/* ================= 品牌总览 / page-about ================= */

.page-about {
  --about-idx: 190px;
  --about-line: rgba(42, 33, 24, 0.16);
  --about-card: #EDE6D6;
  --about-body: #4A4034;
  --about-dim: #8A8577;
  background: var(--paper);
  color: var(--brown);
  font-family: var(--font-mono);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-0);
  color: var(--paper);
  padding: clamp(18px, 3.4vw, 34px) 0 clamp(36px, 6vw, 80px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.3;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -25%;
  right: -12%;
  width: 58%;
  height: 150%;
  background: var(--grad);
  opacity: 0.13;
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero .lx-breadcrumb {
  position: relative;
  z-index: 1;
  color: var(--about-dim);
  font-size: 12px;
  margin-bottom: clamp(20px, 4vw, 42px);
}

.page-about .about-hero .lx-breadcrumb__link {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .about-hero .lx-breadcrumb__link:hover {
  color: var(--orange);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-hero__accent {
  display: inline-block;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-right: 0.06em;
}

.page-about .about-hero__lead {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.85;
  color: #C9C3B6;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(20px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  background: var(--ink-1);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__facts li:nth-child(2) .about-hero__num { color: var(--violet); }
.page-about .about-hero__facts li:nth-child(3) .about-hero__num { color: var(--orange); }
.page-about .about-hero__facts li:nth-child(4) .about-hero__num { color: var(--paper); }

.page-about .about-hero__lbl {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--about-dim);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad);
  opacity: 0.16;
  mix-blend-mode: screen;
  pointer-events: none;
}

/* ---------- 主体骨架：索引 + 章节流 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 40px);
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(36px, 6vw, 80px);
}

.page-about .about-index {
  align-self: start;
  min-width: 0;
}

.page-about .about-index__head {
  margin: 0 0 10px;
  padding-bottom: 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--about-dim);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--brown);
  text-decoration: none;
  background: var(--about-card);
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--violet);
  border-bottom-color: var(--orange);
}

.page-about .about-index__no {
  font-size: 11px;
  color: var(--about-dim);
  font-variant-numeric: tabular-nums;
}

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

/* ---------- 章节通用 ---------- */

.page-about .about-section {
  padding-bottom: clamp(26px, 4.4vw, 54px);
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--about-line);
  padding-top: clamp(26px, 4.4vw, 54px);
}

.page-about .about-section__head {
  margin-bottom: clamp(16px, 2.8vw, 28px);
}

.page-about .about-section__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  margin-bottom: 8px;
}

.page-about .about-section__title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--brown);
  margin: 0;
}

.page-about .about-section__title::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  margin-top: 12px;
  background: var(--grad);
  transform: skewX(-24deg);
}

.page-about .about-section__note {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--about-dim);
}

.page-about .about-p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-note {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--paper-2);
  font-size: 13px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-link {
  color: var(--violet);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link:hover {
  color: var(--red);
}

/* ---------- 01 谁在用 ---------- */

.page-about .about-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-card {
  position: relative;
  padding: clamp(18px, 2.6vw, 24px) clamp(16px, 2.4vw, 24px) clamp(24px, 3.4vw, 32px);
  background: var(--about-card);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 3px;
  background: var(--cyan);
}

.page-about .about-card:nth-child(2)::before { background: var(--violet); }
.page-about .about-card:nth-child(3)::before { background: var(--orange); }

.page-about .about-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-about .about-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 02 数据范围 ---------- */

.page-about .about-data {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 36px);
}

.page-about .about-metrics {
  list-style: none;
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.page-about .about-metrics li {
  background: var(--ink-0);
  color: var(--paper);
  padding: 12px 12px 14px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-about .about-metrics strong {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(17px, 2.6vw, 24px);
  line-height: 1.1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metrics span {
  display: block;
  margin-top: 5px;
  font-size: 11px;
  line-height: 1.5;
  color: #9FA8AE;
}

.page-about .about-scope {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 5px;
  max-width: 300px;
}

.page-about .about-scope__cell {
  aspect-ratio: 1 / 1;
  background: rgba(42, 33, 24, 0.06);
  border: 1px solid rgba(42, 33, 24, 0.22);
}

.page-about .about-scope__cell:nth-child(3n + 1) {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-scope__cell:nth-child(5n + 2) {
  background: var(--violet);
  border-color: var(--violet);
}

.page-about .about-scope__cell:nth-child(11n + 7) {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-scope__cap {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--about-dim);
}

/* ---------- 03 版本演进 ---------- */

.page-about .about-figure {
  margin: 0 0 clamp(18px, 3vw, 28px);
  overflow: hidden;
  border: 1px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-figure__cap {
  padding: 10px 14px;
  background: var(--ink-1);
  color: #B9B2A3;
  font-size: 12px;
  line-height: 1.6;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--red) 0%, var(--violet) 55%, var(--cyan) 100%);
  opacity: 0.5;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 12px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 16px;
  width: 10px;
  height: 10px;
  background: var(--red);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .about-ver__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 16px;
  background: var(--about-card);
  cursor: pointer;
  list-style: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background 180ms ease;
}

