.page-about {
  --font-accent: "Playfair Display", "Source Serif", "Noto Serif SC", serif;
  --page-gap: clamp(4rem, 8vw, 7rem);
  background: var(--color-paper);
  color: var(--color-ink);
  overflow-x: hidden;
}

/* ===== 通用章节排版 ===== */
.page-about .section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-blue);
  border-left: 3px solid var(--color-yellow);
  padding-left: 0.65rem;
  margin-bottom: 0.9rem;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.4vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.page-about .section-lead {
  font-size: 1rem;
  line-height: 1.7;
  opacity: 0.86;
  max-width: 680px;
}

.page-about .prose {
  font-size: 1rem;
  line-height: 1.75;
}

.page-about .prose p {
  margin-bottom: 1.1rem;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* 章节背景大编号 */
.page-about .about-story,
.page-about .about-capability,
.page-about .about-honor,
.page-about .about-contact {
  position: relative;
}

.page-about .about-story::before,
.page-about .about-capability::before,
.page-about .about-honor::before,
.page-about .about-contact::before {
  content: "01";
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(5rem, 16vw, 13rem);
  line-height: 1;
  position: absolute;
  top: 1rem;
  right: -0.2rem;
  z-index: 0;
  pointer-events: none;
  color: transparent;
  -webkit-text-stroke: 1px rgba(30, 136, 199, 0.22);
}

.page-about .about-capability::before {
  content: "03";
}

.page-about .about-honor::before {
  content: "04";
  -webkit-text-stroke: 1px rgba(30, 136, 199, 0.18);
}

.page-about .about-contact::before {
  content: "05";
  -webkit-text-stroke: 1px rgba(30, 136, 199, 0.14);
}

.page-about .about-story > .container,
.page-about .about-capability > .container,
.page-about .about-honor > .container,
.page-about .about-contact > .container {
  position: relative;
  z-index: 1;
}

/* ===== 首屏专题封面 ===== */
.page-about .about-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: var(--color-deep);
  color: var(--color-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 4vw), 0 100%);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  max-width: none;
}

.page-about .about-hero__shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.68) 0%, rgba(11, 27, 43, 0.82) 55%, var(--color-deep) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-top: 6rem;
  padding-bottom: calc(4vw + 2.25rem);
}

.page-about .about-hero__chapter {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-yellow);
  color: var(--color-ink);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem 0.35rem 0.4rem;
  transform: skewX(-8deg);
}

.page-about .about-hero__chapter > * {
  transform: skewX(8deg);
}

.page-about .about-hero__chapter-num {
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 1.4rem 0 1rem;
  max-width: 12em;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.72;
  max-width: 560px;
  opacity: 0.88;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 640px;
  margin: 2.4rem 0 2.8rem;
  padding-top: 1.4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-yellow);
  line-height: 1.2;
}

.page-about .about-hero__statlabel {
  display: block;
  font-size: 0.75rem;
  line-height: 1.4;
  opacity: 0.72;
  margin-top: 0.25rem;
}

.page-about .about-hero__index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
  max-width: 720px;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-hero__index-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-right: 0.4rem;
}

.page-about .about-hero__index-link {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-size: 0.85rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15rem;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-hero__index-link:hover,
.page-about .about-hero__index-link.is-active {
  color: var(--color-yellow);
  border-bottom-color: var(--color-yellow);
}

/* ===== 01 品牌故事 ===== */
.page-about .about-story {
  padding: var(--page-gap) 0;
  background: var(--color-paper);
}

.page-about .about-story::before {
  content: "01";
}

.page-about .about-story__body {
  margin-top: 2.6rem;
  max-width: 760px;
}

.page-about .about-story__quote {
  margin: 2.2rem 0 2.2rem 1.2rem;
  padding: 0.3rem 0 0.3rem 1.4rem;
  border-left: 4px solid var(--color-blue);
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-blue);
}

.page-about .about-story__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 2.5rem;
  padding-left: 1.1rem;
  border-left: 4px solid var(--color-blue);
}

