/* ===== 我们是谁 · 页面专属样式 ===== */

.page-about {
  background: var(--deep);
  color: var(--fog);
  overflow-x: clip;
}

/* 面包屑 */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--graphite);
}
.page-about .breadcrumbs a {
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}
.page-about .breadcrumbs [aria-current="page"] {
  color: var(--fog);
}

/* 首屏框景 */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 44px) clamp(38px, 6vw, 76px);
  background:
    radial-gradient(75% 110% at 92% -10%, rgba(47, 123, 255, 0.2), transparent 62%),
    radial-gradient(55% 90% at 4% 110%, rgba(32, 227, 210, 0.13), transparent 65%),
    var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .hero-grid {
  position: relative;
  isolation: isolate;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 4vw, 44px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: linear-gradient(158deg, rgba(11, 36, 64, 0.95) 0%, rgba(7, 26, 47, 0.8) 100%);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}
.page-about .hero-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(90deg, rgba(148, 168, 184, 0.07) 1px, transparent 1px),
    linear-gradient(rgba(148, 168, 184, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}
.page-about .hero-grid::after {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 0;
  border: 1px solid rgba(32, 227, 210, 0.14);
  border-radius: calc(var(--radius-l) - 8px);
  pointer-events: none;
}
.page-about .hero-copy,
.page-about .hero-media {
  position: relative;
  z-index: 1;
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-about .hero-kicker::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--fog);
}

.page-about .hero-copy .lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: #C4D8E6;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .hero-actions .btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.page-about .hero-media {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--cyan-line);
  background: rgba(3, 11, 20, 0.7);
  box-shadow: 0 0 46px rgba(32, 227, 210, 0.14);
}
.page-about .hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 双栏骨架 */
.page-about .about-body {
  display: grid;
  gap: 28px;
  padding-block: clamp(40px, 7vw, 88px);
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--graphite);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fog);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-about .about-index__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}
.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--cyan-line);
  background: rgba(32, 227, 210, 0.08);
}

/* 章节通用 */
.page-about .about-section {
  padding-block: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line);
}
.page-about .about-sections > .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-about .sec-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.page-about .sec-label::before {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  background: currentColor;
}
.page-about .about-section h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 4vw, 34px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--fog);
}
.page-about .about-section > p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: #C4D8E6;
}

/* 使命卡片 */
.page-about .mission-grid {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}
.page-about .mission-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(165deg, rgba(11, 36, 64, 0.92), rgba(7, 26, 47, 0.62));
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.page-about .mission-card:hover {
  border-color: var(--cyan-line);
  transform: translateY(-2px);
}
.page-about .mission-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}
.page-about .mission-card h3 {
  margin: 8px 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
}
.page-about .mission-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

/* 时间线 */
.page-about .tl-figure {
  margin: 26px 0 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: rgba(3, 11, 20, 0.5);
}
.page-about .tl-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 4px 30px;
  list-style: none;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(32, 227, 210, 0.1));
}
.page-about .tl-item {
  position: relative;
  margin-bottom: 10px;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(32, 227, 210, 0.12);
}
.page-about .tl-item:last-child::before {
  border-color: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 178, 62, 0.14);
}
.page-about .tl-item > details > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(11, 36, 64, 0.72);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.page-about .tl-item > details > summary::-webkit-details-marker {
  display: none;
}
.page-about .tl-item > details > summary:hover {
  border-color: var(--cyan-line);
}
.page-about .tl-item > details > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-about .tl-item > details > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
}
.page-about .tl-item > details[open] > summary {
  border-color: var(--cyan-line);
  background: rgba(32, 227, 210, 0.08);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.page-about .tl-item > details[open] > summary::after {
  content: "−";
}
.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
}
.page-about .tl-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
}
.page-about .tl-body {
  padding: 14px 16px 16px;
  border: 1px solid var(--cyan-line);
  border-top: 0;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  background: rgba(3, 11, 20, 0.42);
}
.page-about .tl-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

