.page-about {
  --about-rail-w: 190px;
  --about-rail-gap: 48px;
  --about-line: rgba(212, 166, 74, 0.28);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(212, 166, 74, 0.16), transparent 62%),
    linear-gradient(160deg, #121212 0%, #1B2A41 100%);
  color: #FAF7F1;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  mix-blend-mode: luminosity;
  pointer-events: none;
}

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

.page-about .about-hero .sj-breadcrumb {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(2rem, 6.4vw, 3.2rem);
  line-height: 1.16;
  letter-spacing: -0.012em;
  font-weight: 900;
  max-width: 20em;
  text-shadow: 0 1px 0 rgba(212, 166, 74, 0.28);
}

.page-about .about-hero__lead {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
  color: rgba(250, 247, 241, 0.82);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(30px, 5vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--sj-hairline, 1px solid rgba(212, 166, 74, 0.24));
  border: 1px solid rgba(212, 166, 74, 0.24);
  border-radius: var(--sj-radius-m, 16px);
  overflow: hidden;
}

.page-about .about-hero__stats li {
  background: rgba(18, 18, 18, 0.72);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 92px;
  justify-content: center;
}

.page-about .about-stat__num {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  color: var(--sj-gold, #D4A64A);
  -webkit-text-stroke: 0.5px rgba(232, 212, 168, 0.5);
  letter-spacing: -0.01em;
  line-height: 1;
}

.page-about .about-stat__label {
  font-size: 0.875rem;
  color: rgba(250, 247, 241, 0.66);
  line-height: 1.5;
}

.page-about .about-hero__actions {
  margin-top: clamp(26px, 4vw, 36px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: block;
  padding: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px);
}

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

.page-about .about-flow {
  display: grid;
  gap: clamp(48px, 7vw, 88px);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  scroll-margin-top: 90px;
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px 20px;
  align-items: start;
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-chapter__num {
  font-size: clamp(2.2rem, 7vw, 3.4rem);
  line-height: 0.9;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--sj-gold, #D4A64A);
  text-stroke: 1.4px var(--sj-gold, #D4A64A);
  display: block;
  padding-top: 2px;
}

.page-about .about-chapter__num--ink {
  -webkit-text-stroke: 1.4px #121212;
  text-stroke: 1.4px #121212;
}

.page-about .about-chapter__num--gold {
  -webkit-text-stroke: 1.4px #E8D4A8;
  text-stroke: 1.4px #E8D4A8;
}

.page-about .about-chapter__title {
  margin: 0;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__desc {
  margin: 12px 0 0;
  max-width: 58ch;
  line-height: 1.75;
  color: var(--sj-stone, #6E6A63);
}

.page-about .about-chapter--sand {
  background: var(--sj-sand, #F4EAD6);
  color: var(--sj-ink, #121212);
  border-radius: var(--sj-radius-l, 26px);
  padding: clamp(28px, 5vw, 52px);
  margin: 0 calc(-1 * clamp(0px, 2vw, 0px));
}

.page-about .about-chapter--sand .about-chapter__desc {
  color: rgba(18, 18, 18, 0.68);
}

.page-about .about-chapter--night {
  background:
    radial-gradient(700px 340px at 88% 0%, rgba(212, 166, 74, 0.14), transparent 60%),
    var(--sj-night, #1B2A41);
  color: #FAF7F1;
  border-radius: var(--sj-radius-l, 26px);
  padding: clamp(28px, 5vw, 52px);
}

.page-about .about-chapter--night .about-chapter__desc {
  color: rgba(250, 247, 241, 0.7);
}

/* ---------- 01 ---------- */
.page-about .about-01__grid {
  margin-bottom: clamp(30px, 5vw, 46px);
}

.page-about .about-01__card {
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-01__card p {
  margin: 0 0 12px;
  line-height: 1.78;
}

.page-about .about-01__card p:last-child {
  margin-bottom: 0;
}

.page-about .about-01__card--ink {
  background: var(--sj-ink, #121212);
  color: #FAF7F1;
  border-color: rgba(212, 166, 74, 0.3);
}

.page-about .about-01__card--ink .sj-card__title {
  color: #FAF7F1;
}

.page-about .about-01__card--ink .sj-muted {
  color: rgba(250, 247, 241, 0.6);
}

.page-about .about-01__lines {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-01__lines li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  line-height: 1.65;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(212, 166, 74, 0.18);
}

.page-about .about-01__lines li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-01__more {
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--sj-gold, #D4A64A);
  line-height: 1.75;
  color: rgba(18, 18, 18, 0.78);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin-top: clamp(34px, 5vw, 52px);
  padding-top: clamp(26px, 4vw, 38px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-timeline__title {
  margin: 0 0 clamp(22px, 3.4vw, 32px);
  font-size: clamp(1.1rem, 2.4vw, 1.3rem);
  font-weight: 700;
}

