.page-about {
  --rank-1: #5EEAD4;
  --rank-2: #35F0E0;
  --rank-3: #8B5CF6;
  --rank-4: #C05CE6;
  --rank-5: #FF3E8E;
  --rank-6: #FFC24B;
  --about-gap: clamp(56px, 9vw, 116px);
  color: var(--white);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb .sep {
  margin: 0 8px;
  opacity: .5;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 42px);
  padding-bottom: var(--about-gap);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 44px);
  align-items: start;
}

.page-about .about-hero__copy {
  position: relative;
  padding: clamp(22px, 3.4vw, 44px);
  border: 2px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(22, 38, 74, .88) 0%, rgba(7, 11, 26, .94) 64%);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__copy::before,
.page-about .about-hero__copy::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--cyan);
  opacity: .85;
  pointer-events: none;
}

.page-about .about-hero__copy::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__copy::after {
  right: -2px;
  bottom: -2px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-annot {
  position: absolute;
  top: 22px;
  right: 16px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .34em;
  color: var(--mist);
  opacity: .72;
  pointer-events: none;
}

.page-about .about-h1 {
  margin: 12px 0 20px;
  font-size: clamp(29px, 5.2vw, 54px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -.02em;
  text-shadow: 0 0 18px rgba(53, 240, 224, .26);
}

.page-about .about-lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-facts dt {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(19px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  background: var(--felt);
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}

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

.page-about .about-caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
  background: rgba(7, 11, 26, .92);
  border-top: 1px solid var(--line);
}

/* ---------- 通用区块标题 ---------- */
.page-about .about-head {
  max-width: 720px;
}

.page-about .section-title {
  margin: 10px 0 0;
  font-size: clamp(25px, 4vw, 42px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.02em;
  text-shadow: 0 0 18px rgba(53, 240, 224, .2);
}

.page-about .about-sub {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-more {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 224, .45);
  transition: border-color .2s ease, color .2s ease;
}

.page-about .about-more a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 成长线 ---------- */
.page-about .about-line {
  padding-block: var(--about-gap);
  background:
    radial-gradient(120% 70% at 8% 0%, rgba(22, 38, 74, .7) 0%, rgba(7, 11, 26, 0) 62%),
    var(--ink);
}

.page-about .about-line__list {
  list-style: none;
  position: relative;
  margin: clamp(30px, 4.4vw, 54px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-about .about-line__list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 52%, var(--gold) 100%);
  opacity: .5;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-left: 34px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 224, .14);
  transition: box-shadow .22s ease, border-color .22s ease;
}

.page-about .tl-item:nth-child(2)::before { border-color: var(--rose); box-shadow: 0 0 0 4px rgba(255, 62, 142, .14); }
.page-about .tl-item:nth-child(3)::before { border-color: var(--violet); box-shadow: 0 0 0 4px rgba(139, 92, 246, .16); }
.page-about .tl-item:nth-child(4)::before { border-color: var(--gold); box-shadow: 0 0 0 4px rgba(255, 194, 75, .16); }
.page-about .tl-item:nth-child(5)::before { border-color: var(--green); box-shadow: 0 0 0 4px rgba(47, 224, 138, .14); }

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  box-shadow: 0 0 0 8px rgba(53, 240, 224, .22);
}

.page-about .tl-version {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding: 2px 0;
  border-bottom: 1px solid rgba(53, 240, 224, .38);
}

.page-about .tl-item:nth-child(2) .tl-version { color: var(--rose); border-bottom-color: rgba(255, 62, 142, .42); }
.page-about .tl-item:nth-child(3) .tl-version { color: var(--violet); border-bottom-color: rgba(139, 92, 246, .46); }
.page-about .tl-item:nth-child(4) .tl-version { color: var(--gold); border-bottom-color: rgba(255, 194, 75, .44); }
.page-about .tl-item:nth-child(5) .tl-version { color: var(--green); border-bottom-color: rgba(47, 224, 138, .4); }

.page-about .tl-body {
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(150deg, rgba(15, 26, 51, .9) 0%, rgba(7, 11, 26, .86) 100%);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.page-about .tl-item:nth-child(2) .tl-body { border-left-color: var(--rose); }
.page-about .tl-item:nth-child(3) .tl-body { border-left-color: var(--violet); }
.page-about .tl-item:nth-child(4) .tl-body { border-left-color: var(--gold); }
.page-about .tl-item:nth-child(5) .tl-body { border-left-color: var(--green); }

