/* ============================================================
   品牌概况 /profile/ —— 页面专属样式（作用域 .page-about）
   ============================================================ */

.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 7vw, 92px);
  background:
    radial-gradient(120% 88% at 92% 2%, rgba(255, 122, 47, .16), rgba(255, 122, 47, 0) 58%),
    radial-gradient(86% 70% at 2% 98%, rgba(15, 61, 51, .09), rgba(15, 61, 51, 0) 60%),
    var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 44px);
  margin-top: clamp(24px, 4vw, 48px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 6vw, 80px);
  }
}

.page-about .about-hero__eyebrow {
  color: var(--sage);
  margin: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-size: clamp(2.1rem, 6.2vw, 3.9rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.01em;
  max-width: 12em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 40em;
}

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

.page-about .about-hero__figure .figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

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

.page-about .figure__frame {
  overflow: hidden;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: clamp(24px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--sand);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 44px);
  }
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  font-weight: 500;
  line-height: 1;
  color: var(--deep);
  letter-spacing: .01em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: .875rem;
  letter-spacing: .05em;
  color: var(--sage);
}

/* ---------- 长文章节骨架（左旁注 + 右正文） ---------- */

.page-about .about-chapter {
  max-width: 1010px;
  margin-inline: auto;
  padding: clamp(48px, 8vw, 96px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 26px);
  border-top: 1px solid rgba(228, 192, 138, .55);
}

@media (min-width: 920px) {
  .page-about .about-chapter {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }
}

.page-about .about-side {
  position: static;
  display: flex;
  align-items: center;
  gap: 10px;
}

@media (min-width: 920px) {
  .page-about .about-side {
    position: sticky;
    top: 104px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

.page-about .about-side__mark {
  font-size: .9375rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--orange);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-side__mark::after {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--sand);
}

@media (min-width: 920px) {
  .page-about .about-side__mark::after {
    width: 34px;
  }
}

.page-about .about-body {
  max-width: 700px;
  min-width: 0;
}

.page-about .about-body .h2 {
  margin: 0 0 20px;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.22;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-body p {
  margin: 0 0 18px;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-body a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: var(--sand);
  text-underline-offset: 4px;
  transition: text-decoration-color var(--dur) var(--ease);
}

.page-about .about-body a:hover {
  text-decoration-color: var(--blue);
}

.page-about .about-pull {
  margin: 32px 0 0;
  padding-left: 20px;
  border-left: 3px solid var(--orange);
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--deep);
}

/* ---------- 三条业务线 ---------- */

.page-about .pillars {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .pillar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid rgba(228, 192, 138, .6);
}

@media (min-width: 640px) {
  .page-about .pillar {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-about .pillar__name {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--deep);
}

.page-about .pillar__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 发展历程 ---------- */

.page-about .about-figure {
  margin: 30px 0 34px;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--sand) 0%, rgba(228, 192, 138, .18) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 22px 0;
  border-bottom: 1px solid rgba(228, 192, 138, .5);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
}

.page-about .timeline__item:last-child {
  border-bottom: none;
}

@media (min-width: 640px) {
  .page-about .timeline__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 29px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(242, 69, 92, .12);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--coral-deep);
  transform: scale(1.18);
}

.page-about .timeline__year {
  font-size: .9375rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--sage);
  transition: color var(--dur) var(--ease);
}

.page-about .timeline__item:hover .timeline__year {
  color: var(--orange);
}

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

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(20, 17, 15, .84);
}

.page-about .timeline__item--now .timeline__year {
  color: var(--orange);
}

.page-about .timeline__item--now::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, .16);
}

/* ---------- 团队 ---------- */

.page-about .team-bar {
  display: flex;
  gap: 3px;
  height: 46px;
  margin: 30px 0 0;
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .team-bar__seg {
  flex-basis: 0;
  flex-shrink: 1;
  min-width: 10px;
  border-radius: 2px;
  transition: filter var(--dur) var(--ease);
}

.page-about .team-bar__seg:hover {
  filter: brightness(1.14);
}

.page-about .team-bar__seg--rnd { flex-grow: 32; background: var(--deep); }
.page-about .team-bar__seg--ops { flex-grow: 14; background: var(--orange); }
.page-about .team-bar__seg--cs  { flex-grow: 12; background: var(--coral); }
.page-about .team-bar__seg--dx  { flex-grow: 6;  background: var(--sand); }
.page-about .team-bar__seg--eco { flex-grow: 4;  background: var(--sage); }

