:root {
  --bg: #0a0e12;
  --bg-2: #0e141a;
  --panel: #111922;
  --panel-2: #0c131a;
  --ink: #e8f3f1;
  --ink-soft: #aebdc0;
  --muted: #6f8488;
  --cyan: #3df0e0;
  --cyan-d: #1fb6ac;
  --cyan-glow: rgba(61, 240, 224, 0.5);
  --red: #ff3b4d;
  --red-glow: rgba(255, 59, 77, 0.45);
  --line: rgba(120, 200, 196, 0.14);
  --line-2: rgba(120, 200, 196, 0.26);
  --f: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --m: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 6px;
}

html, body { overflow-x: clip; }
body { font-family: var(--f); color: var(--ink); background: var(--bg); }
.bh { background:
    radial-gradient(900px 480px at 78% -8%, rgba(31, 182, 172, 0.12), transparent 60%),
    radial-gradient(700px 420px at -6% 12%, rgba(255, 59, 77, 0.07), transparent 60%),
    var(--bg);
}
.bh ::selection { background: var(--cyan); color: #04211f; }
.bh .container { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }
.bh h1, .bh h2, .bh h3 { font-family: var(--f); letter-spacing: -0.02em; font-weight: 700; color: var(--ink); line-height: 1.06; }
.bh em { font-style: normal; color: var(--cyan); }
.bh p { margin: 0; }
.bh img { max-width: 100%; }

.bh .reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.bh .reveal.in { opacity: 1; transform: none; }

.bh .klabel {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--m); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--cyan);
}
.bh .klabel::before { content: ""; width: 10px; height: 10px; background: var(--cyan); box-shadow: 0 0 10px var(--cyan-glow); }

.bh .shead { max-width: 680px; margin: 0 0 46px; }
.bh .shead .klabel { margin-bottom: 16px; }
.bh .shead h2 { font-size: clamp(1.9rem, 3.7vw, 2.9rem); margin: 0 0 14px; }
.bh .shead p { color: var(--ink-soft); font-size: 1.04rem; line-height: 1.62; }

.bh .btn {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer;
  font-family: var(--m); font-weight: 700; font-size: 0.82rem; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 13px 24px; border-radius: var(--radius); border: 1px solid var(--cyan); transition: 0.25s var(--ease);
  background: var(--cyan); color: #04211f; box-shadow: 0 0 0 0 var(--cyan-glow);
}
.bh .btn svg { width: 17px; height: 17px; }
.bh .btn:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -12px var(--cyan-glow), 0 0 18px -2px var(--cyan-glow); }
.bh .btn.ghost { background: transparent; color: var(--cyan); border-color: var(--line-2); box-shadow: none; }
.bh .btn.ghost:hover { border-color: var(--cyan); background: rgba(61, 240, 224, 0.07); box-shadow: none; }

.bh .nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 14, 18, 0.82); backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.bh .nav-in { display: flex; align-items: center; gap: 20px; height: 72px; }
.bh .brand { display: inline-flex; align-items: center; flex: none; }
.bh .brand-logo { height: 30px; width: auto; }
.bh .nav-links { display: flex; align-items: center; gap: 26px; margin-left: auto; }
.bh .nav-links > a:not(.btn) { font-family: var(--m); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-soft); transition: color 0.2s; }
.bh .nav-links > a:not(.btn):hover { color: var(--cyan); }
.bh .nav-links .btn { padding: 10px 18px; }
.bh .burger { display: none; background: none; border: 0; color: var(--ink); cursor: pointer; padding: 6px; margin-left: auto; }
.bh .burger svg { width: 26px; height: 26px; }
.bh .nav-home {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 13px; border-radius: var(--radius);
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.03); color: var(--ink-soft); flex: none;
  font-family: var(--m); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.02em; transition: 0.2s;
}
.bh .nav-home:hover { border-color: var(--cyan); color: var(--cyan); }

.bh .scanlines {
  position: absolute; inset: 0; pointer-events: none; z-index: 2; opacity: 0.5;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, 0) 2px, rgba(0, 0, 0, 0.18) 3px, rgba(0, 0, 0, 0) 4px);
}

