:root {
  --vent-ink: #10141a;
  --vent-muted: #5d6876;
  --vent-line: #d7e0e7;
  --vent-soft: #eef4f7;
  --vent-blue: #169bd5;
  --vent-dark: #101a24;
}

.vent-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.vent-library-hero {
  position: relative;
  min-height: clamp(400px, 43vw, 560px);
  display: grid;
  overflow: hidden;
  color: #fff;
  background: var(--vent-dark);
  border-bottom: 1px solid var(--vent-line);
}

.vent-library-hero-media,
.vent-library-hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.vent-library-hero-media {
  object-fit: cover;
  object-position: center 50%;
  transform: scale(1.01);
}

.vent-library-hero-shade {
  background:
    linear-gradient(90deg, rgba(6, 13, 19, .84) 0%, rgba(6, 13, 19, .58) 43%, rgba(6, 13, 19, .08) 78%),
    linear-gradient(0deg, rgba(6, 13, 19, .34), transparent 55%);
}

.vent-library-hero-shell {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  padding-top: clamp(52px, 7vw, 92px);
  padding-bottom: clamp(48px, 6vw, 78px);
}

.vent-library-hero-content {
  max-width: 920px;
}

.vent-library-hero-description {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, .86);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.5;
}

.vent-library-hero .detail-kicker {
  color: #a9dcf3;
}

.vent-library-hero h1 {
  max-width: 920px;
  margin: 14px 0 0;
  color: #fff;
  font-size: clamp(52px, 6.2vw, 92px);
  line-height: .96;
  letter-spacing: 0;
  text-wrap: balance;
}

.vent-library-hero-cta {
  min-height: 52px;
  margin-top: clamp(30px, 4vw, 44px);
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--vent-ink);
  background: #fff;
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: 5px;
  font-size: 15px;
  font-weight: 800;
  transition: color .2s ease, background .2s ease, transform .2s ease;
}

.vent-library-hero-cta:hover,
.vent-library-hero-cta:focus-visible {
  color: #fff;
  background: var(--vent-blue);
  border-color: var(--vent-blue);
  transform: translateY(-2px);
}

.vent-library-hero-actions {
  position: relative;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(30px, 4vw, 44px);
  pointer-events: auto;
}

.vent-library-hero-actions .vent-library-hero-cta {
  margin-top: 0;
}

.vent-library-hero-back {
  position: relative;
  z-index: 3;
  min-height: auto;
  padding: 8px 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  gap: 10px;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
  pointer-events: auto;
  transition: color .2s ease, background .2s ease, transform .2s ease;
}

.vent-library-hero-back:hover,
.vent-library-hero-back:focus-visible {
  color: #78cbea;
  background: transparent;
  transform: translateX(-3px);
}

.vent-system-carousel {
  display: block;
  min-height: 0;
  overflow: hidden;
  isolation: isolate;
}

.vent-system-carousel-viewport {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}

.vent-system-carousel-viewport::-webkit-scrollbar { display: none; }

.vent-system-carousel-track {
  width: 100%;
  display: flex;
}

.vent-system-carousel-slide {
  position: relative;
  flex: 0 0 100%;
  height: clamp(440px, 48vw, 620px);
  overflow: hidden;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.vent-system-carousel-slide .vent-library-hero-media { z-index: 0; }
.vent-system-carousel-slide .vent-library-hero-shade { z-index: 1; }

.vent-system-carousel-hit {
  position: absolute;
  inset: 0;
  z-index: 2;
  cursor: pointer;
}

.vent-system-carousel-slide .vent-library-hero-shell {
  z-index: 3;
  min-height: 100%;
  padding-bottom: clamp(48px, 6vw, 78px);
  pointer-events: none;
}

.vent-system-carousel-slide .vent-library-hero-content { pointer-events: none; }
.vent-system-carousel-slide .vent-library-hero-cta {
  position: relative;
  z-index: 3;
  pointer-events: auto;
}

.vent-system-carousel-slide h1,
.vent-system-carousel-slide h2 {
  max-width: 1000px;
  margin: 14px 0 0;
  color: #fff;
  font-size: clamp(52px, 6.2vw, 92px);
  line-height: .96;
  letter-spacing: 0;
  text-wrap: balance;
}

.vent-system-carousel-toolbar {
  position: absolute;
  top: clamp(22px, 3vw, 36px);
  left: 50%;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  transform: translateX(-50%);
  pointer-events: none;
}

.vent-system-carousel-counter {
  margin: 0;
  color: rgba(255, 255, 255, .82);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

