.page-about {
  --about-line: #E6D9C6;
  --about-idx: 176px;
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 3vw, 36px) 0 clamp(40px, 6vw, 76px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-hero-copy .eyebrow {
  align-self: flex-start;
  margin: 0;
}

.page-about .about-hero-copy .display {
  margin: 0;
  color: var(--brown);
  max-width: 17ch;
}

.page-about .about-hero-copy .lede {
  margin: 0;
  max-width: 56ch;
  color: var(--ink);
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero-facts li {
  padding: 7px 15px;
  border-radius: var(--pill);
  border: 1px solid rgba(201, 162, 39, .55);
  background: rgba(201, 162, 39, .09);
  color: var(--brown);
  font-size: 14px;
  line-height: 1.4;
}

.page-about .about-hero-actions {
  margin-top: 4px;
}

.page-about .about-hero-shot {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2);
}

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-hero-shot {
    transform: translateY(14px);
  }
}

/* ---------- 分栏主体 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-index {
  display: none;
}

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

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-index {
    display: block;
    position: sticky;
    top: 40px;
  }
}

.page-about .about-index-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--about-line);
}

.page-about .about-index-list a {
  display: block;
  padding: 9px 0 9px 16px;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.45;
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  color: var(--orange);
  border-left-color: var(--orange);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-top: clamp(40px, 6vw, 68px);
}

.page-about .about-chapter:first-child {
  padding-top: 0;
}

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

.page-about .about-chapter > .eyebrow,
.page-about .about-chapter > .eyebrow--ink {
  margin: 0 0 12px;
}

.page-about .about-chapter > .h2 {
  margin: 0 0 20px;
  max-width: 24ch;
  color: var(--brown);
}

.page-about .about-prose {
  margin: 0 0 18px;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

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

/* ---------- 三类用户 ---------- */
.page-about .about-persona-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-persona-list li {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 22px;
  background: var(--card);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-persona-list li:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2);
}

.page-about .about-persona-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-persona-list h3 {
  margin: 0;
  color: var(--brown);
}

.page-about .about-persona-list p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

@media (min-width: 760px) {
  .page-about .about-persona-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 深色原则面板 ---------- */
.page-about .about-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  padding: clamp(30px, 5vw, 60px);
  background: var(--ink);
  color: var(--mist);
}

.page-about .about-panel::after {
  content: "";
  position: absolute;
  top: -110px;
  right: -110px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(228, 87, 46, .36), rgba(228, 87, 46, 0) 70%);
  pointer-events: none;
}

.page-about .about-panel > .eyebrow {
  margin: 0 0 12px;
  position: relative;
  z-index: 1;
}

.page-about .about-panel > .h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 22ch;
  color: var(--card);
}

.page-about .about-principles {
  position: relative;
  z-index: 1;
  list-style: none;
  counter-reset: prin;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-principles li {
  position: relative;
  padding: 24px 0 24px 54px;
  border-top: 1px solid rgba(201, 162, 39, .34);
}

.page-about .about-principles li:last-child {
  border-bottom: 1px solid rgba(201, 162, 39, .34);
}

.page-about .about-principles li::before {
  counter-increment: prin;
  content: "0" counter(prin);
  position: absolute;
  left: 0;
  top: 26px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .about-principles h3 {
  margin: 0 0 8px;
  color: var(--card);
}

.page-about .about-principles p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(221, 231, 240, .86);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 32px 0 0;
  padding: 0 0 0 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, .16));
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 34px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--orange);
}

.page-about .about-tl-year {
  display: block;
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-tl-body h3 {
  margin: 0 0 6px;
  color: var(--brown);
}

.page-about .about-tl-body p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-tl-photo {
  position: relative;
  margin: 0 0 34px;
}

.page-about .about-tl-photo::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 10px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-tl-photo .media-frame {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

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

@media (hover: hover) and (pointer: fine) {
  .page-about .about-tl-item::before {
    transition: transform .24s var(--ease), background .24s var(--ease), border-color .24s var(--ease);
  }
  .page-about .about-tl-item .about-tl-body p {
    opacity: .7;
    transition: opacity .24s var(--ease);
  }
  .page-about .about-tl-item:hover::before,
  .page-about .about-tl-item:focus-within::before {
    transform: scale(1.16);
    background: var(--orange);
  }
  .page-about .about-tl-item:hover .about-tl-body p,
  .page-about .about-tl-item:focus-within .about-tl-body p {
    opacity: 1;
  }
}

/* ---------- 数字体量 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  background: var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 22px;
  background: var(--card);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.2vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-stat-label {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--brown);
}

.page-about .about-stat-note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
  opacity: .84;
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 合作伙伴 ---------- */
.page-about .about-partner-grid {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  align-items: center;
  margin-top: 26px;
}

.page-about .about-partner-tags {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-partner-tags li {
  padding: 8px 20px;
  border-radius: var(--pill);
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  transition: background .24s var(--ease), color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-partner-tags li:hover {
  background: var(--orange);
  color: var(--card);
  transform: translateY(-4px);
}

.page-about .about-partner-shot {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

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

@media (min-width: 860px) {
  .page-about .about-partner-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }
}

/* ---------- 认可 ---------- */
.page-about .about-awards {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-about .about-award {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 24px;
  background: var(--card);
  border: 1px solid rgba(201, 162, 39, .48);
  border-radius: var(--radius-lg);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-award:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2);
}

.page-about .about-award-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-award h3 {
  margin: 0;
  color: var(--brown);
}

.page-about .about-award p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink);
}

@media (min-width: 780px) {
  .page-about .about-awards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  padding: clamp(44px, 6vw, 78px) 0;
  background: var(--brown);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.page-about .about-outro-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about .about-outro .h2 {
  margin: 0;
  max-width: 22ch;
  color: var(--card);
}

.page-about .about-outro .lede {
  margin: 0;
  max-width: 58ch;
  color: rgba(221, 231, 240, .84);
}

.page-about .about-outro .btn--ghost {
  color: var(--card);
  border-color: rgba(251, 244, 233, .5);
}

.page-about .about-outro .btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-outro-actions {
  margin-top: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-persona-list li,
  .page-about .about-award,
  .page-about .about-partner-tags li,
  .page-about .about-hero-shot {
    transition: none;
    transform: none;
  }
}