:root {
  --hive-amber: #f5b82e;
  --hive-amber-hot: #ffc63f;
  --signal-teal: #20c7a6;
  --graphite-shell: #171a1f;
  --carbon: #090b0e;
  --carbon-raised: #11151a;
  --cloud-white: #f7f8fa;
  --warm-paper: #f2efe8;
  --metal-silver: #b7bcc4;
  --pcb-green: #0f4a32;
  --ink: #171a1f;
  --ink-secondary: #5a6068;
  --ink-tertiary: #7a818a;
  --line-dark: rgba(247, 248, 250, .12);
  --line-light: rgba(23, 26, 31, .12);
  --font-display: "DengXian", "Microsoft YaHei UI", sans-serif;
  --font-body: "Microsoft YaHei UI", "DengXian", sans-serif;
  --font-data: "Bahnschrift", "Aptos", sans-serif;
  --ease: cubic-bezier(.25, 1, .5, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--carbon); color: var(--cloud-white); font-family: var(--font-body); -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
img { max-width: 100%; }
.site-shell { width: min(1240px, calc(100% - 80px)); margin: 0 auto; }
.display { margin: 0; font-family: var(--font-display); font-weight: 700; letter-spacing: -.055em; line-height: 1.03; }
.data-text { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
.amber { color: var(--hive-amber); }
.teal { color: var(--signal-teal); }
.muted { color: var(--ink-tertiary); }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 22px;
  color: var(--hive-amber);
  font: 600 12px/1 var(--font-data);
  letter-spacing: .2em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 32px; height: 1px; background: currentColor; }

/* Header */
.site-header { position: absolute; z-index: 100; inset: 0 0 auto; height: 92px; border-bottom: 1px solid rgba(255,255,255,.08); background: linear-gradient(180deg, rgba(7,8,10,.86), rgba(7,8,10,.12)); }
.site-header .site-shell { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.site-logo { width: 158px; display: block; }
.site-nav { display: flex; align-items: center; gap: 29px; color: #d9dce1; font-size: 14px; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: #fff; }
.nav-cta { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px; border: 1px solid rgba(245,184,46,.62); border-radius: 6px; color: #fff; }
.nav-cta i { width: 7px; height: 7px; border-radius: 50%; background: var(--hive-amber); box-shadow: 0 0 15px rgba(245,184,46,.65); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line-dark); border-radius: 6px; color: #fff; background: transparent; }

/* Shared controls */
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.primary-link, .secondary-link {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  padding: 0 24px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 650;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}
.primary-link { background: var(--hive-amber); color: #17130a; border: 1px solid var(--hive-amber); }
.primary-link::after { content: "↗"; font-family: var(--font-data); }
.secondary-link { border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.03); color: #eef0f2; }
.primary-link:hover, .secondary-link:hover { transform: translateY(-2px); }
.text-link { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 14px; font-weight: 650; }
.text-link::after { content: "→"; color: var(--hive-amber); transition: transform 200ms var(--ease); }
.text-link:hover::after { transform: translateX(5px); }

/* Inner hero */
.inner-hero { position: relative; min-height: 780px; overflow: hidden; background: #090b0e; }
.inner-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(90deg, #090b0e 0%, rgba(9,11,14,.94) 38%, rgba(9,11,14,.32) 74%, rgba(9,11,14,.55) 100%),
    linear-gradient(0deg, #090b0e 0%, transparent 24%);
}
.inner-hero::after {
  content: attr(data-index);
  position: absolute;
  z-index: 3;
  right: 3vw;
  bottom: 20px;
  color: rgba(255,255,255,.035);
  font: 700 250px/.8 var(--font-data);
  letter-spacing: -.08em;
}
.inner-hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .78; }
.inner-hero-pattern { position: absolute; inset: 0; opacity: .17; background-image: linear-gradient(30deg, transparent 49.7%, rgba(245,184,46,.3) 49.85% 50.15%, transparent 50.3%), linear-gradient(-30deg, transparent 49.7%, rgba(245,184,46,.18) 49.85% 50.15%, transparent 50.3%); background-size: 86px 50px; }
.inner-hero .site-shell { position: relative; z-index: 5; min-height: 780px; display: flex; align-items: center; padding-top: 70px; }
.inner-hero-copy { width: 660px; }
.inner-hero h1 { font-size: clamp(58px, 6vw, 86px); }
.inner-lead { max-width: 620px; margin: 30px 0 0; color: #adb3bc; font-size: 18px; line-height: 1.9; }
.hero-factline { display: flex; gap: 36px; margin-top: 50px; padding-top: 22px; border-top: 1px solid var(--line-dark); }
.hero-factline div { padding-right: 36px; border-right: 1px solid var(--line-dark); }
.hero-factline div:last-child { border: 0; }
.hero-factline strong { display: block; color: #fff; font: 650 23px/1 var(--font-data); }
.hero-factline span { display: block; margin-top: 9px; color: #737b85; font-size: 11px; letter-spacing: .08em; }

