:root {
  --ink: #0b1420;
  --muted: #617084;
  --paper: #f6f4ef;
  --line: rgba(15, 31, 48, .14);
  --blue: #215bff;
  --green: #34e28b;
  --yellow: #ffc83d;
  --red: #ff3d57;
  --control-radius: 4px;
  --focus-ring: #215bff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  position: relative;
  isolation: isolate;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}
body::before {
  content: "";
  width: 390px;
  height: 600px;
  position: fixed;
  z-index: 0;
  top: 50%;
  right: 6vw;
  transform: translateY(-50%);
  pointer-events: none;
  opacity: .2;
  background: center / contain no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 390 600'%3E%3Cg fill='none' stroke='%238fa1b8' stroke-width='2'%3E%3Crect x='122' y='32' width='146' height='48' rx='4'/%3E%3Crect x='122' y='80' width='146' height='104' rx='5'/%3E%3Crect x='122' y='184' width='146' height='104' rx='5'/%3E%3Crect x='122' y='288' width='146' height='104' rx='5'/%3E%3Cpath d='M112 181h166M112 285h166M124 392h142v92c0 15-12 27-27 27h-88c-15 0-27-12-27-27z'/%3E%3Crect x='155' y='511' width='80' height='30' rx='8'/%3E%3Cpath d='M173 541v42h44v-42M122 583h146c14 0 24 7 24 17H98c0-10 10-17 24-17zM145 80v312M170 80v312M195 80v312M220 80v312M245 80v312' opacity='.55'/%3E%3C/g%3E%3Cpath d='M122 184h146' stroke='%23ff5265' stroke-width='4'/%3E%3Cpath d='M122 288h146' stroke='%23ffc83d' stroke-width='4'/%3E%3Cpath d='M122 392h146' stroke='%2334e28b' stroke-width='4'/%3E%3Cg fill='%235f79a2' font-family='monospace' font-size='9' letter-spacing='2'%3E%3Ctext x='8' y='180'%3E01 / SIGNAL TOWER%3C/text%3E%3Ctext x='285' y='292'%3ESTATUS%3C/text%3E%3Ctext x='285' y='306'%3EBEACON%3C/text%3E%3C/g%3E%3Cpath d='M30 190h74M282 288h78M315 58h45M315 58v110' fill='none' stroke='%238fa1b8' stroke-width='1' stroke-dasharray='5 6'/%3E%3C/svg%3E");
}
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: var(--control-radius);
}
main { position: relative; z-index: 1; overflow: hidden; }

.nav {
  width: min(1240px, calc(100% - 48px));
  height: 82px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: .1em; font-size: 13px; }
.brand-mark { width: 25px; height: 30px; display: flex; flex-direction: column; gap: 2px; }
.brand-mark i { flex: 1; border-radius: 2px; background: var(--ink); }
.brand-mark i:first-child { background: #0a1d33; }
.brand-mark i:nth-child(2) { background: var(--yellow); }
.brand-mark i:nth-child(3) { background: var(--green); }
.nav-links { display: flex; gap: 34px; color: #435165; font-size: 13px; }
.nav-links a:hover { color: var(--blue); }
.nav-actions { display: flex; align-items: center; gap: 9px; }
.language-toggle {
  min-width: 43px;
  padding: 10px 11px;
  color: var(--ink);
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .08em;
}
.language-toggle:hover { color: var(--blue); border-color: var(--blue); background: white; }
.nav-cta { padding: 11px 17px; color: white; background: var(--ink); border-radius: 4px; font-size: 12px; font-weight: 800; }

