/* ===========================================================
   品牌与价值 · /values/
   页面作用域：.page-about
   =========================================================== */

.page-about {
  --about-dim: rgba(34, 26, 20, 0.68);
  --about-dim-dark: rgba(244, 239, 230, 0.72);
  --about-hair-dark: rgba(138, 151, 172, 0.24);
  background: var(--paper);
  color: var(--text);
}

.page-about .headline {
  letter-spacing: 0.05em;
}

/* ----------------------------- 首屏 ----------------------------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 9vw, 116px) 0 clamp(40px, 6vw, 72px);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper) 58%, var(--paper-2) 100%);
}

.page-about .about-hero__wedge {
  position: absolute;
  top: clamp(-340px, -19vw, -130px);
  right: clamp(-300px, -13vw, -90px);
  width: clamp(300px, 44vw, 640px);
  aspect-ratio: 1 / 1;
  background: var(--ink);
  border-radius: 8px;
  transform: rotate(22deg);
  pointer-events: none;
}

.page-about .about-hero__wedge::after {
  content: "";
  position: absolute;
  left: 16%;
  top: -12%;
  width: 2px;
  height: 124%;
  background: var(--amber);
  opacity: 0.55;
}

.page-about .about-hero__title {
  position: relative;
  margin: 20px 0 0;
  max-width: 16ch;
  font-size: clamp(46px, 9.2vw, 106px);
  line-height: 0.96;
  font-weight: 200;
  letter-spacing: -0.035em;
  color: var(--text);
}

.page-about .about-hero__lede {
  position: relative;
  margin: clamp(22px, 3vw, 34px) 0 0;
  max-width: 52ch;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.9;
  color: var(--about-dim);
}

.page-about .about-hero__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .about-hero__index {
  position: relative;
  list-style: none;
  margin: clamp(44px, 6vw, 76px) 0 0;
  padding: clamp(22px, 2.8vw, 30px) 0 0;
  border-top: 1px solid var(--line-paper);
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-hero__index li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__index-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.3vw, 27px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-hero__index-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-dim);
  max-width: 30ch;
}

/* --------------------------- 我们做什么 --------------------------- */

.page-about .about-work {
  background: var(--paper);
  padding: clamp(56px, 8vw, 112px) 0 clamp(58px, 8vw, 110px);
}

.page-about .about-work__grid {
  align-items: start;
  row-gap: clamp(36px, 5vw, 48px);
}

.page-about .about-work__intro {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-dim);
}

.page-about .about-work__list {
  list-style: none;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-paper);
}

.page-about .about-work__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 18px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line-paper);
  transition: transform var(--t-mid) var(--ease);
}

.page-about .about-work__item:hover {
  transform: translateX(4px);
}

.page-about .about-work__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ember);
  transition: color var(--t-fast) var(--ease);
}

.page-about .about-work__item:hover .about-work__no {
  color: var(--text);
}

.page-about .about-work__item h3 {
  margin: 0 0 7px;
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text);
}

.page-about .about-work__item p {
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-dim);
}

.page-about .about-work__media {
  position: relative;
}

.page-about .about-work__figure {
  margin: 0;
  position: relative;
}

.page-about .about-work__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border: 1px solid var(--line-paper);
  box-shadow: 12px 12px 0 var(--paper-2);
}

.page-about .about-work__figure .figure__cap {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--about-dim);
}

/* ---------------------------- 档案脉络 ---------------------------- */

.page-about .about-archive {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(64px, 9vw, 128px) 0;
}

.page-about .about-archive::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg,
      rgba(138, 151, 172, 0.07) 0 1px,
      transparent 1px 104px);
  pointer-events: none;
}

.page-about .about-archive > .wrap {
  position: relative;
}

.page-about .about-archive__head {
  max-width: 62ch;
}

.page-about .about-archive__title {
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-archive__lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-dim-dark);
}

.page-about .about-archive__grid {
  margin-top: clamp(38px, 5vw, 64px);
  row-gap: clamp(34px, 5vw, 48px);
  align-items: start;
}

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

.page-about .about-archive__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--about-hair-dark);
  filter: grayscale(1) contrast(1.06);
  transition: filter var(--t-slow) var(--ease);
}

.page-about .about-archive__figure:hover img {
  filter: grayscale(0.25) contrast(1.04);
}

.page-about .about-archive__figure .figure__cap {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(244, 239, 230, 0.58);
}

.page-about .about-archive__timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
}

.page-about .about-archive__timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg,
      var(--lime) 0%,
      var(--amber) 46%,
      rgba(138, 151, 172, 0.35) 100%);
}

.page-about .about-archive__node {
  position: relative;
  padding-bottom: clamp(24px, 3.2vw, 36px);
}

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

.page-about .about-archive__node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
  transition: transform var(--t-mid) var(--ease),
    background var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease);
}

.page-about .about-archive__node:hover::before {
  transform: scale(1.55);
  background: var(--ember);
  border-color: var(--ember);
}

.page-about .about-archive__stage {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-archive__node h3 {
  margin: 7px 0 8px;
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
  transition: color var(--t-fast) var(--ease);
}

.page-about .about-archive__node:hover h3 {
  color: var(--lime);
}

.page-about .about-archive__node p {
  margin: 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--about-dim-dark);
}

