/* ================= 平台发展历程 /history/ ================= */

.page-about {
  --about-ink-soft: rgba(27, 26, 25, .74);
  --about-ring: rgba(245, 135, 31, .18);

  font-family: var(--xy-font);
  color: var(--xy-ink);
  background: var(--xy-paper);
  line-height: 1.85;
}

.page-about .xy-section {
  padding-block: clamp(52px, 7vw, 104px);
}

/* ---------- 面包屑 ---------- */

.page-about .about-breadcrumb-wrap {
  padding-top: clamp(16px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(24px, 3.5vw, 44px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-hero__note {
  display: none;
  margin: 0;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--xy-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--xy-muted);
  padding-top: 8px;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(32px, 7.6vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-about .about-hero__accent {
  position: relative;
  color: var(--xy-orange);
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .08em;
  height: .14em;
  border-radius: var(--xy-r-pill);
  background: var(--xy-orange-soft);
  z-index: -1;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 56ch;
  font-size: clamp(15.5px, 1.9vw, 17px);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--xy-line-soft);
  border: 1px solid var(--xy-line-soft);
  border-radius: var(--xy-r-lg);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--xy-paper-light);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-facts__num {
  font-family: var(--xy-mono);
  font-size: clamp(18px, 4.6vw, 23px);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.2;
  color: var(--xy-orange);
}

.page-about .about-facts__item:nth-child(2) .about-facts__num { color: var(--xy-blue); }
.page-about .about-facts__item:nth-child(3) .about-facts__num { color: var(--xy-green); }
.page-about .about-facts__item:nth-child(4) .about-facts__num { color: var(--xy-red); }

.page-about .about-facts__label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--xy-muted);
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: 40px minmax(0, 1fr) 336px;
    align-items: start;
    gap: clamp(24px, 3vw, 48px);
  }

  .page-about .about-hero__note {
    display: block;
  }

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

/* ---------- 章节头 ---------- */

.page-about .about-head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
}

.page-about .about-kicker {
  margin: 0;
  font-family: var(--xy-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--xy-orange);
}

.page-about .about-h2 {
  margin: 0;
  font-size: clamp(25px, 4.2vw, 40px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.02em;
}

.page-about .about-lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-lede a {
  color: var(--xy-blue);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-lede a:hover {
  color: var(--xy-orange);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline__body {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  margin-top: clamp(28px, 4vw, 52px);
}

.page-about .about-timeline__figure {
  margin: 0;
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-xl);
  overflow: hidden;
  background: linear-gradient(160deg, var(--xy-orange-soft) 0%, var(--xy-paper-light) 58%, rgba(79, 163, 227, .24) 100%);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-timeline__caption {
  margin: 14px 2px 0;
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: .04em;
  color: var(--xy-muted);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 34px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--xy-orange) 0%, var(--xy-sky) 50%, var(--xy-green) 100%);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(22px, 3.4vw, 40px);
}

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

.page-about .about-node__dot {
  position: absolute;
  left: -31px;
  top: 7px;
  width: 16px;
  height: 16px;
  background: var(--xy-orange);
  border-radius: 50% 50% 50% 3px;
  box-shadow: 0 0 0 5px var(--xy-paper);
}

.page-about .about-node:nth-child(2) .about-node__dot { background: var(--xy-sky); }
.page-about .about-node:nth-child(3) .about-node__dot { background: var(--xy-blue); }
.page-about .about-node:nth-child(4) .about-node__dot { background: var(--xy-red); }
.page-about .about-node:nth-child(5) .about-node__dot { background: var(--xy-green); }

.page-about .about-node__when {
  margin: 0 0 6px;
  font-family: var(--xy-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--xy-blue);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
}

.page-about .about-node__lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-node__toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  margin-top: 12px;
  padding: 0 15px 0 18px;
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-pill);
  background: var(--xy-paper-light);
  color: var(--xy-ink);
  font-family: inherit;
  font-size: 13.5px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: border-color .22s var(--xy-ease), background-color .22s var(--xy-ease), color .22s var(--xy-ease);
}

.page-about .about-node__toggle:hover {
  border-color: var(--xy-orange);
  color: var(--xy-orange);
}

