.page-about {
  --about-gutter: clamp(20px, 5vw, 56px);
  --about-rule: rgba(201, 162, 39, 0.22);
  --about-panel: rgba(21, 17, 13, 0.6);
  display: block;
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(201, 162, 39, 0.12), transparent 62%),
    radial-gradient(900px 520px at -10% 42%, rgba(79, 209, 197, 0.06), transparent 60%),
    var(--felt);
  color: var(--cream);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .wrap {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

/* ---------- 面包屑与页头 ---------- */

.page-about .breadcrumbs {
  padding-top: calc(var(--frame-top) + 18px);
  font-size: 13px;
}

.page-about .about-head {
  padding-top: clamp(20px, 3.4vw, 42px);
  padding-bottom: clamp(26px, 4vw, 50px);
}

.page-about .about-head .index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-h1 {
  margin: 0.3em 0 0;
  max-width: 15ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.6vw, 100px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-h1 em {
  font-style: normal;
  color: var(--gold-bright);
}

.page-about .about-lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 48ch;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-head-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 首屏整宽图 ---------- */

.page-about .about-hero {
  margin: 0 auto clamp(40px, 6vw, 76px);
}

.page-about .about-hero .media-frame {
  overflow: hidden;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, #123329, #091a15);
  box-shadow: 0 30px 64px -34px rgba(0, 0, 0, 0.9);
}

.page-about .about-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */

.page-about .section {
  position: relative;
  padding-block: clamp(42px, 6.6vw, 90px);
}

.page-about .section + .section {
  border-top: 1px solid var(--about-rule);
}

.page-about .section-head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(24px, 3.8vw, 44px);
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 20px);
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.8vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .section-lede {
  margin: 4px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-about .section-head {
    grid-template-columns: 76px minmax(0, 1fr);
    column-gap: clamp(16px, 2.6vw, 30px);
    align-items: start;
  }
  .page-about .section-index {
    grid-column: 1;
    grid-row: 1 / span 2;
  }
  .page-about .section-title,
  .page-about .section-lede {
    grid-column: 2;
  }
}

/* ---------- 01 品牌缘起 ---------- */

.page-about .about-origin-grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

@media (min-width: 900px) {
  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }
}

.page-about .about-quote {
  margin: 0;
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 3px solid var(--gold);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.1vw, 40px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-origin-body p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.92;
  color: var(--mist);
}

.page-about .about-origin-body p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px dashed var(--about-rule);
}

@media (min-width: 620px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-figure-value {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2vw, 25px);
  line-height: 1.2;
  color: var(--gold-bright);
}

.page-about .about-figure-label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 02 三条内容线 ---------- */

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

@media (min-width: 820px) {
  .page-about .about-lines {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-line:nth-child(1) {
    grid-column: span 7;
  }
  .page-about .about-line:nth-child(2) {
    grid-column: span 5;
  }
  .page-about .about-line:nth-child(3) {
    grid-column: span 7;
  }
  .page-about .about-line-media {
    grid-column: span 5;
  }
}

.page-about .about-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  background: linear-gradient(155deg, rgba(21, 17, 13, 0.92), rgba(14, 43, 36, 0.72));
  transition: transform 240ms ease-out, border-color 240ms ease-out;
}

.page-about .about-line .index-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-about .about-line h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.36;
  color: var(--cream);
}

.page-about .about-line p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .about-line a {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 199, 102, 0.45);
}

.page-about .about-line a:hover,
.page-about .about-line a:focus-visible {
  border-bottom-color: var(--gold-bright);
}

.page-about .about-line-media {
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
}

.page-about .about-line-media .media-frame {
  overflow: hidden;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  background: linear-gradient(150deg, #2a1c10, #123329);
}

.page-about .about-line-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

@media (hover: hover) {
  .page-about .about-line:hover {
    transform: translateY(-4px);
    border-color: rgba(201, 162, 39, 0.55);
  }
}

/* ---------- 03 四个阶段 ---------- */

.page-about .stage-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(30px, 5vw, 64px);
}

.page-about .stage-item {
  display: grid;
  gap: 12px;
  padding-top: 4px;
}

@media (min-width: 880px) {
  .page-about .stage-item {
    grid-template-columns: minmax(150px, 236px) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 76px);
    align-items: start;
  }
}

.page-about .stage-marker {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
}

@media (min-width: 880px) {
  .page-about .stage-marker {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    position: sticky;
    top: calc(var(--frame-top) + 26px);
    align-self: start;
  }
}

.page-about .stage-num {
  font-family: var(--font-mono);
  font-size: clamp(46px, 8.6vw, 116px);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--gold);
}

