:root {
  --ink: #eefcff;
  --muted: #8ca0a6;
  --dim: #5d7177;
  --night: #071216;
  --night-2: #0b1b20;
  --panel: #10242a;
  --line: rgba(150, 220, 232, .16);
  --cyan: #25d7ef;
  --cyan-soft: #88eff9;
  --orange: #ffaf3f;
  --paper: #f2f0e9;
  --paper-ink: #101b1e;
  --max: 1280px;
  --header-height: 78px;
  --ease: cubic-bezier(.2, .75, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--night);
  font-family: "DM Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  color: #071216;
  background: #fff;
  transform: translateY(-150%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(22px, 4.2vw, 74px);
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease, height .35s ease;
}
.site-header.scrolled {
  height: 66px;
  background: rgba(7, 18, 22, .88);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -.03em;
}
.brand img { width: 36px; height: 36px; filter: drop-shadow(0 0 14px rgba(37, 215, 239, .2)); }
.site-nav { display: flex; align-items: center; gap: clamp(20px, 2.2vw, 38px); }
.site-nav a {
  position: relative;
  color: #b7c7ca;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .035em;
  transition: color .2s ease;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -7px;
  height: 1px;
  background: var(--cyan);
  transition: right .25s var(--ease);
}
.site-nav a:hover, .site-nav a.active { color: #fff; }
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }
.header-actions { justify-self: end; display: flex; gap: 10px; align-items: center; }
.language-toggle {
  min-width: 52px;
  height: 34px;
  padding: 0 12px;
  border: 0;
  color: #b9c9cc;
  background: transparent;
  cursor: pointer;
}
.language-toggle:hover { color: var(--cyan); }
.menu-button { display: none; }

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .035em;
  transition: transform .25s var(--ease), background .25s ease, border-color .25s ease, color .25s ease;
}
.button:hover { transform: translateY(-2px); }
.button-small { min-height: 37px; padding: 0 16px; font-size: 12px; }
.button-primary { color: #041317; background: var(--cyan); box-shadow: 0 16px 42px rgba(37, 215, 239, .12); }
.button-primary:hover { background: #8ef4ff; }
.button-outline { border-color: rgba(204, 242, 247, .28); background: rgba(10, 23, 27, .25); }
.button-outline:hover { border-color: var(--cyan); }
.button-light { color: var(--night); background: var(--paper); }
.button-ghost { border-color: rgba(210, 239, 243, .28); background: transparent; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  color: #d2e2e4;
  font-size: 13px;
  font-weight: 600;
  border-bottom: 1px solid rgba(210, 226, 228, .32);
  transition: color .2s ease, border-color .2s ease;
}
.text-link:hover { color: var(--cyan); border-color: var(--cyan); }
.text-link.dark { color: var(--paper-ink); border-color: rgba(16, 27, 30, .35); }

