/* ==========================================================
   品牌价值页 /values/  —  作用域 .page-about
   ========================================================== */

.page-about {
  --about-rail: 216px;
  --about-sheet-shadow: 7px 7px 0 -1px rgba(3, 18, 14, .9), 7px 7px 0 0 rgba(0, 229, 199, .16);
  background: var(--c-ink);
  color: var(--c-paper);
  overflow-x: hidden;
}

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 42px) 0 clamp(40px, 5.5vw, 78px);
  border-bottom: var(--line-soft);
  background:
    radial-gradient(120% 92% at 90% 0%, rgba(27, 31, 75, .72) 0%, rgba(7, 28, 22, 0) 62%),
    linear-gradient(180deg, #071C16 0%, #061A14 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -34%;
  right: -22%;
  width: min(78vw, 820px);
  height: 172%;
  transform: rotate(-12deg);
  clip-path: polygon(22% 0, 100% 0, 78% 100%, 0 100%);
  background: linear-gradient(205deg, rgba(91, 31, 51, .62) 0%, rgba(27, 31, 75, .74) 100%);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  margin-top: clamp(24px, 3.5vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-l);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(240px, .68fr);
    align-items: start;
    gap: clamp(32px, 4vw, 64px);
  }
}

.page-about .about-hero__title {
  margin: 0 0 var(--gap-m);
  max-width: min(100%, 12em);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 56px);
  line-height: 1.07;
  letter-spacing: -.022em;
  color: var(--c-paper);
}

.page-about .about-hero__act {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--gap-m);
}

/* 首屏速览：错位叠放的纸张卡片 */
.page-about .about-hero__aside {
  display: grid;
  align-content: start;
  gap: 12px;
}

.page-about .about-hero__sheet {
  position: relative;
  padding: 15px 18px;
  background: rgba(13, 46, 36, .84);
  border: 1px solid rgba(154, 181, 170, .24);
  border-radius: var(--radius-s);
  box-shadow: var(--about-sheet-shadow);
  transition: transform .22s ease, border-color .22s ease;
}

.page-about .about-hero__sheet:nth-child(2) {
  transform: translateX(10px);
}

.page-about .about-hero__sheet:nth-child(3) {
  transform: translateX(20px);
}

.page-about .about-hero__sheet:hover {
  border-color: rgba(0, 229, 199, .5);
}

@media (max-width: 899px) {
  .page-about .about-hero__sheet:nth-child(2),
  .page-about .about-hero__sheet:nth-child(3) {
    transform: none;
  }
}

.page-about .about-hero__sheet-k {
  margin: 0 0 6px;
  padding-left: 10px;
  border-left: 3px solid var(--c-amber);
  font-family: var(--font-note);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-mute);
}

.page-about .about-hero__sheet-v {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-paper);
}

/* ---------------- 正文骨架：目录 + 主栏 ---------------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(44px, 6vw, 84px);
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 80px);
    align-items: start;
  }
}

/* 章节目录 */
.page-about .about-toc {
  padding: 18px 14px;
  background: rgba(13, 46, 36, .55);
  border: 1px solid rgba(154, 181, 170, .2);
  border-left: 3px solid var(--c-neon);
  border-radius: var(--radius-s);
}

@media (min-width: 960px) {
  .page-about .about-toc {
    position: sticky;
    top: calc(var(--head-h) + 20px);
  }
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  padding-left: 8px;
  font-family: var(--font-note);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-about .about-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: about-toc;
  display: grid;
  gap: 2px;
}

.page-about .about-toc__list li {
  counter-increment: about-toc;
}

.page-about .about-toc__list a {
  display: flex;
  gap: 10px;
  padding: 8px 8px 8px 6px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-s);
  color: var(--c-paper);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.page-about .about-toc__list a::before {
  content: counter(about-toc, decimal-leading-zero);
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-mute);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  background: rgba(0, 229, 199, .1);
  border-left-color: var(--c-neon);
  color: var(--c-neon-soft);
  outline: none;
}

/* ---------------- 章节 ---------------- */
.page-about .about-main {
  min-width: 0;
}

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

.page-about .about-sec + .about-sec {
  margin-top: clamp(44px, 6.5vw, 88px);
  padding-top: clamp(32px, 4.5vw, 56px);
  border-top: var(--line-soft);
}

.page-about .about-sec__title {
  margin: 0 0 var(--gap-m);
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.3vw, 36px);
  line-height: 1.16;
  letter-spacing: -.016em;
  color: var(--c-paper);
}

.page-about .about-sec__intro {
  margin: 0 0 var(--gap-m);
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 247, 244, .84);
}

/* 正文段 */
.page-about .prose p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 247, 244, .88);
}

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

/* 图像 */
.page-about .about-figure {
  margin: var(--gap-m) 0;
}

.page-about .about-split .about-figure {
  margin: 0;
}

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

/* 左右并排 */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-m);
  margin-bottom: var(--gap-m);
}

@media (min-width: 780px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-split--flip > .about-figure {
    order: 2;
  }
}