.hero {
  width: min(1240px, calc(100% - 48px));
  min-height: 720px;
  margin: auto;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  align-items: center;
  gap: 44px;
}
.product-edition {
  width: fit-content;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  padding: 7px 9px 7px 11px;
  color: #536278;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.52);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: .14em;
}
.product-edition b { padding: 5px 8px; color: white; background: var(--ink); letter-spacing: .1em; }
.product-edition i { color: var(--blue); font-style: normal; }
.eyebrow, .section-kicker { text-transform: uppercase; letter-spacing: .16em; font-size: 12px; font-weight: 800; color: #536278; }
.eyebrow span { width: 7px; height: 7px; display: inline-block; margin-right: 10px; border-radius: 50%; background: var(--yellow); box-shadow: 0 0 0 5px rgba(255,200,61,.18); }
.hero h1 { margin: 24px 0; font-size: clamp(56px, 5.7vw, 82px); line-height: 1.1; letter-spacing: -.035em; font-weight: 900; }
.hero h1 > span { white-space: nowrap; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead { width: min(650px, 100%); color: var(--muted); line-height: 1.9; font-size: 16px; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }
.primary-button { padding: 16px 20px; background: var(--blue); color: white; border-radius: var(--control-radius); font-weight: 800; font-size: 14px; box-shadow: 0 14px 35px rgba(33,91,255,.22); }
.primary-button span { padding-left: 22px; }
.buy-button {
  padding: 16px 20px;
  color: white;
  border-radius: var(--control-radius);
  background: var(--ink);
  box-shadow: 0 14px 30px rgba(11,20,32,.18);
  font-size: 14px;
  font-weight: 800;
  transition: transform .18s, background .18s;
}
.buy-button span { padding-left: 18px; }
.buy-button:hover { background: #173451; transform: translateY(-2px); }
.text-button { font-size: 13px; font-weight: 800; border-bottom: 1px solid #9ba4b1; padding-bottom: 5px; }
.text-button span { margin-left: 12px; }
.hero-meta { display: flex; gap: 28px; margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--line); color: #778397; font-size: 11px; }
.hero-meta b { color: var(--ink); margin-right: 6px; }
.hero-visual {
  position: relative;
  min-height: 630px;
  display: grid;
  place-items: center;
  background: radial-gradient(circle, #e7ebee 0, #edf0ef 45%, transparent 70%);
}
.signal-orbit { position: absolute; border: 1px solid rgba(31,77,138,.12); border-radius: 50%; }
.orbit-one { width: 440px; height: 440px; }
.orbit-two { width: 570px; height: 570px; }
.signal-orbit::after { content: ""; position: absolute; top: 50%; left: -4px; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 7px rgba(33,91,255,.11); }
.floating-card {
  position: absolute; z-index: 5; display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; background: rgba(255,255,255,.88); border: 1px solid white;
  border-radius: 6px; box-shadow: 0 18px 45px rgba(28,44,68,.13); backdrop-filter: blur(10px);
}
.floating-card span { color: #526075; font-size: 11px; }
.floating-card b { font-size: 9px; letter-spacing: .14em; }
.card-top { top: 21%; right: 0; }
.card-top { display: grid; grid-template-columns: auto auto; }
.card-top b { grid-column: 2; }
.yellow-pulse { grid-row: 1 / 3; width: 10px; height: 10px; border-radius: 50%; background: var(--yellow); box-shadow: 0 0 0 7px rgba(255,200,61,.18); animation: pulse 1.35s ease-in-out infinite; }
.card-bottom { left: 3%; bottom: 17%; }
.card-bottom div { display: flex; flex-direction: column; gap: 3px; }
.connection-icon { font-size: 24px !important; color: var(--blue) !important; }

