.page-about {
  --about-ink: #0D1117;
  --about-deep: #0B3B2E;
  --about-green: #1E7A5A;
  --about-gold: #C9A063;
  --about-gold-light: #E3C78A;
  --about-ivory: #F4EDE4;
  --about-stone: #93A39B;
  --about-mist: #E5EFE9;
  background: var(--about-ink);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-start,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-promise {
  scroll-margin-top: calc(var(--header-offset, 88px) + 24px);
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1100px 420px at 85% -10%, rgba(30, 122, 90, 0.5), transparent 70%),
    linear-gradient(120deg, var(--about-ink) 0%, var(--about-deep) 55%, var(--about-green) 100%);
  padding: calc(var(--header-offset, 88px) + 3rem) 0 0;
  color: var(--about-ivory);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10%;
  width: 44%;
  height: 100%;
  background: linear-gradient(180deg, rgba(201, 160, 99, 0.24), rgba(201, 160, 99, 0.02));
  clip-path: polygon(12% 0, 100% 0, 88% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__breadcrumb {
  position: relative;
  z-index: 1;
  padding-top: 1rem;
}

.page-about .about-hero__breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.86rem;
}

.page-about .about-hero__breadcrumb a {
  color: var(--about-stone);
  text-decoration: none;
}

.page-about .about-hero__breadcrumb a:hover {
  color: var(--about-gold-light);
}

.page-about .about-hero__breadcrumb li + li::before {
  content: "·";
  margin: 0 0.4rem 0 0.2rem;
  color: var(--about-stone);
}

.page-about .about-hero__breadcrumb [aria-current="page"] {
  color: var(--about-gold-light);
  font-weight: 600;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.5rem;
  align-items: end;
  padding-bottom: 3rem;
}

.page-about .about-hero h1 {
  margin: 1.5rem 0 1.25rem;
  font-size: clamp(2rem, 5.5vw, 3.8rem);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--about-ivory);
}

.page-about .about-hero__lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--about-ivory);
  max-width: 46ch;
  margin: 0;
}

.page-about .about-hero__declaration {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 4px solid var(--about-gold);
  color: var(--about-gold-light);
  font-weight: 600;
  max-width: 52ch;
}

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

.page-about .about-hero__frame {
  position: relative;
  max-width: 100%;
  border-radius: 24px 8px 24px 8px;
  overflow: hidden;
  transform: rotate(1.2deg);
  border: 1px solid rgba(201, 160, 99, 0.35);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-hero__stats {
  position: relative;
  border-top: 1px solid rgba(201, 160, 99, 0.28);
  border-bottom: 1px solid rgba(201, 160, 99, 0.28);
  background: rgba(244, 237, 228, 0.07);
  backdrop-filter: blur(10px);
  padding: 1.25rem 0;
}

.page-about .about-hero__stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 1.25rem;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-hero__stat .stat-value {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--about-gold);
  font-weight: 900;
  line-height: 1.1;
}

.page-about .about-hero__stat .stat-label {
  color: var(--about-stone);
  font-size: 0.9rem;
}

@media (max-width: 480px) {
  .page-about .about-hero__frame {
    transform: rotate(0deg);
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
  }

  .page-about .about-hero h1 {
    font-size: clamp(3rem, 5vw, 4.6rem);
  }
}

/* ===== 目录 ===== */
.page-about .about-toc {
  background: var(--about-ink);
  border-bottom: 1px solid rgba(201, 160, 99, 0.25);
}

.page-about .about-toc__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 0.9rem 0;
}

.page-about .about-toc__label {
  font-size: 0.8rem;
  color: var(--about-stone);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-toc__inner a {
  position: relative;
  color: var(--about-ivory);
  text-decoration: none;
  font-weight: 500;
  padding: 0.25rem 0;
}

.page-about .about-toc__inner a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--about-gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease, cubic-bezier(0.22, 1, 0.36, 1));
}

