@font-face {
  font-family: "Smiley Sans";
  src: url("./fonts/SmileySans-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  --paper: oklch(95.9% .017 91);
  --paper-deep: oklch(92.3% .026 88);
  --paper-light: oklch(98.4% .011 92);
  --ink: oklch(25.2% .055 260);
  --navy: oklch(20.5% .07 263);
  --navy-deep: oklch(16.2% .06 263);
  --blue: oklch(59.3% .216 258);
  --blue-deep: oklch(48.2% .19 257);
  --gold: oklch(82.2% .174 84);
  --gold-deep: oklch(66.4% .151 77);
  --green: oklch(64.7% .143 148);
  --red: oklch(63.8% .198 33);
  --muted: oklch(44.5% .042 264);
  --faint: oklch(58.5% .033 263);
  --line: oklch(79.6% .019 259);
  --line-soft: oklch(87.5% .016 260);
  --display: "Smiley Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shell: 1240px;
  --gutter: clamp(20px, 4.6vw, 64px);
  --section: clamp(88px, 11vw, 168px);
  --ease-out: cubic-bezier(.19, 1, .22, 1);
  --ease-soft: cubic-bezier(.33, 1, .68, 1);
  --shadow-frame: 0 32px 80px oklch(21% .05 260 / .22), 0 3px 0 oklch(20% .06 262);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::selection { background: var(--gold); color: var(--navy-deep); }

img { display: block; max-width: 100%; height: auto; }
svg { display: block; max-width: 100%; }
figure, h1, h2, h3, p, dl, dd, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--gold);
  color: var(--navy-deep);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform .2s var(--ease-out);
}

.skip-link:focus { transform: none; }

.page-noise {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .28;
  background-image: radial-gradient(oklch(26% .05 260 / .16) .65px, transparent .65px);
  background-size: 5px 5px;
  mix-blend-mode: multiply;
}

.shell {
  position: relative;
  z-index: 2;
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section { position: relative; padding: var(--section) 0; }

.section-index {
  color: var(--blue-deep);
  font: 800 12px/1.2 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(150px, .34fr) 1fr;
  gap: clamp(28px, 7vw, 104px);
  align-items: start;
  margin-bottom: clamp(46px, 7vw, 88px);
}

.section-intro h2 {
  max-width: 19ch;
  font-family: var(--display);
  font-size: clamp(38px, 5.4vw, 76px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -.015em;
}

.section-intro p:not(.section-index) {
  max-width: 60ch;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.82;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  height: 82px;
  border-bottom: 1px solid transparent;
  transition: height .35s var(--ease-out), background .35s var(--ease-out), border-color .35s var(--ease-out);
}

.site-header.is-solid {
  height: 70px;
  background: oklch(96.2% .015 91 / .94);
  border-color: var(--line);
  backdrop-filter: blur(18px) saturate(1.25);
}

.nav-shell {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 30px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand img { width: 42px; height: 42px; }

.brand-copy { display: grid; line-height: 1; }

.brand-copy strong {
  font-family: var(--display);
  font-size: 25px;
  font-weight: 400;
  letter-spacing: .02em;
}

.brand-copy small {
  margin-top: 5px;
  color: var(--muted);
  font: 800 9px/1 var(--mono);
  letter-spacing: .22em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 34px);
  margin-left: auto;
}

.site-nav a {
  position: relative;
  color: oklch(35% .045 262);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--blue);
  transition: right .3s var(--ease-out);
}

.site-nav a:hover::after { right: 0; }

.nav-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 19px;
  background: var(--navy);
  color: var(--paper-light);
  font-size: 13.5px;
  font-weight: 800;
  border: 2px solid var(--navy);
  box-shadow: 4px 4px 0 var(--gold);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), background .18s var(--ease-out);
}

.nav-action:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--gold);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  padding: 150px 0 40px;
  overflow: hidden;
  background:
    radial-gradient(1000px 620px at 86% 12%, oklch(85% .14 86 / .35), transparent 67%),
    radial-gradient(800px 480px at 6% 92%, oklch(63% .18 258 / .16), transparent 70%),
    var(--paper);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: .36;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(180deg, transparent 0, oklch(0% 0 0 / .9) 16%, transparent 86%);
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(410px, .88fr) minmax(540px, 1.12fr);
  align-items: center;
  gap: clamp(30px, 5vw, 74px);
  min-height: calc(100svh - 220px);
}

