.page-about {
  --about-sidebar-w: 264px;
  --about-gold-soft: rgba(201, 169, 97, 0.16);

  background-color: var(--color-bg-body);
  color: var(--color-text-dark);
  font-family: var(--font-serif);
  line-height: 1.65;
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  position: relative;
  background: linear-gradient(132deg, var(--color-grad-start) 0%, var(--color-grad-end) 100%);
  color: var(--color-white);
  padding: 44px 0 52px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -160px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.18) 0%, rgba(201, 169, 97, 0) 70%);
  pointer-events: none;
}

.page-about .about-hero__vertical {
  display: none;
}

.page-about .about-hero__ring {
  position: absolute;
  right: 40px;
  bottom: -24px;
  width: 180px;
  height: 180px;
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero__content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 20px;
}

.page-about .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  border-bottom-color: var(--color-gold);
}

.page-about .breadcrumb__current {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
}

.page-about .breadcrumb__sep {
  opacity: 0.5;
}

.page-about .about-hero__title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.7rem, 5vw, 2.7rem);
  line-height: 1.18;
  margin: 14px 0 18px;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 22px;
  max-width: 56ch;
}

.page-about .about-hero__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__points li {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-gold);
  background: rgba(201, 169, 97, 0.13);
  border: 1px solid rgba(201, 169, 97, 0.32);
  border-radius: 999px;
  padding: 5px 13px;
}

.page-about .about-hero__visual {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.3);
}

/* ========== 主体布局：侧边品牌轨道 + 正文 ========== */
.page-about .about-layout {
  display: grid;
  gap: 40px;
  padding-top: 44px;
  padding-bottom: 72px;
}

.page-about .about-track {
  font-family: var(--font-sans);
  min-width: 0;
}

.page-about .about-track__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .about-track__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-bg-deep);
  color: var(--color-gold);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1;
}

.page-about .about-track__name {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--color-bg-deep);
}

.page-about .about-track__label {
  margin: 0 0 10px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.page-about .about-track__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-track__nav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-dark);
  text-decoration: none;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: 999px;
  padding: 5px 13px;
  transition: color var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

.page-about .about-track__nav a:hover,
.page-about .about-track__nav a:focus-visible {
  color: var(--color-bg-deep);
  border-color: var(--color-gold);
  background: var(--about-gold-soft);
}

.page-about .about-track__note {
  background: var(--color-bg-deep);
  color: var(--color-gold);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  padding: 12px 14px;
  border-radius: var(--radius-small);
  margin-bottom: 14px;
}

.page-about .about-track__contact {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.page-about .about-track__contact span {
  display: block;
  font-weight: 600;
  color: var(--color-text-dark);
}

.page-about .about-track__contact a {
  color: var(--color-bg-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--color-gold);
  transition: background var(--transition-base);
}

.page-about .about-track__contact a:hover,
.page-about .about-track__contact a:focus-visible {
  background: var(--about-gold-soft);
}

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

/* ========== 正文分区 ========== */
.page-about .about-section {
  position: relative;
  scroll-margin-top: 20px;
  margin-bottom: 56px;
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border-bottom: 1px solid var(--color-border-soft);
  padding-bottom: 14px;
  margin-bottom: 24px;
  position: relative;
}

.page-about .about-section__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-gold);
}

.page-about .about-section__index {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-gold);
}

.page-about .about-section__title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--color-bg-deep);
  letter-spacing: -0.01em;
}

.page-about .about-section__desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ========== 品牌使命 ========== */
.page-about .about-mission__statement {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  line-height: 1.5;
  color: var(--color-bg-deep);
  border-left: 4px solid var(--color-gold);
  padding-left: 16px;
  margin: 0 0 26px;
}

.page-about .about-mission__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-mission__card {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-card);
  padding: 22px 22px 20px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.page-about .about-mission__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), transparent 70%);
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.page-about .about-mission__card:hover,
.page-about .about-mission__card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(201, 169, 97, 0.45);
}

.page-about .about-mission__card:hover::before,
.page-about .about-mission__card:focus-within::before {
  opacity: 1;
}

.page-about .about-mission__num {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-gold);
}

.page-about .about-mission__card h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.08rem;
  margin: 8px 0 6px;
  color: var(--color-bg-deep);
}

.page-about .about-mission__card p {
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0;
  color: var(--color-text-muted);
}

/* ========== 发展历程 ========== */
.page-about .about-timeline {
  position: relative;
  margin-bottom: 28px;
}

.page-about .about-timeline__line {
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  pointer-events: none;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 36px;
  margin-bottom: 16px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 1px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.18);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 7px rgba(201, 169, 97, 0.24);
}

.page-about .about-timeline__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-card);
  padding: 16px 18px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  border-color: rgba(201, 169, 97, 0.5);
  box-shadow: var(--shadow-card-hover);
  transform: translateX(3px);
}

.page-about .about-timeline__period {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-bg-deep);
  background: rgba(201, 169, 97, 0.16);
  border: 1px solid rgba(201, 169, 97, 0.3);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 8px;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.02rem;
  margin: 0 0 5px;
  color: var(--color-bg-deep);
}