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(320px, .92fr) minmax(440px, 1.08fr);
  align-items: center;
  gap: clamp(42px, 7vw, 110px);
  padding: calc(var(--header-height) + 70px) max(6vw, calc((100vw - var(--max)) / 2)) 78px;
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 40%, rgba(25, 186, 204, .16), transparent 31%),
    radial-gradient(circle at 8% 86%, rgba(255, 175, 63, .07), transparent 25%),
    linear-gradient(140deg, #071216 0%, #08171b 58%, #061013 100%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: .42;
  background-image:
    linear-gradient(rgba(87, 158, 168, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 158, 168, .07) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: linear-gradient(to right, transparent 5%, #000 42%, transparent 100%);
}
.hero-orbit { position: absolute; border: 1px solid rgba(73, 200, 218, .1); border-radius: 50%; pointer-events: none; }
.hero-orbit-one { width: 900px; height: 900px; right: -300px; top: -260px; }
.hero-orbit-two { width: 620px; height: 620px; right: -20px; bottom: -410px; }
.hero-copy { position: relative; z-index: 2; max-width: 690px; }
.eyebrow, .kicker {
  margin: 0 0 24px;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: 10px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 6px rgba(37, 215, 239, .09); }
.hero h1 {
  margin: 0;
  max-width: 760px;
  font-family: "Space Grotesk", "PingFang SC", sans-serif;
  font-size: clamp(70px, 8.2vw, 132px);
  line-height: .85;
  letter-spacing: -.075em;
  font-weight: 600;
}
.hero h1 em { color: var(--cyan); font-style: normal; }
.hero-intro { max-width: 620px; margin: 42px 0 0; color: #9cb0b5; font-size: clamp(16px, 1.5vw, 20px); line-height: 1.7; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 38px; }
.hero-visual {
  position: relative;
  z-index: 1;
  width: min(47vw, 670px);
  aspect-ratio: 1;
  justify-self: center;
}
.visual-halo {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(55, 226, 241, .19) 0%, rgba(14, 106, 118, .08) 46%, transparent 69%);
  filter: blur(3px);
}
.mod-core {
  position: absolute;
  top: 50%; left: 50%;
  width: 37%; aspect-ratio: 1;
  display: grid;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(103, 238, 251, .28);
  border-radius: 50%;
  background: rgba(5, 17, 20, .7);
  box-shadow: 0 0 100px rgba(28, 205, 225, .16), inset 0 0 40px rgba(65, 218, 235, .06);
  backdrop-filter: blur(10px);
}
.mod-core::before, .mod-core::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(72, 220, 237, .16); }
.mod-core::before { inset: -34%; }
.mod-core::after { inset: -72%; border-style: dashed; animation: spin 44s linear infinite; }
.mod-core img { width: 68%; filter: drop-shadow(0 18px 30px rgba(0,0,0,.4)); }
.floating-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px 7px 8px;
  border: 1px solid rgba(138, 229, 239, .18);
  background: rgba(10, 26, 31, .86);
  box-shadow: 0 16px 40px rgba(0,0,0,.25);
  color: #dcebed;
  font-family: "Space Grotesk", sans-serif;
  font-size: 12px;
  backdrop-filter: blur(14px);
  animation: float 5.5s ease-in-out infinite;
}
.floating-chip img { width: 30px; height: 32px; object-fit: contain; image-rendering: pixelated; }
.chip-one { left: 1%; top: 27%; }
.chip-two { right: 0; top: 21%; animation-delay: -1s; }
.chip-three { left: 10%; bottom: 19%; animation-delay: -2.1s; }
.chip-four { right: 5%; bottom: 25%; animation-delay: -3.3s; }
.hud-card {
  position: absolute;
  min-width: 205px;
  padding: 13px 16px;
  border-left: 2px solid var(--cyan);
  background: rgba(7, 20, 24, .78);
  box-shadow: 0 18px 45px rgba(0,0,0,.2);
  backdrop-filter: blur(14px);
}
.hud-card span, .hud-card strong { display: block; }
.hud-kicker { color: var(--cyan); font-size: 9px; letter-spacing: .16em; }
.hud-card strong { margin-top: 4px; font-size: 13px; }
.hud-value { color: #869ca0; font-size: 11px; }
.hud-card-top { top: 6%; left: 28%; }
.hud-card-bottom { right: 23%; bottom: 4%; }
.hero-scroll { position: absolute; left: 50%; bottom: 24px; width: 18px; height: 36px; transform: translateX(-50%); border: 1px solid rgba(205,238,242,.3); border-radius: 12px; }
.hero-scroll span { position: absolute; top: 7px; left: 50%; width: 2px; height: 6px; background: var(--cyan); transform: translateX(-50%); animation: scroll 1.7s ease infinite; }

