.page-about {
  --about-pad: clamp(48px, 8vw, 112px);
  --about-gap: clamp(26px, 4.5vw, 56px);
  position: relative;
  overflow-x: clip;
  color: var(--ghost);
  background:
    radial-gradient(130% 55% at 82% -8%, rgba(90, 75, 224, 0.32), transparent 62%),
    radial-gradient(90% 40% at 0% 34%, rgba(47, 227, 208, 0.1), transparent 62%),
    linear-gradient(180deg, #071b31 0%, var(--deep) 46%, #04101f 100%);
}

.page-about .about-shell {
  position: relative;
  padding-top: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 76px) 0 clamp(44px, 7vw, 96px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__glow {
  position: absolute;
  inset: -30% -20% auto -20%;
  height: 130%;
  background:
    radial-gradient(48% 46% at 22% 18%, rgba(47, 227, 208, 0.22), transparent 70%),
    radial-gradient(52% 50% at 78% 8%, rgba(90, 75, 224, 0.4), transparent 72%);
  filter: blur(4px);
  animation: about-breathe 10s var(--ease) infinite;
  pointer-events: none;
}

.page-about .about-hero__net {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(68deg, rgba(123, 243, 230, 0.13) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(-28deg, rgba(47, 227, 208, 0.1) 0 1px, transparent 1px 58px);
  mask-image: radial-gradient(90% 80% at 60% 30%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(90% 80% at 60% 30%, #000 10%, transparent 78%);
  pointer-events: none;
}

@keyframes about-breathe {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.6; }
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  align-items: end;
}

.page-about .about-hero__copy {
  max-width: 40rem;
}

.page-about .about-hero__copy .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-soft);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(38px, 8vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ghost);
  text-shadow: 0 0 32px rgba(47, 227, 208, 0.18);
}

.page-about .about-hero__lead {
  margin: 0 0 14px;
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.7;
  color: var(--cyan-soft);
  max-width: 32em;
}

.page-about .about-hero__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--haze);
  max-width: 34em;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--glass);
  backdrop-filter: blur(6px);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(18px, 2.6vw, 24px);
  letter-spacing: 0.04em;
  color: var(--lime);
  text-shadow: 0 0 14px rgba(245, 225, 74, 0.32);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--haze);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: 0 26px 60px rgba(2, 10, 18, 0.75);
}

.page-about .about-cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--haze);
}

/* ---------- 栏目索引 ---------- */
.page-about .about-chapters {
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(11, 32, 54, 0.75), rgba(6, 20, 39, 0.15));
}

.page-about .about-chapters__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-about .about-chapters__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--haze);
}

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

.page-about .about-chapters__link {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ghost);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-chapters__link:hover,
.page-about .about-chapters__link:focus-visible {
  color: var(--deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  position: relative;
  padding: var(--about-pad) 0;
}

.page-about .about-section__head {
  max-width: 46rem;
  margin-bottom: var(--about-gap);
}

.page-about .about-section__head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-section__title {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ghost);
}

.page-about .about-section__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--haze);
  max-width: 34em;
}

/* ---------- 由来 ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-origin__text p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ghost);
  max-width: 36em;
}

.page-about .about-origin__text p:first-child::first-letter {
  float: left;
  margin: 6px 10px 0 0;
  font-family: var(--font-mono);
  font-size: 46px;
  line-height: 0.82;
  color: var(--coral);
}

.page-about .about-origin__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-note {
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius-md);
  background: linear-gradient(155deg, rgba(11, 32, 54, 0.9), rgba(6, 20, 39, 0.55));
}

.page-about .about-note__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--coral-soft);
}

.page-about .about-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
}

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

.page-about .about-origin__facts li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  justify-content: space-between;
  padding: 12px 2px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-origin__k {
  font-size: 13px;
  color: var(--haze);
}

.page-about .about-origin__v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

/* ---------- 六个功能区 ---------- */
.page-about .about-section--zones {
  background:
    radial-gradient(80% 50% at 100% 0%, rgba(90, 75, 224, 0.22), transparent 66%),
    linear-gradient(180deg, transparent, rgba(11, 32, 54, 0.55) 40%, transparent);
}

.page-about .about-zones {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-plate {
  position: relative;
  padding: 22px 20px 18px;
  border: 1px solid var(--line);
  border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  background: linear-gradient(158deg, rgba(11, 32, 54, 0.94), rgba(6, 20, 39, 0.78));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: transform 240ms var(--ease), border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--cyan);
  opacity: 0.7;
}

.page-about .about-plate:hover,
.page-about .about-plate:focus-within {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 44px rgba(2, 10, 18, 0.8);
}

.page-about .about-plate .plate-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(47, 227, 208, 0.45);
}

.page-about .about-plate .plate-name {
  margin: 8px 0 10px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ghost);
}

.page-about .about-plate__text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .about-plate__link {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  opacity: 0.82;
  transition: opacity 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-plate__link::after {
  content: " →";
}

.page-about .about-plate:hover .about-plate__link,
.page-about .about-plate__link:focus-visible {
  opacity: 1;
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

/* ---------- 赛季 ---------- */
.page-about .about-season {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-season__copy .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-season__copy p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ghost);
  max-width: 36em;
}

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

.page-about .about-season__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--haze);
}

.page-about .about-season__num {
  flex: none;
  min-width: 44px;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--lime);
  text-shadow: 0 0 16px rgba(245, 225, 74, 0.3);
}

.page-about .about-season__chart {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--glass);
  backdrop-filter: blur(8px);
}

