.page-about {
  --about-line: rgba(217, 164, 65, .45);
  --about-hair: rgba(15, 42, 34, .12);
  --about-hair-dark: rgba(245, 239, 226, .16);
  background: var(--paper);
  color: var(--black);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: radial-gradient(125% 95% at 82% 10%, #17493A 0%, var(--ink) 54%, var(--ink-deep) 100%);
  color: var(--paper);
  padding: clamp(96px, 15vw, 152px) 0 clamp(54px, 7vw, 88px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(245, 239, 226, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 239, 226, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(92% 72% at 50% 38%, #000 18%, transparent 78%);
  mask-image: radial-gradient(92% 72% at 50% 38%, #000 18%, transparent 78%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(34px, 5vw, 56px);
  align-items: center;
}

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

.page-about .about-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(245, 239, 226, .55);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(245, 239, 226, .82);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 239, 226, .26);
  padding-bottom: 1px;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(217, 164, 65, .45);
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .14em;
  background: rgba(217, 164, 65, .1);
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.24;
  letter-spacing: -.012em;
  color: #FFFDF7;
  margin: 0 0 22px;
  max-width: 15em;
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--gold);
}

.page-about .about-hero__lede {
  margin: 0 0 34px;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 239, 226, .8);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 0 0 32px;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .about-hero__stats > div {
  min-width: 0;
}

.page-about .about-hero__stats dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .09em;
  color: rgba(245, 239, 226, .54);
}

.page-about .about-hero__stats dd {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 27px);
  color: #FFFDF7;
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats dd small {
  margin-left: 4px;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(245, 239, 226, .6);
}

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

.page-about .about-hero .btn--ghost {
  color: var(--paper);
  border-color: rgba(245, 239, 226, .34);
  background: transparent;
}

.page-about .about-hero .btn--ghost:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .about-hero__art {
  justify-self: center;
  width: min(100%, 400px);
}

.page-about .about-hero__art svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 区块标题 ---------- */
.page-about .about-head {
  max-width: 60ch;
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-about .about-head .eyebrow {
  display: inline-block;
  margin: 0;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(15, 42, 34, .07);
  color: var(--grey);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-about .about-head h2 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(24px, 3.7vw, 38px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 14px 0 14px;
}

.page-about .about-head__sub {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--grey);
}

.page-about .about-head--dark .eyebrow {
  background: rgba(217, 164, 65, .14);
  color: var(--gold);
}

.page-about .about-head--dark h2 {
  color: #FFFDF7;
}

.page-about .about-head--dark .about-head__sub {
  color: rgba(245, 239, 226, .72);
}

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

.page-about .about-figure {
  margin: 0 0 clamp(30px, 4.4vw, 52px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 30px);
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 46px;
  bottom: -34px;
  width: 2px;
  z-index: 0;
  background: linear-gradient(180deg, var(--about-line), rgba(217, 164, 65, .06));
}

.page-about .about-track__item:last-child::before {
  display: none;
}

.page-about .about-track__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: var(--paper-raise);
  border: 1.5px solid var(--about-line);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-track__item > details {
  min-width: 0;
}

.page-about .about-stage {
  background: var(--paper-raise);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-stage[open] {
  border-color: rgba(217, 164, 65, .62);
  box-shadow: var(--shadow-card);
}

@media (hover: hover) {
  .page-about .about-stage:hover {
    border-color: rgba(217, 164, 65, .62);
    box-shadow: var(--shadow-card);
  }
}

.page-about .about-stage__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-stage__label {
  flex: 0 0 auto;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(200, 16, 46, .24);
  background: rgba(200, 16, 46, .08);
  color: var(--red);
  font-size: 12px;
  letter-spacing: .1em;
  line-height: 1.5;
}

.page-about .about-stage__title {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-stage__trigger::after {
  content: "＋";
  flex: 0 0 auto;
  margin-left: auto;
  font-size: 16px;
  line-height: 1;
  color: var(--red);
}

.page-about .about-stage[open] .about-stage__trigger::after {
  content: "－";
}

.page-about .about-stage__panel {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--about-hair);
  font-size: 15px;
  line-height: 1.85;
  color: var(--black);
}

