.page-about {
  --about-panel: rgba(18, 58, 92, 0.5);
  --about-panel-deep: rgba(13, 39, 66, 0.9);
  --about-gap: clamp(22px, 4vw, 52px);
  --about-flow: clamp(44px, 7vw, 96px);
  background: var(--db-space);
  color: var(--db-white);
}

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

/* ---------- 面包屑 ---------- */
.page-about .db-breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(24px, 5vw, 64px) 0 clamp(34px, 6vw, 76px);
  background:
    radial-gradient(760px 460px at 88% -12%, rgba(23, 212, 160, 0.18), transparent 60%),
    radial-gradient(560px 380px at 2% 22%, rgba(18, 58, 92, 0.9), transparent 72%),
    var(--db-space);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(143, 169, 196, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 169, 196, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(74% 62% at 46% 34%, #000 0%, transparent 100%);
  mask-image: radial-gradient(74% 62% at 46% 34%, #000 0%, transparent 100%);
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  color: var(--db-mist);
}

.page-about .about-hero__title {
  margin: clamp(14px, 2.4vw, 24px) 0 0;
  font-size: clamp(34px, 7vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 800;
  max-width: 17ch;
}

.page-about .about-hero__accent {
  display: inline-block;
  transform: skewX(-7deg);
  color: var(--db-green);
  text-shadow: 0 0 34px rgba(57, 255, 136, 0.35);
}

.page-about .about-hero__body {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  color: var(--db-white);
}

.page-about .about-hero__side {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(57, 255, 136, 0.4);
  font-size: 15px;
  line-height: 1.7;
  color: var(--db-mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: var(--db-line-soft);
  overflow: hidden;
}

.page-about .about-stats__cell {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  background: linear-gradient(150deg, rgba(18, 58, 92, 0.55), rgba(7, 26, 47, 0.92));
}

.page-about .about-stats__num {
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--db-green);
}

.page-about .about-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--db-mist);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

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

.page-about .about-origin__copy p {
  max-width: 60ch;
  color: rgba(232, 244, 255, 0.86);
}

.page-about .about-origin__copy .db-h2 {
  margin-bottom: 16px;
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(24px, 3.5vw, 40px);
}

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

.page-about .about-timeline__list {
  position: relative;
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(57, 255, 136, 0.6), rgba(255, 122, 26, 0.5) 58%, rgba(143, 169, 196, 0.08));
}

.page-about .about-step {
  position: relative;
  padding-left: 26px;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--db-space);
  border: 2px solid var(--db-mist);
  transition: border-color 0.3s var(--db-ease), background-color 0.3s var(--db-ease), box-shadow 0.3s var(--db-ease);
}

.page-about .about-step:hover::before,
.page-about .about-step:focus-within::before {
  border-color: var(--db-green);
  background: var(--db-green);
  box-shadow: 0 0 0 5px rgba(57, 255, 136, 0.14);
}

.page-about .about-node {
  padding: 16px 18px;
  border: 1px solid var(--db-line-soft);
  border-left: 3px solid rgba(57, 255, 136, 0.32);
  border-radius: 0 var(--db-r-m) var(--db-r-m) 0;
  background: linear-gradient(120deg, rgba(18, 58, 92, 0.6), rgba(13, 39, 66, 0.92));
  transition: border-color 0.3s var(--db-ease), background-color 0.3s var(--db-ease), transform 0.3s var(--db-ease);
}

.page-about .about-step:hover .about-node,
.page-about .about-step:focus-within .about-node {
  border-left-color: var(--db-green);
  transform: translateX(3px);
}

.page-about .about-step:focus-within {
  outline: none;
}

.page-about .about-node__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--db-orange);
}

.page-about .about-node__title {
  margin: 8px 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--db-white);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(232, 244, 255, 0.82);
}

.page-about .about-node__more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  margin-top: 0;
  transition: grid-template-rows 0.35s var(--db-ease), opacity 0.28s var(--db-ease), margin-top 0.35s var(--db-ease);
}

.page-about .about-node__more > p {
  overflow: hidden;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--db-mist);
}

.page-about .about-step:hover .about-node__more,
.page-about .about-step:focus-within .about-node__more {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 10px;
}

.page-about .about-timeline__figure {
  margin: 0;
  align-self: start;
}

/* ---------- 媒体容器 ---------- */
.page-about .db-media {
  display: grid;
  gap: 10px;
}

.page-about .db-media__frame {
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(18, 58, 92, 0.7), rgba(7, 26, 47, 0.92));
}

.page-about .db-media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .db-media__caption {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--db-mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

.page-about .about-team__head {
  margin-bottom: clamp(22px, 3.2vw, 36px);
}

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

.page-about .about-team__copy p {
  max-width: 58ch;
  color: rgba(232, 244, 255, 0.86);
}

.page-about .about-team__facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: var(--db-line-soft);
  overflow: hidden;
}

