.page-about {
  --about-tint: rgba(15, 46, 38, 0.92);
  --about-tint-soft: rgba(15, 46, 38, 0.62);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .section-title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 5.2vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--mist);
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px) 0 clamp(36px, 6vw, 76px);
  background:
    radial-gradient(760px 380px at 84% 4%, rgba(242, 163, 58, 0.22), transparent 68%),
    radial-gradient(520px 340px at 6% 96%, rgba(15, 46, 38, 0.9), transparent 72%),
    var(--ink);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__text h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(31px, 7.4vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.9;
  color: rgba(251, 247, 239, 0.8);
}

.page-about .about-hero__marks {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 13px;
  color: rgba(251, 247, 239, 0.72);
}

.page-about .about-hero__marks li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__marks .mono {
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--line-mist);
  background:
    radial-gradient(300px 200px at 50% 30%, rgba(242, 163, 58, 0.24), transparent 70%),
    var(--pine);
}

.page-about .about-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-media--tall img { aspect-ratio: 3 / 4; }
.page-about .about-media--4x3 img { aspect-ratio: 4 / 3; }
.page-about .about-media--3x2 img { aspect-ratio: 3 / 2; }

.page-about .about-media__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  max-width: calc(100% - 24px);
  padding: 7px 13px;
  border-radius: var(--r-pill);
  background: rgba(20, 18, 16, 0.78);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

/* ---------- SPLIT LAYOUT ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(36px, 5vw, 78px);
}

.page-about .about-rail {
  background: linear-gradient(170deg, var(--about-tint), var(--about-tint-soft));
  border: 1px solid var(--line-amber);
  border-radius: var(--r-md);
  padding: 22px 20px 20px;
}

.page-about .about-rail__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-amber-strong), rgba(242, 163, 58, 0.08));
}

.page-about .about-rail__item {
  position: relative;
  margin-bottom: 14px;
}

.page-about .about-rail__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 163, 58, 0.14);
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  color: rgba(251, 247, 239, 0.86);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  padding: 2px 0;
  transition: color 0.25s var(--ease-lamp);
}

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

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vermilion);
  letter-spacing: 0.06em;
}

.page-about .about-rail__note {
  margin: 20px 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line-mist);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-rail__btn {
  width: 100%;
  justify-content: center;
}

/* ---------- BODY SECTIONS ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(42px, 6vw, 84px);
  padding-top: clamp(34px, 5vw, 64px);
  border-top: 1px solid var(--line-mist);
}

.page-about .about-sec__lead {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: clamp(15px, 2.1vw, 16.5px);
  line-height: 1.9;
  color: rgba(251, 247, 239, 0.84);
}

.page-about .about-sec p {
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(251, 247, 239, 0.74);
}

.page-about .about-quote {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3vw, 32px);
  background: var(--paper);
  color: var(--ink);
  border-left: 6px solid var(--amber);
  border-radius: var(--r-sm);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 23px);
  line-height: 1.62;
  letter-spacing: -0.005em;
}

.page-about .about-creed__big {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 4.8vw, 36px);
  line-height: 1.42;
  color: var(--gold);
  max-width: 26ch;
}

.page-about .about-creed__list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-creed__item {
  background: linear-gradient(160deg, var(--about-tint), rgba(15, 46, 38, 0.55));
  border: 1px solid var(--line-mist);
  border-left: 4px solid var(--amber);
  border-radius: var(--r-sm);
  padding: 18px 18px 16px;
}

.page-about .about-creed__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .about-creed__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(251, 247, 239, 0.72);
}

/* ---------- TEAM ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: clamp(24px, 3vw, 34px);
}

.page-about .about-metric {
  background: linear-gradient(165deg, rgba(15, 46, 38, 0.95), rgba(15, 46, 38, 0.6));
  border: 1px solid var(--line-amber);
  border-radius: var(--r-sm);
  padding: 16px 15px 12px;
  transition: border-color 0.25s var(--ease-lamp), box-shadow 0.25s var(--ease-lamp);
}

.page-about .about-metric:hover,
.page-about .about-metric:focus-within {
  border-color: var(--line-amber-strong);
  box-shadow: 0 0 0 1px rgba(242, 163, 58, 0.18), 0 14px 30px -18px rgba(0, 0, 0, 0.9);
}

.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.01em;
}

.page-about .about-metric__k {
  margin: 8px 0 10px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(251, 247, 239, 0.82);
}

.page-about .about-metric__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--sage);
  padding: 6px 0;
  border-top: 1px dashed rgba(111, 129, 121, 0.45);
}

.page-about .about-metric__more summary::-webkit-details-marker { display: none; }

.page-about .about-metric__more summary::after {
  content: " +";
  color: var(--vermilion);
}

.page-about .about-metric__more[open] summary::after {
  content: " −";
}

.page-about .about-metric__more summary:hover,
.page-about .about-metric__more summary:focus-visible {
  color: var(--gold);
}

.page-about .about-metric__more p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.7);
}

/* ---------- JOURNEY ---------- */
.page-about .about-stage {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0 0 0 20px;
  position: relative;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-amber-strong), rgba(242, 163, 58, 0.1));
}

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

.page-about .about-stage__item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 163, 58, 0.12);
}

.page-about .about-stage__tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: rgba(200, 64, 46, 0.16);
  border: 1px solid rgba(200, 64, 46, 0.4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-stage__item h3 {
  margin: 9px 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-stage__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(251, 247, 239, 0.72);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--line-mist);
  border: 1px solid var(--line-mist);
  border-radius: var(--r-sm);
  overflow: hidden;
}

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

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.6vw, 30px);
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-figures__k {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--sage);
  letter-spacing: 0.04em;
}

/* ---------- TRUST ---------- */
.page-about .about-cred {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-cred__item {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--r-sm);
  border-left: 5px solid var(--amber);
  padding: 14px 16px;
}

.page-about .about-cred__item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .about-cred__item summary::-webkit-details-marker { display: none; }

.page-about .about-cred__seal {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 62px;
  padding: 5px 10px;
  border-radius: var(--r-pill);
  background: var(--pine);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-about .about-cred__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-cred__item summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--vermilion);
  letter-spacing: 0.08em;
}

.page-about .about-cred__item[open] summary::after {
  content: "收起";
}

.page-about .about-cred__item summary:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 3px;
}

.page-about .about-cred__item p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(20, 18, 16, 0.78);
  max-width: 62ch;
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 76px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--r-lg);
  background:
    radial-gradient(420px 240px at 88% 0%, rgba(255, 210, 122, 0.55), transparent 70%),
    linear-gradient(150deg, var(--amber), #e08f27);
  color: var(--ink);
}

.page-about .about-cta__eyebrow {
  color: rgba(20, 18, 16, 0.6);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 4.4vw, 32px);
  line-height: 1.32;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(20, 18, 16, 0.82);
}

.page-about .about-cta__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta .btn--ghost {
  border-color: rgba(20, 18, 16, 0.42);
  color: var(--ink);
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible {
  border-color: var(--ink);
}

/* ---------- RESPONSIVE ---------- */
@media (min-width: 620px) {
  .page-about .about-creed__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-media--tall {
    align-self: stretch;
  }

  .page-about .about-media--tall img {
    aspect-ratio: 3 / 4;
    height: 100%;
  }
}

@media (min-width: 1000px) {
  .page-about .about-split {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-stage {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
    padding-left: 22px;
  }

  .page-about .about-stage::before {
    bottom: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-metric,
  .page-about .about-rail__link {
    transition: none;
  }
}
</main>