.page-about {
  --about-line: rgba(16, 20, 23, 0.16);
  --about-soft: rgba(16, 20, 23, 0.66);
  --about-w: 1140px;
  display: block;
  background: var(--sand-100);
  color: var(--ink-950);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.page-about [id] {
  scroll-margin-top: 92px;
}

.page-about .about-main {
  max-width: var(--about-w);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 52px) var(--gutter) clamp(60px, 8vw, 110px);
}

.page-about .about-main p {
  margin: 0 0 1em;
  max-width: 64ch;
}

.page-about .about-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tide-600);
}

.page-about .about-sec {
  margin-top: clamp(56px, 8vw, 104px);
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px 18px;
  margin-bottom: clamp(20px, 3vw, 32px);
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink-950);
}

.page-about .about-no {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--coral-500);
}

.page-about .about-sec__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--abyss-950);
}

.page-about .about-sec__intro {
  font-size: 15.5px;
  color: var(--about-soft);
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏框景 ---------- */

.page-about .about-hero {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
  margin-top: clamp(16px, 2.6vw, 30px);
  padding: clamp(18px, 3vw, 40px);
  border: 3px solid var(--ink-950);
  background: var(--white-050);
  box-shadow: 10px 10px 0 0 var(--abyss-950);
}

.page-about .about-hero__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 22px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink-950);
}

.page-about .about-hero__stamp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--abyss-800);
}

.page-about .about-hero__head h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(34px, 7.2vw, 66px);
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: var(--abyss-950);
}

.page-about .about-hero__head h1 span {
  display: block;
}

.page-about .about-hero__head h1 .h1-strong {
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--abyss-800);
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--about-soft);
  max-width: 46ch;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 3px solid var(--ink-950);
  background: var(--abyss-950);
  overflow: hidden;
  box-shadow: 8px 8px 0 0 var(--coral-500);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__figcap {
  position: absolute;
  left: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--abyss-950);
  color: var(--sand-100);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-hero__figcap span {
  color: var(--cyan-400);
}

@media (min-width: 880px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-hero__top {
    grid-column: 1 / -1;
  }
}

/* ---------- 起点与四条线 ---------- */

.page-about .about-origin {
  display: grid;
  gap: clamp(24px, 3.2vw, 44px);
}

.page-about .about-origin__lead {
  font-size: clamp(17px, 2vw, 20px) !important;
  line-height: 1.68;
  font-weight: 600;
  color: var(--abyss-800);
  padding-left: 16px;
  border-left: 4px solid var(--coral-500);
}

.page-about .about-origin__text p:not(.about-origin__lead) {
  font-size: 15px;
  color: var(--about-soft);
}

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-lines li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  grid-template-areas:
    "idx title"
    "idx text";
  gap: 2px 14px;
  padding: 16px 18px;
  border: 2px solid var(--ink-950);
  background: var(--white-050);
}

.page-about .about-lines li + li {
  margin-top: -2px;
}

.page-about .about-lines__idx {
  grid-area: idx;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--coral-500);
}

.page-about .about-lines h3 {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--abyss-950);
}

.page-about .about-lines p {
  grid-area: text;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-soft);
  max-width: none;
}

@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

/* ---------- 时间轨 ---------- */

.page-about .about-timeline-fig {
  position: relative;
  margin: 0 0 clamp(22px, 3vw, 34px);
  border: 3px solid var(--ink-950);
  background: var(--abyss-950);
  overflow: hidden;
  box-shadow: 8px 8px 0 0 var(--cyan-400);
}

.page-about .about-timeline-fig img,
.page-about .about-rhythm__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figcap {
  position: absolute;
  left: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--coral-500);
  color: var(--abyss-950);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-figcap span {
  opacity: 0.72;
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .about-jump a {
  padding: 7px 12px;
  border: 1px solid var(--ink-950);
  background: var(--white-050);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 160ms var(--ease), color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  background: var(--abyss-800);
  color: var(--cyan-400);
  transform: translateY(-2px);
}

.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--coral-500) 0%, var(--tide-600) 48%, var(--cyan-400) 100%);
  opacity: 0.72;
}

.page-about .about-stage {
  position: relative;
  padding-left: 68px;
  padding-bottom: clamp(26px, 3.6vw, 44px);
}

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

.page-about .about-stage__no {
  position: absolute;
  left: 6px;
  top: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--abyss-800);
  border: 2px solid var(--ink-950);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-stage--now .about-stage__no {
  background: var(--coral-500);
  color: var(--abyss-950);
}