.page-about .about-story__fact-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-blue);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-about .about-story__fact-value {
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ===== 02 发展里程碑 ===== */
.page-about .about-milestone {
  position: relative;
  padding: var(--page-gap) 0;
  color: var(--color-white);
  background:
    radial-gradient(120% 80% at 85% 10%, rgba(30, 136, 199, 0.34) 0%, transparent 55%),
    radial-gradient(90% 70% at 10% 90%, rgba(232, 240, 76, 0.12) 0%, transparent 50%),
    var(--color-deep);
}

.page-about .about-milestone::before {
  content: "02";
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(5rem, 16vw, 13rem);
  line-height: 1;
  position: absolute;
  top: 0.6rem;
  right: -0.2rem;
  z-index: 0;
  pointer-events: none;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.13);
}

.page-about .about-milestone > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-milestone .section-eyebrow {
  color: var(--color-yellow);
  border-left-color: var(--color-blue);
}

.page-about .about-milestone .section-lead {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-milestone__head {
  margin-bottom: 2.8rem;
}

.page-about .about-milestone__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.page-about .about-milestone__timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.8rem;
  position: relative;
}

.page-about .about-milestone__timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.2rem;
  bottom: 0.4rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-blue) 0%, var(--color-mist) 60%, var(--color-yellow) 100%);
}

.page-about .milestone-item {
  position: relative;
  padding: 0 0 2.6rem 1.4rem;
}

.page-about .milestone-item:last-child {
  padding-bottom: 0.4rem;
}

.page-about .milestone-item::before {
  content: "";
  position: absolute;
  left: -1.8rem;
  top: 0.25rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--color-yellow);
  border: 3px solid var(--color-deep);
  outline: 2px solid var(--color-blue);
  box-sizing: border-box;
}

.page-about .milestone-item__year {
  display: inline-block;
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-yellow);
  margin-bottom: 0.35rem;
}

.page-about .milestone-item__body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.page-about .milestone-item__body p {
  font-size: 0.9rem;
  line-height: 1.58;
  opacity: 0.75;
}

.page-about .about-milestone__media {
  position: relative;
  margin: 0;
}

.page-about .about-milestone__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 4px;
  transform: rotate(-1.2deg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.page-about .about-milestone__media figcaption {
  font-size: 0.76rem;
  font-style: italic;
  opacity: 0.58;
  margin-top: 0.7rem;
}

/* ===== 03 服务能力 ===== */
.page-about .about-capability {
  padding: var(--page-gap) 0;
  background:
    repeating-linear-gradient(-45deg, transparent 0 18px, rgba(30, 136, 199, 0.035) 18px 19px),
    var(--color-paper);
}

.page-about .about-capability__head {
  max-width: 720px;
}

.page-about .capability-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 2.8rem;
}

.page-about .capability-metric {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-snow);
  border-left: 4px solid var(--color-blue);
  padding: 1.1rem 1rem 1rem;
  transform: skewX(-2deg);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .capability-metric:hover {
  transform: skewX(-2deg) translateY(-4px);
  box-shadow: 0 12px 30px rgba(11, 27, 43, 0.12);
}

.page-about .capability-metric--highlight {
  background: var(--color-yellow);
  border-left-color: var(--color-ink);
}

.page-about .capability-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.65rem;
  line-height: 1.1;
  color: var(--color-blue);
  margin-bottom: 0.3rem;
}

.page-about .capability-metric--highlight .capability-metric__num {
  color: var(--color-ink);
}

.page-about .capability-metric__label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-ink);
  opacity: 0.78;
}

.page-about .capability-services {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  margin-top: 2.8rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--color-snow);
}

.page-about .capability-service {
  position: relative;
  padding-top: 1.3rem;
  border-top: 3px solid var(--color-ink);
  background: var(--color-white);
  padding-left: 1.1rem;
  padding-right: 1rem;
  padding-bottom: 1.2rem;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 2px 0 rgba(11, 27, 43, 0.04);
}

.page-about .capability-service__icon {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--color-mist);
  color: var(--color-ink);
  padding: 0.22rem 0.5rem;
  margin-bottom: 0.75rem;
}

.page-about .capability-service h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-about .capability-service p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-ink);
  opacity: 0.78;
  margin: 0;
}