/* ---------------- 时间轴 ---------------- */
.page-about .about-timeline {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 28px;
  padding-bottom: 16px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 18px;
  bottom: -2px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 138, 61, .6), rgba(255, 138, 61, .08));
}

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

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 10px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-amber);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .12);
}

.page-about .about-timeline__box {
  padding: 14px 16px;
  background: rgba(13, 46, 36, .64);
  border: 1px solid rgba(154, 181, 170, .2);
  border-radius: var(--radius-s);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-about .about-timeline__box:hover {
  border-color: rgba(0, 229, 199, .38);
}

.page-about .about-timeline__box[open] {
  background: rgba(13, 46, 36, .88);
  border-color: rgba(0, 229, 199, .32);
}

.page-about .about-timeline__box summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-timeline__box summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--c-mute);
}

.page-about .about-timeline__box[open] summary::after {
  content: "−";
  color: var(--c-neon);
}

.page-about .about-timeline__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.page-about .about-timeline__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: var(--line-soft);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 247, 244, .82);
}

/* ---------------- 团队 ---------------- */
.page-about .about-team {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-s);
}

@media (min-width: 640px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__item {
  padding: 18px 16px;
  background: var(--c-turf);
  border: 1px solid rgba(154, 181, 170, .18);
  border-top: 3px solid var(--c-amber);
  border-radius: var(--radius-s);
  transition: transform .22s ease, border-top-color .22s ease;
}

.page-about .about-team__item:hover {
  transform: translateY(-3px);
  border-top-color: var(--c-neon);
}

.page-about .about-team__num {
  display: block;
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-paper);
}

.page-about .about-team__num small {
  margin-left: 4px;
  font-size: 14px;
  font-weight: 400;
  color: var(--c-mute);
}

.page-about .about-team__name {
  margin: 12px 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mute);
}

.page-about .about-team__ver {
  display: inline-block;
  margin-top: 14px;
  padding: 3px 8px;
  border: 1px solid rgba(0, 229, 199, .36);
  border-radius: var(--radius-s);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .02em;
  color: var(--c-neon);
  opacity: .72;
  transition: opacity .2s ease, border-color .2s ease;
}

.page-about .about-team__item:hover .about-team__ver {
  opacity: 1;
  border-color: var(--c-neon);
}

/* ---------------- 多屏同看 ---------------- */
.page-about .about-sync {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 700px) {
  .page-about .about-sync {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-sync li {
  position: relative;
  padding: 13px 16px 13px 40px;
  background: rgba(27, 31, 75, .5);
  border: 1px solid rgba(0, 229, 199, .18);
  border-radius: var(--radius-s);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 247, 244, .88);
}

.page-about .about-sync li::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  background: var(--c-neon);
  transform: rotate(45deg);
}

/* ---------------- 分类标签与更新节奏 ---------------- */
.page-about .about-tags {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tags .tag {
  padding: 6px 13px;
  font-size: 13px;
  letter-spacing: .02em;
}

.page-about .about-cadence {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(154, 181, 170, .16);
  border: 1px solid rgba(154, 181, 170, .16);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .about-cadence__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 16px;
  background: rgba(13, 46, 36, .88);
}

.page-about .about-cadence dt {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--c-mute);
}

.page-about .about-cadence dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--c-paper);
}

/* ---------------- 服务范围数字 ---------------- */
.page-about .about-stats {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(154, 181, 170, .16);
  border: 1px solid rgba(154, 181, 170, .16);
  border-radius: var(--radius-s);
  overflow: hidden;
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-stats__item {
  padding: 18px 16px;
  background: rgba(13, 46, 36, .9);
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-mute);
}

/* ---------------- 结尾行动区 ---------------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin: 0 0 clamp(44px, 6vw, 92px);
  padding: clamp(28px, 4vw, 48px);
  background: linear-gradient(120deg, rgba(27, 31, 75, .92) 0%, rgba(13, 46, 36, .94) 58%, rgba(91, 31, 51, .88) 100%);
  border: 1px solid rgba(0, 229, 199, .28);
  border-radius: var(--radius-m);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -50px;
  top: -70px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(0, 229, 199, .2), transparent 70%);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  margin: 0 0 14px;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.18;
  letter-spacing: -.016em;
  color: var(--c-paper);
}

.page-about .about-cta__text {
  position: relative;
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 247, 244, .86);
}

.page-about .about-cta__act {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--gap-m);
}

/* ---------------- 窄屏兜底 ---------------- */
@media (max-width: 420px) {
  .page-about .about-hero__sheet {
    box-shadow: 4px 4px 0 -1px rgba(3, 18, 14, .9), 4px 4px 0 0 rgba(0, 229, 199, .16);
  }

  .page-about .about-timeline__box {
    padding: 12px 13px;
  }

  .page-about .about-timeline__name {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__sheet,
  .page-about .about-team__item,
  .page-about .about-team__ver,
  .page-about .about-toc__list a {
    transition: none;
  }
}