/* ===== 页面作用域：品牌轨迹 /profile/ ===== */
.page-about {
  --about-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --about-rail-w: 186px;
  position: relative;
  isolation: isolate;
  overflow-x: clip;
  background: var(--mg-deep);
  color: var(--mg-ink);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 59, 85, 0.20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 85, 0.20) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(ellipse 78% 58% at 80% 3%, #000 0%, transparent 72%);
  mask-image: radial-gradient(ellipse 78% 58% at 80% 3%, #000 0%, transparent 72%);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(28px, 4.5vw, 50px);
  border-bottom: 1px solid var(--mg-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -120px;
  width: min(680px, 92%);
  height: 470px;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(39, 232, 211, 0.30) 0%, rgba(255, 63, 164, 0.20) 52%, rgba(255, 200, 87, 0) 78%);
  clip-path: polygon(26% 0, 100% 0, 100% 74%, 58% 100%, 0 64%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -110px;
  bottom: -130px;
  width: 330px;
  height: 330px;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle, rgba(120, 144, 106, 0.22) 0%, rgba(120, 144, 106, 0) 70%);
}

.page-about .about-hero > .mg-container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .mg-breadcrumb {
  margin-bottom: 20px;
}

.page-about .about-hero .mg-kicker {
  color: var(--mg-cyan);
  letter-spacing: 0.2em;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 900px;
  font-family: var(--mg-font-display);
  font-weight: 800;
  font-size: clamp(29px, 6.2vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--mg-ink);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 720px;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.85;
  color: var(--mg-mist);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  background: var(--mg-line);
  border: 1px solid var(--mg-line);
}

.page-about .about-hero__facts > div {
  background: var(--mg-panel);
  padding: 14px 16px 16px;
}

.page-about .about-hero__facts dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mg-mist);
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-family: var(--mg-font-mono);
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--mg-ink);
}

.page-about .about-hero__facts > div:first-child dd {
  color: var(--mg-cyan);
}

.page-about .about-hero__facts > div:last-child dd {
  color: var(--mg-amber);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 36px;
}

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

/* ---------- 章节轨道 ---------- */
.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--mg-line);
  scrollbar-width: none;
}

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

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

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__list a {
  display: block;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid var(--mg-line);
  background: rgba(21, 31, 51, 0.7);
  color: var(--mg-mist);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--mg-cyan);
  border-color: var(--mg-cyan);
  background: rgba(39, 232, 211, 0.08);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 34px 0 8px;
  border-top: 1px solid var(--mg-line-soft);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .about-section__eyebrow {
  margin: 0 0 10px;
  font-family: var(--mg-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mg-cyan);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--about-serif);
  font-weight: 600;
  font-size: clamp(23px, 4.4vw, 35px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--mg-ink);
}

.page-about .about-section__title::after {
  content: "";
  display: block;
  width: 54px;
  height: 3px;
  margin-top: 15px;
  background: linear-gradient(90deg, var(--mg-clay), var(--mg-moss));
}

.page-about .about-section__lede {
  margin: 18px 0 0;
  max-width: 720px;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--mg-mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--mg-cyan) 0%, var(--mg-clay) 55%, var(--mg-moss) 100%);
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 30px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--mg-deep);
  border: 2px solid var(--mg-cyan);
  box-shadow: 0 0 0 4px rgba(39, 232, 211, 0.10);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__item:nth-child(3)::before {
  border-color: var(--mg-clay);
  box-shadow: 0 0 0 4px rgba(196, 107, 77, 0.12);
}

.page-about .about-timeline__item:nth-child(4)::before {
  border-color: var(--mg-moss);
  box-shadow: 0 0 0 4px rgba(120, 144, 106, 0.14);
}

.page-about .about-timeline__item:hover::before {
  box-shadow: 0 0 0 7px rgba(39, 232, 211, 0.14);
}

.page-about .about-timeline__stage {
  margin: 0 0 8px;
  font-family: var(--mg-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mg-amber);
}

.page-about .about-timeline__heading {
  margin: 0 0 8px;
  font-family: var(--mg-font-display);
  font-size: clamp(16px, 2.8vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--mg-ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 690px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mg-mist);
}

/* ---------- 媒体 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
  border: 1px solid var(--mg-line);
  background: var(--mg-panel);
  box-shadow: 0 22px 60px -46px rgba(39, 232, 211, 0.5);
}

.page-about .about-figure--flush {
  margin-top: 0;
}

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

.page-about .about-figure .mg-media__caption {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mg-mist);
  border-top: 1px solid var(--mg-line);
}

/* ---------- 三条主干 ---------- */
.page-about .about-threads {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-thread {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--mg-panel);
  border: 1px solid var(--mg-line);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-thread::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--about-accent, var(--mg-cyan));
}

.page-about .about-thread::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--about-glow, rgba(39, 232, 211, 0.12));
  pointer-events: none;
}

.page-about .about-thread--cyan {
  --about-accent: var(--mg-cyan);
  --about-glow: rgba(39, 232, 211, 0.14);
}

.page-about .about-thread--magenta {
  --about-accent: var(--mg-magenta);
  --about-glow: rgba(255, 63, 164, 0.14);
}

.page-about .about-thread--amber {
  --about-accent: var(--mg-amber);
  --about-glow: rgba(255, 200, 87, 0.14);
}

.page-about .about-thread:hover {
  transform: translateY(-2px);
  border-color: var(--about-accent);
}