.bh .trace-line { stroke: var(--cyan); stroke-width: 2; filter: drop-shadow(0 0 4px var(--cyan-glow)); stroke-linejoin: round; stroke-linecap: round; }
.bh .trace-line.t1 { stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: draw 3.2s var(--ease) 0.3s forwards; }
.bh .trace-line.t2 { stroke: var(--red); stroke-width: 1.5; opacity: 0.7; filter: drop-shadow(0 0 4px var(--red-glow)); stroke-dasharray: 1600; stroke-dashoffset: 1600; animation: draw 3.6s var(--ease) 0.6s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.bh .hero { position: relative; padding: clamp(40px, 6vw, 78px) 0 clamp(54px, 7vw, 92px); border-bottom: 1px solid var(--line); overflow: hidden; }
.bh .hero-in { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr 1.04fr; gap: clamp(36px, 5vw, 64px); align-items: center; }
.bh .hero-tag { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.bh .rec { display: inline-flex; align-items: center; gap: 8px; font-family: var(--m); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; color: var(--red); }
.bh .rec i { width: 9px; height: 9px; border-radius: 50%; background: var(--red); box-shadow: 0 0 10px var(--red-glow); animation: blink 1.4s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0.25; } }
.bh .hero-kor { font-family: var(--m); font-size: 0.74rem; letter-spacing: 0.08em; color: var(--muted); }
.bh .hero h1 { font-size: clamp(2.3rem, 5vw, 3.7rem); margin: 0 0 20px; }
.bh .hero h1 em { text-shadow: 0 0 26px var(--cyan-glow); }
.bh .hero-lead { font-size: clamp(1rem, 1.5vw, 1.14rem); color: var(--ink-soft); max-width: 540px; line-height: 1.68; }
.bh .hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.bh .scope { background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--line-2); border-radius: 12px; padding: 14px; box-shadow: 0 40px 90px -44px rgba(0, 0, 0, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.04); }
.bh .scope-top { display: flex; align-items: center; justify-content: space-between; padding: 4px 6px 12px; }
.bh .scope-name { font-family: var(--m); font-size: 0.72rem; letter-spacing: 0.16em; color: var(--muted); }
.bh .scope-leds { display: inline-flex; gap: 7px; }
.bh .scope-leds i { width: 8px; height: 8px; border-radius: 50%; background: rgba(120, 200, 196, 0.2); }
.bh .scope-leds i.on { background: var(--cyan); box-shadow: 0 0 9px var(--cyan-glow); }
.bh .scope-screen {
  position: relative; aspect-ratio: 16 / 9; border-radius: 8px; overflow: hidden;
  background: radial-gradient(120% 130% at 50% 40%, #0c1a1c, #060d10 78%);
  border: 1px solid rgba(61, 240, 224, 0.22); box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.6), inset 0 0 0 1px rgba(0, 0, 0, 0.4);
}
.bh .scope-screen::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, 0) 2px, rgba(0, 0, 0, 0.22) 3px);
}
.bh .scope-screen .graticule, .bh .scope-screen .trace { position: absolute; inset: 0; width: 100%; height: 100%; }
.bh .sweep { position: absolute; top: 0; bottom: 0; width: 2px; left: 0; background: linear-gradient(180deg, transparent, var(--cyan), transparent); box-shadow: 0 0 14px var(--cyan-glow); opacity: 0.65; animation: sweep 4.2s linear 0.3s infinite; }
@keyframes sweep { 0% { left: 0; } 100% { left: 100%; } }
.bh .scope-tag { position: absolute; font-family: var(--m); font-size: 0.62rem; letter-spacing: 0.08em; color: rgba(61, 240, 224, 0.7); z-index: 2; }
.bh .scope-tag.tl { top: 9px; left: 11px; }
.bh .scope-tag.tr { top: 9px; right: 11px; color: rgba(255, 59, 77, 0.78); }
.bh .scope-tag.bl { bottom: 9px; left: 11px; }
.bh .scope-tag.br { bottom: 9px; right: 11px; }
.bh .scope-readout { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 12px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.bh .ro { background: var(--panel-2); padding: 12px 12px 13px; }
.bh .ro-k { display: block; font-family: var(--m); font-size: 0.58rem; letter-spacing: 0.16em; color: var(--cyan-d); }
.bh .ro strong { display: block; font-family: var(--m); font-size: clamp(0.96rem, 1.6vw, 1.18rem); font-weight: 700; color: var(--cyan); margin: 4px 0 3px; text-shadow: 0 0 12px var(--cyan-glow); line-height: 1.05; }
.bh .ro-l { display: block; font-size: 0.66rem; color: var(--muted); line-height: 1.32; }