.product-tower { position: relative; z-index: 3; width: 112px; filter: drop-shadow(0 28px 18px rgba(20,34,48,.22)); }
.tower-cap { height: 42px; margin: 0 6px -2px; border-radius: 4px 4px 0 0; background: linear-gradient(90deg,#cbd1d3,#fff 38%,#f1f2ee 68%,#aeb6b9); border: 1px solid #e2e5e4; box-shadow: inset 0 -5px 8px rgba(60,72,78,.1); }
.tower-lamp { height: 72px; margin: 0 7px; position: relative; border: 2px solid rgba(12,18,24,.72); background: #111820; overflow: visible; }
.tower-lamp.red { --lamp: var(--red); background: #2c1118; }
.tower-lamp.yellow { --lamp: var(--yellow); background: #2d2510; }
.tower-lamp.green { --lamp: var(--green); background: #102b20; }
.tower-lens { position: absolute; inset: 0; opacity: .18; background: repeating-linear-gradient(90deg,rgba(255,255,255,.15) 0 3px,transparent 3px 9px),var(--lamp); transition: opacity .16s; }
.tower-lamp.active .tower-lens { opacity: 1; box-shadow: 0 0 28px color-mix(in srgb, var(--lamp) 68%, transparent), inset 0 0 18px rgba(255,255,255,.3); }
.tower-ring { position: absolute; z-index: 2; left: -4px; right: -4px; bottom: -4px; height: 6px; background: #151b21; }
.control-body { height: 82px; margin: -1px 6px 0; display: grid; place-items: center; border-radius: 3px 3px 9px 9px; background: linear-gradient(90deg,#b9c1c3,#fff 35%,#edf0ec 68%,#aab3b6); border: 1px solid #d8dddd; }
.control-body span { color: #69757d; font-size: 6px; font-weight: 900; letter-spacing: .13em; }
.product-buzzer { display: flex; gap: 3px; margin-top: -20px; }
.product-buzzer i { width: 3px; height: 3px; border-radius: 50%; background: #69757d; box-shadow: inset 0 1px 1px rgba(0,0,0,.4); }
.metal-collar { width: 62px; height: 20px; margin: -3px auto 0; border-radius: 4px 4px 8px 8px; background: linear-gradient(90deg,#747e83,#e8eae7 40%,#9fa8ab 72%,#5e686d); }
.metal-post { width: 38px; height: 68px; margin: auto; background: linear-gradient(90deg,#566167,#dce0df 22%,#f5f6f3 46%,#a5afb2 70%,#4f5a60); }
.mount-foot { height: 24px; border-radius: 6px 6px 11px 11px; background: linear-gradient(90deg,#59646a,#d8dddb 30%,#eff1ee 52%,#8f999d 80%,#4d575d); }
.state-thinking .yellow .tower-lens { animation: pulse 1.35s ease-in-out infinite; }
.state-approval .red .tower-lens { animation: pulse .8s ease-in-out infinite; }
.state-error .red .tower-lens { animation: errorPulse .62s ease-in-out infinite; }
.state-done .green .tower-lens { animation: donePulse 4.8s ease-in-out infinite; }
.state-offline .red .tower-lens { animation: offlinePulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity:.2 } 50% { opacity:1 } }
@keyframes errorPulse { 0%,100% { opacity:.14 } 50% { opacity:1 } }
@keyframes offlinePulse { 0%,100% { opacity:.3 } 50% { opacity:.88 } }
@keyframes donePulse { 0%,12.5%,25%,37.5%,100% { opacity:1 } 6.25%,18.75%,31.25% { opacity:.14 } }

.statement { padding: 110px 24px; text-align: center; color: white; background: var(--ink); }
.statement p { margin: 0; color: #96a4b7; font-size: 18px; }
.statement h2 { margin: 12px 0 0; font-size: clamp(40px, 6vw, 80px); line-height: 1.16; letter-spacing: -.025em; }

.brand-origin {
  width: min(1160px, calc(100% - 48px));
  min-height: 360px;
  margin: auto;
  padding: 78px 0;
  display: grid;
  grid-template-columns: 180px 1fr 150px;
  align-items: center;
  gap: 58px;
  border-bottom: 1px solid var(--line);
}
.brand-origin-number {
  align-self: start;
  color: transparent;
  -webkit-text-stroke: 1px #aeb9c7;
  font: 900 96px/.85 Georgia, serif;
  letter-spacing: -.08em;
}
.brand-origin-copy p { margin: 0 0 18px; color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .18em; }
.brand-origin-copy h2 { margin: 0 0 24px; font-size: clamp(34px, 4.2vw, 58px); line-height: 1.06; letter-spacing: -.055em; }
.brand-origin-copy span { max-width: 670px; display: block; color: var(--muted); font-size: 15px; line-height: 1.9; }
.brand-origin-mark {
  width: 126px;
  height: 126px;
  padding: 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  background: white;
  box-shadow: 0 20px 45px rgba(28,42,60,.08);
}
.brand-origin-mark i { width: 38px; height: 11px; display: block; border-radius: 2px; background: #0a1d33; }
.brand-origin-mark i:nth-child(2) { background: var(--yellow); }
.brand-origin-mark i:nth-child(3) { background: var(--green); }
.brand-origin-mark b { position: absolute; right: 18px; bottom: 14px; color: #c7d0db; font: 900 21px/1 Georgia, serif; }

