/* ===== 品牌总览页 page-about ===== */

.page-about {
  --about-panel-hover: #17365C;
  --about-ink-soft: rgba(244, 247, 251, 0.86);
  background: var(--ink-deep);
  color: var(--snow);
}

.page-about .eyebrow {
  margin: 0;
  font-size: var(--fs-7);
  letter-spacing: 0.14em;
  color: var(--gold);
  text-transform: uppercase;
}

/* ---------- 首屏声明 ---------- */

.page-about .about-masthead {
  padding-top: clamp(18px, 4vw, 44px);
  padding-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-masthead h1 {
  margin: 16px 0 0;
  max-width: 20ch;
  font-size: clamp(30px, 5.6vw, 54px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--snow);
}

.page-about .about-masthead__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: var(--fs-5);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-masthead__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
}

.page-about .about-masthead__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-fact__num {
  font-size: var(--fs-3);
  line-height: 1.05;
  color: var(--gold);
}

.page-about .about-fact__label {
  font-size: var(--fs-7);
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 左右分屏 ---------- */

.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 48px);
  padding-top: clamp(8px, 2vw, 20px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

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

/* ---------- 左列时间线 ---------- */

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

.page-about .about-rail__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.page-about .about-rail__figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--ink-night);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-rail__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.04) brightness(0.95);
}

.page-about .about-rail__title {
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: var(--fs-4);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--grass) 70%, transparent 100%);
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 18px 26px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(242, 183, 5, 0.16);
  transition: box-shadow 200ms var(--ease);
}

.page-about .about-timeline__item--data::before {
  background: var(--ink-deep);
  border: 2px solid var(--grass);
  box-shadow: none;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  box-shadow: 0 0 0 5px rgba(242, 183, 5, 0.2);
}

.page-about .about-timeline__season {
  display: block;
  font-size: var(--fs-7);
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-timeline__item--data .about-timeline__season {
  color: var(--grass);
}

.page-about .about-timeline__head {
  margin: 3px 0 0;
  font-size: var(--fs-6);
  font-weight: 700;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .about-timeline__text {
  margin: 5px 0 0;
  font-size: var(--fs-7);
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-timeline__meta {
  display: block;
  margin-top: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ice);
  transition: opacity 180ms var(--ease), max-height 180ms var(--ease), margin-top 180ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__meta,
.page-about .about-timeline__item:focus-within .about-timeline__meta {
  margin-top: 6px;
  max-height: 3em;
  opacity: 1;
}

/* ---------- 右列章节 ---------- */

.page-about .about-section {
  padding-bottom: clamp(28px, 4vw, 46px);
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.page-about .about-flow > .about-section:last-child {
  padding-bottom: 0;
}

.page-about .about-section:target h2 {
  color: var(--gold);
}

.page-about .about-section h2 {
  margin: 10px 0 18px;
  max-width: 26ch;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--snow);
  transition: color 180ms var(--ease);
}

.page-about .about-section .prose p {
  color: var(--about-ink-soft);
}

/* ---------- 服务对象 ---------- */

.page-about .about-audience {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-audience__item {
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--gold-deep);
  min-width: 0;
}

.page-about .about-audience__item:nth-child(2n) {
  border-left-color: var(--grass);
}

.page-about .about-audience__item h3 {
  margin: 0;
  font-size: var(--fs-5);
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-audience__item p {
  margin: 6px 0 0;
  font-size: var(--fs-6);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 关键数字 ---------- */

.page-about .about-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  min-width: 0;
  text-decoration: none;
  color: inherit;
  background: var(--ink-night);
  border-left: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-visible {
  background: var(--about-panel-hover);
  border-left-color: var(--grass);
}

.page-about .about-stat__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}

.page-about .about-stat__num {
  font-size: var(--fs-2);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-stat__unit {
  font-size: var(--fs-7);
  letter-spacing: 0.08em;
  color: var(--gold-deep);
}

.page-about .about-stat__label {
  font-size: var(--fs-7);
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 斜向分隔带 ---------- */

.page-about .about-slice {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  margin: clamp(26px, 4vw, 42px) 0;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  transform: skewY(-4deg);
  font-size: var(--fs-7);
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-slice > * {
  transform: skewY(4deg);
}

/* ---------- 团队与分工 ---------- */

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 6px;
}

.page-about .about-team-grid__text {
  min-width: 0;
}

.page-about .about-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--ink-night);
  border-top: 3px solid var(--grass);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.94);
}

.page-about .about-figure figcaption {
  padding: 12px 16px;
  font-size: var(--fs-7);
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage {
  position: relative;
  isolation: isolate;
  padding: clamp(24px, 4vw, 40px) clamp(18px, 3vw, 32px);
  background: var(--ink-night);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-coverage__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-about .about-coverage__bg img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.page-about .about-coverage__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(19, 44, 76, 0.92) 0%, rgba(10, 27, 51, 0.72) 100%);
}

.page-about .about-coverage__body {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-metric {
  padding: 18px;
  background: var(--ink-deep);
  min-width: 0;
}

.page-about .about-metric__label {
  font-size: var(--fs-7);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-metric__num {
  margin: 8px 0 0;
  font-size: var(--fs-3);
  line-height: 1;
  color: var(--gold);
}

/* ---------- 三条主线 ---------- */

.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 6px;
}

.page-about .about-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  min-width: 0;
}

.page-about .about-line h3 {
  margin: 0;
  font-size: var(--fs-4);
  font-weight: 800;
  line-height: 1.3;
  color: var(--snow);
}

.page-about .about-line p {
  margin: 0;
  font-size: var(--fs-6);
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-line__link {
  margin-top: auto;
  padding-top: 12px;
  align-self: stretch;
  font-size: var(--fs-6);
  color: var(--gold);
  text-decoration: none;
  border-top: 1px solid var(--gold-deep);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-line__link:hover,
.page-about .about-line__link:focus-visible {
  color: var(--snow);
  border-top-color: var(--gold);
}

/* ---------- 合作与联系 ---------- */

.page-about .about-cta {
  margin-top: clamp(14px, 3vw, 26px);
  padding: clamp(26px, 4vw, 38px) clamp(20px, 3vw, 32px);
  background: linear-gradient(118deg, var(--ink-night) 0%, #10365F 62%, var(--ink-night) 100%);
  border-top: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-cta__lede {
  margin: 0;
  max-width: 46ch;
  font-size: var(--fs-6);
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */

@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-about .about-masthead__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .about-grid {
    grid-template-columns: minmax(230px, 4fr) minmax(0, 8fr);
    gap: clamp(40px, 4vw, 72px);
    align-items: start;
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 32px;
    align-items: start;
  }
}

@media (hover: none) {
  .page-about .about-timeline__meta {
    margin-top: 6px;
    max-height: 3em;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-slice,
  .page-about .about-slice > * {
    transform: none;
  }
}