/* =====================================================================
   GeekHuang Lab — style.css
   Direction 1.5 · Spec Sheet & Blueprint Grid × Monolithic Studio
   ---------------------------------------------------------------------
   1. Tokens (edit colors here)
   2. Base
   3. Layout primitives
   4. Background grid
   5. Navbar
   6. Hero + spec plate
   7. Section heads
   8. Status
   8b. Command Palette
   9. Services
   10. Experiments
   11. Notes
   12. About
   13. Footer
   14. Motion
   ===================================================================== */

/* ---------- 1. TOKENS ---------- */
:root {
  /* Surfaces */
  --bg:          #070B14;
  --bg-2:        #0B1020;
  --surface:     #0D131F;
  --surface-2:   #111928;
  --line:        rgba(255, 255, 255, 0.07);
  --line-2:      rgba(255, 255, 255, 0.12);
  --line-3:      rgba(255, 255, 255, 0.20);
  --grid-line:   rgba(148, 178, 222, 0.045);
  --grid-major:  rgba(148, 178, 222, 0.075);

  /* Text */
  --text:        #E7EBF3;
  --text-2:      #9AA4B8;
  --text-3:      #5F6A80;

  /* Accents */
  --cyan:        #38BDF8;
  --cyan-soft:   rgba(56, 189, 248, 0.14);
  --violet:      #A78BFA;
  --violet-soft: rgba(167, 139, 250, 0.14);

  /* States (low-saturation) */
  --ok:          #6CC49A;
  --warn:        #D9B26A;
  --down:        #E07A7A;
  --idle:        #5F6A80;

  /* Type */
  --font-sans: "Inter", "Geist", "SF Pro Display", -apple-system, BlinkMacSystemFont,
               "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Geist Mono", "IBM Plex Mono", "SF Mono", ui-monospace,
               Menlo, Consolas, monospace;

  /* Geometry */
  --radius:    10px;
  --radius-sm: 6px;
  --gutter:    clamp(16px, 4vw, 48px);
  --container: 1760px;
  --nav-h:     64px;

  /* Motion */
  --ease:      cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast:    180ms;
  --t-mid:     240ms;

  /* Glow */
  --glow:      0 22px 48px -24px rgba(56, 189, 248, 0.38), 0 0 0 1px rgba(56, 189, 248, 0.10);

  color-scheme: dark;
}

[data-theme="light"] {
  --bg:          #F3F5F9;
  --bg-2:        #EAEEF5;
  --surface:     #FFFFFF;
  --surface-2:   #F7F9FC;
  --line:        rgba(11, 16, 32, 0.08);
  --line-2:      rgba(11, 16, 32, 0.14);
  --line-3:      rgba(11, 16, 32, 0.24);
  --grid-line:   rgba(30, 64, 120, 0.05);
  --grid-major:  rgba(30, 64, 120, 0.085);

  --text:        #0B1020;
  --text-2:      #4A556B;
  --text-3:      #8590A5;

  --cyan:        #0284C7;
  --cyan-soft:   rgba(2, 132, 199, 0.10);
  --violet:      #7C5CE0;
  --violet-soft: rgba(124, 92, 224, 0.10);

  --ok:          #2F8F63;
  --warn:        #B7862E;
  --down:        #C24D4D;
  --idle:        #98A2B5;

  --glow:        0 22px 44px -26px rgba(2, 80, 140, 0.35), 0 0 0 1px rgba(2, 132, 199, 0.12);

  color-scheme: light;
}

/* ---------- 2. BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.35vw + 14px, 17px);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color var(--t-mid) var(--ease), color var(--t-mid) var(--ease);
}

h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }

.mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-feature-settings: "zero" 1;
}

.icon { width: 16px; height: 16px; flex: none; }

::selection { background: var(--cyan-soft); color: var(--text); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 100;
  padding: 10px 14px;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  transform: translateY(-150%);
  transition: transform var(--t-fast) var(--ease);
}
.skip-link:focus { transform: none; }

.noscript { padding: 24px var(--gutter); color: var(--text-2); }
.noscript a { color: var(--cyan); }

/* ---------- 3. LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { position: relative; padding-block: clamp(64px, 9vw, 128px) 0; }
.section:last-of-type { padding-bottom: clamp(80px, 10vw, 140px); }

