/* ========== 品牌故事页 · 页面专属样式 ========== */
.page-about {
  --about-grid: rgba(255, 255, 255, 0.045);
  --about-grid-strong: rgba(255, 255, 255, 0.1);
  --about-green: var(--c-accent);
  --about-orange: var(--c-orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px),
    var(--grad-bg);
  background-size: 44px 44px, 44px 44px, cover;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: radial-gradient(ellipse at 78% 20%, rgba(57, 255, 20, 0.12), transparent 55%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  z-index: -1;
  width: 42%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 106, 0, 0.1), transparent 45%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 48px;
  padding-top: 40px;
  padding-bottom: 72px;
}

.page-about .about-hero__content {
  position: relative;
  max-width: 620px;
}

.page-about .about-hero__side-note {
  display: none;
}

.page-about .about-hero__kicker {
  margin-top: 18px;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.page-about .about-hero__subtitle {
  margin: 18px 0 0;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-accent);
}

.page-about .about-hero__desc {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

.page-about .about-hero__actions {
  margin-top: 30px;
}

.page-about .about-hero__visual {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.07), rgba(255, 106, 0, 0.05));
  border: 1px solid var(--c-border);
  clip-path: polygon(0 0, 78% 0, 100% 22%, 100% 100%, 22% 100%, 0 78%);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), transparent 72%);
}

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

.page-about .about-hero__badge {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 128px;
  padding: 12px 16px;
  background: var(--c-bg-deep);
  border: 1px solid var(--c-border);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

.page-about .about-hero__badge--green {
  left: -14px;
  bottom: 42px;
  border-top: 2px solid var(--c-accent);
}

.page-about .about-hero__badge--orange {
  right: -10px;
  top: 56px;
  border-top: 2px solid var(--c-orange);
  text-align: right;
}

.page-about .about-hero__badge-label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

.page-about .about-hero__badge-value {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}

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

/* ---------- 01 我们是谁 ---------- */
.page-about .about-identity__body {
  display: grid;
  gap: 36px;
  margin-top: 48px;
}

.page-about .about-identity__text p {
  margin: 0 0 18px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

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

.page-about .about-identity__panel {
  position: relative;
  padding: 28px 24px;
  background: linear-gradient(145deg, rgba(30, 58, 95, 0.3), rgba(5, 13, 26, 0.5));
  border: 1px solid var(--c-border);
  border-left: 2px solid var(--c-accent);
}

.page-about .about-identity__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-border);
}

.page-about .about-identity__stat:first-child {
  padding-top: 0;
}

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

.page-about .about-identity__stat-num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 2.25rem;
  line-height: 1;
  color: var(--c-text);
}

.page-about .about-identity__stat-label {
  font-size: 0.875rem;
  color: var(--c-text-dim);
}

/* ---------- 02 发展历程 ---------- */
.page-about .about-journey {
  position: relative;
  background: var(--c-bg-deep);
}

.page-about .about-journey::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 56px 56px, 56px 56px;
  pointer-events: none;
}

.page-about .about-journey > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-journey__overview {
  display: grid;
  gap: 28px;
  margin-top: 48px;
  padding: 28px;
  background: rgba(5, 13, 26, 0.65);
  border: 1px solid var(--c-border);
  border-top: 2px solid var(--c-orange);
}

.page-about .about-journey__figure {
  margin: 0;
  overflow: hidden;
}

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

.page-about .about-journey__note-label {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.3rem;
  color: var(--c-accent);
}

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

.page-about .about-journey__facts li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  font-size: 0.9375rem;
  color: var(--c-text-dim);
  border-bottom: 1px dashed var(--c-border);
}

.page-about .about-journey__facts li:last-child {
  border-bottom: 0;
}

.page-about .about-journey__facts li span {
  font-weight: 800;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}

/* 时间线 */
.page-about .about-journey__timeline {
  list-style: none;
  margin: 56px 0 0;
  padding: 0;
}

.page-about .journey-item {
  position: relative;
  padding: 36px 0 36px 28px;
  border-top: 1px solid var(--c-border);
}

.page-about .journey-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 48px;
  width: 10px;
  height: 10px;
  background: var(--c-text-dim);
  transform: rotate(45deg);
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-about .journey-item.is-current::before {
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.12);
}

.page-about .journey-item__version {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 2.5rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.3);
}

.page-about .journey-item.is-current .journey-item__version {
  color: var(--c-accent);
  -webkit-text-stroke: 0;
  text-shadow: 0 0 24px rgba(57, 255, 20, 0.28);
}