/* Sections */
.section { position: relative; padding: 124px 0 132px; overflow: hidden; }
.section-light { background: var(--warm-paper); color: var(--ink); }
.section-white { background: var(--cloud-white); color: var(--ink); }
.section-dark { background: var(--graphite-shell); color: #f5f6f7; }
.section-black { background: var(--carbon); color: #f5f6f7; }
.section-amber { background: var(--hive-amber); color: #17130a; }
.section-heading { display: grid; grid-template-columns: 1fr .82fr; gap: 80px; align-items: end; }
.section-heading h2 { font-size: clamp(46px, 5vw, 66px); }
.section-heading p { margin: 0; color: var(--ink-secondary); font-size: 16px; line-height: 1.9; }
.section-dark .section-heading p, .section-black .section-heading p { color: #8e959f; }
.section-label { color: #9c7418; font: 600 11px/1 var(--font-data); letter-spacing: .18em; text-transform: uppercase; }
.section-rule { height: 1px; background: var(--line-light); margin: 64px 0; }
.section-dark .section-rule, .section-black .section-rule { background: var(--line-dark); }

/* Platform */
.architecture { position: relative; margin-top: 74px; display: grid; grid-template-columns: 1fr 210px 1fr; gap: 55px; align-items: center; min-height: 460px; }
.architecture::before { content: ""; position: absolute; left: 17%; right: 17%; top: 50%; height: 1px; background: linear-gradient(90deg, var(--hive-amber), rgba(245,184,46,.18) 46%, rgba(32,199,166,.18) 54%, var(--signal-teal)); }
.source-stack, .destination-stack { position: relative; z-index: 2; display: grid; gap: 18px; }
.architecture-node { display: flex; align-items: center; justify-content: space-between; min-height: 92px; padding: 20px 22px; border: 1px solid var(--line-light); background: rgba(255,255,255,.55); }
.architecture-node b { font-size: 16px; }
.architecture-node span { color: #777d84; font: 500 10px/1 var(--font-data); letter-spacing: .12em; }
.destination-stack .architecture-node { border-left: 2px solid var(--signal-teal); }
.source-stack .architecture-node { border-right: 2px solid var(--hive-amber); }
.architecture-core { position: relative; z-index: 3; height: 210px; display: grid; place-items: center; background: var(--graphite-shell); clip-path: polygon(25% 6.7%,75% 6.7%,100% 50%,75% 93.3%,25% 93.3%,0 50%); }
.architecture-core img { width: 118px; }
.architecture-core small { position: absolute; bottom: 38px; font: 500 9px/1 var(--font-data); letter-spacing: .2em; color: #727a84; }
.evidence-band { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); margin-top: 72px; }
.evidence { padding: 34px; border-right: 1px solid var(--line-light); }
.evidence:first-child { padding-left: 0; }
.evidence:last-child { border: 0; }
.evidence strong { display: block; font: 650 36px/1 var(--font-data); letter-spacing: -.04em; }
.evidence span { display: block; margin-top: 12px; color: var(--ink-secondary); font-size: 12px; line-height: 1.6; }
.platform-steps { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 72px; border-top: 1px solid var(--line-dark); }
.platform-step { min-height: 300px; padding: 34px 34px 20px; border-right: 1px solid var(--line-dark); }
.platform-step:first-child { padding-left: 0; }
.platform-step:last-child { border: 0; }
.platform-step em { color: var(--hive-amber); font: normal 600 11px/1 var(--font-data); letter-spacing: .16em; }
.platform-step h3 { margin: 80px 0 17px; font-size: 25px; }
.platform-step p { margin: 0; color: #858c95; font-size: 14px; line-height: 1.85; }

