/* ========== 品牌故事 · 页面专属 ========== */
.page-about {
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(ellipse at 85% 0%, rgba(255, 107, 53, 0.08) 0%, transparent 55%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(45deg, transparent 0 18px, rgba(0, 208, 132, 0.025) 18px 19px),
    repeating-linear-gradient(-45deg, transparent 0 36px, rgba(255, 107, 53, 0.02) 36px 37px);
}

.page-about .about-layout {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
}

/* ---------- 品牌轨道 ---------- */
.page-about .about-rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-rail__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-heading);
  font-family: var(--font-display);
}

.page-about .about-rail__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 22px;
  font-weight: 700;
  transform: skewX(-8deg);
  box-shadow: var(--shadow-accent);
}

.page-about .about-rail__name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-about .about-rail__batch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-success);
  white-space: nowrap;
}

.page-about .about-rail__nav {
  display: none;
}

/* ---------- 内容区 ---------- */
.page-about .about-content {
  min-width: 0;
}

/* ---------- 封面 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 48px 20px 52px;
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 70%);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 32px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-success);
}

.page-about .about-hero h1 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 700;
  line-height: 1.05;
  color: var(--color-heading);
  letter-spacing: 0.01em;
}

.page-about .about-hero__subtitle {
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-accent);
}

.page-about .about-hero__subtitle::before {
  content: "";
  width: 36px;
  height: 3px;
  background: var(--color-accent);
  flex: 0 0 auto;
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  max-width: 620px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
}

.page-about .about-hero__cta {
  display: inline-flex;
}

.page-about .about-hero__metric {
  position: relative;
  margin-top: 28px;
  padding: 24px 26px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.16) 0%, rgba(255, 107, 53, 0.03) 100%);
  border-left: 4px solid var(--color-accent);
}

.page-about .about-hero__metric::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 72px;
  height: 72px;
  background: rgba(255, 107, 53, 0.18);
  transform: rotate(45deg);
}

.page-about .about-hero__metric-num {
  display: block;
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 700;
  line-height: 0.95;
  color: var(--color-accent);
}

.page-about .about-hero__metric-caption {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-heading);
  letter-spacing: 0.06em;
}

.page-about .about-hero__metric-note {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  position: relative;
  padding: 56px 20px;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: 80px;
}

.page-about .about-section .section-title {
  margin: 0 0 24px;
}

/* ---------- 启程 ---------- */
.page-about .about-origin__text p {
  margin: 0 0 16px;
  line-height: 1.75;
}

.page-about .about-origin__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-origin__stats li {
  flex: 1 1 120px;
  padding: 16px 14px;
  background: var(--color-surface);
  border-left: 3px solid var(--color-accent);
}

.page-about .about-origin__stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.1;
  color: var(--color-heading);
}

.page-about .about-origin__stats span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-text-muted);
}

.page-about .about-origin__figure {
  margin: 28px 0 0;
  padding: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
}

.page-about .about-origin__figure::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 64px;
  height: 64px;
  border-top: 3px solid var(--color-accent);
  border-right: 3px solid var(--color-accent);
}

.page-about .about-origin__img,
.page-about .about-milestones__img,
.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-bg-deep);
}

/* ---------- 信念 ---------- */
.page-about .about-belief__lead {
  margin: 0 0 8px;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-heading);
}

.page-about .about-belief__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 28px;
}

.page-about .about-belief__item {
  position: relative;
  overflow: hidden;
  padding: 28px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.page-about .about-belief__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 55%, transparent);
}

.page-about .about-belief__item--2::before {
  background: linear-gradient(90deg, var(--color-success) 55%, transparent);
}

.page-about .about-belief__item--3::before {
  background: linear-gradient(90deg, #FFD700 55%, transparent);
}

.page-about .about-belief__num {
  display: block;
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.1);
  margin-bottom: 14px;
}

.page-about .about-belief__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-heading);
}

.page-about .about-belief__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  scroll-margin-top: 80px;
}

.page-about .about-milestones__timeline {
  position: relative;
  margin: 36px 0 0;
}

.page-about .about-milestones__timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--color-border) 8%, var(--color-border) 92%, transparent);
}

.page-about .about-milestones__item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 28px;
}

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

.page-about .about-milestones__year {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-heading);
}

.page-about .about-milestones__dot {
  position: absolute;
  left: 2px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.14);
}

.page-about .about-milestones__card {
  margin-top: 12px;
  padding: 18px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0 12px 12px 12px;
}

.page-about .about-milestones__card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-heading);
}

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

.page-about .about-milestones__figure {
  margin: 32px 0 0;
  padding: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
}

.page-about .about-milestones__figure::before {
  content: "";
  position: absolute;
  bottom: -1px;
  left: -1px;
  width: 64px;
  height: 64px;
  border-bottom: 3px solid var(--color-success);
  border-left: 3px solid var(--color-success);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  scroll-margin-top: 80px;
}

.page-about .about-team__lead {
  margin: 0 0 28px;
  max-width: 640px;
  line-height: 1.75;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-team__card {
  position: relative;
  padding: 30px 24px 26px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 30px 16px 26px 12px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-team__card--tech {
  border-radius: 16px 30px 12px 26px;
}

.page-about .about-team__card--service {
  border-radius: 22px 18px 34px 14px;
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.25);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  transform: skewX(-28deg);
}

.page-about .about-team__card--tech::before {
  background: var(--color-success);
}