.page-about .about-node__toggle:focus-visible {
  outline: 2px solid var(--xy-sky);
  outline-offset: 2px;
}

.page-about .about-node__toggle[aria-expanded="true"] {
  background: var(--xy-orange);
  border-color: var(--xy-orange);
  color: #fff;
}

.page-about .about-node__sign {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--xy-orange);
  color: #fff;
  font-size: 14px;
  line-height: 1;
  transition: transform .22s var(--xy-ease), background-color .22s var(--xy-ease), color .22s var(--xy-ease);
}

.page-about .about-node__toggle[aria-expanded="true"] .about-node__sign {
  background: #fff;
  color: var(--xy-orange);
  transform: rotate(45deg);
}

.page-about .about-node__panel {
  margin-top: 14px;
  padding: 16px 18px;
  border: 1px solid var(--xy-line-soft);
  border-left: 3px solid var(--xy-orange);
  border-radius: var(--xy-r-md);
  background: var(--xy-paper-light);
}

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

.page-about .about-node__panel p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--about-ink-soft);
}

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

.page-about .about-node__panel strong {
  color: var(--xy-ink);
  font-weight: 800;
}

@media (min-width: 900px) {
  .page-about .about-timeline__body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-role {
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: var(--xy-r-md);
  transition: background-color .24s var(--xy-ease), border-color .24s var(--xy-ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  background: var(--xy-paper-light);
  border-color: var(--xy-line);
}

.page-about .about-role:focus-visible {
  outline: 2px solid var(--xy-sky);
  outline-offset: 2px;
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role__name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .about-role__num {
  font-family: var(--xy-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--xy-blue);
  line-height: 1;
}

.page-about .about-role:nth-child(2) .about-role__num { color: var(--xy-sky); }
.page-about .about-role:nth-child(3) .about-role__num { color: var(--xy-green); }

.page-about .about-role__num small {
  margin-left: 3px;
  font-size: 12px;
  font-weight: 500;
  color: var(--xy-muted);
}

.page-about .about-role__track {
  display: block;
  margin-top: 10px;
  height: 10px;
  border-radius: var(--xy-r-pill);
  background: rgba(31, 78, 156, .1);
  overflow: hidden;
}

.page-about .about-role__fill {
  display: block;
  width: var(--w, 0%);
  height: 100%;
  border-radius: var(--xy-r-pill);
  background: linear-gradient(90deg, var(--xy-orange), var(--xy-orange-soft));
  transition: box-shadow .24s var(--xy-ease);
}

.page-about .about-role:nth-child(2) .about-role__fill {
  background: linear-gradient(90deg, var(--xy-sky), rgba(79, 163, 227, .35));
}

.page-about .about-role:nth-child(3) .about-role__fill {
  background: linear-gradient(90deg, var(--xy-green), rgba(46, 139, 87, .35));
}

.page-about .about-role:hover .about-role__fill,
.page-about .about-role:focus-within .about-role__fill {
  box-shadow: 0 0 0 3px var(--about-ring);
}

.page-about .about-role__desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-lg);
  overflow: hidden;
  background: var(--xy-paper-light);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .about-role__desc {
    margin-top: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .34s var(--xy-ease), opacity .3s var(--xy-ease), margin-top .34s var(--xy-ease);
  }

  .page-about .about-role:hover .about-role__desc,
  .page-about .about-role:focus-within .about-role__desc {
    margin-top: 12px;
    max-height: 150px;
    opacity: 1;
  }
}

/* ---------- 资质与信息安全 ---------- */

.page-about .about-trust__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-trust__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-trust__item {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--xy-line-soft);
  border-radius: var(--xy-r-md);
  background: var(--xy-paper-light);
}

.page-about .about-trust__key {
  justify-self: start;
  display: inline-block;
  padding: 4px 13px;
  border-radius: var(--xy-r-pill);
  background: rgba(31, 78, 156, .1);
  color: var(--xy-blue);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
}

.page-about .about-trust__item:nth-child(2) .about-trust__key {
  background: rgba(200, 55, 45, .1);
  color: var(--xy-red);
}

