.page-about {
  --about-rail: 2px;
  --about-gap: clamp(18px, 3.4vw, 32px);
  background: var(--space);
  color: var(--silver);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3.5vw, 34px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(26px, 5vw, 54px);
  padding-bottom: clamp(46px, 8vw, 94px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -110px;
  right: -140px;
  width: min(480px, 68vw);
  height: min(480px, 68vw);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(139, 123, 216, .22), rgba(111, 211, 217, .10) 46%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

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

.page-about .about-hero__body {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .display {
  margin: 0;
  max-width: 16em;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.24;
  letter-spacing: .03em;
  font-weight: 700;
  color: var(--silver);
}

.page-about .lede {
  margin: 0;
  max-width: 36em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--dim);
}

.page-about .prose {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--dim);
}

.page-about .prose a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 169, 74, .45);
}

.page-about .prose a:hover,
.page-about .prose a:focus-visible {
  color: #e8bf6b;
  border-bottom-color: #e8bf6b;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 54px);
    align-items: start;
  }

  .page-about .about-hero__kicker {
    padding-top: 16px;
  }
}

/* ---------- 序号元件 ---------- */

.page-about .about-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .about-idx-label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--dimmer);
}

.page-about .section--paper .about-idx {
  color: var(--eclipse);
}

.page-about .h2 {
  margin: 0 0 clamp(12px, 2vw, 20px);
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.4;
  letter-spacing: .04em;
  font-weight: 600;
  color: var(--silver);
}

.page-about .h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.5;
  letter-spacing: .03em;
  font-weight: 600;
  color: var(--silver);
}

/* ---------- 01 起点 ---------- */

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

.page-about .about-origin__grid {
  display: grid;
  gap: var(--about-gap);
}

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

.page-about .about-origin__index .about-idx-label {
  margin-top: 0;
}

.page-about .about-origin__main {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-origin__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-origin__aside .note {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: var(--about-rail) solid var(--gold);
  border-radius: 4px;
  background: rgba(15, 36, 64, .72);
  font-size: 14px;
  line-height: 1.75;
  color: var(--dim);
}

.page-about .about-origin__aside .note p {
  margin: 0;
}

.page-about .about-note__title {
  margin-bottom: 6px !important;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: 108px minmax(0, 1fr) minmax(220px, 292px);
    column-gap: clamp(28px, 4vw, 54px);
    align-items: start;
  }

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

  .page-about .about-origin__index .about-idx-label {
    margin-top: 10px;
  }
}

/* ---------- 02 五个阶段 ---------- */

.page-about .about-stages {
  padding-block: clamp(48px, 8vw, 100px);
}

.page-about .about-stages__head {
  display: grid;
  gap: 12px;
  max-width: 44em;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-stages__head .h2 {
  margin: 0;
}

.page-about .about-stages__figure {
  margin: 0 0 clamp(34px, 5vw, 58px);
}

.page-about .about-stages__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(111, 211, 217, .12), rgba(139, 123, 216, .16));
}

.page-about .about-stages__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--dimmer);
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 42px;
  padding-bottom: clamp(26px, 3.6vw, 40px);
  scroll-margin-top: 96px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(42, 59, 82, .18));
}

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

.page-about .about-tl__item:last-child::before {
  display: none;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 1px;
  top: 4px;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--line);
  background: var(--midnight);
}

.page-about .about-tl__dot--1 {
  background: var(--space);
  box-shadow: inset 0 0 0 1.5px var(--line);
}

.page-about .about-tl__dot--2 {
  background: linear-gradient(100deg, var(--midnight) 0 62%, var(--silver) 62% 100%);
}

.page-about .about-tl__dot--3 {
  background: linear-gradient(100deg, var(--midnight) 0 48%, var(--silver) 48% 100%);
}

.page-about .about-tl__dot--4 {
  background: linear-gradient(100deg, var(--midnight) 0 24%, var(--silver) 24% 100%);
}

.page-about .about-tl__dot--5 {
  background: radial-gradient(circle at 34% 32%, #FFFDF6, var(--silver) 58%, #C9D5E4 100%);
  box-shadow: 0 0 0 4px rgba(216, 169, 74, .16), 0 0 20px rgba(139, 123, 216, .48);
}

.page-about .about-tl__item:target .about-tl__dot {
  box-shadow: 0 0 0 4px rgba(216, 169, 74, .28);
}

.page-about .about-tl__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 6px;
}