.page-about .tl-item:hover .tl-body,
.page-about .tl-item:focus-within .tl-body {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 44px -30px rgba(0, 0, 0, .95);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.4;
}

.page-about .tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 段位 ---------- */
.page-about .about-ranks {
  padding-block: var(--about-gap);
  background:
    radial-gradient(100% 60% at 92% 4%, rgba(139, 92, 246, .16) 0%, rgba(7, 11, 26, 0) 60%),
    var(--ink);
}

.page-about .rank-band {
  position: relative;
  margin-top: clamp(28px, 4vw, 46px);
  border: 2px solid var(--line-strong);
  overflow: hidden;
  background: var(--felt);
}

.page-about .rank-band__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.85);
  pointer-events: none;
}

.page-about .rank-band__cells {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: clamp(16px, 2.4vw, 28px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .rank-cell {
  display: grid;
  gap: 6px;
  padding: 14px 12px;
  border: 1px solid var(--line);
  background: rgba(7, 11, 26, .76);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.page-about .rank-cell::before {
  content: "";
  display: block;
  height: 4px;
  background: var(--band, var(--cyan));
  margin-bottom: 4px;
}

.page-about .rank-cell:nth-child(1) { --band: var(--rank-1); }
.page-about .rank-cell:nth-child(2) { --band: var(--rank-2); }
.page-about .rank-cell:nth-child(3) { --band: var(--rank-3); }
.page-about .rank-cell:nth-child(4) { --band: var(--rank-4); }
.page-about .rank-cell:nth-child(5) { --band: var(--rank-5); }
.page-about .rank-cell:nth-child(6) { --band: var(--rank-6); }

.page-about .rank-cell:hover {
  transform: translateY(-5px);
  border-color: var(--band, var(--cyan));
  box-shadow: 0 18px 34px -22px var(--band, var(--cyan));
}

.page-about .rank-num {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-about .rank-name {
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
}

.page-about .rank-stars {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--band, var(--cyan));
}

.page-about .rank-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(24px, 3.2vw, 38px);
}

.page-about .rank-note {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-top: 3px solid var(--violet);
  background: rgba(15, 26, 51, .6);
}

.page-about .rank-note:last-child {
  border-top-color: var(--gold);
}

.page-about .rank-note h3 {
  margin: 0 0 10px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
}

.page-about .rank-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 房间矩阵 ---------- */
.page-about .about-rooms {
  padding-block: var(--about-gap);
  background:
    radial-gradient(90% 60% at 0% 100%, rgba(53, 240, 224, .1) 0%, rgba(7, 11, 26, 0) 62%),
    var(--ink);
}

.page-about .matrix-plane {
  position: relative;
  margin-top: clamp(28px, 4vw, 46px);
  aspect-ratio: 16 / 11;
  border: 1px solid var(--line);
  background-color: rgba(15, 26, 51, .5);
  background-image:
    linear-gradient(rgba(143, 163, 200, .1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 200, .1) 1px, transparent 1px);
  background-size: 20% 20%;
}

.page-about .matrix-axis {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .matrix-axis--x {
  right: 10px;
  bottom: 8px;
}

.page-about .matrix-axis--y {
  left: 10px;
  top: 8px;
}

.page-about .matrix-points {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .mp {
  position: absolute;
  left: var(--x);
  bottom: var(--y);
  transform: translate(-50%, 50%);
  z-index: 2;
}

.page-about .mp-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid rgba(53, 240, 224, .55);
  border-radius: var(--pill);
  background: rgba(7, 11, 26, .9);
  font-size: 12px;
  line-height: 1;
  color: var(--white);
  white-space: nowrap;
  cursor: default;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.page-about .mp:nth-child(1) .mp-dot { border-color: rgba(53, 240, 224, .75); }
.page-about .mp:nth-child(2) .mp-dot,
.page-about .mp:nth-child(3) .mp-dot,
.page-about .mp:nth-child(4) .mp-dot { border-color: rgba(255, 62, 142, .62); }
.page-about .mp:nth-child(5) .mp-dot { border-color: rgba(255, 194, 75, .68); }
.page-about .mp:nth-child(6) .mp-dot,
.page-about .mp:nth-child(7) .mp-dot { border-color: rgba(139, 92, 246, .75); }
.page-about .mp:nth-child(8) .mp-dot { border-color: rgba(53, 240, 224, .55); }

