:root {
  color-scheme: dark;
  --ink: #f0f3e7;
  --muted: #8d9687;
  --paper: #10130f;
  --panel: rgba(26, 31, 25, .92);
  --panel-raised: #20261e;
  --line: #353d32;
  --line-soft: rgba(240, 243, 231, .08);
  --signal: #b9ff38;
  --signal-deep: #26370f;
  --warning: #ff9e57;
  --danger: #ff746b;
  --radius: 22px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-family: "Avenir Next Condensed", "DIN Alternate", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--paper); scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); padding-bottom: calc(112px + env(safe-area-inset-bottom)); }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button { font: inherit; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.atmosphere {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 86% 4%, rgba(185, 255, 56, .11), transparent 23rem),
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
  z-index: 0;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: calc(62px + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(16, 19, 15, .78);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(18px) saturate(1.3);
}

.wordmark { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 800; letter-spacing: .13em; }
.mark { width: 15px; height: 15px; border: 2px solid var(--signal); position: relative; transform: rotate(45deg); }
.mark::after { content: ""; position: absolute; inset: 3px; background: var(--signal); }
.header-status { display: flex; align-items: center; gap: 8px; }
.micro-label, .eyebrow { font-size: 9px; line-height: 1; font-weight: 800; letter-spacing: .16em; color: var(--muted); }
.firmware-pill { padding: 6px 8px; border: 1px solid var(--line); border-radius: 999px; font: 700 9px/1 var(--mono); color: var(--muted); }

.shell { position: relative; z-index: 1; width: min(100% - 28px, 1160px); margin: 0 auto; }
.hero { padding: 30px 0 16px; display: grid; gap: 24px; }
.eyebrow { color: var(--signal); margin: 0 0 13px; }
h1 { margin: 0; font-size: clamp(47px, 13.5vw, 66px); line-height: .88; letter-spacing: -.045em; font-weight: 680; }
h1 em { color: transparent; -webkit-text-stroke: 1px var(--ink); font-style: normal; }
.hero-copy > p:last-child { margin: 20px 0 0; max-width: 33rem; color: #b3baad; font-size: 15px; line-height: 1.65; }

.device-card, .panel, .mobile-guide, .compatibility-alert { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); backdrop-filter: blur(15px); }
.device-card { padding: 18px; box-shadow: 0 18px 50px rgba(0,0,0,.18); }
.device-topline { display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 12px; margin-bottom: 16px; }
.device-symbol { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 15px; position: relative; overflow: hidden; }
.device-symbol::before, .device-symbol::after { content: ""; position: absolute; width: 28px; height: 1px; background: #566050; transform-origin: center; }
.device-symbol::before { transform: rotate(36deg); }
.device-symbol::after { transform: rotate(-36deg); }
.device-symbol span { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 16px var(--signal); z-index: 1; }
.device-symbol i { position: absolute; inset: 7px; border: 1px solid #343d30; border-radius: 50%; }
.state-line { display: flex; align-items: center; gap: 9px; margin-top: 6px; }
.state-line strong { font-size: 20px; line-height: 1; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #697166; box-shadow: 0 0 0 5px rgba(105,113,102,.1); }
.status-dot.online { background: var(--signal); box-shadow: 0 0 0 5px rgba(185,255,56,.1), 0 0 18px rgba(185,255,56,.35); }
.status-dot.busy { background: var(--warning); animation: blink .9s steps(2) infinite; }
.connection-type { padding: 7px 9px; border-radius: 999px; background: #2a3127; color: #aab2a4; font: 700 10px/1 var(--mono); }

.button { min-height: 56px; width: 100%; border: 0; border-radius: 15px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 800; }
.button-primary { background: var(--signal); color: #12180b; box-shadow: 0 10px 30px rgba(185,255,56,.12); }
.button-primary:active:not(:disabled) { transform: scale(.985); }
.button:disabled { cursor: default; opacity: .52; }
.button-arrow { width: 29px; height: 29px; display: grid; place-items: center; border-radius: 50%; background: rgba(16,19,15,.12); font-size: 17px; }
.device-note { margin: 12px 2px 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.compatibility-alert { margin: 4px 0 16px; padding: 16px; display: grid; grid-template-columns: 34px 1fr; gap: 12px; border-color: rgba(255,158,87,.42); background: rgba(82,49,27,.4); }
.compatibility-alert[hidden] { display: none; }
.alert-icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--warning); color: #26160b; font: 900 17px/1 var(--mono); }
.compatibility-alert strong { display: block; font-size: 15px; }
.compatibility-alert p { margin: 5px 0 0; color: #e2b28e; font-size: 12px; line-height: 1.5; }

