.gate-hero { display: grid; grid-template-columns: minmax(280px, .8fr) minmax(0, 1.5fr); gap: clamp(28px, 4vw, 64px); align-items: center; margin-top: 32px; }
.gate-hero h1 { font-size: clamp(34px, 3.4vw, 50px); line-height: 1.12; text-wrap: balance; }
.gate-intro { margin-top: 22px; max-width: 60ch; color: var(--muted); font-size: 16px; }
.gate-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; margin-top: 26px; }
.gate-scope { margin-top: 18px; font-size: 12px; color: var(--muted); }
.gate-film { min-width: 0; }
.gate-video { border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: var(--mineral); }
.gate-video video { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; }
.gate-sound { position: absolute; right: 12px; bottom: 12px; display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: var(--paper); color: var(--accent); }
.gate-sound:hover { background: var(--accent-soft); }
.gate-sound .gate-sound-off, .gate-sound[data-muted=true] .gate-sound-on { display: none; }
.gate-sound[data-muted=true] .gate-sound-off { display: block; }
.gate-film figcaption { font-size: 12px; }
.gate-section { margin-top: clamp(56px, 7vw, 104px); }
.gate-section-heading { max-width: 800px; margin-bottom: 34px; }
.gate-section-heading h2, .gate-final h2 { font-size: clamp(30px, 3.3vw, 46px); line-height: 1.15; text-wrap: balance; }
.gate-section-heading > p:not(.gate-status) { color: var(--muted); margin-top: 20px; max-width: 70ch; }
.gate-architecture { display: grid; grid-template-columns: minmax(0, 1fr) 44px minmax(240px, 1.1fr) 44px minmax(0, 1fr); gap: 24px; align-items: center; }
.gate-endpoint h3 { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.gate-endpoint ul { padding: 0; margin: 0; list-style: none; }
.gate-endpoint li { border-top: 1px solid var(--line); padding: 12px 0; }
.gate-connector { color: var(--accent); font-size: 32px; text-align: center; }
.gate-hub { border: 1px solid var(--line); background: var(--accent-soft); padding: 36px 24px; text-align: center; border-radius: 20px; }
.gate-hub-name { color: var(--accent); font-size: clamp(30px, 3vw, 40px); font-weight: 700; letter-spacing: -.035em; }
.gate-hub > p { font-size: 14px; color: var(--muted); margin-top: 4px; }
.gate-hub ul { margin: 24px 0 0; padding: 18px 0 0; list-style: none; border-top: 1px solid var(--line); font-size: 13px; color: var(--accent); }
.gate-hub li + li { margin-top: 6px; }
.gate-architecture figcaption { grid-column: 1 / -1; margin-top: 8px; max-width: 900px; }
.gate-example-note { font-size: 13px; color: var(--accent); border-left: 2px solid var(--accent); padding-left: 16px; max-width: 850px; margin-bottom: 24px; }
.gate-scenario-tabs { display: flex; gap: 8px; border-bottom: 1px solid var(--line); }
.gate-scenario-tabs button { padding: 16px 20px; color: var(--muted); border: 0; border-bottom: 2px solid transparent; background: none; font-size: 15px; }
.gate-scenario-tabs button[aria-selected=true] { color: var(--accent); border-bottom-color: var(--accent); }
.gate-scenario { padding-top: 28px; }
.gate-scenario + .gate-scenario { margin-top: 32px; }
.gate-tabs-ready .gate-scenario { margin-top: 0; }
.gate-tabs-ready .gate-scenario-name { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.gate-conversation { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 64px); }
.gate-question > p:last-child { font: 400 clamp(22px, 2.2vw, 28px)/1.35 var(--display); }
.gate-speaker { font-size: 12px; color: var(--accent); margin-bottom: 12px; font-weight: 600; }
.gate-answer > p:last-child { color: var(--muted); margin-top: 0; }
.gate-data { margin-top: 30px; }
.gate-data table { width: 100%; border-collapse: collapse; font-size: 14px; }
.gate-data caption { text-align: left; color: var(--muted); font-size: 12px; padding-bottom: 10px; }
.gate-data th { text-align: left; background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 600; }
.gate-data td, .gate-data th { padding: 14px 16px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.gate-status { color: var(--accent); font-size: 13px; font-weight: 600; margin-bottom: 16px; }
.gate-security { padding-top: 48px; border-top: 1px solid var(--line); }
.gate-principles { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; margin: 0; }
.gate-principles > div { border-top: 1px solid var(--line); padding: 22px 0; }
.gate-principles dt { font-size: 20px; margin-bottom: 10px; }
.gate-principles dd { margin: 0; color: var(--muted); font-size: 15px; }
.gate-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; padding: 0; margin: 0; list-style: none; counter-reset: none; }
.gate-steps li { border-top: 1px solid var(--accent); padding-top: 20px; }
.gate-step-number { display: block; color: var(--accent); font-size: 13px; margin-bottom: 20px; }
.gate-steps h3 { font-size: 20px; margin-bottom: 12px; }
.gate-steps p { font-size: 14px; color: var(--muted); }
.gate-roadmap { padding: clamp(24px, 4vw, 40px); background: var(--accent-soft); border-radius: 24px; }
.gate-roadmap ul { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 40px; }
.gate-roadmap li { padding: 14px 0; border-top: 1px solid var(--line); break-inside: avoid; font-size: 17px; }
.gate-final { border-top: 1px solid var(--line); padding-top: 48px; }
.gate-final p { max-width: 660px; margin: 22px 0 26px; color: var(--muted); }
@media (max-width: 1100px) {
  .gate-hero { grid-template-columns: minmax(250px, .85fr) minmax(0, 1.15fr); gap: 28px; }
  .gate-architecture { grid-template-columns: minmax(0, 1fr) 24px minmax(200px, 1fr) 24px minmax(0, 1fr); gap: 12px; }
  .gate-endpoint li { font-size: 14px; }
  .gate-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .gate-hero { grid-template-columns: 1fr; margin-top: 24px; }
  .gate-hero h1 { font-size: clamp(32px, 6vw, 44px); max-width: 22ch; }
  .gate-video { border-radius: 16px; }
  .gate-architecture { grid-template-columns: 1fr; gap: 16px; }
  .gate-endpoint { min-width: 0; }
  .gate-endpoint ul { display: flex; flex-wrap: wrap; gap: 8px 20px; }
  .gate-endpoint li { padding: 10px 0; }
  .gate-connector { transform: rotate(90deg); line-height: 1; }
  .gate-hub { padding: 26px; }
  .gate-conversation, .gate-principles { grid-template-columns: 1fr; gap: 24px; }
  .gate-principles { gap: 0; }
  .gate-scenario-tabs { flex-wrap: wrap; gap: 0; }
  .gate-scenario-tabs button { flex: 1 1 130px; padding: 14px 8px; font-size: 13px; }
  .gate-data table { table-layout: fixed; font-size: 12px; }
  .gate-data th, .gate-data td { padding: 10px 8px; }
  .gate-roadmap ul { columns: 1; }
}
@media (max-width: 420px) {
  .gate-steps { grid-template-columns: 1fr; }
}