.page-about {
  padding-top: var(--header-h);
}

.page-about .breadcrumb {
  padding-top: 28px;
  padding-bottom: 0;
}

/* ============ Hero 首屏 ============ */
.page-about .about-hero {
  position: relative;
  text-align: center;
  padding: 56px 20px 64px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 48% at 50% 22%, rgba(201, 169, 78, 0.13), transparent 72%),
    repeating-linear-gradient(
      -45deg,
      transparent 0,
      transparent 14px,
      rgba(201, 169, 78, 0.04) 14px,
      rgba(201, 169, 78, 0.04) 15px
    );
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero-eyebrow {
  display: inline-block;
  color: var(--gold-deep);
  font-size: var(--fs-6);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 16px;
  padding: 5px 16px;
  border: 1px solid rgba(201, 169, 78, 0.35);
  background: rgba(201, 169, 78, 0.06);
  clip-path: var(--cut-corner-sm);
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: var(--fs-1);
  line-height: 1.42;
  margin: 0 0 18px;
  letter-spacing: 0.02em;
  color: var(--white-warm);
}

.page-about .about-hero-lead {
  max-width: 680px;
  margin: 0 auto 24px;
  color: var(--gray-mist);
  font-size: var(--fs-4);
  line-height: 1.9;
}

.page-about .about-hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: var(--fs-6);
  color: var(--gold-deep);
  letter-spacing: 0.12em;
}

.page-about .about-hero-meta::before,
.page-about .about-hero-meta::after {
  content: "";
  width: 36px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-deep));
}

.page-about .about-hero-meta::after {
  background: linear-gradient(90deg, var(--gold-deep), transparent);
}

/* ============ 品牌故事 ============ */
.page-about .about-story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-story-main {
  background: var(--panel-dark);
  border: 1px solid rgba(201, 169, 78, 0.26);
  clip-path: var(--cut-corner);
  padding: 40px 32px;
  position: relative;
}

.page-about .about-story-main .section-title {
  margin-top: 0;
}

.page-about .about-story-main p {
  margin-bottom: 18px;
  line-height: 1.9;
  color: var(--white-warm);
}

.page-about .about-story-figure {
  margin: 24px 0 0;
}

.page-about .about-story-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--brown-dim);
}

.page-about .about-story-aside {
  position: relative;
}

.page-about .about-story-aside .about-story-figure {
  margin-top: 0;
}

.page-about .about-story-aside img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--brown-dim);
}

/* ============ 通用标题悬停金线 ============ */
.page-about .section-title {
  position: relative;
}

.page-about .section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-bright), var(--gold-deep), transparent);
  transition: width var(--dur) var(--ease-out);
}

.page-about .section-title:hover::after {
  width: 56px;
}

/* ============ 里程碑时间轴 ============ */
.page-about .about-timeline-list {
  position: relative;
  margin-top: 40px;
  padding-left: 36px;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: repeating-linear-gradient(
    -45deg,
    var(--brown-dim) 0,
    var(--brown-dim) 2px,
    transparent 2px,
    transparent 7px
  );
  border-left: 1px solid rgba(201, 169, 78, 0.2);
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 28px;
  background: var(--panel-dark);
  border: 1px solid rgba(201, 169, 78, 0.2);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}

.page-about .about-timeline-item:hover {
  border-color: rgba(201, 169, 78, 0.45);
}

.page-about .about-timeline-item[open] {
  border-color: rgba(201, 169, 78, 0.5);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 24px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--gold-deep);
  background: var(--ink-black);
  box-shadow: 0 0 0 4px rgba(201, 169, 78, 0.12);
  z-index: 1;
}

.page-about .about-timeline-item + .about-timeline-item::after {
  content: "";
  position: absolute;
  left: -26px;
  top: -28px;
  width: 18px;
  height: 30px;
  background: repeating-linear-gradient(
    135deg,
    var(--brown-dim) 0,
    var(--brown-dim) 1.5px,
    transparent 2px,
    transparent 6px
  );
  clip-path: polygon(0 100%, 40% 100%, 100% 0, 60% 0);
  opacity: 0.6;
}

.page-about .about-timeline-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 28px;
}

.page-about .about-timeline-item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-item summary::-moz-list-bullet {
  list-style: none;
}

.page-about .about-timeline-title {
  font-family: var(--font-heading);
  font-size: var(--fs-3);
  color: var(--white-warm);
  line-height: 1.45;
}

.page-about .about-timeline-item summary::after {
  content: "+";
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--gold-deep);
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease-out);
}