.bh .log { padding: clamp(58px, 8vw, 98px) 0; }
.bh .log-grid { display: grid; grid-template-columns: 1.06fr 0.94fr; gap: clamp(36px, 5vw, 60px); align-items: center; }
.bh .log-copy h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 16px 0 18px; }
.bh .log-copy > p { color: var(--ink-soft); line-height: 1.74; margin: 0 0 14px; }
.bh .ledger { margin-top: 28px; border-top: 1px solid var(--line); }
.bh .led-row { display: grid; grid-template-columns: 0.42fr 0.58fr; gap: 18px; padding: 16px 2px; border-bottom: 1px solid var(--line); }
.bh .led-row dt { display: flex; align-items: baseline; gap: 11px; margin: 0; font-weight: 600; font-size: 0.98rem; color: var(--ink); }
.bh .led-no { font-family: var(--m); font-size: 0.72rem; font-weight: 700; color: var(--cyan); }
.bh .led-row dd { margin: 0; font-size: 0.88rem; color: var(--muted); line-height: 1.55; }

.bh .log-feed { position: relative; padding: 12px; background: var(--panel-2); border: 1px solid var(--line-2); border-radius: 10px; }
.bh .feed-bkt { position: absolute; width: 16px; height: 16px; border: 2px solid var(--cyan); z-index: 2; }
.bh .feed-bkt.tl { top: 6px; left: 6px; border-right: 0; border-bottom: 0; }
.bh .feed-bkt.tr { top: 6px; right: 6px; border-left: 0; border-bottom: 0; }
.bh .feed-bkt.bl { bottom: 6px; left: 6px; border-right: 0; border-top: 0; }
.bh .feed-bkt.br { bottom: 6px; right: 6px; border-left: 0; border-top: 0; }
.bh .log-feed img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 6px; filter: saturate(1.08); }
.bh .log-feed figcaption { display: flex; align-items: center; gap: 8px; margin-top: 11px; font-family: var(--m); font-size: 0.7rem; letter-spacing: 0.04em; color: var(--muted); }
.bh .log-feed figcaption .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan-glow); }

.bh .channels { padding: clamp(58px, 8vw, 98px) 0; border-top: 1px solid var(--line); background: var(--bg-2); }
.bh .chan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.bh .chan { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 24px 24px 28px; overflow: hidden; transition: border-color 0.3s var(--ease), transform 0.3s var(--ease); }
.bh .chan::before { content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 100%; background: var(--cyan); box-shadow: 0 0 14px var(--cyan-glow); opacity: 0.7; }
.bh .chan:hover { transform: translateY(-5px); border-color: var(--line-2); }
.bh .chan-head { display: flex; align-items: center; justify-content: space-between; }
.bh .chan-ch { font-family: var(--m); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; color: var(--cyan); }
.bh .chan-band { font-family: var(--m); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--muted); padding: 4px 9px; border: 1px solid var(--line); border-radius: 100px; }
.bh .chan-scope { margin: 16px 0 18px; height: 56px; background: radial-gradient(120% 130% at 50% 40%, #0a1618, #060d10); border: 1px solid rgba(61, 240, 224, 0.18); border-radius: 6px; overflow: hidden; }
.bh .chan-scope svg { width: 100%; height: 100%; display: block; }
.bh .chan-wave { stroke: var(--cyan); stroke-width: 2; fill: none; stroke-linejoin: round; stroke-linecap: round; filter: drop-shadow(0 0 3px var(--cyan-glow)); stroke-dasharray: 700; stroke-dashoffset: 700; }
.bh .chan.in .chan-wave { animation: draw 2.4s var(--ease) 0.2s forwards; }
.bh .chan h3 { font-size: 1.26rem; margin: 0 0 9px; }
.bh .chan p { color: var(--muted); font-size: 0.92rem; line-height: 1.6; }