.hero-copy { position: relative; z-index: 5; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1.5px solid var(--navy);
  background: var(--paper-light);
  box-shadow: 4px 4px 0 var(--navy);
  font: 800 12px/1 var(--mono);
  letter-spacing: .06em;
}

.eyebrow span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px oklch(64% .14 148 / .14);
}

.hero h1 {
  max-width: 12ch;
  margin-top: 28px;
  font-family: var(--display);
  font-size: clamp(54px, 6.8vw, 100px);
  font-weight: 400;
  line-height: .98;
  letter-spacing: -.025em;
}

.hero h1 span { display: block; }

.hero h1 span:last-child {
  position: relative;
  z-index: 0;
  color: var(--blue-deep);
}

.hero h1 span:last-child::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: -.03em;
  right: -.03em;
  bottom: .05em;
  height: .18em;
  background: var(--gold);
}

.hero-lead {
  max-width: 52ch;
  margin-top: 30px;
  color: oklch(40% .045 263);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.85;
}

.hero-lead strong { color: var(--ink); font-weight: 800; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  min-height: 54px;
  padding: 0 25px;
  border: 2px solid var(--navy);
  font-size: 15px;
  font-weight: 800;
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), background .18s var(--ease-out), color .18s var(--ease-out);
}

.button svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 2; }

.button-primary {
  background: var(--navy);
  color: var(--paper-light);
  box-shadow: 6px 6px 0 var(--gold);
}

.button-primary:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--gold);
}

.button-ghost { background: oklch(98% .01 91 / .72); }

.button-ghost:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 var(--navy);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}

.hero-proof li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-green { background: var(--green); }
.dot-gold { background: var(--gold-deep); }
.dot-blue { background: var(--blue); }

.hero-stage {
  position: relative;
  min-height: 620px;
}

.signal-field {
  position: absolute;
  z-index: 0;
  top: 2%;
  left: -16%;
  width: 128%;
  opacity: .64;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.star-orbit {
  position: absolute;
  z-index: 3;
  top: -5%;
  right: 3%;
  width: clamp(120px, 14vw, 184px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.star-orbit img {
  position: relative;
  z-index: 2;
  width: 58%;
  filter: drop-shadow(0 14px 18px oklch(25% .07 260 / .2));
}

.orbit-ring {
  position: absolute;
  inset: 0;
  border: 1.5px solid var(--navy);
  border-radius: 50%;
}

.orbit-ring-b { inset: 13%; border-style: dashed; border-color: var(--blue); }

.console-frame {
  position: absolute;
  z-index: 2;
  top: 14%;
  right: 0;
  width: min(100%, 690px);
  border: 2px solid var(--navy);
  background: var(--paper-light);
  box-shadow: var(--shadow-frame);
  overflow: hidden;
  transform: rotate(.7deg);
}

.console-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 13px;
  background: var(--navy);
  color: var(--paper-light);
}

.console-bar span {
  width: 9px;
  height: 9px;
  border: 1px solid oklch(95% .01 92 / .55);
  border-radius: 50%;
}

.console-bar span:nth-child(1) { background: oklch(62% .18 33); }
.console-bar span:nth-child(2) { background: var(--gold); }
.console-bar span:nth-child(3) { background: var(--green); }

.console-bar b {
  margin-left: 10px;
  color: oklch(90% .02 92 / .72);
  font: 700 11px/1 var(--mono);
  letter-spacing: .04em;
}

.shot-window {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  cursor: zoom-in;
}

.shot-window:focus-visible { outline: 3px solid var(--blue); outline-offset: -3px; }

.shot-window .shot-native {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
}

.shot-window:not(.shot-window-feature) { max-height: none; }

.shot-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 13px;
  border: 0;
  border-top: 1.5px solid var(--navy);
  background: var(--gold);
  color: var(--navy-deep);
  font: 800 11.5px/1 var(--mono);
  letter-spacing: .03em;
  cursor: pointer;
  text-align: left;
}