.section-intro {
  max-width: 44ch;
  margin: -8px 0 32px;
  color: var(--text-2);
}

/* Dots & tones */
.dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--idle);
  flex: none;
}
.dot--ok     { background: var(--ok);     box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 16%, transparent); }
.dot--warn   { background: var(--warn); }
.dot--down   { background: var(--down); }
.dot--idle   { background: transparent; box-shadow: inset 0 0 0 1.5px var(--idle); }
.dot--cyan   { background: var(--cyan); }
.dot--violet { background: var(--violet); }

.tone-ok     { color: var(--ok); }
.tone-warn   { color: var(--warn); }
.tone-down   { color: var(--down); }
.tone-idle   { color: var(--text-3); }
.tone-cyan   { color: var(--cyan); }
.tone-violet { color: var(--violet); }

/* Corner markers (blueprint registration marks) */
.corner {
  position: absolute;
  width: 9px; height: 9px;
  border-color: var(--line-3);
  border-style: solid;
  border-width: 0;
  pointer-events: none;
  transition: border-color var(--t-mid) var(--ease);
}
.corner--tl { top: -1px;    left: -1px;  border-top-width: 1px;    border-left-width: 1px; }
.corner--tr { top: -1px;    right: -1px; border-top-width: 1px;    border-right-width: 1px; }
.corner--bl { bottom: -1px; left: -1px;  border-bottom-width: 1px; border-left-width: 1px; }
.corner--br { bottom: -1px; right: -1px; border-bottom-width: 1px; border-right-width: 1px; }

/* ---------- 4. BACKGROUND GRID ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 256px 256px, 256px 256px, 32px 32px, 32px 32px;
  background-position: -1px -1px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 78%);
          mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 78%);
  animation: grid-drift 90s linear infinite;
}
@keyframes grid-drift {
  to { background-position: 255px 255px, 255px 255px, 31px 31px, 31px 31px; }
}

/* ---------- 5. NAVBAR ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
          backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--line); }

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand__mark { width: 28px; height: 28px; color: var(--cyan); }
.brand__mark .mark-tile { fill: var(--bg-2); stroke: var(--line-2); }
.brand__mark .mark-dot  { fill: var(--violet); }
.brand__name { font-size: 15px; }
.brand__lab  { color: var(--text-3); font-weight: 500; }

.nav__menu { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 14px;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.nav__list a:hover { color: var(--text); background: var(--line); }
.nav__status { font-family: var(--font-mono); font-size: 12px !important; letter-spacing: 0.06em; text-transform: uppercase; }

.nav__actions { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.icon-btn:hover { color: var(--text); border-color: var(--line-2); }
.icon-btn .icon { width: 18px; height: 18px; }
.icon--sun { display: none; }
[data-theme="light"] .icon--sun  { display: block; }
[data-theme="light"] .icon--moon { display: none; }

.nav__burger { display: none; }
.burger { position: relative; width: 16px; height: 10px; }
.burger span {
  position: absolute; left: 0; right: 0; height: 1.5px;
  background: currentColor; border-radius: 1px;
  transition: transform var(--t-mid) var(--ease), top var(--t-mid) var(--ease);
}
.burger span:first-child { top: 0; }
.burger span:last-child  { top: 8.5px; }
.nav-open .burger span:first-child { top: 4.25px; transform: rotate(45deg); }
.nav-open .burger span:last-child  { top: 4.25px; transform: rotate(-45deg); }

/* Mobile menu */
@media (max-width: 767px) {
  .nav__burger { display: inline-grid; }
  .nav__actions { margin-left: auto; }
  .nav__menu {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    margin: 0;
    height: calc(100vh - var(--nav-h));
    height: calc(100dvh - var(--nav-h));
    padding: 12px var(--gutter) 32px;
    background: var(--bg);
    border-top: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease), visibility 0s linear var(--t-mid);
  }
  .nav-open .nav__menu {
    opacity: 1; visibility: visible; transform: none;
    transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
  }
  .nav-open { overflow: hidden; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__list a {
    display: flex;
    justify-content: flex-start;
    min-height: 60px;
    padding: 0 4px;
    border-radius: 0;
    border-bottom: 1px solid var(--line);
    font-size: 20px;
    color: var(--text);
  }
  .nav__list a:hover { background: transparent; }
  .nav__status { font-size: 14px !important; }
}