.section-light { color: var(--paper-ink); background: var(--paper); }
.statement, .feature-section, .shard-section, .maps-section, .safety-section, .faq-section, .download-section { position: relative; padding: clamp(92px, 11vw, 170px) max(6vw, calc((100vw - var(--max)) / 2)); }
.section-index { margin: 0 0 44px; color: #728186; font: 600 10px/1 "Space Grotesk", sans-serif; letter-spacing: .18em; }
.statement { min-height: 760px; }
.statement-inner { max-width: 950px; margin: 0 auto; text-align: center; }
.statement .kicker, .maps-section .kicker, .faq-section .kicker { color: #4e7479; }
.statement h2, .section-heading h2, .safety-copy h2, .download-section h2 {
  margin: 0;
  font-family: "Space Grotesk", "PingFang SC", sans-serif;
  font-size: clamp(46px, 6vw, 86px);
  line-height: .98;
  letter-spacing: -.065em;
}
.statement-inner > p:last-child { max-width: 800px; margin: 34px auto 0; color: #566568; font-size: clamp(17px, 1.5vw, 21px); }
.metric-grid { max-width: var(--max); margin: clamp(70px, 9vw, 125px) auto 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #c8ceca; border-bottom: 1px solid #c8ceca; }
.metric-grid article { min-height: 170px; display: flex; flex-direction: column; justify-content: center; padding: 30px; border-right: 1px solid #c8ceca; }
.metric-grid article:last-child { border-right: 0; }
.metric-grid strong { font: 600 clamp(38px, 4vw, 58px)/1 "Space Grotesk", sans-serif; letter-spacing: -.05em; }
.metric-grid span { max-width: 170px; margin-top: 14px; color: #677478; font-size: 12px; line-height: 1.45; }

.feature-section { background: linear-gradient(180deg, #071216, #09171b 70%, #071216); }
.section-heading { max-width: 880px; }
.section-heading h2 { max-width: 860px; }
.feature-story {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 4vw, 60px);
  border: 1px solid var(--line);
  background: #0c1c21;
}
.feature-story-wide { min-height: 620px; display: grid; grid-template-columns: minmax(330px, .85fr) minmax(500px, 1.15fr); gap: 7vw; align-items: center; margin-top: 80px; }
.feature-number { position: absolute; top: 22px; right: 28px; color: #4a6268; font: 600 11px/1 "Space Grotesk", sans-serif; }
.feature-tag { color: var(--cyan); font-size: 10px; font-weight: 700; letter-spacing: .17em; }
.feature-story h3 { margin: 20px 0 22px; font: 600 clamp(30px, 3.3vw, 50px)/1.05 "Space Grotesk", sans-serif; letter-spacing: -.045em; }
.feature-story p { color: #8fa4a9; }
.feature-list { margin: 28px 0 0; padding: 0; list-style: none; }
.feature-list li { position: relative; margin: 10px 0; padding-left: 22px; color: #c5d2d4; font-size: 13px; }
.feature-list li::before { content: "+"; position: absolute; left: 0; color: var(--cyan); }
.feature-pair { display: grid; grid-template-columns: 1fr 1fr; margin-top: 18px; gap: 18px; }
.feature-pair .feature-story { min-height: 590px; }
.feature-story-cyan { color: #041316; background: var(--cyan); }
.feature-story-cyan .feature-tag, .feature-story-cyan p { color: #13545e; }
.feature-story-cyan .feature-number { color: rgba(4,19,22,.38); }
.editor-mockup { width: 100%; min-height: 420px; border: 1px solid #2a4248; background: #101e22; box-shadow: 0 34px 70px rgba(0,0,0,.28); }
.mock-window-bar { height: 45px; display: flex; align-items: center; gap: 7px; padding: 0 16px; border-bottom: 1px solid #2a3c41; color: #778a8e; font-size: 10px; letter-spacing: .1em; }
.mock-window-bar i { width: 7px; height: 7px; border-radius: 50%; background: #33535a; }
.mock-window-bar i:first-child { background: var(--cyan); }
.mock-window-bar span { margin-left: auto; }
.mock-window-body { min-height: 374px; display: grid; grid-template-columns: 116px 1fr; }
.mock-window-body aside { padding: 23px 12px; border-right: 1px solid #26383d; background: #0b171a; }
.mock-window-body aside span { display: block; margin-bottom: 7px; padding: 9px 10px; color: #64777b; font-size: 10px; }
.mock-window-body aside .active { color: #fff; background: #183039; border-left: 2px solid var(--cyan); }
.mock-content { padding: 24px; }
.mock-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.mock-title span { font: 600 18px "Space Grotesk", sans-serif; }
.mock-title small { width: 100px; padding: 8px; border: 1px solid #30464c; color: #51676c; }
.mock-group { display: flex; justify-content: space-between; padding: 12px 14px; margin-bottom: 10px; border: 1px solid #2b3e43; font-size: 11px; }
.mock-group em { color: var(--cyan); font-style: normal; }
.mock-feature { display: flex; gap: 12px; align-items: center; min-height: 72px; margin-top: 8px; padding: 12px; border: 1px solid #23373c; }
.mock-feature > i { width: 3px; height: 34px; background: #375158; }
.mock-feature.active > i { background: var(--cyan); }
.mock-feature b, .mock-feature small { display: block; }
.mock-feature b { font-size: 12px; }
.mock-feature small { color: #63777b; font-size: 10px; }
.mini-hud { position: absolute; inset: auto 8% 8%; padding: 24px; border: 1px solid #31515a; background: rgba(5,16,19,.62); }
.mini-hud span, .mini-hud strong, .mini-hud small { display: block; }
.mini-hud span { color: var(--cyan); font-size: 9px; letter-spacing: .14em; }
.mini-hud strong { margin-top: 8px; }
.mini-hud div { height: 8px; margin-top: 15px; padding: 2px; background: #071013; }
.mini-hud div i { display: block; height: 100%; background: var(--cyan); }
.mini-hud small { margin-top: 5px; color: #81969a; }
.alert-demo { position: absolute; inset: auto 8% 8%; padding: 30px; border: 1px solid rgba(4,19,22,.25); text-align: center; }
.alert-demo span, .alert-demo strong, .alert-demo small { display: block; }
.alert-demo span { font-size: 9px; letter-spacing: .15em; }
.alert-demo strong { margin: 8px 0; font: 700 clamp(25px, 3vw, 42px) "Space Grotesk", sans-serif; }
.alert-demo small { color: #12606a; }

