/* ==========================================================================
   VPNAN - 关于页专属样式
   ========================================================================== */

/* ---- Hero ---- */
.about-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.about-hero .kicker {
  margin-bottom: 18px;
}

.about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 4.5vw, 56px);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 18px;
  text-wrap: balance;
}

.about-hero h1 .kw {
  color: var(--accent);
}

.about-lead {
  font-size: 16.5px;
  color: var(--text-muted);
  max-width: 36em;
  line-height: 1.75;
  margin-bottom: 0;
}

.about-lead strong {
  color: var(--text);
  font-weight: 700;
}

/* ---- 三栏台账网格 ---- */
.about-body {
  padding: 56px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.about-section {
  padding: 28px 26px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: box-shadow .15s, transform .15s;
}

.about-section:hover {
  box-shadow: inset 0 2px 0 var(--accent);
  transform: translateY(-2px);
}

.about-section h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  letter-spacing: -.01em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.about-section h2 svg {
  color: var(--accent);
  flex: 0 0 auto;
  margin-top: 2px;
}

.about-section p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 12px;
}

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

.about-section ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.about-section li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.about-section li:last-child {
  border-bottom: none;
}

.about-section li svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--accent);
}

/* ---- 事实带 ---- */
.about-facts {
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 48px 0;
}

.facts-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.fact-item {
  text-align: center;
  padding: 16px 8px;
}

.fact-num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1.2;
}

.fact-num .unit {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-muted);
}

.fact-num.fact-text {
  font-size: 28px;
  line-height: 1.4;
  padding-top: 4px;
}

.fact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 8px;
}

/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .facts-band {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .about-hero {
    padding: 40px 0 32px;
  }
  .about-hero h1 {
    font-size: 32px;
  }
  .about-lead {
    font-size: 15px;
  }
  .about-body {
    padding: 40px 0;
  }
  .about-section {
    padding: 22px 18px;
  }
  .about-facts {
    padding: 36px 0;
  }
  .fact-num {
    font-size: 28px;
  }
  .fact-num.fact-text {
    font-size: 24px;
  }
}