:root {
  --paper: #f7f8f4;
  --white: #ffffff;
  --ink: #17211b;
  --muted: #607067;
  --line: #dce3dd;
  --green: #18a957;
  --green-dark: #0f743d;
  --green-soft: #e3f6e9;
  --blue: #2879b8;
  --blue-soft: #e8f3fb;
  --coral: #e7664c;
  --coral-soft: #ffede8;
  --yellow: #f6c851;
  --shadow: 0 18px 50px rgba(31, 55, 41, .11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, select, input { font: inherit; letter-spacing: 0; }
button { color: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.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;
}

/* Navigation */
.site-nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  background: rgba(247, 248, 244, .92);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(14px);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-nav.scrolled { border-color: var(--line); box-shadow: 0 8px 30px rgba(31, 55, 41, .06); }
.nav-row { height: 70px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
.brand-mark {
  width: 32px; height: 32px; display: grid; place-items: center;
  border: 2px solid var(--ink); border-radius: 8px; background: var(--green);
  box-shadow: inset 0 0 0 5px var(--paper);
}
.brand-mark::after { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }
.brand-name { white-space: nowrap; }
.nav-links { display: flex; align-items: center; justify-content: center; gap: 26px; margin-left: auto; }
.nav-links a { position: relative; color: var(--muted); font-size: 14px; font-weight: 650; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px;
  background: var(--green); transition: right .2s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { right: 0; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.lang-control { position: relative; }
.lang-select {
  height: 38px; min-width: 118px; padding: 0 32px 0 12px;
  border: 1px solid var(--line); border-radius: 6px; background: var(--white);
  color: var(--ink); cursor: pointer;
}
.icon-button {
  width: 40px; height: 40px; display: none; place-items: center;
  padding: 0; border: 1px solid var(--line); border-radius: 6px; background: var(--white); cursor: pointer;
}
.icon-button span, .icon-button::before, .icon-button::after {
  content: ""; width: 18px; height: 2px; display: block; background: var(--ink); transition: transform .2s ease, opacity .2s ease;
}
.icon-button::before { transform: translateY(-5px); }
.icon-button::after { transform: translateY(5px); }
.icon-button[aria-expanded="true"] span { opacity: 0; }
.icon-button[aria-expanded="true"]::before { transform: translateY(2px) rotate(45deg); }
.icon-button[aria-expanded="true"]::after { transform: translateY(-2px) rotate(-45deg); }

/* Shared type and controls */
.eyebrow { margin: 0 0 12px; color: var(--green-dark); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.display-title { margin: 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.03; font-weight: 850; }
.section-title { margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.13; font-weight: 820; }
.section-lead { max-width: 650px; margin: 16px 0 0; color: var(--muted); font-size: 17px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 42px; }
.section-head.center { display: block; text-align: center; }
.section-head.center .section-lead { margin-inline: auto; }
.btn {
  min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 0 20px; border: 1px solid transparent; border-radius: 6px; font-weight: 750; cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--ink); color: var(--white); box-shadow: 0 10px 22px rgba(23, 33, 27, .16); }
.btn-primary:hover { background: var(--green-dark); box-shadow: 0 14px 28px rgba(15, 116, 61, .22); }
.btn-secondary { border-color: var(--line); background: var(--white); }
.btn-secondary:hover { border-color: var(--ink); }
.arrow { font-size: 18px; line-height: 1; }
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 5px 10px; border-radius: 999px; font-size: 12px; font-weight: 750; }
.pill-green { background: var(--green-soft); color: var(--green-dark); }
.pill-blue { background: var(--blue-soft); color: var(--blue); }
.pill-coral { background: var(--coral-soft); color: #a84231; }

