.about-page {
  background: radial-gradient(ellipse at 80% 15%, #102c31 0, transparent 50%), #091317;
}
.about-container {
  width: min(calc(100% - 64px), 1096px);
  margin: auto;
}
.about-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
}
.about-signin {
  display: inline-flex;
  gap: 18px;
  align-items: center;
  padding: 9px 15px;
  color: var(--accent);
  border: 1px solid #39605f;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.about-signin:hover {
  background: #163237;
  border-color: var(--accent);
}
.about-hero {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  align-items: center;
  padding: clamp(38px, 7vw, 96px) 0;
}
.about-intro h1 {
  max-width: 16ch;
  font-size: clamp(2.65rem, 5.4vw, 4.8rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -.055em;
  text-wrap: balance;
}
.about-intro p, .about-features p {
  color: var(--dim);
  line-height: 1.65;
}
.about-intro p {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  margin-top: 24px;
  max-width: 56ch;
}
.about-art {
  width: 100%;
  aspect-ratio: 1.35;
  background: radial-gradient(ellipse at center, #16474c80, transparent 69%);
}
.about-uses {
  padding: 34px 0 68px;
  border-top: 1px solid var(--line);
}
.about-uses h2 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 500;
  letter-spacing: -.04em;
}
.about-features {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 16px;
}
.about-features section {
  border: 1px solid var(--line);
  background: #102026;
  padding: 23px 25px;
  border-radius: 13px;
}
.about-features h3 {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 9px;
}
@media (max-width: 700px) {
  .about-container { width: calc(100% - 40px); }
  .about-header { min-height: 68px; }
  .about-hero { display: flex; flex-direction: column; padding: 38px 0 14px; }
  .about-art { max-width: 320px; height: 155px; }
  .about-features { grid-template-columns: 1fr; gap: 12px; }
  .about-features section { padding: 20px; }
}