.page-about .about-trust__item:nth-child(3) .about-trust__key {
  background: rgba(46, 139, 87, .12);
  color: var(--xy-green);
}

.page-about .about-trust__item:nth-child(5) .about-trust__key {
  background: rgba(245, 135, 31, .14);
  color: #a85a0c;
}

.page-about .about-trust__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

@media (min-width: 640px) {
  .page-about .about-trust__item {
    grid-template-columns: 124px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-trust__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }
}

/* ---------- 服务覆盖 ---------- */

.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-coverage__data .xy-filter {
  margin-bottom: 18px;
}

.page-about .about-cover__views {
  display: grid;
  gap: 18px;
}

.page-about .about-cover__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--xy-line-soft);
  border: 1px solid var(--xy-line-soft);
  border-radius: var(--xy-r-lg);
  overflow: hidden;
}

.page-about .about-cover__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 14px 18px;
  background: var(--xy-paper-light);
}

.page-about .about-cover__val {
  font-family: var(--xy-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.4;
  color: var(--xy-blue);
}

.page-about .about-cover__panel[data-tag="adapt"] .about-cover__val {
  color: var(--xy-green);
}

.page-about .about-cover__lbl {
  font-size: 14px;
  line-height: 1.6;
  color: var(--xy-muted);
}

.page-about .about-coverage__figure {
  margin: 0;
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-lg);
  overflow: hidden;
  background: linear-gradient(200deg, rgba(79, 163, 227, .26) 0%, var(--xy-paper-light) 55%, rgba(46, 139, 87, .22) 100%);
}

.page-about .about-coverage__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

@media (min-width: 900px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-cover__views {
    min-height: 268px;
  }
}

/* ---------- 出口 ---------- */

.page-about .about-next__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .about-next__card {
  position: relative;
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--xy-r-xl);
  text-decoration: none;
  transition: transform .26s var(--xy-ease), box-shadow .26s var(--xy-ease);
}

.page-about .about-next__card--orange {
  background: linear-gradient(140deg, var(--xy-orange) 0%, #f7a352 62%, var(--xy-orange-soft) 100%);
  border: 1px solid rgba(27, 26, 25, .12);
  color: #fff;
}

.page-about .about-next__card--ink {
  background: var(--xy-blue);
  border: 1px solid rgba(253, 249, 242, .22);
  color: var(--xy-paper-light);
}

.page-about .about-next__badge {
  justify-self: start;
  padding: 5px 13px;
  border: 1px solid currentColor;
  border-radius: var(--xy-r-pill);
  font-size: 12px;
  letter-spacing: .1em;
  opacity: .92;
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(19px, 2.7vw, 26px);
  font-weight: 900;
  line-height: 1.32;
  letter-spacing: -.01em;
}

.page-about .about-next__text {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.82;
  opacity: .9;
}

.page-about .about-next__go {
  font-family: var(--xy-mono);
  font-size: 20px;
  line-height: 1;
  transition: transform .26s var(--xy-ease);
}

.page-about .about-next__card:hover {
  transform: translateY(-4px);
}

.page-about .about-next__card--orange:hover {
  box-shadow: 0 0 0 3px rgba(245, 135, 31, .3);
}

.page-about .about-next__card--ink:hover {
  box-shadow: 0 0 0 3px rgba(31, 78, 156, .28);
}

.page-about .about-next__card:hover .about-next__go {
  transform: translateX(6px);
}

.page-about .about-next__card:focus-visible {
  outline: 2px solid var(--xy-sky);
  outline-offset: 4px;
}

.page-about .about-next__note {
  margin: clamp(20px, 3vw, 32px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--xy-muted);
}

@media (min-width: 780px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 入场动效 ---------- */

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    animation: about-rise .62s var(--xy-ease) both;
  }

  .page-about [data-reveal="0"] { animation-delay: 0ms; }
  .page-about [data-reveal="1"] { animation-delay: 90ms; }
  .page-about [data-reveal="2"] { animation-delay: 180ms; }
  .page-about [data-reveal="3"] { animation-delay: 270ms; }
  .page-about [data-reveal="4"] { animation-delay: 360ms; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

.page-about {
  --w: 1rem;
}