/* =====================================================
   品牌故事页 page-about 专属样式
   作用域：.page-about
   ===================================================== */

/* ---------- 页面级基础调整 ---------- */
.page-about {
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about h2 {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 8px 0 14px;
  color: var(--deep-blue);
}

.page-about .index-label {
  color: var(--orange);
  margin-bottom: 10px;
}

/* ---------- Hero / 品牌导语 ---------- */
.page-about-hero {
  position: relative;
  padding: 48px 0 64px;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(255, 107, 0, 0.22) 0%, transparent 55%),
    linear-gradient(135deg, #0A1E3F 0%, #10294f 60%, #173a6e 100%);
  color: #fff;
  overflow: hidden;
}

.page-about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 48%;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    rgba(255, 107, 0, 0.07) 0,
    rgba(255, 107, 0, 0.07) 1px,
    transparent 1px,
    transparent 12px
  );
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about-hero::after {
  content: "";
  position: absolute;
  bottom: -96px;
  left: 6%;
  width: 220px;
  height: 220px;
  border: 3px solid rgba(255, 196, 0, 0.28);
  border-radius: 50%;
  pointer-events: none;
}

.page-about-hero__split {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about-hero__copy {
  max-width: 660px;
}

.page-about-hero .breadcrumb {
  margin-bottom: 20px;
}

.page-about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.25s var(--ease-out);
}

.page-about-hero .breadcrumb a:hover {
  color: var(--yellow);
}

.page-about-hero .breadcrumb__sep {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 14px;
}

.page-about-hero .breadcrumb [aria-current="page"] {
  color: var(--yellow);
  font-weight: 700;
  font-size: 14px;
}

.page-about-hero .index-label {
  color: var(--yellow);
  margin-bottom: 14px;
}

.page-about-hero h1 {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: #fff;
}

.page-about-hero h1 .accent {
  color: var(--orange);
}

.page-about-hero__lede {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 28px;
  max-width: 560px;
}

.page-about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about-hero__actions .btn--ghost {
  border-color: rgba(255, 255, 255, 0.65);
  color: #fff;
}

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

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

.page-about-hero__art::before {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 44px;
  height: 44px;
  border-top: 3px solid var(--yellow);
  border-right: 3px solid var(--yellow);
  border-radius: 0 6px 0 0;
  opacity: 0.75;
  z-index: 2;
  pointer-events: none;
}

.page-about-hero__art::after {
  content: "";
  position: absolute;
  left: -14px;
  bottom: -14px;
  width: 72px;
  height: 72px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  opacity: 0.55;
  z-index: -1;
}

.page-about-hero__art img {
  display: block;
  width: 100%;
  border-radius: 14px 14px 14px 0;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

/* ---------- 01 起源 ---------- */
.page-about-origin {
  background: var(--light-orange);
}

.page-about-aside-note {
  font-family: var(--font-index);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
  margin: 4px 0 0;
}

.page-about-lead {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--deep-blue);
  margin: 0 0 16px;
}

.page-about-origin .layout-editorial__content p:not(.page-about-lead) {
  font-size: 16px;
  line-height: 1.8;
  color: var(--dark);
  margin: 0 0 16px;
}

.page-about-origin__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
  max-width: 560px;
}

@media (min-width: 520px) {
  .page-about-origin__stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about-stat {
  background: var(--white);
  border-left: 4px solid var(--orange);
  border-radius: 0 12px 0 12px;
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.page-about-stat__num {
  display: block;
  font-family: var(--font-index);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.2;
  color: var(--deep-blue);
}

.page-about-stat__label {
  display: block;
  font-size: 13px;
  color: var(--gray);
  margin-top: 4px;
}

/* ---------- 02 时间轴 ---------- */
.page-about-timeline {
  background: var(--deep-blue);
  color: #fff;
}

.page-about-timeline .index-label {
  color: var(--yellow);
}

.page-about-timeline h2 {
  color: #fff;
}

.page-about-timeline__head > p:last-child {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 0 40px;
}

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

.page-about-timeline__item {
  position: relative;
  padding-left: 32px;
  padding-bottom: 36px;
}

