:root {
  --paper: #121418;
  --surface: #1a1d23;
  --ink: #eef0f6;
  --muted: #acb2c1;
  --line: #333842;
  --accent: #c1ceff;
  --mint: #b4e6d0;
  --rainbow: linear-gradient(105deg, #efb3cd 0%, #f2cca9 22%, #e7dcad 38%, #b4e6d0 55%, #b6d7f0 73%, #c9bdf4 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  color: var(--ink);
  background: var(--paper);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 4px; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { line-height: 1.3; letter-spacing: -.045em; }
ul, ol { margin: 0; padding: 0; }
.shell { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.top-rainbow { height: 4px; background: var(--rainbow); }
.skip-link { position: fixed; z-index: 10; top: 12px; left: 12px; padding: 8px 18px; border: 2px solid var(--accent); background: var(--surface); transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 28px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { width: 48px; height: 48px; border-radius: 13px; }
.brand > span { font-size: 22px; font-weight: 720; letter-spacing: .02em; line-height: 1.3; }
.brand small { display: block; margin-top: 4px; font-size: 9px; letter-spacing: .22em; font-weight: 550; color: var(--muted); }
.site-header nav { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--muted); }
.site-header nav a { padding-block: 10px; }
a:hover { color: var(--accent); }
.eyebrow { font-size: 11px; font-weight: 600; letter-spacing: .13em; color: var(--muted); }
.rainbow-dot { display: inline-block; width: 9px; height: 9px; margin-right: 9px; border-radius: 50%; background: var(--rainbow); }
.hero { display: grid; grid-template-columns: 1.15fr 1fr; align-items: center; gap: 72px; padding-block: 58px 100px; min-height: 720px; }
.hero h1 { margin-top: 25px; font-size: clamp(60px, 6.6vw, 84px); line-height: 1.22; font-weight: 750; letter-spacing: -.07em; }
.rainbow-text { color: #c1ceff; background: var(--rainbow); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-description { margin-top: 27px; font-size: 21px; line-height: 1.8; color: #d4d8e2; }
.hero-detail { margin-top: 18px; font-size: 15px; color: var(--muted); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; min-height: 50px; padding: 12px 21px; font-size: 14px; font-weight: 650; border-radius: 13px; }
.primary { background: var(--rainbow); color: #20232a; }
.primary:hover { color: #101216; filter: brightness(1.06); }
.text-link { display: inline-flex; align-items: center; gap: 12px; font-size: 13px; font-weight: 600; color: var(--accent); }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.compatibility { margin-top: 16px; font-size: 11px; color: var(--muted); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 22px; list-style: none; margin-top: 27px; font-size: 12px; color: var(--muted); }
.hero-facts li::before { content: '✓'; color: var(--mint); margin-right: 7px; }
.hero-visual { position: relative; isolation: isolate; display: grid; justify-items: center; padding: 32px 10px 24px; }
.ambient-glow { position: absolute; z-index: -1; inset: 0; overflow: hidden; pointer-events: none; }
.ambient-glow::before { content: ''; position: absolute; width: 94%; height: 83%; left: 3%; top: 4%; background: conic-gradient(from 25deg, #cec1ff20, #a4d6ed20, #b4e6d018, #e8bfcb1a, #cec1ff20); border-radius: 50%; filter: blur(35px); }
.control-demo { width: min(330px, 100%); border: 1px solid #3c414d; border-radius: 30px; padding: 25px; background: linear-gradient(145deg, #23262e, #181b21); box-shadow: 0 26px 70px #0005, 0 1px 0 #ffffff10 inset; }
.demo-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 16px; font-weight: 650; }
.demo-top small { display: block; color: var(--muted); font-size: 9px; font-weight: 500; margin-top: 2px; letter-spacing: .03em; }
.demo-step { color: var(--mint); font-size: 10px; background: #2c3335; padding: 7px 10px; border-radius: 20px; white-space: nowrap; }