.page-about .about-tl__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--dimmer);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-tl__body p:not(.about-tl__meta) {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px, 1.55vw, 16.5px);
  line-height: 1.85;
  color: var(--dim);
}

/* ---------- 03 运营方式（纸页） ---------- */

.page-about .about-ops {
  padding-block: clamp(48px, 8vw, 100px);
  color: var(--ink);
}

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

.page-about .about-ops .lede {
  color: rgba(44, 36, 29, .76);
}

.page-about .about-ops__head {
  display: grid;
  gap: 12px;
  max-width: 42em;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-about .about-ops__head .h2 {
  margin: 0;
}

.page-about .about-ops__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

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

.page-about .about-ops__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid rgba(44, 36, 29, .16);
  background: linear-gradient(155deg, rgba(184, 84, 60, .10), rgba(216, 169, 74, .18));
}

.page-about .about-ops__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: rgba(44, 36, 29, .6);
}

.page-about .about-ops__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-ops__item {
  padding: 18px 0;
  border-top: 1px solid rgba(44, 36, 29, .16);
}

.page-about .about-ops__item:first-child {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}

.page-about .about-ops__cycle {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 10px;
  border: 1px solid rgba(44, 36, 29, .26);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--ink);
}

.page-about .about-ops .h3 {
  color: var(--ink);
}

.page-about .about-ops__item p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(44, 36, 29, .74);
}

.page-about .about-ops__more {
  margin-top: clamp(26px, 4vw, 40px);
  max-width: 44em;
}

.page-about .about-ops__more .disclose {
  border-top: 1px solid rgba(44, 36, 29, .2);
  border-bottom: 1px solid rgba(44, 36, 29, .2);
}

.page-about .about-ops__more .disclose__btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  background: none;
  border: 0;
  text-align: left;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
}

.page-about .about-ops__more .disclose__caret {
  font-family: var(--font-mono);
  color: var(--eclipse);
  flex: none;
}

.page-about .about-ops__more .disclose__panel {
  padding: 0 0 18px;
}

.page-about .about-ops__more .disclose__panel p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(44, 36, 29, .76);
}

.page-about .about-ops__more .disclose__btn:focus-visible {
  outline: 2px solid var(--eclipse);
  outline-offset: 2px;
}

@media (min-width: 860px) {
  .page-about .about-ops__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 04 规模 ---------- */

.page-about .about-scope {
  padding-block: clamp(48px, 8vw, 100px);
}

.page-about .about-scope__head {
  display: grid;
  gap: 12px;
  max-width: 40em;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-scope__head .h2 {
  margin: 0;
}

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

.page-about .about-scale__item {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  column-gap: 16px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-scale__text strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--silver);
}

.page-about .about-scale__text p {
  margin: 0;
  max-width: 30em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .about-scope__link {
  margin-top: clamp(24px, 4vw, 38px);
  max-width: 42em;
}

@media (min-width: 760px) {
  .page-about .about-scale {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scale__item {
    grid-template-columns: 1fr;
    row-gap: 10px;
    border-bottom: 0;
    border-top: 0;
    padding: 4px clamp(12px, 2vw, 24px) 4px 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-scale__item:last-child {
    border-right: 0;
  }

  .page-about .about-scale__item:first-child {
    padding-left: 0;
  }
}

/* ---------- 05 反馈 ---------- */

.page-about .about-talk {
  padding-block: clamp(48px, 8vw, 100px);
}

.page-about .about-talk__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-talk__main {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
  align-content: start;
}

.page-about .about-talk__main .h2 {
  margin: 0;
}

.page-about .about-talk__ways {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 40em;
}

.page-about .about-talk__ways li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .about-talk__ways li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-talk__ways strong {
  color: var(--silver);
  font-weight: 600;
  margin-right: 6px;
}

.page-about .about-talk__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-talk__aside {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(15, 36, 64, .66);
  align-self: start;
}

.page-about .about-talk__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-talk__aside .contact-list__label {
  color: var(--dimmer);
}

.page-about .about-talk__aside .contact-list__value {
  color: var(--silver);
  word-break: break-word;
}

.page-about .about-talk__aside-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--dim);
}

@media (min-width: 900px) {
  .page-about .about-talk__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(250px, .68fr);
    column-gap: clamp(32px, 6vw, 68px);
  }
}

/* ---------- 减弱动态 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero::before {
    background: radial-gradient(circle at 50% 50%, rgba(139, 123, 216, .14), transparent 70%);
  }
}
</main>