.page-about .journey-item__content {
  margin-top: 12px;
}

.page-about .journey-item__content h3 {
  margin: 0 0 8px;
  font-size: 1.125rem;
  line-height: 1.55;
  font-weight: 800;
  color: var(--c-text);
}

.page-about .journey-item__content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

/* ---------- 03 技术亮点 ---------- */
.page-about .about-tech__grid {
  display: grid;
  gap: 24px;
  margin-top: 48px;
}

.page-about .tech-card {
  position: relative;
  padding: 28px 28px 24px;
  background: linear-gradient(145deg, rgba(30, 58, 95, 0.35), rgba(5, 13, 26, 0.6));
  border: 1px solid var(--c-border);
  outline: none;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .tech-card:hover,
.page-about .tech-card:focus-within {
  border-color: rgba(57, 255, 20, 0.55);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 0 0 1px rgba(57, 255, 20, 0.12);
  transform: translateY(-4px);
}

.page-about .tech-card__index {
  position: absolute;
  top: 0;
  right: 0;
  padding: 10px 14px;
  border-left: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.125rem;
  color: var(--c-orange);
}

.page-about .tech-card__title {
  margin: 0 0 12px;
  padding-right: 48px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--c-text);
}

.page-about .tech-card__summary {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .tech-card__detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.35s ease, margin-top 0.3s ease, padding-top 0.3s ease;
}

.page-about .tech-card:hover .tech-card__detail,
.page-about .tech-card:focus-within .tech-card__detail {
  max-height: 200px;
  opacity: 1;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}

.page-about .tech-card__detail p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--c-text-dim);
}

/* ---------- 04 团队与理念 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 48px;
  margin-top: 48px;
}

.page-about .about-team__figure {
  position: relative;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
}

.page-about .about-team__figure::after {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(255, 106, 0, 0.45);
  pointer-events: none;
}

.page-about .about-team__img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  background: var(--c-bg-lift);
  border: 1px solid var(--c-border);
}

.page-about .about-team__content p {
  margin: 0 0 18px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

.page-about .about-team__roles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-team__roles li {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}

.page-about .about-team__roles li:last-child {
  border-bottom: 0;
}

.page-about .about-team__role {
  font-weight: 800;
  font-size: 0.9375rem;
  color: var(--c-accent);
}

.page-about .about-team__desc {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--c-text-dim);
}

/* ---------- 底部行动 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--c-bg);
}

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

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -40px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(57, 255, 20, 0.12);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  padding-top: 88px;
  padding-bottom: 96px;
  text-align: center;
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  color: var(--c-text);
}

.page-about .about-cta__text {
  margin: 20px auto 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 992px) {
  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
    padding-top: 80px;
    padding-bottom: 120px;
  }

  .page-about .about-hero__side-note {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    writing-mode: vertical-rl;
    padding: 8px 0;
    font-size: 0.75rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--c-text-dim);
    opacity: 0.7;
  }

  .page-about .about-hero__title {
    padding-right: 56px;
  }

  .page-about .about-hero__visual {
    margin: 0;
    justify-self: end;
  }

  .page-about .about-hero__lines {
    display: block;
    position: absolute;
    top: 0;
    right: -60px;
    width: 55%;
    height: 100%;
    pointer-events: none;
    opacity: 0.55;
    z-index: 0;
  }

  .page-about .about-hero__lines span {
    position: absolute;
    bottom: 0;
    width: 1px;
    height: 58%;
    background: linear-gradient(to top, transparent, rgba(57, 255, 20, 0.32) 85%);
  }

  .page-about .about-hero__lines span:nth-child(1) {
    right: 28%;
    height: 45%;
  }

  .page-about .about-hero__lines span:nth-child(2) {
    right: 14%;
    height: 62%;
  }

  .page-about .about-hero__lines span:nth-child(3) {
    right: 2%;
    height: 38%;
  }

  .page-about .about-identity__body {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 88px;
    align-items: center;
  }

  .page-about .about-journey__overview {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-journey__timeline {
    margin-top: 72px;
  }

  .page-about .journey-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 56px;
    padding: 56px 0;
  }

  .page-about .journey-item::before {
    display: none;
  }

  .page-about .journey-item__version {
    font-size: 4.1rem;
  }

  .page-about .journey-item__content {
    margin-top: 0;
    padding-left: 24px;
    border-left: 1px solid var(--c-border);
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .tech-card:nth-child(2),
  .page-about .tech-card:nth-child(4) {
    margin-top: 48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 88px;
    align-items: start;
  }
}