.channel-start { margin: 28px 0 44px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.channel-start__grid { display: grid; grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); }
.channel-start__example { margin: 0; padding: 24px; border-right: 1px solid var(--border); background: rgba(0, 0, 0, .12); }
.channel-start__eyebrow { display: block; margin-bottom: 12px; color: var(--accent); font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.channel-start__example video { display: block; width: min(100%, 220px); height: auto; aspect-ratio: 9 / 16; margin: 0 auto; border-radius: 10px; background: #080c16; object-fit: contain; }
.channel-start__example figcaption { margin-top: 14px; font-size: .86rem; line-height: 1.55; color: var(--muted); }
.channel-start__form { padding: 28px; min-width: 0; }
.channel-start__form h2 { margin: 0 0 10px; font-size: clamp(1.4rem, 2.5vw, 1.8rem); line-height: 1.2; }
.channel-start__form > p { margin: 0 0 18px; }
.channel-start__field { display: grid; gap: 8px; margin-bottom: 16px; font-weight: 600; }
.channel-start__field textarea, .channel-start__field select { box-sizing: border-box; width: 100%; min-height: 44px; border: 1px solid var(--border); border-radius: 8px; padding: 11px 12px; color: var(--text); background: #111726; font: inherit; font-weight: 400; }
.channel-start__field textarea { min-height: 118px; resize: vertical; line-height: 1.5; }
.channel-start__field textarea:focus, .channel-start__field select:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.channel-start__presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; }
.channel-start__preset { min-height: 38px; padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px; color: var(--text); background: transparent; font: inherit; font-size: .82rem; cursor: pointer; text-align: left; }
.channel-start__preset:hover, .channel-start__preset:focus-visible { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.channel-start__form .btn { width: 100%; white-space: normal; text-align: center; }
.channel-start__note { margin: 12px 0 0 !important; font-size: .82rem; line-height: 1.5; color: var(--muted); }
.channel-start__error { color: #ffb2b2; font-size: .9rem; }
.channel-example-detail { margin: 30px 0; padding: 24px; border-left: 3px solid var(--accent); background: var(--card); }
.channel-example-detail h2 { margin-top: 0; }
.channel-example-detail ol { margin-bottom: 0; }
.channel-start, .channel-case { scroll-margin-top: 100px; }
.channel-case .channel-case__source { font-size: .86rem; line-height: 1.55; color: var(--muted); }
.channel-case__metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 24px 0; }
.channel-case__metrics > div { min-width: 0; padding: 16px 0; border-block: 1px solid var(--border); }
.channel-case__metrics dt { font-size: .8rem; line-height: 1.4; color: var(--muted); }
.channel-case__metrics dd { margin: 10px 0 0; font-size: clamp(1.3rem, 2.6vw, 2rem); font-weight: 700; line-height: 1.2; }
.channel-case__videos { width: 100%; margin: 24px 0; border-collapse: collapse; font-size: .92rem; line-height: 1.5; }
.channel-case__videos caption { margin-bottom: 12px; text-align: left; color: var(--muted); }
.channel-case__videos th, .channel-case__videos td { padding: 12px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.channel-case__videos th[scope="row"] { font-weight: 400; }
.channel-case__videos td { white-space: nowrap; }
.seo-product-page .section { padding: 32px 0 72px; }
.seo-product-page .article { max-width: 1040px; padding: 20px 24px 48px; }
.seo-product-page .article h1 { margin: 18px 0; }
.seo-product-page .article .lead { max-width: 900px; margin: 14px 0 24px; }
@media (max-width: 700px) {
  .seo-product-page .section { padding-top: 16px; }
  .seo-product-page .article { padding: 12px 18px 32px; }
  .seo-product-page .article h1 { margin: 12px 0; font-size: 1.9rem; }
  .seo-product-page .article .lead { margin: 12px 0 20px; font-size: 1rem; line-height: 1.6; }
  .channel-start { margin-top: 20px; }
  .channel-start__grid { grid-template-columns: 1fr; }
  .channel-start__example { border-right: 0; border-top: 1px solid var(--border); padding: 20px; }
  .channel-start__example video { width: 180px; }
  .channel-start__form { grid-row: 1; padding: 20px 16px; }
  .channel-start__form h2 { font-size: 1.3rem; }
  .channel-start__form > p { font-size: .95rem; line-height: 1.5; }
  .channel-start__form .btn { min-height: 48px; padding: 12px 14px; font-size: 1rem; line-height: 1.4; }
  .channel-start__form .channel-start__note { font-size: .82rem; }
  .channel-case { padding: 20px 16px; }
  .channel-case__metrics { grid-template-columns: 1fr; gap: 0; }
  .channel-case__metrics > div { display: flex; align-items: center; justify-content: space-between; gap: 14px; border-bottom: 0; }
  .channel-case__metrics > div:last-child { border-bottom: 1px solid var(--border); }
  .channel-case__metrics dd { margin: 0; flex-shrink: 0; }
  .channel-case__videos { font-size: .85rem; }
}