.vent-system-carousel-controls {
  display: flex;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 5px;
  overflow: hidden;
  pointer-events: auto;
  backdrop-filter: blur(12px);
}

.vent-system-carousel-controls button {
  width: 48px;
  height: 44px;
  display: grid;
  place-items: center;
  color: #fff;
  background: rgba(7, 15, 22, .38);
  border: 0;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: color .2s ease, background .2s ease;
}

.vent-system-carousel-controls button + button {
  border-left: 1px solid rgba(255, 255, 255, .35);
}

.vent-system-carousel-controls button:hover,
.vent-system-carousel-controls button:focus-visible {
  color: #08141d;
  background: #fff;
}

.vent-system-carousel-tabs-wrap {
  position: relative;
  z-index: 5;
  background: #fff;
}

.vent-system-carousel-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid #cad5de;
}

.vent-system-carousel-tabs :is(a, button) {
  position: relative;
  min-width: 0;
  padding: 17px 16px 13px 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #617386;
  background: transparent;
  border: 0;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
  transition: color .3s ease;
}

.vent-system-carousel-tabs :is(a, button)::before {
  content: "";
  position: absolute;
  top: -1px;
  right: 16px;
  left: 0;
  height: 2px;
  background: var(--vent-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.vent-system-carousel-number {
  flex: 0 0 auto;
  color: #8796a5;
  font-size: 10px;
  letter-spacing: .12em;
}

.vent-system-carousel-tabs :is(a, button):hover,
.vent-system-carousel-tabs :is(a, button):focus-visible,
.vent-system-carousel-tabs :is(a, button).is-active {
  color: var(--vent-ink);
}

.vent-system-carousel-tabs :is(a, button).is-active::before {
  transform: scaleX(1);
}

.vent-library-index {
  padding: clamp(34px, 4vw, 58px) 0 clamp(50px, 6vw, 88px);
  background: #fff;
}

.vent-library-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--vent-line);
  border-left: 1px solid var(--vent-line);
}

.vent-library-card {
  min-height: 220px;
  padding: clamp(24px, 3vw, 38px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 22px;
  color: var(--vent-ink);
  background: #fff;
  border-right: 1px solid var(--vent-line);
  border-bottom: 1px solid var(--vent-line);
  transition: color .25s ease, background .25s ease, transform .25s ease;
}

.vent-library-card:hover,
.vent-library-card:focus-visible {
  color: #fff;
  background: var(--vent-dark);
  transform: translateY(-2px);
}

.vent-library-number,
.vent-library-link {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.vent-library-number { color: var(--vent-blue); }

.vent-library-card h2 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(23px, 2.2vw, 34px);
  line-height: 1.12;
  letter-spacing: 0;
}

.vent-library-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.vent-library-link span { color: var(--vent-blue); }

.vent-library-systems {
  padding: clamp(50px, 6vw, 82px) 0;
  color: #fff;
  background: var(--vent-dark);
}

.vent-library-section-head { margin-bottom: 32px; }
.vent-library-section-head h2 {
  max-width: 700px;
  margin: 10px 0 0;
  color: #fff;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.04;
}

.vent-system-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255,255,255,.2);
  border-left: 1px solid rgba(255,255,255,.2);
}

.vent-system-links a {
  min-height: 145px;
  padding: 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: end;
  color: #fff;
  border-right: 1px solid rgba(255,255,255,.2);
  border-bottom: 1px solid rgba(255,255,255,.2);
  transition: background .2s ease;
}

.vent-system-links a:hover,
.vent-system-links a:focus-visible { background: rgba(255,255,255,.08); }
.vent-system-links span { color: var(--vent-blue); font-size: 12px; font-weight: 800; }
.vent-system-links strong { font-size: clamp(20px, 2vw, 28px); line-height: 1.1; }
.vent-system-links i { color: var(--vent-blue); font-style: normal; font-size: 24px; }

.vent-reader-page {
  padding: 36px 0 clamp(70px, 8vw, 120px);
  color: var(--vent-ink);
  background: #f7fafb;
}

.vent-reader-back {
  padding: 20px 0 38px;
}

.vent-reader-back a {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--vent-muted);
  font-size: 14px;
  font-weight: 700;
}

.vent-reader-back a:hover,
.vent-reader-back a:focus-visible { color: var(--vent-ink); }

.vent-reader {
  padding: clamp(34px, 6vw, 84px) clamp(24px, 8vw, 120px);
  background: #fff;
  border: 1px solid var(--vent-line);
}