.page-about .about-stage__panel p {
  margin: 0;
  max-width: 62ch;
}

.page-about .about-stage__panel p + p {
  margin-top: 10px;
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-stage[open] .about-stage__panel {
    animation: aboutPanelIn .3s var(--ease) both;
  }
}

@keyframes aboutPanelIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 1px solid rgba(217, 164, 65, .2);
  pointer-events: none;
}

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

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 3.8vw, 46px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(245, 239, 226, .14);
  background: var(--ink-soft);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

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

.page-about .about-role {
  position: relative;
  padding: 20px 22px 20px 26px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 239, 226, .13);
  background: rgba(245, 239, 226, .05);
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--gold);
}

.page-about .about-role:nth-child(2)::before {
  background: var(--red);
}

.page-about .about-role:nth-child(3)::before {
  background: var(--neon);
}

@media (hover: hover) {
  .page-about .about-role:hover {
    transform: translateY(-2px);
    border-color: rgba(217, 164, 65, .55);
    background: rgba(245, 239, 226, .08);
  }
}

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: #FFFDF7;
}

.page-about .about-role p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 239, 226, .74);
}

.page-about .about-role__meta {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--gold);
}

/* ---------- 规则流程 ---------- */
.page-about .about-flow {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 28px;
  position: relative;
}

.page-about .about-flow__step {
  position: relative;
  min-width: 0;
}

.page-about .about-flow__idx {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  border: 3px solid var(--paper-warm);
  color: var(--gold);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 2;
}

.page-about .about-flow__step h3 {
  margin: 16px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 本地化维护 ---------- */
.page-about .about-region {
  background: var(--paper-warm);
}

.page-about .about-region__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-region__copy h2 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 14px 0 18px;
}

.page-about .about-region__copy .eyebrow {
  display: inline-block;
  margin: 0;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(15, 42, 34, .07);
  color: var(--grey);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-about .about-region__lede {
  margin: 0 0 14px;
  max-width: 44ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--black);
}

.page-about .about-region__facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--about-hair);
  display: grid;
  gap: 12px;
}

.page-about .about-region__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .about-region__fact-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 18px;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-region__figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 42, 34, .14);
  background: var(--ink);
}

.page-about .about-region__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 对外合作 ---------- */
.page-about .about-partners {
  background: var(--paper);
}

.page-about .about-partners__list {
  display: grid;
  gap: 16px;
}

.page-about .about-partner {
  padding: 22px 22px 24px;
  border-radius: var(--radius-md);
  background: var(--paper-raise);
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--gold);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

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

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

@media (hover: hover) {
  .page-about .about-partner:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
  }
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--ink);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-promise__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .about-promise__item:last-child {
  border-bottom: 1px solid var(--about-hair-dark);
}

.page-about .about-promise__idx {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 15px;
  color: var(--gold);
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-promise__item h3 {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: #FFFDF7;
}

.page-about .about-promise__item p {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(245, 239, 226, .72);
}

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

.page-about .about-promise .btn--ghost {
  color: var(--paper);
  border-color: rgba(245, 239, 226, .32);
  background: transparent;
}

.page-about .about-promise .btn--ghost:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 420px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 12px;
  }

  .page-about .about-track__item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .about-track__num {
    width: 38px;
    height: 38px;
    font-size: 13px;
  }

  .page-about .about-track__item::before {
    left: 18px;
    top: 40px;
  }

  .page-about .about-stage__trigger {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .about-stage__trigger::after {
    position: absolute;
    right: 0;
    top: 0;
  }

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

  .page-about .about-promise__item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-region__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px 18px;
  }

  .page-about .about-region__facts li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(34px, 4.6vw, 70px);
  }

  .page-about .about-track__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .about-track__num {
    width: 58px;
    height: 58px;
    font-size: 17px;
  }

  .page-about .about-track__item::before {
    left: 28px;
    top: 60px;
    bottom: -30px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-flow__list::before {
    content: "";
    position: absolute;
    top: 25px;
    left: 22px;
    right: 22px;
    height: 1px;
    z-index: 0;
    background: repeating-linear-gradient(90deg, rgba(217, 164, 65, .6) 0 6px, transparent 6px 14px);
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(30px, 4vw, 56px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__art {
    width: 100%;
    max-width: 440px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage__panel {
    animation: none !important;
  }

  .page-about .about-role,
  .page-about .about-partner,
  .page-about .about-stage {
    transition: none;
  }
}