.page-about {
  --about-max: 1320px;
  --about-ink-soft: #33453a;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about * {
  box-sizing: border-box;
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.25;
  margin: 0;
}

.page-about p {
  margin: 0;
}

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

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

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: 22px var(--gutter) 0;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .about-crumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-crumbs li + li::before {
  content: "/";
  color: var(--line);
}

.page-about .about-crumbs a {
  color: var(--moss);
}

.page-about .about-crumbs a:hover {
  color: var(--green);
}

.page-about .about-crumbs [aria-current="page"] {
  color: var(--bronze);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 40px) var(--gutter) clamp(34px, 6vw, 68px);
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-hero__rail {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(165deg, var(--deep), var(--green));
  box-shadow: var(--shadow);
}

.page-about .about-hero__rail img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .about-hero__railcap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 14px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--leaf);
  background: linear-gradient(to top, rgba(16, 42, 30, 0.95), rgba(16, 42, 30, 0));
}

.page-about h1 {
  font-weight: 400;
  font-size: clamp(1.9rem, 5.4vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--deep);
  margin: 12px 0 0.55em;
}

.page-about .about-lead {
  font-size: clamp(1rem, 0.4vw + 0.92rem, 1.14rem);
  line-height: 1.9;
  color: var(--about-ink-soft);
  max-width: 44em;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-about .about-facts > div {
  background: var(--mist);
  padding: 14px 16px;
}

.page-about .about-facts dt {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--moss);
  margin-bottom: 6px;
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 1.6vw, 1.28rem);
  color: var(--deep);
  line-height: 1.35;
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 74px) var(--gutter);
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section__head {
  max-width: 52em;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-index {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--moss);
}

.page-about .about-index span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 20px;
  padding: 0 6px;
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--deep);
  background: var(--gold);
  border-radius: 2px;
}

.page-about h2 {
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  color: var(--deep);
  margin: 0 0 0.55em;
}

.page-about .about-section__lead {
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 业务主线 ---------- */
.page-about .about-lanes {
  display: grid;
  gap: 14px;
}

.page-about .about-lane {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 3px;
  padding: 20px 22px;
}

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

.page-about .about-lane:nth-child(3) {
  border-left-color: var(--moss);
}

.page-about .about-lane:nth-child(4) {
  border-left-color: var(--clay);
}

.page-about .about-lane__num {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bronze);
  margin-bottom: 8px;
}

.page-about .about-lane h3 {
  font-size: 1.05rem;
  color: var(--deep);
  margin-bottom: 8px;
}

.page-about .about-lane p:last-child {
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 深色带 ---------- */
.page-about .about-band {
  background: var(--deep);
  color: var(--mist);
}

.page-about .about-band__inner {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(38px, 6vw, 76px) var(--gutter);
}

.page-about .about-band h2 {
  color: var(--paper);
}

.page-about .about-band .about-index {
  color: var(--leaf);
}

.page-about .about-band .about-index span {
  background: var(--gold);
  color: var(--deep);
}

.page-about .about-band .about-section__lead {
  color: rgba(207, 227, 196, 0.82);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .about-figure img {
  width: 100%;
  border-radius: 4px;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 14 / 8;
}

.page-about .about-figure--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .about-band .about-figure figcaption {
  color: rgba(207, 227, 196, 0.6);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  max-width: 56em;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(216, 166, 58, 0.65), rgba(207, 227, 196, 0.16));
}

.page-about .about-tl > li {
  position: relative;
  padding-left: 32px;
}

.page-about .about-tl > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(216, 166, 58, 0.18);
}

.page-about .about-tl__item > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__item > summary::after {
  content: "+";
  margin-left: auto;
  color: var(--gold);
  font-size: 1.05rem;
  line-height: 1;
}

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

.page-about .about-tl__year {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
  border: 1px solid rgba(216, 166, 58, 0.45);
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
}

.page-about .about-tl__item h3 {
  flex: 1 1 14em;
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .about-tl__body {
  padding: 0 0 18px;
  font-size: 0.93rem;
  line-height: 1.85;
  color: rgba(207, 227, 196, 0.82);
}

.page-about .about-tl__body a {
  color: var(--gold);
  border-bottom: 1px solid rgba(216, 166, 58, 0.45);
}

.page-about .about-tl__body a:hover {
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-team .about-figure {
  margin: 0;
}