.shot-hint:hover { background: oklch(86% .17 86); }

.shot-hint-icon { font-size: 14px; line-height: 1; }

.live-chip {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 176px;
  padding: 11px 14px;
  border: 1.5px solid var(--navy);
  background: var(--paper-light);
  box-shadow: 5px 5px 0 var(--navy);
}

.live-chip b { display: block; font-size: 13px; line-height: 1.2; }
.live-chip small { display: block; margin-top: 4px; color: var(--muted); font-size: 10.5px; line-height: 1.2; }
.live-chip .pulse { width: 10px; height: 10px; border-radius: 50%; background: var(--green); }
.chip-mark { display: grid; place-items: center; width: 29px; height: 29px; background: var(--gold); border: 1.5px solid var(--navy); font-size: 12px; font-weight: 900; }
.chip-wechat { left: -6%; bottom: 23%; }
.chip-reply { right: -5%; bottom: 35%; }
.chip-safe { left: 8%; bottom: -4%; }

.hero-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
}

.hero-scroll { display: inline-flex; align-items: center; gap: 12px; font-family: var(--mono); }
.hero-scroll i { display: block; width: 38px; height: 1px; background: var(--navy); }

.ticker {
  position: relative;
  z-index: 4;
  overflow: hidden;
  border-top: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  background: var(--gold);
  color: var(--navy-deep);
}

.ticker-track {
  display: flex;
  align-items: center;
  width: max-content;
  height: 52px;
  animation: ticker 28s linear infinite;
}

.ticker-track span {
  padding: 0 30px;
  font-family: var(--display);
  font-size: 22px;
  white-space: nowrap;
}

.ticker-track i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
}

@keyframes ticker { to { transform: translateX(-50%); } }

/* Situation */
.situation { background: var(--paper); }

.situation-list { border-top: 2px solid var(--navy); }

.situation-row {
  display: grid;
  grid-template-columns: 80px minmax(280px, .78fr) minmax(320px, 1fr) 130px;
  align-items: center;
  gap: clamp(20px, 4vw, 52px);
  min-height: 164px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  transition: background .35s var(--ease-out), padding .35s var(--ease-out);
}

.situation-row:hover { padding-left: 18px; padding-right: 18px; background: var(--paper-light); }

.situation-no {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1.5px solid var(--navy);
  border-radius: 50%;
  font: 800 13px/1 var(--mono);
}

.situation-row h3 { font-size: clamp(20px, 2vw, 27px); line-height: 1.35; }
.situation-row p { color: var(--muted); font-size: 15px; }

.situation-word {
  justify-self: end;
  color: var(--blue);
  font-family: var(--display);
  font-size: clamp(58px, 8vw, 112px);
  font-weight: 400;
  line-height: .8;
}

.situation-note {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-top: 54px;
  padding: 30px clamp(24px, 4vw, 48px);
  background: var(--navy);
  color: var(--paper-light);
}

.situation-note span { color: oklch(88% .025 92 / .72); font-size: 16px; }
.situation-note strong { color: var(--gold); font-family: var(--display); font-size: clamp(24px, 3vw, 40px); font-weight: 400; }

/* Workflow */
.workflow {
  overflow: hidden;
  background: var(--navy);
  color: var(--paper-light);
}

.workflow::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .18;
  background-image:
    linear-gradient(oklch(96% .02 91 / .15) 1px, transparent 1px),
    linear-gradient(90deg, oklch(96% .02 91 / .15) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(180deg, transparent, oklch(0% 0 0 / .9) 24%, transparent 92%);
}

.workflow .section-index { color: var(--gold); }
.workflow .section-intro p:not(.section-index) { color: oklch(85% .026 92 / .72); }

.pipeline { position: relative; padding: 42px 0 12px; }

.pipeline-line {
  position: absolute;
  top: 90px;
  left: 7%;
  right: 7%;
  height: 2px;
  overflow: hidden;
  background: oklch(95% .02 92 / .18);
}

.pipeline-progress {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--gold);
  transform-origin: left center;
}

.pipeline-steps {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(18px, 2.6vw, 34px);
}