.page-about .about-stage h3 {
  margin: 4px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--abyss-950);
}

.page-about .about-stage p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--about-soft);
  max-width: 62ch;
}

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

.page-about .about-stage__facts li {
  padding: 5px 10px;
  border: 1px solid var(--about-line);
  background: var(--fog-200);
  color: var(--abyss-800);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

@media (hover: hover) {
  .page-about .about-stage:hover .about-stage__facts li {
    border-color: var(--tide-600);
  }
}

@media (max-width: 520px) {
  .page-about .about-track::before {
    left: 19px;
  }

  .page-about .about-stage {
    padding-left: 52px;
  }

  .page-about .about-stage__no {
    left: 4px;
    width: 30px;
    height: 30px;
    font-size: 11px;
  }
}

/* ---------- 归档节奏 ---------- */

.page-about .about-rhythm {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-rhythm__panel {
  padding: clamp(20px, 3vw, 36px);
  border: 3px solid var(--ink-950);
  background: var(--abyss-950);
  box-shadow: 8px 8px 0 0 var(--cyan-400);
  color: var(--sand-100);
}

.page-about .about-rhythm__kicker {
  margin: 0 0 10px !important;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .about-rhythm__panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white-050);
}

.page-about .about-rhythm__panel > p {
  color: rgba(243, 235, 221, 0.78);
  font-size: 15px;
  line-height: 1.76;
}

.page-about .about-cats {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-about .about-cats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-left: 3px solid var(--cyan-400);
  background: rgba(46, 217, 206, 0.09);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--sand-100);
}

.page-about .about-cats span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-about .about-rhythm__now {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 22px 0 0 !important;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}

.page-about .about-rhythm__now span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(243, 235, 221, 0.6);
}

.page-about .about-rhythm__now strong {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 26px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--coral-500);
}

.page-about .about-rhythm__fig {
  position: relative;
  margin: 0;
  align-self: start;
  border: 3px solid var(--ink-950);
  background: var(--abyss-950);
  overflow: hidden;
  box-shadow: 8px 8px 0 0 var(--abyss-800);
}

@media (min-width: 900px) {
  .page-about .about-rhythm {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

/* ---------- 服务对象 ---------- */

.page-about .about-who {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-who li {
  position: relative;
  padding: 20px 22px;
  border: 2px solid var(--ink-950);
  background: var(--fog-200);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-who li:nth-child(even) {
  background: var(--white-050);
}

@media (hover: hover) {
  .page-about .about-who li:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 0 var(--abyss-950);
  }
}

.page-about .about-who__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--coral-500);
}

.page-about .about-who h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--abyss-950);
}

.page-about .about-who p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-soft);
  max-width: none;
}

@media (min-width: 760px) {
  .page-about .about-who {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 团队与承诺 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(20px, 2.8vw, 32px);
}

.page-about .about-team article {
  padding-top: 16px;
  border-top: 4px solid var(--ink-950);
}

.page-about .about-team__role {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--tide-600);
}

.page-about .about-team h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--abyss-950);
}

.page-about .about-team p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--about-soft);
  max-width: none;
}

.page-about .about-promise {
  margin-top: clamp(26px, 3.6vw, 42px);
  padding: clamp(20px, 3vw, 32px);
  border: 2px solid var(--ink-950);
  border-left: 8px solid var(--coral-500);
  background: var(--white-050);
}

.page-about .about-promise__kicker {
  margin: 0 0 8px !important;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral-500);
}

.page-about .about-promise__text {
  margin: 0 !important;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.8;
  color: var(--abyss-800);
  max-width: 68ch;
}

.page-about .about-promise__text a {
  color: var(--tide-600);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-word;
}

.page-about .about-promise__text a:hover,
.page-about .about-promise__text a:focus-visible {
  color: var(--coral-500);
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 继续查看 ---------- */

.page-about .about-next {
  margin-top: clamp(48px, 7vw, 90px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 3px solid var(--ink-950);
  display: grid;
  gap: 10px;
}

.page-about .about-next a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--ink-950);
  background: var(--white-050);
  color: var(--ink-950);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  background: var(--abyss-800);
  color: var(--cyan-400);
  transform: translateY(-2px);
}

@media (min-width: 700px) {
  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump a,
  .page-about .about-next a,
  .page-about .about-who li {
    transition: none;
  }

  .page-about .about-jump a:hover,
  .page-about .about-next a:hover,
  .page-about .about-who li:hover {
    transform: none;
  }
}