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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 6vw, 56px) 0 clamp(44px, 7vw, 88px);
  background:
    repeating-linear-gradient(90deg, rgba(244, 240, 230, 0.055) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(244, 240, 230, 0.035) 0 1px, transparent 1px 96px),
    var(--teal);
  border-bottom: var(--edge) solid var(--ink);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -60px;
  width: clamp(150px, 26vw, 320px);
  height: clamp(150px, 26vw, 320px);
  background: var(--ochre);
  opacity: 0.38;
  transform: rotate(18deg);
  pointer-events: none;
}

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

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.15rem, 8vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--mist);
  margin: clamp(14px, 3vw, 24px) 0 clamp(16px, 3vw, 26px);
  max-width: 16em;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.86);
}

.page-about .about-hero__jump {
  margin-top: clamp(20px, 3.5vw, 32px);
}

.page-about .about-hero__strip {
  list-style: none;
  margin: clamp(26px, 5vw, 44px) 0 0;
  padding: clamp(16px, 3vw, 22px) 0 0;
  border-top: 2px solid rgba(244, 240, 230, 0.25);
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-hero__strip li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(244, 240, 230, 0.72);
}

.page-about .about-hero__strip .score {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.35rem, 4vw, 1.95rem);
  line-height: 1;
  color: var(--lime);
}

/* ---------- 通用排版 ---------- */
.page-about h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.7rem, 5vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(12px, 2.5vw, 20px);
}

.page-about h3 {
  font-family: var(--font-head);
  font-weight: 800;
}

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

.page-about .section--mist p {
  line-height: 1.8;
}

.page-about .media-frame {
  margin: 0;
}

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

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding: clamp(44px, 8vw, 96px) 0;
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(0.98rem, 2vw, 1.05rem);
  color: var(--teal-soft);
}

.page-about .about-origin__points {
  display: grid;
  gap: 16px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-point {
  border-left: var(--edge) solid var(--ochre);
  padding-left: 14px;
}

.page-about .about-point p {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--teal-soft);
}

.page-about .about-origin__media {
  box-shadow: 8px 8px 0 var(--ochre);
}

/* ---------- 时间线 ---------- */
.page-about .about-history {
  padding: clamp(44px, 8vw, 96px) 0;
}

.page-about .about-history__title {
  color: var(--mist);
  max-width: 16em;
}

.page-about .about-history__lede {
  max-width: 56ch;
  color: rgba(244, 240, 230, 0.78);
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  line-height: 1.8;
}

.page-about .about-history__wrap {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .about-tl {
  display: grid;
  gap: 12px;
  padding-bottom: clamp(16px, 3vw, 24px);
  border-bottom: 2px dashed rgba(110, 138, 140, 0.55);
}

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

.page-about .about-tl__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: max-content;
  padding: 8px 14px;
  background: var(--ochre);
  color: var(--mist);
  box-shadow: 5px 5px 0 var(--ochre-deep);
  transition: background var(--ease), color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.page-about .about-tl:hover .about-tl__year {
  background: var(--lime);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  transform: translate(-2px, -2px);
}

.page-about .about-tl__year .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 4.2vw, 1.9rem);
  letter-spacing: -0.02em;
  line-height: 1;
}

.page-about .about-tl__tag {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  opacity: 0.85;
}

.page-about .about-tl--now .about-tl__year {
  box-shadow: 5px 5px 0 var(--lime);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-size: clamp(1.08rem, 3vw, 1.35rem);
  color: var(--mist);
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 52ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.76);
}

.page-about .about-history__aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-history__aside .note {
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(244, 240, 230, 0.6);
  margin: 0;
}

/* ---------- 四级整理 ---------- */
.page-about .about-method {
  padding: clamp(44px, 8vw, 96px) 0;
}

.page-about .about-method__head {
  max-width: 58ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-method__head .lede {
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  line-height: 1.8;
  color: var(--teal-soft);
  margin: 0;
}

.page-about .about-method__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-funnel {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-funnel polygon {
  stroke: var(--ink);
  stroke-width: 3;
  stroke-linejoin: miter;
}

.page-about .about-funnel__b1 {
  fill: var(--teal);
}

.page-about .about-funnel__b2 {
  fill: var(--teal-soft);
}

.page-about .about-funnel__b3 {
  fill: var(--ochre);
}

.page-about .about-funnel__b4 {
  fill: var(--lime);
}

.page-about .about-funnel__t {
  fill: var(--mist);
  font-family: var(--font-head);
  font-size: 27px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.page-about .about-funnel__t--ink {
  fill: var(--ink);
}

.page-about .about-method__levels {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
}

.page-about .about-level {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 14px;
  align-items: baseline;
  padding-top: 12px;
  border-top: 2px solid rgba(11, 46, 51, 0.18);
}

.page-about .about-level .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ochre);
}