.page-about .about-season__bar {
  display: flex;
  gap: 5px;
  height: 14px;
  margin-bottom: 20px;
}

.page-about .about-season__seg {
  border-radius: 3px;
  height: 100%;
}

.page-about .about-season__seg--1 { flex: 1; background: rgba(47, 227, 208, 0.32); }
.page-about .about-season__seg--2 { flex: 2; background: rgba(47, 227, 208, 0.58); }
.page-about .about-season__seg--3 { flex: 1.4; background: linear-gradient(90deg, var(--coral), var(--coral-soft)); }
.page-about .about-season__seg--4 { flex: 0.8; background: rgba(159, 182, 201, 0.32); }

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

.page-about .about-season__legend li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ghost);
}

.page-about .about-season__dot {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  box-shadow: 0 0 10px currentColor;
}

.page-about .about-season__dot--1 { background: rgba(47, 227, 208, 0.4); color: rgba(47, 227, 208, 0.4); }
.page-about .about-season__dot--2 { background: var(--cyan); color: var(--cyan); }
.page-about .about-season__dot--3 { background: var(--coral); color: var(--coral); }
.page-about .about-season__dot--4 { background: var(--haze); color: var(--haze); }

/* ---------- 时间线 ---------- */
.page-about .about-section--timeline {
  overflow: hidden;
}

.page-about .about-tl__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .about-tl__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.13;
  filter: saturate(0.6);
}

.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 6px 0 0 22px;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 227, 208, 0.25) 62%, rgba(90, 75, 224, 0.4));
  box-shadow: 0 0 14px rgba(47, 227, 208, 0.5);
}

.page-about .about-tl__item {
  position: relative;
  margin-bottom: 14px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: 20px;
  left: -19px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 20, 39, 0.95), 0 0 16px rgba(47, 227, 208, 0.75);
}

.page-about .about-tl__card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(11, 32, 54, 0.9), rgba(6, 20, 39, 0.72));
  padding: 14px 16px;
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .about-tl__card[open] {
  border-color: var(--line-strong);
  background: linear-gradient(150deg, rgba(11, 32, 54, 0.98), rgba(6, 20, 39, 0.86));
}

.page-about .about-tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__stage {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-tl__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ghost);
}

.page-about .about-tl__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--haze);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-team__main .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-team__main > p {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ghost);
  max-width: 36em;
}

.page-about .about-team__bars {
  display: grid;
  gap: 14px;
  max-width: 34rem;
}

.page-about .about-team__row {
  display: grid;
  gap: 8px;
}

.page-about .about-team__name {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--haze);
}

.page-about .about-team__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 34px;
  padding-right: 10px;
  border-radius: 4px var(--radius-pill) var(--radius-pill) 4px;
  min-width: 62px;
}

.page-about .about-team__bar--content {
  width: 100%;
  background: linear-gradient(90deg, rgba(47, 227, 208, 0.35), rgba(47, 227, 208, 0.85));
}

.page-about .about-team__bar--frontend {
  width: 75%;
  background: linear-gradient(90deg, rgba(90, 75, 224, 0.35), rgba(90, 75, 224, 0.85));
}

.page-about .about-team__bar--data {
  width: 50%;
  background: linear-gradient(90deg, rgba(255, 107, 74, 0.4), rgba(255, 107, 74, 0.9));
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--deep);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

/* ---------- 三件事 ---------- */
.page-about .about-section--promise {
  padding-bottom: clamp(56px, 9vw, 128px);
  background: radial-gradient(80% 60% at 50% 100%, rgba(90, 75, 224, 0.22), transparent 70%);
}

.page-about .about-promise {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-promise__item {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(11, 32, 54, 0.6);
}

.page-about .about-promise__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-promise__item h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ghost);
}

.page-about .about-promise__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: 30px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(11, 32, 54, 0.95), rgba(6, 20, 39, 0.7));
}

.page-about .about-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ghost);
}

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

.page-about .about-cta__mail {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .about-cta__mail:hover,
.page-about .about-cta__mail:focus-visible {
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-zones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-zones > li:nth-child(even) {
    transform: translateY(22px);
  }

  .page-about .about-promise {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 3vw, 48px);
  }

  .page-about .about-hero__figure {
    transform: translateY(26px);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 4vw, 64px);
  }

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

  .page-about .about-zones > li:nth-child(even) {
    transform: translateY(22px);
  }

  .page-about .about-zones > li:nth-child(3n+2) {
    transform: translateY(30px);
  }

  .page-about .about-season {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 4vw, 64px);
  }

  .page-about .about-season__chart {
    position: sticky;
    top: 96px;
  }

  .page-about .about-tl {
    padding: 8px 0 0;
  }

  .page-about .about-tl::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-tl__item {
    width: calc(50% - 38px);
    margin-bottom: 26px;
  }

  .page-about .about-tl__item:nth-child(odd) {
    margin-right: auto;
    text-align: right;
  }

  .page-about .about-tl__item:nth-child(odd) .about-tl__sum {
    justify-content: flex-end;
  }

  .page-about .about-tl__item:nth-child(even) {
    margin-left: auto;
  }

  .page-about .about-tl__item:nth-child(odd)::before {
    left: auto;
    right: -43px;
  }

  .page-about .about-tl__item:nth-child(even)::before {
    left: -43px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 4vw, 64px);
    align-items: center;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 28px;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__glow {
    animation: none;
    opacity: 0.45;
  }

  .page-about .about-plate,
  .page-about .about-chapters__link {
    transition: none;
  }

  .page-about .about-plate:hover,
  .page-about .about-plate:focus-within {
    transform: none;
  }
}