.shard-section { min-height: 930px; overflow: hidden; background: #050d10; }
.shard-section::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 77% 50%, rgba(55, 199, 218, .14), transparent 35%); }
.shard-backdrop { position: absolute; inset: 0; opacity: .055; pointer-events: none; }
.shard-backdrop img { position: absolute; width: 230px; image-rendering: pixelated; filter: grayscale(.2); }
.shard-backdrop img:nth-child(1) { left: -50px; top: 10%; transform: rotate(-12deg); }
.shard-backdrop img:nth-child(2) { left: 35%; bottom: -50px; transform: rotate(20deg); }
.shard-backdrop img:nth-child(3) { right: 1%; top: 5%; transform: rotate(15deg); }
.shard-backdrop img:nth-child(4) { left: 13%; bottom: 15%; }
.shard-backdrop img:nth-child(5) { right: 25%; bottom: 4%; transform: rotate(-20deg); }
.shard-backdrop img:nth-child(6) { right: -70px; bottom: 18%; }
.shard-layout { position: relative; z-index: 2; max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: .88fr 1.12fr; gap: clamp(50px, 8vw, 120px); align-items: center; }
.shard-layout .section-heading > p:not(.section-index,.kicker) { max-width: 590px; color: #83999e; font-size: 17px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.pill-row span { padding: 6px 11px; border: 1px solid #294047; color: #8ea5aa; font-size: 10px; letter-spacing: .06em; }
.fusion-demo { padding: clamp(24px, 3vw, 42px); border: 1px solid #29434b; background: rgba(12, 28, 33, .88); box-shadow: 0 40px 90px rgba(0,0,0,.3); backdrop-filter: blur(15px); }
.fusion-toolbar { display: flex; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid #2c4248; }
.fusion-toolbar span { font: 600 16px "Space Grotesk", sans-serif; }
.fusion-toolbar small { color: var(--cyan); font-size: 9px; letter-spacing: .14em; }
.fusion-target { display: flex; align-items: center; gap: 18px; margin: 25px 0; padding: 18px; background: #10262c; }
.fusion-target img, .fusion-tree img { object-fit: contain; image-rendering: pixelated; }
.fusion-target small, .fusion-target strong, .fusion-target span { display: block; }
.fusion-target small { color: #627b80; font-size: 8px; letter-spacing: .14em; }
.fusion-target strong { margin: 3px 0; color: #ff55ff; font: 600 20px "Space Grotesk", sans-serif; }
.fusion-target span { color: #778e93; font-size: 11px; }
.fusion-tree { padding: 30px; border: 1px solid #263e45; background: rgba(5,13,16,.44); }
.tree-output { width: max-content; max-width: 100%; display: flex; align-items: center; gap: 10px; margin: 0 auto; padding: 9px 15px; border: 1px solid #415f67; }
.tree-output img, .tree-inputs img { width: 32px; height: 34px; }
.tree-connector { width: 1px; height: 34px; margin: 0 auto; background: #3e626b; position: relative; }
.tree-connector::after { content: ""; position: absolute; top: 100%; left: 50%; width: min(230px, 25vw); height: 1px; background: #3e626b; transform: translateX(-50%); }
.tree-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 18px; }
.tree-inputs > div { display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 8px; padding: 10px 12px; border: 1px solid #2c464d; font-size: 11px; }
.tree-inputs b { color: var(--cyan); }
.fusion-summary { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 18px; border-top: 1px solid #263e45; border-bottom: 1px solid #263e45; }
.fusion-summary > span { padding: 14px; border-right: 1px solid #263e45; }
.fusion-summary > span:last-child { border: 0; }
.fusion-summary small, .fusion-summary b { display: block; }
.fusion-summary small { color: #5d7479; font-size: 8px; letter-spacing: .12em; }
.fusion-summary b { margin-top: 3px; font: 600 20px "Space Grotesk", sans-serif; }

