/* ==========================================================
   品牌档案页 · 页面专属样式
   作用域：.page-about
   移动端优先
   ========================================================== */
.page-about {
  --about-gap: 40px;
  background: var(--white);
}

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

/* ---------- 英雄区 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--deep-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--white);
  padding: 28px 0 84px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 26, 0.22), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 30%, var(--gold) 30% 46%, transparent 46%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  background: transparent;
  padding: 0 0 34px;
  position: relative;
  z-index: 2;
}

.page-about .about-hero .breadcrumb__link {
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-hero .breadcrumb__link:hover,
.page-about .about-hero .breadcrumb__link:focus-visible {
  color: var(--orange);
}

.page-about .about-hero .breadcrumb__item[aria-current="page"] {
  color: var(--white);
}

.page-about .about-hero .breadcrumb__item + .breadcrumb__item::before {
  color: rgba(255, 255, 255, 0.5);
}

.page-about .about-hero__deco {
  position: absolute;
  right: 3%;
  top: 18%;
  width: 150px;
  height: 150px;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.page-about .about-hero__title {
  margin: 16px 0 22px;
  font-size: clamp(2.4rem, 6vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-family: var(--font-display);
}

.page-about .about-hero__title-accent {
  color: var(--orange);
}

.page-about .about-hero__desc {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 1.04rem;
  line-height: 1.8;
  margin: 0 0 38px;
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 0;
  padding: 26px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-hero__meta-item {
  padding: 4px 14px 4px 4px;
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}

.page-about .about-hero__meta dd {
  margin: 0;
}

.page-about .about-hero__meta-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}

.page-about .about-hero__meta-label {
  display: block;
  margin-top: 5px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.66);
  letter-spacing: 0.06em;
}

/* ---------- 品牌简介 ---------- */
.page-about .about-intro {
  background: var(--cream);
  padding: 92px 0;
}

.page-about .about-intro__grid {
  display: grid;
  gap: 56px;
  align-items: center;
}

.page-about .about-intro__content {
  max-width: 640px;
}

.page-about .about-intro__heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  line-height: 1.2;
  margin: 14px 0 22px;
}

.page-about .about-intro__text {
  color: rgba(43, 32, 26, 0.84);
  font-size: 0.98rem;
  line-height: 1.85;
  margin-bottom: 16px;
}

.page-about .about-intro__points {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .about-intro__point {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(18, 58, 95, 0.14);
}

.page-about .about-intro__point:first-child {
  border-top: 1px solid rgba(18, 58, 95, 0.14);
}

.page-about .about-intro__point-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-intro__point-body h3 {
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 6px;
  color: var(--ink);
}

.page-about .about-intro__point-body p {
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(43, 32, 26, 0.72);
  margin: 0;
}

.page-about .about-intro__media {
  max-width: 500px;
}

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

.page-about .about-intro__figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-intro__quote {
  position: relative;
  margin: 30px 0 0 16px;
  padding: 22px 24px 22px 28px;
  background: var(--white);
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-sm);
}

.page-about .about-intro__quote-mark {
  display: block;
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--orange);
  line-height: 0.8;
}

.page-about .about-intro__quote p {
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 发展历程 · 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--deep-blue);
  color: var(--white);
  padding: 92px 0 104px;
}

.page-about .about-timeline .section-title {
  color: rgba(255, 255, 255, 0.88);
}

.page-about .about-timeline__heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin: 14px 0 14px;
}

.page-about .about-timeline__intro {
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.76);
  margin-bottom: 56px;
}

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

.page-about .about-timeline__track {
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
}

.page-about .about-timeline__track svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 52px;
  padding-bottom: 56px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 8px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 8px;
  top: 6px;
  filter: drop-shadow(0 0 8px rgba(255, 107, 26, 0.6));
  transition: transform 0.3s var(--ease), filter 0.3s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  transform: scale(1.4);
  filter: drop-shadow(0 0 12px rgba(255, 107, 26, 0.85));
}

.page-about .about-timeline__card {
  position: relative;
  overflow: hidden;
  background: var(--cream);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-timeline__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--orange);
}

.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.page-about .about-timeline__year,
.page-about .about-timeline__phase {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 8px;
}

.page-about .about-timeline__phase {
  background: rgba(255, 107, 26, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

.page-about .about-timeline__card-title {
  font-family: var(--font-display);
  font-size: 1.22rem;
  line-height: 1.3;
  margin: 0 0 10px;
}

.page-about .about-timeline__card-text {
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(43, 32, 26, 0.76);
  margin: 0;
}

.page-about .about-timeline__media {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 8px auto 56px;
}

.page-about .about-timeline__media figure {
  margin: 0;
}

.page-about .about-timeline__media img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-timeline__media .media-frame__caption {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.78);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

/* ---------- 资质与认证 ---------- */
.page-about .about-cert {
  background: var(--cream);
  padding: 92px 0;
}

.page-about .about-cert__heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin: 14px 0 14px;
}