/* Product */
.product-hero-media { object-position: center; }
.product-stage { position: relative; margin-top: 72px; min-height: 680px; border: 1px solid var(--line-light); background: #f8f7f4; overflow: hidden; }
.product-stage img { width: 100%; height: 100%; min-height: 680px; object-fit: cover; }
.product-callout { position: absolute; left: 28px; top: 28px; padding: 14px 16px; color: #fff; background: rgba(23,26,31,.92); border-radius: 5px; font-size: 12px; }
.spec-board { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 28px; border-top: 1px solid var(--line-light); }
.spec-card { padding: 30px 28px; border-right: 1px solid var(--line-light); }
.spec-card:last-child { border: 0; }
.spec-card .model-name { font: 650 23px/1 var(--font-data); }
.spec-list { list-style: none; padding: 0; margin: 24px 0 0; }
.spec-list li { display: flex; justify-content: space-between; gap: 20px; padding: 11px 0; border-top: 1px solid rgba(23,26,31,.08); font-size: 12px; }
.spec-list li span:first-child { color: var(--ink-tertiary); }
.spec-status { display: inline-flex; align-items: center; gap: 7px; margin-top: 20px; color: #0b826e; font: 600 10px/1 var(--font-data); letter-spacing: .08em; }
.spec-status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--signal-teal); }
.comparison { width: 100%; margin-top: 64px; border-collapse: collapse; font-size: 14px; }
.comparison th, .comparison td { padding: 20px 16px; text-align: left; border-bottom: 1px solid var(--line-light); }
.comparison th { color: #727982; font: 600 11px/1 var(--font-data); letter-spacing: .1em; }
.comparison td:first-child { font-weight: 650; }
.warning-band { display: grid; grid-template-columns: 180px 1fr; gap: 30px; margin-top: 48px; padding: 28px 30px; border-left: 3px solid var(--hive-amber); background: rgba(245,184,46,.08); }
.warning-band b { font: 600 12px/1.4 var(--font-data); letter-spacing: .12em; }
.warning-band p { margin: 0; color: var(--ink-secondary); line-height: 1.8; }

/* Channels */
.channel-ledger { margin-top: 72px; border-top: 1px solid var(--line-light); }
.channel-row { display: grid; grid-template-columns: 70px 1.15fr 1fr 160px; gap: 30px; align-items: center; min-height: 126px; border-bottom: 1px solid var(--line-light); transition: background 220ms var(--ease), padding 220ms var(--ease); }
.channel-row:hover { background: rgba(245,184,46,.045); padding: 0 18px; }
.channel-index { color: #9c7418; font: 600 11px/1 var(--font-data); letter-spacing: .12em; }
.channel-name { font-size: 22px; font-weight: 650; }
.channel-use { color: var(--ink-secondary); font-size: 13px; line-height: 1.7; }
.channel-state { justify-self: end; display: inline-flex; align-items: center; gap: 8px; color: #087e6b; font: 600 10px/1 var(--font-data); letter-spacing: .1em; }
.channel-state::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--signal-teal); }
.channel-state.recheck { color: #9b7219; }
.channel-state.recheck::before { background: var(--hive-amber); }
.featured-channel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: center; margin-top: 70px; }
.featured-copy h3 { margin: 20px 0; font-size: 43px; }
.featured-copy p { color: #8b929c; line-height: 1.9; }
.message-demo { position: relative; min-height: 480px; padding: 36px; border: 1px solid var(--line-dark); background: #0c0f13; }
.message-demo::before { content: "FEISHU ROUTE / 01"; color: #66707a; font: 600 10px/1 var(--font-data); letter-spacing: .18em; }
.message-bubble { margin: 88px 0 0 auto; width: 82%; padding: 24px; border-left: 2px solid var(--signal-teal); background: #151a20; }
.message-bubble strong { display: block; }
.message-bubble code { display: inline-block; margin-top: 18px; color: var(--hive-amber); font: 650 30px/1 var(--font-data); letter-spacing: .16em; }
.message-bubble span { display: block; margin-top: 16px; color: #737c85; font-size: 12px; }
.route-status { position: absolute; left: 36px; bottom: 36px; display: flex; align-items: center; gap: 9px; color: var(--signal-teal); font: 600 10px/1 var(--font-data); letter-spacing: .12em; }
.route-status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--signal-teal); box-shadow: 0 0 16px rgba(32,199,166,.6); }

