/* /knowledge/ only */
  .knowledge-hero {
    min-height: 420px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 104px 40px 54px;
    border-bottom: 1px solid var(--border2);
    background-image: url('/zakupki-banner.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
  }

  .knowledge-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(
      90deg,
      rgba(10, 12, 15, 0.72) 0%,
      rgba(10, 12, 15, 0.48) 50%,
      rgba(10, 12, 15, 0.30) 100%
    );
    pointer-events: none;
  }

  .knowledge-hero-inner {
    position: relative;
    z-index: 1;
    width: min(100%, 1200px);
    margin: 0 auto;
  }

  .knowledge-kicker {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
  }

  .knowledge-hero h1 {
    font-family: var(--head);
    font-size: clamp(30px, 4vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    max-width: 980px;
    margin: 0;
  }

  .knowledge-hero h1 strong {
    color: var(--accent);
  }

  .knowledge-intro {
    max-width: 820px;
    margin-top: 20px;
    color: #b7c0c9;
    font-size: 15px;
    line-height: 1.75;
  }

  .knowledge-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 40px;
  }

  .knowledge-lead {
    max-width: 820px;
    color: #aeb7c0;
    font-size: 14px;
    line-height: 1.75;
    margin-top: -10px;
  }

  .knowledge-directions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 28px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .knowledge-card {
    min-height: 330px;
    padding: 28px;
    background: var(--bg2);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text);
    transition: background 0.2s ease, border-color 0.2s ease;
  }

  a.knowledge-card:hover {
    background: var(--bg3);
  }

  .knowledge-card.is-active {
    box-shadow: inset 0 2px 0 rgba(0,212,255,0.70);
  }

  .knowledge-card-num {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin-bottom: 28px;
  }

  .knowledge-card h2 {
    font-family: var(--head);
    font-size: 22px;
    line-height: 1.25;
    margin-bottom: 14px;
  }

  .knowledge-card p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.7;
  }

  .knowledge-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 22px;
  }

  .knowledge-topic {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #c4cbd2;
    border: 1px solid var(--border2);
    padding: 5px 8px;
  }

  .knowledge-card-bottom {
    margin-top: auto;
    padding-top: 26px;
  }

  .knowledge-enter,
  .knowledge-status {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
  }

  .knowledge-enter {
    color: var(--accent);
  }

  .knowledge-status {
    color: #77818a;
  }

  .knowledge-principles-wrap {
    max-width: none;
    padding: 0;
    border-top: 1px solid var(--border2);
    border-bottom: 1px solid var(--border2);
    background: var(--bg2);
  }

  .knowledge-principles {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 40px;
  }

  .knowledge-principle-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 26px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .knowledge-principle {
    background: var(--bg);
    padding: 24px;
    color: var(--text);
    text-decoration: none;
    transition: background 0.2s ease;
  }

  a.knowledge-principle:hover {
    background: var(--bg3);
  }

  .knowledge-principle span {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  .knowledge-principle strong {
    display: block;
    font-family: var(--head);
    font-size: 15px;
    margin: 12px 0 8px;
  }

  .knowledge-principle p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.65;
  }

  .knowledge-server-map {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 26px;
  }

  .knowledge-map-group {
    border: 1px solid var(--border2);
    background: var(--bg2);
    padding: 24px;
  }

  .knowledge-map-group h3 {
    font-family: var(--head);
    font-size: 15px;
    margin-bottom: 14px;
  }

  .knowledge-map-list {
    list-style: none;
    display: grid;
    gap: 8px;
  }

  .knowledge-map-list li {
    position: relative;
    padding-left: 16px;
    color: #b5bdc5;
    font-size: 13px;
    line-height: 1.55;
  }

  .knowledge-map-list li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: var(--accent);
  }

  .knowledge-map-list a {
    color: #b5bdc5;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .knowledge-map-list a:hover {
    color: var(--accent);
  }

  .knowledge-cta {
    max-width: 1200px;
    margin: 0 auto;
    padding: 22px 40px 52px;
  }

  .knowledge-cta-box {
    border: 1px solid rgba(0,212,255,0.22);
    background: linear-gradient(135deg, rgba(0,212,255,0.055), rgba(15,19,24,0.96));
    padding: 28px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .knowledge-cta h2 {
    font-family: var(--head);
    font-size: 18px;
    line-height: 1.35;
    margin-bottom: 6px;
  }

  .knowledge-cta p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.6;
  }

  @media (max-width: 900px) {
    .knowledge-hero {
      background-attachment: scroll;
    }

    .knowledge-directions,
    .knowledge-principle-grid {
      grid-template-columns: 1fr;
    }

    .knowledge-card {
      min-height: auto;
    }
  }

  @media (max-width: 700px) {
    .knowledge-hero {
      min-height: 360px;
      padding: 88px 20px 42px;
      background-size: cover;
      background-position: center center;
      background-attachment: scroll;
    }

    .knowledge-hero h1 {
      font-size: clamp(28px, 9vw, 40px);
    }

    .knowledge-intro {
      font-size: 14px;
    }

    .knowledge-section,
    .knowledge-principles,
    .knowledge-cta {
      padding-left: 20px;
      padding-right: 20px;
    }

    .knowledge-server-map {
      grid-template-columns: 1fr;
    }

    .knowledge-cta-box {
      align-items: flex-start;
      flex-direction: column;
      padding: 24px;
    }
  }