.pipeline-step {
  position: relative;
  min-height: 355px;
  padding: 0 4px;
}

.step-no {
  display: block;
  color: oklch(90% .03 92 / .48);
  font: 800 11px/1 var(--mono);
  letter-spacing: .12em;
}

.step-icon {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 98px;
  height: 98px;
  margin: 26px 0 30px;
  border: 2px solid var(--paper-light);
  background: var(--navy);
  color: var(--gold);
  transition: background .4s var(--ease-out), color .4s var(--ease-out), transform .4s var(--ease-out);
}

.step-icon svg { width: 46px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

.pipeline-step:hover .step-icon,
.pipeline-step.is-active .step-icon {
  background: var(--gold);
  color: var(--navy-deep);
  transform: translateY(-6px);
}

.pipeline-step h3 { font-size: 24px; }
.pipeline-step p { margin-top: 14px; color: oklch(91% .02 92 / .84); font-size: 14.5px; line-height: 1.8; }

.step-label {
  display: inline-block;
  margin-top: 24px;
  padding: 7px 10px;
  border: 1px solid oklch(95% .02 92 / .24);
  color: var(--gold);
  font: 800 10px/1 var(--mono);
  letter-spacing: .08em;
}

.flow-art {
  position: absolute;
  z-index: 1;
  right: -12%;
  bottom: -12%;
  width: 45%;
  opacity: .13;
  pointer-events: none;
}

/* Capabilities */
.capabilities { background: var(--paper-light); }

.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(36px, 7vw, 104px);
  padding: clamp(42px, 6vw, 82px) 0;
  border-bottom: 1px solid var(--line);
}

.feature-copy { max-width: 540px; }

.feature-kicker {
  display: inline-block;
  padding: 7px 12px;
  background: var(--gold);
  color: var(--navy-deep);
  font: 800 11px/1 var(--mono);
  letter-spacing: .08em;
}

.feature h3 {
  margin-top: 22px;
  font-family: var(--display);
  font-size: clamp(34px, 4vw, 56px);
  font-weight: 400;
  line-height: 1.1;
}

.feature-copy > p:not(.feature-kicker) { margin-top: 22px; color: var(--muted); font-size: 16px; line-height: 1.86; }

.feature-points {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.feature-points li {
  position: relative;
  padding-left: 20px;
  color: oklch(39% .04 262);
  font-size: 14.5px;
  font-weight: 700;
}

.feature-points li::before {
  content: "";
  position: absolute;
  top: .72em;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--blue);
  transform: rotate(45deg);
}

.feature-visual {
  position: relative;
  border: 2px solid var(--navy);
  background: var(--paper);
  box-shadow: 10px 10px 0 var(--navy);
  overflow: hidden;
}

.feature-visual > img { width: 100%; }

.shot-window-feature { max-height: none; }

.shot-lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: oklch(16% .04 263 / .96);
  padding: 54px 18px 18px;
}

.shot-lightbox[hidden] { display: none; }

.shot-lightbox-scroll {
  width: 100%;
  height: 100%;
  overflow: auto;
  display: grid;
  place-items: start center;
}

.shot-lightbox img {
  width: auto;
  max-width: none;
  height: auto;
  box-shadow: 0 30px 80px oklch(0% 0 0 / .5);
}

.shot-lightbox-close {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 2;
  padding: 9px 16px;
  border: 1.5px solid var(--paper-light);
  background: var(--gold);
  color: var(--navy-deep);
  font: 800 13px/1 var(--sans);
  cursor: pointer;
}

.visual-conversation {
  display: grid;
  grid-template-columns: 1fr 176px;
  gap: 12px;
  padding: 18px;
  background:
    radial-gradient(420px 260px at 70% 10%, oklch(84% .14 86 / .4), transparent 70%),
    var(--paper);
}

.message-stack { display: grid; gap: 12px; }

.message-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 92%;
  padding: 13px 14px;
  border: 1.5px solid var(--navy);
  background: var(--paper-light);
}