.bh .sig { padding: clamp(58px, 8vw, 100px) 0; }
.bh .sig-grid { display: grid; grid-template-columns: 0.96fr 1.04fr; gap: clamp(36px, 5vw, 60px); align-items: center; }
.bh .sig-feed { position: relative; background: var(--panel); border: 1px solid var(--line-2); border-radius: 12px; padding: 12px; box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.9); }
.bh .feed-top { display: flex; align-items: center; justify-content: space-between; padding: 4px 6px 11px; font-family: var(--m); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--muted); }
.bh .feed-rec { display: inline-flex; align-items: center; gap: 7px; color: var(--red); }
.bh .feed-rec i { width: 8px; height: 8px; border-radius: 50%; background: var(--red); box-shadow: 0 0 8px var(--red-glow); animation: blink 1.4s steps(1) infinite; }
.bh .feed-screen { position: relative; border-radius: 8px; overflow: hidden; aspect-ratio: 4 / 3; border: 1px solid rgba(61, 240, 224, 0.22); background: #060d10; }
.bh .feed-screen img { width: 100%; height: 100%; object-fit: cover; }
.bh .feed-screen::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, 0) 2px, rgba(0, 0, 0, 0.2) 3px); }
.bh .feed-scan { position: absolute; left: 0; right: 0; height: 38%; top: -38%; background: linear-gradient(180deg, transparent, rgba(61, 240, 224, 0.16), transparent); animation: vscan 4.6s linear 0.5s infinite; }
@keyframes vscan { 0% { top: -38%; } 100% { top: 100%; } }
.bh .feed-badge { position: absolute; right: -12px; bottom: -14px; display: flex; flex-direction: column; align-items: center; gap: 2px; background: var(--bg); color: var(--cyan); border: 1px solid var(--cyan); border-radius: 8px; padding: 11px 18px; box-shadow: 0 0 24px -6px var(--cyan-glow); }
.bh .feed-badge strong { font-family: var(--m); font-size: 1.2rem; font-weight: 700; line-height: 1; text-shadow: 0 0 12px var(--cyan-glow); }
.bh .feed-badge span { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.bh .sig-copy h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); margin: 16px 0 16px; }
.bh .sig-sub { color: var(--ink-soft); line-height: 1.7; margin: 0 0 28px; max-width: 560px; }
.bh .specs { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 22px; }
.bh .spec { display: flex; gap: 13px; }
.bh .spec-id { font-family: var(--m); font-size: 0.72rem; font-weight: 700; color: var(--cyan); flex: none; padding-top: 2px; }
.bh .spec b { display: block; font-size: 0.96rem; margin-bottom: 3px; }
.bh .spec span { font-size: 0.84rem; color: var(--muted); line-height: 1.5; }
.bh .sig-free { margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); }
.bh .free-label { display: block; font-family: var(--m); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--red); margin-bottom: 11px; }
.bh .sig-free .chips { display: flex; flex-wrap: wrap; gap: 7px; }
.bh .sig-free .chips span { font-family: var(--m); font-size: 0.74rem; color: var(--ink-soft); background: rgba(255, 59, 77, 0.08); border: 1px solid rgba(255, 59, 77, 0.3); padding: 6px 12px; border-radius: 100px; }
.bh .sig-free .chips span::before { content: "× "; color: var(--red); font-weight: 700; }

