/* ========== 页面作用域：about ========== */
.page-about {
  --about-hero-gap: clamp(2rem, 5vw, 3.5rem);
  --about-gold-glow: rgba(245, 184, 65, 0.22);
  --about-blue-glow: rgba(0, 229, 255, 0.16);
  --about-purple-glow: rgba(155, 92, 255, 0.18);
  position: relative;
  background: var(--color-bg);
  color: var(--color-text);
}

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

.page-about ::selection {
  background: rgba(245, 184, 65, 0.35);
  color: #ffffff;
}

/* ---------- 01 品牌叙事 · 英雄分屏 ---------- */
.page-about .about-hero {
  padding: clamp(2.5rem, 5vw, 5rem) 0 0;
  position: relative;
}

.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-hero-gap);
  align-items: start;
}

.page-about .about-hero-aside {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero-visual {
  position: relative;
  min-height: 220px;
}

.page-about .about-hero-visual img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.page-about .about-hero-svg {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.9;
}

.page-about .about-hero-aside-body {
  padding: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-aside-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.page-about .about-aside-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  color: var(--color-text-dim);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: background-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.page-about .about-aside-nav a:hover,
.page-about .about-aside-nav a:focus-visible {
  background: rgba(245, 184, 65, 0.08);
  color: var(--color-gold);
  border-left-color: var(--color-gold);
}

.page-about .about-keyword-list {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-keyword-list li {
  font-size: 0.75rem;
  font-family: var(--font-display);
  color: var(--color-text);
  background: linear-gradient(105deg, rgba(9, 11, 16, 0.9), rgba(28, 33, 48, 0.9));
  border: 1px solid rgba(245, 184, 65, 0.3);
  border-left: 2px solid var(--color-gold);
  border-radius: 999px;
  padding: 0.375rem 0.75rem;
}

.page-about .about-hero-main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
  font-family: var(--font-accent);
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--color-gold);
}

.page-about .about-kicker-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.875rem;
  height: 1.875rem;
  padding: 0 0.375rem;
  border: 1px solid rgba(245, 184, 65, 0.45);
  border-radius: 4px;
  font-family: var(--font-accent);
  font-size: 0.875rem;
  color: var(--color-gold);
  line-height: 1;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-text);
  max-width: 16em;
}

.page-about .about-lead {
  margin: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--color-gold);
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.7;
  color: var(--color-text);
  max-width: 42em;
}

.page-about .about-narrative {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  max-width: 62em;
}

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

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* ---------- 通用章节头 ---------- */
.page-about .about-section-head {
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.page-about .about-section-head h2 {
  margin: 0.75rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 3vw, 2.75rem);
  line-height: 1.15;
  color: var(--color-text);
}

.page-about .about-section-desc {
  margin: 0;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-dim);
}

/* ---------- 02 发展里程碑 ---------- */
.page-about .about-milestones {
  padding: var(--space-section) 0 0;
  position: relative;
}

.page-about .about-timeline-wrap {
  position: relative;
}

.page-about .about-timeline-image {
  max-width: 320px;
  margin: 0 0 2rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  opacity: 0.5;
}

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

.page-about .about-timeline-item {
  position: relative;
  margin: 0 0 0 0.5rem;
  padding: 0 0 2.5rem 1.25rem;
  border-left: 1px solid rgba(245, 184, 65, 0.22);
}

.page-about .about-timeline-item:last-child {
  padding-bottom: 0.25rem;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  top: 0.375rem;
  left: -0.4375rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 14px rgba(245, 184, 65, 0.8);
}

.page-about .about-timeline-year {
  margin-bottom: 0.5rem;
  font-family: var(--font-accent);
  font-size: clamp(2.125rem, 4vw, 3.25rem);
  line-height: 1;
  color: var(--color-gold);
  letter-spacing: 0.02em;
}

.page-about .about-timeline-card {
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out);
}

.page-about .about-timeline-card:hover {
  border-color: rgba(245, 184, 65, 0.3);
  box-shadow: var(--shadow-float);
}

.page-about .about-timeline-card h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-text);
}

.page-about .about-timeline-card p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-dim);
}

/* ---------- 03 价值观与能力 ---------- */
.page-about .about-values {
  padding: var(--space-section) 0;
  position: relative;
  background:
    radial-gradient(ellipse at 15% 0%, var(--about-purple-glow), transparent 55%),
    radial-gradient(ellipse at 100% 75%, var(--about-blue-glow), transparent 45%);
}

