/* ===== 页面专属样式：page-about ===== */
.page-about {
  --about-hero-radius: 36px;
  --about-tl-dot: 20px;
  --about-text-lg: rgba(255, 255, 255, 0.9);
  --about-text-md: rgba(255, 255, 255, 0.75);
  --about-text-sm: rgba(255, 255, 255, 0.6);
  --about-card-body: #3B465E;
  background: var(--c-page);
}

/* 面包屑条带 */
.page-about-meta {
  background: var(--c-page);
  border-bottom: 1px solid rgba(11, 27, 63, 0.08);
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 13px;
  color: var(--c-muted);
}

.page-about .breadcrumbs a {
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about .breadcrumbs a:hover {
  color: var(--c-highlight);
}

/* 首屏：错位色块标题 */
.page-about-hero {
  position: relative;
  background: var(--c-primary);
  overflow: hidden;
}

.page-about-hero::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -90px;
  width: 280px;
  height: 430px;
  background: var(--c-highlight);
  clip-path: polygon(30% 0, 100% 0, 100% 70%, 0 100%);
  opacity: 0.9;
  z-index: 0;
}

.page-about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-highlight), var(--c-purple));
  z-index: 2;
}

.page-about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
  padding: 48px 0 72px;
}

.page-about-hero__title-block {
  background: linear-gradient(140deg, var(--c-primary-2), var(--c-dark));
  border: 1px solid rgba(155, 89, 182, 0.45);
  border-radius: var(--radius-lg);
  padding: 36px 28px 44px;
  transform: rotate(-1.4deg);
  box-shadow: var(--shadow-md);
}

.page-about-hero__tag {
  display: inline-block;
  background: var(--c-highlight);
  color: var(--c-white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
}

.page-about-hero__title {
  font-family: var(--font-head);
  font-size: var(--fs-h1);
  line-height: 1.12;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-about-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-text-lg);
  max-width: 660px;
  margin: 0;
}

.page-about-hero__aside {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: var(--radius-md);
  padding: 26px 26px 30px;
  transform: rotate(1.2deg);
}

.page-about-hero__aside p {
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 20px;
  color: var(--about-text-lg);
}

/* 品牌概况 */
.page-about-intro__grid {
  display: grid;
  gap: 28px;
}

.page-about-intro__cards {
  display: grid;
  gap: 20px;
}

.page-about-intro__card {
  position: relative;
  background: var(--c-card);
  border-radius: var(--radius-md);
  padding: 28px 28px 34px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.page-about-intro__card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 56px;
  height: 56px;
  background: var(--c-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.6;
}

.page-about-intro__card:nth-child(2) {
  margin-left: 16px;
}

.page-about-intro__card h3 {
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--c-primary);
  margin: 0 0 12px;
  line-height: 1.4;
}

.page-about-intro__card p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-card-body);
  margin: 0 0 16px;
}

.page-about-intro__more {
  display: inline-block;
  font-weight: 700;
  font-size: 14px;
  color: var(--c-highlight);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.page-about-intro__more:hover {
  border-bottom-color: var(--c-highlight);
}

.page-about-intro__feature {
  position: relative;
  background: var(--c-dark);
  color: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  overflow: hidden;
}

.page-about-intro__feature::before {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 150px;
  height: 150px;
  background: var(--c-purple);
  border-radius: 50%;
  opacity: 0.4;
}

.page-about-intro__feature::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-highlight), var(--c-purple));
}

.page-about-intro__feature h3 {
  position: relative;
  font-family: var(--font-head);
  font-size: 20px;
  margin: 0 0 14px;
  z-index: 1;
}

.page-about-intro__feature p {
  position: relative;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text-md);
  margin: 0 0 20px;
  z-index: 1;
}

.page-about-intro__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about-intro__list li {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--about-text-lg);
}

.page-about-intro__list li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
}

/* 发展历程时间轴 */
.page-about-timeline__list {
  position: relative;
  display: grid;
  gap: 20px;
  margin-top: 32px;
}

.page-about-timeline__list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 40px;
  bottom: 40px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--c-accent) 0%, var(--c-highlight) 55%, var(--c-purple) 100%);
}

.page-about-timeline__item {
  position: relative;
  padding-left: 44px;
}

.page-about-timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 28px;
  width: var(--about-tl-dot);
  height: var(--about-tl-dot);
  border-radius: 50%;
  background: var(--c-primary);
  border: 6px solid var(--c-accent);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.2);
}

.page-about-timeline__item--now::before {
  border-color: var(--c-highlight);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.25);
}

.page-about-timeline__year {
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--c-accent);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.page-about-timeline__item--now .page-about-timeline__year {
  color: var(--c-highlight);
}

.page-about-timeline__card {
  background: var(--c-primary-2);
  border: 1px solid rgba(57, 255, 20, 0.16);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about-timeline__card:hover {
  transform: translateX(6px);
  border-color: rgba(57, 255, 20, 0.5);
}

.page-about-timeline__card h3 {
  font-family: var(--font-head);
  font-size: 16px;
  color: var(--c-white);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about-timeline__card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text-md);
  margin: 0;
}

