/* ===== 品牌档案 · page-about ===== */

.page-about {
  --about-rail: 7.5rem;
  --about-gap: clamp(1rem, 2.4vw, 1.75rem);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 5.25rem;
  padding-bottom: 0.75rem;
}

@media (min-width: 1024px) {
  .page-about .breadcrumb {
    padding-top: 2.25rem;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 62%;
  opacity: 0.34;
  filter: grayscale(0.5) saturate(0.55) contrast(1.05);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(14, 34, 51, 0.6) 0%, rgba(14, 34, 51, 0.88) 56%, var(--ink-900) 100%),
    radial-gradient(75% 60% at 10% 18%, rgba(200, 150, 62, 0.14), transparent 70%);
}

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

.page-about .about-hero__title {
  margin: 1rem 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 6.2vw, 4.25rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__title span {
  display: block;
  margin-top: 0.35em;
  font-weight: 300;
  font-size: 0.62em;
  letter-spacing: 0.01em;
  color: var(--paper-dim);
}

.page-about .about-hero__panel {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  max-width: 44rem;
  padding: clamp(1.15rem, 3vw, 1.75rem);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--line-amber);
  border-radius: var(--radius);
  background: rgba(23, 50, 74, 0.52);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about .about-hero__lede {
  margin: 0;
  font-size: clamp(0.9375rem, 1.5vw, 1.0625rem);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 800px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.05rem 1.2rem;
  background: rgba(14, 34, 51, 0.84);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber-bright);
}

.page-about .about-fact__label {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero__vnote {
  position: absolute;
  right: 0.75rem;
  bottom: 2.5rem;
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  color: var(--amber);
  opacity: 0.78;
}

@media (max-width: 640px) {
  .page-about .about-hero__vnote {
    display: none;
  }
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding: clamp(3.25rem, 7.5vw, 6rem) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .section__title {
  color: var(--paper);
  max-width: 30ch;
}

.page-about .eyebrow {
  color: var(--amber);
}

.page-about .lede {
  max-width: 46rem;
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.95;
  color: rgba(245, 241, 232, 0.78);
}

/* ---------- 01 服务对象 ---------- */
.page-about .about-serve {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

@media (min-width: 880px) {
  .page-about .about-serve {
    grid-template-columns: 58fr 42fr;
    align-items: start;
  }
}

.page-about .about-serve__card {
  padding: clamp(1.35rem, 3.4vw, 2.35rem);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--ink-800), var(--ink-900));
}

.page-about .about-serve__card:last-child {
  border-top-color: var(--celadon);
  background: linear-gradient(158deg, rgba(79, 169, 140, 0.09), var(--ink-900) 62%);
}

.page-about .about-serve__kicker {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .about-serve__card:last-child .about-serve__kicker {
  color: var(--celadon);
}

.page-about .about-serve__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.1875rem, 2.8vw, 1.625rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-serve__card > p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.95;
  color: rgba(245, 241, 232, 0.8);
}

.page-about .about-serve__list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-serve__list li {
  position: relative;
  padding: 0.72rem 0 0.72rem 1.35rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--paper-dim);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-serve__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.32rem;
  width: 0.5rem;
  height: 1px;
  background: var(--amber);
}

.page-about .about-serve__card:last-child .about-serve__list li::before {
  background: var(--celadon);
}

/* ---------- 02 发展节点 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.25rem);
  }
}

.page-about .about-years {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-years__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  color: var(--muted);
}

@media (max-width: 899px) {
  .page-about .about-years__label {
    display: none;
  }
}

.page-about .about-years__list {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.page-about .about-years__link {
  display: block;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: color 0.24s ease, border-color 0.24s ease, background-color 0.24s ease;
}

.page-about .about-years__link:hover {
  color: var(--amber-bright);
  border-color: var(--line-amber);
}

.page-about .about-years__link[data-current] {
  color: var(--ink-900);
  background: var(--amber);
  border-color: var(--amber);
}

@media (min-width: 900px) {
  .page-about .about-years {
    display: block;
    position: sticky;
    top: calc(var(--topbar-h) + 2rem);
    align-self: start;
    padding: 0 0 0 1rem;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-years__list {
    display: block;
    margin-top: 1.1rem;
  }

  .page-about .about-years__item + .about-years__item {
    margin-top: 0.4rem;
  }

  .page-about .about-years__link {
    padding: 0.45rem 0 0.45rem 0.85rem;
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    background: none;
  }