.vent-reader-header,
.vent-reader-body {
  max-width: 820px;
  margin: 0 auto;
}

.vent-reader-header {
  padding-bottom: clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--vent-line);
}

.vent-reader-index {
  margin: 18px 0;
  color: var(--vent-muted);
  font-size: 13px;
  font-weight: 700;
}

.vent-reader h1 {
  margin: 0;
  font-size: clamp(42px, 5.3vw, 76px);
  line-height: 1.01;
  letter-spacing: 0;
}

.vent-reader-lead {
  margin: 32px 0 0;
  color: #3f4d5c;
  font-size: clamp(20px, 2vw, 25px);
  line-height: 1.55;
}

.vent-reader-body {
  padding-top: clamp(38px, 6vw, 72px);
}

.vent-reader-body section + section { margin-top: clamp(42px, 6vw, 68px); }

.vent-reader-body h2 {
  max-width: 720px;
  margin: 0 0 22px;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.12;
  letter-spacing: 0;
}

.vent-reader-body p {
  margin: 0 0 20px;
  color: #303d49;
  font-size: 18px;
  line-height: 1.78;
}

.vent-reader-formula {
  margin: 28px 0;
  padding: 22px 24px;
  overflow-x: auto;
  color: #fff;
  background: var(--vent-dark);
  border-left: 4px solid var(--vent-blue);
  font: 700 clamp(17px, 2vw, 22px)/1.45 ui-monospace, SFMono-Regular, Consolas, monospace;
  white-space: nowrap;
}

.vent-reader-table-wrap {
  max-width: 100%;
  margin: 28px 0;
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--vent-line);
  -webkit-overflow-scrolling: touch;
}

.vent-reader-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  color: #303d49;
  font-size: 16px;
  line-height: 1.5;
}

.vent-reader-table th,
.vent-reader-table td {
  padding: 15px 18px;
  text-align: left;
  border-right: 1px solid var(--vent-line);
  border-bottom: 1px solid var(--vent-line);
}

.vent-reader-table th {
  color: var(--vent-ink);
  background: var(--vent-soft);
  font-weight: 800;
}

.vent-reader-table th:last-child,
.vent-reader-table td:last-child { border-right: 0; }
.vent-reader-table tbody tr:last-child td { border-bottom: 0; }

.vent-reader-body p a,
.vent-reader-table a {
  color: #087cad;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.vent-reader-body p a:hover,
.vent-reader-body p a:focus-visible,
.vent-reader-table a:hover,
.vent-reader-table a:focus-visible { color: var(--vent-ink); }

.vent-reader-body blockquote {
  margin: clamp(52px, 7vw, 82px) 0 0;
  padding: 30px 0 0;
  color: var(--vent-ink);
  border-top: 3px solid var(--vent-ink);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 750;
  line-height: 1.28;
}

.vent-reader-sources {
  padding-top: 34px;
  border-top: 1px solid var(--vent-line);
}

.vent-reader-sources h2 { font-size: 24px; }
.vent-reader-sources ol { margin: 0; padding: 0; list-style: none; }
.vent-reader-sources li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid var(--vent-line);
}
.vent-reader-sources li span { color: var(--vent-blue); font-size: 12px; font-weight: 800; }
.vent-reader-sources a { color: #3f4d5c; text-decoration: underline; text-underline-offset: 3px; }

.vent-reader-pager {
  max-width: 820px;
  margin: clamp(54px, 7vw, 86px) auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--vent-line);
  border-left: 1px solid var(--vent-line);
}

.vent-reader-pager a {
  min-height: 148px;
  padding: 22px;
  display: grid;
  gap: 12px;
  align-content: start;
  border-right: 1px solid var(--vent-line);
  border-bottom: 1px solid var(--vent-line);
}
.vent-reader-pager span { color: var(--vent-muted); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.vent-reader-pager strong { font-size: 18px; line-height: 1.3; }
.vent-reader-pager a:hover,
.vent-reader-pager a:focus-visible { background: var(--vent-soft); }

