/* ===== 品牌档案 / page-about ===== */
.page-about {
  --about-body: #C4D1DC;
  --about-body-ink: #46545F;
  --about-cyan-ink: #0B7A66;
  --about-panel: #12212F;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-about h1,
.page-about h2,
.page-about h3,
.page-about p,
.page-about dl,
.page-about dd,
.page-about ol,
.page-about ul,
.page-about figure {
  margin: 0;
}

.page-about .about-crumbs {
  padding-block: 22px 0;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--muted);
}

.page-about .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---- 框景首屏 ---- */
.page-about .about-hero {
  padding-block: clamp(20px, 3vw, 34px) clamp(46px, 7vw, 84px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-hero__frame {
  position: relative;
  border: 2px solid var(--line-strong);
  padding: clamp(24px, 4.4vw, 52px) clamp(20px, 3.6vw, 46px) clamp(20px, 3vw, 34px);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(0, 230, 178, 0.09), transparent 58%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  box-shadow: var(--hard-shadow);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 2px solid var(--cyan);
}

.page-about .about-hero__frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -2px;
  bottom: -2px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--cyan);
  margin-bottom: 18px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin-bottom: 20px;
}

.page-about .about-hero__lead {
  max-width: 40em;
  color: var(--about-body);
  font-size: 16px;
}

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

.page-about .about-hero__scale {
  height: 10px;
  margin-top: 30px;
  border-bottom: 2px solid var(--line);
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 18px);
}

.page-about .about-facts {
  border-top: 2px solid var(--line-strong);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--muted);
}

.page-about .about-facts dd {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  color: var(--cyan);
}

.page-about .about-hero__side-note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--signal);
  font-size: 14px;
  color: var(--muted);
}

/* ---- 章节基座 ---- */
.page-about .section {
  padding-block: clamp(54px, 8vw, 104px);
}

.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(25px, 3.4vw, 38px);
  line-height: 1.22;
  margin-bottom: 18px;
}

.page-about .about-lead {
  max-width: 42em;
  color: var(--about-body);
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-prose p {
  max-width: 40em;
  margin-bottom: 18px;
}

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

.page-about .about-textlink {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 230, 178, 0.4);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-textlink:hover {
  border-bottom-color: var(--cyan);
}

/* 暖纸白反相分区 */
.page-about .section--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .section--paper .about-kicker {
  color: var(--about-cyan-ink);
}

.page-about .section--paper .about-lead,
.page-about .section--paper .about-prose p {
  color: var(--about-body-ink);
}

/* ---- 01 起点 ---- */
.page-about .about-origin__grid {
  align-items: start;
}

.page-about .about-note {
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--hard-shadow);
  padding: 22px 20px;
  margin-top: 30px;
}

.page-about .about-note__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--about-cyan-ink);
  margin-bottom: 14px;
}

.page-about .about-note__list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-note__list li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-ink);
  padding-top: 14px;
  border-top: 1px solid var(--paper-2);
}

.page-about .about-note__list li:first-child {
  padding-top: 0;
  border-top: 0;
}

/* ---- 通用图框 ---- */
.page-about .about-figure {
  border: 2px solid var(--line-strong);
  background: var(--ink-2);
  box-shadow: var(--hard-shadow);
  margin-bottom: clamp(26px, 4vw, 44px);
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---- 02 时间轴 ---- */
.page-about .timeline {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .timeline__item {
  position: relative;
  padding-top: 18px;
  border-top: 2px solid var(--line-strong);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-about .timeline__year {
  font-size: 20px;
  font-weight: 500;
  color: var(--cyan);
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.35;
  margin: 8px 0 8px;
}

.page-about .timeline__sum {
  font-size: 15px;
  color: var(--about-body);
}

.page-about .timeline__more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-about .timeline__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.2px;
  color: var(--cyan);
}

.page-about .timeline__more summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__more summary::after {
  content: " +";
}

.page-about .timeline__more[open] summary::after {
  content: " −";
}

.page-about .timeline__more p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---- 03 团队 ---- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .team-bar {
  display: flex;
  height: 46px;
  border: 2px solid var(--line-strong);
  margin-bottom: 26px;
  overflow: hidden;
}

.page-about .team-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .team-bar__seg--eng {
  width: 39.1%;
  background: var(--cyan);
}

.page-about .team-bar__seg--edit {
  width: 23.9%;
  background: #7FDCC6;
}

.page-about .team-bar__seg--serv {
  width: 19.6%;
  background: var(--paper-2);
}

.page-about .team-bar__seg--prod {
  width: 17.4%;
  background: var(--muted);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .team-card {
  border: 2px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  padding: 22px 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--cyan);
  transform: translate(2px, 2px);
  box-shadow: var(--hard-shadow);
}

.page-about .team-card__num {
  font-size: 30px;
  font-weight: 500;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 10px;
}

.page-about .team-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  margin-bottom: 8px;
}