.bh .strip { padding: clamp(58px, 8vw, 98px) 0; border-top: 1px solid var(--line); background: var(--bg-2); }
.bh .film { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.bh .frame { display: flex; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; transition: border-color 0.3s var(--ease), transform 0.3s var(--ease); }
.bh .frame:hover { transform: translateY(-5px); border-color: var(--line-2); }
.bh .frame-shot { position: relative; flex: none; width: 150px; background: #060d10; border-right: 1px solid var(--line); overflow: hidden; }
.bh .frame-shot img { width: 100%; height: 100%; object-fit: cover; }
.bh .frame-shot::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, 0) 2px, rgba(0, 0, 0, 0.2) 3px); }
.bh .frame-ch { position: absolute; top: 8px; left: 8px; z-index: 2; font-family: var(--m); font-size: 0.62rem; font-weight: 700; letter-spacing: 0.08em; color: var(--cyan); background: rgba(6, 13, 16, 0.7); padding: 2px 6px; border: 1px solid rgba(61, 240, 224, 0.3); border-radius: 3px; }
.bh .frame-scan { position: absolute; left: 0; right: 0; height: 2px; top: 0; background: var(--cyan); opacity: 0.45; box-shadow: 0 0 10px var(--cyan-glow); animation: vscan 5s linear infinite; }
.bh .frame-body { padding: 22px 22px 24px; display: flex; flex-direction: column; }
.bh .frame-head { display: flex; align-items: baseline; gap: 9px; flex-wrap: wrap; margin-bottom: 9px; }
.bh .frame-head h3 { font-size: 1.3rem; margin: 0; }
.bh .frame-en { font-family: var(--m); font-size: 0.72rem; color: var(--cyan); }
.bh .frame-body > p { color: var(--muted); font-size: 0.9rem; line-height: 1.6; margin: 0 0 14px; }
.bh .frame-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.bh .frame-chips span { font-family: var(--m); font-size: 0.68rem; color: var(--ink-soft); background: rgba(61, 240, 224, 0.07); border: 1px solid var(--line); padding: 4px 9px; border-radius: 4px; }

.bh .proof { padding: clamp(58px, 8vw, 96px) 0; border-top: 1px solid var(--line); }
.bh .board { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.bh .board-row { display: grid; grid-template-columns: 54px 1fr auto; align-items: center; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line); transition: background 0.2s; }
.bh .board-row:last-child { border-bottom: 0; }
.bh .board-row:nth-child(odd) { background: rgba(120, 200, 196, 0.02); }
.bh .board-row:hover { background: rgba(61, 240, 224, 0.05); }
.bh .board-id { font-family: var(--m); font-size: 0.74rem; font-weight: 700; color: var(--muted); }
.bh .board-label { font-size: 0.96rem; color: var(--ink); }
.bh .board-ok { display: inline-flex; align-items: center; gap: 7px; font-family: var(--m); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.12em; color: var(--cyan); }
.bh .board-ok::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan-glow); }

.bh .time { padding: clamp(58px, 8vw, 100px) 0; border-top: 1px solid var(--line); background: var(--bg-2); }
.bh .tbase { position: relative; padding-left: 8px; }
.bh .tbase::before { content: ""; position: absolute; left: 86px; top: 6px; bottom: 6px; width: 1px; background: linear-gradient(180deg, transparent, var(--line-2) 8%, var(--line-2) 92%, transparent); }
.bh .tb { display: grid; grid-template-columns: 78px 1fr; gap: 26px; position: relative; padding: 0 0 26px; }
.bh .tb:last-child { padding-bottom: 0; }
.bh .tb-year { font-family: var(--m); font-weight: 700; font-size: 0.96rem; color: var(--cyan); text-align: right; padding-top: 1px; }
.bh .tb-tick { position: absolute; left: 86px; top: 7px; width: 9px; height: 9px; border-radius: 50%; background: var(--bg-2); border: 2px solid var(--cyan); transform: translateX(-50%); box-shadow: 0 0 9px var(--cyan-glow); z-index: 1; }
.bh .tb p { color: var(--ink-soft); font-size: 0.94rem; line-height: 1.6; padding-top: 0; }

