.deepdoc-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--line-thin) solid var(--color-border);
  background:
    linear-gradient(90deg, var(--color-grid-strong) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(0deg, var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(118deg, var(--color-bg), var(--color-panel) 74%, var(--color-bg));
  background-size: 54px 54px, 54px 54px, auto;
}

.deepdoc-hero::after {
  position: absolute;
  right: -8%;
  bottom: 0;
  width: 62%;
  height: 5px;
  content: "";
  transform: skewX(-38deg);
  background: var(--color-accent);
  box-shadow: var(--shadow-accent);
}

.deepdoc-hero-grid {
  min-height: 670px;
  padding-top: clamp(70px, 9vw, 125px);
  padding-bottom: clamp(70px, 9vw, 125px);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(430px, 1.1fr);
  align-items: center;
  gap: clamp(34px, 6vw, 90px);
}

.deepdoc-hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.deepdoc-hero-copy h1 {
  max-width: 760px;
  margin-bottom: 28px;
}

.deepdoc-lead {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.deepdoc-hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.config-board {
  position: relative;
  min-width: 0;
  height: 470px;
  border: var(--line-medium) solid var(--color-border);
  clip-path: polygon(28px 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%, 0 28px);
  background:
    repeating-linear-gradient(90deg, var(--color-metal-dark) 0 5px, var(--color-panel) 5px 9px);
  box-shadow: var(--shadow-device), inset 0 0 0 var(--line-thin) var(--color-silver-alpha);
}

.config-board::before {
  position: absolute;
  inset: 22px;
  content: "";
  border: var(--line-thin) solid var(--color-metal-light);
  clip-path: polygon(17px 0, 100% 0, 100% calc(100% - 17px), calc(100% - 17px) 100%, 0 100%, 0 17px);
  background: linear-gradient(145deg, var(--color-metal-alpha), var(--color-black-heavy));
}

.config-board-rail {
  position: absolute;
  top: 37px;
  right: 44px;
  left: 44px;
  z-index: 2;
  padding-bottom: 12px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-bottom: var(--line-thin) solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.13em;
}

.config-board-chip {
  position: absolute;
  z-index: 4;
  width: 154px;
  min-height: 88px;
  padding: 13px 15px;
  border: var(--line-thin) solid var(--color-metal-light);
  background: linear-gradient(145deg, var(--color-metal-mid), var(--color-panel));
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
}

.config-board-chip span,
.config-board-chip small {
  display: block;
  font-family: var(--font-mono);
}

.config-board-chip span {
  color: var(--color-accent);
  font-size: 0.6rem;
}

.config-board-chip strong {
  display: block;
  margin-top: 3px;
  font-family: var(--font-display);
  letter-spacing: 0.07em;
}

.config-board-chip small {
  margin-top: 4px;
  font-size: 0.55rem;
}

.config-chip-rules {
  top: 94px;
  left: 50px;
}

.config-chip-dns {
  right: 50px;
  bottom: 88px;
}

.config-chip-tun {
  bottom: 72px;
  left: 50px;
}

.config-board-core {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 5;
  width: 166px;
  height: 166px;
  transform: translate(-50%, -50%) rotate(45deg);
  display: grid;
  place-content: center;
  border: var(--line-medium) solid var(--color-metal-light);
  background: linear-gradient(145deg, var(--color-metal-mid), var(--color-black));
  box-shadow:
    inset 0 0 0 9px var(--color-panel),
    inset 0 0 0 10px var(--color-border);
  text-align: center;
}

.config-board-core span,
.config-board-core strong {
  transform: rotate(-45deg);
  display: block;
}

.config-board-core span {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
}

.config-board-core strong {
  margin-top: 3px;
  font-size: 1.08rem;
  letter-spacing: 0.06em;
}

.config-board-trace {
  position: absolute;
  z-index: 3;
  height: 3px;
  transform-origin: left center;
  background: var(--color-accent);
  box-shadow: var(--shadow-accent);
}

.trace-one {
  top: 184px;
  left: 180px;
  width: 170px;
  transform: rotate(17deg);
}

.trace-two {
  top: 299px;
  left: 179px;
  width: 160px;
  transform: rotate(-15deg);
}

.trace-three {
  top: 283px;
  left: 328px;
  width: 172px;
  transform: rotate(20deg);
}

.config-board-contact {
  position: absolute;
  bottom: 0;
  z-index: 6;
  width: 23px;
  height: 56px;
  background: var(--color-warn);
  clip-path: polygon(0 0, 100% 0, 100% 82%, 68% 100%, 0 100%);
}

.config-board-contact::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 10px;
  content: "";
  background: var(--color-accent);
}

.contact-one {
  right: 188px;
}

.contact-two {
  right: 153px;
}

.contact-three {
  right: 118px;
}

.contact-four {
  right: 83px;
}

.contact-five {
  right: 48px;
}

.deepdoc-intro {
  padding-top: clamp(64px, 8vw, 100px);
  padding-bottom: 36px;
}