.page-about .about-thread__num {
  position: relative;
  margin: 0;
  font-family: var(--mg-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--about-accent);
}

.page-about .about-thread__title {
  position: relative;
  margin: 10px 0 10px;
  font-family: var(--mg-font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mg-ink);
}

.page-about .about-thread__text {
  position: relative;
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mg-mist);
}

.page-about .about-thread__list {
  position: relative;
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-thread__list li {
  position: relative;
  padding-left: 15px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mg-ink);
}

.page-about .about-thread__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--about-accent);
}

/* ---------- 游戏矩阵 ---------- */
.page-about .about-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 28px;
  background: var(--mg-line);
  border: 1px solid var(--mg-line);
}

.page-about .about-matrix__cell {
  background: var(--mg-panel);
  padding: 20px 18px 22px;
}

.page-about .about-matrix__label {
  margin: 0 0 10px;
  font-family: var(--mg-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mg-moss);
}

.page-about .about-matrix__name {
  margin: 0 0 9px;
  font-family: var(--mg-font-display);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mg-ink);
}

.page-about .about-matrix__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mg-mist);
}

/* ---------- 包体区间条 ---------- */
.page-about .about-band {
  margin-top: 22px;
  padding: 20px 18px 18px;
  border: 1px solid var(--mg-line);
  background: linear-gradient(160deg, rgba(255, 200, 87, 0.07), rgba(21, 31, 51, 0.9));
}

.page-about .about-band__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 14px;
}

.page-about .about-band__end {
  font-family: var(--mg-font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--mg-amber);
}

.page-about .about-band__caption {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--mg-mist);
}

.page-about .about-band__track {
  position: relative;
  height: 8px;
  background: rgba(42, 59, 85, 0.9);
  border: 1px solid var(--mg-line);
  overflow: hidden;
}

.page-about .about-band__fill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--mg-cyan) 0%, var(--mg-moss) 48%, var(--mg-amber) 100%);
  opacity: 0.85;
}

.page-about .about-band__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mg-mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--mg-line-soft);
}

.page-about .about-roles li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--mg-line-soft);
}

.page-about .about-roles__k {
  font-family: var(--mg-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--mg-cyan);
}

.page-about .about-roles__v {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mg-ink);
}

.page-about .about-cadence {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence li {
  position: relative;
  padding: 14px 16px 14px 60px;
  background: var(--mg-panel);
  border: 1px solid var(--mg-line);
  border-left: 2px solid var(--mg-clay);
}

.page-about .about-cadence__tag {
  position: absolute;
  left: 14px;
  top: 16px;
  font-family: var(--mg-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mg-clay);
}

.page-about .about-cadence li p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mg-mist);
}

/* ---------- 服务规模 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--mg-line);
  border: 1px solid var(--mg-line);
}

.page-about .about-stats__cell {
  background: var(--mg-panel);
  padding: 20px 16px 22px;
}

.page-about .about-stats__num {
  margin: 0;
  font-family: var(--mg-font-mono);
  font-size: clamp(23px, 4.2vw, 31px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--mg-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__num--amber {
  color: var(--mg-amber);
}

.page-about .about-stats__label {
  margin: 9px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mg-mist);
}

/* ---------- 江苏站点 ---------- */
.page-about .about-site {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--mg-line-soft);
}

.page-about .about-facts > div {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--mg-line-soft);
}

.page-about .about-facts dt {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mg-mist);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mg-ink);
  word-break: break-word;
}

.page-about .about-facts__mono {
  font-family: var(--mg-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-about .about-site__note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--mg-line);
  background: rgba(120, 144, 106, 0.08);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mg-mist);
}

.page-about .about-site__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
}

.page-about .about-site__actions .mg-btn {
  flex: 0 1 auto;
}

/* ---------- 显现动效 ---------- */
.page-about .mg-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about .mg-reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .mg-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .about-thread {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-roles li {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-about .about-facts > div {
    grid-template-columns: 122px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-stats__cell {
    padding: 22px 20px 24px;
  }
}

@media (min-width: 760px) {
  .page-about .about-threads {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 桌面：侧边章节轨道 ---------- */
@media (min-width: 1000px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team,
  .page-about .about-site {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: 38px;
    align-items: start;
  }

  .page-about .about-site {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

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

@media (min-width: 1180px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 56px;
    margin-top: 54px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--mg-topbar-h) + 28px);
    overflow: visible;
    max-height: calc(100vh - var(--mg-topbar-h) - 56px);
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--mg-line);
  }

  .page-about .about-rail__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--mg-font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--mg-mist);
  }

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

  .page-about .about-rail__list li {
    margin: 0 0 2px;
  }

  .page-about .about-rail__list a {
    position: relative;
    padding: 8px 0 8px 15px;
    border: 0;
    background: none;
    font-size: 13.5px;
    color: var(--mg-mist);
  }

  .page-about .about-rail__list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 1px;
    background: var(--mg-line);
    transform: translateY(-50%);
    transition: width 0.22s ease, background 0.22s ease;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    color: var(--mg-cyan);
    background: none;
  }

  .page-about .about-rail__list a:hover::before,
  .page-about .about-rail__list a:focus-visible::before {
    width: 11px;
    background: var(--mg-cyan);
  }

  .page-about .about-section {
    padding-top: 40px;
  }

  .page-about .about-section__lede {
    font-size: 16px;
  }
}

@media (min-width: 1320px) {
  .page-about {
    --about-rail-w: 210px;
  }

  .page-about .about-layout {
    gap: 72px;
  }
}