.maps-section { overflow: hidden; }
.map-showcase { max-width: var(--max); margin: 75px auto 0; display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(45px, 7vw, 100px); align-items: center; }
.map-frame { position: relative; aspect-ratio: 1.15; overflow: hidden; background: #0b1518; box-shadow: 0 28px 70px rgba(22, 37, 39, .16); }
.map-frame > img { width: 100%; height: 100%; object-fit: cover; opacity: .9; filter: saturate(.9) contrast(1.02); }
.map-frame::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 90px rgba(0,0,0,.3); pointer-events: none; }
.map-marker { position: absolute; left: var(--marker-x, 52%); top: var(--marker-y, 42%); z-index: 3; width: 0; height: 0; border-left: 13px solid transparent; border-right: 13px solid transparent; border-bottom: 30px solid #ff3b32; filter: drop-shadow(0 3px 5px rgba(0,0,0,.6)); transform: rotate(116deg); animation: marker 4s ease-in-out infinite; transition: left .22s ease-out, top .22s ease-out; }
.map-caption { position: absolute; z-index: 4; left: 24px; right: 24px; bottom: 22px; display: flex; justify-content: space-between; align-items: center; padding: 13px 17px; color: #e8f3f3; background: rgba(5,16,19,.77); backdrop-filter: blur(10px); }
.map-caption span { font-weight: 700; }
.map-caption small { color: var(--cyan); font-size: 8px; letter-spacing: .14em; }
.map-copy > p { color: #56676a; font-size: clamp(17px, 1.65vw, 22px); }
.map-facts { display: grid; gap: 0; margin: 35px 0; border-top: 1px solid #c6cecb; }
.map-facts > div { display: grid; grid-template-columns: 90px 1fr; padding: 16px 0; border-bottom: 1px solid #c6cecb; }
.map-facts strong { font: 600 20px "Space Grotesk", sans-serif; }
.map-facts span { color: #647275; font-size: 13px; }

.safety-section { max-width: none; display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(55px, 9vw, 140px); align-items: start; background: var(--cyan); color: #041316; }
.safety-section .section-index, .safety-section .kicker { color: #16636d; }
.safety-copy > p:not(.section-index,.kicker) { max-width: 590px; margin: 30px 0 36px; color: #14535c; font-size: 18px; }
.safety-list { border-top: 1px solid rgba(4,19,22,.24); }
.safety-list article { display: grid; grid-template-columns: 48px 1fr; gap: 20px; padding: 27px 0; border-bottom: 1px solid rgba(4,19,22,.24); }
.safety-list article > span { font: 600 11px "Space Grotesk", sans-serif; }
.safety-list h3 { margin: 0; font: 600 clamp(21px, 2vw, 29px)/1.1 "Space Grotesk", sans-serif; letter-spacing: -.035em; }
.safety-list p { margin: 8px 0 0; color: #15616b; font-size: 13px; }

