/* ============================================================
   品牌使命 /mission/ · page-about
   编辑部手记节奏：1px 竖线贯穿叙述，时间轴沿轴生长
   ============================================================ */

.page-about {
  --about-pad-y: clamp(50px, 7vw, 96px);
  position: relative;
  background: var(--ink);
  color: var(--warm);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-about h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.24;
  letter-spacing: -.005em;
  margin: 14px 0 0;
  color: var(--warm);
}

.page-about .eyebrow {
  font-family: var(--cond);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3.2vw, 38px);
}

/* ---------- 通用分栏 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 52px) 0 clamp(40px, 5.5vw, 78px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 240, 208, .11) 0%, rgba(53, 240, 208, 0) 58%),
    var(--ink);
}

.page-about .about-hero__main h1 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(31px, 6vw, 60px);
  line-height: 1.08;
  letter-spacing: -.012em;
  margin: .36em 0 0;
  color: var(--warm);
}

.page-about .about-hero__main .lede {
  margin: 24px 0 0;
  max-width: 60ch;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: rgba(244, 241, 233, .84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 首屏数据卡 ---------- */
.page-about .about-facts {
  background: linear-gradient(158deg, var(--panel) 0%, var(--carbon) 96%);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-card);
  padding: 22px 22px 10px;
  box-shadow: var(--shadow-1);
}

.page-about .about-facts__head {
  margin: 0 0 4px;
  font-family: var(--cond);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(244, 241, 233, .6);
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-facts__row dt {
  font-size: 14px;
  line-height: 1.5;
  color: rgba(244, 241, 233, .66);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 主张 ---------- */
.page-about .about-claim {
  padding: var(--about-pad-y) 0;
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

.page-about .about-claim__inner {
  max-width: 78ch;
  padding-left: clamp(18px, 3vw, 36px);
  border-left: 1px solid var(--line-strong);
}

.page-about .about-claim__title {
  margin: 0 0 .66em;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.3;
}

.page-about .about-claim__inner p {
  margin: 0 0 1.05em;
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.82;
  color: rgba(244, 241, 233, .82);
}

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

/* ---------- 内容流程（暖白分区） ---------- */
.page-about .about-flow {
  padding: var(--about-pad-y) 0;
  background: var(--warm);
  color: var(--carbon-ink);
}

.page-about .about-flow h2 {
  color: var(--carbon-ink);
}

.page-about .about-flow .eyebrow {
  color: #0B6B5B;
}

.page-about .about-flow__head {
  max-width: 76ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-flow__intro {
  margin: 18px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(35, 40, 42, .78);
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 22px 0 22px 58px;
  border-top: 1px solid rgba(35, 40, 42, .14);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid rgba(35, 40, 42, .14);
}

.page-about .about-flow__num {
  position: absolute;
  left: 0;
  top: 25px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #0B6B5B;
}

.page-about .about-flow__title {
  margin: 0 0 7px;
  font-family: var(--cond);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--carbon-ink);
}

.page-about .about-flow__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(35, 40, 42, .78);
}

.page-about .about-flow__figure {
  margin: 0;
  border: 1px solid rgba(35, 40, 42, .16);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--carbon);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-flow__figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 241, 233, .68);
  border-top: 1px solid var(--line);
  background: var(--carbon);
}

.page-about .about-cadence {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 42px);
  padding: 18px 20px;
  border: 1px solid rgba(35, 40, 42, .16);
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--r-card) var(--r-card) 0;
  background: rgba(255, 106, 43, .07);
}

.page-about .about-cadence__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, .18);
}

.page-about .about-cadence p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(35, 40, 42, .84);
}

.page-about .about-cadence a {
  color: #0B6B5B;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-section {
  padding: var(--about-pad-y) 0;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(90% 60% at 0% 0%, rgba(42, 42, 85, .58) 0%, rgba(42, 42, 85, 0) 64%),
    var(--ink);
}

.page-about .about-timeline-section__head {
  max-width: 62ch;
}

.page-about .about-timeline-map {
  margin: clamp(30px, 4vw, 44px) 0 clamp(34px, 4.6vw, 52px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--carbon);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-timeline-map figcaption {
  padding: 12px 18px;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 241, 233, .62);
  border-top: 1px solid var(--line);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 40px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(53, 240, 208, .38) 48%, rgba(53, 240, 208, .06) 100%);
}

.page-about .about-node {
  position: relative;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 25px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid rgba(53, 240, 208, .46);
  transition: background .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-node[open]::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, .16);
}

.page-about .about-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 19px;
  line-height: 1;
  color: rgba(244, 241, 233, .45);
  transition: color .2s var(--ease);
}

.page-about .about-node[open] .about-node__head::after {
  content: "\2212";
  color: var(--cyan);
}

.page-about .about-node__stage {
  flex: 0 0 auto;
  padding: 3px 11px;
  border: 1px solid rgba(53, 240, 208, .32);
  border-radius: var(--r-pill);
  font-family: var(--cond);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-node__title {
  flex: 1 1 220px;
  font-family: var(--serif);
  font-size: clamp(17px, 2.1vw, 23px);
  font-weight: 700;
  line-height: 1.38;
  color: var(--warm);
}