.page-about .about-timeline__card p {
  font-size: 0.88rem;
  line-height: 1.72;
  margin: 0;
  color: var(--color-text-muted);
}

/* ========== 图注共用 ========== */
.page-about .about-history__figure,
.page-about .about-service__figure {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  background: var(--color-bg-card);
}

.page-about .about-history__figure img,
.page-about .about-service__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-history__figure figcaption,
.page-about .about-service__figure figcaption {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  padding: 10px 14px;
}

/* ========== 服务体系 ========== */
.page-about .about-service__intro {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin: 0 0 22px;
}

.page-about .about-service__grid {
  display: grid;
  gap: 18px;
  margin-bottom: 20px;
}

.page-about .about-service__features {
  display: grid;
  gap: 12px;
}

.page-about .about-service__feature {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-left: 3px solid var(--color-gold);
  border-radius: var(--radius-card);
  padding: 18px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-service__feature:hover {
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}

.page-about .about-service__feature h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 6px;
  color: var(--color-bg-deep);
}

.page-about .about-service__feature p {
  font-size: 0.88rem;
  line-height: 1.72;
  margin: 0;
  color: var(--color-text-muted);
}

.page-about .about-service__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-service__stat {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-deep);
  border-radius: var(--radius-card);
  color: var(--color-white);
  padding: 18px 16px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-service__stat:nth-child(even) {
  background: var(--color-bg-deep-soft);
}

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

.page-about .about-service__num {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--color-gold);
}

.page-about .about-service__unit {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 4px;
}

.page-about .about-service__tip {
  font-size: 0.72rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.55);
  border-top: 1px solid rgba(201, 169, 97, 0.2);
  margin-top: 8px;
  padding-top: 7px;
  transition: color var(--transition-base);
}

.page-about .about-service__stat:hover .about-service__tip {
  color: rgba(255, 255, 255, 0.75);
}

.page-about .about-service__tags {
  margin: 0 0 22px;
}

/* ========== 资质与认证 ========== */
.page-about .about-cert__intro {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin: 0 0 22px;
}

.page-about .about-cert__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-cert__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-cert__card:hover,
.page-about .about-cert__card:focus-within {
  border-color: rgba(201, 169, 97, 0.5);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.page-about .about-cert__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--color-bg-deep);
  color: var(--color-gold);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.92rem;
  margin-bottom: 12px;
}

.page-about .about-cert__card h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 6px;
  color: var(--color-bg-deep);
}

.page-about .about-cert__card p {
  font-size: 0.88rem;
  line-height: 1.72;
  margin: 0;
  color: var(--color-text-muted);
}

/* ========== 页尾呼吁区 ========== */
.page-about .about-cta {
  background: linear-gradient(132deg, var(--color-grad-start) 0%, var(--color-grad-end) 100%);
  border-radius: var(--radius-card);
  padding: 36px 24px;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -70px;
  transform: translateX(-50%);
  width: 240px;
  height: 140px;
  border-radius: 50%;
  background: rgba(201, 169, 97, 0.12);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.2vw, 1.8rem);
  margin: 0 0 10px;
  color: var(--color-white);
}

.page-about .about-cta__text {
  position: relative;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
  max-width: 46ch;
  margin: 0 auto 22px;
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ========== 桌面端增强 ========== */
@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 76px 0 72px;
  }

  .page-about .about-hero__vertical {
    display: flex;
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    color: rgba(255, 255, 255, 0.38);
    border-right: 1px solid rgba(201, 169, 97, 0.3);
    padding-right: 12px;
    align-items: center;
    pointer-events: none;
    z-index: 2;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    margin-left: 56px;
  }

  .page-about .about-hero__visual img {
    border-radius: 18px;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-sidebar-w) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
    padding-top: 60px;
    padding-bottom: 96px;
  }

  .page-about .about-track {
    position: sticky;
    top: 28px;
  }

  .page-about .about-track__nav {
    flex-direction: column;
    align-items: stretch;
    border-left: 2px solid var(--color-border-soft);
    padding-left: 18px;
    gap: 6px;
    margin-bottom: 26px;
  }

  .page-about .about-track__nav a {
    font-size: 0.95rem;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 7px 0;
    position: relative;
    transition: color var(--transition-base), padding-left var(--transition-base);
  }

  .page-about .about-track__nav a::before {
    content: "";
    position: absolute;
    left: -19px;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-border-soft);
    transform: translateY(-50%);
    transition: background var(--transition-base), transform var(--transition-base);
  }

  .page-about .about-track__nav a:hover,
  .page-about .about-track__nav a:focus-visible {
    background: transparent;
    color: var(--color-bg-deep);
    padding-left: 6px;
  }

  .page-about .about-track__nav a:hover::before,
  .page-about .about-track__nav a:focus-visible::before {
    background: var(--color-gold);
    transform: translateY(-50%) scale(1.35);
  }

  .page-about .about-section {
    margin-bottom: 72px;
  }

  .page-about .about-mission__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-service__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
    align-items: stretch;
  }

  .page-about .about-cert__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-cta {
    padding: 52px 48px;
  }
}