/* 数据实力 */
.page-about-stats__grid {
  display: grid;
  gap: 28px;
}

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

.page-about-stats__metric {
  background: var(--c-white);
  border-radius: var(--radius-md);
  padding: 24px 18px 22px;
  text-align: center;
  border-bottom: 4px solid var(--c-accent);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.page-about-stats__metric:nth-child(even) {
  border-bottom-color: var(--c-highlight);
}

.page-about-stats__num {
  display: block;
  font-family: var(--font-head);
  font-size: 32px;
  color: var(--c-primary);
  letter-spacing: -0.02em;
}

.page-about-stats__unit {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-highlight);
  margin-top: 4px;
  margin-bottom: 10px;
}

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

.page-about-stats__chart {
  background: var(--c-primary);
  border-radius: var(--radius-lg);
  margin: 0;
  padding: 20px 20px 16px;
}

.page-about-stats__chart img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.page-about-stats__chart figcaption {
  color: var(--about-text-sm);
  font-size: 13px;
  text-align: center;
  padding: 14px 0 4px;
}

/* 服务承诺 */
.page-about-promises__grid {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}

.page-about-promises__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  clip-path: polygon(0 4%, 100% 0, 96% 100%, 0 96%);
}

.page-about-promises__figure img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 200px;
  object-fit: cover;
}

.page-about-promises__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about-promises__item {
  display: flex;
  gap: 16px;
  background: var(--c-primary-2);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--c-accent);
  padding: 20px 20px 22px;
  transition: transform 0.3s ease;
}

.page-about-promises__item:hover {
  transform: translateX(4px);
}

.page-about-promises__item:nth-child(even) {
  border-left-color: var(--c-highlight);
}

.page-about-promises__index {
  flex: none;
  display: block;
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--c-accent);
  padding-top: 2px;
}

.page-about-promises__item:nth-child(even) .page-about-promises__index {
  color: var(--c-highlight);
}

.page-about-promises__body h3 {
  font-family: var(--font-head);
  font-size: 16px;
  color: var(--c-white);
  margin: 0 0 6px;
  line-height: 1.4;
}

.page-about-promises__body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text-md);
  margin: 0;
}

/* 资质与认证 */
.page-about-legal__grid {
  display: grid;
  gap: 28px;
}

.page-about-legal__badge {
  background: var(--c-dark);
  border-radius: var(--radius-lg);
  margin: 0;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.page-about-legal__badge img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
}

.page-about-legal__badge figcaption {
  color: var(--c-muted);
  font-size: 13px;
  text-align: center;
  margin-top: 12px;
}

.page-about-legal__content {
  display: grid;
  gap: 16px;
}

.page-about-legal__item {
  position: relative;
  background: var(--c-card);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  overflow: hidden;
}

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

.page-about-legal__item:nth-child(2)::before {
  background: var(--c-accent);
}

.page-about-legal__item:nth-child(3)::before {
  background: var(--c-highlight);
}

.page-about-legal__item h3 {
  font-family: var(--font-head);
  font-size: 17px;
  color: var(--c-primary);
  margin: 0 0 8px;
}

.page-about-legal__item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-card-body);
  margin: 0;
}

.page-about-legal__item a {
  color: var(--c-highlight);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.page-about-legal__item a:hover {
  border-bottom-color: var(--c-highlight);
}

/* ===== 桌面端适配 ===== */
@media (min-width: 960px) {
  .page-about-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: end;
    gap: 48px;
    padding: 56px 0 96px;
  }

  .page-about-hero__title-block {
    padding: 44px 40px 52px;
  }

  .page-about-hero__aside {
    padding: 32px 30px 36px;
  }

  .page-about-intro__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
    gap: 32px;
  }

  .page-about-intro__feature {
    margin-top: 0;
  }

  .page-about-timeline__list {
    gap: 28px;
  }

  .page-about-timeline__list::before {
    left: 180px;
  }

  .page-about-timeline__item {
    display: grid;
    grid-template-columns: 160px 1fr;
    column-gap: 40px;
    padding-left: 0;
  }

  .page-about-timeline__item::before {
    left: 170px;
    top: 30px;
  }

  .page-about-timeline__year {
    text-align: right;
    font-size: 26px;
    margin-bottom: 0;
    padding-top: 18px;
  }

  .page-about-timeline__card {
    margin-left: 20px;
  }

  .page-about-stats__grid {
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
    gap: 48px;
  }

  .page-about-stats__metrics {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about-stats__metric {
    padding: 28px 16px;
  }

  .page-about-stats__num {
    font-size: 36px;
  }

  .page-about-promises__grid {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: center;
    gap: 48px;
  }

  .page-about-promises__figure {
    clip-path: polygon(0 6%, 100% 0, 94% 100%, 0 94%);
  }

  .page-about-legal__grid {
    grid-template-columns: 0.75fr 1.25fr;
    align-items: center;
    gap: 48px;
  }

  .page-about-legal__badge {
    padding: 40px 32px;
  }
}

@media (min-width: 1240px) {
  .page-about-hero__title-block {
    transform: rotate(-1.2deg) translateX(-12px);
  }

  .page-about-hero__aside {
    transform: rotate(1deg) translateX(12px);
  }

  .page-about-stats__metric:nth-child(2) {
    transform: translateY(8px);
  }

  .page-about-stats__metric:nth-child(2):hover {
    transform: translateY(4px);
  }

  .page-about-promises__item:nth-child(even) {
    margin-left: 24px;
  }
}