.page-about .about-level h3 {
  margin: 0;
  font-size: 1.12rem;
  color: var(--teal);
}

.page-about .about-level p {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--teal-soft);
}

.page-about .about-method__foot {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(30px, 5vw, 54px);
  align-items: stretch;
}

.page-about .about-method__panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: clamp(20px, 3vw, 32px);
  color: var(--mist);
}

.page-about .about-method__panel h3 {
  margin: 0;
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--mist);
}

.page-about .about-method__panel p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.88);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(44px, 8vw, 96px) 0;
  background:
    repeating-linear-gradient(135deg, rgba(184, 255, 61, 0.06) 0 2px, transparent 2px 22px),
    var(--teal-soft);
  border-top: var(--edge) solid var(--ink);
  border-bottom: var(--edge) solid var(--ink);
}

.page-about .about-team__intro {
  max-width: 60ch;
}

.page-about .about-team__intro .lede {
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  line-height: 1.8;
  color: rgba(244, 240, 230, 0.82);
  margin: 0;
}

.page-about .about-team__stats {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: clamp(24px, 4vw, 40px) 0;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2.5vw, 20px);
  background: rgba(7, 20, 23, 0.45);
  border: var(--edge) solid rgba(244, 240, 230, 0.28);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .about-stat:hover {
  border-color: var(--lime);
  transform: translate(-2px, -2px);
}

.page-about .about-stat .score {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 5vw, 2.1rem);
  line-height: 1;
  color: var(--lime);
}

.page-about .about-stat span:last-child {
  font-size: 0.82rem;
  line-height: 1.5;
  color: rgba(244, 240, 230, 0.7);
}

.page-about .about-team__roles {
  display: grid;
  gap: clamp(14px, 2.5vw, 20px);
}

.page-about .about-role {
  padding: clamp(16px, 2.5vw, 22px);
  background: var(--ink);
  border: var(--edge) solid rgba(244, 240, 230, 0.16);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .about-role:hover {
  border-color: var(--sand);
  transform: translate(0, -3px);
}

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--sand);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.75;
  color: rgba(244, 240, 230, 0.75);
}

/* ---------- 合作与资质 ---------- */
.page-about .about-partner {
  padding: clamp(44px, 8vw, 96px) 0;
}

.page-about .about-partner h2 {
  color: var(--mist);
  max-width: 15em;
}

.page-about .about-partner__grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-cert {
  padding: clamp(18px, 3vw, 26px);
  background: var(--mist);
  color: var(--teal);
  border: var(--edge) solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cert .score {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--ochre);
}

.page-about .about-cert .tag {
  display: inline-block;
  margin-bottom: 6px;
}

.page-about .about-cert h3 {
  margin: 10px 0 10px;
  font-size: 1.08rem;
  color: var(--ochre-deep);
}

.page-about .about-cert p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--teal-soft);
}

/* ---------- 从这里开始 ---------- */
.page-about .about-why {
  padding: clamp(44px, 8vw, 96px) 0;
}

.page-about .about-why__inner {
  max-width: 1100px;
}

.page-about .about-why__list {
  margin: clamp(18px, 3vw, 28px) 0 clamp(26px, 4vw, 42px);
  display: grid;
  gap: 12px;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--teal-soft);
}

.page-about .about-why__links {
  display: grid;
  gap: 16px;
}

.page-about .about-linkcard {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 3vw, 22px);
  text-decoration: none;
  color: var(--teal);
  background: transparent;
  border: var(--edge) solid var(--teal);
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.page-about .about-linkcard:hover,
.page-about .about-linkcard:focus-visible {
  border-color: var(--ochre);
  box-shadow: 8px 8px 0 var(--ochre);
  transform: translate(-3px, -3px);
}

.page-about .about-linkcard .tag {
  justify-self: start;
}

.page-about .about-linkcard h3 {
  margin: 2px 0 0;
  font-size: 1.08rem;
}

.page-about .about-linkcard p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-linkcard .btn-arrow {
  color: var(--ochre);
  font-weight: 700;
}

.page-about .about-top {
  display: inline-block;
  margin-top: clamp(26px, 4vw, 40px);
  padding-bottom: 2px;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 2px solid var(--ochre);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-top:hover {
  color: var(--ochre);
  border-color: var(--teal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-about .about-hero__strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-tl {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }

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

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

@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 400px) minmax(0, 1fr);
  }

  .page-about .about-method__foot {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .about-history__wrap {
    grid-template-columns: minmax(0, 1fr) 290px;
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__year,
  .page-about .about-stat,
  .page-about .about-role,
  .page-about .about-linkcard,
  .page-about .about-top {
    transition: none;
  }

  .page-about .about-tl:hover .about-tl__year,
  .page-about .about-stat:hover,
  .page-about .about-role:hover,
  .page-about .about-linkcard:hover,
  .page-about .about-linkcard:focus-visible {
    transform: none;
  }
}