/* Home hero */
.home-hero {
  min-height: min(860px, 92svh); padding: 120px 0 64px; position: relative; overflow: hidden;
  display: grid; align-items: center; border-bottom: 1px solid var(--line); background: #edf3ed;
}
.home-hero::before {
  content: ""; position: absolute; inset: 0 0 0 54%; background: #dce9df; border-left: 1px solid #ccdbcf;
}
.hero-layout { position: relative; z-index: 2; display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: center; }
.hero-copy { max-width: 570px; }
.hero-copy .display-title strong { color: var(--green-dark); font-weight: inherit; }
.hero-desc { max-width: 570px; margin: 22px 0 0; color: #4f6256; font-size: 19px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.hero-points { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 30px; color: var(--muted); font-size: 13px; }
.hero-points span { display: inline-flex; align-items: center; gap: 7px; }
.hero-points i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

.product-scene { position: relative; min-height: 570px; display: grid; place-items: center; isolation: isolate; }
.wall-panel {
  width: min(520px, 100%); aspect-ratio: 1 / 1.05; position: relative; overflow: hidden;
  background: #f5f3ed; border: 1px solid #cfd8d1; box-shadow: var(--shadow);
}
.wall-panel::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(#d6ddd6 1px, transparent 1px), linear-gradient(90deg, #d6ddd6 1px, transparent 1px);
  background-size: 44px 44px; opacity: .34;
}
.scene-label { position: absolute; top: 20px; left: 20px; z-index: 5; }
.wall-switch {
  position: absolute; z-index: 2; width: 160px; height: 230px; left: 50%; top: 46%;
  transform: translate(-12%, -50%); padding: 0; border: 8px solid #fff; background: #29312c;
  box-shadow: 0 16px 34px rgba(38, 48, 41, .14);
}
.wall-switch::after { content: ""; position: absolute; left: 19px; right: 19px; top: 42px; height: 28px; background: repeating-linear-gradient(0deg, #667169 0 2px, transparent 2px 7px); opacity: .65; }
.switch-rocker { width: 34%; height: auto; aspect-ratio: 1; position: absolute; left: 10%; top: 74%; border: 3px solid #aeb8b0; border-radius: 50%; background: #edf1ee; transition: transform .22s ease, background .22s ease; }
.switch-rocker::before { content: ""; position: absolute; left: 50%; top: 7%; width: 3px; height: 35%; border-radius: 3px; background: #6d776f; transform: translateX(-50%); }
.switch-rocker::after { content: ""; position: absolute; inset: 18%; border: 3px solid #6d776f; border-top-color: transparent; border-radius: 50%; }
.product-bot {
  position: absolute; z-index: 3; left: 50%; top: 50%; width: 156px; height: 210px;
  transform: translate(-105%, -37%); border: 2px solid #26352b; border-radius: 18px 18px 13px 13px; background: #fbfcfa;
  box-shadow: 0 22px 40px rgba(30, 49, 37, .2);
}
.product-bot::before { content: ""; position: absolute; inset: 12px; border: 1px solid #dfe5df; border-radius: 10px; }
.bot-led { position: absolute; z-index: 2; left: 21px; top: 20px; width: 10px; height: 10px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 7px rgba(24, 169, 87, .12); }
.bot-name { position: absolute; z-index: 2; left: 20px; bottom: 18px; font-size: 12px; font-weight: 850; }
.bot-arm {
  position: absolute; z-index: 4; width: 20px; height: 142px; right: 9px; top: 22px;
  border: 2px solid #27352c; border-radius: 11px; background: #dbe2dc;
  transform: rotate(-24deg); transform-origin: 50% 12px; transition: transform .32s cubic-bezier(.2,.8,.2,1);
}
.bot-arm::after { content: ""; position: absolute; left: 50%; bottom: -8px; width: 31px; height: 20px; border: 2px solid #27352c; border-radius: 7px; background: var(--coral); transform: translateX(-50%); }
.product-scene.is-pressing .bot-arm { transform: rotate(-5deg); }
.product-scene.is-pressing .switch-rocker { transform: scale(.9); background: #d8f1df; }
.product-scene.is-pressing .bot-led { animation: led-flash .65s ease; }
@keyframes led-flash { 50% { background: var(--yellow); box-shadow: 0 0 0 12px rgba(246, 200, 81, .18); } }
.demo-panel {
  position: absolute; z-index: 7; right: -18px; bottom: 28px; width: 230px; padding: 15px;
  border: 1px solid #ccd6ce; border-radius: 8px; background: rgba(255,255,255,.95); box-shadow: 0 15px 35px rgba(23,33,27,.14);
}
.demo-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 13px; }
.demo-button {
  width: 100%; min-height: 46px; margin-top: 12px; border: 0; border-radius: 6px;
  background: var(--green); color: #062d17; font-weight: 850; cursor: pointer;
  box-shadow: 0 8px 18px rgba(24,169,87,.25); transition: transform .12s ease, box-shadow .12s ease;
}
.demo-button:active, .demo-button.is-active { transform: translateY(2px); box-shadow: 0 3px 8px rgba(24,169,87,.2); }
.demo-status { min-height: 20px; margin: 8px 0 0; color: var(--muted); font-size: 12px; }