  .page-about .about-years__link[data-current] {
    color: var(--amber-bright);
    background: none;
    border-left-color: var(--amber-bright);
  }
}

.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

@media (min-width: 760px) {
  .page-about .about-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-node--wide {
    grid-column: span 2;
  }
}

.page-about .about-node {
  position: relative;
  padding: clamp(1.25rem, 3vw, 1.9rem) clamp(1.25rem, 3vw, 1.9rem) clamp(1.5rem, 3.4vw, 2.1rem);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.24s ease, border-color 0.24s ease;
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 2.5rem;
  background: var(--amber);
  transition: width 0.3s ease;
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-amber);
}

.page-about .about-node:hover::after,
.page-about .about-node:focus-within::after {
  width: 100%;
}

.page-about .about-node__tag {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--celadon);
  border: 1px solid rgba(79, 169, 140, 0.45);
  border-radius: var(--radius);
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber-bright);
}

.page-about .about-node--wide .about-node__year {
  font-size: clamp(2.75rem, 9vw, 4.25rem);
}

.page-about .about-node__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
  font-weight: 800;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-node > p {
  margin: 0 0 0.8rem;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.78);
}

.page-about .about-node > p:last-child {
  margin-bottom: 0;
}

.page-about .about-node .about-node__meta {
  margin: 0;
  padding-top: 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  opacity: 0.82;
  transition: opacity 0.24s ease;
}

.page-about .about-node:hover .about-node__meta,
.page-about .about-node:focus-within .about-node__meta {
  opacity: 1;
}

/* ---------- 03 团队与所在地 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: 58fr 42fr;
  }
}

.page-about .about-split__lede {
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.95;
  color: rgba(245, 241, 232, 0.8);
}

.page-about .about-places {
  margin: 1.75rem 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-place {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 0.75rem 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 560px) {
  .page-about .about-place {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: 1.5rem;
  }
}

.page-about .about-place dt {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-place dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.78);
}

.page-about .about-split__figure,
.page-about .about-docs__figure {
  margin: 0;
}

.page-about .about-split__figure img,
.page-about .about-docs__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-about .about-split__figure figcaption,
.page-about .about-docs__figure figcaption {
  margin-top: 0.75rem;
  padding-left: 0.75rem;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
  border-left: 1px solid var(--line-amber);
}

/* ---------- 04 文档体系 ---------- */
.page-about .about-docs {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-docs {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }
}

.page-about .about-docs__cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 560px) {
  .page-about .about-docs__cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-doc {
  padding: 1.2rem 1.25rem 1.4rem;
  background: var(--ink-900);
}

.page-about .about-doc__num {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-doc__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-doc p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-docs__foot {
  max-width: 46rem;
  margin: clamp(1.75rem, 3.5vw, 2.35rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--line-amber);
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--paper-dim);
}

/* ---------- 05 客户服务方式 ---------- */
.page-about .about-support {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-support__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 760px) {
  .page-about .about-support__row {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: 2rem;
    align-items: baseline;
  }
}

.page-about .about-support__num {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--amber-bright);
}

.page-about .about-support__text {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.8);
}

.page-about .about-support__note {
  margin: 1.5rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 06 长期合作 ---------- */
.page-about .about-coop {
  border-bottom: 0;
}

.page-about .about-coop__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.25rem);
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(23, 50, 74, 0.92), rgba(14, 34, 51, 0.98));
}

@media (min-width: 900px) {
  .page-about .about-coop__inner {
    grid-template-columns: 58fr 42fr;
    align-items: start;
  }
}

.page-about .about-coop__lead > p {
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.95;
  color: rgba(245, 241, 232, 0.82);
}

.page-about .about-coop__action {
  margin-top: 1.75rem !important;
}

.page-about .about-coop__stats {
  margin: 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-coop__stats > div {
  padding: 1.05rem 1rem 1.15rem;
  background: rgba(14, 34, 51, 0.92);
}

.page-about .about-coop__stats dt {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 1.875rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--celadon);
}

.page-about .about-coop__stats dd {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 页尾动作区 ---------- */
.page-about .about-foot {
  padding: clamp(2.25rem, 5.5vw, 3.5rem) 0;
  border-top: 1px solid var(--line-amber);
}

.page-about .about-foot__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.page-about .about-foot__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 降级与可访问性 ---------- */
.page-about img {
  max-width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-node::after,
  .page-about .about-node .about-node__meta,
  .page-about .about-years__link {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-node:focus-within {
    transform: none;
  }
}