.page-about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about-timeline__item::before {
  content: "";
  position: absolute;
  left: 39px;
  top: 26px;
  bottom: -8px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--orange) 0%, rgba(255, 107, 0, 0.15) 100%);
  z-index: 0;
}

.page-about-timeline__item:last-child::before {
  display: none;
}

.page-about-timeline__marker {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about-timeline__dot {
  order: -1;
  position: static;
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--yellow);
  border: 3px solid var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.18);
}

.page-about-timeline__version {
  font-family: var(--font-index);
  font-weight: 700;
  font-size: 15px;
  color: var(--orange);
  background: rgba(255, 107, 0, 0.14);
  padding: 4px 12px;
  border-radius: 4px 4px 4px 0;
  letter-spacing: 0.02em;
}

.page-about-timeline__card {
  margin: 0;
  padding: 22px 24px;
}

.page-about-timeline__card .tag {
  display: inline-block;
}

.page-about-timeline__card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--deep-blue);
}

.page-about-timeline__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 03 服务范围 ---------- */
.page-about-scope {
  background: var(--light-orange);
}

.page-about-scope__head > p:last-child {
  font-size: 16px;
  color: var(--gray);
  margin: 0 0 36px;
}

.page-about-scope__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about-scope__content {
  max-width: 640px;
}

.page-about-scope__content p:not(.page-about-lead) {
  font-size: 16px;
  line-height: 1.8;
  color: var(--dark);
  margin: 0 0 16px;
}

.page-about-scope__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}

.page-about-scope__map {
  margin: 0;
}

.page-about-scope__map img {
  display: block;
  width: 100%;
  border-radius: 14px 14px 14px 0;
  box-shadow: var(--shadow-md);
  background: var(--white);
  object-fit: cover;
}

.page-about-scope__map figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-index);
  font-size: 13px;
  color: var(--gray);
}

/* ---------- 04 版本体系 ---------- */
.page-about-version {
  background: var(--deep-blue);
  color: #fff;
}

.page-about-version .index-label {
  color: var(--yellow);
}

.page-about-version h2 {
  color: #fff;
}

.page-about-version__head > p:last-child {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  margin: 0 0 36px;
}

.page-about-version__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about-version__badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px 32px;
  border-radius: 10px 10px 10px 0;
  background: linear-gradient(135deg, var(--orange) 0%, var(--deep-orange) 100%);
  box-shadow: var(--shadow-lg);
  margin-bottom: 22px;
  max-width: 340px;
}

.page-about-version__badge-label {
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.85);
}

.page-about-version__badge-num {
  font-family: var(--font-index);
  font-weight: 700;
  font-size: 40px;
  line-height: 1.1;
  margin: 6px 0;
  color: #fff;
}

.page-about-version__badge-meta {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
}

.page-about-version__summary > p {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 14px;
}

.page-about-version__products h3 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 22px;
  color: #fff;
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 4px solid var(--orange);
}

.page-about-version__item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px 14px 6px 14px;
  margin-bottom: 10px;
  transition: border-color 0.3s var(--ease-out);
}

.page-about-version__item[open] {
  border-color: rgba(255, 107, 0, 0.45);
  background: rgba(255, 255, 255, 0.08);
}

.page-about-version__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  user-select: none;
}

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

.page-about-version__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-index);
  font-size: 20px;
  font-weight: 400;
  color: var(--orange);
  transition: transform 0.25s var(--ease-out);
}

.page-about-version__item[open] summary::after {
  content: "−";
}

.page-about-version__prod-num {
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
  background: rgba(255, 107, 0, 0.16);
  padding: 3px 8px;
  border-radius: 4px 4px 4px 0;
  flex-shrink: 0;
}

.page-about-version__item p {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
}

/* ---------- 05 资质与生态 ---------- */
.page-about-qualifications {
  background: var(--light-orange);
}

.page-about-qualifications__head > p:last-child {
  font-size: 16px;
  color: var(--gray);
  margin: 0 0 36px;
}

.page-about-qualifications__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about-qualifications__certs {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about-qualification {
  display: grid;
  grid-template-columns: 56px 1fr;
  grid-template-rows: auto auto;
  gap: 4px 16px;
  align-items: start;
  padding: 20px 22px;
  margin: 0;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

