/* ===== 品牌概况页 ===== */
.page-about {
  display: block;
  color: var(--text);
}

.page-about .about-context {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .section {
  padding: clamp(48px, 7vw, 96px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .section-head {
  display: block;
  max-width: 78ch;
  margin-bottom: clamp(26px, 3.5vw, 42px);
}

.page-about .section-title {
  margin: 10px 0 0;
}

.page-about .section-title strong {
  font-weight: 700;
  color: var(--cyan);
}

.page-about .section-head .lead {
  margin-top: 16px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 110% at 88% 0%, rgba(28, 191, 166, 0.18) 0%, rgba(7, 26, 22, 0) 64%),
    var(--ink-900);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(31, 74, 63, 0.5) 1px, transparent 1px);
  background-size: clamp(64px, 12vw, 148px) 100%;
  opacity: 0.4;
  pointer-events: none;
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  padding: clamp(30px, 5vw, 58px) 0 clamp(40px, 6vw, 76px);
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
    gap: clamp(40px, 5vw, 84px);
    align-items: end;
  }
}

.page-about .hero-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .hero-title strong {
  display: block;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .hero-text {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--text-muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 数据读出面板 */
.page-about .hero-readout {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-850), var(--ink-900));
}

.page-about .readout-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-about .readout-tag {
  color: var(--text-faint);
}

.page-about .readout-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--cyan);
}

.page-about .readout-live::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(61, 245, 212, 0.85);
}

.page-about .readout-list {
  margin: 0;
  padding: 0;
}

.page-about .readout-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .readout-row:last-child {
  border-bottom: 0;
}

.page-about .readout-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.page-about .readout-value {
  margin: 0;
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .readout-unit {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-muted);
}

/* ---------- 时间线骨架 ---------- */
.page-about .track-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 1024px) {
  .page-about .track-layout {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }
}

.page-about .track-head {
  margin-bottom: clamp(28px, 4vw, 46px);
}

/* 年份索引 */
.page-about .year-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

@media (min-width: 1024px) {
  .page-about .year-index {
    position: sticky;
    top: 116px;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 2px 0 2px 18px;
  }
}

.page-about .year-index-title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-about .year-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 1024px) {
  .page-about .year-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
}

.page-about .year-link {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .year-link:hover,
.page-about .year-link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-dim);
  background: var(--ink-800);
  outline: none;
}

.page-about .year-link:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .page-about .year-link {
    width: 100%;
    padding: 9px 0;
    border: 0;
    border-bottom: 1px solid transparent;
  }

  .page-about .year-link:hover,
  .page-about .year-link:focus-visible {
    background: transparent;
    border-color: transparent;
    border-bottom-color: var(--cyan);
  }
}

/* 时间线 */
.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(32px, 4vw, 50px) clamp(22px, 3vw, 34px);
  border-left: 1px solid var(--line);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--ink-900);
  border: 1px solid var(--cyan-dim);
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .tl-heading {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .tl-text {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted);
}

.page-about .tl-figure {
  margin-top: 22px;
}

.page-about .media-frame--3x2 {
  aspect-ratio: 3 / 2;
}

.page-about .media-frame--map {
  aspect-ratio: 12 / 7;
}

/* ---------- 四项能力 ---------- */
.page-about .cap-list {
  display: grid;
  border-top: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .cap-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 0;
  }

  .page-about .cap:nth-child(odd) {
    padding-right: clamp(24px, 3vw, 40px);
    border-right: 1px solid var(--line);
  }

  .page-about .cap:nth-child(even) {
    padding-left: clamp(24px, 3vw, 40px);
  }
}

.page-about .cap {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 16px;
  padding: clamp(22px, 3vw, 30px) 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s var(--ease);
}

.page-about .cap:hover {
  background: rgba(20, 56, 47, 0.45);
}

.page-about .cap-index {
  grid-column: 1;
  margin: 3px 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-dim);
}

.page-about .cap-title {
  grid-column: 2;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--text);
}

.page-about .cap-text {
  grid-column: 2;
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .cap-scene {
  grid-column: 2;
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text-faint);
}

.page-about .cap-scene-key {
  margin-right: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
}

@media (min-width: 980px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .team-list {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .team-item {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 620px) {
  .page-about .team-item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .team-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-muted);
}

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

/* ---------- 覆盖范围 ---------- */
.page-about .coverage-layout {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
}

@media (min-width: 980px) {
  .page-about .coverage-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
  }
}

.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .cov-stat {
  background: var(--ink-850);
  padding: 18px 16px;
}

.page-about .cov-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .cov-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text-muted);
}

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

/* ---------- 选择理由 ---------- */
.page-about .why-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .why-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .why-item {
  background: var(--ink-850);
  padding: clamp(22px, 3vw, 30px);
  transition: background 0.2s var(--ease);
}

.page-about .why-item:hover {
  background: var(--ink-800);
}

.page-about .why-index {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-faint);
}

.page-about .why-title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text);
}

.page-about .why-text {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .credit-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: clamp(16px, 2vw, 20px) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-size: 13px;
  color: var(--text-muted);
}

.page-about .credit-strip strong {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 15px;
  color: var(--cyan);
}

.page-about .why-note {
  margin: 18px 0 0;
  max-width: 74ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-faint);
}

.page-about .why-note a {
  color: var(--cyan-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .why-note a:hover,
.page-about .why-note a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(40px, 6vw, 76px) 0 clamp(56px, 8vw, 100px);
}

.page-about .cta-panel {
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  background:
    radial-gradient(95% 150% at 100% 0%, rgba(61, 245, 212, 0.13), rgba(7, 26, 22, 0) 62%),
    var(--ink-850);
}

@media (min-width: 900px) {
  .page-about .cta-panel {
    grid-template-columns: minmax(0, 1.45fr) auto;
    align-items: center;
    gap: 44px;
  }
}

.page-about .cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.35;
  color: var(--text);
}

.page-about .cta-text {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-about .readout-value {
    font-size: 18px;
  }

  .page-about .cap {
    grid-template-columns: 34px minmax(0, 1fr);
    column-gap: 12px;
  }

  .page-about .coverage-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .year-link {
    padding: 6px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .year-link,
  .page-about .tl-item::before,
  .page-about .cap,
  .page-about .why-item {
    transition: none;
  }
}