.message-row p { flex: 1; font-size: 13.5px; line-height: 1.55; }
.message-row time { color: var(--faint); font: 700 10px/1 var(--mono); white-space: nowrap; }
.message-row > span { display: grid; place-items: center; flex: none; width: 29px; height: 29px; background: var(--gold); border: 1.5px solid var(--navy); font-size: 11px; font-weight: 900; }
.message-row.outgoing { margin-left: auto; background: var(--navy); color: var(--paper-light); }
.message-row.outgoing > span { background: var(--blue); color: var(--paper-light); }
.message-row.outgoing time { color: oklch(88% .02 92 / .6); }
.message-row.small { max-width: 66%; }

.trigger-panel {
  align-self: end;
  display: grid;
  gap: 9px;
  padding: 16px;
  border: 1.5px solid var(--navy);
  background: var(--gold);
}

.trigger-panel > span { font: 800 10px/1 var(--mono); letter-spacing: .08em; }
.trigger-panel b { font-size: 14px; line-height: 1.4; }

.switch-on {
  position: relative;
  display: block;
  width: 48px;
  height: 26px;
  margin-top: 6px;
  border: 1.5px solid var(--navy);
  background: var(--green);
}

.switch-on em {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 17px;
  height: 17px;
  background: var(--paper-light);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: clamp(56px, 8vw, 104px);
  border-top: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
}

.capability-item {
  position: relative;
  min-height: 430px;
  padding: clamp(28px, 3vw, 42px);
  overflow: hidden;
}

.capability-item + .capability-item { border-left: 1px solid var(--line); }

.capability-no {
  position: relative;
  z-index: 2;
  color: var(--blue-deep);
  font: 800 11px/1 var(--mono);
}

.capability-item h3 { position: relative; z-index: 2; margin-top: 180px; font-size: 24px; }
.capability-item p { position: relative; z-index: 2; margin-top: 14px; color: var(--muted); font-size: 14.5px; }

.capability-item img {
  position: absolute;
  top: 48px;
  left: 50%;
  width: 72%;
  max-height: 180px;
  object-fit: contain;
  transform: translateX(-50%);
  transition: transform .5s var(--ease-out);
}

.capability-item:hover img { transform: translateX(-50%) translateY(-8px) scale(1.04); }

.mini-graph {
  position: absolute;
  top: 56px;
  left: 50%;
  width: 180px;
  height: 150px;
  transform: translateX(-50%);
}

.mini-graph::before,
.mini-graph::after {
  content: "";
  position: absolute;
  background: var(--line);
}

.mini-graph::before { top: 50%; left: 12%; right: 12%; height: 1.5px; transform: rotate(18deg); }
.mini-graph::after { top: 50%; left: 12%; right: 12%; height: 1.5px; transform: rotate(-31deg); }

.mini-graph i {
  position: absolute;
  z-index: 2;
  width: 38px;
  height: 38px;
  border: 1.5px solid var(--navy);
  background: var(--gold);
}

.mini-graph i:nth-child(1) { top: 52px; left: 70px; background: var(--navy); }
.mini-graph i:nth-child(2) { top: 8px; left: 18px; }
.mini-graph i:nth-child(3) { top: 16px; right: 14px; background: var(--blue); }
.mini-graph i:nth-child(4) { bottom: 6px; left: 22px; background: var(--paper-light); }
.mini-graph i:nth-child(5) { right: 18px; bottom: 0; background: var(--green); }

.waveform {
  position: absolute;
  top: 72px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 9px;
  height: 130px;
  transform: translateX(-50%);
}

.waveform i { width: 12px; background: var(--blue); }
.waveform i:nth-child(1), .waveform i:nth-child(7) { height: 30px; }
.waveform i:nth-child(2), .waveform i:nth-child(6) { height: 58px; background: var(--gold); }
.waveform i:nth-child(3), .waveform i:nth-child(5) { height: 94px; }
.waveform i:nth-child(4) { height: 126px; background: var(--navy); }

/* Safety */
.safety {
  overflow: hidden;
  background: var(--paper-deep);
}

.safety-art {
  position: absolute;
  top: 7%;
  right: -8%;
  width: min(46vw, 670px);
  opacity: .2;
  pointer-events: none;
}

.safety-shell { position: relative; z-index: 2; }

.safety-intro { position: relative; }

.safety-rules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 2px solid var(--navy);
  border-left: 1px solid var(--line);
}