/* Home sections */
.trust-band { padding: 22px 0; border-bottom: 1px solid var(--line); background: var(--white); }
.trust-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.trust-item { display: flex; align-items: center; justify-content: center; gap: 11px; min-height: 50px; padding: 0 22px; border-right: 1px solid var(--line); }
.trust-item:last-child { border-right: 0; }
.trust-icon { font-size: 20px; color: var(--green-dark); }
.trust-item b { display: block; font-size: 14px; }
.trust-item small { display: block; color: var(--muted); font-size: 12px; }
.content-section { padding: 96px 0; }
.content-section.alt { background: var(--white); border-block: 1px solid var(--line); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { padding: 26px 0 0; border-top: 2px solid var(--ink); }
.step-num { color: var(--green-dark); font-size: 13px; font-weight: 850; }
.step h3 { margin: 12px 0 8px; font-size: 22px; }
.step p { margin: 0; color: var(--muted); }
.step-visual { height: 370px; margin-top: 22px; display: grid; place-items: center; position: relative; overflow: hidden; border: 1px solid var(--line); background: #eef2ed; }
.step-visual img { width: 58px; height: 58px; object-fit: contain; image-rendering: auto; }
.step-visual .mini-bot { transform: scale(.58); }
.mini-bot { position: relative; width: 120px; height: 136px; border: 2px solid var(--ink); border-radius: 14px; background: #fff; }
.mini-bot::before { content: ""; position: absolute; width: 15px; height: 92px; right: 5px; top: 12px; border: 2px solid var(--ink); border-radius: 8px; background: #dbe2dc; transform: rotate(-20deg); }
.mini-bot::after { content: ""; position: absolute; left: 15px; top: 17px; width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 6px var(--green-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-item { min-height: 220px; padding: 24px; border: 1px solid var(--line); background: var(--paper); transition: border-color .2s ease, transform .2s ease; }
.feature-item:hover { border-color: var(--green); transform: translateY(-3px); }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 6px; background: var(--green-soft); color: var(--green-dark); font-size: 20px; }
.feature-item:nth-child(3n + 2) .feature-icon { background: var(--blue-soft); color: var(--blue); }
.feature-item:nth-child(3n) .feature-icon { background: var(--coral-soft); color: var(--coral); }
.feature-item h3 { margin: 28px 0 7px; font-size: 19px; }
.feature-item p { margin: 0; color: var(--muted); font-size: 14px; }