@media (max-width: 767px) {
  .vent-library-hero { min-height: 390px; padding: 0; }
  .vent-library-hero-shade {
    background:
      linear-gradient(0deg, rgba(6, 13, 19, .88) 0%, rgba(6, 13, 19, .55) 58%, rgba(6, 13, 19, .12) 100%);
  }
  .vent-library-hero-shell { padding-top: 48px; padding-bottom: 38px; }
  .vent-library-hero-content { width: 100%; }
  .vent-library-hero h1 { max-width: 100%; font-size: clamp(38px, 10.2vw, 48px); line-height: 1.01; }
  .vent-library-hero-description { max-width: 34rem; margin-top: 14px; font-size: 15px; line-height: 1.42; }
  .vent-library-hero-cta { width: min(100%, 280px); margin-top: 28px; }
  .vent-library-hero-actions { flex-wrap: nowrap; gap: 8px; margin-top: 28px; }
  .vent-library-hero-actions .vent-library-hero-cta,
  .vent-library-hero-actions .vent-library-hero-back {
    flex: 1 1 0;
    width: auto;
    min-width: 0;
    min-height: 48px;
    margin-top: 0;
    padding-right: 10px;
    padding-left: 10px;
    font-size: 12px;
  }
  .vent-library-hero-actions .vent-library-hero-back {
    flex: 0 0 auto;
    width: auto;
    min-height: auto;
    padding: 10px 2px;
    font-size: 10px;
  }
  .vent-system-carousel { min-height: 0; }
  .vent-system-carousel-slide {
    flex-basis: calc(100% - 24px);
    height: clamp(460px, 68svh, 590px);
  }
  .vent-system-carousel-slide .vent-library-hero-shell {
    padding-top: 88px;
    padding-bottom: 38px;
  }
  .vent-system-carousel-slide h1,
  .vent-system-carousel-slide h2 {
    max-width: 100%;
    font-size: clamp(38px, 10.2vw, 48px);
    line-height: 1.01;
  }
  .vent-system-carousel-toolbar {
    top: 18px;
    justify-content: space-between;
  }
  .vent-system-carousel-controls button {
    width: 46px;
    height: 42px;
  }
  .vent-system-carousel-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    margin-top: 0;
    padding-bottom: 14px;
    border-top: 0;
    scrollbar-width: none;
  }
  .vent-system-carousel-tabs-wrap { padding-top: 14px; }
  .vent-system-carousel-tabs::-webkit-scrollbar { display: none; }
  .vent-system-carousel-tabs :is(a, button) {
    flex: 0 0 44px;
    width: 44px;
    height: 34px;
    min-height: 34px;
    padding: 10px 0;
    justify-content: center;
    overflow: hidden;
    color: #617386;
    border: 1px solid #ccd6df;
    border-radius: 20px;
    font-size: 0;
    text-align: center;
  }
  .vent-system-carousel-tabs :is(a, button)::before { display: none; }
  .vent-system-carousel-number { color: inherit; font-size: 10px; }
  .vent-system-carousel-tabs :is(a, button).is-active {
    color: #13212c;
    background: #dfe5ea;
    border-color: #dfe5ea;
  }
  .vent-system-carousel-label { display: none; }
  .vent-library-index { padding: 18px 0 48px; }
  .vent-library-grid { grid-template-columns: 1fr; }
  .vent-library-card { min-height: 180px; padding: 24px 20px; gap: 18px; }
  .vent-library-card h2 { font-size: clamp(24px, 7.4vw, 31px); }
  .vent-library-systems { padding: 46px 0; }
  .vent-system-links { grid-template-columns: 1fr; }
  .vent-system-links a { min-height: 104px; }
  .vent-reader-page { padding-top: 10px; }
  .vent-reader-back { padding: 14px 0 24px; }
  .vent-reader { width: 100%; padding: 38px max(20px, env(safe-area-inset-left)); border-left: 0; border-right: 0; }
  .vent-reader h1 { font-size: clamp(36px, 10.6vw, 50px); line-height: 1.04; }
  .vent-reader-lead { margin-top: 24px; font-size: 19px; line-height: 1.55; }
  .vent-reader-body p { font-size: 17px; line-height: 1.7; }
  .vent-reader-body h2 { font-size: clamp(27px, 8vw, 35px); }
  .vent-reader-formula { margin-left: -20px; margin-right: -20px; padding: 20px; font-size: 16px; }
  .vent-reader-table-wrap { margin-left: -20px; margin-right: -20px; max-width: calc(100% + 40px); }
  .vent-reader-table { font-size: 15px; }
  .vent-reader-pager { grid-template-columns: 1fr; }
  .vent-reader-pager a { min-height: 118px; }
}

@media (prefers-reduced-motion: reduce) {
  .vent-library-card,
  .vent-system-links a,
  .vent-library-hero-cta,
  .vent-library-hero-back,
  .vent-system-carousel-controls button,
  .vent-system-carousel-tabs :is(a, button) { transition: none; }
}
.vent-product-context-link {
  display: inline-flex;
  width: fit-content;
  margin: 4px 0 14px;
  color: inherit;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}