.safety-rules article {
  min-height: 250px;
  padding: clamp(28px, 4vw, 48px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: oklch(97% .012 92 / .62);
  transition: background .35s var(--ease-out);
}

.safety-rules article:hover { background: var(--gold); }

.safety-rules article > span { color: var(--blue-deep); font: 800 11px/1 var(--mono); }
.safety-rules h3 { margin-top: 44px; font-size: 24px; }
.safety-rules p { margin-top: 14px; color: var(--muted); font-size: 14.5px; }
.safety-rules article:hover p { color: oklch(32% .05 260); }

.safety-foot {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}

.safety-seal {
  flex: none;
  padding: 9px 13px;
  border: 1.5px solid var(--navy);
  background: var(--navy);
  color: var(--gold);
  font-weight: 900;
  font-size: 13px;
}

.safety-foot p { color: var(--muted); font-size: 14px; }

.safety-shot {
  margin-top: clamp(36px, 6vw, 64px);
  border: 2px solid var(--navy);
  background: var(--paper-light);
  box-shadow: 10px 10px 0 var(--navy);
}

.safety-shot figcaption {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

/* Install */
.install { background: var(--paper-light); }

.install-shell {
  display: grid;
  grid-template-columns: minmax(340px, .9fr) minmax(420px, 1.1fr);
  gap: clamp(52px, 9vw, 140px);
  align-items: start;
}

.install-copy { position: sticky; top: 110px; }

.install-copy h2 {
  margin-top: 22px;
  font-family: var(--display);
  font-size: clamp(40px, 5vw, 68px);
  font-weight: 400;
  line-height: 1.08;
}

.install-copy > p:not(.section-index) { max-width: 48ch; margin-top: 24px; color: var(--muted); font-size: 16px; }

.requirement-list { margin-top: 34px; border-top: 1.5px solid var(--navy); }

.requirement-list div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.requirement-list dt { color: var(--faint); font: 800 11px/1.7 var(--mono); }
.requirement-list dd { font-size: 14.5px; font-weight: 700; }

.install-steps { border-top: 2px solid var(--navy); }

.install-steps li {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 24px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.install-steps li > span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--navy);
  border-radius: 50%;
  font: 800 12px/1 var(--mono);
}

.install-steps li:first-child > span { background: var(--gold); }
.install-steps h3 { font-size: 21px; }
.install-steps p { margin-top: 9px; color: var(--muted); font-size: 14.5px; }

/* Contact */
.contact {
  overflow: hidden;
  background: var(--navy);
  color: var(--paper-light);
}

.contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 460px at 84% 18%, oklch(59% .21 258 / .28), transparent 70%),
    radial-gradient(600px 480px at 12% 100%, oklch(82% .17 84 / .13), transparent 68%);
}

.contact-shell {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: clamp(48px, 8vw, 124px);
  align-items: center;
}

.contact .section-index { color: var(--gold); }

.contact-copy h2 {
  margin-top: 22px;
  font-family: var(--display);
  font-size: clamp(44px, 6vw, 82px);
  font-weight: 400;
  line-height: 1.04;
}

.contact-copy > p:not(.section-index) { max-width: 54ch; margin-top: 26px; color: oklch(88% .025 92 / .72); font-size: 17px; line-height: 1.86; }

.contact-routes { display: grid; gap: 0; margin-top: 36px; border-top: 1px solid oklch(95% .02 92 / .22); }
.contact-routes div { display: grid; grid-template-columns: 116px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid oklch(95% .02 92 / .22); }
.contact-routes span { color: var(--gold); font: 800 11px/1.7 var(--mono); letter-spacing: .06em; }
.contact-routes b { font-size: 16px; }

.qr-panel {
  justify-self: center;
  width: min(100%, 390px);
  padding: 28px;
  border: 2px solid var(--paper-light);
  background: oklch(97.5% .012 92);
  color: var(--navy-deep);
  box-shadow: 12px 12px 0 var(--gold);
}

.qr-frame { position: relative; padding: 14px; border: 1.5px solid var(--navy); background: var(--paper-light); }
.qr-frame img { width: 100%; }