/* ---------- 6. HERO ---------- */
.hero {
  position: relative;
  padding-block: clamp(72px, 12vw, 176px) clamp(48px, 7vw, 96px);
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -20% 0 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(40% 50% at 18% 30%, var(--cyan-soft), transparent 70%),
    radial-gradient(30% 40% at 80% 20%, var(--violet-soft), transparent 70%);
  opacity: 0.55;
}

.hero__inner {
  display: grid;
  gap: clamp(48px, 6vw, 80px);
  align-items: end;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-3);
  margin-bottom: clamp(20px, 3vw, 32px);
}
.eyebrow__rule { width: 48px; height: 1px; background: var(--line-3); }

.hero__title {
  font-size: clamp(44px, 7.4vw, 132px);
  line-height: 0.95;
  font-weight: 600;
  letter-spacing: -0.045em;
  margin-left: -0.04em;
}

.hero__slogan {
  margin-top: clamp(16px, 2vw, 24px);
  font-size: clamp(18px, 1.6vw, 24px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-2);
}
.hero__slogan .sep { color: var(--cyan); padding-inline: 0.2em; }

.hero__lead {
  margin-top: clamp(28px, 4vw, 48px);
  font-size: clamp(18px, 1.4vw, 22px);
  color: var(--text);
}
.hero__body {
  margin-top: 8px;
  max-width: 34em;
  color: var(--text-2);
}
.br-md { display: none; }

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(32px, 4vw, 48px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  font-size: 15px;
  font-weight: 500;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.btn .icon { transition: transform var(--t-fast) var(--ease); }
.btn:hover .icon { transform: translate(2px, -2px); }

.btn--primary {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}
.btn--primary:hover { box-shadow: var(--glow); transform: translateY(-1px); }

.btn--ghost { background: transparent; color: var(--text); }
.btn--ghost:hover { border-color: var(--line-3); background: var(--line); }

@media (max-width: 559px) {
  .hero__cta .btn { flex: 1 1 100%; min-height: 52px; }
}

/* Spec plate */
.spec-plate {
  position: relative;
  width: 100%;
  max-width: 440px;
  padding: 20px 22px 18px;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.spec-plate__head {
  display: flex;
  justify-content: space-between;
  padding-bottom: 14px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
  color: var(--text-3);
}
.spec-plate__id { color: var(--cyan); }

.spec-list > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.spec-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.spec-list dd {
  font-size: 14px;
  color: var(--text);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.spec-list time { font-family: var(--font-mono); font-size: 13px; }

.spec-plate__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  color: var(--text-3);
}
.ticks {
  flex: 1;
  max-width: 120px;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--line-3) 0 1px, transparent 1px 6px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000);
          mask-image: linear-gradient(90deg, transparent, #000);
}

@media (min-width: 768px) {
  .br-md { display: inline; }
}
@media (min-width: 1024px) {
  .hero__inner { grid-template-columns: minmax(0, 1.5fr) minmax(320px, 1fr); }
  .spec-plate { justify-self: end; }
}

/* ---------- 7. SECTION HEADS ---------- */
.section-head {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  column-gap: 16px;
  margin-bottom: 32px;
}
.section-head__index { color: var(--cyan); }
.section-head__title {
  font-family: var(--font-mono);
  font-size: clamp(13px, 0.4vw + 11px, 15px);
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--text);
}
.section-head__rule {
  height: 9px;
  border-bottom: 1px solid var(--line);
  background: repeating-linear-gradient(90deg, var(--line-2) 0 1px, transparent 1px 48px) bottom / 100% 5px no-repeat;
}
.section-head__meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
}

@media (max-width: 559px) {
  .section-head { grid-template-columns: auto 1fr; row-gap: 8px; }
  .section-head__rule { display: none; }
  .section-head__meta { grid-column: 1 / -1; }
}

/* ---------- 8. STATUS ---------- */
.section--status { padding-top: 0; }

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (min-width: 600px) {
  .status-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .status-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}
/* 5th card spans full width on 2-col phones when alone on last row */
@media (max-width: 599px) {
  .status-grid .status-card:nth-child(5):last-child {
    grid-column: 1 / -1;
  }
}

