.page-about {
  --about-line: rgba(31, 92, 74, 0.38);
  --about-line-soft: rgba(31, 92, 74, 0.2);
  --about-text: rgba(247, 251, 248, 0.74);
  --about-text-strong: rgba(247, 251, 248, 0.9);
  background: var(--ink-900);
  color: var(--field-white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-block {
  padding: clamp(44px, 7vw, 92px) 0;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(25px, 4.6vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 8px 0 18px;
  color: var(--field-white);
  overflow-wrap: break-word;
}

.page-about .about-p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: var(--f-16);
  line-height: 1.62;
  color: var(--about-text);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--f-12);
  letter-spacing: 0.18em;
  color: var(--cyan-400);
  margin: 0;
  text-transform: uppercase;
}

.page-about .u-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4.5vw, 48px) 0 clamp(38px, 6.5vw, 84px);
  background:
    radial-gradient(120% 100% at 84% -20%, rgba(53, 232, 210, 0.12), transparent 62%),
    radial-gradient(90% 70% at -12% 4%, rgba(255, 107, 44, 0.08), transparent 60%);
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 4.5vw, 46px);
  font-family: var(--font-mono);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  color: var(--gray-400);
}

.page-about .about-crumbs a {
  color: var(--gray-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--field-white);
  border-bottom-color: var(--moss-500);
}

.page-about .about-hero__title {
  margin: 10px 0 clamp(20px, 3.6vw, 30px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9.6vw, 96px);
  line-height: 0.94;
  letter-spacing: -0.015em;
  overflow-wrap: break-word;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--cyan-400);
}

.page-about .about-lead {
  margin: 0 0 clamp(26px, 4.5vw, 42px);
  max-width: 46ch;
  font-size: clamp(16px, 2.1vw, 20px);
  line-height: 1.6;
  color: var(--about-text-strong);
  overflow-wrap: break-word;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-line-soft);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-stats .stat {
  background: var(--ink-900);
  padding: 16px 14px 18px;
  min-width: 0;
}

.page-about .about-stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--field-white);
}

.page-about .about-stats .stat__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--gray-400);
}

.page-about .about-stats .stat__label {
  display: block;
  margin-top: 10px;
  font-size: var(--f-12);
  letter-spacing: 0.14em;
  color: var(--gray-400);
}

.page-about .about-hero__note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: var(--f-12);
  line-height: 1.7;
  color: var(--gray-400);
}

/* ---------- 起名 ---------- */
.page-about .about-origin {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

.page-about .about-origin__quote {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-left: clamp(14px, 2.4vw, 24px);
  border-left: 3px solid var(--orange-500);
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--field-white);
}

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

/* ---------- 历程时间线 ---------- */
.page-about .about-legs__figure {
  margin: 0 0 clamp(28px, 4.6vw, 44px);
}

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

.page-about .about-legs__figure img {
  filter: grayscale(0.18) brightness(0.86);
}

.page-about .figure__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--f-12);
  color: var(--gray-400);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--moss-500) 0%, rgba(31, 92, 74, 0.12) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px);
  min-width: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--moss-500);
}

.page-about .tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin-bottom: 6px;
}

.page-about .tl__year {
  font-size: var(--f-14);
  letter-spacing: 0.04em;
  color: var(--amber-300);
}

.page-about .tl__season {
  font-size: var(--f-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.2;
  color: var(--field-white);
}

.page-about .tl__text {
  margin: 0 0 12px;
  max-width: 58ch;
  font-size: var(--f-16);
  line-height: 1.6;
  color: var(--about-text);
}

.page-about .about-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--about-line);
  color: var(--gray-400);
  font-family: var(--font-mono);
  font-size: var(--f-12);
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-about .about-toggle:hover {
  color: var(--field-white);
  border-color: var(--moss-500);
}

.page-about .about-toggle:active {
  transform: scale(0.98);
}

.page-about .about-toggle:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-about .about-toggle .expand__sign {
  font-size: 15px;
  line-height: 1;
}

.page-about .tl__panel {
  padding-top: 14px;
  margin-top: 12px;
  border-top: 1px dashed var(--about-line-soft);
}

.page-about .tl__facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-about .tl__facts li {
  position: relative;
  padding-left: 16px;
  font-size: var(--f-14);
  line-height: 1.6;
  color: var(--about-text);
}

.page-about .tl__facts li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--moss-500);
}

/* ---------- 团队（奶油带） ---------- */
.page-about .about-team {
  background: var(--cream-100);
  color: var(--ink-900);
  padding: clamp(40px, 6.5vw, 80px) 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  min-width: 0;
}

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

.page-about .about-team__figure img {
  filter: grayscale(0.2) brightness(0.95);
}

