.page-about {
  --about-ink: var(--c-ink);
  --about-green: var(--c-green);
  --about-orange: var(--c-orange);
  --about-mist: var(--c-mist);
  --about-deep: var(--c-deep);
  --about-blue: var(--c-blue);
  --about-slate: var(--c-slate);
  --about-white: var(--c-white);
  --about-graphite: var(--c-graphite);
  --about-green-soft: var(--c-green-soft);
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  background-color: var(--about-ink);
  background-image:
    linear-gradient(rgba(0, 255, 135, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 135, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  padding: 64px 0 0;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  right: -12%;
  top: -20%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 198, 255, 0.18), transparent 65%);
  pointer-events: none;
}

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

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero-copy {
  padding-top: 12px;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 28px;
}

.page-about .about-hero .breadcrumb-item {
  color: rgba(255, 255, 255, 0.55);
}

.page-about .about-hero .breadcrumb-link {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb-link:hover {
  color: var(--about-green);
}

.page-about .about-hero .breadcrumb-current {
  color: var(--about-green);
}

.page-about .about-hero h1 {
  font-family: var(--f-title);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.18;
  color: var(--about-white);
  margin: 18px 0 22px;
  letter-spacing: -0.01em;
}

.page-about .about-hero-lead {
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 24px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .about-hero .btn-ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--about-white);
}

.page-about .about-hero .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-hero-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transform: rotate(1.2deg);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.45);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero-coord {
  position: absolute;
  right: 16px;
  bottom: 14px;
  font-family: var(--f-body);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--about-green);
  background: rgba(10, 26, 47, 0.72);
  padding: 6px 12px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

.page-about .about-databar {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 56px;
}

.page-about .about-databar-item {
  background: rgba(18, 52, 81, 0.72);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-databar-num {
  font-family: var(--f-title);
  font-size: 30px;
  color: var(--about-green);
  line-height: 1;
}

.page-about .about-databar-plus {
  color: var(--about-orange);
}

.page-about .about-databar-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  background: var(--about-mist);
  padding: 80px 0;
}

.page-about .about-story .container-narrow {
  max-width: 920px;
}

.page-about .about-story .section-label {
  margin-bottom: 18px;
}

.page-about .about-story h2 {
  font-family: var(--f-title);
  font-size: clamp(26px, 4vw, 40px);
  color: var(--about-graphite);
  line-height: 1.25;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.page-about .about-story > .container-narrow > p {
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-graphite);
  margin: 0 0 18px;
}

.page-about .about-story .pull-quote {
  border-left: 4px solid var(--about-green);
  background: var(--about-green-soft);
  padding: 20px 24px;
  font-family: var(--f-accent);
  font-size: 18px;
  line-height: 1.6;
  color: var(--about-deep);
  margin: 28px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-story .text-note {
  font-family: var(--f-accent);
  font-size: 14px;
  color: var(--about-slate);
  margin-top: 24px;
}

.page-about .about-story-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-principle {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--about-white);
  border-radius: var(--radius);
  padding: 20px 22px;
  border: 1px solid rgba(10, 26, 47, 0.06);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.page-about .about-principle:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(10, 26, 47, 0.08);
}

.page-about .about-principle-index {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--about-ink);
  color: var(--about-green);
  font-family: var(--f-title);
  font-size: 13px;
}

.page-about .about-principle strong {
  display: block;
  font-family: var(--f-title);
  font-size: 15px;
  color: var(--about-graphite);
  margin-bottom: 4px;
}

.page-about .about-principle p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-slate);
  margin: 0;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  background: var(--about-white);
  padding: 90px 0;
  position: relative;
}

.page-about .about-milestones::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 26, 47, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 26, 47, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.page-about .about-milestones .container-wide {
  position: relative;
}

.page-about .about-milestones-header {
  max-width: 700px;
  margin-bottom: 48px;
}