.bh .docs { padding: clamp(54px, 8vw, 88px) 0; border-top: 1px solid var(--line); }
.bh .doc-list { display: flex; flex-direction: column; gap: 10px; }
.bh .doc-row { display: flex; align-items: center; gap: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 18px 22px; transition: 0.25s var(--ease); }
.bh .doc-row:hover { border-color: var(--cyan); background: rgba(61, 240, 224, 0.04); transform: translateY(-2px); }
.bh .doc-no { font-family: var(--m); font-size: 0.76rem; font-weight: 700; color: var(--cyan); flex: none; }
.bh .doc-label { font-size: 0.98rem; color: var(--ink); flex: 1; }
.bh .doc-meta { font-family: var(--m); font-size: 0.7rem; letter-spacing: 0.06em; color: var(--muted); }
.bh .doc-arr { width: 20px; height: 20px; color: var(--cyan); flex: none; transition: transform 0.25s var(--ease); }
.bh .doc-row:hover .doc-arr { transform: translateY(3px); }

.bh .close { padding: clamp(58px, 8vw, 100px) 0; }
.bh .close-card { position: relative; overflow: hidden; background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--line-2); border-radius: 14px; padding: clamp(40px, 5vw, 64px) clamp(26px, 4vw, 56px); text-align: center; box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.9); }
.bh .close-wave { position: absolute; left: 0; right: 0; bottom: 0; height: 60px; opacity: 0.5; }
.bh .close-wave svg { width: 100%; height: 100%; }
.bh .close-card .klabel { justify-content: center; margin-bottom: 14px; position: relative; z-index: 2; }
.bh .close-card h2 { position: relative; z-index: 2; font-size: clamp(1.7rem, 3vw, 2.4rem); margin: 0 0 12px; }
.bh .close-card p { position: relative; z-index: 2; color: var(--ink-soft); max-width: 580px; margin: 0 auto 26px; line-height: 1.7; }
.bh .close-card .btn { position: relative; z-index: 2; }
.bh .foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--m); font-size: 0.74rem; letter-spacing: 0.02em; }

@media (max-width: 980px) {
  .bh .nav-links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px 24px 24px; margin-left: 0;
    transform: translateY(-130%); transition: transform 0.35s var(--ease); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8);
  }
  body.menu-open .bh .nav-links { transform: translateY(0); }
  .bh .nav-links > a:not(.btn) { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .bh .nav-links .btn { margin-top: 12px; justify-content: center; }
  .bh .burger { display: inline-flex; }
  .bh .nav-home .lbl { display: none; }
  .bh .hero-in, .bh .log-grid, .bh .sig-grid { grid-template-columns: 1fr; }
  .bh .scope { max-width: 600px; margin: 8px auto 0; width: 100%; }
  .bh .log-feed { order: -1; max-width: 560px; }
  .bh .chan-grid { grid-template-columns: 1fr 1fr; }
  .bh .film { grid-template-columns: 1fr; }
  .bh .specs { grid-template-columns: 1fr; }
  .bh .feed-badge { right: 8px; }
}
@media (max-width: 600px) {
  .bh .container { width: calc(100% - 32px); }
  .bh .scope-readout { grid-template-columns: 1fr 1fr; }
  .bh .chan-grid { grid-template-columns: 1fr; }
  .bh .led-row { grid-template-columns: 1fr; gap: 6px; }
  .bh .frame { flex-direction: column; }
  .bh .frame-shot { width: 100%; height: 160px; border-right: 0; border-bottom: 1px solid var(--line); }
  .bh .board-row { grid-template-columns: 36px 1fr; gap: 12px; }
  .bh .board-ok { grid-column: 2; justify-self: start; margin-top: 2px; }
  .bh .tbase::before, .bh .tb-tick { left: 70px; }
  .bh .tb { grid-template-columns: 62px 1fr; gap: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .bh *, .bh *::before, .bh *::after { animation: none !important; }
  .bh .trace-line, .bh .chan-wave { stroke-dashoffset: 0 !important; }
}