.page-about {
  --about-rule: rgba(184, 163, 106, 0.45);
  --about-rule-soft: rgba(184, 163, 106, 0.24);
  --about-ink-soft: #5C5449;
  background: var(--surface-page);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .section {
  padding: clamp(44px, 7vw, 92px) 0;
}

.page-about .about-head {
  max-width: 720px;
}

.page-about .about-head__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.2vw, 2.7rem);
  line-height: 1.22;
  color: var(--ink);
  margin: 10px 0 0;
  letter-spacing: 0.01em;
}

.page-about .about-head__text {
  margin: 14px 0 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 40em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 16px 0 clamp(44px, 7vw, 84px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -16%;
  width: min(760px, 108%);
  height: 640px;
  background-image:
    linear-gradient(to right, rgba(200, 16, 46, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(200, 16, 46, 0.09) 1px, transparent 1px);
  background-size: 46px 46px;
  transform: rotate(-10deg);
  transform-origin: top right;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(ellipse 68% 62% at 58% 42%, #000 8%, transparent 76%);
  mask-image: radial-gradient(ellipse 68% 62% at 58% 42%, #000 8%, transparent 76%);
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 18px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6.4vw, 4.15rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 10px 0 0;
}

.page-about .about-hero__mark {
  position: relative;
  color: var(--caishen-red);
  white-space: nowrap;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.04em;
  height: 0.14em;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--gold), var(--gold-bright));
  opacity: 0.85;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 33em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3.4vw, 1.5rem);
  font-weight: 700;
  color: var(--caishen-red);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.page-about .about-hero__label {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-12);
  line-height: 1.5;
  color: var(--about-ink-soft);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-rule);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__figure .media-caption {
  margin-top: 10px;
  font-size: var(--fs-12);
  color: var(--about-ink-soft);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(30px, 4vw, 62px);
    align-items: center;
  }

  .page-about .about-hero__figure {
    transform: rotate(-2deg);
  }

  .page-about .about-hero__lede {
    font-size: var(--fs-18);
  }
}

/* ---------- 引语 ---------- */
.page-about .about-quote {
  position: relative;
  padding: clamp(34px, 6vw, 62px) 0;
  background: linear-gradient(118deg, var(--caishen-red-deep) 0%, var(--caishen-red) 62%, #A50E26 100%);
  color: var(--ink-cream);
  overflow: hidden;
}

.page-about .about-quote::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(242, 193, 78, 0.4);
  pointer-events: none;
}

.page-about .about-quote__inner {
  position: relative;
  z-index: 1;
  border-left: 3px solid var(--gold);
  padding-left: clamp(16px, 3vw, 28px);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.6vw, 2.15rem);
  line-height: 1.5;
  max-width: 22em;
}

.page-about .about-quote__by {
  margin: 16px 0 0;
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: rgba(255, 246, 218, 0.78);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--rice);
}

.page-about .timeline {
  position: relative;
  margin-top: clamp(26px, 4vw, 44px);
  padding-left: 22px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 99px;
  background: linear-gradient(to bottom, var(--gold), var(--about-rule-soft));
}

.page-about .milestone {
  position: relative;
  margin-bottom: 16px;
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 26px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--rice);
  border: 3px solid var(--gold);
  box-sizing: border-box;
  z-index: 1;
}

.page-about .milestone__card {
  background: var(--surface-card);
  border: 1px solid var(--about-rule-soft);
  padding: 20px;
}

.page-about .milestone__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--gold);
  line-height: 1;
}

.page-about .milestone__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-24);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .milestone__text {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .milestone .panel {
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
  margin-top: 14px;
}

.page-about .milestone .panel__head {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-rule);
  background: transparent;
  color: var(--caishen-red);
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.22s ease, border-color 0.22s ease, color 0.22s ease;
}

.page-about .milestone .panel__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  line-height: 1;
}

.page-about .milestone .panel__head:hover {
  border-color: var(--gold);
  background: rgba(212, 160, 23, 0.1);
}

.page-about .milestone .panel__head[aria-expanded="true"] {
  background: var(--caishen-red);
  border-color: var(--caishen-red);
  color: var(--ink-cream);
}

.page-about .milestone .panel__head[aria-expanded="true"]::after {
  content: "−";
}

.page-about .milestone .panel__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--about-rule);
}

.page-about .milestone__body p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-collage {
  margin: clamp(26px, 5vw, 52px) 0 0;
}

.page-about .about-collage img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-rule-soft);
}

.page-about .about-collage .media-caption {
  margin-top: 10px;
  font-size: var(--fs-12);
  color: var(--about-ink-soft);
}

@media (min-width: 860px) {
  .page-about .timeline {
    padding-left: 32px;
  }