.mode-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 430px; border: 1px solid var(--line); background: var(--white); }
.mode-tabs { padding: 16px; border-right: 1px solid var(--line); background: #eef2ed; }
.mode-tab {
  width: 100%; min-height: 58px; display: flex; align-items: center; gap: 12px;
  padding: 0 14px; border: 1px solid transparent; border-radius: 6px; background: transparent; text-align: left; cursor: pointer;
}
.mode-tab + .mode-tab { margin-top: 8px; }
.mode-tab[aria-selected="true"] { border-color: var(--line); background: var(--white); box-shadow: 0 6px 16px rgba(31,55,41,.07); }
.mode-tab img { width: 28px; height: 28px; object-fit: contain; }
.mode-tab b { display: block; }
.mode-tab small { display: block; color: var(--muted); }
.mode-content { padding: 46px; }
.mode-pane { display: none; min-height: 330px; }
.mode-pane.active { display: grid; grid-template-columns: 1fr .9fr; gap: 40px; align-items: center; animation: fade-up .3s ease; }
@keyframes fade-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.mode-pane h3 { margin: 12px 0; font-size: 30px; line-height: 1.2; }
.mode-pane p { margin: 0; color: var(--muted); }
.plain-list { list-style: none; padding: 0; margin: 20px 0 0; }
.plain-list li { display: flex; gap: 10px; margin-top: 9px; }
.plain-list li::before { content: "✓"; color: var(--green-dark); font-weight: 900; }
.connection-visual { height: 370px; display: grid; place-items: center; position: relative; overflow: hidden; border: 1px solid var(--line); background: #f1f4f0; }
.connection-line { position: absolute; left: 20%; right: 20%; top: 50%; height: 2px; background: var(--green); }
.connection-line::after { content: ""; position: absolute; inset: -8px auto auto 48%; width: 16px; height: 16px; border-radius: 50%; background: var(--green); animation: travel 2.4s linear infinite; }
@keyframes travel { from { left: -3%; } to { left: 100%; } }
.connection-nodes { position: relative; z-index: 2; width: 76%; display: flex; align-items: center; justify-content: space-between; }
.connection-node { width: 76px; height: 76px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--white); font-size: 26px; box-shadow: 0 8px 20px rgba(31,55,41,.1); }
.connection-node img { width: 38px; height: 38px; object-fit: contain; }

