.page-about {
  --about-gold-deep: #7E5F1C;
  --about-card-bg: rgba(18, 58, 48, 0.62);
  --about-rule: rgba(245, 241, 230, 0.12);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .ky-container {
  width: 100%;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: clamp(16px, 2.4vw, 26px) 0 0;
}
.page-about .about-crumb__sep {
  color: rgba(201, 162, 74, 0.55);
  padding: 0 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(58% 68% at 94% 4%, rgba(91, 108, 255, 0.18), transparent 62%),
    radial-gradient(52% 62% at 2% 98%, rgba(201, 162, 74, 0.12), transparent 66%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero__kicker {
  color: var(--gold);
  letter-spacing: 0.2em;
}

.page-about .about-hero__title {
  margin: clamp(14px, 2vw, 24px) 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 84px);
  line-height: 1.07;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold);
}

.page-about .about-hero__lead {
  margin-top: clamp(16px, 2.4vw, 28px);
  max-width: 46ch;
  color: rgba(245, 241, 230, 0.78);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: rgba(18, 58, 48, 0.72);
  padding: clamp(12px, 2vw, 18px);
  transition: background 0.25s ease;
}

.page-about .about-facts__item:hover {
  background: rgba(28, 81, 67, 0.85);
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--gold-bright);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

/* ---------- 起点：纸白跨页 ---------- */
.page-about .about-origin {
  background: var(--paper);
  color: var(--black);
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  padding: clamp(46px, 7vw, 96px) 0;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 52px);
  align-items: start;
}

.page-about .about-origin__kicker {
  color: var(--about-gold-deep);
}

.page-about .about-origin__title {
  margin-top: 10px;
  color: var(--ink);
}

.page-about .about-origin__body p + p {
  margin-top: 16px;
}

.page-about .about-origin__body .ky-body {
  color: #22322C;
}

.page-about .about-origin__quote {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 2px 0 2px clamp(16px, 2.4vw, 22px);
  border-left: 3px solid var(--gold);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 23px);
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(52px, 8vw, 108px) 0;
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 18%, #000 82%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 18%, #000 82%, transparent);
}

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

.page-about .about-timeline__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline__head {
  max-width: 60ch;
  margin-bottom: clamp(30px, 4.6vw, 56px);
}

.page-about .about-timeline__title {
  margin-top: 10px;
  color: var(--paper);
}

.page-about .about-timeline__lead {
  margin-top: 14px;
  color: rgba(245, 241, 230, 0.72);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .tl__item {
  position: relative;
  border-left: 1px solid var(--line);
  padding: 0 0 clamp(24px, 3.4vw, 40px) clamp(20px, 3vw, 32px);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--gold);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .tl__item:hover::before {
  background: var(--gold-bright);
  box-shadow: 0 0 0 5px rgba(201, 162, 74, 0.14);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 54px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
  transition: color 0.25s ease;
}

.page-about .tl__item:hover .tl__year {
  color: var(--gold-bright);
}

.page-about .tl__title {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 241, 230, 0.72);
}

.page-about .tl__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin 0.3s ease, padding 0.3s ease;
}

.page-about .tl__item:hover .tl__more,
.page-about .tl__item:focus-within .tl__more {
  max-height: 9em;
  opacity: 1;
  margin-top: 10px;
  padding-left: 12px;
  border-left-color: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-2);
  padding: clamp(50px, 7vw, 98px) 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__head {
  max-width: 58ch;
  margin-bottom: clamp(28px, 4vw, 50px);
}

.page-about .about-team__title {
  margin-top: 10px;
  color: var(--paper);
}

.page-about .about-team__lead {
  margin-top: 14px;
  color: rgba(245, 241, 230, 0.74);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-team__chart {
  margin: 0;
  text-align: center;
}

.page-about .donut {
  display: block;
  width: min(266px, 68vw);
  height: auto;
  margin: 0 auto;
  overflow: visible;
}

.page-about .donut__track {
  fill: none;
  stroke: rgba(245, 241, 230, 0.1);
  stroke-width: 22;
}

.page-about .donut__seg {
  fill: none;
  stroke-width: 22;
  transition: stroke-width 0.25s ease, opacity 0.25s ease;
}

.page-about .donut__seg--a {
  stroke: var(--gold);
  stroke-dasharray: 155.23 439.82;
  stroke-dashoffset: 0;
}

.page-about .donut__seg--b {
  stroke: var(--data-blue);
  stroke-dasharray: 135.83 439.82;
  stroke-dashoffset: -155.23;
}

.page-about .donut__seg--c {
  stroke: var(--data-teal);
  stroke-dasharray: 148.76 439.82;
  stroke-dashoffset: -291.06;
}