.demo-number { font-size: 68px; font-weight: 700; letter-spacing: -.07em; line-height: 1.2; font-variant-numeric: tabular-nums; color: #c3dbe8; margin-top: 23px; }
.demo-number span { font-size: 32px; margin-left: 3px; }
.demo-route { color: var(--muted); font-size: 11px; margin-top: 8px; }
.demo-panel { border: 1px solid #353b46; border-radius: 12px; padding: 15px; margin-top: 22px; background: #20242d; }
.demo-row { display: flex; justify-content: space-between; font-size: 11px; color: #d9dce7; }
.demo-row span:last-child { color: var(--accent); }
.demo-track { height: 5px; background: #444a56; border-radius: 4px; margin-block: 22px; }
.demo-track span { display: block; position: relative; width: 12%; height: 100%; background: #b3cbec; border-radius: inherit; }
.demo-track span::after { content: ''; position: absolute; right: -8px; top: -5px; width: 15px; height: 15px; border-radius: 50%; background: #e3e9f3; box-shadow: 0 1px 6px #0005; }
.demo-brightness { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 10px; border-top: 1px solid #353b46; padding-top: 14px; }
.demo-brightness i { height: 4px; flex: 1; border-radius: 4px; background: linear-gradient(to right, var(--mint) 20%, #444a56 20%); }
.demo-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.demo-buttons > span { display: flex; align-items: center; justify-content: center; flex-direction: column; background: #252a34; border: 1px solid #39414e; border-radius: 10px; font-size: 26px; height: 60px; color: #bdcde9; }
.demo-buttons .demo-keypad { font-size: 16px; font-variant-numeric: tabular-nums; color: var(--mint); }
.demo-keypad small { font-size: 9px; margin-top: 2px; color: var(--muted); }
.demo-presets { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; font-size: 12px; }
.demo-presets > span { background: #272c35; border: 1px solid #39414b; border-radius: 10px; padding: 12px; }
.demo-presets small { display: block; font-size: 10px; color: var(--muted); margin-top: 3px; }
.demo-presets .chosen { background: #b4dfcb; color: #1c3029; border-color: #b4dfcb; }
.demo-presets .chosen small { color: #355446; }
.hero-visual figcaption { margin-top: 22px; font-size: 10px; color: var(--muted); text-align: center; }
.workflow { border-top: 1px solid var(--line); padding-block: 68px 72px; }
.section-heading h2 { font-size: clamp(29px, 3.6vw, 40px); line-height: 1.45; margin-top: 17px; font-weight: 650; }
.section-heading > p:last-child { max-width: 670px; margin-top: 18px; font-size: 15px; line-height: 1.95; color: var(--muted); }
.mobile-break { display: none; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-top: 45px; list-style: none; }
.steps li { border-top: 2px solid #7b748c; padding-top: 22px; }
.steps li:nth-child(2) { border-color: #6b8581; }
.steps li:nth-child(3) { border-color: #907f77; }
.step-number { color: #b1a8c7; font-size: 12px; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 22px; font-weight: 650; margin-top: 17px; }
.steps p { font-size: 14px; color: var(--muted); margin-top: 14px; line-height: 1.95; }
.step-tag { display: inline-block; font-size: 11px; color: #bbc4d5; margin-top: 19px; }
.precision-note { font-size: 12px; color: var(--muted); margin-top: 36px; max-width: 930px; }
.precision-note strong { font-weight: 600; color: #c8cdd9; }
.quiet-strip { display: flex; align-items: center; gap: 24px; padding: 29px 34px; background: #1c2026; border: 1px solid var(--line); border-radius: 20px; }
.quiet-mark { display: grid; place-items: center; flex-shrink: 0; width: 58px; height: 58px; color: var(--mint); border: 1px solid #4b5b58; border-radius: 17px; font-size: 42px; line-height: 1; }
.quiet-strip h2 { font-size: 23px; font-weight: 650; margin-top: 6px; }
.quiet-strip p:not(.eyebrow) { font-size: 13px; color: var(--muted); margin-top: 8px; }
.quiet-strip > a { margin-left: auto; flex-shrink: 0; }