.qr-corner { position: absolute; width: 20px; height: 20px; border: 0 solid var(--blue); }
.qr-corner-a { top: 5px; left: 5px; border-top-width: 3px; border-left-width: 3px; }
.qr-corner-b { top: 5px; right: 5px; border-top-width: 3px; border-right-width: 3px; }
.qr-corner-c { bottom: 5px; left: 5px; border-bottom-width: 3px; border-left-width: 3px; }
.qr-corner-d { bottom: 5px; right: 5px; border-bottom-width: 3px; border-right-width: 3px; }

.qr-panel h3 { margin-top: 24px; font-size: 22px; }
.qr-panel p { margin-top: 8px; color: var(--muted); font-size: 13.5px; }

.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; color: var(--blue-deep); font-size: 13.5px; font-weight: 800; }
.text-link span { transition: transform .2s var(--ease-out); }
.text-link:hover span { transform: translateY(-3px); }

.contact-wordmark {
  position: absolute;
  z-index: 1;
  right: -2%;
  bottom: -16%;
  color: oklch(95% .02 92 / .035);
  font-family: var(--display);
  font-size: clamp(180px, 34vw, 520px);
  line-height: .8;
  pointer-events: none;
}

/* Footer */
.site-footer { position: relative; z-index: 3; background: var(--navy-deep); color: var(--paper-light); }

.footer-shell {
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 86px;
}

.footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; }
.footer-brand img { width: 34px; }
.footer-shell p { margin-left: auto; color: oklch(92% .018 92 / .74); font-size: 12.5px; }
.footer-shell > a:last-child { color: var(--gold); font-size: 13px; font-weight: 800; }

/* Motion states */
.motion-pending .hero-copy > *,
.motion-pending .hero-stage,
.motion-pending [data-reveal],
.motion-pending [data-stagger] > *,
.motion-pending .feature {
  opacity: 0;
}

.gsap-ready .motion-pending .hero-copy > * { opacity: 1; }

/* Responsive */
@media (max-width: 1120px) {
  .hero-shell { grid-template-columns: .95fr 1.05fr; }
  .hero-stage { min-height: 540px; }
  .chip-wechat { left: 0; }
  .chip-reply { right: 0; }
  .situation-row { grid-template-columns: 64px 1fr 1.1fr 90px; }
}

