/* =========================================================
   品牌价值 / page-about
   ========================================================= */

.page-about {
  --about-measure: 44rem;
  background: var(--night);
  color: var(--sand);
  overflow-x: clip;
}

.page-about .about-narrow {
  max-width: var(--about-measure);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 38px) 0 clamp(46px, 7vw, 86px);
  background-color: var(--night);
  background-image:
    repeating-linear-gradient(90deg, var(--gridline) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--gridline) 0 1px, transparent 1px 72px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: 44%;
  height: 136%;
  background: linear-gradient(180deg, rgba(255, 90, 31, 0.22), rgba(255, 90, 31, 0.03) 62%, transparent);
  border-left: 1px solid rgba(255, 90, 31, 0.35);
  transform: skewX(-14deg);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 22px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 6.6vw, 3.55rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--sand);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 40rem;
  font-size: clamp(0.94rem, 1.6vw, 1.05rem);
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stat {
  padding: 14px 16px 16px;
  background: rgba(19, 42, 74, 0.78);
  border-top: 2px solid var(--gold);
}

.page-about .about-hero__stat-val {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.2vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-hero__stat-key {
  display: block;
  margin-top: 6px;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--paper);
}

/* ---------- 我们在做什么 ---------- */
.page-about .about-intro {
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-about .about-intro__text {
  margin-top: 20px;
}

.page-about .about-intro__cue {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 0.92rem;
  line-height: 1.76;
  color: var(--paper);
}

.page-about .about-intro__cue a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 发展历程时间轴 ---------- */
.page-about .about-history {
  padding-top: clamp(36px, 5vw, 60px);
  padding-bottom: clamp(44px, 6vw, 80px);
}

.page-about .about-history__lead {
  margin: 16px 0 0;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-history__track {
  list-style: none;
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 28px;
}

.page-about .about-history__track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), rgba(232, 180, 74, 0.55) 40%, rgba(201, 196, 184, 0.12));
}

.page-about .about-history__node {
  position: relative;
  padding-bottom: 26px;
}

.page-about .about-history__node:last-child {
  padding-bottom: 0;
}

.page-about .about-history__node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px var(--night);
}

.page-about .about-history__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-history__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--sand);
}

.page-about .about-history__text {
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--paper);
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  padding-top: clamp(44px, 6vw, 76px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

.page-about .about-team__grid {
  margin-top: 26px;
}

.page-about .about-team__lead {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--sand);
}

.page-about .duty-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .duty {
  padding: 16px 18px 18px;
  background: rgba(19, 42, 74, 0.5);
}

.page-about .duty__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .duty__name {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--sand);
}

.page-about .duty__text {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--paper);
}

.page-about .about-team__side {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

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

.page-about .about-team__note {
  margin: 0;
  padding: 16px 18px;
  border-left: 2px solid var(--orange);
  background: rgba(19, 42, 74, 0.45);
  font-size: 0.86rem;
  line-height: 1.76;
  color: var(--paper);
}

/* ---------- 服务能力 ---------- */
.page-about .about-cap {
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(44px, 6vw, 80px);
}

.page-about .about-cap__intro {
  margin: 14px 0 0;
  max-width: 40rem;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .cap-grid {
  margin-top: 26px;
}

.page-about .cap-card {
  position: relative;
  padding: 22px 22px 24px;
  background: linear-gradient(160deg, rgba(19, 42, 74, 0.9), rgba(11, 27, 51, 0.9));
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}

.page-about .cap-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .cap-card__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--sand);
}

.page-about .cap-card__text {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .cap-card__meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 服务范围色带 ---------- */
.page-about .about-region {
  position: relative;
  margin: clamp(44px, 6vw, 80px) 0;
  padding: clamp(44px, 6vw, 76px) 0;
  background:
    linear-gradient(180deg, rgba(5, 11, 22, 0.94), rgba(11, 27, 51, 0.97)),
    repeating-linear-gradient(115deg, rgba(232, 180, 74, 0.07) 0 2px, transparent 2px 24px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-region::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--gold) 42%, transparent 80%);
}

.page-about .about-region__media {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .about-region__media img {
  aspect-ratio: 12 / 5;
}

.page-about .about-region__lead {
  margin: 14px 0 0;
  max-width: 44rem;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-region__filters {
  margin: 26px 0 18px;
}

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

.page-about .region-card {
  position: relative;
  min-height: 164px;
  padding: 20px 20px 24px 24px;
  background: rgba(19, 42, 74, 0.55);
}

.page-about .region-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: var(--orange);
  opacity: 0.75;
}

.page-about .region-card__area {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .region-card__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1.42;
  color: var(--sand);
}

.page-about .region-card__text {
  margin: 8px 0 0;
  font-size: 0.87rem;
  line-height: 1.72;
  color: var(--paper);
}

.page-about .region-grid__empty {
  margin: 16px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-eco__media {
  margin: 0 0 clamp(28px, 4vw, 46px);
}

.page-about .about-eco__media img {
  aspect-ratio: 2 / 1;
}

.page-about .about-eco__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.page-about .about-eco__contact {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--paper);
}

/* ---------- 图片容器统一 ---------- */
.page-about .frame {
  position: relative;
  overflow: hidden;
  background: var(--slate);
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-about .about-hero::after {
    width: 64%;
    right: -34%;
    opacity: 0.72;
  }
}

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

@media (min-width: 700px) {
  .page-about .region-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 40px;
    align-items: end;
  }

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

  .page-about .about-team__grid {
    align-items: start;
  }

  .page-about .about-history__track {
    padding-left: 34px;
  }

  .page-about .about-history__node::before {
    left: -33px;
  }
}

@media (min-width: 1024px) {
  .page-about .region-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}