.status-card {
  position: relative;
  padding: clamp(16px, 2vw, 24px);
  background: var(--surface);
}
.status-card__label { color: var(--text-3); }
.status-card__n { color: var(--cyan); }
.status-card__value {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  font-size: clamp(16px, 1.35vw, 22px);
  font-weight: 600;
  letter-spacing: -0.01em;
  word-break: break-word;
}
.status-card__sub { margin-top: 6px; color: var(--text-3); font-size: 0.66rem; }
.status-card__bar {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ok), transparent 70%);
  opacity: 0.35;
}
.status-card[data-state="warn"] .status-card__bar { background: linear-gradient(90deg, var(--warn), transparent 70%); }
.status-card[data-state="down"] .status-card__bar { background: linear-gradient(90deg, var(--down), transparent 70%); }

/* ---------- 8b. COMMAND PALETTE + LAUNCH ---------- */
.cmd-launch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 10px 0 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  cursor: pointer;
  font: inherit;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.cmd-launch:hover {
  color: var(--text);
  border-color: var(--line-2);
  background: var(--surface-2);
}
.cmd-launch .icon { width: 16px; height: 16px; flex-shrink: 0; }
.cmd-launch__label {
  font-size: 13px;
  color: var(--text-3);
}
.cmd-launch__kbd {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 6px;
  margin-left: 2px;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--text-3);
  background: var(--bg-2);
}
@media (max-width: 767px) {
  .cmd-launch__label,
  .cmd-launch__kbd { display: none; }
  .cmd-launch {
    width: 40px;
    padding: 0;
    justify-content: center;
  }
}

body.cmd-open { overflow: hidden; }

.cmd[hidden] { display: none !important; }
.cmd {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: start center;
  padding: max(12vh, 48px) var(--gutter) 24px;
}
.cmd__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 11, 20, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
[data-theme="light"] .cmd__backdrop {
  background: rgba(243, 245, 249, 0.62);
}
.cmd__panel {
  position: relative;
  width: min(640px, 100%);
  max-height: min(72vh, 560px);
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: calc(var(--radius) + 2px);
  box-shadow:
    0 0 0 1px rgba(56, 189, 248, 0.08),
    0 28px 64px -28px rgba(0, 0, 0, 0.55),
    0 0 80px -40px rgba(167, 139, 250, 0.25);
  overflow: hidden;
}
.cmd__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.cmd__mark {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding: 4px 7px;
  border: 1px solid var(--cyan-soft);
  border-radius: 4px;
  background: var(--cyan-soft);
}
.cmd__input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.cmd__input::placeholder { color: var(--text-3); }
.cmd__esc {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-3);
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  background: var(--bg-2);
}
.cmd__list {
  list-style: none;
  margin: 0;
  padding: 8px;
  overflow-y: auto;
  flex: 1;
  min-height: 120px;
}
.cmd__empty {
  padding: 28px 12px;
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
}
.cmd__item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.cmd__item:hover,
.cmd__item.is-active {
  background: var(--cyan-soft);
  border-color: rgba(56, 189, 248, 0.22);
}
[data-theme="light"] .cmd__item:hover,
[data-theme="light"] .cmd__item.is-active {
  background: var(--cyan-soft);
  border-color: rgba(2, 132, 199, 0.22);
}
.cmd__cat {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--violet);
}
.cmd__body { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.cmd__name {
  font-size: 14px;
  font-weight: 560;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cmd__desc {
  font-size: 12px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cmd__hint {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease);
}
.cmd__item.is-active .cmd__hint,
.cmd__item:hover .cmd__hint { opacity: 1; }
.cmd__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  color: var(--text-3);
  font-size: 10px;
  letter-spacing: 0.06em;
}
.cmd__foot kbd {
  display: inline-block;
  min-width: 1.4em;
  padding: 1px 5px;
  margin-right: 4px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  background: var(--bg-2);
  font: inherit;
  text-align: center;
}
@media (max-width: 559px) {
  .cmd { padding-top: max(8vh, 24px); }
  .cmd__item {
    grid-template-columns: 72px minmax(0, 1fr);
  }
  .cmd__hint { display: none; }
}



/* ---------- 9. SERVICES ---------- */
.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 560px)  { .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 768px)  { .service-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .service-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; } }
@media (min-width: 1280px) { .service-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
@media (min-width: 1600px) { .service-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); } }