.page-about .about-team .figure__caption {
  color: rgba(7, 19, 15, 0.55);
}

.page-about .about-team .about-h2 {
  color: var(--ink-900);
}

.page-about .about-team .eyebrow {
  color: var(--moss-500);
}

.page-about .about-team .about-p {
  color: rgba(7, 19, 15, 0.76);
}

.page-about .roster {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 1px;
  list-style: none;
  background: rgba(7, 19, 15, 0.18);
}

.page-about .roster__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding: 16px 14px 14px;
  background: var(--cream-100);
}

.page-about .roster__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 64px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--ink-900);
}

.page-about .roster__role {
  font-size: var(--f-14);
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .roster__tip {
  font-size: var(--f-12);
  line-height: 1.5;
  color: rgba(7, 19, 15, 0.62);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-about .roster__item:hover .roster__tip,
.page-about .roster__item:focus-within .roster__tip {
  opacity: 1;
  transform: none;
}

.page-about .duty {
  margin-top: clamp(20px, 3vw, 28px);
  padding: clamp(18px, 3vw, 24px);
  background: var(--ink-900);
  color: var(--field-white);
}

.page-about .duty__clock {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  letter-spacing: 0.03em;
  color: var(--cyan-400);
}

.page-about .duty__text {
  margin: 0;
  font-size: var(--f-14);
  line-height: 1.62;
  color: rgba(247, 251, 248, 0.76);
}

/* ---------- 评测框架 ---------- */
.page-about .eval {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .eval__legend {
  border: 1px solid var(--about-line);
  padding: 16px;
  align-self: start;
}

.page-about .eval__legend-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--f-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.page-about .eval__legend-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .eval__legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: var(--f-14);
  color: rgba(247, 251, 248, 0.8);
}

.page-about .eval__swatch {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-about .eval__swatch--1 { background: var(--cyan-400); }
.page-about .eval__swatch--2 { background: var(--amber-300); }
.page-about .eval__swatch--3 { background: var(--moss-500); }
.page-about .eval__swatch--4 { background: var(--orange-500); }
.page-about .eval__swatch--5 { background: rgba(247, 251, 248, 0.6); }
.page-about .eval__swatch--6 { background: var(--gray-400); }

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

.page-about .eval__item {
  padding: 14px 0 16px;
  border-bottom: 1px solid var(--about-line-soft);
  min-width: 0;
}

.page-about .eval__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
}

.page-about .eval__no {
  font-family: var(--font-mono);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  color: var(--amber-300);
}

.page-about .eval__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.2;
  color: var(--field-white);
}

.page-about .eval__count {
  font-family: var(--font-mono);
  font-size: var(--f-12);
  color: var(--gray-400);
}

.page-about .eval__head .about-toggle {
  margin-left: auto;
}

.page-about .eval__panel {
  padding-top: 12px;
}

.page-about .eval__panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-about .eval__panel li {
  position: relative;
  padding-left: 16px;
  font-size: var(--f-14);
  line-height: 1.6;
  color: var(--about-text);
}

.page-about .eval__panel li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--moss-500);
}

.page-about .about-eval__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .partner {
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-800);
  border-top: 2px solid var(--moss-500);
}

.page-about .partner:first-child {
  border-top-color: var(--orange-500);
}

.page-about .partner__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.2;
  color: var(--field-white);
}

.page-about .partner__facts {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .partner__facts li {
  font-size: var(--f-14);
  line-height: 1.6;
  color: var(--about-text);
}

.page-about .partner__num {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: var(--f-20);
  letter-spacing: -0.02em;
  color: var(--amber-300);
}

.page-about .partner__text {
  margin: 0 0 12px;
  font-size: var(--f-14);
  line-height: 1.62;
  color: var(--about-text);
}

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

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 7vw, 92px) 0 clamp(52px, 8vw, 96px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(53, 232, 210, 0.1), transparent 58%),
    var(--ink-800);
  border-top: 1px solid var(--about-line);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-cta__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: clamp(20px, 3vw, 28px);
  padding-top: 18px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-cta__links .link-arrow {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: var(--f-14);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .roster {
    grid-template-columns: 1.5fr 1fr;
    grid-template-areas:
      "a b"
      "a c"
      "d d";
  }

  .page-about .roster__item:nth-child(1) { grid-area: a; }
  .page-about .roster__item:nth-child(2) { grid-area: b; }
  .page-about .roster__item:nth-child(3) { grid-area: c; }
  .page-about .roster__item:nth-child(4) { grid-area: d; }

  .page-about .eval__panel ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 20px;
  }
}

@media (min-width: 860px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .eval {
    grid-template-columns: 230px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .tl__item:nth-child(even) {
    margin-left: 32px;
  }

  .page-about .tl__item:nth-child(even)::before {
    left: -46px;
  }

  .page-about .tl__head {
    margin-bottom: 8px;
  }
}

@media (hover: none) {
  .page-about .roster__tip {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .roster__tip,
  .page-about .about-toggle,
  .page-about .about-crumbs a {
    transition: none;
  }
}