@supports not (-webkit-text-stroke: 1px currentColor) {
  .page-about .stage-num {
    color: var(--gold);
  }
}

.page-about .stage-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .stage-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.3;
  color: var(--cream);
}

.page-about .stage-body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .stage-points {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .stage-points li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cream);
  opacity: 0.88;
}

.page-about .stage-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

/* ---------- 04 团队与分工 ---------- */

.page-about .about-team-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(28px, 4vw, 58px);
    align-items: start;
  }
}

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

.page-about .about-team-media .media-frame {
  overflow: hidden;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  background: linear-gradient(150deg, #0f2620, #1b130d);
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team-roles {
  display: grid;
  gap: 14px;
}

@media (min-width: 620px) {
  .page-about .about-team-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-role {
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-s);
  background: var(--about-panel);
  transition: transform 240ms ease-out, border-color 240ms ease-out;
}

.page-about .about-role-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  border: 1px solid rgba(201, 162, 39, 0.45);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold-bright);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.84;
  color: var(--mist);
}

@media (hover: hover) {
  .page-about .about-role:hover {
    transform: translateY(-4px);
    border-color: rgba(201, 162, 39, 0.55);
  }
}

/* ---------- 05 服务地区 ---------- */

.page-about .about-region-panel {
  padding: clamp(26px, 4.4vw, 58px);
  border-radius: var(--radius-l);
  background: var(--cream);
  color: var(--paper-ink);
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9);
}

.page-about .about-region-panel .section-index {
  color: #8a6a12;
}

.page-about .about-region-panel .section-title {
  color: var(--paper-ink);
}

.page-about .about-region-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

@media (min-width: 880px) {
  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }
}

.page-about .about-region-figures {
  display: grid;
  gap: 16px;
  padding-top: 4px;
}

.page-about .about-region-figure {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(42, 38, 32, 0.16);
}

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

.page-about .about-region-value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1.1;
  color: #8a6a12;
}

.page-about .about-region-label {
  font-size: 13px;
  line-height: 1.6;
  color: #5c5346;
}

.page-about .about-region-copy p {
  margin: 0 0 1em;
  font-size: 15.5px;
  line-height: 1.9;
  color: #42392f;
}

.page-about .about-region-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- 06 协作与生态 ---------- */

.page-about .about-eco-panels {
  display: grid;
  gap: 12px;
}

.page-about .panel {
  overflow: hidden;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  background: var(--about-panel);
}

.page-about .panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--cream);
  cursor: pointer;
  list-style: none;
}

.page-about .panel-head::-webkit-details-marker {
  display: none;
}

.page-about .panel-head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
}

.page-about .panel[open] .panel-head::after {
  content: "–";
}

.page-about .panel-body {
  padding: 16px clamp(16px, 2.4vw, 26px) 22px;
  border-top: 1px solid var(--about-rule);
}

.page-about .panel-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}

/* ---------- 07 长期运营 ---------- */

.page-about .about-longrun-grid {
  display: grid;
  gap: clamp(20px, 3.2vw, 36px);
}

@media (min-width: 880px) {
  .page-about .about-longrun-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

.page-about .about-longrun-lead {
  margin: 0;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid rgba(201, 162, 39, 0.4);
  border-radius: var(--radius-m);
  background: linear-gradient(150deg, rgba(224, 138, 46, 0.14), rgba(14, 43, 36, 0.5));
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-longrun-copy p {
  margin: 0 0 1.1em;
  font-size: 15.5px;
  line-height: 1.92;
  color: var(--mist);
}

.page-about .about-longrun-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- 结尾入口 ---------- */

.page-about .about-next {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-next-panel {
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-l);
  background: linear-gradient(160deg, rgba(21, 17, 13, 0.92), rgba(14, 43, 36, 0.62));
}

.page-about .about-next-panel .index-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-next-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 36px);
  line-height: 1.25;
  color: var(--cream);
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .about-next-actions .btn {
  text-decoration: none;
}

.page-about .to-top {
  margin-top: clamp(20px, 2.6vw, 28px);
  padding: 8px 0;
  border: 0;
  background: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  cursor: pointer;
}

.page-about .to-top:hover,
.page-about .to-top:focus-visible {
  color: var(--gold-bright);
}

/* ---------- 动效收敛 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-role {
    transition: none;
  }
  .page-about .about-line:hover,
  .page-about .about-role:hover {
    transform: none;
  }
}

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 420px) {
  .page-about .about-region-figures {
    gap: 12px;
  }
  .page-about .about-next-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .page-about .about-next-actions .btn {
    text-align: center;
  }
  .page-about .about-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}