.page-about {
  --about-gap: clamp(20px, 3.4vw, 44px);
  --about-ink-line: #232A2D;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--gut) + 40px) 0 0;
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .crumbs {
  margin-bottom: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 0.94;
  font-size: clamp(38px, 8.4vw, 92px);
  color: var(--white);
}

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

.page-about .about-hero__line--accent {
  color: var(--cyan);
  text-shadow: 4px 4px 0 var(--cyan-deep);
  margin-left: clamp(0px, 4vw, 56px);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin-top: clamp(20px, 3vw, 32px);
  color: var(--mist);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  max-width: 860px;
}

.page-about .about-fact {
  background: var(--panel);
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
  line-height: 1;
}

.page-about .about-fact__unit {
  font-size: 0.6em;
  color: var(--amber);
  margin-left: 2px;
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero__media {
  position: relative;
  margin-top: clamp(28px, 5vw, 56px);
  border-top: 2px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: clamp(220px, 42vw, 460px);
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 13, 14, 0.1), rgba(11, 13, 14, 0.82)),
    repeating-linear-gradient(90deg, rgba(53, 242, 208, 0.09) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .about-hero__media-tag {
  position: absolute;
  left: var(--gut);
  bottom: clamp(24px, 5vw, 52px);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid var(--cyan-deep);
  background: rgba(11, 13, 14, 0.72);
  padding: 6px 12px;
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-origin__copy p {
  color: var(--white);
  opacity: 0.86;
  max-width: 60ch;
}

.page-about .about-origin__points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-origin__points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--white);
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.page-about .about-origin__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  background: var(--amber);
  transform: rotate(45deg);
}

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

.page-about .about-origin__figure .img-frame {
  border: 2px solid var(--line);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.45);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__head {
  max-width: 62ch;
}

.page-about .about-timeline__lede {
  color: var(--mist);
}

.page-about .about-timeline__figure {
  margin: clamp(24px, 4vw, 40px) 0 clamp(30px, 5vw, 54px);
}

.page-about .about-timeline__figure .img-frame {
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .about-tl__item {
  background: var(--panel);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: clamp(18px, 3vw, 28px);
  border-left: 4px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-tl__item.is-active {
  border-left-color: var(--cyan);
  background: linear-gradient(100deg, rgba(14, 107, 94, 0.22), var(--panel) 58%);
}

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

.page-about .about-tl__year-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
  -webkit-text-stroke: 1px var(--line);
}

.page-about .about-tl__item.is-active .about-tl__year-num {
  color: var(--cyan);
  -webkit-text-stroke: 1px var(--cyan-deep);
}

.page-about .about-tl__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-tl__body p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  max-width: 62ch;
}

.page-about .about-tl__fields {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-tl__fields li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  border: 1px solid var(--line);
  background: var(--teal-ink);
  padding: 4px 10px;
}

/* ---------- 编辑室 ---------- */
.page-about .about-room__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-about .about-room__lede {
  color: var(--mist);
}

.page-about .about-room__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.page-about .about-team {
  grid-column: span 12;
  border: 2px solid var(--line);
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
}

.page-about .about-team--wide {
  background: linear-gradient(160deg, var(--panel), #10191a);
}

.page-about .about-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.03em;
}

.page-about .about-team__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 24px);
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-team__desc {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  max-width: 56ch;
}

.page-about .about-team__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--white);
  opacity: 0.85;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-clock {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-clock__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-clock__what {
  font-size: 14px;
  color: var(--white);
  opacity: 0.88;
}

.page-about .about-clock__row--accent .about-clock__time {
  color: var(--cyan);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience__head {
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .about-who {
  background: var(--panel);
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-who__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-who p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  max-width: 46ch;
}

.page-about .about-who__link {
  margin-top: auto;
  padding-top: 8px;
}

.page-about .about-who__link a {
  color: var(--cyan);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  padding-bottom: 2px;
}

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

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-partners__copy p {
  color: var(--white);
  opacity: 0.86;
  max-width: 60ch;
}

.page-about .about-partners__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

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

.page-about .about-pstat {
  background: var(--teal-ink);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-pstat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-pstat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 做法（奶油纸） ---------- */
.page-about .about-ways {
  color: var(--brown);
}

.page-about .about-ways__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-ways__lede {
  color: #5b4a3a;
}

.page-about .eyebrow--ink {
  color: var(--amber-ink);
}

.page-about .about-ways .sec-title {
  color: var(--brown);
}

.page-about .about-ways__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 3px solid var(--brown);
}

.page-about .about-way {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(42, 32, 24, 0.28);
}

.page-about .about-way__idx {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--amber-ink);
  line-height: 1.4;
}

.page-about .about-way__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  letter-spacing: 0.02em;
  color: var(--brown);
}

.page-about .about-way p {
  margin: 0;
  font-size: 15px;
  color: #4a3b2e;
  max-width: 58ch;
}

/* ---------- 收尾 ---------- */
.page-about .about-close__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-close__copy p {
  color: var(--white);
  opacity: 0.86;
  max-width: 56ch;
}

.page-about .about-close__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-close__meta {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--panel);
}

.page-about .about-close__row {
  display: grid;
  gap: 4px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-close__row:last-child {
  border-bottom: 0;
}

.page-about .about-close__row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-close__row dd {
  margin: 0;
  font-size: 14px;
  color: var(--white);
  opacity: 0.9;
}

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

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

  .page-about .about-clock__row {
    grid-template-columns: 140px 1fr;
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: 1.35fr 0.85fr;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 1.4fr 0.9fr;
  }

  .page-about .about-close__inner {
    grid-template-columns: 1.3fr 0.9fr;
  }

  .page-about .about-team {
    grid-column: span 6;
  }

  .page-about .about-team--wide {
    grid-column: span 12;
  }

  .page-about .about-ways__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-tl__item {
    grid-template-columns: 200px 1fr;
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-tl__item {
    grid-template-columns: 240px 1fr;
  }

  .page-about .about-audience__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}