/* --------------------------- 标注与复核 --------------------------- */

.page-about .about-method {
  background: var(--paper);
  padding: clamp(60px, 8vw, 118px) 0;
}

.page-about .about-method__head {
  align-items: start;
  row-gap: 20px;
}

.page-about .about-method__lead {
  margin: clamp(4px, 1vw, 12px) 0 0;
  max-width: 50ch;
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-dim);
}

.page-about .about-method__list {
  margin: clamp(34px, 4.4vw, 54px) 0 0;
  border-top: 1px solid var(--line-paper);
}

.page-about .about-method__item {
  border-bottom: 1px solid var(--line-paper);
}

.page-about .about-method__item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(16px, 2.2vw, 23px) 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-method__item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-method__item summary::before {
  content: "+";
  flex: none;
  width: 16px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--ember);
}

.page-about .about-method__item[open] summary::before {
  content: "–";
}

.page-about .about-method__item summary h3 {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text);
  transition: color var(--t-fast) var(--ease);
}

.page-about .about-method__item summary:hover h3 {
  color: #7a5326;
}

.page-about .about-method__body {
  padding: 0 0 clamp(18px, 2.4vw, 28px) 30px;
}

.page-about .about-method__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--about-dim);
}

.page-about .about-method__figure {
  margin: clamp(38px, 5vw, 66px) 0 0;
}

.page-about .about-method__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--line-paper);
}

.page-about .about-method__figure .figure__cap {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--about-dim);
}

/* ----------------------------- 团队 ----------------------------- */

.page-about .about-team {
  background: var(--ink-2);
  color: var(--paper);
  padding: clamp(60px, 8vw, 118px) 0;
}

.page-about .about-team__grid {
  align-items: start;
  row-gap: clamp(34px, 5vw, 48px);
}

.page-about .about-team__title {
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-team__lede {
  margin: 20px 0 0;
  max-width: 52ch;
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-dim-dark);
}

.page-about .about-team__roles {
  list-style: none;
  margin: clamp(28px, 3.6vw, 42px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .about-team__roles li {
  padding: 15px 0;
  border-bottom: 1px solid var(--about-hair-dark);
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-dim-dark);
}

.page-about .about-team__role {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-team__stat {
  position: relative;
  padding: clamp(26px, 3.4vw, 40px);
  background: rgba(244, 239, 230, 0.05);
  border: 1px solid var(--about-hair-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
}

.page-about .about-team__stat::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 46px;
  height: 46px;
  border-left: 2px solid var(--ember);
  border-top: 2px solid var(--ember);
}

.page-about .about-team__stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(56px, 10vw, 92px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-about .about-team__stat-unit {
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.page-about .about-team__stat-label {
  flex-basis: 100%;
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-dim-dark);
}

/* --------------------------- 长期协作 --------------------------- */

.page-about .about-eco {
  background: var(--paper);
  padding: clamp(58px, 8vw, 112px) 0;
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(30px, 4vw, 50px);
}

.page-about .about-eco__item {
  padding: clamp(24px, 3vw, 36px);
  background: var(--paper-2);
  border: 1px solid var(--line-paper);
  box-shadow: 10px 10px 0 rgba(34, 26, 20, 0.06);
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--ember);
}

.page-about .about-eco__item h3 {
  margin: 12px 0 12px;
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-eco__item p {
  margin: 0;
  max-width: 50ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: var(--about-dim);
}

/* ---------------------------- 价值收尾 ---------------------------- */

.page-about .about-value {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(58px, 8vw, 116px) 0 clamp(64px, 8vw, 120px);
}

.page-about .about-value__title {
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-value__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 2.6vw, 30px) clamp(24px, 3.6vw, 52px);
  margin-top: clamp(32px, 4.2vw, 52px);
}

.page-about .about-value__item {
  padding-top: clamp(18px, 2.2vw, 26px);
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .about-value__item h3 {
  margin: 0 0 10px;
  display: flex;
  gap: 12px;
  font-size: clamp(16.5px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-value__mark {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.9;
  color: var(--lime);
}

.page-about .about-value__item p {
  margin: 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--about-dim-dark);
}

.page-about .about-value__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(36px, 4.6vw, 58px);
  padding-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .about-value__note {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.6);
}

.page-about .about-value__note a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------------------------- 响应式 ---------------------------- */

@media (max-width: 767px) {
  .page-about .about-hero__wedge {
    display: none;
  }

  .page-about .about-hero {
    background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  }

  .page-about .about-hero__index-text {
    max-width: none;
  }

  .page-about .about-work__figure img {
    box-shadow: 8px 8px 0 var(--paper-2);
  }

  .page-about .about-archive__timeline {
    padding-left: 24px;
  }

  .page-about .about-archive__node::before {
    left: -24px;
  }

  .page-about .about-method__body {
    padding-left: 30px;
  }
}

@media (min-width: 700px) {
  .page-about .about-hero__index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px 32px;
  }
}

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

@media (min-width: 900px) {
  .page-about .about-eco__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-eco__item--offset {
    margin-top: clamp(44px, 6vw, 92px);
  }

  .page-about .about-method__body {
    padding-left: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-work__item,
  .page-about .about-archive__node::before,
  .page-about .about-archive__node h3,
  .page-about .about-archive__figure img,
  .page-about .about-work__no {
    transition: none;
  }
}