/* Solutions */
.persona-switch { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 70px; border-top: 1px solid var(--line-light); }
.persona { min-height: 350px; padding: 35px 34px; border-right: 1px solid var(--line-light); }
.persona:first-child { padding-left: 0; }
.persona:last-child { border: 0; }
.persona span { color: #9c7418; font: 600 11px/1 var(--font-data); letter-spacing: .14em; }
.persona h3 { margin: 90px 0 18px; font-size: 26px; }
.persona p { color: var(--ink-secondary); font-size: 14px; line-height: 1.85; }
.solution-journey { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 74px; border-top: 1px solid var(--line-dark); }
.solution-journey::before { content: ""; position: absolute; top: -1px; left: 0; width: 25%; height: 2px; background: var(--hive-amber); }
.journey-step { min-height: 310px; padding: 32px; border-right: 1px solid var(--line-dark); }
.journey-step:first-child { padding-left: 0; }
.journey-step:last-child { border: 0; }
.journey-step b { color: #747c85; font: 600 10px/1 var(--font-data); letter-spacing: .14em; }
.journey-step h3 { margin: 72px 0 17px; font-size: 23px; }
.journey-step p { margin: 0; color: #838b95; font-size: 13px; line-height: 1.8; }
.result-line { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 56px; border: 1px solid var(--line-light); background: #fff; }
.result-line div { padding: 30px; border-right: 1px solid var(--line-light); }
.result-line div:last-child { border: 0; }
.result-line strong { display: block; font-size: 18px; }
.result-line span { display: block; margin-top: 10px; color: var(--ink-tertiary); font-size: 12px; line-height: 1.7; }

/* Security */
.security-manifesto { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; margin-top: 74px; }
.security-principle { min-height: 360px; padding: 38px; border: 1px solid var(--line-light); background: rgba(255,255,255,.52); }
.security-principle b { color: #9c7418; font: 600 11px/1 var(--font-data); letter-spacing: .14em; }
.security-principle h3 { margin: 96px 0 18px; font-size: 30px; }
.security-principle p { color: var(--ink-secondary); line-height: 1.85; }
.boundary-list { margin-top: 65px; border-top: 1px solid var(--line-dark); }
.boundary-row { display: grid; grid-template-columns: 70px 1fr 1fr; gap: 30px; padding: 30px 0; border-bottom: 1px solid var(--line-dark); }
.boundary-row .no { color: var(--hive-amber); font: 600 11px/1 var(--font-data); }
.boundary-row strong { font-size: 18px; }
.boundary-row p { margin: 0; color: #828a94; font-size: 13px; line-height: 1.8; }
.security-note { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 65px; }
.security-note blockquote { margin: 0; font-family: var(--font-display); font-size: 36px; font-weight: 700; line-height: 1.3; letter-spacing: -.03em; }
.security-note p { margin: 0; color: var(--ink-secondary); line-height: 1.9; }