.page-about .about-ver__sum::-webkit-details-marker { display: none; }
.page-about .about-ver__sum::marker { content: ""; }

.page-about .about-ver__sum:hover {
  background: var(--paper-2);
}

.page-about .about-ver__no {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 18px;
  line-height: 1.2;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-ver__name {
  font-size: 14px;
  line-height: 1.4;
  color: var(--brown);
}

.page-about .about-ver__chev {
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--about-dim);
  border-bottom: 2px solid var(--about-dim);
  transform: rotate(45deg);
  transition: transform 200ms ease, border-color 200ms ease;
}

.page-about .about-ver[open] .about-ver__sum {
  background: var(--brown);
}

.page-about .about-ver[open] .about-ver__no { color: var(--orange); }
.page-about .about-ver[open] .about-ver__name { color: var(--paper); }

.page-about .about-ver[open] .about-ver__chev {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-about .about-ver__body {
  padding: 12px 16px 6px;
  border-left: 2px solid var(--paper-2);
  margin-top: 2px;
}

.page-about .about-ver__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 04 资料对比（深色面板） ---------- */

.page-about .about-dark {
  position: relative;
  background: var(--ink-0);
  color: var(--paper);
  padding: clamp(20px, 3.4vw, 36px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-archive__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-bottom: clamp(14px, 2.4vw, 22px);
  margin-bottom: clamp(16px, 2.6vw, 24px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-archive__num {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(22px, 3.8vw, 36px);
  line-height: 1.05;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-archive__stat:nth-child(2) .about-archive__num { color: var(--violet); }
.page-about .about-archive__stat:nth-child(3) .about-archive__num { color: var(--orange); }

.page-about .about-archive__lbl {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  line-height: 1.5;
  color: #8A8577;
}

.page-about .about-archive__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: #C6C0B2;
}

.page-about .about-archive__body .lx-btn {
  margin-top: 8px;
}

/* ---------- 05 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-team__media {
  margin: 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__list {
  list-style: none;
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 30px;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__label {
  font-size: 12px;
  color: var(--brown);
  white-space: nowrap;
}

.page-about .about-team__track {
  display: block;
  height: 9px;
  background: var(--paper-2);
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  background: var(--grad);
}

.page-about .about-team__row:nth-child(1) .about-team__fill { width: 38%; }
.page-about .about-team__row:nth-child(2) .about-team__fill { width: 35%; }
.page-about .about-team__row:nth-child(3) .about-team__fill { width: 18%; }
.page-about .about-team__row:nth-child(4) .about-team__fill { width: 9%; }

.page-about .about-team__num {
  text-align: right;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 15px;
  color: var(--violet);
  font-variant-numeric: tabular-nums;
}

/* ---------- 06 认证与生态 ---------- */

.page-about .about-trust {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-trust__item {
  padding: 16px 16px 18px;
  background: rgba(42, 33, 24, 0.035);
  border-top: 2px solid var(--brown);
}

.page-about .about-trust__item:nth-child(1) { border-top-color: var(--cyan); }
.page-about .about-trust__item:nth-child(2) { border-top-color: var(--violet); }
.page-about .about-trust__item:nth-child(3) { border-top-color: var(--orange); }
.page-about .about-trust__item:nth-child(4) { border-top-color: var(--red); }

.page-about .about-trust__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 16px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-about .about-trust__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 07 下一步 ---------- */

.page-about .about-road {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-road__item {
  position: relative;
  padding: clamp(18px, 2.6vw, 24px) clamp(16px, 2.4vw, 24px) clamp(22px, 3.2vw, 30px);
  background: var(--about-card);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-road__no {
  display: inline-block;
  padding: 2px 9px;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 13px;
  color: var(--paper);
  background: var(--violet);
  transform: skewX(-8deg);
}

.page-about .about-road__item:nth-child(2) .about-road__no { background: var(--cyan); color: var(--ink-0); }
.page-about .about-road__item:nth-child(3) .about-road__no { background: var(--orange); }

.page-about .about-road__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.3;
  color: var(--brown);
}

.page-about .about-road__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--ink-0);
  color: var(--paper);
  padding: clamp(36px, 6vw, 76px) 0;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -70%;
  width: 68%;
  height: 170%;
  background: var(--grad);
  opacity: 0.14;
  transform: skewX(-16deg);
  pointer-events: none;
}

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

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(28px, 5.4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.85;
  color: #C9C3B6;
}

.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3.4vw, 30px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-data {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

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

  .page-about .about-body {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    width: 100%;
    padding: 9px 0;
    background: transparent;
    border-bottom: 1px solid var(--about-line);
    transition: color 160ms ease, padding-left 160ms ease, border-color 160ms ease;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    padding-left: 6px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-trust {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .about-metrics {
    grid-template-columns: 1fr;
  }

  .page-about .about-archive__stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-about .about-team__row {
    grid-template-columns: 68px minmax(0, 1fr) 26px;
    gap: 8px;
  }

  .page-about .about-scope {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-ver__sum,
  .page-about .about-ver__chev {
    transition: none;
  }
}