.page-about .about-milestones-header .section-label {
  margin-bottom: 16px;
}

.page-about .about-milestones-header h2 {
  font-family: var(--f-title);
  font-size: clamp(26px, 4vw, 40px);
  color: var(--about-graphite);
  line-height: 1.25;
  margin: 16px 0 14px;
  letter-spacing: -0.01em;
}

.page-about .about-milestones-lead {
  color: var(--about-slate);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-green), var(--about-blue), var(--about-green));
}

.page-about .about-milestone-item {
  position: relative;
  margin-bottom: 24px;
}

.page-about .about-milestone-item::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 26px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-green);
  box-shadow: 0 0 0 4px rgba(0, 255, 135, 0.2);
  z-index: 1;
}

.page-about .about-milestone-card {
  background: var(--about-mist);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  border: 1px solid rgba(10, 26, 47, 0.06);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-milestone-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(10, 26, 47, 0.1);
  border-color: rgba(0, 255, 135, 0.4);
}

.page-about .about-milestone-trigger {
  appearance: none;
  background: none;
  border: none;
  text-align: left;
  display: block;
  width: 100%;
  cursor: pointer;
  font-family: var(--f-body);
  color: inherit;
  padding: 0;
}

.page-about .about-milestone-year {
  display: inline-block;
  font-family: var(--f-title);
  font-size: 13px;
  color: var(--about-orange);
  letter-spacing: 0.08em;
  background: rgba(255, 106, 0, 0.1);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.page-about .about-milestone-title {
  display: block;
  font-family: var(--f-title);
  font-size: 20px;
  color: var(--about-graphite);
  margin-bottom: 6px;
}

.page-about .about-milestone-desc {
  display: block;
  font-size: 13px;
  color: var(--about-slate);
  line-height: 1.6;
}

.page-about .about-milestone-detail {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(10, 26, 47, 0.08);
}

.page-about .about-milestone-detail p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-graphite);
  margin: 0;
}

.page-about .about-milestone-trigger[aria-expanded="false"] + .about-milestone-detail {
  display: none;
}

.page-about .about-milestones-figure {
  margin: 48px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(10, 26, 47, 0.08);
}

.page-about .about-milestones-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-milestones-figure figcaption {
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-family: var(--f-body);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--about-green);
  background: var(--about-ink);
  padding: 5px 10px;
  border-radius: 999px;
}

/* ===== 核心能力 ===== */
.page-about .about-capabilities {
  background: var(--about-ink);
  color: var(--about-white);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-capabilities::before {
  content: '';
  position: absolute;
  left: -10%;
  bottom: -20%;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 255, 135, 0.12), transparent 60%);
  pointer-events: none;
}

.page-about .about-capabilities .container-wide {
  position: relative;
  z-index: 1;
}

.page-about .about-capabilities-header {
  max-width: 720px;
  margin-bottom: 44px;
}

.page-about .about-capabilities-header .section-label {
  margin-bottom: 14px;
}

.page-about .about-capabilities-header h2 {
  font-family: var(--f-title);
  font-size: clamp(28px, 4vw, 42px);
  color: var(--about-white);
  line-height: 1.25;
  margin: 16px 0 12px;
  letter-spacing: -0.01em;
}

.page-about .about-capabilities-lead {
  color: rgba(255, 255, 255, 0.62);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

.page-about .about-capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.page-about .about-capability-card {
  background: var(--about-deep);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-capability-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 255, 135, 0.5);
  background: #0d3d2f;
}

.page-about .about-capability-num {
  font-family: var(--f-title);
  font-size: 32px;
  color: var(--about-green);
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-about .about-capability-card h3 {
  font-family: var(--f-title);
  font-size: 17px;
  color: var(--about-white);
  margin: 0 0 8px;
}

.page-about .about-capability-card p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.page-about .about-capability-panel {
  background: var(--about-deep);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: grid;
  gap: 24px;
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.page-about .about-panel-copy h3 {
  font-family: var(--f-title);
  font-size: 20px;
  color: var(--about-white);
  margin: 12px 0 10px;
}

.page-about .about-panel-copy p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.68);
  margin: 0;
}