/* Brand story */
.story-opening { min-height: 860px; display: grid; place-items: center; text-align: center; background: var(--hive-amber); color: #17130a; position: relative; overflow: hidden; }
.story-opening::before { content: ""; position: absolute; width: 620px; height: 620px; border: 1px solid rgba(23,19,10,.12); border-radius: 50%; }
.story-opening::after { content: ""; position: absolute; width: 410px; height: 410px; clip-path: polygon(25% 6.7%,75% 6.7%,100% 50%,75% 93.3%,25% 93.3%,0 50%); background: rgba(23,19,10,.035); }
.story-opening .site-shell { position: relative; z-index: 2; }
.story-opening img { width: 126px; margin-bottom: 36px; }
.story-opening h1 { max-width: 950px; margin: 0 auto; font-size: clamp(62px,7vw,100px); }
.story-opening p { max-width: 690px; margin: 30px auto 0; color: rgba(23,19,10,.68); font-size: 18px; line-height: 1.9; }
.story-chapter { display: grid; grid-template-columns: 180px 1fr; gap: 70px; padding: 70px 0; border-top: 1px solid var(--line-light); }
.story-chapter .chapter-index { color: #9d751a; font: 600 11px/1 var(--font-data); letter-spacing: .16em; }
.story-chapter h2 { margin: 0 0 28px; font-size: 44px; }
.story-chapter p { max-width: 760px; margin: 0 0 20px; color: var(--ink-secondary); font-size: 17px; line-height: 2; }
.name-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 55px; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.name-unit { padding: 36px; border-right: 1px solid var(--line-light); }
.name-unit:last-child { border: 0; }
.name-unit strong { display: block; font: 700 54px/1 var(--font-display); }
.name-unit span { display: block; margin-top: 22px; color: var(--ink-secondary); font-size: 13px; line-height: 1.8; }
.logo-meaning { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: center; }
.logo-plate { min-height: 480px; display: grid; place-items: center; background: var(--graphite-shell); }
.logo-plate img { width: 280px; }
.meaning-list { list-style: none; margin: 0; padding: 0; }
.meaning-list li { padding: 21px 0; border-bottom: 1px solid var(--line-light); }
.meaning-list b { display: block; font-size: 16px; }
.meaning-list span { display: block; margin-top: 8px; color: var(--ink-secondary); font-size: 13px; line-height: 1.7; }

/* Demo */
.demo-hero { min-height: 590px; }
.demo-hero .site-shell { min-height: 590px; }
.demo-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; align-items: start; }
.demo-aside { position: sticky; top: 40px; }
.demo-aside h2 { font-size: 44px; }
.demo-aside p { color: var(--ink-secondary); line-height: 1.85; }
.demo-checks { list-style: none; margin: 34px 0 0; padding: 0; }
.demo-checks li { position: relative; padding: 16px 0 16px 28px; border-bottom: 1px solid var(--line-light); color: var(--ink-secondary); font-size: 13px; }
.demo-checks li::before { content: ""; position: absolute; left: 0; top: 21px; width: 8px; height: 8px; border-radius: 50%; background: var(--signal-teal); }
.demo-form { padding: 46px; border: 1px solid var(--line-light); background: #fff; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.field { display: grid; gap: 9px; }
.field.full { grid-column: 1 / -1; }
.field label { color: #42474f; font-size: 13px; font-weight: 650; }
.field input, .field textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid rgba(23,26,31,.18);
  border-radius: 6px;
  color: var(--ink);
  background: #fbfbfa;
  outline: 0;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--hive-amber); box-shadow: 0 0 0 3px rgba(245,184,46,.15); }
.choice-row { display: flex; flex-wrap: wrap; gap: 10px; }
.choice { display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 0 14px; border: 1px solid var(--line-light); border-radius: 6px; color: #555c64; background: #fff; cursor: pointer; }
.choice input { accent-color: var(--hive-amber); }
.privacy-note { grid-column: 1 / -1; padding: 18px 20px; border-left: 3px solid var(--hive-amber); background: rgba(245,184,46,.08); color: #666c73; font-size: 12px; line-height: 1.7; }
.submit-row { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; margin-top: 8px; }
.submit-row button { border: 0; cursor: pointer; }
.submit-row span { color: var(--ink-tertiary); font-size: 11px; }

/* CTA and footer */
.site-cta { min-height: 600px; display: grid; place-items: center; text-align: center; position: relative; overflow: hidden; background: #090b0e; }
.site-cta::before { content: ""; position: absolute; width: 650px; height: 650px; border: 1px solid rgba(245,184,46,.11); border-radius: 50%; }
.site-cta::after { content: ""; position: absolute; width: 420px; height: 420px; clip-path: polygon(25% 6.7%,75% 6.7%,100% 50%,75% 93.3%,25% 93.3%,0 50%); background: rgba(245,184,46,.025); }
.site-cta-inner { position: relative; z-index: 2; max-width: 820px; }
.site-cta img { width: 110px; margin-bottom: 30px; }
.site-cta h2 { font-size: 58px; }
.site-cta p { max-width: 620px; margin: 24px auto 34px; color: #8d949e; line-height: 1.85; }
.site-footer { padding: 56px 0 32px; background: #07090b; border-top: 1px solid var(--line-dark); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, .75fr); gap: 38px; }
.footer-brand img { width: 150px; }
.footer-brand p { max-width: 300px; margin: 22px 0 0; color: #747b84; font-size: 12px; line-height: 1.75; }
.footer-column b { display: block; color: #dfe2e5; font-size: 12px; }
.footer-column a { display: block; margin-top: 15px; color: #6f7780; font-size: 12px; }
.footer-column a:hover { color: var(--hive-amber); }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 50px; padding-top: 24px; border-top: 1px solid var(--line-dark); color: #5e656e; font-size: 11px; }

