.page-about {
  --about-grid-line: rgba(96, 165, 250, 0.045);
  --about-card-glare: rgba(96, 165, 250, 0.08);
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  background-color: var(--c-primary-900);
  color: var(--c-neutral-100);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: var(--space-4) 0 var(--space-2);
}

.page-about .breadcrumb__item {
  color: var(--c-primary-300);
}

.page-about .breadcrumb__item a {
  color: var(--c-primary-300);
  text-decoration: none;
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--c-yellow);
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  font-style: italic;
  letter-spacing: -0.02em;
}

.page-about a {
  color: var(--c-primary-300);
}

.page-about .btn {
  font-family: var(--font-heading);
  font-style: normal;
  letter-spacing: 0.02em;
}

.page-about .btn--ghost {
  border-color: var(--c-primary-300);
  color: var(--c-primary-300);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--c-yellow);
  color: var(--c-yellow);
}

/* ========== 首屏 ========== */
.about-hero {
  position: relative;
  padding: var(--space-5) 0 var(--space-6);
}

.about-hero::before {
  content: "";
  position: absolute;
  top: 28px;
  right: 0;
  width: 62%;
  height: calc(100% - 48px);
  background: var(--c-primary-700);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 90%);
  opacity: 0.55;
  z-index: 0;
}

.about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-5);
}

.about-hero__copy {
  position: relative;
  padding: var(--space-5) var(--space-4);
  background: linear-gradient(135deg, rgba(23, 42, 69, 0.92) 0%, rgba(10, 25, 47, 0.55) 70%);
  border-left: 4px solid var(--c-yellow);
  backdrop-filter: blur(4px);
  clip-path: polygon(0 0, 100% 0, 97% 100%, 0 100%);
}

.about-hero__eyebrow {
  margin-bottom: var(--space-3);
  display: inline-block;
}

.about-hero__copy h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.1;
  margin: 0 0 var(--space-4);
  color: var(--c-neutral-100);
}

.about-hero__title-accent {
  display: block;
  color: var(--c-yellow);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
}

.about-hero__lead {
  font-size: 1.05rem;
  color: var(--c-neutral-200);
  margin: 0 0 var(--space-4);
  max-width: 42em;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.about-hero__proof {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.about-hero__proof-item {
  padding: var(--space-4);
  background: rgba(23, 42, 69, 0.72);
  border: 1px solid rgba(96, 165, 250, 0.18);
  backdrop-filter: blur(4px);
  transform: skewX(-2deg);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.about-hero__proof-item:hover,
.about-hero__proof-item:focus-within {
  transform: skewX(0deg);
  border-color: var(--c-yellow);
}

.about-hero__proof-item strong {
  display: block;
  font-family: var(--font-heading);
  font-style: italic;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.2;
  color: var(--c-yellow);
}

.about-hero__proof-item--teal strong {
  color: var(--c-teal);
}

.about-hero__proof-item span {
  display: block;
  font-size: 0.9rem;
  color: var(--c-neutral-200);
  margin-top: var(--space-1);
}

/* ========== 品牌溯源 ========== */
.about-origin {
  padding-top: var(--space-6);
}

.about-origin__grid {
  display: grid;
  gap: var(--space-5);
}

.about-origin__content h2,
.about-milestones__header h2,
.about-capabilities h2,
.about-team h2,
.about-eco h2,
.about-certifications h2 {
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  line-height: 1.15;
  margin: var(--space-2) 0 var(--space-3);
  color: var(--c-neutral-100);
}

.about-origin__content p,
.about-team__content p {
  margin: 0 0 var(--space-4);
  color: var(--c-neutral-200);
}

.about-origin__content blockquote {
  margin: var(--space-4) 0 0;
  padding: var(--space-4);
  border-left: 4px solid var(--c-teal);
  background: rgba(13, 148, 136, 0.08);
  font-size: 1.05rem;
  color: var(--c-neutral-200);
}

.about-origin__visual {
  margin: 0;
}

.about-origin__visual img,
.about-milestones__figure img,
.about-team__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.about-origin__visual figcaption,
.about-milestones__figure figcaption,
.about-team__visual figcaption {
  padding-top: var(--space-2);
  font-size: 0.88rem;
  color: var(--c-primary-300);
}

/* ========== 发展历程 ========== */
.about-milestones {
  padding-top: var(--space-6);
}

.about-milestones__header .section-lead,
.about-capabilities .section-lead,
.about-eco .section-lead,
.about-certifications .section-lead {
  max-width: 56em;
  color: var(--c-neutral-200);
  margin-bottom: var(--space-5);
}

.about-milestones__svground {
  overflow-x: auto;
  padding-bottom: var(--space-3);
  margin: 0 calc(-1 * var(--space-3)) var(--space-4);
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.about-milestones__svg {
  display: block;
  min-width: 720px;
  width: 100%;
  height: auto;
}

.about-milestones__svg-label {
  fill: var(--c-neutral-100);
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
}

.about-milestones__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.about-milestones__item {
  padding: var(--space-4);
  background: rgba(23, 42, 69, 0.6);
  border-left: 3px solid var(--c-primary-300);
  border-radius: 2px;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.about-milestones__item:hover,
.about-milestones__item:focus-within {
  transform: translateX(4px);
  background: rgba(23, 42, 69, 0.85);
  border-color: var(--c-yellow);
}

.about-milestones__item p {
  margin: var(--space-2) 0 0;
  color: var(--c-neutral-200);
}

.about-milestones__item--latest {
  border-color: var(--c-yellow);
}

.about-milestones__figure {
  margin: var(--space-5) 0 0;
}

/* ========== 核心服务能力 ========== */
.about-capabilities {
  padding-top: var(--space-6);
}