.page-about .team-card__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-figure--side {
  margin-bottom: 0;
}

/* ---- 04 数据来源 ---- */
.page-about .section--paper .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .section--paper .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.2px;
  padding: 8px 14px;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .section--paper .filter-btn:hover {
  transform: translate(2px, 2px);
}

.page-about .section--paper .filter-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.page-about .source-list {
  list-style: none;
  padding: 0;
  border-top: 2px solid var(--ink);
}

.page-about .source-list__item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--paper-2);
}

.page-about .source-list__item[hidden] {
  display: none;
}

.page-about .source-list__tag {
  justify-self: start;
  font-size: 11px;
  letter-spacing: 1.4px;
  color: var(--about-cyan-ink);
  border: 1px solid var(--about-cyan-ink);
  padding: 3px 9px;
}

.page-about .source-list__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .source-list__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body-ink);
  max-width: 46em;
}

.page-about .about-source__flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: clamp(34px, 5vw, 58px);
}

.page-about .about-source__flow .about-figure {
  margin-bottom: 0;
  border-color: var(--ink);
  background: var(--paper);
  box-shadow: var(--hard-shadow);
}

.page-about .about-source__flow .about-figure figcaption {
  border-top-color: var(--ink);
  color: var(--about-body-ink);
}

.page-about .about-steps__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--about-cyan-ink);
  margin-bottom: 14px;
}

.page-about .about-flow {
  display: block;
  width: 100%;
  height: 34px;
  color: var(--ink);
  margin-bottom: 18px;
}

.page-about .steps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .steps__item {
  border: 2px solid var(--ink);
  padding: 18px 18px 20px;
  background: rgba(10, 22, 34, 0.03);
}

.page-about .steps__num {
  font-size: 22px;
  font-weight: 500;
  color: var(--about-cyan-ink);
  line-height: 1;
  margin-bottom: 10px;
}

.page-about .steps__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 6px;
}

.page-about .steps__item p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body-ink);
}

/* ---- 05 运行保障 ---- */
.page-about .ops-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ops-cell {
  border: 2px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  padding: 22px 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ops-cell:hover {
  border-color: var(--cyan);
  transform: translate(2px, 2px);
}

.page-about .ops-cell__num {
  font-size: 20px;
  font-weight: 500;
  color: var(--cyan);
  line-height: 1.3;
  margin-bottom: 8px;
  overflow-wrap: anywhere;
}

.page-about .ops-cell__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 8px;
}

.page-about .ops-cell__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-stamp {
  margin-top: 14px;
  padding: 7px 10px;
  border: 1px dashed var(--line-strong);
  font-size: 12px;
  letter-spacing: 1.2px;
  color: var(--paper-2);
}

.page-about .copy-btn {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.2px;
  padding: 6px 12px;
  border: 2px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .copy-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translate(2px, 2px);
}

.page-about .copy-btn[data-copy-state="done"] {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---- 06 年度发布 ---- */
.page-about .about-annual__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-annual__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-annual__tags-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--muted);
  margin-bottom: 12px;
}

.page-about .about-annual__tags-title:not(:first-child) {
  margin-top: 26px;
}

.page-about .award-tags {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .award-tags .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.2px;
  padding: 6px 11px;
  border: 2px solid var(--line-strong);
  color: var(--paper-2);
}

.page-about .award-tags .tag--cyan {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .award-tags .tag--signal {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---- 07 合作方式 ---- */
.page-about .coop-list {
  list-style: none;
  padding: 0;
  border-top: 2px solid var(--line-strong);
}

.page-about .coop-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 26px 0;
  border-bottom: 2px solid var(--line);
}

.page-about .coop-item__idx {
  font-size: 14px;
  letter-spacing: 1.4px;
  color: var(--cyan);
  padding-top: 6px;
}

.page-about .coop-item__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 21px;
  margin-bottom: 10px;
}

.page-about .coop-item__text {
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
  margin-bottom: 12px;
}

.page-about .coop-item__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .coop-item__link:hover {
  border-bottom-color: var(--cyan);
  transform: translate(2px, 2px);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-cta__note {
  margin-top: 18px;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---- 断点 ---- */
@media (min-width: 640px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 8fr) minmax(220px, 3fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-source__flow {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-annual__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .coop-item {
    grid-template-columns: 60px 1fr;
    gap: 24px;
    padding: 30px 0;
  }

  .page-about .about-note {
    margin-top: 0;
  }
}

@media (min-width: 1100px) {
  .page-about .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ops-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .ops-cell,
  .page-about .coop-item__link,
  .page-about .copy-btn,
  .page-about .section--paper .filter-btn,
  .page-about .breadcrumbs a {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within,
  .page-about .ops-cell:hover,
  .page-about .coop-item__link:hover,
  .page-about .copy-btn:hover,
  .page-about .section--paper .filter-btn:hover {
    transform: none;
  }
}