/* =========================================================
   ET9 登录官方版 · 品牌使命
   作用域：.page-about
   ========================================================= */

.page-about {
  display: block;
}

/* ---------- 页首 ---------- */

.page-about .about-head {
  position: relative;
  padding: clamp(92px, 13vw, 168px) 0 clamp(36px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(130% 105% at 92% -10%, rgba(108, 59, 255, .24), transparent 60%),
    radial-gradient(95% 85% at -6% 112%, rgba(43, 224, 208, .10), transparent 58%);
}

.page-about .about-head::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, var(--grid-line) 1px, transparent 1px);
  background-size: calc(100% / 4) 100%;
}

.page-about .about-head > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-kicker {
  margin: 28px 0 0;
  color: var(--c-cyan);
}

.page-about .about-title {
  margin: 18px 0 0;
  max-width: 21ch;
  font-family: var(--font-display);
  font-weight: 250;
  font-size: clamp(1.95rem, 5.4vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--c-white);
}

.page-about .about-lede {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.35vw, 1.08rem);
  line-height: 1.85;
  color: var(--c-white);
  opacity: .82;
}

.page-about .about-headline-line {
  margin: 42px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-mist);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  position: relative;
  padding: clamp(48px, 8vw, 100px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section--panel {
  background: var(--c-panel);
}

.page-about .about-section--indigo {
  background: var(--c-indigo);
}

.page-about .about-section--teal {
  background: var(--c-teal);
}

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

.page-about .about-aside {
  display: grid;
  align-content: start;
  gap: 14px;
}

.page-about .about-num {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--c-cyan);
}

.page-about .about-aside-note {
  margin: 0;
  font-size: .82rem;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--c-void);
  overflow: hidden;
}

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

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

.page-about .about-h2 {
  margin: 12px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--c-white);
}

.page-about .about-body .prose {
  margin-top: 22px;
  max-width: 66ch;
}

.page-about .about-after-grid {
  margin-top: 28px;
}

.page-about .about-section-lead {
  margin-bottom: clamp(30px, 5vw, 52px);
  max-width: 70ch;
}

.page-about .about-lead-text {
  margin: 20px 0 0;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .aside-note {
  margin-top: 28px;
  max-width: 70ch;
}

/* ---------- 使命引用 ---------- */

.page-about .about-quote {
  margin: 30px 0 0;
  padding: 24px 24px 24px 26px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-violet);
  background: rgba(34, 27, 74, .82);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  line-height: 1.6;
  color: var(--c-white);
}

/* ---------- 提报流程 ---------- */

.page-about .flow {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
}

.page-about .flow-step {
  display: grid;
  align-content: start;
  gap: 9px;
  padding: 24px 22px 28px;
  background: rgba(232, 236, 250, .035);
}

.page-about .flow-step + .flow-step {
  border-top: 1px solid var(--line);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-violet-soft);
}

.page-about .flow-title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 400;
  color: var(--c-white);
}

.page-about .flow-text {
  margin: 0;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 双周节奏数据条 ---------- */

.page-about .cadence-strip {
  margin-top: clamp(30px, 5vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid rgba(232, 236, 250, .22);
}

.page-about .cadence-cell {
  display: grid;
  gap: 8px;
  padding: 22px 0 20px;
  border-bottom: 1px solid rgba(232, 236, 250, .14);
}

.page-about .cadence-num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.6vw, 3.1rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--c-cyan);
}

.page-about .cadence-key {
  font-size: .84rem;
  line-height: 1.6;
  color: var(--c-white);
  opacity: .78;
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  margin-top: clamp(26px, 4vw, 40px);
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
}

.page-about .team-card {
  padding: 26px 22px 30px;
  background: rgba(232, 236, 250, .035);
}

.page-about .team-card + .team-card {
  border-top: 1px solid var(--line);
}

.page-about .team-card-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-about .team-card-t {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 400;
  color: var(--c-white);
}

.page-about .team-card-p {
  margin: 10px 0 0;
  font-size: .87rem;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 时间轴 ---------- */

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

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-about .about-media .media-caption {
  margin-top: 12px;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line-strong);
}

.page-about .tl-item {
  position: relative;
  padding: 22px 0 26px;
  border-bottom: 1px solid var(--line);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
}