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

.page-about-qualification__icon {
  grid-row: 1 / 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--deep-blue);
  color: var(--yellow);
  font-family: var(--font-index);
  font-weight: 700;
  font-size: 13px;
  border-radius: 8px 8px 8px 0;
  transition: transform 0.25s var(--ease-out), background 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

.page-about-qualification__icon:hover {
  transform: rotate(-5deg) scale(1.06);
  background: var(--orange);
  color: #fff;
}

.page-about-qualification h3 {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  color: var(--deep-blue);
}

.page-about-qualification p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--gray);
}

.page-about-qualifications__ecosystem {
  max-width: 640px;
}

.page-about-qualifications__image {
  margin: 0 0 18px;
}

.page-about-qualifications__image img {
  display: block;
  width: 100%;
  max-width: 500px;
  border-radius: 14px 14px 14px 0;
  box-shadow: var(--shadow-md);
  background: var(--white);
}

.page-about-qualifications__ecosystem > p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--dark);
  margin: 0 0 14px;
}

.page-about-qualifications__trust {
  font-size: 14px !important;
  color: var(--gray) !important;
  font-family: var(--font-index);
  line-height: 1.7 !important;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.65);
  border-radius: 0 10px 0 10px;
  border-left: 3px solid var(--orange);
  margin: 18px 0 !important;
}

.page-about-qualifications__ecosystem .btn {
  margin-top: 8px;
}

/* ---------- 底部 CTΑ ---------- */
.page-about-cta {
  background: var(--deep-blue);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.page-about-cta::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border: 3px solid rgba(255, 196, 0, 0.18);
  border-radius: 50%;
  pointer-events: none;
}

.page-about-cta::after {
  content: "";
  position: absolute;
  left: 8%;
  bottom: -40px;
  width: 120px;
  height: 120px;
  background: rgba(255, 107, 0, 0.16);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about-cta .index-label {
  color: var(--yellow);
}

.page-about-cta h2 {
  color: #fff;
  font-size: clamp(24px, 3.4vw, 34px);
  margin: 8px 0 0;
}

.page-about-cta__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.page-about-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 12px;
}

.page-about-cta__links .btn--ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

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

/* ---------- 桌面端适配 ---------- */
@media (min-width: 768px) {
  .page-about-hero {
    padding: 72px 0 96px;
  }

  .page-about-hero__split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: center;
  }

  .page-about-hero__copy {
    max-width: 640px;
  }

  .page-about-hero__art {
    margin: 0;
  }

  .page-about-origin,
  .page-about-timeline,
  .page-about-scope,
  .page-about-version,
  .page-about-qualifications,
  .page-about-cta {
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .page-about-timeline__head > p:last-child,
  .page-about-scope__head > p:last-child,
  .page-about-version__head > p:last-child,
  .page-about-qualifications__head > p:last-child {
    margin: 0 0 48px;
  }

  .page-about-timeline__item {
    display: grid;
    grid-template-columns: 140px 1fr;
    column-gap: 28px;
    padding-left: 0;
    padding-bottom: 44px;
  }

  .page-about-timeline__item::before {
    left: 140px;
    top: 34px;
    bottom: -12px;
  }

  .page-about-timeline__marker {
    position: relative;
    justify-content: flex-end;
    gap: 0;
    padding-right: 0;
    margin-bottom: 0;
    min-height: 62px;
  }

  .page-about-timeline__dot {
    position: absolute;
    order: 0;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
  }

  .page-about-timeline__version {
    order: -1;
    margin-right: 20px;
  }

  .page-about-timeline__card h3 {
    font-size: 20px;
  }

  .page-about-scope__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about-scope__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about-version__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 48px;
    align-items: start;
  }

  .page-about-qualifications__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about-hero__split {
    gap: 64px;
  }

  .page-about-hero__actions .btn {
    padding: 14px 28px;
    font-size: 16px;
  }

  .page-about-timeline__item {
    grid-template-columns: 160px 1fr;
    column-gap: 36px;
  }

  .page-about-timeline__item::before {
    left: 160px;
  }

  .page-about-scope__grid {
    gap: 64px;
  }

  .page-about-version__grid {
    gap: 64px;
  }

  .page-about-qualifications__grid {
    gap: 64px;
  }
}