/* ============ 品牌故事页专属样式 ============ */
.page-about {
  background: var(--ink-900);
  color: var(--text);
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(circle at 80% 18%, rgba(245, 166, 35, 0.18), transparent 34%),
    radial-gradient(circle at 12% 82%, rgba(0, 194, 255, 0.12), transparent 36%),
    linear-gradient(135deg, var(--ink-800) 0%, var(--ink-900) 72%);
}

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

.page-about .about-hero__breadcrumb {
  margin-bottom: 1.25rem;
}

.page-about .about-hero__kicker {
  margin-bottom: 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero h1 {
  max-width: 14em;
  margin-bottom: 1.25rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--text);
}

.page-about .about-hero__intro {
  max-width: 40rem;
  margin-bottom: 1.75rem;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.25rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 26rem;
  margin: 0;
}

.page-about .about-hero__stats > div {
  padding: 0.85rem 1rem;
  background: var(--ink-700);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
}

.page-about .about-hero__stats dt {
  margin-bottom: 0.35rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
}

.page-about .about-hero__stats dd {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.45rem;
  color: var(--gold);
}

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

.page-about .about-hero__figure {
  margin: 0;
  padding: 0.5rem;
  background: var(--ink-700);
  border: 1px solid rgba(245, 230, 200, 0.18);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transform: rotate(0.6deg);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius) - 6px);
  object-fit: cover;
}

.page-about .about-hero__mark {
  position: absolute;
  padding: 0.55rem 1.1rem;
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink-900);
  border: 1px solid rgba(245, 166, 35, 0.5);
  border-radius: 999px;
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__mark--one {
  top: -0.9rem;
  right: 0.75rem;
  color: var(--gold);
}

.page-about .about-hero__mark--two {
  bottom: 1.25rem;
  left: 0.75rem;
  color: var(--blue);
  transform: rotate(-3deg);
}

/* ---- 章节目录 ---- */
.page-about .about-chapters {
  position: sticky;
  top: var(--header-h);
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  background: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.page-about .about-chapters a {
  padding: 0.35rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-2);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-chapters a:hover {
  color: var(--gold);
  border-color: rgba(245, 166, 35, 0.4);
}

/* ---- 章节通用 ---- */
.page-about .about-section {
  position: relative;
  padding: 5rem 0;
  scroll-margin-top: calc(var(--header-h) + 3.5rem);
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2.75rem;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-section:target .about-section__head {
  padding-left: 1rem;
  background: rgba(245, 166, 35, 0.08);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-sm);
}

.page-about .about-section__num {
  flex-shrink: 0;
  min-width: 2ch;
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  line-height: 0.9;
  color: rgba(245, 166, 35, 0.28);
  -webkit-text-stroke: 1.5px rgba(245, 166, 35, 0.7);
  -webkit-text-fill-color: transparent;
}

.page-about .about-section__head-text {
  padding-top: 0.4rem;
}

.page-about .about-section__head-text .section-label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gold);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--text);
}

/* ---- 01 我们的起源 ---- */
.page-about .about-origin {
  display: grid;
  gap: 2.75rem;
}

.page-about .about-origin__text p {
  margin: 0 0 1.1rem;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-origin__text p:first-child {
  font-size: 1.12rem;
  color: var(--text);
}

.page-about .about-origin__text a {
  color: var(--gold);
  text-decoration-color: rgba(245, 166, 35, 0.35);
  text-underline-offset: 4px;
  transition: color var(--dur) var(--ease), text-decoration-color var(--dur) var(--ease);
}

.page-about .about-origin__text a:hover {
  color: var(--gold-soft);
  text-decoration-color: rgba(245, 166, 35, 0.9);
}

.page-about .about-principle {
  margin: 1.75rem 0 0;
  padding: 1.1rem 1.35rem;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--paper);
  background: linear-gradient(90deg, rgba(245, 166, 35, 0.1), transparent 70%);
  border-left: 3px solid var(--gold);
}