/* 团队 */
.page-about .team-figure {
  margin: 26px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: rgba(3, 11, 20, 0.5);
}
.page-about .team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.page-about .team-grid {
  display: grid;
  gap: 12px;
}
.page-about .team-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--blue);
  border-radius: var(--radius-m);
  background: rgba(11, 36, 64, 0.58);
  transition: border-left-color 0.3s var(--ease);
}
.page-about .team-card:hover {
  border-left-color: var(--cyan);
}
.page-about .team-tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-about .team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
}
.page-about .team-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

/* 规模数据 */
.page-about .reach-grid {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}
.page-about .reach-stat {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius-s);
  background: rgba(11, 36, 64, 0.6);
}
.page-about .reach-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1.15;
  color: var(--fog);
}
.page-about .reach-num small {
  margin-left: 3px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan);
}
.page-about .reach-cap {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--graphite);
}

.page-about .reach-legend {
  margin-top: 20px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(32, 227, 210, 0.09), rgba(11, 36, 64, 0.7) 62%);
}
.page-about .reach-legend__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite);
}
.page-about .reach-legend ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .reach-legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14px;
  line-height: 1.75;
  color: #C4D8E6;
}
.page-about .reach-legend .dot {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-radius: 50%;
  display: block;
}
.page-about .reach-legend .dot--cyan { background: var(--cyan); }
.page-about .reach-legend .dot--amber { background: var(--amber); }
.page-about .reach-legend .dot--blue { background: var(--blue); }
.page-about .reach-legend .dot--mint { background: var(--glass); }

/* 流程步骤 */
.page-about .step-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .step-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(11, 36, 64, 0.55);
}
.page-about .step-item__num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--cyan-line);
  border-radius: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}
.page-about .step-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
}
.page-about .step-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

/* 荣誉 */
.page-about .honor-panel {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(255, 178, 62, 0.16), transparent 58%),
    linear-gradient(150deg, rgba(11, 36, 64, 0.92), rgba(7, 26, 47, 0.7));
  box-shadow: var(--shadow-lift);
}
.page-about .honor-badge {
  justify-self: start;
  padding: 6px 12px;
  border: 1px solid rgba(255, 178, 62, 0.5);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}
.page-about .honor-text h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--fog);
}
.page-about .honor-text p {
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

/* 收束行动区 */
.page-about .about-cta {
  display: grid;
  gap: 20px;
  margin-top: clamp(28px, 5vw, 48px);
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(47, 123, 255, 0.24), transparent 60%),
    rgba(3, 11, 20, 0.68);
}
.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--fog);
}
.page-about .about-cta p:last-child {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: #C4D8E6;
}
.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .cta-actions .btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* 滚动显现 */
.page-about [data-reveal] {
  opacity: 1;
}
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal-ready] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
  }
  .page-about [data-reveal-ready][data-visible] {
    opacity: 1;
    transform: none;
  }
}

/* 中等屏 */
@media (min-width: 640px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .honor-panel {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }
}

@media (min-width: 760px) {
  .page-about .mission-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team-card--wide {
    grid-column: 1 / -1;
  }
}

/* 桌面双栏 */
@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-left: 18px;
    border-left: 1px solid var(--line);
  }
  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
  .page-about .about-index__list li + li {
    border-top: 1px solid rgba(148, 168, 184, 0.12);
  }
  .page-about .about-index__list a {
    min-height: 0;
    padding: 10px 0;
    border: 0;
    border-radius: 0;
    background: none;
    font-size: 14px;
    color: var(--graphite);
  }
  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    color: var(--fog);
    background: none;
  }
  .page-about .reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-about .cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }
  .page-about .hero-media {
    aspect-ratio: 11 / 8;
  }
  .page-about .hero-media img {
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-about .mission-card:hover {
    transform: none;
  }
}
<<<END>>>