/* ============================================
   品牌概况 / page-about 专属样式
   ============================================ */

.page-about {
  --about-shadow-card: 0 10px 0 rgba(0, 0, 0, 0.35);
  --about-shadow-hover: 0 18px 0 rgba(0, 0, 0, 0.45);
  background: var(--midnight-navy);
  color: var(--pure-white);
}

/* ---------- 面包屑 ---------- */

.page-about .breadcrumb {
  position: relative;
  z-index: 3;
  padding-top: 1rem;
  padding-bottom: 0.25rem;
  color: var(--steel-blue);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

.page-about .breadcrumb-link {
  color: var(--steel-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.page-about .breadcrumb-sep {
  margin: 0 0.25rem;
  color: var(--steel-blue);
}

.page-about .breadcrumb-current {
  color: var(--pure-white);
}

/* ---------- 首屏封面 ---------- */

.page-about .about-hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--midnight-navy);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
}

.page-about .about-hero__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 27, 61, 0.12) 0%, rgba(10, 27, 61, 0.84) 100%),
    linear-gradient(90deg, rgba(255, 107, 26, 0.18) 0%, transparent 48%);
}

.page-about .about-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-top: var(--space-xl);
  padding-bottom: var(--space-lg);
}

.page-about .about-hero__index {
  display: inline-block;
  font-family: var(--font-numeric);
  font-size: 0.875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--success);
  border: 1px solid var(--success);
  padding: 0.375rem 0.75rem;
  margin-bottom: var(--space-md);
  background: rgba(57, 255, 136, 0.06);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 var(--space-md);
  max-width: 16em;
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.7;
  color: rgba(229, 233, 240, 0.9);
  max-width: 36em;
  margin: 0 0 var(--space-lg);
}

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

/* ---------- 页内索引 ---------- */

.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(74, 107, 154, 0.45);
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  color: var(--steel-blue);
  text-decoration: none;
  border: 1px solid rgba(74, 107, 154, 0.5);
  padding: 0.375rem 0.75rem;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.page-about .about-index__item:hover {
  color: var(--pure-white);
  border-color: var(--accent);
  background: rgba(255, 107, 26, 0.08);
}

.page-about .about-index__num {
  font-family: var(--font-numeric);
  font-weight: 700;
  color: var(--accent);
}

/* ---------- 展区标签 ---------- */

.page-about .about-mission__label,
.page-about .about-history__label,
.page-about .about-caps__label,
.page-about .about-users__label,
.page-about .about-ops__label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.page-about .about-mission__tag,
.page-about .about-history__tag,
.page-about .about-caps__tag,
.page-about .about-users__tag,
.page-about .about-ops__tag {
  font-size: 0.875rem;
  color: var(--steel-blue);
  letter-spacing: 0.12em;
  border-left: 2px solid var(--accent);
  padding-left: 0.5rem;
}

.page-about .section-number {
  display: inline-block;
  font-family: var(--font-numeric);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.2;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2rem 0.5rem;
  background: rgba(255, 107, 26, 0.06);
}

.page-about .section-title {
  margin: 0 0 var(--space-sm);
}

.page-about .section-desc {
  color: var(--steel-blue);
  max-width: 54em;
  margin: 0;
}

/* ---------- 01 品牌与使命 ---------- */

.page-about .about-mission {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.page-about .about-mission__content {
  max-width: 760px;
}

.page-about .about-mission__lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--pure-white);
  border-left: 3px solid var(--accent);
  padding-left: var(--space-md);
  margin: 0 0 var(--space-sm);
}

.page-about .about-mission__text {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(229, 233, 240, 0.86);
  margin: 0;
}

.page-about .about-mission__cards {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.page-about .about-mission-card {
  background: var(--bg-card);
  border: 2px solid var(--line-grey);
  box-shadow: var(--about-shadow-card);
  padding: var(--space-md);
  position: relative;
  transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
}

.page-about .about-mission-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-hover);
  border-color: var(--accent);
}

.page-about .about-mission-card__title {
  display: block;
  margin: 0.375rem 0 0.375rem;
  font-size: 1.125rem;
  font-weight: 700;
}

.page-about .about-mission-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(229, 233, 240, 0.75);
}

@media (min-width: 720px) {
  .page-about .about-mission__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-mission {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--space-lg);
    align-items: start;
  }
}

/* ---------- 02 发展历程 ---------- */

.page-about .about-history {
  position: relative;
  padding: var(--space-xl) 0;
  background: var(--deep-blue);
  overflow: hidden;
}

.page-about .about-history__bg {
  position: absolute;
  inset: 0;
  opacity: 0.22;
}

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

.page-about .about-history__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--deep-blue) 0%, rgba(18, 42, 92, 0.4) 60%, rgba(10, 27, 61, 0.72) 100%);
}

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

.page-about .about-history__head {
  margin-bottom: var(--space-lg);
}

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

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--success));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 var(--space-lg) 72px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 10px;
  top: 20px;
  display: block;
  width: 22px;
  height: 22px;
  border: 3px solid var(--accent);
  background: var(--midnight-navy);
  transform: rotate(45deg);
  box-shadow: 0 0 0 6px rgba(255, 107, 26, 0.15);
  transition: transform var(--transition-mid), background-color var(--transition-mid), box-shadow var(--transition-mid);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--accent);
  transform: rotate(180deg);
  box-shadow: 0 0 0 10px rgba(255, 107, 26, 0.12);
}