.page-about .about-fact {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--about-panel-deep);
}

.page-about .about-fact__key {
  font-size: 26px;
  font-weight: 700;
  color: var(--db-teal);
}

.page-about .about-fact__val {
  font-size: 14px;
  line-height: 1.6;
  color: var(--db-mist);
}

/* ---------- 协作与荣誉 ---------- */
.page-about .about-eco {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

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

.page-about .about-eco__main p {
  max-width: 58ch;
  color: rgba(232, 244, 255, 0.86);
}

.page-about .about-eco__nums {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__num {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: var(--about-panel);
}

.page-about .about-eco__num .db-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--db-green);
}

.page-about .about-eco__side .db-h3 {
  margin-bottom: 14px;
}

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

.page-about .about-honor {
  padding: 16px 18px;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: linear-gradient(150deg, rgba(18, 58, 92, 0.42), rgba(7, 26, 47, 0.86));
  transition: border-color 0.3s var(--db-ease), transform 0.3s var(--db-ease);
}

.page-about .about-honor:hover {
  border-color: rgba(255, 181, 71, 0.5);
  transform: translateY(-2px);
}

.page-about .about-honor__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--db-mist);
}

/* ---------- 区域布局 ---------- */
.page-about .about-region {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

.page-about .about-region__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-region__map {
  position: relative;
  margin: 0;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-l);
  overflow: hidden;
  background:
    radial-gradient(60% 60% at 50% 45%, rgba(23, 212, 160, 0.14), transparent 70%),
    linear-gradient(160deg, rgba(18, 58, 92, 0.6), rgba(7, 26, 47, 0.95));
}

.page-about .about-region__map img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.68;
  mix-blend-mode: screen;
}

.page-about .about-region__copy p {
  max-width: 56ch;
  color: rgba(232, 244, 255, 0.86);
}

.page-about .about-region__points {
  display: grid;
  gap: 14px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-region__point {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-region__dot {
  margin-top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--db-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, 0.14);
}

.page-about .about-region__dot--teal {
  background: var(--db-teal);
  box-shadow: 0 0 0 4px rgba(23, 212, 160, 0.16);
}

.page-about .about-region__point p {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--db-mist);
}

.page-about .about-region__note {
  margin-top: clamp(18px, 3vw, 26px);
  padding: 14px 16px;
  border-left: 3px solid rgba(255, 122, 26, 0.6);
  border-radius: 0 var(--db-r-s) var(--db-r-s) 0;
  background: rgba(255, 122, 26, 0.07);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 244, 255, 0.85);
}

/* ---------- 规模与质量 ---------- */
.page-about .about-scale {
  padding-top: var(--about-flow);
  padding-bottom: var(--about-flow);
}

.page-about .about-scale .db-h2 {
  max-width: 22ch;
}

.page-about .about-scale__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-about .about-scale__nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: var(--db-line-soft);
  overflow: hidden;
}

.page-about .about-scale__num {
  display: grid;
  gap: 6px;
  padding: 20px 18px;
  background: linear-gradient(150deg, rgba(18, 58, 92, 0.5), rgba(7, 26, 47, 0.92));
}

.page-about .about-scale__num .db-num {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--db-green);
}

.page-about .about-scale__unit {
  font-size: 0.55em;
  margin-left: 3px;
  color: var(--db-teal);
}

.page-about .about-scale__cap {
  font-size: 13px;
  line-height: 1.5;
  color: var(--db-mist);
}

.page-about .about-quality {
  padding: 20px 18px;
  border: 1px solid var(--db-line-soft);
  border-radius: var(--db-r-m);
  background: linear-gradient(150deg, rgba(18, 58, 92, 0.42), rgba(7, 26, 47, 0.9));
}

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

.page-about .about-quality__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--db-line-soft);
}

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

.page-about .about-quality__key {
  font-family: var(--db-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--db-orange);
}

.page-about .about-quality__val {
  font-size: 14px;
  line-height: 1.65;
  color: var(--db-mist);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  position: relative;
  padding: clamp(44px, 7vw, 88px) 0;
  background:
    radial-gradient(620px 320px at 12% 40%, rgba(57, 255, 136, 0.12), transparent 68%),
    var(--db-midnight);
  border-top: 1px solid var(--db-line-soft);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
}

.page-about .about-cta__inner p {
  max-width: 58ch;
  color: rgba(232, 244, 255, 0.85);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .db-btn:focus-visible {
  outline: 2px solid var(--db-green);
  outline-offset: 3px;
}

/* ---------- 进入显现 ---------- */
.db-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--db-ease), transform 0.6s var(--db-ease);
}

.db-js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 无悬停设备 ---------- */
@media (hover: none) {
  .page-about .about-node__more {
    grid-template-rows: 1fr;
    opacity: 1;
    margin-top: 10px;
  }
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 680px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-quality__item {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__body {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: center;
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }

  .page-about .about-hero__title {
    max-width: 15ch;
  }
}