.page-about .about-node__body {
  max-width: 66ch;
  padding: 12px 0 0;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 241, 233, .78);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad-y) 0;
  background: var(--carbon);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__intro p {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(244, 241, 233, .8);
}

.page-about .about-roles__bar {
  display: flex;
  width: 100%;
  height: 54px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
}

.page-about .about-roles__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  transition: filter .2s var(--ease);
}

.page-about .about-roles__seg--edit {
  flex: 26 1 0;
  background: var(--cyan);
  color: #06231E;
}

.page-about .about-roles__seg--data {
  flex: 11 1 0;
  background: var(--orange);
  color: #23120A;
}

.page-about .about-roles__seg--video {
  flex: 8 1 0;
  background: var(--warm);
  color: #23282A;
}

.page-about .about-roles__seg:hover {
  filter: brightness(1.1);
}

.page-about .about-roles__legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-roles__item {
  padding: 15px 17px 17px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: rgba(20, 69, 59, .26);
}

.page-about .about-roles__item h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 6px;
  font-family: var(--cond);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--warm);
}

.page-about .about-roles__item h3::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

.page-about .about-roles__item--edit h3::before { background: var(--cyan); }
.page-about .about-roles__item--data h3::before { background: var(--orange); }
.page-about .about-roles__item--video h3::before { background: var(--warm); }

.page-about .about-roles__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 241, 233, .72);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner {
  padding: var(--about-pad-y) 0;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(160deg, var(--indigo) 0%, var(--ink) 84%);
}

.page-about .about-partner__intro p {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(244, 241, 233, .82);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-tags .tag {
  font-family: var(--cond);
  font-size: 13px;
  letter-spacing: .05em;
}

.page-about .about-partner__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--carbon);
  box-shadow: var(--shadow-2);
}

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

.page-about .about-partner__figure figcaption {
  padding: 12px 16px;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 241, 233, .64);
  border-top: 1px solid var(--line);
}

.page-about .about-partner__metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(30px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--line);
}

.page-about .about-partner__metric {
  padding: 20px 20px 22px;
  background: rgba(11, 43, 38, .9);
}

.page-about .about-partner__metric-num {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-partner__metric-num span {
  margin-left: 8px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .02em;
  color: rgba(244, 241, 233, .62);
}

.page-about .about-partner__metric-label {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(244, 241, 233, .68);
}

/* ---------- 内容原则（暖白分区） ---------- */
.page-about .about-principles {
  padding: var(--about-pad-y) 0;
  background: var(--warm);
  color: var(--carbon-ink);
}

.page-about .about-principles h2 {
  color: var(--carbon-ink);
}

.page-about .about-principles .eyebrow {
  color: #0B6B5B;
}

.page-about .about-principles p {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(35, 40, 42, .8);
}

.page-about .about-awards {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(35, 40, 42, .16);
}

.page-about .about-awards__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(35, 40, 42, .16);
}

.page-about .about-awards__years {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #0B6B5B;
}

.page-about .about-awards__text {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--carbon-ink);
}

/* ---------- 行动入口 ---------- */
.page-about .about-cta {
  padding: var(--about-pad-y) 0;
  background:
    radial-gradient(100% 80% at 50% 100%, rgba(255, 106, 43, .10) 0%, rgba(255, 106, 43, 0) 62%),
    var(--ink);
}

.page-about .about-cta__head {
  max-width: 68ch;
}

.page-about .about-cta__head p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(244, 241, 233, .8);
}

.page-about .about-cta__list {
  list-style: none;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-cta__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: linear-gradient(158deg, rgba(20, 69, 59, .52) 0%, rgba(18, 20, 23, .78) 100%);
  transition: transform .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-cta__item:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-about .about-cta__item h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--warm);
}

.page-about .about-cta__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(244, 241, 233, .78);
}

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

.page-about .about-cta__link {
  margin-top: auto;
  padding-top: 6px;
}

.page-about .about-cta__link a {
  font-family: var(--cond);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, .48);
  padding-bottom: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-roles__legend {
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  }

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

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

  .page-about .about-awards__item {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-cols--wide-left {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-cols--wide-right {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

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

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

@media (max-width: 899px) {
  .page-about .about-timeline {
    padding-left: 22px;
  }

  .page-about .about-timeline::before {
    left: 5px;
  }

  .page-about .about-node::before {
    left: -22px;
    top: 23px;
  }

  .page-about .about-node__head::after {
    margin-left: 0;
  }
}

@media (max-width: 560px) {
  .page-about .about-roles__bar {
    height: 46px;
  }

  .page-about .about-roles__seg {
    font-size: 12px;
  }

  .page-about .about-flow__step {
    padding-left: 48px;
  }

  .page-about .about-cadence {
    border-radius: 0 var(--r-card) var(--r-card) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cta__item,
  .page-about .about-node::before,
  .page-about .about-roles__seg,
  .page-about .about-node__head::after {
    transition: none;
  }

  .page-about .about-cta__item:hover {
    transform: none;
  }

  .page-about .about-roles__seg:hover {
    filter: none;
  }
}