.page-about .about-timeline__card {
  background: var(--bg-card);
  border: 2px solid var(--line-grey);
  box-shadow: var(--about-shadow-card);
  padding: var(--space-md);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
}

.page-about .about-timeline__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-hover);
  border-color: var(--accent);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-numeric);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--success);
  background: rgba(57, 255, 136, 0.1);
  border: 1px solid rgba(57, 255, 136, 0.35);
  padding: 0.25rem 0.75rem;
  margin-bottom: var(--space-sm);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.2rem;
  font-weight: 700;
}

.page-about .about-timeline__card p {
  margin: 0;
  color: rgba(229, 233, 240, 0.82);
  line-height: 1.65;
}

@media (min-width: 900px) {
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 48px 48px 0;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 48px 48px;
    text-align: left;
  }

  .page-about .about-timeline__dot {
    left: auto;
    top: 20px;
    right: -11px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__dot {
    left: -11px;
    right: auto;
  }
}

/* ---------- 03 数据服务能力 ---------- */

.page-about .about-caps {
  padding: var(--space-xl) 0;
  background: var(--midnight-navy);
  position: relative;
}

.page-about .about-caps__head {
  max-width: 760px;
  margin-bottom: var(--space-lg);
}

.page-about .about-caps__layout {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

.page-about .about-caps__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
}

.page-about .about-cap {
  position: relative;
  background: var(--bg-card);
  border: 2px solid var(--line-grey);
  box-shadow: var(--about-shadow-card);
  padding: var(--space-md);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
}

.page-about .about-cap::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 28px 28px 0;
  border-color: transparent var(--accent) transparent transparent;
  opacity: 0.6;
  transition: opacity var(--transition-mid);
}

.page-about .about-cap:hover {
  transform: translateY(-6px);
  box-shadow: var(--about-shadow-hover);
  border-color: var(--accent);
}

.page-about .about-cap:hover::before {
  opacity: 1;
}

.page-about .about-cap__stat {
  display: block;
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.page-about .about-cap__unit {
  display: block;
  font-family: var(--font-numeric);
  font-size: 0.875rem;
  color: var(--steel-blue);
  margin-bottom: var(--space-sm);
}

.page-about .about-cap h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .about-cap p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.55;
  color: rgba(229, 233, 240, 0.75);
}

.page-about .about-caps__figure {
  margin: 0;
  position: relative;
  border: 2px solid var(--line-grey);
  box-shadow: var(--about-shadow-card);
  background: var(--bg-card);
}

.page-about .about-caps__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-caps__figure figcaption {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-numeric);
  font-size: 0.875rem;
  color: var(--steel-blue);
  border-top: 1px solid var(--line-grey);
  background: var(--charcoal);
}

@media (min-width: 900px) {
  .page-about .about-caps__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: var(--space-xl);
  }
}

/* ---------- 04 用户与口碑 ---------- */

.page-about .about-users {
  position: relative;
  padding: var(--space-xl) 0;
  background: var(--deep-blue);
  overflow: hidden;
}

.page-about .about-users::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 240px;
  height: 240px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 107, 26, 0.14) 50%);
  pointer-events: none;
}

.page-about .about-users__head {
  margin-bottom: var(--space-md);
}

.page-about .about-users__lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: rgba(229, 233, 240, 0.9);
  max-width: 48em;
  margin: 0 0 var(--space-lg);
}

.page-about .about-users__grid {
  display: grid;
  gap: var(--space-md);
}

.page-about .about-users__item {
  background: rgba(23, 27, 35, 0.72);
  border: 1px solid var(--steel-blue);
  padding: var(--space-md);
  position: relative;
  transition: border-color var(--transition-mid), transform var(--transition-mid), background-color var(--transition-mid);
}

.page-about .about-users__item:hover {
  border-color: var(--neon-green);
  background: rgba(23, 27, 35, 0.92);
  transform: translateY(-4px);
}

.page-about .about-users__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--neon-green);
  color: var(--neon-green);
  font-family: var(--font-numeric);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.page-about .about-users__item h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.1rem;
  font-weight: 700;
}

.page-about .about-users__item p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(229, 233, 240, 0.78);
}

@media (min-width: 800px) {
  .page-about .about-users__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-md);
  }
}

/* ---------- 05 运营服务 ---------- */

.page-about .about-ops {
  position: relative;
  padding: var(--space-xl) 0;
  background: var(--midnight-navy);
  overflow: hidden;
}

.page-about .about-ops__speedline {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background: repeating-linear-gradient(-45deg, transparent 0 16px, var(--neon-green) 16px 18px);
}

.page-about .about-ops__head {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin-bottom: var(--space-lg);
}

.page-about .about-ops__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-md);
}

.page-about .about-ops__card {
  background: var(--bg-card);
  border: 2px solid var(--line-grey);
  box-shadow: var(--about-shadow-card);
  padding: var(--space-md);
  position: relative;
  transition: border-color var(--transition-mid), box-shadow var(--transition-mid);
}

.page-about .about-ops__card:hover {
  border-color: var(--accent);
  box-shadow: var(--about-shadow-hover);
}

.page-about .about-ops__card--wide {
  grid-column: 1 / -1;
}

.page-about .about-ops__key {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xs);
}

.page-about .about-ops__value {
  margin: 0;
  font-family: var(--font-numeric);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--pure-white);
  word-break: break-word;
}

.page-about .about-ops__meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(74, 107, 154, 0.5);
}

.page-about .about-ops__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

@media (min-width: 680px) {
  .page-about .about-ops__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}