.page-about .tl-title {
  margin: 12px 0 0;
  font-size: .95rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--c-white);
}

.page-about .tl-text {
  margin: 9px 0 0;
  font-size: .84rem;
  line-height: 1.78;
  color: var(--c-mist);
}

/* ---------- 质量与资质 ---------- */

.page-about .qual-grid {
  margin-top: clamp(26px, 4vw, 40px);
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
}

.page-about .qual-card {
  padding: 26px 22px 30px;
  background: rgba(232, 236, 250, .04);
}

.page-about .qual-card + .qual-card {
  border-top: 1px solid var(--line);
}

.page-about .qual-card-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-about .qual-card-t {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 400;
  color: var(--c-white);
}

.page-about .qual-card-p {
  margin: 10px 0 0;
  font-size: .87rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .qual-more {
  margin-top: 20px;
  border: 1px solid var(--line);
  background: rgba(232, 236, 250, .04);
}

.page-about .qual-more > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-white);
}

.page-about .qual-more > summary::-webkit-details-marker {
  display: none;
}

.page-about .qual-more > summary::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--c-orange);
}

.page-about .qual-more[open] > summary::before {
  content: "\2212";
}

.page-about .qual-more-body {
  padding: 4px 22px 26px;
}

.page-about .qual-more-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .qual-more-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  font-size: .86rem;
  line-height: 1.8;
  color: var(--c-white);
  opacity: .86;
}

.page-about .qual-more-num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--c-cyan);
}

/* ---------- 合作角色 ---------- */

.page-about .role-list {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

.page-about .role-item {
  display: grid;
  gap: 10px;
  padding: 26px 0 28px;
  border-bottom: 1px solid var(--line);
}

.page-about .role-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--c-white);
}

.page-about .role-body p {
  margin: 0;
  max-width: 68ch;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--c-mist);
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  background:
    radial-gradient(110% 130% at 82% 8%, rgba(108, 59, 255, .22), transparent 62%),
    var(--c-void);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 30px;
}

.page-about .about-cta-note {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--c-mist);
}

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

/* =========================================================
   响应式
   ========================================================= */

@media (min-width: 640px) {
  .page-about .about-head::before {
    background-size: calc(100% / 8) 100%;
  }

  .page-about .cadence-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid rgba(232, 236, 250, .14);
  }

  .page-about .cadence-cell {
    padding: 26px 20px 24px 0;
    border-bottom: 0;
  }

  .page-about .cadence-cell + .cadence-cell {
    padding-left: 22px;
    border-left: 1px solid rgba(232, 236, 250, .14);
  }

  .page-about .qual-more-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-head::before {
    background-size: calc(100% / 12) 100%;
  }

  .page-about .about-cols {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-about .about-section-lead {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 16px 56px;
    align-items: end;
    max-width: none;
  }

  .page-about .about-section-lead .kicker {
    grid-column: 1 / -1;
  }

  .page-about .about-section-lead .about-h2 {
    max-width: 22ch;
  }

  .page-about .about-lead-text {
    margin: 0;
  }

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

  .page-about .flow-step + .flow-step {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

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

  .page-about .team-card + .team-card {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

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

  .page-about .qual-card:nth-child(2) {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .qual-card:nth-child(3) {
    border-left: 0;
  }

  .page-about .qual-card:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .page-about .qual-card:nth-child(4) {
    border-left: 1px solid var(--line);
  }

  .page-about .role-item {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
    padding: 30px 0 32px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 52px;
    align-items: end;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
    max-width: 320px;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .tl-item {
    padding: 34px 22px 36px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .tl-item:not(:first-child) {
    padding-left: 22px;
  }

  .page-about .tl-item:last-child {
    border-right: 0;
  }

  .page-about .tl-item::before {
    content: "";
    position: absolute;
    top: -5px;
    left: 0;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--c-cyan);
    box-shadow: 0 0 0 4px rgba(43, 224, 208, .13);
  }

  .page-about .tl-item:not(:first-child)::before {
    left: 22px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-cols {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .tl-item {
    padding-right: 28px;
  }

  .page-about .tl-item:not(:first-child) {
    padding-left: 28px;
  }

  .page-about .tl-item:not(:first-child)::before {
    left: 28px;
  }
}