/* ===== 04 资质与合作 ===== */
.page-about .about-honor {
  padding: var(--page-gap) 0;
  background: var(--color-white);
  border-block: 2px solid var(--color-snow);
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.8rem;
  align-items: center;
}

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

.page-about .about-honor__list {
  list-style: none;
  margin: 1.8rem 0 1.4rem;
  padding: 0;
}

.page-about .honor-item {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed var(--color-snow);
}

.page-about .honor-item__tag {
  flex-shrink: 0;
  min-width: 3.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-white);
  background: var(--color-blue);
  padding: 0.18rem 0.45rem;
  border-radius: 2px;
  transform: skewX(-6deg);
}

.page-about .honor-item__text {
  font-size: 0.95rem;
  line-height: 1.45;
}

.page-about .about-honor__note {
  font-size: 0.86rem;
  line-height: 1.6;
  opacity: 0.72;
  margin: 1.4rem 0 0;
}

.page-about .about-honor__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.page-about .about-honor__media {
  position: relative;
  margin: 0;
}

.page-about .about-honor__media::before {
  content: "";
  position: absolute;
  inset: -0.8rem 0 0 -0.9rem;
  border-top: 3px solid var(--color-yellow);
  border-left: 3px solid var(--color-blue);
  border-radius: 10px 0 0 0;
}

.page-about .about-honor__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 30px 60px rgba(11, 27, 43, 0.16);
}

.page-about .about-honor__media figcaption {
  font-size: 0.78rem;
  font-style: italic;
  color: var(--color-ink);
  opacity: 0.6;
  margin-top: 0.8rem;
}

/* ===== 05 联系我们 ===== */
.page-about .about-contact {
  padding: var(--page-gap) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-paper) 0%, var(--color-mist) 100%);
}

.page-about .about-contact::before {
  right: 50%;
  transform: translateX(50%);
  -webkit-text-stroke: 1px rgba(11, 27, 43, 0.12);
}

.page-about .about-contact .section-lead {
  margin-left: auto;
  margin-right: auto;
}

.page-about .about-contact__channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 2.6rem auto;
  max-width: 820px;
  text-align: left;
}

.page-about .about-contact__channel {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-snow);
  border-radius: 6px;
  padding: 1.15rem 1.3rem;
  overflow: hidden;
}

.page-about .about-contact__channel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-blue);
}

.page-about .about-contact__label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-blue);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.page-about .about-contact__value {
  display: block;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  word-break: break-all;
}

.page-about .about-contact__action {
  margin-top: 1.8rem;
}

/* ===== 按钮页面化处理 ===== */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transform: skewX(-5deg);
  border: 2px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
  cursor: pointer;
}

.page-about .btn > * {
  transform: skewX(5deg);
}

.page-about .btn--yellow {
  background: var(--color-yellow);
  color: var(--color-ink);
}

.page-about .btn--yellow:hover {
  transform: skewX(-5deg) translateY(-2px);
  box-shadow: 0 10px 24px rgba(232, 240, 76, 0.28);
}

.page-about .btn--ghost {
  border-color: var(--color-ink);
  color: var(--color-ink);
  background: transparent;
}

.page-about .btn--ghost:hover {
  transform: skewX(-5deg) translateY(-2px);
  background: var(--color-ink);
  color: var(--color-white);
}

/* ===== 平板及以上 ===== */
@media (min-width: 768px) {
  .page-about .about-story__facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
  }

  .page-about .about-milestone__layout {
    grid-template-columns: 1.35fr 0.65fr;
    gap: 4rem;
  }

  .page-about .capability-metrics {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-about .capability-services {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-honor__grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .page-about .about-contact__channels {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-hero__title {
    font-size: clamp(3rem, 6.5vw, 5.4rem);
  }
}

/* ===== 桌面宽屏微调 ===== */
@media (min-width: 1200px) {
  .page-about .about-hero__inner {
    padding-bottom: calc(4vw + 3rem);
  }

  .page-about .about-story::before,
  .page-about .about-capability::before,
  .page-about .about-honor::before,
  .page-about .about-milestone::before {
    font-size: 14rem;
  }

  .page-about .about-milestone__media {
    margin-top: 3.2rem;
  }
}