.download-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-light);
  background:
    linear-gradient(90deg, var(--color-wall-shadow), var(--color-transparent) 28%, var(--color-transparent)),
    linear-gradient(180deg, var(--color-transparent), var(--color-bg-deep));
}

.download-hero::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 11%;
  width: 2px;
  content: "";
  background: var(--color-success);
  box-shadow: 0 0 15px var(--color-success-glow);
  opacity: 0.55;
}

.download-hero-grid {
  position: relative;
  display: grid;
  min-height: 590px;
  padding-top: clamp(70px, 9vw, 118px);
  padding-bottom: clamp(72px, 9vw, 112px);
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, 0.88fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: center;
}

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

.download-hero-copy h1 {
  max-width: 760px;
  color: var(--color-accent-soft);
  text-shadow:
    0 0 3px var(--color-accent),
    0 0 20px var(--color-accent-glow-soft);
}

.download-lead {
  max-width: 710px;
  margin-bottom: 25px;
  color: var(--color-text);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
}

.download-hero-note {
  display: flex;
  max-width: 710px;
  margin-top: 28px;
  padding: 18px 20px;
  align-items: flex-start;
  gap: 14px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-warn);
  border-radius: var(--radius-small);
  background: var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.download-hero-note p {
  margin: 0;
  font-size: 14px;
}

.download-signal {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  flex-shrink: 0;
  border-radius: var(--radius-circle);
  background: var(--color-warn);
  box-shadow: 0 0 13px var(--color-warn-glow);
}

.selector-board {
  position: relative;
  min-width: 0;
  min-height: 390px;
  padding: 28px;
  overflow: hidden;
  border: 3px solid var(--color-metal-light);
  border-radius: var(--radius-zero);
  background:
    linear-gradient(90deg, var(--color-brick-highlight) 1px, var(--color-transparent) 1px),
    linear-gradient(var(--color-brick-highlight) 1px, var(--color-transparent) 1px),
    linear-gradient(145deg, var(--color-metal), var(--color-metal-dark));
  background-size: 32px 32px, 32px 32px, auto;
  box-shadow: var(--shadow-frame);
}

.selector-board::before,
.selector-board::after {
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--color-metal-dark);
  border-radius: var(--radius-circle);
  content: "";
  background: var(--color-bolt);
}

.selector-board::before {
  top: 13px;
  right: 13px;
}

.selector-board::after {
  right: 13px;
  bottom: 13px;
}

.selector-line {
  position: absolute;
  background: var(--color-success);
  box-shadow: 0 0 12px var(--color-success-glow);
}

.selector-line-main {
  top: 102px;
  left: 50%;
  width: 3px;
  height: 94px;
  transform: translateX(-50%);
}

.selector-node {
  position: absolute;
  display: grid;
  place-items: center;
  border: 2px solid var(--color-border-light);
  color: var(--color-text);
  background: var(--color-bg-deep);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.12em;
  box-shadow: var(--shadow-panel);
}

.selector-node-source {
  top: 67px;
  left: 50%;
  width: 112px;
  height: 62px;
  transform: translateX(-50%);
}

.selector-branch {
  position: absolute;
  top: 194px;
  right: 22px;
  left: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.selector-branch::before {
  position: absolute;
  top: -15px;
  right: 16%;
  left: 16%;
  height: 3px;
  content: "";
  background: var(--color-success);
  box-shadow: 0 0 12px var(--color-success-glow);
}

.selector-branch span {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 62px;
  padding: 8px;
  place-items: center;
  border: 2px solid var(--color-border-light);
  color: var(--color-success-soft);
  background: var(--color-bg-panel);
  font-family: var(--font-display);
  font-weight: 760;
  box-shadow: var(--shadow-panel);
}

.selector-branch span::before {
  position: absolute;
  top: -17px;
  left: 50%;
  width: 3px;
  height: 17px;
  content: "";
  background: var(--color-success);
  transform: translateX(-50%);
}

.selector-formats {
  position: absolute;
  right: 22px;
  bottom: 37px;
  left: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.selector-formats code {
  min-width: 0;
  padding: 9px 5px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-bg-deep);
  font-size: 10px;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.download-catalog {
  background: linear-gradient(180deg, var(--color-bg-deep), var(--color-bg));
}

.platform-intro {
  display: grid;
  margin-bottom: 28px;
  padding: clamp(22px, 4vw, 34px);
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.78fr);
  gap: 30px;
  align-items: start;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-small);
  background: var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.platform-intro h3 {
  margin-bottom: 12px;
}

.platform-intro p {
  margin-bottom: 0;
}

.requirement-table {
  min-width: 0;
}

.requirement-table table {
  min-width: 470px;
}

.requirement-table th,
.requirement-table td {
  padding: 11px 13px;
  font-size: 12px;
}