.page-about .about-origin__facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.page-about .about-origin__fact {
  padding: 1.35rem 1rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-origin__fact:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-1);
}

.page-about .about-origin__fact--paper {
  background: var(--paper);
  color: var(--ink-900);
}

.page-about .about-origin__fact--gold {
  background: linear-gradient(145deg, rgba(245, 166, 35, 0.24), rgba(245, 166, 35, 0.06));
}

.page-about .about-origin__fact--blue {
  background: linear-gradient(145deg, rgba(0, 194, 255, 0.16), rgba(0, 194, 255, 0.03));
}

.page-about .about-origin__fact-num {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-head);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--text);
}

.page-about .about-origin__fact--paper .about-origin__fact-num {
  color: var(--ink-900);
}

.page-about .about-origin__fact-label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
}

.page-about .about-origin__fact--paper .about-origin__fact-label {
  color: rgba(11, 14, 20, 0.75);
}

/* ---- 02 发展里程碑 ---- */
.page-about .about-section--milestones {
  background: linear-gradient(180deg, transparent, rgba(0, 194, 255, 0.035) 28%, transparent 72%);
}

.page-about .about-milestones {
  display: grid;
  gap: 2.5rem;
}

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

.page-about .about-timeline__deco {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.28;
  pointer-events: none;
}

.page-about .about-timeline__rail {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-left: 1.25rem;
}

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 2.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(0, 194, 255, 0.9) 100%);
  border-radius: 2px;
  opacity: 0.5;
}

.page-about .about-timeline__item {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.15rem;
  align-items: start;
  padding: 0.5rem 0;
}

.page-about .about-timeline__dot {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--gold);
}

.page-about .about-timeline__item:nth-child(2) .about-timeline__dot {
  color: var(--blue);
}

.page-about .about-timeline__item:nth-child(3) .about-timeline__dot {
  color: var(--gold-soft);
}

.page-about .about-timeline__body {
  padding: 1.35rem 1.4rem;
  background: var(--ink-700);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__body,
.page-about .about-timeline__item:focus-within .about-timeline__body {
  transform: translateX(4px);
  border-color: rgba(245, 166, 35, 0.65);
  box-shadow: var(--shadow-1);
}

.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.2rem 0.7rem;
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--ink-900);
  background: var(--paper);
  border-radius: 3px;
}

.page-about .about-timeline__year--blue {
  color: var(--ink-900);
  background: var(--blue);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-head);
  font-size: 1.35rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-milestones__figure,
.page-about .about-data__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-milestones__figure {
  border-color: rgba(0, 194, 255, 0.25);
}

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

.page-about .about-milestones__figure .figure__caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 2.5rem 1rem 0.8rem;
  font-size: 0.8rem;
  color: var(--paper);
  background: linear-gradient(180deg, transparent, rgba(11, 14, 20, 0.85));
}

/* ---- 03 焕新版升级亮点 ---- */
.page-about .about-section--upgrade {
  background: radial-gradient(circle at 85% 30%, rgba(245, 166, 35, 0.1), transparent 42%);
}

.page-about .about-upgrade__banner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1.1rem 1.4rem;
  background: linear-gradient(90deg, rgba(245, 166, 35, 0.14), rgba(0, 194, 255, 0.08));
  border: 1px solid rgba(245, 166, 35, 0.35);
  border-radius: var(--radius);
}

.page-about .about-upgrade__banner-text {
  flex: 1 1 14rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-upgrade__banner-text strong {
  font-size: 1.4rem;
  color: var(--gold);
}

.page-about .about-upgrade__bar {
  flex: 1 1 100%;
  height: 8px;
  overflow: hidden;
  background: var(--ink-600);
  border-radius: 999px;
}

.page-about .about-upgrade__bar-fill {
  display: block;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--blue));
  border-radius: inherit;
}

.page-about .about-upgrade__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-upgrade__col {
  padding: 1.4rem 1.4rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.page-about .about-upgrade__col--old {
  background: var(--ink-700);
}