.page-about .about-toc__inner a:hover::after,
.page-about .about-toc__inner a:focus-visible::after {
  transform: scaleX(1);
}

/* ===== 品牌起点 ===== */
.page-about .about-start {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0;
  background: linear-gradient(90deg, var(--about-deep) 0%, var(--about-ink) 100%);
  color: var(--about-ivory);
}

.page-about .about-start::before {
  content: "01";
  position: absolute;
  right: -0.15em;
  bottom: -0.25em;
  font-size: clamp(10rem, 24vw, 20rem);
  font-weight: 900;
  line-height: 1;
  color: rgba(201, 160, 99, 0.1);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .about-start__inner {
  position: relative;
  z-index: 1;
  max-width: 840px;
  margin: 0 auto;
}

.page-about .about-start .section-title {
  margin: 0 0 1.5rem;
}

.page-about .about-start .kicker {
  color: var(--about-gold-light);
}

.page-about .about-start__lead {
  font-size: 1.25rem;
  line-height: 1.8;
  font-weight: 500;
  color: var(--about-ivory);
}

.page-about .about-start p {
  color: var(--about-stone);
  line-height: 1.8;
  margin: 1rem 0;
}

.page-about .about-start p:last-of-type {
  margin-bottom: 1.75rem;
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  background: var(--about-mist);
  color: var(--about-ink);
  padding: 4.5rem 0 3rem;
  position: relative;
}

.page-about .about-timeline .section-title {
  color: var(--about-ink);
}

.page-about .about-timeline .kicker {
  color: var(--about-deep);
  font-weight: 700;
}

.page-about .about-timeline__intro {
  max-width: 60ch;
  color: #2f3d36;
  line-height: 1.75;
  margin-bottom: 0;
}

.page-about .about-timeline__list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 3rem 0 2rem;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(4.5rem, 0.4fr) 1fr;
  gap: 1rem 1.25rem;
  align-items: start;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 20px;
  border: 1px solid rgba(11, 59, 46, 0.12);
  box-shadow: 0 12px 32px rgba(13, 17, 23, 0.08);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: 0.9;
  font-weight: 900;
  color: var(--about-gold);
  letter-spacing: -0.03em;
  transform: skewX(-6deg);
  background: rgba(13, 17, 23, 0.88);
  padding: 0.85rem 0.9rem;
  border-radius: 8px 18px 8px 18px;
  box-shadow: 0 6px 18px rgba(13, 17, 23, 0.14);
}

.page-about .about-timeline__card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--about-deep);
}

.page-about .about-timeline__card p {
  margin: 0;
  line-height: 1.7;
  color: #2f3d36;
}

.page-about .about-timeline__footer {
  padding-top: 0.5rem;
}

.page-about .about-timeline .btn--ghost {
  border: 1px solid var(--about-deep);
  color: var(--about-deep);
  background: transparent;
}

@media (min-width: 860px) {
  .page-about .about-timeline__item {
    padding: 1.75rem;
    grid-template-columns: 0.6fr 1.4fr;
  }

  .page-about .about-timeline__item:nth-child(even) {
    grid-template-columns: 1.4fr 0.6fr;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    order: 2;
    justify-self: end;
    transform: skewX(6deg);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    order: 1;
  }
}

/* ===== 数据与团队 ===== */
.page-about .about-team {
  background: var(--about-ink);
  color: var(--about-ivory);
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-team__head {
  margin-bottom: 2.5rem;
}

.page-about .about-team__head .section-title {
  max-width: 18ch;
}

.page-about .about-team__intro {
  color: var(--about-stone);
  margin-top: 0.75rem;
  line-height: 1.7;
}

.page-about .about-team__grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.page-about .about-team__text p {
  color: var(--about-stone);
  line-height: 1.8;
  margin: 0 0 1rem;
}

.page-about .about-team__process {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(201, 160, 99, 0.25);
  padding-top: 1.5rem;
}