/* Mini Program previews, adapted from the illustrated manual. */
app-preview { display: block; width: 164px; max-width: 88%; }
.connection-visual app-preview { width: 190px; }
.ui-phone {
  width: 100%; aspect-ratio: 390 / 844; padding: 6px; overflow: hidden;
  border: 2px solid #272d35; border-radius: 18px; background: #05070a;
  box-shadow: 0 14px 30px rgba(7, 16, 26, .22);
}
.ui-screen {
  height: 100%; position: relative; overflow: hidden; padding: 11px 8px 9px;
  border-radius: 12px; background: #0a0d12; color: #f4f6f8;
  font-size: 7px; line-height: 1.4;
}
.ui-notch { width: 42px; height: 4px; margin: -5px auto 7px; border-radius: 8px; background: #343c48; }
.ui-head { min-height: 21px; display: flex; align-items: center; gap: 5px; margin-bottom: 6px; }
.ui-head b { flex: 1; min-width: 0; font-size: 10px; line-height: 1.15; }
.ui-head small { display: block; margin-top: 2px; color: #98a3b2; font-size: 5.5px; font-weight: 400; }
.ui-section { display: flex; justify-content: space-between; gap: 5px; margin: 7px 1px 4px; color: #98a3b2; font-size: 6px; }
.ui-card, .ui-row { position: relative; border: 1px solid rgba(255,255,255,.08); border-radius: 6px; background: #151a22; }
.ui-card { padding: 7px; margin-bottom: 5px; }
.ui-card > b { display: block; font-size: 8px; }
.ui-card small, .ui-row small, .ui-tile small { display: block; color: #98a3b2; }
.ui-row { min-height: 35px; display: flex; align-items: center; gap: 5px; padding: 6px; margin-bottom: 4px; }
.ui-row b { display: block; font-size: 7px; line-height: 1.2; }
.ui-grow { flex: 1; min-width: 0; }
.ui-icon { flex: 0 0 21px; width: 21px; height: 21px; display: grid; place-items: center; border-radius: 5px; background: rgba(56,224,123,.12); color: #38e07b; font-size: 10px; }
.ui-online { color: #38e07b; font-size: 5.5px; }
.ui-online::before { content: ""; width: 4px; height: 4px; display: inline-block; margin-right: 2px; border-radius: 50%; background: #38e07b; box-shadow: 0 0 4px #38e07b; }
.ui-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.ui-tile { min-height: 76px; padding: 6px; position: relative; border: 1px solid rgba(255,255,255,.08); border-radius: 6px; background: #151a22; }
.ui-tile > i { height: 34px; display: grid; place-items: center; color: #38e07b; font-size: 20px; font-style: normal; }
.ui-tile > b { display: block; overflow: hidden; font-size: 7px; white-space: nowrap; text-overflow: ellipsis; }
.ui-fab { position: absolute; left: 22px; right: 22px; bottom: 8px; padding: 6px; border-radius: 12px; background: #38e07b; color: #062814; text-align: center; font-weight: 850; }
.ui-info { padding: 6px; margin-bottom: 6px; border: 1px solid rgba(92,185,255,.34); border-radius: 5px; background: rgba(92,185,255,.11); color: #d5edff; }
.ui-highlight { outline: 2px solid #38e07b; outline-offset: 1px; }
.ui-trigger { width: 84px; height: 84px; display: grid; place-items: center; margin: 8px auto; border: 6px solid #252d38; border-radius: 50%; background: #151b24; }
.ui-trigger span { width: 60px; height: 60px; display: grid; place-items: center; border-radius: 50%; background: #38e07b; color: #062814; font-size: 7px; font-weight: 850; text-align: center; }
.ui-children { padding: 5px; }
.ui-children .ui-row { margin: 0; border: 0; border-radius: 0; background: transparent; }
.ui-children .ui-row + .ui-row { border-top: 1px solid rgba(255,255,255,.08); }
.ui-real { background: #eef1f3; color: #25313b; }
.ui-install { height: 205px; position: relative; margin: 16px 0 12px; }
.ui-wall-switch { width: 69px; height: 104px; position: absolute; right: 12px; top: 42px; border: 5px solid #fff; background: #29312c; box-shadow: 0 8px 18px rgba(23,33,27,.13); }
.ui-wall-switch::before { content: ""; width: 24px; height: 24px; position: absolute; left: 7px; top: 65px; border: 3px solid #b9c4bc; border-radius: 50%; background: #edf1ee; box-shadow: inset 0 0 0 6px #29312c; }
.ui-wall-switch::after { content: ""; width: 2px; height: 9px; position: absolute; left: 18px; top: 63px; border-radius: 2px; background: #29312c; }
.ui-install-bot { width: 72px; height: 100px; position: absolute; left: 13px; top: 80px; border: 2px solid #27352c; border-radius: 10px; background: #fff; }
.ui-install-bot span { width: 7px; height: 7px; position: absolute; left: 10px; top: 10px; border-radius: 50%; background: #18a957; box-shadow: 0 0 0 5px #e3f6e9; }
.ui-install-bot i { width: 11px; height: 70px; position: absolute; right: 2px; top: 12px; border: 2px solid #27352c; border-radius: 7px; background: #dbe2dc; transform: rotate(-21deg); transform-origin: top; }
.ui-install-bot i::after { content: ""; width: 19px; height: 13px; position: absolute; left: 50%; bottom: -7px; border: 2px solid #27352c; border-radius: 5px; background: #e7664c; transform: translateX(-50%); }
.ui-real-title, .ui-real-note { display: block; text-align: center; }
.ui-real-title { font-size: 9px; }
.ui-real-note { margin-top: 3px; color: #607067; font-size: 7px; }

