.page-about {
  --about-line: rgba(201, 169, 106, 0.22);
  --about-card: rgba(12, 42, 35, 0.78);
  --about-glow: 0 18px 40px rgba(0, 0, 0, 0.38);
  position: relative;
}

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 6vw, 68px) 0 clamp(28px, 5vw, 48px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(ellipse at 18% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(ellipse at 18% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(18px, 4vw, 34px);
  font-size: 13px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  grid-template-columns: 1fr;
}

.page-about .about-hero__title {
  margin: 10px 0 18px;
  font-size: clamp(34px, 8vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .about-hero__intro {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
}

.page-about .about-fact {
  position: relative;
  padding: 14px 14px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(12, 42, 35, 0.92), rgba(7, 30, 25, 0.68));
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .about-fact:hover,
.page-about .about-fact:focus-within,
.page-about .about-fact:focus {
  transform: translateY(-4px);
  border-color: var(--neon-line);
  box-shadow: 0 0 0 1px rgba(66, 245, 209, 0.22), var(--about-glow);
}

.page-about .about-fact__num {
  display: inline;
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 600;
  line-height: 1;
  color: var(--neon);
  letter-spacing: -0.02em;
}

.page-about .about-fact__unit {
  margin-left: 4px;
  font-size: 12px;
  color: var(--gold);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-soft);
}

.page-about .about-fact__note {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: rgba(155, 188, 179, 0.6);
  transition: color var(--dur) var(--ease);
}

.page-about .about-fact:hover .about-fact__note,
.page-about .about-fact:focus-within .about-fact__note,
.page-about .about-fact:focus .about-fact__note {
  color: var(--neon);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  position: sticky;
  top: 10px;
  z-index: 6;
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin: 0 auto clamp(20px, 4vw, 34px);
}

.page-about .about-index__list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: rgba(10, 36, 30, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list a {
  display: block;
  padding: 8px 13px;
  border-radius: var(--r-pill);
  font-size: 12.5px;
  white-space: nowrap;
  color: var(--text-dim);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: rgba(66, 245, 209, 0.14);
  color: var(--neon);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  margin-bottom: clamp(20px, 3.5vw, 34px);
}

.page-about .about-head__title {
  margin: 8px 0 14px;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-head__intro {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-head--paper .about-head__title {
  color: var(--ink);
}

.page-about .about-head--paper .about-head__intro {
  color: #2c3a34;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background:
    repeating-linear-gradient(to right, rgba(201, 169, 106, 0.08) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(to bottom, rgba(201, 169, 106, 0.08) 0 1px, transparent 1px 44px),
    var(--pitch-2);
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-about .about-figure--wide .about-figure__img {
  aspect-ratio: 16 / 9;
}

.page-about .about-figure--tall .about-figure__img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure--square .about-figure__img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure__caption {
  padding: 10px 14px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-dim);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-origin .about-figure--wide {
  margin-bottom: clamp(24px, 4vw, 40px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--neon), var(--gold) 52%, rgba(201, 169, 106, 0.08));
}

.page-about .about-phase {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .about-phase__node {
  position: absolute;
  left: -28px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--pitch);
  border: 2px solid var(--neon);
  box-shadow: 0 0 0 4px rgba(66, 245, 209, 0.1);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-phase:hover .about-phase__node,
.page-about .about-phase:focus-within .about-phase__node {
  border-color: var(--ember);
  box-shadow: 0 0 0 6px rgba(255, 90, 54, 0.16);
}

.page-about .about-phase__body {
  padding: 12px 16px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-phase:hover .about-phase__body,
.page-about .about-phase:focus-within .about-phase__body {
  background: rgba(12, 42, 35, 0.6);
  border-color: var(--line-soft);
  transform: translateY(-3px);
}

.page-about .about-phase__step {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-phase h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-phase p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 能力卡 ---------- */
.page-about .about-caps {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .about-cap {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--about-card);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-cap::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--teal);
  border-radius: 2px;
}

.page-about .about-cap:hover,
.page-about .about-cap:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon-line);
  box-shadow: var(--about-glow);
}

.page-about .about-cap__metric {
  margin: 12px 0 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-about .about-cap h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-cap p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  grid-template-columns: 1fr;
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: linear-gradient(to right, rgba(12, 42, 35, 0.72), rgba(12, 42, 35, 0.2));
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-left-color: var(--neon);
  background: linear-gradient(to right, rgba(12, 42, 35, 0.92), rgba(12, 42, 35, 0.3));
}

.page-about .about-role__num {
  font-size: 24px;
  line-height: 1.1;
  color: var(--neon);
  letter-spacing: -0.02em;
}

.page-about .about-role h3 {
  margin: 0 0 5px;
  font-size: 16px;
  color: var(--paper);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-team__note {
  margin: 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  background: rgba(7, 30, 25, 0.4);
}

/* ---------- 山东与全国 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
  grid-template-columns: 1fr;
  align-items: center;
}

.page-about .about-region__text h2 {
  margin: 8px 0 14px;
}

.page-about .about-region__text p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-actions--stack {
  flex-direction: column;
  align-items: stretch;
  margin-top: 0;
}

/* ---------- 质量与安全（奶油纸块） ---------- */
.page-about .about-paper {
  padding: clamp(22px, 4vw, 44px);
  border-radius: var(--r-xl);
  background:
    repeating-linear-gradient(to bottom, rgba(5, 16, 13, 0.05) 0 1px, transparent 1px 46px),
    var(--cream);
  color: var(--ink);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.page-about .about-quality__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .about-quality__list li {
  padding: 14px 0 0;
  border-top: 1px solid rgba(5, 16, 13, 0.16);
}

.page-about .about-quality__list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-quality__list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-quality__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2c3a34;
}

/* ---------- 生态与荣誉 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .about-eco__card {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(7, 30, 25, 0.62);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-eco__card:hover,
.page-about .about-eco__card:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon-line);
  box-shadow: var(--about-glow);
}

.page-about .about-eco__card--accent {
  background: linear-gradient(160deg, rgba(255, 90, 54, 0.12), rgba(7, 30, 25, 0.7));
  border-color: rgba(255, 90, 54, 0.28);
}

.page-about .about-eco__metric {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-eco__card--accent .about-eco__metric {
  color: var(--ember);
}

.page-about .about-eco__card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-eco__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 收尾 ---------- */
.page-about .about-next__inner {
  padding: clamp(20px, 4vw, 38px);
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 10%, rgba(66, 245, 209, 0.14), transparent 55%),
    linear-gradient(150deg, #0C2A23, #071E19 70%);
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-about .about-next__title {
  margin: 8px 0 12px;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .about-next__text {
  max-width: 54ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 620px) {
  .page-about .about-caps,
  .page-about .about-eco__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-quality__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }

  .page-about .about-actions--stack {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 76px;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

  .page-about .about-caps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-actions--stack {
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-about .about-eco__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-phase__node {
    left: -34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-fact,
  .page-about .about-cap,
  .page-about .about-eco__card,
  .page-about .about-phase__body,
  .page-about .about-phase__node,
  .page-about .about-role {
    transition: none;
  }

  .page-about .about-fact:hover,
  .page-about .about-fact:focus,
  .page-about .about-fact:focus-within,
  .page-about .about-cap:hover,
  .page-about .about-cap:focus-within,
  .page-about .about-eco__card:hover,
  .page-about .about-eco__card:focus-within,
  .page-about .about-phase:hover .about-phase__body,
  .page-about .about-phase:focus-within .about-phase__body {
    transform: none;
  }
}