.deepdoc-intro .panel {
  max-width: 1000px;
}

.deepdoc-intro .panel h2 {
  margin-bottom: 18px;
}

.deepdoc-intro .panel p:last-child {
  margin-bottom: 0;
}

.deepdoc-intro a,
.deepdoc-next a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.deepdoc-toc-section {
  padding-top: 42px;
  padding-bottom: 52px;
}

.deepdoc-toc-section h2 {
  margin-bottom: 26px;
}

.deepdoc-toc {
  top: 10px;
  margin-bottom: 0;
}

.deepdoc-manual {
  padding-bottom: 40px;
}

.deepdoc-chapter {
  position: relative;
  padding-top: clamp(72px, 9vw, 118px);
  padding-bottom: clamp(72px, 9vw, 118px);
  border-top: var(--line-thin) solid var(--color-border);
}

.deepdoc-chapter::before {
  position: absolute;
  top: -2px;
  left: 0;
  width: min(260px, 45%);
  height: 4px;
  content: "";
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.chapter-index {
  margin-bottom: 19px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.deepdoc-chapter > h2 {
  margin-top: 0;
  max-width: 900px;
}

.deepdoc-chapter > h3 {
  padding-left: 18px;
  position: relative;
}

.deepdoc-chapter > h3::before {
  position: absolute;
  top: 0.18em;
  bottom: 0.18em;
  left: 0;
  width: 3px;
  content: "";
  background: var(--color-accent-dark);
}

.deepdoc-chapter p,
.deepdoc-chapter li {
  max-width: var(--reading-width);
}

.deepdoc-chapter pre,
.deepdoc-chapter .table-wrap,
.deepdoc-chapter .callout {
  max-width: 1040px;
}

.deepdoc-chapter .table-wrap {
  margin-top: 28px;
  margin-bottom: 32px;
}

.deepdoc-chapter .data-table {
  min-width: 760px;
}

.deepdoc-chapter .data-table code {
  white-space: nowrap;
}

.deepdoc-chapter a {
  overflow-wrap: anywhere;
}

.deepdoc-next {
  padding-top: 46px;
  padding-bottom: clamp(78px, 10vw, 130px);
}

.deepdoc-next .panel {
  border-color: var(--color-accent-dark);
  background:
    linear-gradient(110deg, var(--color-accent-soft), var(--color-transparent) 55%),
    var(--color-panel);
}

.deepdoc-next-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: var(--line-thin) solid var(--color-border);
  background: var(--color-border);
}

.deepdoc-next-grid article {
  min-width: 0;
  padding: 24px;
  background: var(--color-panel);
}

.deepdoc-next-grid h3 {
  margin-bottom: 10px;
}

.deepdoc-next-grid p {
  color: var(--color-text-muted);
}

@media (max-width: 1040px) {
  .deepdoc-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .config-board {
    width: min(100%, 680px);
  }
}

@media (max-width: 760px) {
  .deepdoc-hero-grid {
    min-height: auto;
    padding-top: 58px;
    padding-bottom: 78px;
  }

  .config-board {
    height: 390px;
  }

  .config-board-chip {
    width: 126px;
    min-height: 76px;
    padding: 10px 12px;
  }

  .config-chip-rules {
    top: 82px;
    left: 34px;
  }

  .config-chip-tun {
    bottom: 58px;
    left: 34px;
  }

  .config-chip-dns {
    right: 34px;
    bottom: 70px;
  }

  .config-board-core {
    width: 132px;
    height: 132px;
  }

  .trace-one,
  .trace-two,
  .trace-three {
    display: none;
  }

  .deepdoc-next-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .deepdoc-hero-copy h1 {
    font-size: clamp(2.85rem, 14vw, 4.4rem);
  }

  .deepdoc-hero-actions {
    flex-direction: column;
  }

  .deepdoc-hero-actions .btn {
    width: 100%;
  }

  .config-board {
    height: 330px;
  }

  .config-board-rail {
    right: 28px;
    left: 28px;
  }

  .config-board-chip {
    width: 105px;
    min-height: 69px;
  }

  .config-board-chip small {
    display: none;
  }

  .config-chip-rules {
    top: 78px;
    left: 24px;
  }

  .config-chip-tun {
    bottom: 48px;
    left: 24px;
  }

  .config-chip-dns {
    right: 24px;
    bottom: 54px;
  }

  .config-board-core {
    width: 106px;
    height: 106px;
  }

  .config-board-core strong {
    font-size: 0.82rem;
  }

  .config-board-contact {
    width: 16px;
    height: 42px;
  }

  .contact-one {
    right: 128px;
  }

  .contact-two {
    right: 104px;
  }

  .contact-three {
    right: 80px;
  }

  .contact-four {
    right: 56px;
  }

  .contact-five {
    right: 32px;
  }

  .deepdoc-intro {
    padding-top: 58px;
  }

  .deepdoc-chapter {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .deepdoc-chapter > h3 {
    padding-left: 14px;
  }

  .deepdoc-next-grid article {
    padding: 20px;
  }
}