:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: #12151a;
  --line: rgba(255, 255, 255, 0.1);
  --muted: #9097a1;
  --text: #f4f6f8;
  --original: #959ca7;
  --flux: #7aa7ff;
  --omni: #ff8357;
  --seedance: #6dd9ad;
}

* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(circle at 50% -20%, #252a32 0, var(--bg) 38%); color: var(--text); font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { width: min(1500px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0 38px; }
.hero { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding-bottom: 42px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 16px; color: var(--seedance); font-size: 12px; font-weight: 700; letter-spacing: .18em; }
h1 { max-width: 900px; margin: 0; font-size: clamp(42px, 7vw, 88px); font-weight: 560; line-height: .96; letter-spacing: -.055em; }
.lede { max-width: 680px; margin: 28px 0 0; color: #b8bec6; font-size: 17px; line-height: 1.55; }
.legend { display: grid; gap: 12px; min-width: 170px; color: #c7ccd2; font-size: 13px; }
.legend span { display: flex; align-items: center; gap: 9px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.dot.original { color: var(--original); }.dot.flux { color: var(--flux); }.dot.omni { color: var(--omni); }.dot.seedance { color: var(--seedance); }
.comparison { padding: 54px 0 64px; border-bottom: 1px solid var(--line); }
.row-head { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 20px; }
.row-head > div:first-child { display: flex; align-items: baseline; gap: 14px; }
.index { color: var(--muted); font: 600 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
h2 { margin: 0; font-size: clamp(25px, 3vw, 36px); font-weight: 540; letter-spacing: -.03em; }
.video-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.video-card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); box-shadow: 0 20px 60px rgba(0,0,0,.18); }
.video-card::before { content: ""; position: absolute; inset: 0 0 auto; z-index: 2; height: 2px; background: var(--original); }
.flux-card::before { background: var(--flux); }.omni-card::before { background: var(--omni); }.seedance-card::before { background: var(--seedance); }
.label { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 15px 12px; }
.label span { font-size: 13px; font-weight: 650; }.label small { color: var(--muted); font-size: 11px; }
video { display: block; width: 100%; aspect-ratio: 9 / 16; object-fit: cover; background: #050608; }
footer { display: flex; justify-content: space-between; gap: 30px; padding-top: 28px; color: #777f89; font-size: 11px; letter-spacing: .05em; text-transform: uppercase; }

@media (max-width: 850px) {
  main { width: min(100% - 24px, 700px); padding-top: 36px; }
  .hero { display: block; }.legend { grid-template-columns: repeat(3, auto); justify-content: start; margin-top: 28px; }
  .row-head { align-items: flex-start; flex-direction: column; }
  .video-grid { grid-template-columns: 1fr; gap: 18px; }
  video { max-height: 78vh; object-fit: contain; }
  footer { flex-direction: column; }
}