.mobile-guide { margin: 0 0 14px; padding: 14px 8px; display: grid; grid-template-columns: repeat(3, 1fr); }
.mobile-guide > div { min-width: 0; padding: 0 8px; display: flex; align-items: flex-start; gap: 7px; }
.mobile-guide > div + div { border-left: 1px solid var(--line); }
.mobile-guide span { flex: 0 0 19px; width: 19px; height: 19px; display: grid; place-items: center; border: 1px solid #59634f; border-radius: 50%; color: var(--signal); font: 700 9px/1 var(--mono); }
.mobile-guide p { min-width: 0; margin: 1px 0 0; }
.mobile-guide strong, .mobile-guide small { display: block; }
.mobile-guide strong { font-size: 11px; white-space: nowrap; }
.mobile-guide small { margin-top: 3px; color: var(--muted); font-size: 8px; line-height: 1.3; }

.dashboard-grid { display: grid; gap: 14px; }
.panel { padding: 18px; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 17px; }
.section-heading > div:first-child { display: flex; align-items: flex-start; gap: 10px; }
.section-heading h2 { margin: 0; font-size: 20px; line-height: 1; letter-spacing: -.02em; }
.section-heading p { margin: 6px 0 0; color: var(--muted); font-size: 10px; }
.section-index { color: var(--signal); font: 800 10px/1 var(--mono); }
.scan-readout { max-width: 128px; display: flex; justify-content: flex-end; align-items: center; gap: 7px; color: var(--muted); font-size: 9px; line-height: 1.25; text-align: right; }
.scan-light { flex: 0 0 6px; width: 6px; height: 6px; border-radius: 50%; background: #626a5f; }
.scan-light.active { background: var(--signal); animation: blink 1s steps(2) infinite; }

.slot-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.camera-slot { min-width: 0; min-height: 208px; padding: 13px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 17px; background: rgba(12,15,12,.38); transition: border-color .2s, background .2s; }
.camera-slot.active { border-color: rgba(185,255,56,.48); background: rgba(38,55,15,.22); }
.slot-header { display: flex; align-items: center; justify-content: space-between; gap: 5px; }
.slot-number { font: 780 28px/1 var(--mono); letter-spacing: -.09em; color: #626a5f; }
.slot-badge { max-width: 80px; padding: 5px 6px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 8px; line-height: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.camera-slot.active .slot-badge { color: var(--signal); border-color: #52672e; background: var(--signal-deep); }
.slot-body { flex: 1; padding-top: 20px; }
.slot-body h3 { margin: 6px 0 0; font-size: clamp(19px, 5.6vw, 27px); line-height: 1; overflow: hidden; text-overflow: ellipsis; }
.slot-metrics { margin: 0 0 11px; display: flex; gap: 15px; }
.slot-metrics div { display: flex; align-items: baseline; gap: 5px; }
.slot-metrics dt { color: var(--muted); font-size: 9px; }
.slot-metrics dd { margin: 0; font: 700 14px/1 var(--mono); }
.forget-button { min-height: 36px; border: 1px solid var(--line); border-radius: 10px; background: transparent; color: #bac0b5; font-size: 10px; cursor: pointer; }
.forget-button:disabled { color: #555d52; cursor: default; }

.location-panel { min-height: 276px; }
.freshness { padding: 6px 8px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font: 700 8px/1 var(--mono); }
.freshness.fresh { color: var(--signal); border-color: #52672e; background: var(--signal-deep); }
.mode-switch { display: grid; grid-template-columns: 1fr 1fr; padding: 3px; border: 1px solid var(--line); border-radius: 13px; background: rgba(10,12,10,.35); }
.mode-button { min-height: 43px; border: 0; border-radius: 10px; background: transparent; color: var(--muted); cursor: pointer; font-size: 12px; }
.mode-button.active { background: var(--signal); color: #12180b; font-weight: 800; }
.mode-button:disabled { opacity: .46; cursor: default; }
.coordinates { margin-top: 25px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.coordinates > div { min-width: 0; }
.coordinates span { display: block; color: var(--muted); font: 800 9px/1 var(--mono); letter-spacing: .1em; }
.coordinates strong { display: block; margin-top: 8px; overflow: hidden; text-overflow: ellipsis; font: 500 clamp(21px, 6.2vw, 34px)/1 var(--mono); letter-spacing: -.075em; }
.location-note { margin: 17px 0 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.diagnostics { margin-top: 14px; padding: 0; overflow: hidden; }
.diagnostics summary { min-height: 64px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; list-style: none; }
.diagnostics summary::-webkit-details-marker { display: none; }
.diagnostics summary > span:first-child { display: flex; align-items: center; gap: 10px; }
.diagnostics summary strong { font-size: 14px; }
.summary-action { color: var(--signal); font-size: 10px; }
.diagnostics[open] .summary-action { font-size: 0; }
.diagnostics[open] .summary-action::after { content: "收起"; font-size: 10px; }
.diagnostics-body { padding: 0 18px 18px; border-top: 1px solid var(--line); }
.secondary-button { min-height: 46px; width: 100%; margin: 15px 0 5px; border: 1px solid #59634f; border-radius: 12px; background: transparent; color: var(--signal); cursor: pointer; font-size: 12px; }
.secondary-button:disabled { color: #555d52; border-color: var(--line); cursor: default; }
.event-log { max-height: 220px; margin: 10px 0 0; padding: 0; overflow: auto; list-style: none; }
.event-log li { display: grid; grid-template-columns: 66px 1fr; gap: 10px; padding: 10px 0; border-top: 1px solid var(--line-soft); color: #c3c8be; font-size: 11px; line-height: 1.45; }
.event-log time { color: var(--muted); font: 500 9px/1.5 var(--mono); }