.page-about .about-data-accordion .accordion-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.page-about .about-data-accordion .accordion-trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: none;
  border: none;
  padding: 16px 6px 16px 16px;
  color: var(--about-white);
  font-family: var(--f-title);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
}

.page-about .about-data-accordion .accordion-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 255, 135, 0.16);
  position: relative;
  flex-shrink: 0;
}

.page-about .about-data-accordion .accordion-icon::before,
.page-about .about-data-accordion .accordion-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--about-green);
  border-radius: 2px;
}

.page-about .about-data-accordion .accordion-icon::before {
  width: 10px;
  height: 2px;
}

.page-about .about-data-accordion .accordion-icon::after {
  width: 2px;
  height: 10px;
}

.page-about .about-data-accordion .accordion-trigger[aria-expanded="true"] .accordion-icon::after {
  display: none;
}

.page-about .about-data-accordion .accordion-panel {
  padding: 0 20px 20px 20px;
}

.page-about .about-data-accordion .accordion-panel p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.68);
  margin: 0;
}

.page-about .about-data-accordion .accordion-trigger[aria-expanded="false"] + .accordion-panel {
  display: none;
}

/* ===== 本地化服务 ===== */
.page-about .about-local {
  background: var(--about-mist);
  padding: 90px 0;
}

.page-about .about-local-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-local-copy {
  background: var(--about-ink);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
}

.page-about .about-local-copy::before {
  content: '';
  position: absolute;
  right: -18%;
  top: -30%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 255, 135, 0.15), transparent 60%);
  pointer-events: none;
}

.page-about .about-local-copy .section-label {
  position: relative;
  z-index: 1;
  margin-bottom: 16px;
}

.page-about .about-local-copy h2 {
  position: relative;
  z-index: 1;
  font-family: var(--f-title);
  font-size: clamp(24px, 4vw, 34px);
  color: var(--about-white);
  line-height: 1.3;
  margin: 16px 0 16px;
  letter-spacing: -0.01em;
}

.page-about .about-local-copy p {
  position: relative;
  z-index: 1;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 20px;
  max-width: 520px;
}

.page-about .about-local-list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-local-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
}

.page-about .about-local-list li::before {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--about-green);
  margin-top: 7px;
  box-shadow: 0 0 0 3px rgba(0, 255, 135, 0.16);
}

.page-about .about-local-visual {
  position: relative;
}

.page-about .about-local-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(10, 26, 47, 0.08);
}

.page-about .about-local-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 96px 0 0;
  }

  .page-about .about-hero-inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-about .about-hero-media {
    transform: rotate(1.5deg);
  }

  .page-about .about-databar {
    grid-template-columns: repeat(4, 1fr);
    margin-top: 72px;
  }

  .page-about .about-databar-item {
    padding: 26px 24px;
  }

  .page-about .about-databar-num {
    font-size: 34px;
  }

  .page-about .about-story {
    padding: 100px 0;
  }

  .page-about .about-story-principles {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about .about-milestones {
    padding: 110px 0;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-milestone-item {
    width: 50%;
    padding-right: 44px;
    margin-bottom: 28px;
  }

  .page-about .about-milestone-item::before {
    right: -8px;
    left: auto;
    top: 28px;
    width: 16px;
    height: 16px;
  }

  .page-about .about-milestone-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 44px;
  }

  .page-about .about-milestone-item:nth-child(even)::before {
    left: -8px;
    right: auto;
  }

  .page-about .about-milestone-item:nth-child(odd) .about-milestone-card {
    text-align: right;
  }

  .page-about .about-milestone-item:nth-child(odd) .about-milestone-trigger {
    text-align: right;
  }

  .page-about .about-milestones-figure {
    margin-top: 56px;
  }

  .page-about .about-capabilities {
    padding: 110px 0;
  }

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

  .page-about .about-capability-panel {
    grid-template-columns: 1fr 1fr;
    padding: 40px 36px;
  }

  .page-about .about-local {
    padding: 110px 0;
  }

  .page-about .about-local-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-capability-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-local-copy {
    padding: 44px 40px;
  }
}