.plans { padding-block: 80px 65px; }
.plan-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 36px; }
.plan-card { padding: 32px 35px; border: 1px solid var(--line); background: #1a1d23; border-radius: 22px; }
.plan-name { font-size: 16px; color: #c7ccd9; font-weight: 650; }
.plan-card h3 { font-size: clamp(25px, 2.6vw, 32px); line-height: 1.4; font-weight: 650; margin-top: 20px; }
.plan-summary { font-size: 13px; color: var(--muted); padding-bottom: 23px; border-bottom: 1px solid var(--line); margin-top: 11px; }
.plan-card ul { list-style: none; display: grid; gap: 13px; font-size: 14px; color: #c0c6d2; margin-top: 24px; }
.plan-card li::before { content: '✓'; margin-right: 10px; color: #a8c2b8; }
.plan-card strong { font-weight: 650; color: #e4e8f1; }
.pro-card { position: relative; overflow: hidden; background: linear-gradient(140deg, #272631, #1c2329); border-color: #4a4659; }
.pro-card::before { content: ''; position: absolute; inset: 0 0 auto; height: 3px; background: var(--rainbow); }
.plan-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.plan-badge { font-size: 10px; color: #d4c9ef; background: #393244; padding: 3px 9px; border-radius: 6px; white-space: nowrap; }
.plan-note { margin-top: 23px; max-width: 950px; color: var(--muted); font-size: 12px; line-height: 1.95; }
.plan-note a { color: var(--accent); white-space: nowrap; }
.closing { text-align: center; padding-block: 33px 85px; }
.closing h2 { font-size: clamp(28px, 3.6vw, 38px); font-weight: 650; line-height: 1.5; margin-block: 16px 25px; }
.closing > p:last-child { font-size: 11px; color: var(--muted); margin-top: 17px; }
.site-footer { display: grid; grid-template-columns: 1fr auto; gap: 27px; border-top: 1px solid var(--line); padding-block: 34px 30px; }
.footer-title { font-size: 15px; font-weight: 650; }
.site-footer p { margin-top: 7px; font-size: 12px; color: var(--muted); }
.site-footer nav { display: flex; align-items: start; flex-wrap: wrap; gap: 20px; font-size: 12px; color: var(--muted); padding-top: 4px; }
.footer-legal { grid-column: 1/-1; display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 10px; color: var(--muted); }
.document { max-width: 850px; padding-block: 52px 90px; }
.document-heading { padding-bottom: 34px; border-bottom: 1px solid var(--line); }
.document-heading h1 { margin-top: 19px; font-size: 44px; font-weight: 700; }
.document-heading > p:not(.eyebrow) { font-size: 14px; color: var(--muted); margin-top: 18px; }
.document-heading > .text-link { margin-top: 18px; }
.document-body { font-size: 15px; color: #bcc3d0; line-height: 1.95; padding-top: 33px; }
.document-body .lead { font-size: 16px; color: #e0e4ec; }
.document-body h2 { color: var(--ink); font-size: 23px; line-height: 1.5; font-weight: 650; margin: 35px 0 13px; }
.document-body h3 { color: var(--ink); font-size: 18px; line-height: 1.5; margin: 27px 0 11px; }
.document-body p + p { margin-top: 13px; }
.document-body a:not(.button) { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; overflow-wrap: anywhere; }
.document-body hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.document-body section[lang=en] { font-size: 14px; line-height: 1.9; }
.quick-start { border: 1px solid var(--line); border-radius: 18px; background: var(--surface); padding: 27px 30px; }
.quick-start h2 { margin: 0 0 18px; }
.quick-start ol { padding-left: 22px; }
.quick-start li { padding-left: 4px; margin-bottom: 9px; }
.faq { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); padding: 20px 0; }
summary { color: var(--ink); font-size: 16px; font-weight: 600; cursor: pointer; margin-left: 18px; padding-right: 8px; list-style-position: outside; }
details p { font-size: 14px; color: var(--muted); line-height: 1.95; margin-top: 15px; }
.contact-box { margin-top: 44px; border: 1px solid #494557; border-radius: 20px; padding: 30px; background: #24232d; }