footer { padding: 24px 4px 12px; color: #70786d; font-size: 9px; text-align: center; }
footer p { margin: 6px 0; }
.privacy-dot { display: inline-block; width: 6px; height: 6px; margin-right: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 10px rgba(185,255,56,.4); }

.action-dock {
  position: fixed;
  z-index: 30;
  left: 10px;
  right: 10px;
  bottom: calc(10px + env(safe-area-inset-bottom));
  min-height: 78px;
  padding: 9px 9px 9px 15px;
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(240,243,231,.16);
  border-radius: 22px;
  background: rgba(30,36,28,.9);
  box-shadow: 0 18px 55px rgba(0,0,0,.5);
  backdrop-filter: blur(22px) saturate(1.4);
}
.dock-copy span, .dock-copy small { display: block; }
.dock-copy span { color: var(--signal); font: 750 16px/1 var(--mono); }
.dock-copy small { margin-top: 5px; color: var(--muted); font-size: 8px; line-height: 1.2; }
.pair-button { min-width: 0; min-height: 58px; padding: 0 14px; display: flex; align-items: center; gap: 10px; border: 0; border-radius: 15px; background: var(--signal); color: #11170a; cursor: pointer; text-align: left; }
.pair-button:disabled { background: #30372e; color: #767e72; cursor: default; }
.pair-plus { flex: 0 0 29px; width: 29px; height: 29px; display: grid; place-items: center; border-radius: 50%; background: rgba(16,19,15,.12); font-size: 21px; font-weight: 300; }
.pair-button > span:last-child { min-width: 0; }
.pair-button strong, .pair-button small { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pair-button strong { font-size: 14px; }
.pair-button small { margin-top: 3px; opacity: .66; font-size: 8px; }
.pair-button:active:not(:disabled) { transform: scale(.985); }
body[data-connection="online"] .action-dock { border-color: rgba(185,255,56,.35); }

@keyframes blink { 50% { opacity: .35; } }

@media (min-width: 720px) {
  body { padding-bottom: 36px; }
  .app-header { padding-left: max(24px, calc((100vw - 1160px) / 2)); padding-right: max(24px, calc((100vw - 1160px) / 2)); }
  .shell { width: min(100% - 48px, 1160px); }
  .hero { padding: 64px 0 30px; grid-template-columns: 1.35fr .65fr; align-items: end; gap: 70px; }
  h1 { font-size: clamp(70px, 8vw, 108px); }
  .hero-copy > p:last-child { font-size: 17px; }
  .device-card { padding: 22px; }
  .mobile-guide { margin-bottom: 18px; padding: 17px 12px; }
  .mobile-guide > div { justify-content: center; }
  .mobile-guide strong { font-size: 13px; }
  .mobile-guide small { font-size: 10px; }
  .dashboard-grid { grid-template-columns: 1.25fr .75fr; gap: 18px; }
  .panel { padding: 26px; }
  .camera-slot { min-height: 250px; padding: 17px; }
  .slot-body h3 { font-size: 30px; }
  .action-dock { position: sticky; left: auto; right: auto; bottom: 16px; width: min(480px, calc(100% - 32px)); margin: 18px auto 0; }
  .diagnostics { margin-top: 18px; }
}

@media (max-width: 355px) {
  .shell { width: min(100% - 20px, 1160px); }
  .app-header { padding-left: 12px; padding-right: 12px; }
  .header-status .micro-label { display: none; }
  h1 { font-size: 44px; }
  .mobile-guide small { display: none; }
  .panel { padding: 14px; }
  .camera-slot { min-height: 198px; padding: 10px; }
  .slot-metrics { gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}