.faq-section .section-heading { margin: 0 auto; text-align: center; }
.faq-list { max-width: 930px; margin: 70px auto 0; border-top: 1px solid #c7cfcc; }
.faq-list details { border-bottom: 1px solid #c7cfcc; }
.faq-list summary { min-height: 90px; display: flex; justify-content: space-between; align-items: center; gap: 30px; list-style: none; cursor: pointer; font: 600 clamp(17px, 1.5vw, 21px) "Space Grotesk", sans-serif; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { position: relative; flex: 0 0 18px; height: 18px; }
.faq-list summary i::before, .faq-list summary i::after { content: ""; position: absolute; top: 50%; left: 0; width: 100%; height: 1px; background: #24363a; transition: transform .25s ease; }
.faq-list summary i::after { transform: rotate(90deg); }
.faq-list details[open] summary i::after { transform: rotate(0); }
.faq-list details p { margin: -7px 60px 28px 0; color: #5e6d70; }
.faq-list details p a { color: #167d8a; text-decoration: underline; text-underline-offset: 3px; }

.download-section { min-height: 760px; display: flex; flex-direction: column; justify-content: center; align-items: center; overflow: hidden; text-align: center; background: #071216; }
.download-glow { position: absolute; width: 750px; height: 750px; border-radius: 50%; background: radial-gradient(circle, rgba(37,215,239,.13), transparent 65%); }
.download-icon { position: relative; z-index: 1; filter: drop-shadow(0 20px 34px rgba(0,0,0,.4)); }
.download-section .kicker, .download-section h2, .download-section > p, .download-actions { position: relative; z-index: 1; }
.download-section .kicker { margin-top: 34px; }
.download-section h2 { max-width: 900px; }
.download-section > p { max-width: 670px; margin: 28px auto 0; color: #879ca1; font-size: 17px; }
.download-actions { display: flex; gap: 12px; margin-top: 38px; }

.site-footer { display: grid; grid-template-columns: 1fr 1.4fr auto auto; gap: 38px; align-items: center; padding: 35px max(6vw, calc((100vw - var(--max)) / 2)); border-top: 1px solid var(--line); background: #050c0f; color: #72868a; font-size: 11px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #dbe8ea; font-family: "Space Grotesk", sans-serif; font-weight: 700; }
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--cyan); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal[data-delay="1"] { transition-delay: .12s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes scroll { 0% { opacity: 0; transform: translate(-50%, 0); } 35% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%, 12px); } }
@keyframes marker { 0%,100% { translate: 0 0; } 50% { translate: 7px -5px; } }

@media (max-width: 1080px) {
  :root { --header-height: 70px; }
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { position: fixed; inset: var(--header-height) 0 0; display: flex; flex-direction: column; align-items: flex-start; gap: 0; padding: 50px 7vw; background: rgba(6,16,19,.98); transform: translateX(100%); transition: transform .35s var(--ease); }
  .site-nav.open { transform: translateX(0); }
  .site-nav a { width: 100%; padding: 16px 0; border-bottom: 1px solid var(--line); font: 600 clamp(26px, 6vw, 46px) "Space Grotesk", sans-serif; }
  .site-nav a::after { display: none; }
  .header-actions { margin-right: 52px; }
  .menu-button { position: absolute; right: 24px; display: grid; place-content: center; gap: 6px; width: 40px; height: 40px; padding: 0; border: 0; background: transparent; cursor: pointer; }
  .menu-button span { width: 22px; height: 1px; background: #dff2f4; transition: transform .25s ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { grid-template-columns: 1fr 1fr; padding-left: 6vw; padding-right: 6vw; }
  .hero-visual { width: min(48vw, 590px); }
  .feature-story-wide { grid-template-columns: 1fr; }
  .editor-mockup { min-height: 390px; }
  .shard-layout { grid-template-columns: 1fr; }
  .fusion-demo { max-width: 750px; width: 100%; margin: 0 auto; }
  .shard-section { min-height: 0; }
  .site-footer { grid-template-columns: 1fr auto; }
  .site-footer > p { grid-column: 1 / -1; grid-row: 2; }
}