.scene-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; grid-template-rows: 250px 250px; gap: 16px; }
.scene-card { position: relative; overflow: hidden; padding: 25px; border: 1px solid var(--line); background: var(--white); }
.scene-card:first-child { grid-row: 1 / 3; background: #dfeee2; }
.scene-card h3 { position: relative; z-index: 2; margin: 0 0 7px; font-size: 21px; }
.scene-card p { position: relative; z-index: 2; max-width: 310px; margin: 0; color: var(--muted); font-size: 14px; }
.scene-art { position: absolute; right: 18px; bottom: 10px; width: 120px; height: 100px; opacity: .92; }
.scene-card:first-child .scene-art { right: 24px; bottom: 18px; width: 230px; height: 250px; }
.scene-art .mini-bot { position: absolute; right: 18px; bottom: 6px; transform: scale(.78); transform-origin: bottom right; }
.scene-lines { position: absolute; inset: auto 0 22px; display: grid; gap: 10px; padding: 0 24px; }
.scene-lines span { height: 9px; background: #cdd9d0; }
.scene-lines span:nth-child(2) { width: 76%; }
.scene-lines span:nth-child(3) { width: 54%; }
.scene-clock { position: absolute; right: 30px; bottom: 24px; width: 78px; height: 78px; border: 8px solid var(--blue); border-radius: 50%; }
.scene-clock::before, .scene-clock::after { content: ""; position: absolute; left: 50%; top: 50%; width: 3px; background: var(--blue); transform-origin: bottom; }
.scene-clock::before { height: 22px; transform: translate(-50%,-100%) rotate(20deg); }
.scene-clock::after { height: 17px; transform: translate(-50%,-100%) rotate(118deg); }
.scene-share { position: absolute; right: 30px; bottom: 22px; display: flex; }
.scene-share i { width: 54px; height: 54px; border: 4px solid #fff; border-radius: 50%; background: var(--coral); margin-left: -14px; }
.scene-share i:first-child { background: var(--blue); }
.scene-share i:last-child { background: var(--green); }

.bottom-cta { padding: 84px 0; background: var(--ink); color: var(--white); }
.cta-row { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-row h2 { max-width: 690px; margin: 0; font-size: clamp(31px, 4vw, 50px); line-height: 1.12; }
.cta-row p { max-width: 560px; margin: 14px 0 0; color: #b9c6bd; }
.cta-actions { display: flex; flex: 0 0 auto; gap: 10px; flex-wrap: wrap; }
.bottom-cta .btn-primary { background: var(--green); color: #062d17; }
.bottom-cta .btn-secondary { border-color: #526057; background: transparent; color: var(--white); }

/* Interior pages */
.page-hero { padding: 142px 0 66px; border-bottom: 1px solid var(--line); background: #edf3ed; }
.page-hero-grid { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: end; }
.page-hero .display-title { font-size: clamp(42px, 6vw, 68px); }
.page-hero .section-lead { max-width: 700px; }
.page-symbol { width: 150px; height: 150px; display: grid; place-items: center; border: 1px solid #cbd8ce; background: var(--white); font-size: 64px; box-shadow: var(--shadow); }
.faq-tools { display: flex; gap: 12px; margin-bottom: 28px; }
.search-box { flex: 1; height: 48px; padding: 0 16px; border: 1px solid var(--line); border-radius: 6px; background: var(--white); color: var(--ink); }
.search-box:focus { outline: 3px solid rgba(24,169,87,.14); border-color: var(--green); }
.filter-row { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-button { min-height: 38px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); cursor: pointer; }
.filter-button.active { border-color: var(--ink); background: var(--ink); color: var(--white); }
.faq-list { max-width: 900px; }
.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item[hidden] { display: none; }
.faq-question { width: 100%; min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 0; border: 0; background: transparent; text-align: left; font-weight: 760; cursor: pointer; }
.faq-question::after { content: "+"; flex: 0 0 auto; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; font-size: 20px; transition: transform .2s ease; }
.faq-question[aria-expanded="true"]::after { transform: rotate(45deg); }
.faq-answer { max-width: 760px; padding: 0 44px 20px 0; color: var(--muted); }
.faq-answer p { margin: 0; }
.empty-result { display: none; padding: 40px 0; color: var(--muted); }
.empty-result.show { display: block; }