.about-capabilities__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.about-capabilities__card {
  position: relative;
  overflow: hidden;
  padding: var(--space-5) var(--space-4);
  border-radius: 2px;
}

.about-capabilities__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, rgba(96, 165, 250, 0.1) 0%, transparent 55%);
  pointer-events: none;
}

.about-capabilities__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 100%;
  background: var(--about-card-glare);
  transform: skewY(-8deg) translateX(10px);
}

.about-capabilities__num {
  display: block;
  font-family: var(--font-heading);
  font-style: italic;
  font-size: clamp(2.5rem, 6vw, 3.8rem);
  line-height: 1.1;
  color: var(--c-yellow);
  margin-bottom: var(--space-2);
}

.about-capabilities__card h3 {
  font-size: 1.15rem;
  margin: 0 0 var(--space-2);
  color: var(--c-neutral-100);
}

.about-capabilities__card p {
  margin: 0;
  color: var(--c-neutral-200);
  font-size: 0.95rem;
}

/* ========== 团队与组织形态 ========== */
.about-team {
  padding-top: var(--space-6);
}

.about-team__grid {
  display: grid;
  gap: var(--space-5);
}

.about-team__visual {
  margin: 0;
}

.about-team__facts {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.about-team__fact {
  padding: var(--space-3);
  background: rgba(13, 148, 136, 0.1);
  border-radius: 2px;
}

.about-team__fact p {
  margin: var(--space-2) 0 0;
  font-size: 0.92rem;
  color: var(--c-neutral-200);
}

/* ========== 合作伙伴与生态 ========== */
.about-eco {
  padding-top: var(--space-6);
}

.about-eco__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.about-eco__item {
  padding: var(--space-5) var(--space-4);
  background: rgba(23, 42, 69, 0.6);
  border: 1px solid rgba(96, 165, 250, 0.18);
  border-radius: 2px;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.about-eco__item:hover,
.about-eco__item:focus-within {
  transform: translateY(-4px);
  border-color: var(--c-teal);
  background: rgba(23, 42, 69, 0.9);
}

.about-eco__glyph {
  width: 64px;
  height: 64px;
  color: var(--c-primary-300);
  margin-bottom: var(--space-3);
}

.about-eco__item h3 {
  font-size: 1.15rem;
  margin: 0 0 var(--space-2);
  color: var(--c-neutral-100);
}

.about-eco__item p {
  margin: 0;
  color: var(--c-neutral-200);
  font-size: 0.95rem;
}

/* ========== 认证与荣誉 ========== */
.about-certifications {
  padding-top: var(--space-6);
}

.about-certifications__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.about-certifications__card {
  padding: var(--space-5) var(--space-4);
  border-radius: 2px;
}

.about-certifications__card h3 {
  font-size: 1.2rem;
  margin: 0 0 var(--space-2);
  color: var(--c-neutral-100);
}

.about-certifications__card p {
  margin: 0;
  color: var(--c-neutral-200);
  font-size: 0.95rem;
}

.about-certifications__privacy {
  margin-top: var(--space-4);
  color: var(--c-neutral-200);
}

.about-certifications__privacy a {
  color: var(--c-yellow);
  font-weight: 600;
}

/* ========== 支持 CTA ========== */
.about-help {
  padding-top: var(--space-5);
  padding-bottom: var(--space-7);
}

.about-help__inner {
  padding: var(--space-5) var(--space-4);
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.16) 0%, rgba(10, 25, 47, 0.7) 60%);
  border-top: 4px solid var(--c-yellow);
  border-radius: 2px;
  display: grid;
  gap: var(--space-4);
}

.about-help__content h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin: 0 0 var(--space-2);
  color: var(--c-neutral-100);
}

.about-help__content p {
  margin: 0;
  color: var(--c-neutral-200);
}

.about-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ========== 滚动显现兼容 ========== */
.page-about [data-reveal] {
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ========== 桌面端增强 ========== */
@media (min-width: 900px) {
  .about-hero {
    padding: var(--space-7) 0 var(--space-7);
  }

  .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: stretch;
    gap: var(--space-6);
  }

  .about-hero__copy {
    padding: var(--space-6) var(--space-5);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .about-hero__proof {
    align-content: center;
    gap: var(--space-4);
  }

  .about-hero__proof-item {
    padding: var(--space-5);
  }

  .about-hero__proof-item:nth-child(2) {
    transform: translateX(12px) skewX(-2deg);
  }

  .about-hero__proof-item:nth-child(3) {
    transform: translateX(-8px) skewX(-2deg);
  }

  .about-hero__proof-item:nth-child(2):hover,
  .about-hero__proof-item:nth-child(3):hover {
    transform: translateX(0) skewX(0deg);
  }

  .about-origin__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: var(--space-6);
  }

  .about-origin__visual img {
    min-height: 320px;
  }

  .about-milestones__svground {
    margin: 0 0 var(--space-5);
    padding: 0;
  }

  .about-milestones__svg {
    min-width: 0;
  }

  .about-milestones__list {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .about-milestones__item {
    padding: var(--space-5) var(--space-4);
  }

  .about-capabilities__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  .about-capabilities__card {
    padding: var(--space-6) var(--space-4);
    min-height: 260px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }

  .about-team__grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: var(--space-6);
  }

  .about-team__visual img {
    min-height: 260px;
  }

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

  .about-eco__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .about-eco__item {
    padding: var(--space-6) var(--space-5);
    min-height: 240px;
  }

  .about-certifications__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .about-certifications__card {
    padding: var(--space-6) var(--space-5);
  }

  .about-help__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-6) var(--space-5);
  }

  .about-help__actions {
    justify-content: flex-end;
  }
}