@media (max-width: 980px) {
  .site-shell { width: min(100% - 40px, 760px); }
  .site-nav {
    display: none;
    position: fixed;
    z-index: 110;
    inset: 92px 0 0;
    padding: 24px max(28px, calc((100vw - 760px) / 2));
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    background-color: #080a0d;
    background-image:
      radial-gradient(circle at 30px 31px, rgba(245,184,46,.95) 0 2px, transparent 3px),
      linear-gradient(90deg, transparent 29px, rgba(245,184,46,.16) 30px, transparent 31px);
    box-shadow: inset 0 1px rgba(247,248,250,.08);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a {
    min-height: 64px;
    display: flex;
    align-items: center;
    padding: 0 14px 0 30px;
    border-bottom: 1px solid rgba(247,248,250,.09);
    font-size: 18px;
  }
  .site-nav .nav-cta { justify-content: center; margin: 18px 0 0 30px; border: 1px solid rgba(245,184,46,.68); }
  body.menu-open .site-header { position: fixed; background: #080a0d; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .section-heading, .featured-channel, .security-manifesto, .security-note, .logo-meaning, .demo-layout { grid-template-columns: 1fr; gap: 42px; }
  .architecture { grid-template-columns: 1fr; }
  .architecture::before { left: 50%; top: 12%; bottom: 12%; width: 1px; height: auto; background: linear-gradient(var(--hive-amber), var(--signal-teal)); }
  .architecture-core { width: 210px; margin: 0 auto; }
  .evidence-band, .spec-board, .persona-switch, .solution-journey, .result-line { grid-template-columns: 1fr 1fr; }
  .channel-row { grid-template-columns: 50px 1fr 140px; }
  .channel-use { display: none; }
  .story-chapter { grid-template-columns: 1fr; gap: 22px; }
  .name-grid { grid-template-columns: 1fr; }
  .name-unit { border-right: 0; border-bottom: 1px solid var(--line-light); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .site-shell { width: calc(100% - 36px); }
  .site-header { height: 76px; }
  .site-logo { width: 134px; }
  .site-nav { top: 76px; }
  .inner-hero, .inner-hero .site-shell { min-height: 720px; }
  .inner-hero h1 { font-size: 50px; }
  .inner-hero::before { background: linear-gradient(90deg, rgba(9,11,14,.98), rgba(9,11,14,.68)); }
  .inner-hero-media { object-position: 82% center; opacity: .48; }
  .hero-factline { gap: 18px; }
  .hero-factline div { padding-right: 18px; }
  .section { padding: 82px 0 90px; }
  .section-heading h2 { font-size: 43px; }
  .evidence-band, .spec-board, .persona-switch, .solution-journey, .result-line, .platform-steps, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .evidence, .spec-card, .persona, .journey-step, .platform-step { border-right: 0; border-bottom: 1px solid var(--line-light); padding-left: 0; }
  .channel-row { grid-template-columns: 42px 1fr; gap: 12px; }
  .channel-state { grid-column: 2; justify-self: start; padding-bottom: 18px; }
  .product-stage, .product-stage img { min-height: 420px; }
  .warning-band, .boundary-row { grid-template-columns: 1fr; }
  .story-opening { min-height: 760px; }
  .story-opening h1 { font-size: 54px; }
  .demo-form { padding: 24px 20px; }
  .submit-row { align-items: flex-start; flex-direction: column; gap: 16px; }
  .site-cta h2 { font-size: 44px; }
  .footer-bottom { flex-direction: column; gap: 12px; }
}

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