.page-about .about-upgrade__col--new {
  background: linear-gradient(145deg, rgba(245, 166, 35, 0.08), rgba(245, 166, 35, 0.015));
  border-color: rgba(245, 166, 35, 0.45);
  box-shadow: var(--shadow-1);
}

.page-about .about-upgrade__colhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-upgrade__colhead span {
  font-family: var(--font-head);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}

.page-about .about-upgrade__col--old .about-upgrade__colhead span {
  color: var(--text-2);
}

.page-about .about-upgrade__col--new .about-upgrade__colhead span {
  color: var(--gold);
}

.page-about .about-upgrade__col ul {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-upgrade__col li {
  position: relative;
  padding-left: 1.3rem;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--text-2);
}

.page-about .about-upgrade__col--new li {
  color: var(--text);
}

.page-about .about-upgrade__col li::before {
  content: "";
  position: absolute;
  top: 0.58em;
  left: 0;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 1px;
  transform: rotate(45deg);
}

.page-about .about-upgrade__col--old li::before {
  background: rgba(160, 176, 192, 0.5);
}

.page-about .about-upgrade__col--new li::before {
  background: var(--gold);
}

.page-about .about-upgrade__vs {
  display: grid;
  place-items: center;
  height: 2.5rem;
  font-family: var(--font-head);
  font-size: 1.5rem;
  color: var(--gold);
}

/* ---- 04 数据与团队 ---- */
.page-about .about-data {
  display: grid;
  gap: 2.5rem;
}

.page-about .about-data__intro p {
  margin: 0 0 1.1rem;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-data__intro p:first-child {
  color: var(--text);
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.page-about .about-stat {
  padding: 1.5rem 1.25rem;
  text-align: center;
  background: var(--ink-700);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-stat:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.page-about .about-stat__num {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 4.5vw, 2.6rem);
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-stat:nth-child(2) .about-stat__num {
  color: var(--blue);
}

.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--paper);
}

.page-about .about-stat__label {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
}

.page-about .about-data__figure .figure__caption {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--text-2);
  background: rgba(0, 0, 0, 0.25);
}

/* ---- 05 我们的承诺 ---- */
.page-about .about-section--promise {
  padding-bottom: 6rem;
  background: linear-gradient(180deg, rgba(245, 166, 35, 0.05), transparent 32%);
}

.page-about .about-promise {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-promise__card {
  position: relative;
  padding: 1.8rem 1.5rem 1.6rem;
  background: var(--ink-700);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-promise__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-1);
}

.page-about .about-promise__card--gold {
  border-top: 3px solid var(--gold);
}

.page-about .about-promise__card--blue {
  border-top: 3px solid var(--blue);
}

.page-about .about-promise__card--paper {
  border-top: 3px solid var(--paper);
}

.page-about .about-promise__tag {
  display: inline-block;
  margin-bottom: 0.8rem;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-head);
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  background: rgba(245, 166, 35, 0.12);
  border-radius: 4px;
}

.page-about .about-promise__card--blue .about-promise__tag {
  background: rgba(0, 194, 255, 0.13);
}

.page-about .about-promise__card--paper .about-promise__tag {
  color: var(--ink-900);
  background: var(--paper);
}

.page-about .about-promise__card p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-promise__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

/* ---- 桌面端断点 ---- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 6.5rem 0 4.5rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 4rem;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-origin {
    grid-template-columns: 1.3fr 1fr;
    gap: 4rem;
    align-items: start;
  }

  .page-about .about-milestones {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3.5rem;
    align-items: center;
  }

  .page-about .about-upgrade__grid {
    grid-template-columns: 1fr auto 1.15fr;
    gap: 0.9rem;
    align-items: stretch;
  }

  .page-about .about-upgrade__vs {
    height: auto;
  }

  .page-about .about-data {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-data__figure {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .page-about .about-data__intro {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-data__stats {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .about-promise {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__inner {
    gap: 5rem;
  }

  .page-about .about-section {
    padding: 6.5rem 0;
  }
}