.page-about .mp:hover .mp-dot,
.page-about .mp:focus-within .mp-dot {
  transform: translateY(-2px);
  box-shadow: 0 0 0 3px rgba(53, 240, 224, .18);
}

.page-about .mp-tip {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  width: 206px;
  padding: 11px 13px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--white);
  background: rgba(15, 26, 51, .98);
  border: 1px solid var(--cyan);
  box-shadow: var(--shadow-deep);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(6px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  pointer-events: none;
  z-index: 6;
}

.page-about .mp:hover .mp-tip,
.page-about .mp:focus-within .mp-tip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--about-gap);
  background: var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 44px);
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-about .about-team__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  background: var(--felt);
  overflow: hidden;
}

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

.page-about .about-team__lead {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .team-list {
  list-style: none;
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--line);
  background: rgba(15, 26, 51, .6);
}

.page-about .team-num {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}

.page-about .team-item h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 700;
}

.page-about .team-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-block: var(--about-gap);
  background:
    radial-gradient(110% 70% at 50% 0%, rgba(255, 194, 75, .12) 0%, rgba(7, 11, 26, 0) 58%),
    var(--ink);
}

.page-about .next-list {
  list-style: none;
  counter-reset: nx;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .next-list li {
  position: relative;
  counter-increment: nx;
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px) clamp(58px, 5.5vw, 80px);
  border: 1px solid var(--line);
  background: rgba(15, 26, 51, .58);
  transition: border-color .22s ease, transform .22s ease;
}

.page-about .next-list li:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .next-list li::before {
  content: counter(nx, decimal-leading-zero);
  position: absolute;
  left: clamp(16px, 2.2vw, 26px);
  top: clamp(18px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--gold);
  opacity: .9;
}

.page-about .next-list h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
}

.page-about .next-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .next-cta {
  display: grid;
  gap: 20px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 34px);
  border: 2px solid var(--line-strong);
  border-left: 4px solid var(--cyan);
  background: linear-gradient(150deg, rgba(22, 38, 74, .82) 0%, rgba(7, 11, 26, .9) 100%);
}

.page-about .next-cta p {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .next-cta .btn {
  justify-self: start;
}

/* ---------- 常驻浮标 ---------- */
.page-about .about-float {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: 88px;
  z-index: 40;
  box-shadow: 0 0 0 1px rgba(53, 240, 224, .4), 0 20px 42px -20px rgba(53, 240, 224, .7);
  animation: about-float-breathe 3.6s ease-in-out infinite;
}

@keyframes about-float-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: .86; }
}

/* ---------- 断点 ---------- */
@media (max-width: 759px) {
  .page-about .about-annot {
    display: none;
  }
}

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

@media (min-width: 720px) {
  .page-about .rank-band__cells {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .about-line__list::before {
    left: 70px;
  }

  .page-about .tl-item {
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 42px;
    padding-left: 0;
  }

  .page-about .tl-item::before {
    left: 65px;
    top: 20px;
  }

  .page-about .tl-mark {
    padding-top: 18px;
    text-align: right;
  }

  .page-about .tl-version {
    font-size: 13px;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .next-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-float {
    bottom: 32px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

@media (max-width: 719px) {
  .page-about .matrix-plane {
    aspect-ratio: auto;
    padding: 16px;
  }

  .page-about .matrix-axis,
  .page-about .matrix-plane::before {
    display: none;
  }

  .page-about .matrix-points {
    position: static;
    display: grid;
    gap: 12px;
  }

  .page-about .mp {
    position: static;
    transform: none;
  }

  .page-about .mp-dot {
    width: 100%;
    justify-content: flex-start;
    border-radius: 6px;
    padding: 12px 14px;
    font-size: 14px;
  }

  .page-about .mp-tip {
    position: static;
    width: auto;
    margin-top: 8px;
    padding: 0 4px;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: 0;
    box-shadow: none;
    color: var(--mist);
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-float {
    animation: none;
  }

  .page-about .tl-body,
  .page-about .mp-dot,
  .page-about .rank-cell,
  .page-about .next-list li {
    transition: none;
  }
}

.page-about {
  --x: inherit;
  --y: inherit;
}