@media (max-width: 900px) {
  :root { --section: clamp(72px, 12vw, 112px); }
  .site-header { height: 70px; }
  .site-nav { display: none; }
  .nav-action { margin-left: auto; }
  .hero { padding-top: 112px; }
  .hero-shell { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { padding-bottom: 10px; }
  .hero h1 { max-width: 11ch; }
  .hero-stage { min-height: 520px; margin-top: 18px; }
  .console-frame { width: min(100%, 660px); }
  .signal-field { left: -4%; width: 108%; }
  .section-intro { grid-template-columns: 1fr; gap: 18px; }
  .section-intro h2 { max-width: 18ch; }
  .situation-row { grid-template-columns: 55px 1fr 80px; }
  .situation-row p { grid-column: 2 / 3; }
  .situation-word { grid-column: 3; grid-row: 1 / 3; }
  .pipeline-line { top: 82px; left: 5%; right: 5%; }
  .pipeline-steps { grid-template-columns: repeat(2, 1fr); gap: 48px 28px; }
  .pipeline-step { min-height: 300px; }
  .pipeline-line { display: none; }
  .flow-art { right: -22%; bottom: -6%; width: 58%; opacity: .11; }
  .feature { grid-template-columns: 1fr; gap: 34px; }
  .feature-jargon .feature-visual { order: 2; }
  .feature-jargon .feature-copy { order: 1; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-item { min-height: 350px; }
  .capability-item + .capability-item { border-left: 0; border-top: 1px solid var(--line); }
  .capability-item h3 { margin-top: 150px; }
  .capability-item img { top: 36px; max-height: 150px; }
  .mini-graph, .waveform { top: 42px; height: 132px; }
  .safety-art { top: 4%; right: -22%; width: 72vw; }
  .install-shell { grid-template-columns: 1fr; gap: 54px; }
  .install-copy { position: static; }
  .contact-shell { grid-template-columns: 1fr; }
  .qr-panel { justify-self: start; }
  .footer-shell { flex-wrap: wrap; padding: 20px 0; }
  .footer-shell p { order: 3; width: 100%; margin-left: 0; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .shell { width: min(100% - 36px, var(--shell)); }
  .brand-copy small { display: none; }
  .brand img { width: 38px; height: 38px; }
  .nav-action { min-height: 40px; padding: 0 14px; font-size: 12.5px; }
  .hero { padding-top: 100px; }
  .hero h1 { font-size: clamp(46px, 14vw, 66px); }
  .hero-lead { margin-top: 24px; font-size: 15.5px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .hero-proof { gap: 10px 16px; }
  .hero-stage { min-height: 400px; }
  .signal-field { top: 4%; left: -14%; width: 128%; }
  .console-frame { top: 18%; }
  .console-bar { height: 34px; }
  .star-orbit { top: -4%; right: -2%; width: 112px; }
  .live-chip { min-width: 146px; padding: 9px 11px; }
  .live-chip b { font-size: 12px; }
  .live-chip small { font-size: 9.5px; }
  .chip-wechat { left: -3%; bottom: 15%; }
  .chip-reply { right: -3%; bottom: 37%; }
  .chip-safe { left: 4%; bottom: -5%; }
  .hero-foot { align-items: flex-start; flex-direction: column; gap: 10px; }
  .ticker-track { height: 44px; }
  .ticker-track span { padding: 0 20px; font-size: 18px; }
  .section-intro h2 { font-size: clamp(34px, 10.5vw, 48px); }
  .section-intro p:not(.section-index) { font-size: 15.5px; }
  .situation-row { grid-template-columns: 44px 1fr 56px; min-height: 0; gap: 14px; padding: 22px 0; }
  .situation-row h3 { font-size: 18px; }
  .situation-row p { font-size: 14px; }
  .situation-word { font-size: 52px; }
  .situation-note { align-items: flex-start; flex-direction: column; padding: 24px 20px; }
  .situation-note strong { font-size: 26px; }
  .pipeline { padding-top: 10px; }
  .pipeline-steps { grid-template-columns: 1fr; gap: 0; }
  .pipeline-step { min-height: 0; padding: 28px 0; border-bottom: 1px solid oklch(95% .02 92 / .18); }
  .step-icon { width: 76px; height: 76px; margin: 18px 0 22px; }
  .step-icon svg { width: 36px; }
  .feature { padding: 44px 0; }
  .feature h3 { font-size: 33px; }
  .visual-conversation { grid-template-columns: 1fr; }
  .message-row { max-width: 100%; }
  .trigger-panel { grid-template-columns: 1fr auto; align-items: center; }
  .trigger-panel > span { grid-column: 1 / 3; }
  .capability-item { min-height: 320px; padding: 24px; }
  .capability-item h3 { margin-top: 132px; font-size: 21px; }
  .capability-item img { max-height: 130px; }
  .mini-graph { transform: translateX(-50%) scale(.8); }
  .waveform { transform: translateX(-50%) scale(.82); }
  .safety-rules { grid-template-columns: 1fr; }
  .safety-rules article { min-height: 0; }
  .safety-rules h3 { margin-top: 26px; font-size: 21px; }
  .safety-foot { align-items: flex-start; flex-direction: column; }
  .install-copy h2, .contact-copy h2 { font-size: clamp(38px, 11vw, 52px); }
  .requirement-list div { grid-template-columns: 84px 1fr; }
  .install-steps li { grid-template-columns: 54px 1fr; gap: 16px; }
  .contact-routes div { grid-template-columns: 1fr; gap: 5px; }
  .qr-panel { padding: 20px; box-shadow: 8px 8px 0 var(--gold); }
  .contact-wordmark { right: -10%; bottom: -4%; font-size: 190px; }
  .footer-shell { align-items: flex-start; flex-direction: column; gap: 12px; min-height: 0; }
  .footer-shell > a:last-child { margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .motion-pending .hero-copy > *,
  .motion-pending .hero-stage,
  .motion-pending [data-reveal],
  .motion-pending [data-stagger] > *,
  .motion-pending .feature { opacity: 1; }
}