.page-about .about-cert__intro {
  max-width: 640px;
  line-height: 1.75;
  color: rgba(43, 32, 26, 0.74);
  margin-bottom: 48px;
}

.page-about .about-cert__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

.page-about .about-cert__item {
  perspective: 900px;
  height: 240px;
  cursor: default;
  outline: none;
}

.page-about .about-cert__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease);
}

.page-about .about-cert__item:hover .about-cert__inner,
.page-about .about-cert__item:focus-visible .about-cert__inner,
.page-about .about-cert__item:focus .about-cert__inner {
  transform: rotateY(180deg);
}

.page-about .about-cert__front,
.page-about .about-cert__back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 22px;
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  background: var(--white);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .about-cert__back {
  transform: rotateY(180deg);
  background: var(--deep-blue);
  border-color: var(--gold);
  color: var(--white);
}

.page-about .about-cert__icon {
  margin-bottom: 12px;
}

.page-about .about-cert__title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 4px;
}

.page-about .about-cert__back .about-cert__title {
  color: var(--white);
}

.page-about .about-cert__sub {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--orange);
}

.page-about .about-cert__back p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--mist);
  padding: 92px 0;
}

.page-about .about-eco__heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin: 14px 0 14px;
}

.page-about .about-eco__intro {
  max-width: 640px;
  line-height: 1.75;
  color: rgba(43, 32, 26, 0.74);
  margin-bottom: 44px;
}

.page-about .about-eco__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

.page-about .about-eco__card {
  position: relative;
  background: var(--white);
  border: 1px solid rgba(11, 29, 58, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 30px 26px;
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-eco__card:hover,
.page-about .about-eco__card:focus-within {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.page-about .about-eco__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--white);
  background: var(--deep-blue);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.page-about .about-eco__card h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.35;
  margin: 0 0 12px;
}

.page-about .about-eco__card p {
  font-size: 0.93rem;
  line-height: 1.72;
  color: rgba(43, 32, 26, 0.74);
  margin: 0;
}

.page-about .about-eco__note {
  margin-top: 40px;
  padding: 18px 22px;
  border-left: 4px solid var(--gold);
  background: rgba(201, 162, 39, 0.08);
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(43, 32, 26, 0.7);
}

/* ---------- 市场覆盖 ---------- */
.page-about .about-coverage {
  background: var(--white);
  padding: 92px 0;
}

.page-about .about-coverage__heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin: 14px 0 44px;
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 52px;
  align-items: center;
}

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

.page-about .about-coverage__map figure {
  margin: 0;
}

.page-about .about-coverage__map img {
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-coverage__nodes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .about-coverage__node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: auto;
}

.page-about .about-coverage__dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 26, 0.2), 0 0 0 12px rgba(255, 107, 26, 0.08);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-coverage__node:hover .about-coverage__dot,
.page-about .about-coverage__node:focus-within .about-coverage__dot {
  transform: scale(1.4);
  box-shadow: 0 0 0 8px rgba(255, 107, 26, 0.28), 0 0 0 16px rgba(255, 107, 26, 0.12);
}

.page-about .about-coverage__node b {
  display: block;
  margin-top: 8px;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--ink);
}

.page-about .about-coverage__node--taiyuan {
  left: 48%;
  top: 32%;
}

.page-about .about-coverage__node--datong {
  left: 62%;
  top: 10%;
}

.page-about .about-coverage__node--yuncheng {
  left: 44%;
  top: 82%;
}

.page-about .about-coverage__node--changzhi {
  left: 66%;
  top: 66%;
}

.page-about .about-coverage__content .stat-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 34px 0;
}

.page-about .about-coverage__text {
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(43, 32, 26, 0.82);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  background: var(--deep-blue);
  color: var(--white);
  padding: 80px 0;
}

.page-about .about-cta__inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.25;
  margin: 12px 0 16px;
}

.page-about .about-cta__text {
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 28px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__deco {
    width: 180px;
    height: 180px;
    opacity: 0.9;
  }

  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 720px) {
  .page-about .about-eco__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-intro__grid {
    grid-template-columns: 1.04fr 0.96fr;
    gap: 88px;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-timeline__track {
    left: calc(50% - 1px);
  }

  .page-about .about-timeline__item {
    width: calc(50% - 56px);
    padding-left: 0;
  }

  .page-about .about-timeline__item--left {
    margin-right: auto;
    text-align: right;
  }

  .page-about .about-timeline__item--right {
    margin-left: auto;
    text-align: left;
  }

  .page-about .about-timeline__dot {
    left: auto;
  }

  .page-about .about-timeline__item--left .about-timeline__dot {
    left: calc(100% + 48px);
  }

  .page-about .about-timeline__item--right .about-timeline__dot {
    left: -48px;
  }

  .page-about .about-timeline__card::before {
    left: 0;
    right: auto;
  }

  .page-about .about-timeline__item--left .about-timeline__card::before {
    right: 0;
    left: auto;
  }

  .page-about .about-cert__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}