.contact-box h2 { margin: 9px 0 13px; font-size: 26px; }
.contact-box .button { margin-top: 22px; overflow-wrap: anywhere; }
.small { margin-top: 22px!important; font-size: 12px!important; line-height: 1.9!important; color: var(--muted); }
@media(max-width: 1000px) {
  .hero { gap: 25px; }
  .hero h1 { font-size: clamp(48px, 6.6vw, 68px); }
  .hero-description { font-size: 19px; }
  .quiet-strip { gap: 19px; padding: 26px; }
  .quiet-strip h2 { font-size: 21px; }
  .quiet-strip { display: grid; grid-template-columns: 58px minmax(0, 1fr); }
  .quiet-strip > div { min-width: 0; }
  .quiet-strip > a { grid-column: 2; margin-left: 0; }
}
@media(max-width: 760px) {
  .shell { width: calc(100% - 40px); }
  .site-header { padding-block: 21px; gap: 16px; }
  .brand img { width: 39px; height: 39px; border-radius: 11px; }
  .brand > span { font-size: 20px; }
  .brand small { font-size: 8px; }
  .site-header nav { gap: 16px; font-size: 12px; }
  .hero { grid-template-columns: 1fr; gap: 28px; padding-block: 38px 55px; min-height: 0; }
  .hero h1 { font-size: clamp(56px, 10.5vw, 72px); }
  .hero-description { font-size: 20px; margin-top: 23px; }
  .hero-detail { font-size: 14px; }
  .hero-actions { gap: 18px; }
  .hero-visual { width: min(430px, 100%); margin-inline: auto; padding: 26px 10px 0; }
  .control-demo { width: min(310px, 100%); }
  .hero-facts { gap: 18px; font-size: 11px; margin-top: 23px; }
  .workflow { padding-block: 50px 53px; }
  .section-heading h2 { font-size: 29px; }
  .section-heading > p:last-child { font-size: 14px; }
  .steps { grid-template-columns: 1fr; gap: 29px; margin-top: 32px; }
  .steps li { display: grid; grid-template-columns: 35px 1fr; gap: 0 10px; }
  .step-number { grid-column: 1; grid-row: 1/4; margin-top: 5px; }
  .steps h3 { grid-column: 2; margin: 0; font-size: 22px; }
  .steps p { grid-column: 2; margin-top: 11px; }
  .step-tag { grid-column: 2; margin-top: 13px; }
  .precision-note { font-size: 11px; margin-top: 28px; }
  .quiet-strip { grid-template-columns: 42px minmax(0, 1fr); padding: 24px 20px; gap: 17px; border-radius: 18px; align-items: start; }
  .quiet-mark { width: 42px; height: 42px; border-radius: 13px; font-size: 32px; }
  .quiet-strip h2 { font-size: 18px; line-height: 1.5; }
  .quiet-strip p:not(.eyebrow) { font-size: 12px; }
  .plans { padding-block: 53px 45px; }
  .plan-grid { grid-template-columns: 1fr; gap: 20px; margin-top: 28px; }
  .plan-card { padding: 27px 28px; }
  .plan-card h3 { font-size: 28px; }
  .plan-note { font-size: 11px; }
  .closing { padding-block: 21px 55px; }
  .closing h2 { font-size: 28px; }
  .site-footer { grid-template-columns: 1fr; gap: 20px; padding-block: 28px; }
  .site-footer nav { gap: 18px; }
  .footer-legal { gap: 8px 15px; }
  .document { padding-block: 34px 55px; }
  .document-heading h1 { font-size: 35px; }
  .document-heading > p:not(.eyebrow) { font-size: 13px; }
  .document-body { font-size: 14px; padding-top: 26px; }
  .document-body .lead { font-size: 15px; }
  .document-body h2 { font-size: 21px; }
  .quick-start, .contact-box { padding: 23px; }
}
@media(max-width: 380px) {
  .site-header { flex-wrap: wrap; gap: 7px; }
  .site-header nav { width: 100%; justify-content: space-between; font-size: 12px; gap: 10px; }
  .hero { padding-top: 27px; }
  .hero h1 { font-size: 54px; }
  .hero-description { font-size: 18px; }
  .hero-actions { gap: 17px; }
  .button { font-size: 13px; padding: 12px 17px; gap: 17px; }
  .hero-facts { gap: 13px; font-size: 10px; }
  .control-demo { padding: 21px; }
  .demo-number { font-size: 60px; }
  .plan-card { padding: 25px 22px; }
  .document-heading h1 { font-size: 31px; }
  .contact-box { padding: 20px; }
}
@media(prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media(forced-colors: active) { .rainbow-text { background: none; -webkit-text-fill-color: currentColor; } .primary { border: 1px solid ButtonText; } }