.page-about .about-timeline-item[open] summary::after {
  content: "–";
  transform: rotate(180deg);
}

.page-about .about-timeline-item.is-current {
  border-color: rgba(201, 169, 78, 0.55);
}

.page-about .about-timeline-current {
  display: inline-block;
  font-size: var(--fs-6);
  font-family: var(--font-body);
  font-weight: 500;
  background: var(--red-deep);
  color: var(--white-warm);
  padding: 2px 9px;
  margin-left: 8px;
  border-radius: 2px;
  letter-spacing: 0.1em;
  vertical-align: 2px;
}

.page-about .about-timeline-detail {
  padding: 0 28px 24px;
  line-height: 1.85;
  color: var(--gray-mist);
}

.page-about .about-timeline-detail p {
  margin: 0;
}

.page-about .about-timeline-footnote {
  margin: 12px 0 0;
  text-align: right;
  font-size: var(--fs-6);
}

/* ============ 页面内容链接 ============ */
.page-about a:not(.btn) {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 169, 78, 0.35);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}

.page-about a:not(.btn):hover {
  color: var(--gold-bright);
  border-color: var(--gold-bright);
}

/* ============ 服务理念 ============ */
.page-about .about-values {
  text-align: center;
}

.page-about .about-values .section-title {
  display: inline-block;
  padding-bottom: 12px;
  background: linear-gradient(90deg, transparent, var(--brown-dim), transparent) no-repeat center bottom / 64px 1px;
}

.page-about .about-values .section-title::before,
.page-about .about-credentials .section-title::before {
  content: none;
}

.page-about .about-values .section-title::after,
.page-about .about-credentials .section-title::after {
  left: 50%;
  transform: translateX(-50%);
}

.page-about .about-values-grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about .about-value-card {
  position: relative;
  padding: 32px 24px;
  text-align: left;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}

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

.page-about .about-value-num {
  font-family: var(--font-heading);
  font-size: var(--fs-1);
  line-height: 1;
  display: block;
  margin-bottom: 14px;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold-deep);
}

.page-about .about-value-card h3 {
  font-family: var(--font-heading);
  font-size: var(--fs-3);
  margin: 0 0 12px;
  color: var(--white-warm);
}

.page-about .about-value-card p {
  color: var(--gray-mist);
  line-height: 1.78;
  margin: 0;
}

.page-about .about-values-links {
  margin-top: 36px;
  text-align: center;
}

.page-about .about-values-links .btn {
  margin: 0 6px 12px;
}

/* ============ 资质与备案 ============ */
.page-about .about-credentials {
  text-align: center;
}

.page-about .about-credentials-banner {
  margin-bottom: 40px;
}

.page-about .about-credentials-banner img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--brown-dim);
}

.page-about .about-credentials-content {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  background: var(--panel-dark);
  border: 1px solid rgba(201, 169, 78, 0.26);
  clip-path: var(--cut-corner);
  padding: 48px 32px;
}

.page-about .about-credentials-content .section-title {
  display: inline-block;
  padding-bottom: 12px;
  background: linear-gradient(90deg, transparent, var(--brown-dim), transparent) no-repeat center bottom / 64px 1px;
  margin-top: 0;
}

.page-about .about-credentials-content > p {
  color: var(--gray-mist);
  line-height: 1.9;
  margin-bottom: 24px;
}

.page-about .about-credentials-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 10px;
  text-align: left;
}

.page-about .about-credentials-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  color: var(--white-warm);
  line-height: 1.6;
}

.page-about .about-credentials-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  transform: rotate(45deg);
  background: var(--gold-deep);
  flex-shrink: 0;
  position: relative;
  top: -3px;
}

.page-about .about-credentials-note {
  color: var(--gray-mist);
  font-size: var(--fs-6);
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-about .about-credentials-links {
  color: var(--brown-dim);
  font-size: var(--fs-6);
}

.page-about .about-credentials-links span {
  margin: 0 6px;
  color: var(--brown-dim);
}

/* ============ 桌面端适配 ============ */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 20px 80px;
  }

  .page-about .about-hero h1 {
    font-size: calc(var(--fs-1) + 0.5rem);
  }

  .page-about .about-story-grid {
    grid-template-columns: 1.4fr 0.8fr;
    gap: 40px;
  }

  .page-about .about-story-main {
    padding: 48px;
  }

  .page-about .about-story-aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

  .page-about .about-credentials-content {
    padding: 56px 48px;
  }
}