.page-about .donut circle:hover {
  stroke-width: 29;
}

.page-about .donut__total {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  fill: var(--paper);
}

.page-about .donut__unit {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.1em;
  fill: var(--mute);
}

.page-about .about-team__caption {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .team-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-legend__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: clamp(13px, 2vw, 18px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(10, 36, 31, 0.35);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about .team-legend__item:hover {
  border-color: var(--gold);
  background: rgba(28, 81, 67, 0.6);
  transform: translateY(-2px);
}

.page-about .team-legend__dot {
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 50%;
}

.page-about .team-legend__dot--a {
  background: var(--gold);
}

.page-about .team-legend__dot--b {
  background: var(--data-blue);
}

.page-about .team-legend__dot--c {
  background: var(--data-teal);
}

.page-about .team-legend__name {
  display: block;
  font-weight: 800;
  font-size: 16px;
  color: var(--paper);
}

.page-about .team-legend__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 241, 230, 0.7);
}

.page-about .team-legend__count {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .about-team__media {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
}

.page-about .about-team__media-cap {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mute);
}

/* ---------- 流程带 ---------- */
.page-about .about-flow {
  background: var(--paper);
  color: var(--black);
  padding: clamp(50px, 7vw, 100px) 0;
}

.page-about .about-flow__head {
  max-width: 58ch;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-flow .ky-kicker {
  color: var(--about-gold-deep);
}

.page-about .about-flow__title {
  margin-top: 10px;
  color: var(--ink);
}

.page-about .about-flow__lead {
  margin-top: 14px;
  color: #3B4A44;
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .flow__step {
  position: relative;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid rgba(16, 24, 21, 0.16);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.55);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .flow__step:hover,
.page-about .flow__step:focus-visible {
  border-color: var(--about-gold-deep);
  background: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  outline: none;
}

.page-about .flow__step:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .flow__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--about-gold-deep);
}

.page-about .flow__title {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .flow__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3B4A44;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding: clamp(50px, 7vw, 100px) 0;
  background:
    radial-gradient(56% 60% at 88% 0%, rgba(154, 107, 255, 0.12), transparent 62%),
    var(--ink);
}

.page-about .about-partners__head {
  max-width: 58ch;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-partners__title {
  margin-top: 10px;
  color: var(--paper);
}

.page-about .about-partners__lead {
  margin-top: 14px;
  color: rgba(245, 241, 230, 0.74);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 22px);
}

.page-about .partner {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(28, 81, 67, 0.7), rgba(10, 36, 31, 0.92));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .partner:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
}

.page-about .partner__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .partner__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .partner__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 241, 230, 0.72);
}

/* ---------- 信条 ---------- */
.page-about .about-creed {
  padding: clamp(50px, 7vw, 100px) 0;
  background:
    radial-gradient(58% 62% at 6% 100%, rgba(201, 162, 74, 0.14), transparent 62%),
    var(--ink-2);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-creed__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

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

.page-about .about-creed__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
}

.page-about .about-creed__title {
  margin-top: 10px;
  color: var(--paper);
}

.page-about .creed {
  list-style: none;
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  padding: 0;
}

.page-about .creed__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 20px);
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .creed__item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .creed__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .creed__name {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .creed__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 241, 230, 0.72);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 78px) 0 clamp(54px, 8vw, 96px);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  align-items: end;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta__desc {
  margin: 14px 0 0;
  max-width: 62ch;
  color: rgba(245, 241, 230, 0.74);
}

.page-about .about-cta__actions {
  gap: 10px;
}

.page-about .about-cta__actions .ky-btn {
  justify-content: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .tl__item {
    display: grid;
    grid-template-columns: minmax(88px, 132px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    align-items: start;
  }

  .page-about .tl__year {
    padding-top: 2px;
  }

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

@media (min-width: 880px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }

  .page-about .about-creed__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 26px);
  }

  .page-about .flow__step::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(-1 * clamp(14px, 2vw, 26px));
    width: clamp(14px, 2vw, 26px);
    border-top: 1px dashed var(--about-gold-deep);
    opacity: 0.55;
  }

  .page-about .flow__step:last-child::after {
    display: none;
  }
}

@media (hover: none) {
  .page-about .tl__more {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
    padding-left: 12px;
    border-left-color: var(--gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__step,
  .page-about .partner,
  .page-about .team-legend__item,
  .page-about .tl__more,
  .page-about .tl__item::before {
    transition: none;
  }

  .page-about .flow__step:hover,
  .page-about .flow__step:focus-visible,
  .page-about .partner:hover,
  .page-about .team-legend__item:hover {
    transform: none;
  }
}