.tutorial-status { display: flex; align-items: center; gap: 14px; padding: 16px 18px; margin-bottom: 30px; border-left: 4px solid var(--yellow); background: #fff6da; }
.tutorial-status strong { display: block; }
.tutorial-status span { color: var(--muted); font-size: 14px; }
.tutorial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tutorial-card { min-width: 0; border: 1px solid var(--line); background: var(--white); }
.video-frame { aspect-ratio: 16 / 9; display: grid; place-items: center; position: relative; overflow: hidden; background: #e6ece7; }
.video-frame::before { content: ""; position: absolute; width: 150px; height: 150px; border: 28px solid #d4ded6; border-radius: 50%; }
.play-symbol { position: relative; z-index: 2; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: var(--white); font-size: 20px; }
.video-time { position: absolute; right: 10px; bottom: 10px; z-index: 2; padding: 2px 7px; border-radius: 4px; background: rgba(23,33,27,.82); color: #fff; font-size: 11px; }
.tutorial-body { padding: 20px; }
.tutorial-body h3 { margin: 10px 0 7px; font-size: 19px; line-height: 1.3; }
.tutorial-body p { margin: 0; color: var(--muted); font-size: 14px; }
.tutorial-card.is-coming .video-frame { cursor: default; }
.tutorial-card.is-coming .play-symbol { background: #758078; }

/* Footer */
.site-footer { padding: 52px 0 28px; border-top: 1px solid var(--line); background: var(--white); }
.footer-main { display: grid; grid-template-columns: 1.35fr repeat(2, .65fr); gap: 48px; padding-bottom: 42px; }
.footer-about p { max-width: 420px; margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.footer-col b { display: block; margin-bottom: 13px; font-size: 13px; }
.footer-col a { display: block; width: fit-content; margin-top: 9px; color: var(--muted); font-size: 14px; }
.footer-col a:hover { color: var(--green-dark); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