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

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 26px 30px;
  border-left: 1px solid var(--about-line);
}

.page-about .about-timeline__node:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline__node:last-child::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 12px;
  bottom: 0;
  width: 1px;
  background: var(--about-line);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sj-jade, #2E8B6E);
  box-shadow: 0 0 0 4px rgba(46, 139, 110, 0.14);
}

.page-about .about-timeline__dot--gold {
  background: var(--sj-gold, #D4A64A);
  box-shadow: 0 0 0 4px rgba(212, 166, 74, 0.18);
}

.page-about .about-timeline__time {
  margin: 0 0 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--sj-gold-deep, #8C6B1F);
  letter-spacing: 0.01em;
}

.page-about .about-timeline__label {
  margin: 0 0 8px;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .about-timeline__detail {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--sj-stone, #6E6A63);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.36s var(--sj-ease, ease), opacity 0.28s var(--sj-ease, ease);
}

.page-about .about-timeline__node:hover .about-timeline__detail,
.page-about .about-timeline__node:focus-within .about-timeline__detail {
  max-height: 12em;
  opacity: 1;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(28px, 4.5vw, 44px) 0 0;
}

/* ---------- 02 团队 ---------- */
.page-about .about-team .about-team__card {
  padding: clamp(20px, 3vw, 26px);
  display: flex;
  flex-direction: column;
}

.page-about .about-team .sj-card--gold .sj-card__title {
  color: var(--sj-ink, #121212);
}

.page-about .about-team__eyebrow--ink {
  color: var(--sj-gold-deep, #8C6B1F) !important;
}

.page-about .about-team__duty {
  margin: 4px 0 16px;
  font-weight: 600;
  line-height: 1.6;
}

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

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--sj-gold, #D4A64A);
}

.page-about .about-figure--team {
  margin-bottom: clamp(26px, 4vw, 38px);
}

.page-about .about-247 {
  margin-top: clamp(26px, 4vw, 38px);
  background: var(--sj-paper, #FAF7F1);
  border: 1px solid var(--about-line);
  border-radius: var(--sj-radius-m, 16px);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-247__title {
  margin: 0 0 16px;
  font-size: 1.0625rem;
  font-weight: 800;
}

.page-about .about-247__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-247__list li {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(212, 166, 74, 0.34);
  line-height: 1.7;
}

.page-about .about-247__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-247__k {
  font-size: 0.9375rem;
  color: var(--sj-gold-deep, #8C6B1F);
  font-weight: 700;
}

/* ---------- 03 节奏表 ---------- */
.page-about .about-schedule {
  border-radius: var(--sj-radius-m, 16px);
  overflow: hidden;
}

.page-about .about-schedule__cap {
  padding: 0 0 14px;
  text-align: left;
  font-size: 0.875rem;
  color: var(--sj-stone, #6E6A63);
  caption-side: top;
}

.page-about .about-schedule .sj-table td.sj-mono,
.page-about .about-schedule .sj-table th.sj-mono {
  color: var(--sj-gold-deep, #8C6B1F);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-03__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  line-height: 1.75;
  color: var(--sj-stone, #6E6A63);
}

/* ---------- 04 合作 ---------- */
.page-about .about-partner__card {
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-partner__num {
  margin: 0 0 6px;
  font-size: clamp(2.2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--sj-gold-deep, #8C6B1F);
  -webkit-text-stroke: 0.6px rgba(140, 107, 31, 0.4);
}

.page-about .about-partner__card--ghost {
  background: transparent;
  border: 1px solid rgba(212, 166, 74, 0.34);
  color: #FAF7F1;
}

.page-about .about-partner__card--ghost .sj-card__title {
  color: #FAF7F1;
}

.page-about .about-partner__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-partner__list li {
  display: grid;
  gap: 6px;
  line-height: 1.72;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(212, 166, 74, 0.2);
}

.page-about .about-partner__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-partner__list strong {
  color: var(--sj-gold, #D4A64A);
  font-weight: 700;
}

.page-about .about-partner__list span {
  color: rgba(250, 247, 241, 0.76);
  font-size: 0.9375rem;
}

.page-about .about-partner__card--wide {
  background: rgba(250, 247, 241, 0.05);
  border: 1px solid rgba(212, 166, 74, 0.24);
  color: #FAF7F1;
}

.page-about .about-partner__card--wide .sj-card__title {
  color: #FAF7F1;
}

.page-about .about-partner__split {
  display: grid;
  gap: 14px;
}

.page-about .about-partner__split p {
  margin: 0;
  line-height: 1.78;
  color: rgba(250, 247, 241, 0.76);
  font-size: 0.9375rem;
}