  .page-about .milestone::before {
    left: -38px;
    top: 30px;
    width: 16px;
    height: 16px;
  }

  .page-about .milestone__card {
    padding: 26px 28px;
  }

  .page-about .milestone__text {
    font-size: var(--fs-16);
    max-width: 42em;
  }
}

/* ---------- 文档写法 ---------- */
.page-about .about-docs {
  background: linear-gradient(180deg, var(--rice) 0%, var(--paper) 100%);
}

.page-about .about-docs__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-docs__link {
  margin-top: 22px;
}

.page-about .about-docs__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: docstep;
  display: grid;
  gap: 12px;
}

.page-about .about-docs__step {
  counter-increment: docstep;
  position: relative;
  padding: 18px 18px 18px 58px;
  background: var(--surface-card);
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 32px -30px rgba(20, 20, 20, 0.65);
}

.page-about .about-docs__step::before {
  content: counter(docstep, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.2;
}

.page-about .about-docs__step h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-docs__step p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .page-about .about-docs__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-docs__intro {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  position: relative;
  background: var(--surface-deep);
  color: var(--text-on-dark);
  overflow: hidden;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(to right, rgba(212, 160, 23, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(212, 160, 23, 0.08) 1px, transparent 1px);
  background-size: 52px 52px;
  transform: rotate(-8deg);
  pointer-events: none;
}

.page-about .about-team > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-team .eyebrow {
  color: var(--gold-bright);
}

.page-about .about-team .about-head__title {
  color: var(--ink-cream);
}

.page-about .about-team .about-head__text {
  color: var(--text-on-dark);
}

.page-about .about-team__photo {
  display: block;
  width: 100%;
  height: auto;
  margin: clamp(24px, 4vw, 40px) 0 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(212, 160, 23, 0.32);
}

.page-about .about-team__cards {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__card {
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(250, 245, 233, 0.06);
  border: 1px solid rgba(212, 160, 23, 0.26);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5.4vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .about-team__title {
  margin: 12px 0 0;
  font-size: var(--fs-18);
  color: var(--ink-cream);
  letter-spacing: 0.02em;
}

.page-about .about-team__text {
  margin: 8px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(250, 245, 233, 0.72);
}

@media (min-width: 760px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 三原则 ---------- */
.page-about .about-principles {
  background: var(--rice);
}

.page-about .about-principles__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 42px);
}

.page-about .principle {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--surface-card);
  border: 1px solid var(--about-rule-soft);
  border-top: 3px solid var(--caishen-red);
  box-shadow: 0 18px 40px -36px rgba(20, 20, 20, 0.75);
}

.page-about .principle:nth-child(2) {
  border-top-color: var(--gold);
}

.page-about .principle:nth-child(3) {
  border-top-color: var(--celadon);
}

.page-about .principle__index {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--line);
}

.page-about .principle__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-24);
  color: var(--ink);
}

.page-about .principle__text {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-soft);
}

@media (min-width: 880px) {
  .page-about .about-principles__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .principle:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .principle:nth-child(3) {
    margin-top: 60px;
  }
}

/* ---------- 合作 ---------- */
.page-about .about-collab {
  background: var(--surface-panel);
}

.page-about .about-collab__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-collab__intro .btn {
  margin-top: 22px;
}

.page-about .about-collab__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-collab__item {
  padding: 18px 20px;
  background: var(--surface-card);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: 0 14px 30px -30px rgba(20, 20, 20, 0.6);
}

.page-about .about-collab__item h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-collab__item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .page-about .about-collab__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(32px, 5vw, 60px);
    align-items: start;
  }
}

/* ---------- 下一版 ---------- */
.page-about .about-next {
  background: var(--rice);
}

.page-about .about-next__card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 48px);
  border-radius: var(--radius-lg);
  background: linear-gradient(126deg, var(--caishen-red-deep) 0%, var(--caishen-red) 58%, #A50E26 100%);
  color: var(--ink-cream);
  box-shadow: var(--shadow-gold);
}

.page-about .about-next__card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(242, 193, 78, 0.42);
  pointer-events: none;
}

.page-about .about-next__eyebrow {
  color: var(--gold-bright);
}

.page-about .about-next__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.24;
}

.page-about .about-next__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-next__list h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  color: var(--ink-cream);
  letter-spacing: 0.03em;
}

.page-about .about-next__list p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(255, 246, 218, 0.82);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-next__card .btn--ghost {
  border-color: rgba(255, 246, 218, 0.55);
  color: var(--ink-cream);
}

.page-about .about-next__card .btn--ghost:hover {
  border-color: var(--gold-bright);
  background: rgba(255, 246, 218, 0.1);
}

@media (min-width: 820px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}