.page-about .about-team__card--service::before {
  background: #FFD700;
}

.page-about .about-team__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 64px;
  padding: 0 10px;
  margin-bottom: 20px;
  background: rgba(255, 107, 53, 0.15);
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-heading);
  transform: skewX(-8deg);
}

.page-about .about-team__card--tech .about-team__icon {
  background: rgba(0, 208, 132, 0.15);
}

.page-about .about-team__card--service .about-team__icon {
  background: rgba(255, 215, 0, 0.15);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-heading);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

.page-about .about-team__figure {
  margin: 32px 0 0;
  padding: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

/* ---------- 信任底座 ---------- */
.page-about .about-trust {
  position: relative;
  margin: 56px 20px 0;
  padding: 40px 28px;
  background: linear-gradient(135deg, #F0F4FA 0%, #E6EDF7 100%);
  overflow: hidden;
}

.page-about .about-trust::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 160px;
  height: 160px;
  background: rgba(255, 107, 53, 0.08);
  transform: rotate(45deg);
  border-radius: 20px;
}

.page-about .about-trust h2 {
  position: relative;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: #0A1F44;
}

.page-about .about-trust p {
  position: relative;
  margin: 0 0 24px;
  max-width: 640px;
  font-size: 15px;
  line-height: 1.7;
  color: #33415C;
}

.page-about .about-trust .data-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 10px 10px 0;
  padding: 8px 14px;
  font-size: 13px;
  background: rgba(10, 31, 68, 0.08);
  border: 1px solid rgba(10, 31, 68, 0.12);
  color: #0A1F44;
  border-radius: var(--radius-pill);
}

.page-about .about-trust .dot-live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
}

.page-about .about-trust .btn {
  margin-top: 8px;
  margin-right: 12px;
}

.page-about .about-trust .btn-ghost {
  border-color: #0A1F44;
  color: #0A1F44;
}

/* ---------- 动效 ---------- */
@keyframes about-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.page-about .about-rail__batch .dot-live {
  animation: about-pulse 1.8s ease-in-out infinite;
}

/* ===== 平板 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 32px 60px;
  }

  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 40px;
    align-items: start;
  }

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

  .page-about .about-section {
    padding: 64px 32px;
  }

  .page-about .about-origin {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    align-items: start;
  }

  .page-about .about-origin__text {
    grid-column: 1;
  }

  .page-about .about-origin__figure {
    grid-column: 2;
    margin-top: 0;
  }

  .page-about .about-belief__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-trust {
    margin: 64px 32px 0;
    padding: 48px 40px;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 992px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    max-width: 1440px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 0;
    align-self: start;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    height: 100vh;
    padding: 48px 28px;
    background: var(--color-bg-deep);
    border-bottom: 0;
    border-right: 1px solid var(--color-border);
  }

  .page-about .about-rail__nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 56px;
  }

  .page-about .about-rail__link {
    position: relative;
    color: var(--color-text);
    text-decoration: none;
    font-size: 15px;
    padding-left: 16px;
    transition: color var(--transition-base);
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    transform: translateY(-50%) rotate(45deg);
    transition: transform var(--transition-base);
  }

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

  .page-about .about-rail__link:hover::before {
    transform: translateY(-50%) rotate(0);
  }

  .page-about .about-rail__batch {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    width: 100%;
  }

  .page-about .about-hero {
    padding: 80px 48px 72px;
  }

  .page-about .about-hero h1 {
    font-size: 56px;
  }

  .page-about .about-hero__subtitle {
    font-size: 26px;
  }

  .page-about .about-hero__lead {
    font-size: 16px;
    max-width: 560px;
  }

  .page-about .about-hero__metric-num {
    font-size: 88px;
  }

  .page-about .about-section {
    padding: 80px 48px;
  }

  .page-about .about-milestones {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-milestones .section-title {
    grid-column: 1 / -1;
  }

  .page-about .about-milestones__timeline {
    margin-top: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .page-about .about-milestones__timeline::before {
    display: none;
  }

  .page-about .about-milestones__item {
    padding: 0;
    margin: 0;
  }

  .page-about .about-milestones__item:nth-child(even) {
    margin-top: 48px;
  }

  .page-about .about-milestones__dot {
    position: static;
    display: block;
    width: 12px;
    height: 12px;
    margin: 12px 0 10px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.14);
  }

  .page-about .about-milestones__card {
    border-radius: 0 12px 12px 0;
    border-left: 3px solid var(--color-accent);
  }

  .page-about .about-milestones__item:nth-child(2) .about-milestones__dot {
    background: var(--color-success);
  }

  .page-about .about-milestones__item:nth-child(3) .about-milestones__dot {
    background: #FFD700;
  }

  .page-about .about-milestones__item:nth-child(2) .about-milestones__card {
    border-left-color: var(--color-success);
  }

  .page-about .about-milestones__item:nth-child(3) .about-milestones__card {
    border-left-color: #FFD700;
  }

  .page-about .about-milestones__item:nth-child(4) .about-milestones__card {
    border-left-color: var(--color-accent);
  }

  .page-about .about-milestones__figure {
    grid-column: 2;
    grid-row: 2 / 4;
    margin-top: 0;
    align-self: center;
  }

  .page-about .about-team__figure {
    margin-top: 40px;
  }

  .page-about .about-trust {
    margin: 80px 48px 0;
    padding: 56px 48px;
  }

  .page-about .about-trust h2 {
    font-size: 34px;
  }
}