@media (max-width: 780px) {
  .site-header { padding: 0 20px; }
  .header-actions .button { display: none; }
  .header-actions { margin-right: 42px; }
  .brand span { font-size: 14px; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 65px; padding: 138px 22px 90px; }
  .hero h1 { font-size: clamp(62px, 20vw, 94px); }
  .hero-intro { margin-top: 30px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .hero-visual { width: min(92vw, 580px); margin: 0 auto; }
  .hud-card { min-width: 170px; padding: 10px 12px; }
  .hud-card-bottom { right: 6%; }
  .hero-scroll { display: none; }
  .statement, .feature-section, .shard-section, .maps-section, .safety-section, .faq-section, .download-section { padding-left: 22px; padding-right: 22px; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .metric-grid article:nth-child(2) { border-right: 0; }
  .metric-grid article:nth-child(-n+2) { border-bottom: 1px solid #c8ceca; }
  .feature-pair, .map-showcase, .safety-section { grid-template-columns: 1fr; }
  .feature-pair .feature-story { min-height: 530px; }
  .feature-story-wide { margin-top: 55px; }
  .mock-window-body { grid-template-columns: 84px 1fr; }
  .mock-window-body aside span { padding: 8px 5px; }
  .mock-content { padding: 16px; }
  .mock-title small { display: none; }
  .map-showcase { margin-top: 45px; }
  .map-caption { left: 12px; right: 12px; bottom: 12px; }
  .safety-section { display: block; }
  .safety-list { margin-top: 70px; }
  .download-section { min-height: 660px; }
  .site-footer { display: flex; flex-wrap: wrap; align-items: flex-start; padding: 30px 22px; }
  .site-footer > p { width: 100%; order: 3; }
  .site-footer small { margin-left: auto; }
}

@media (max-width: 500px) {
  .language-toggle { min-width: 44px; padding: 0 8px; }
  .hero h1 { letter-spacing: -.065em; }
  .eyebrow { font-size: 9px; letter-spacing: .12em; }
  .hero-visual { min-height: 390px; aspect-ratio: auto; }
  .mod-core { width: 42%; }
  .mod-core::after { inset: -50%; }
  .floating-chip { font-size: 9px; padding: 5px 8px 5px 5px; }
  .floating-chip img { width: 24px; height: 26px; }
  .chip-one { left: 0; top: 22%; }
  .chip-two { right: 0; top: 26%; }
  .chip-three { left: 2%; bottom: 17%; }
  .chip-four { right: 0; bottom: 19%; }
  .hud-card-top { left: 20%; top: 1%; }
  .hud-card-bottom { right: 15%; bottom: 1%; }
  .statement h2, .section-heading h2, .safety-copy h2, .download-section h2 { font-size: clamp(40px, 13vw, 58px); }
  .metric-grid { grid-template-columns: 1fr; }
  .metric-grid article { min-height: 130px; border-right: 0; border-bottom: 1px solid #c8ceca; }
  .metric-grid article:last-child { border-bottom: 0; }
  .feature-story { padding: 28px 22px; }
  .feature-story h3 { font-size: 31px; }
  .feature-story-wide { display: block; }
  .editor-mockup { margin-top: 50px; min-height: 345px; overflow: hidden; }
  .mock-window-body { grid-template-columns: 1fr; }
  .mock-window-body aside { display: none; }
  .tree-inputs { grid-template-columns: 1fr; gap: 10px; }
  .tree-connector::after { display: none; }
  .fusion-demo { padding: 18px; }
  .fusion-target { padding: 13px; }
  .fusion-tree { padding: 18px; }
  .fusion-summary small { letter-spacing: .05em; }
  .map-frame { aspect-ratio: .92; }
  .map-frame > img { object-fit: cover; }
  .map-caption { display: block; }
  .map-caption small { display: block; margin-top: 3px; }
  .download-actions { width: 100%; flex-direction: column; }
  .download-actions .button { width: 100%; }
  .footer-links { width: 100%; order: 2; }
  .site-footer small { margin-left: 0; order: 4; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}