.page-about .team-legend {
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 640px) {
  .page-about .team-legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 28px;
  }
}

.page-about .team-legend__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 12px;
  align-items: baseline;
  padding-top: 12px;
  border-top: 1px solid rgba(228, 192, 138, .6);
}

.page-about .team-legend__num {
  grid-row: 1 / span 2;
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--coral-deep);
  line-height: 1.3;
}

.page-about .team-legend__name {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-legend__note {
  font-size: .875rem;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 五条产品线 ---------- */

.page-about .lines {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 22px 0;
  border-top: 1px solid rgba(228, 192, 138, .6);
}

.page-about .line:last-child {
  border-bottom: 1px solid rgba(228, 192, 138, .6);
}

@media (min-width: 700px) {
  .page-about .line {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 28px;
    row-gap: 6px;
    align-items: start;
  }

  .page-about .line__code { grid-column: 1; grid-row: 1; }
  .page-about .line__name { grid-column: 1; grid-row: 2; }
  .page-about .line__text { grid-column: 2; grid-row: 1 / span 2; }
}

.page-about .line__code {
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--sage);
}

.page-about .line__name {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--deep);
  line-height: 1.4;
}

.page-about .line__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 服务网络 ---------- */

.page-about .network-facts {
  list-style: none;
  margin: 30px 0 26px;
  padding: 0;
}

.page-about .network-fact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid rgba(228, 192, 138, .6);
}

@media (min-width: 640px) {
  .page-about .network-fact {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-about .network-fact__key {
  font-size: .9375rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--coral-deep);
}

.page-about .network-fact p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-inline-link {
  margin-top: 6px;
}

/* ---------- 深墨绿资质区块 ---------- */

.page-about .about-certs {
  background: var(--deep);
  color: var(--paper);
  padding: clamp(56px, 9vw, 112px) 0;
}

.page-about .about-certs__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
}

@media (min-width: 900px) {
  .page-about .about-certs__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
}

.page-about .about-certs__eyebrow {
  margin: 0;
  color: var(--sand);
}

.page-about .about-certs__title {
  margin: 14px 0 18px;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.24;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-certs__lead {
  margin: 0;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(250, 245, 239, .8);
}

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

.page-about .cert {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 24px 0;
  border-top: 1px solid rgba(228, 192, 138, .32);
  transition: border-color var(--dur) var(--ease);
}

.page-about .cert:last-child {
  border-bottom: 1px solid rgba(228, 192, 138, .32);
}

@media (min-width: 700px) {
  .page-about .cert {
    grid-template-columns: 136px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

.page-about .cert:hover {
  border-color: var(--sand);
}

.page-about .cert:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
  border-radius: var(--r-sm);
}

.page-about .cert__code {
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--sand);
}

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

.page-about .cert__name {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cert__desc {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(250, 245, 239, .76);
}

/* ---------- 合作生态 ---------- */

.page-about .industries {
  list-style: none;
  margin: 30px 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

@media (min-width: 760px) {
  .page-about .industries {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 48px);
  }
}

.page-about .industry {
  padding: 18px 0;
  border-top: 1px solid rgba(228, 192, 138, .6);
}

.page-about .industry__name {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--deep);
}

.page-about .industry__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 收尾 ---------- */

.page-about .about-closing {
  padding: clamp(48px, 8vw, 96px) var(--gutter);
  border-top: 1px solid rgba(228, 192, 138, .55);
}

.page-about .about-closing__inner {
  max-width: 1010px;
  margin-inline: auto;
  padding: clamp(28px, 5vw, 56px);
  background: var(--warm-soft);
  border-radius: var(--r-lg);
}

.page-about .about-closing__title {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.24;
  font-weight: 900;
  color: var(--deep);
}

.page-about .about-closing p {
  margin: 0;
  max-width: 46em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

/* ---------- 键盘焦点 ---------- */

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 降低动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar__seg,
  .page-about .timeline__item::before,
  .page-about .timeline__year,
  .page-about .cert,
  .page-about .about-body a {
    transition: none;
  }

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