.download-grid {
  align-items: stretch;
}

.download-grid-single {
  grid-template-columns: minmax(0, 720px);
}

.client-card {
  min-height: 290px;
}

.client-icon {
  width: 48px;
  height: 48px;
}

.client-title .badge-row {
  margin-bottom: 9px;
}

.client-title h3 {
  overflow-wrap: anywhere;
}

.client-card p {
  line-height: 1.8;
}

.client-actions .button {
  min-height: 44px;
}

.client-version:not([hidden]) {
  display: inline-block;
  margin-top: 3px;
}

.core-section {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(90deg, var(--color-success-glow-soft), var(--color-transparent) 35%),
    var(--color-bg-panel);
}

.core-table-wrap {
  margin-top: 34px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-panel);
}

.core-table {
  min-width: 780px;
}

.core-table td:last-child {
  width: 230px;
}

.core-table .button {
  width: 100%;
  min-height: 42px;
}

.core-notes {
  display: grid;
  margin-top: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.core-notes .panel {
  box-shadow: none;
}

.core-notes p {
  margin-bottom: 0;
}

.selection-guide {
  background: linear-gradient(180deg, var(--color-bg), var(--color-bg-deep));
}

.download-steps {
  display: grid;
  max-width: 1000px;
  margin: 0;
  padding: 0;
  gap: 0;
  list-style: none;
}

.download-steps li {
  position: relative;
  display: grid;
  min-width: 0;
  padding: 0 0 34px 92px;
  grid-template-columns: minmax(0, 1fr);
}

.download-steps li::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 29px;
  width: 3px;
  content: "";
  background: var(--color-success);
  box-shadow: 0 0 10px var(--color-success-glow);
}

.download-steps li:last-child::before {
  bottom: 50%;
}

.download-steps li > div {
  min-width: 0;
  padding: 24px 26px;
  border: 1px solid var(--color-border);
  border-top-color: var(--color-border-light);
  border-radius: var(--radius-small);
  background: var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.download-steps h3 {
  margin-bottom: 10px;
}

.download-steps p {
  margin-bottom: 0;
}

.step-number {
  position: absolute;
  top: 17px;
  left: 0;
  z-index: 2;
  display: grid;
  width: 60px;
  height: 60px;
  place-items: center;
  border: 2px solid var(--color-success);
  border-radius: var(--radius-circle);
  color: var(--color-bg-deep);
  background: var(--color-success);
  box-shadow: 0 0 0 7px var(--color-bg-deep), 0 0 18px var(--color-success-glow);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.download-faq {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.faq-more {
  display: flex;
  margin-top: 28px;
  padding: 22px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-panel);
}

.faq-more p {
  margin: 0;
}

.faq-more .button {
  flex-shrink: 0;
}

@media (max-width: 980px) {
  .download-hero-grid {
    min-height: auto;
    grid-template-columns: minmax(0, 1fr);
  }

  .selector-board {
    width: 100%;
    max-width: 640px;
    min-height: 360px;
  }

  .platform-intro {
    grid-template-columns: minmax(0, 1fr);
  }

  .core-notes {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .download-hero::before {
    left: 8px;
  }

  .download-hero-grid {
    padding-top: 58px;
    padding-bottom: 66px;
    gap: 38px;
  }

  .download-hero-copy h1 {
    font-size: clamp(40px, 13vw, 56px);
  }

  .download-lead {
    font-size: 16px;
  }

  .download-hero-note {
    padding: 16px;
  }

  .selector-board {
    min-height: 330px;
    padding: 18px;
  }

  .selector-node-source {
    top: 60px;
  }

  .selector-line-main {
    top: 94px;
    height: 82px;
  }

  .selector-branch {
    top: 176px;
    right: 10px;
    left: 10px;
    gap: 6px;
  }

  .selector-branch span {
    min-height: 56px;
    font-size: 14px;
  }

  .selector-formats {
    right: 10px;
    bottom: 30px;
    left: 10px;
    gap: 6px;
  }

  .selector-formats code {
    font-size: 8px;
  }

  .platform-intro {
    padding: 20px;
  }

  .requirement-table table {
    min-width: 460px;
  }

  .client-card {
    min-height: 0;
  }

  .client-head {
    align-items: flex-start;
  }

  .client-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .client-actions .button {
    width: 100%;
  }

  .core-notes {
    grid-template-columns: minmax(0, 1fr);
  }

  .download-steps li {
    padding: 0 0 26px 52px;
  }

  .download-steps li::before {
    left: 20px;
  }

  .download-steps li > div {
    padding: 20px;
  }

  .step-number {
    top: 14px;
    width: 42px;
    height: 42px;
    box-shadow: 0 0 0 4px var(--color-bg-deep), 0 0 14px var(--color-success-glow);
    font-size: 10px;
  }

  .faq-more {
    align-items: stretch;
    flex-direction: column;
  }

  .faq-more .button {
    width: 100%;
  }
}