.system-intro-button {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 3px 18px;
  width: min(100%, 570px);
  margin-top: 22px;
  padding: 15px 17px;
  border: 1px solid rgba(228, 189, 112, .34);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(228, 189, 112, .1), rgba(17, 21, 29, .82));
  color: var(--text);
  text-align: left;
  transition: border-color .18s, background .18s, transform .18s;
}

.system-intro-button:hover {
  border-color: rgba(228, 189, 112, .7);
  background: linear-gradient(135deg, rgba(228, 189, 112, .16), rgba(17, 21, 29, .92));
  transform: translateY(-1px);
}

.system-intro-button span {
  color: var(--gold);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .16em;
}

.system-intro-button strong {
  font-size: 15px;
}

.system-intro-button i {
  grid-column: 2;
  grid-row: 1 / 3;
  color: var(--gold-2);
  font-size: 24px;
  font-style: normal;
}

.auth-about-link {
  display: none;
  width: 100%;
  margin: 0 0 20px;
  padding: 11px 13px;
  border: 1px solid rgba(228, 189, 112, .35);
  border-radius: 10px;
  background: rgba(228, 189, 112, .08);
  color: var(--gold-2);
  font-size: 12px;
  font-weight: 800;
  text-align: left;
}

.system-intro-dialog {
  width: min(820px, calc(100vw - 30px));
  padding: 34px;
}

.system-intro-dialog > h2 {
  margin: 0 48px 10px 0;
  font-size: 32px;
}

.system-intro-lead {
  max-width: 700px;
  margin-bottom: 22px;
  color: #bac2cf;
  font-size: 15px;
  line-height: 1.75;
}

.hgy-intro-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
}

.hgy-intro-point {
  padding: 17px;
  background: #0d1117;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.hgy-intro-point > span {
  display: block;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .15em;
}

.hgy-intro-point > strong {
  display: block;
  margin-bottom: 7px;
  color: #eef0f4;
}

.hgy-intro-point p {
  margin: 0;
  color: #9ea7b6;
  font-size: 12px;
  line-height: 1.65;
}

.hgy-intro-principle {
  margin: 18px 0;
  padding: 17px 20px;
  border: 1px solid rgba(228, 189, 112, .3);
  border-left: 4px solid var(--gold);
  border-radius: 12px;
  background: rgba(228, 189, 112, .08);
  color: var(--gold-2);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.7;
}

.hgy-intro-core {
  padding: 20px;
  background: linear-gradient(145deg, #131921, #0e1319);
  border: 1px solid #293341;
  border-radius: 14px;
}

.hgy-intro-core h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.hgy-intro-core > p:last-of-type {
  margin: 0;
  color: #bac2cf;
  font-size: 13px;
  line-height: 1.75;
}

.hgy-intro-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
  margin-top: 17px;
}

.hgy-intro-features div {
  padding: 12px;
  border: 1px solid #29313d;
  border-radius: 10px;
  background: #0b0f14;
}

.hgy-intro-features strong,
.hgy-intro-features span {
  display: block;
}

.hgy-intro-features strong {
  margin-bottom: 5px;
  color: var(--gold-2);
  font-size: 13px;
}

.hgy-intro-features span {
  color: #929cab;
  font-size: 11px;
  line-height: 1.5;
}

.hgy-intro-note {
  margin: 16px 0 20px;
  padding: 14px 16px;
  border: 1px solid #3d4037;
  border-radius: 11px;
  background: #12130f;
}

.hgy-intro-note strong {
  display: block;
  margin-bottom: 5px;
  color: var(--gold-2);
  font-size: 13px;
}

.hgy-intro-note p {
  margin: 0;
  color: #aab1bc;
  font-size: 12px;
  line-height: 1.7;
}

@media (max-width: 1000px) {
  .auth-about-link {
    display: block;
  }
}

@media (max-width: 700px) {
  .system-intro-dialog {
    padding: 26px 17px;
  }

  .system-intro-dialog > h2 {
    font-size: 25px;
  }

  .hgy-intro-points,
  .hgy-intro-features {
    grid-template-columns: 1fr;
  }

  .hgy-intro-principle {
    font-size: 14px;
  }

  .hgy-intro-point {
    padding: 14px;
  }
}