.reveal { opacity: 1; transform: none; transition: opacity .55s ease, transform .55s ease; }
.reveal.reveal-pending { opacity: 0; transform: translateY(18px); }
.reveal.reveal-pending.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav-links {
    position: fixed; inset: 70px 0 auto; display: none; padding: 20px 24px 28px;
    background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px rgba(31,55,41,.1);
  }
  .nav-links.open { display: grid; gap: 0; }
  .nav-links a { padding: 13px 0; font-size: 16px; }
  .nav-links a::after { display: none; }
  .nav-actions { margin-left: auto; }
  .icon-button { display: grid; }
  .home-hero { min-height: auto; padding-top: 118px; }
  .home-hero::before { inset: 52% 0 0; border-left: 0; border-top: 1px solid #ccdbcf; }
  .hero-layout { grid-template-columns: 1fr; gap: 34px; }
  .hero-copy { max-width: 700px; }
  .product-scene { min-height: 520px; }
  .steps-grid { gap: 16px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .mode-pane.active { grid-template-columns: 1fr; }
  .mode-content { padding: 36px; }
  .scene-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 290px 230px 230px; }
  .scene-card:first-child { grid-column: 1 / 3; grid-row: auto; }
  .scene-card:first-child .scene-art { width: 190px; height: 190px; }
  .tutorial-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav-row { height: 64px; gap: 10px; }
  .nav-links { top: 64px; }
  .brand-name { font-size: 15px; }
  .brand-mark { width: 29px; height: 29px; }
  .lang-select { min-width: 104px; height: 38px; padding-left: 8px; font-size: 13px; }
  .home-hero { min-height: 760px; padding: 90px 0 20px; align-items: start; }
  .home-hero::before { inset: 52% 0 0; }
  .display-title { font-size: 43px; }
  .hero-desc { margin-top: 16px; font-size: 16px; }
  .hero-actions { margin-top: 22px; }
  .hero-actions .btn { flex: 1 1 160px; }
  .hero-points { gap: 9px 16px; margin-top: 19px; }
  .hero-layout { gap: 24px; }
  .product-scene { min-height: 330px; }
  .wall-panel { width: 310px; max-width: 96%; }
  .wall-switch { width: 112px; height: 154px; padding: 0; border-width: 6px; }
  .product-bot { width: 108px; height: 150px; border-radius: 13px; }
  .bot-arm { width: 15px; height: 100px; right: 7px; top: 16px; }
  .bot-arm::after { width: 24px; height: 16px; }
  .bot-name { font-size: 9px; left: 14px; bottom: 12px; }
  .bot-led { left: 15px; top: 14px; width: 8px; height: 8px; }
  .demo-panel { right: 0; bottom: 0; width: 196px; padding: 12px; }
  .trust-band { padding: 0; }
  .trust-row { grid-template-columns: 1fr; }
  .trust-item { justify-content: flex-start; min-height: 72px; border-right: 0; border-bottom: 1px solid var(--line); }
  .trust-item:last-child { border-bottom: 0; }
  .content-section { padding: 70px 0; }
  .section-head { display: block; margin-bottom: 30px; }
  .section-title { font-size: 34px; }
  .section-lead { font-size: 15px; }
  .steps-grid, .feature-grid { grid-template-columns: 1fr; }
  .step + .step { margin-top: 20px; }
  .feature-item { min-height: 190px; }
  .mode-shell { display: block; }
  .mode-tabs { display: grid; grid-template-columns: 1fr 1fr; border-right: 0; border-bottom: 1px solid var(--line); }
  .mode-tab + .mode-tab { margin: 0 0 0 8px; }
  .mode-tab { padding: 8px; }
  .mode-tab small { display: none; }
  .mode-content { padding: 25px 18px; }
  .mode-pane h3 { font-size: 25px; }
  .connection-visual { height: 350px; }
  .connection-visual app-preview { width: 174px; }
  .connection-node { width: 62px; height: 62px; }
  .scene-grid { display: grid; grid-template-columns: 1fr; grid-template-rows: none; }
  .scene-card, .scene-card:first-child { grid-column: auto; min-height: 220px; }
  .scene-card:first-child { min-height: 290px; }
  .scene-card:first-child .scene-art { width: 145px; height: 170px; }
  .cta-row { display: block; }
  .cta-actions { margin-top: 28px; }
  .cta-actions .btn { flex: 1 1 150px; }
  .page-hero { padding: 116px 0 50px; }
  .page-hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .page-symbol { width: 90px; height: 90px; font-size: 42px; }
  .faq-tools { display: block; }
  .filter-row { margin-top: 12px; }
  .tutorial-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px 20px; }
  .footer-about { grid-column: 1 / 3; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 4px; }
}

@media (max-width: 720px) and (max-height: 740px) {
  .home-hero { min-height: 640px; padding-top: 78px; padding-bottom: 12px; }
  .display-title { font-size: 34px; }
  .hero-desc { font-size: 14px; line-height: 1.55; }
  .hero-points { display: none; }
  .hero-layout { gap: 14px; }
  .product-scene { min-height: 220px; }
  .wall-panel { width: 215px; }
  .wall-switch { width: 82px; height: 108px; padding: 0; border-width: 5px; }
  .product-bot { width: 78px; height: 108px; }
  .bot-arm { width: 12px; height: 72px; top: 12px; }
  .bot-name { display: none; }
  .demo-panel { width: 166px; padding: 9px; }
  .demo-button { min-height: 38px; margin-top: 7px; }
  .demo-status { margin-top: 4px; }
}

@media (max-width: 390px) {
  .brand-name { display: none; }
  .display-title { font-size: 38px; }
  .lang-select { min-width: 96px; }
  .demo-panel { width: 180px; }
}

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