.page-about .about-values-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}

.page-about .about-value-block {
  position: relative;
  overflow: hidden;
  padding: 2rem 1.5rem 1.75rem;
  background: linear-gradient(135deg, rgba(28, 33, 48, 0.92), rgba(22, 26, 35, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out);
}

.page-about .about-value-block::after {
  content: "";
  pointer-events: none;
  position: absolute;
  right: -20%;
  bottom: -30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, var(--color-gold) 0%, transparent 70%);
  opacity: 0.12;
}

.page-about .about-value-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
}

.page-about .about-value-block:hover,
.page-about .about-value-block:focus-within {
  transform: translateY(-4px);
  border-color: rgba(245, 184, 65, 0.35);
  box-shadow: var(--shadow-float);
}

.page-about .about-value-rhythm::before {
  background: linear-gradient(90deg, var(--color-blue), var(--color-purple));
}

.page-about .about-value-path::before {
  background: linear-gradient(90deg, var(--color-purple), var(--color-gold));
}

.page-about .about-value-tech::before {
  background: linear-gradient(90deg, var(--color-blue), var(--color-gold));
}

.page-about .about-value-rhythm::after {
  background: radial-gradient(circle, var(--color-blue) 0%, transparent 70%);
  opacity: 0.12;
}

.page-about .about-value-path::after {
  background: radial-gradient(circle, var(--color-purple) 0%, transparent 70%);
  opacity: 0.15;
}

.page-about .about-value-tech::after {
  background: radial-gradient(circle, var(--color-blue) 0%, transparent 70%);
  opacity: 0.1;
}

.page-about .about-value-index {
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--color-gold);
}

.page-about .about-value-block h3 {
  margin: 0.75rem 0 0.625rem;
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--color-text);
}

.page-about .about-value-block p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-dim);
}

.page-about .about-value-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: 1.125rem;
  padding-bottom: 0.125rem;
  font-size: 0.8125rem;
  color: var(--color-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.page-about .about-value-link:hover,
.page-about .about-value-link:focus-visible {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.page-about .about-value-link span {
  font-size: 0.9375rem;
  line-height: 1;
}

.page-about .about-values-visual {
  margin-top: 3rem;
  overflow: hidden;
  border: 1px solid rgba(245, 184, 65, 0.18);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

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

.page-about .about-values-visual figcaption {
  padding: 1rem 1.25rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ---------- 04 联系与备案 ---------- */
.page-about .about-contact {
  padding: var(--space-section) 0 4rem;
  position: relative;
  background:
    radial-gradient(ellipse at 85% 15%, var(--about-purple-glow), transparent 55%),
    radial-gradient(ellipse at 5% 90%, var(--about-blue-glow), transparent 45%);
}

.page-about .about-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.page-about .about-contact-main {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
}

.page-about .about-contact-main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-purple), var(--color-blue));
}

.page-about .about-contact-intro {
  margin: 0 0 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text);
}

.page-about .about-contact-list {
  margin: 0;
  padding: 0;
}

.page-about .about-contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-contact-row dt {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.page-about .about-contact-row dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

.page-about .about-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-contact-aside {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-about .about-contact-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1.25rem;
  background: rgba(22, 26, 35, 0.75);
  border: 1px solid rgba(61, 220, 151, 0.18);
  border-radius: var(--radius-md);
}

.page-about .about-contact-note strong {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  color: var(--color-text);
}

.page-about .about-contact-note p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-dim);
}

/* ---------- 响应式：平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-contact-row {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 2rem;
  }

  .page-about .about-contact-row dd {
    text-align: right;
  }

  .page-about .about-values-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-value-rhythm,
  .page-about .about-value-tech {
    margin-top: 2.25rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
    gap: var(--about-hero-gap);
  }

  .page-about .about-hero-aside {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }

  .page-about .about-hero {
    padding-top: calc(var(--header-h) * 0.5);
  }

  .page-about .about-timeline-image {
    position: absolute;
    top: 5%;
    right: 0;
    width: 46%;
    max-width: 460px;
    margin: 0;
    opacity: 0.22;
    z-index: 0;
    pointer-events: none;
  }

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

  .page-about .about-timeline-card {
    background: rgba(22, 26, 35, 0.82);
    backdrop-filter: blur(6px);
  }

  .page-about .about-contact-grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    gap: 3rem;
  }

  .page-about .about-contact-aside {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}