.page-about .about-team__process-item {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1rem;
  row-gap: 0.25rem;
  align-items: baseline;
  padding: 0.9rem 1.1rem;
  background: rgba(244, 237, 228, 0.06);
  border-radius: 14px;
  border-left: 3px solid var(--about-gold);
}

.page-about .about-team__step {
  grid-row: span 2;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--about-gold);
  line-height: 1;
}

.page-about .about-team__label {
  font-weight: 700;
  color: var(--about-ivory);
  font-size: 0.95rem;
}

.page-about .about-team__desc {
  grid-column: 2;
  color: var(--about-stone);
  font-size: 0.9rem;
}

.page-about .about-team__media {
  min-width: 0;
}

.page-about .about-team__figure,
.page-about .about-team__collab-media {
  margin: 0;
  background: rgba(244, 237, 228, 0.06);
  border-radius: 18px;
  padding: 0.75rem;
  border: 1px solid rgba(201, 160, 99, 0.2);
}

.page-about .about-team__figure img,
.page-about .about-team__collab-media img {
  display: block;
  width: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.page-about .about-team__figure figcaption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--about-stone);
  padding-top: 0.75rem;
}

.page-about .about-team__collab {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  margin-top: 3.5rem;
  padding-top: 3.5rem;
  border-top: 1px solid rgba(201, 160, 99, 0.2);
}

.page-about .about-team__collab-text h3 {
  margin: 0 0 1rem;
  font-size: 1.75rem;
  color: var(--about-gold-light);
  font-weight: 800;
}

.page-about .about-team__collab-text p {
  color: var(--about-stone);
  line-height: 1.8;
  margin: 0 0 1rem;
}

.page-about .about-team .btn--ghost {
  border: 1px solid var(--about-gold);
  color: var(--about-gold-light);
  background: transparent;
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }

  .page-about .about-team__collab {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 3.5rem;
  }
}

/* ===== 承诺 ===== */
.page-about .about-promise {
  background: var(--about-ivory);
  color: var(--about-ink);
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-promise::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: rgba(201, 160, 99, 0.25);
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

.page-about .about-promise .section-title {
  color: var(--about-ink);
}

.page-about .about-promise .kicker {
  color: var(--about-deep);
  font-weight: 700;
}

.page-about .about-promise__lead {
  max-width: 60ch;
  color: #2f3d36;
  margin-bottom: 2.5rem;
  line-height: 1.75;
}

.page-about .about-promise__panel {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(201, 160, 99, 0.35);
  border-radius: 24px;
  backdrop-filter: blur(12px);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem 1.5rem;
  margin-top: 2rem;
}

.page-about .about-promise__card {
  padding: 1.5rem 1.25rem 1.25rem;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 16px;
  border-top: 3px solid var(--about-gold);
  box-shadow: 0 8px 24px rgba(13, 17, 23, 0.05);
  transition: transform 0.3s var(--ease, cubic-bezier(0.22, 1, 0.36, 1)), box-shadow 0.3s var(--ease, cubic-bezier(0.22, 1, 0.36, 1));
}

.page-about .about-promise__card:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 40px rgba(13, 17, 23, 0.1);
}

.page-about .about-promise__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.4rem;
  background: var(--about-deep);
  color: var(--about-gold-light);
  border-radius: 12px;
  margin-bottom: 1rem;
}

.page-about .about-promise__card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--about-deep);
}

.page-about .about-promise__card p {
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
  color: #2f3d36;
}

.page-about .about-promise__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-promise .btn--primary {
  background: linear-gradient(135deg, var(--about-gold), var(--about-gold-light));
  color: var(--about-ink);
  border: none;
}

.page-about .about-promise .btn--ghost {
  border: 1px solid var(--about-deep);
  color: var(--about-deep);
  background: transparent;
}

@media (min-width: 700px) {
  .page-about .about-promise__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1000px) {
  .page-about .about-promise__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}