.page-about .about-partner__split b {
  color: var(--sj-gold, #D4A64A);
  font-weight: 700;
}

.page-about .about-partner__split a,
.page-about .about-partner__card--wide a {
  color: var(--sj-gold, #D4A64A);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 05 取舍 ---------- */
.page-about .about-values {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-values__item {
  border-top: 2px solid var(--sj-ink, #121212);
  padding-top: 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-values__idx {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--sj-gold-deep, #8C6B1F);
  letter-spacing: 0.06em;
}

.page-about .about-values__title {
  margin: 0;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 800;
  line-height: 1.4;
}

.page-about .about-values__item p {
  margin: 0;
  max-width: 60ch;
  line-height: 1.78;
  color: var(--sj-stone, #6E6A63);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 5vw, 48px);
  padding: clamp(24px, 4vw, 36px);
  border-radius: var(--sj-radius-l, 26px);
  display: grid;
  gap: 20px;
  color: var(--sj-ink, #121212);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(1.15rem, 2.6vw, 1.4rem);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 52ch;
  line-height: 1.75;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 链接通用 ---------- */
.page-about .about-flow a:not(.sj-btn) {
  color: var(--sj-gold-deep, #8C6B1F);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-chapter--night .about-flow a:not(.sj-btn),
.page-about .about-chapter--night a:not(.sj-btn) {
  color: var(--sj-gold, #D4A64A);
}

/* ---------- 动效 ---------- */
.page-about .sj-reveal[data-reveal] {
  opacity: 1;
  transform: none;
}

.page-about.sj-js .page-about .sj-reveal[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--sj-ease, ease), transform 0.5s var(--sj-ease, ease);
}

.page-about.sj-js .page-about .sj-reveal[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about.sj-js .page-about .sj-reveal[data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .about-timeline__detail {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 26px;
  }

  .page-about .about-timeline__node {
    padding-bottom: 32px;
  }

  .page-about .about-247__list li {
    grid-template-columns: 78px 1fr;
  }

  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .page-about .about-partner__split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

/* ---------- 桌面：左侧编号栏 ---------- */
@media (min-width: 1080px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: var(--about-rail-gap);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-rail__label {
    margin: 0 0 14px;
    font-size: 0.75rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--sj-stone, #6E6A63);
  }

  .page-about .about-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 4px;
    border-left: 1px solid rgba(212, 166, 74, 0.3);
  }

  .page-about .about-rail__list li {
    margin: 0;
  }

  .page-about .about-rail__list a {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 8px;
    align-items: baseline;
    padding: 9px 10px;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--sj-stone, #6E6A63);
    text-decoration: none;
    border-left: 2px solid transparent;
    margin-left: -1px;
    transition: color 0.2s var(--sj-ease, ease), border-color 0.2s var(--sj-ease, ease),
      background-color 0.2s var(--sj-ease, ease);
  }

  .page-about .about-rail__list a .sj-mono {
    color: var(--sj-gold-deep, #8C6B1F);
    font-size: 0.8125rem;
    font-weight: 700;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    color: var(--sj-ink, #121212);
    background: rgba(212, 166, 74, 0.1);
    outline: none;
  }

  .page-about .about-rail__list a[aria-current="true"] {
    color: var(--sj-ink, #121212);
    font-weight: 600;
    background: rgba(212, 166, 74, 0.14);
    border-left-color: var(--sj-gold, #D4A64A);
  }

  .page-about .about-timeline__track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    column-gap: 0;
    row-gap: 0;
  }

  .page-about .about-timeline__track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 11px;
    height: 1px;
    background: var(--about-line);
  }

  .page-about .about-timeline__node {
    padding: 34px 18px 0 0;
    border-left: 0;
  }

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

  .page-about .about-timeline__dot {
    left: 0;
    top: 6px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-timeline__detail {
    max-height: 0;
  }

  .page-about .about-timeline__node:hover .about-timeline__detail,
  .page-about .about-timeline__node:focus-within .about-timeline__detail {
    max-height: 14em;
  }

  .page-about .about-chapter--sand,
  .page-about .about-chapter--night {
    padding: clamp(34px, 3.4vw, 56px);
  }

  .page-about .about-hero__title {
    letter-spacing: -0.016em;
  }
}

@media (min-width: 1280px) {
  .page-about {
    --about-rail-w: 210px;
    --about-rail-gap: 64px;
  }
}

/* 防止窄屏横向溢出 */
@media (max-width: 420px) {
  .page-about .about-chapter__head {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .page-about .about-chapter__num {
    font-size: 2.2rem;
  }

  .page-about .about-247__list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-about .about-hero__actions .sj-btn,
  .page-about .about-cta__actions .sj-btn {
    width: 100%;
    justify-content: center;
  }
}