.demo-section, .features, .system-section, .progress-section { width: min(1160px, calc(100% - 48px)); margin: auto; padding: 120px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 50px; margin-bottom: 48px; }
.section-heading h2, .system-copy h2, .progress-section h2 { margin: 8px 0 0; font-size: clamp(36px, 5vw, 64px); letter-spacing: -.025em; line-height: 1.16; }
.section-heading > p { width: 420px; margin: 0; color: var(--muted); line-height: 1.8; font-size: 14px; }
.section-heading.compact { margin-bottom: 38px; }
.demo-shell { min-height: 630px; display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); background: white; box-shadow: 0 28px 70px rgba(28,42,60,.08); }
.simulator-embed {
  width: 100%;
  height: 760px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #08111f;
  box-shadow: 0 28px 70px rgba(28,42,60,.08);
}
.simulator-embed iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}
.demo-stage { position: relative; display: grid; place-items: center; overflow: hidden; background: #111a26; }
.stage-grid { position: absolute; inset: 0; background: linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px); background-size: 38px 38px; }
.stage-label { position: absolute; left: 24px; bottom: 20px; color: #67768a; font-size: 9px; font-weight: 800; letter-spacing: .18em; }
.demo-panel { padding: 54px; align-self: center; }
.current-state { display: flex; justify-content: space-between; align-items: end; margin-top: 35px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.current-state div { display: flex; flex-direction: column; gap: 6px; }
.current-state span { color: var(--muted); font-size: 11px; }
.current-state strong { font-size: 35px; letter-spacing: -.04em; }
.current-state code { color: var(--blue); font-size: 11px; font-weight: 900; }
.state-detail { min-height: 48px; color: var(--muted); line-height: 1.7; font-size: 13px; }
.state-buttons { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; margin-top: 24px; }
.state-buttons button, .approve-action { display: flex; align-items: center; gap: 9px; padding: 12px 13px; border: 1px solid var(--line); background: #f7f8f8; color: #4a596d; cursor: pointer; font-size: 12px; font-weight: 700; }
.state-buttons button:hover, .state-buttons button.selected { color: var(--ink); border-color: #7e8da0; background: white; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #93a0ae; }
.dot-thinking { background: var(--yellow); }
.dot-approval, .dot-error, .dot-offline { background: var(--red); }
.dot-done, .dot-idle { background: var(--green); }
.approve-action { width: 100%; justify-content: center; margin-top: 9px; color: white; border-color: var(--blue); background: var(--blue); }
.approve-action:disabled { cursor: not-allowed; opacity: .35; }

.features {
  padding-top: 40px;
  position: relative;
  isolation: isolate;
}
.features > * { position: relative; z-index: 1; }
.feature-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
.feature-card {
  min-height: 350px;
  position: relative;
  padding: 46px 44px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  background: rgba(255,255,255,.66);
}
.feature-card h3 {
  max-width: 540px;
  margin: 34px 0 18px;
  font-size: clamp(28px, 2.25vw, 36px);
  line-height: 1.14;
  letter-spacing: -.045em;
}
.feature-card p {
  max-width: 570px;
  margin: 0;
  color: #52647b;
  line-height: 1.9;
  font-size: 16px;
}
.feature-number {
  position: absolute;
  right: 28px;
  top: 24px;
  color: rgba(33,91,255,.2);
  font: 900 54px/1 monospace;
  letter-spacing: -.12em;
}
.feature-icon {
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
  color: var(--blue);
  border: 1px solid #99add0;
  border-radius: 50%;
  background: #f3f6ff;
  font-size: 28px;
}
.feature-wide { background: var(--ink); color: white; }
.feature-wide { border-color: #17263a; border-top-color: var(--green); }
.feature-wide h3 { color: #fff; }
.feature-wide p { color: #b8c7d9; }
.feature-wide .feature-number { color: rgba(255,255,255,.12); }
.protocols { display: flex; gap: 8px; margin-top: 28px; }
.protocols span { padding: 9px 14px; border: 1px solid #45566d; color: #e1e9f2; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.radio-icon { position: relative; border: none; }
.radio-icon i { position: absolute; border: 1px solid #628cff; border-radius: 50%; }
.radio-icon i:nth-child(1) { width: 12px; height: 12px; background: var(--blue); }
.radio-icon i:nth-child(2) { width: 31px; height: 31px; }
.radio-icon i:nth-child(3) { width: 51px; height: 51px; opacity: .5; }
.material-card { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 34px; }
.material-card h3 { margin-top: 0; }
.material-swatch { width: 140px; height: 210px; padding: 18px; display: flex; flex-direction: column; justify-content: space-between; background: linear-gradient(110deg,#566168,#e2e6e4 31%,#fafbf8 48%,#8d989c 75%,#4d575d); color: #202c38; }
.material-swatch i { width: 12px; height: 12px; border-radius: 50%; background: white; box-shadow: 0 0 0 5px rgba(255,255,255,.2); }
.material-swatch span { font: 700 8px/1.6 monospace; }
.material-swatch b { font-family: inherit; font-size: 10px; }
.sound-card { grid-column: 1 / -1; min-height: 290px; background: linear-gradient(120deg,rgba(255,255,255,.75),rgba(230,236,247,.72)); }
.sound-card h3 { margin-top: 28px; }
.sound-icon { font-size: 30px; font-weight: 900; }
.sound-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.sound-tags span { padding: 8px 12px; color: #41546e; border: 1px solid #b7c5d8; background: rgba(255,255,255,.65); font-size: 10px; font-weight: 800; letter-spacing: .08em; }

