at 72% 8%, #000 18%, transparent 78%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 34px;
}

.page-about .about-hero__copy {
  background: var(--paper);
  color: var(--ink);
  padding: 26px 20px 24px;
  border-left: 4px solid var(--red);
  box-shadow: var(--about-shadow);
}

.page-about .about-crumbs {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--about-ink-soft);
  margin-bottom: 16px;
}

.page-about .about-crumbs a {
  color: var(--about-ink-soft);
  text-decoration: none;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--red);
}

.page-about .about-hero__eyebrow {
  color: var(--red);
  letter-spacing: .18em;
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 8.4vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(26,17,16,.82);
  max-width: 48ch;
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(26,17,16,.16);
}

.page-about .about-hero__meta-item dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--about-ink-soft);
}

.page-about .about-hero__meta-item dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  color: var(--red);
}

.page-about .about-hero__cta {
  margin-top: 22px;
  display: inline-block;
}

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

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.page-about .about-hero__visual figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .05em;
  color: var(--smoke);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 64px) 0 80px;
  }
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: end;
  }
  .page-about .about-hero__copy {
    padding: 40px 38px 34px;
    box-shadow: 18px 18px 0 rgba(201,168,106,.16);
  }
  .page-about .about-hero__visual {
    padding-bottom: 8px;
  }
}

/* ---------- Layout with chapter index ---------- */
.page-about .about-layout {
  display: grid;
  gap: 34px;
  padding-bottom: 72px;
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
  }
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--smoke);
}

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

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  color: var(--paper-72);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-index__no {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--gold);
  color: var(--paper);
}

@media (min-width: 1000px) {
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h-scrolled) + 26px);
    align-self: start;
  }
  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding-bottom: 0;
  }
  .page-about .about-index__list a {
    border: 0;
    border-left: 2px solid var(--line-soft);
    padding: 8px 0 8px 14px;
    white-space: normal;
    background: none;
  }
  .page-about .about-index__list a[aria-current="true"] {
    border-left-color: var(--cyan);
    color: var(--paper);
  }
  .page-about .about-index__list a[aria-current="true"] .about-index__no {
    color: var(--cyan);
  }
}

@media (max-width: 999px) {
  .page-about .about-index__list a[aria-current="true"] {
    background: var(--teal-ink);
    border-color: var(--cyan);
    color: var(--paper);
  }
}

/* ---------- Chapter scaffolding ---------- */
.page-about .about-chapter {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-h-scrolled) + 24px);
}

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

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-chapter__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-chapter__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4.6vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-note {
  font-size: 13px;
  line-height: 1.78;
  color: var(--smoke);
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}

@media (min-width: 820px) {
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 180px) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 22px 20px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}

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

.page-about .about-timeline__item:last-child::before {
  background: var(--red);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper-72);
}

@media (min-width: 1080px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .page-about .about-timeline__item {
    padding: 22px 16px 0 0;
    border-right: 1px solid var(--line-soft);
  }
  .page-about .about-timeline__item:last-child {
    border-right: 0;
    padding-right: 0;
  }
  .page-about .about-timeline__item::before {
    left: 0;
    top: -4px;
  }
  .page-about .about-timeline__year {
    font-size: 15px;
  }
  .page-about .about-timeline__text {
    font-size: 12.5px;
    line-height: 1.62;
  }
}

/* ---------- Figures ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .05em;
  color: var(--smoke);
}

/* ---------- Four service lines ---------- */
.page-about .about-services {
  display: grid;
  border-top: 1px solid var(--line);
}

.page-about .about-service {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-service__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 9px;
  border: 1px solid rgba(53,224,208,.42);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-service h3 {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.34;
  color: var(--paper);
}

.page-about .about-service p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--paper-72);
}

.page-about .about-service ul {
  margin: 0 0 12px;
  padding-left: 17px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--paper-56);
}

.page-about .about-service li {
  margin-bottom: 5px;
}

.page-about .about-service .link-arrow {
  font-size: 13.5px;
}

@media (min-width: 760px) {
  .page-about .about-services {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .page-about .about-service {
    padding: 24px 26px;
  }
  .page-about .about-service:nth-child(odd) {
    padding-left: 0;
    border-right: 1px solid var(--line-soft);
  }
  .page-about .about-service:nth-child(even) {
    padding-right: 0;
  }
}

/* ---------- Comparison table ---------- */
.page-about .about-compare {
  background: var(--paper);
  color: var(--ink);
  padding: 22px 18px;
  border-top: 3px solid var(--red);
}

.page-about .about-table-wrap {
  overflow-x: auto;
}

.page-about .about-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.66;
}

.page-about .about-table caption {
  padding-bottom: 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--about-ink-soft);
}

.page-about .about-table thead th {
  padding: 0 12px 10px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--about-ink-soft);
  border-bottom: 1px solid rgba(26,17,16,.42);
}

.page-about .about-table tbody th,
.page-about .about-table tbody td {
  padding: 13px 12px 13px 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-table tbody th {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--ink);
}

.page-about .about-table tbody td {
  color: rgba(26,17,16,.78);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
  padding-bottom: 4px;
}

@media (min-width: 760px) {
  .page-about .about-compare {
    padding: 30px 28px 24px;
  }
}

.page-about .about-afterword {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--smoke);
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

/* ---------- Stats & quality ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stats li {
  background: var(--ink);
  padding: 16px 14px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 9px;
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--smoke);
}

@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
}

.page-about .about-quality {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-quality__block {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-quality__block h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .about-quality__block p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--paper-72);
}

@media (min-width: 860px) {
  .page-about .about-quality {
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .page-about .about-quality__block {
    padding: 20px 22px 20px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }
  .page-about .about-quality__block:last-child {
    padding-right: 0;
    border-right: 0;
  }
}

/* ---------- Sichuan base ---------- */
.page-about .about-prose {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--paper-72);
  max-width: 62ch;
}

.page-about .about-base {
  margin-top: 22px;
  padding: 22px 18px;
  background: var(--teal-ink);
  border: 1px solid rgba(53,224,208,.26);
}

.page-about .about-base__list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-base__row {
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(53,224,208,.16);
}

.page-about .about-base__row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: rgba(53,224,208,.72);
}

.page-about .about-base__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-base__row dd.num {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.page-about .about-base__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.76;
  color: var(--paper-72);
}

.page-about .about-base__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

@media (min-width: 640px) {
  .page-about .about-base {
    padding: 26px 24px;
  }
  .page-about .about-base__row {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}
<<<END>>>