.page-about .about-bars {
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
}

.page-about .about-bar {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-bar__sum {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-bar__label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--deep);
}

.page-about .about-bar__track {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: var(--dew);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .about-bar__fill--a {
  width: 35%;
  background: var(--green);
}

.page-about .about-bar__fill--b {
  width: 24%;
  background: var(--moss);
}

.page-about .about-bar__fill--c {
  width: 20%;
  background: var(--gold);
}

.page-about .about-bar__fill--d {
  width: 15%;
  background: var(--clay);
}

.page-about .about-bar__num {
  min-width: 3.6em;
  text-align: right;
  font-family: var(--font-head);
  font-size: 0.95rem;
  color: var(--bronze);
}

.page-about .about-bar__body {
  padding: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-cadence li {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cadence__when {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--bronze);
}

.page-about .about-cadence h3 {
  font-size: 1rem;
  color: var(--deep);
  margin-bottom: 6px;
}

.page-about .about-cadence div p {
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 地区 ---------- */
.page-about .about-regions {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-about .about-regions li {
  background: var(--dew);
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  padding: 14px 16px;
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--deep);
  text-align: center;
  letter-spacing: 0.06em;
}

.page-about .about-regions li:nth-child(7) {
  background: var(--leaf);
}

.page-about .about-regions__note {
  margin-top: clamp(18px, 3vw, 26px);
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 48em;
}

.page-about .about-regions__note a {
  border-bottom: 1px solid rgba(47, 125, 78, 0.35);
  margin-left: 6px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
}

.page-about .about-eco__ring {
  width: min(210px, 62vw);
  aspect-ratio: 1;
  border-radius: 50%;
  justify-self: center;
  position: relative;
  background: conic-gradient(
    var(--green) 0 34%,
    var(--moss) 34% 61%,
    var(--gold) 61% 82%,
    var(--clay) 82% 100%
  );
}

.page-about .about-eco__ring::after {
  content: "";
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  background: var(--paper);
}

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

.page-about .about-eco__legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-eco__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-top: 7px;
}

.page-about .about-eco__dot--a {
  background: var(--green);
}

.page-about .about-eco__dot--b {
  background: var(--moss);
}

.page-about .about-eco__dot--c {
  background: var(--gold);
}

.page-about .about-eco__dot--d {
  background: var(--clay);
}

.page-about .about-eco__legend b {
  display: block;
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--deep);
  margin-bottom: 5px;
}

.page-about .about-eco__legend p {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-honors {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
}

.page-about .about-honors li {
  border: 1px solid var(--line);
  background: var(--dew);
  color: var(--deep);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  padding: 8px 14px;
  border-radius: 999px;
}

.page-about .about-honors li:last-child {
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-principles li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 22px 24px;
  background: var(--deep);
}

.page-about .about-principles .num {
  font-family: var(--font-head);
  font-size: 1.45rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-principles h3 {
  font-size: 1.02rem;
  color: var(--paper);
  margin-bottom: 6px;
}

.page-about .about-principles p {
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(207, 227, 196, 0.8);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 70px) var(--gutter) 0;
}

.page-about .about-next__box {
  border-top: 1px solid var(--line);
  padding-top: clamp(24px, 4vw, 36px);
}

.page-about .about-next__box p {
  margin-top: 12px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 48em;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-top: 20px;
}

.page-about .about-next__links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  font-size: 0.9rem;
  color: var(--deep);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-next__links a::after {
  content: "→";
  color: var(--gold);
}

.page-about .about-next__links a:hover {
  border-color: var(--green);
  background: var(--dew);
  color: var(--green);
}

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

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

@media (min-width: 760px) {
  .page-about .about-lanes {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-lane--a {
    grid-column: span 3;
  }

  .page-about .about-lane--b {
    grid-column: span 3;
  }

  .page-about .about-lane--c {
    grid-column: span 2;
  }

  .page-about .about-lane--d {
    grid-column: span 4;
  }

  .page-about .about-cadence li {
    grid-template-columns: 9em minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }

  .page-about .about-eco {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .page-about .about-principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-hero__rail img {
    aspect-ratio: 3 / 4;
  }

  .page-about .about-team {
    grid-template-columns: 300px minmax(0, 1fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__links a {
    transition: none;
  }
}