.system-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: center; border-top: 1px solid var(--line); }
.system-copy > p:last-child { color: var(--muted); line-height: 1.85; font-size: 14px; }
.system-flow { display: flex; flex-direction: column; }
.flow-node { min-height: 100px; display: grid; grid-template-columns: 40px 60px 1fr; align-items: center; padding: 16px; border: 1px solid var(--line); background: white; }
.flow-node > span { font: 700 10px monospace; color: #9aa5b2; }
.flow-node > i { width: 44px; height: 44px; display: grid; place-items: center; color: var(--blue); border-radius: 50%; background: #edf2ff; font-style: normal; font-size: 22px; }
.flow-node div { display: flex; flex-direction: column; gap: 6px; }
.flow-node b { font-size: 15px; }
.flow-node small { color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.flow-line { height: 54px; margin-left: 75px; border-left: 1px dashed #8fa0b4; position: relative; }
.flow-line i { position: absolute; left: 14px; top: 20px; color: #8b98a9; font-size: 9px; font-style: normal; }

.progress-section { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; padding-top: 40px; }
.timeline { border-top: 1px solid var(--line); }
.timeline-item { min-height: 86px; display: grid; grid-template-columns: 52px 1fr; align-items: center; border-bottom: 1px solid var(--line); color: #9aa4b1; }
.timeline-item i { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid #bdc5cf; border-radius: 50%; font: 700 9px monospace; font-style: normal; }
.timeline-item span { display: flex; flex-direction: column; gap: 5px; }
.timeline-item b { font-size: 14px; }
.timeline-item small { font-size: 11px; }
.timeline-item.complete { color: #3f4e61; }
.timeline-item.complete i { color: white; border-color: var(--green); background: #17b96a; }
.timeline-item.active { color: var(--ink); }
.timeline-item.active i { color: white; border-color: var(--blue); background: var(--blue); box-shadow: 0 0 0 6px rgba(33,91,255,.1); }

footer { min-height: 180px; padding: 0 max(24px, calc((100vw - 1240px)/2)); display: flex; align-items: center; justify-content: space-between; color: white; background: var(--ink); }
footer .brand-mark {
  padding: 3px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 5px;
  background: rgba(255,255,255,.035);
  box-shadow: 0 8px 18px rgba(0,0,0,.32), inset 0 1px 0 rgba(255,255,255,.08);
}
footer .brand-mark i {
  border: 1px solid rgba(255,255,255,.16);
  box-shadow: inset 0 1px 1px rgba(255,255,255,.3), inset 0 -2px 3px rgba(0,0,0,.16), 0 2px 4px rgba(0,0,0,.24);
}
footer .brand-mark i:first-child { background: linear-gradient(#31577f, #173451); }
footer .brand-mark i:nth-child(2) { background: linear-gradient(#ffd967, #e9ad22); }
footer .brand-mark i:nth-child(3) { background: linear-gradient(#70e8a2, #29b96d); }
footer .brand > span:last-child { text-shadow: 0 2px 7px rgba(0,0,0,.45); }
footer p { color: #a4b0bf; font-size: 13px; }
footer > span { color: #66758a; font: 700 9px monospace; letter-spacing: .12em; }

/* Apple-inspired restrained type scale: 12 / 14 / 17 / 28 / 48 / 64 */
.nav-links, .nav-cta { font-size: 12px; }
.eyebrow, .section-kicker { font-size: 12px; line-height: 1.35; }
.hero h1 { font-size: clamp(52px, 5vw, 64px); line-height: 1.12; letter-spacing: -.035em; }
.hero-lead { font-size: 17px; line-height: 1.65; }
.primary-button, .buy-button { font-size: 14px; }
.text-button { font-size: 14px; }
.hero-meta { font-size: 12px; }
.statement p { font-size: 17px; line-height: 1.5; }
.statement h2 { font-size: clamp(42px, 5vw, 64px); line-height: 1.16; }
.section-heading h2, .system-copy h2, .progress-section h2 {
  font-size: clamp(40px, 4.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -.025em;
}
.hero h1,
.statement h2,
.brand-origin-copy h2,
.section-heading h2,
.system-copy h2,
.progress-section h2 {
  text-wrap: balance;
  word-break: auto-phrase;
}
.brand-origin-copy h2 { letter-spacing: -.025em; }
.section-heading > p, .system-copy > p:last-child { font-size: 17px; line-height: 1.65; }
.feature-card h3 { font-size: 28px; line-height: 1.2; letter-spacing: -.035em; }
.feature-card p { font-size: 15px; line-height: 1.7; }
.current-state strong { font-size: 36px; }
.state-detail { font-size: 14px; line-height: 1.6; }
.state-buttons button, .approve-action { font-size: 13px; }
.flow-node b { font-size: 17px; }
.flow-node small, .timeline-item small { font-size: 12px; }
.timeline-item b { font-size: 17px; }
footer p { font-size: 14px; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 80px 0; }
  .hero-visual { min-height: 620px; }
  .section-heading, .system-section, .progress-section { grid-template-columns: 1fr; display: grid; gap: 30px; }
  .section-heading > p { width: auto; }
  .demo-shell { grid-template-columns: 1fr; }
  .simulator-embed { height: 820px; }
  .demo-stage { min-height: 600px; }
  .feature-grid { grid-template-columns: 1fr; }
  .brand-origin { grid-template-columns: 120px 1fr; gap: 34px; }
  .brand-origin-number { font-size: 72px; }
  .brand-origin-mark { display: none; }
  body::before { width: 280px; height: 430px; right: -70px; opacity: .14; }
}
@media (max-width: 560px) {
  .nav { width: calc(100% - 28px); }
  .nav-cta { display: none; }
  .hero, .brand-origin, .demo-section, .features, .system-section, .progress-section { width: calc(100% - 28px); }
  .product-edition { flex-wrap: wrap; }
  .brand-origin { padding: 64px 0; grid-template-columns: 1fr; gap: 22px; }
  .brand-origin-number { font-size: 64px; }
  .hero h1 { font-size: 46px; }
  .hero h1 > span { white-space: normal; }
  .hero-actions, .hero-meta { align-items: flex-start; flex-direction: column; }
  .hero-meta { gap: 12px; }
  .hero-visual { transform: scale(.88); margin: -40px -30px; }
  .demo-panel { padding: 30px 22px; }
  .state-buttons { grid-template-columns: 1fr; }
  .material-card { grid-template-columns: 1fr; gap: 25px; }
  .material-swatch { width: 100%; height: 120px; }
  footer { padding: 40px 24px; flex-direction: column; gap: 22px; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }
  .yellow-pulse,
  .state-thinking .yellow .tower-lens,
  .state-approval .red .tower-lens,
  .state-error .red .tower-lens,
  .state-done .green .tower-lens,
  .state-offline .red .tower-lens { animation: none !important; }
}