.service-grid > li { display: flex; }

.svc {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 240px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  isolation: isolate;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}
.svc::after {                                  /* soft ambient glow, revealed on hover */
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background:
    radial-gradient(120% 70% at 0% 0%, var(--cyan-soft), transparent 60%),
    radial-gradient(90% 60% at 100% 100%, var(--violet-soft), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease);
}
.svc .corner { border-color: transparent; }

a.svc:hover,
a.svc:focus-visible {
  transform: translateY(-4px);
  border-color: var(--line-3);
  box-shadow: var(--glow);
}
a.svc:hover::after,
a.svc:focus-visible::after { opacity: 1; }
a.svc:hover .corner,
a.svc:focus-visible .corner { border-color: var(--cyan); }
a.svc:focus-visible { outline-offset: 2px; border-radius: var(--radius); }

.svc__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.64rem;
  color: var(--text-3);
}
.svc__code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.svc__state { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.svc__state .dot { width: 6px; height: 6px; }

.svc__body { flex: 1; padding-top: 24px; }
.svc__icon {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  color: var(--cyan);
  background: var(--bg-2);
}
.svc__icon .icon { width: 20px; height: 20px; }
.svc__logo { display: block; width: 20px; height: 20px; }
.svc__name {
  margin-top: 16px;
  font-size: clamp(18px, 0.4vw + 16px, 20px);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}
.svc__host {
  margin-top: 4px;
  font-size: 0.64rem;
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--text-3);
}
.svc__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.svc__foot {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.62rem;
}
.svc__metric { display: flex; flex-direction: column; gap: 2px; }
.svc__k { color: var(--text-3); }
.svc__v { color: var(--text); font-size: 0.72rem; font-variant-numeric: tabular-nums; }
.svc__open {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text);
  font-size: 0.68rem;
}
.svc__open--muted { color: var(--text-3); }
.svc__arrow { width: 14px; height: 14px; color: var(--cyan); transition: transform var(--t-fast) var(--ease); }
a.svc:hover .svc__arrow { transform: translate(2px, -2px); }

/* Planned / experimental cards: blueprint-draft look */
.svc--muted {
  background: transparent;
  border-style: dashed;
  border-color: var(--line-2);
}
.svc--muted .svc__icon { color: var(--text-3); background: transparent; border-style: dashed; }
.svc--muted .svc__name { color: var(--text-2); }
.svc--muted .svc__desc { color: var(--text-3); }
.svc--muted .svc__v { color: var(--text-3); }

@media (max-width: 559px) {
  .svc { min-height: 0; padding: 18px; }
  .svc__body { display: grid; grid-template-columns: auto 1fr; column-gap: 14px; align-items: center; padding-top: 18px; }
  .svc__icon { grid-row: span 2; }
  .svc__name { margin-top: 0; }
  .svc__host { grid-column: 2; }
  .svc__desc { grid-column: 1 / -1; }
  .svc__foot { min-height: 44px; align-items: center; }
}

/* ---------- 10. EXPERIMENTS ---------- */
.experiment-list { border-top: 1px solid var(--line); }

.exp {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 8px 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.exp__n { color: var(--cyan); padding-top: 6px; }
.exp__title {
  font-size: clamp(18px, 1vw + 12px, 24px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.exp__desc { margin-top: 6px; color: var(--text-2); max-width: 52ch; }
.exp__link { display: inline-flex; align-items: center; gap: 8px; transition: color var(--t-fast) var(--ease); }
.exp__link:hover { color: var(--cyan); }
.exp__link .exp__arrow { color: var(--cyan); }
.exp__tags { grid-column: 2; color: var(--text-3); }
.exp__tags .sep { color: var(--line-3); }
.exp .pill { grid-column: 2; justify-self: start; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-size: 0.64rem;
  white-space: nowrap;
}
.pill .dot { width: 6px; height: 6px; }

@media (min-width: 768px) {
  .exp {
    grid-template-columns: 64px minmax(0, 1fr) minmax(160px, 220px) 140px;
    align-items: start;
    padding: 32px 0;
  }
  .exp__tags, .exp .pill { grid-column: auto; padding-top: 8px; }
  .exp .pill { justify-self: end; padding-top: 0; margin-top: 2px; }
}

/* ---------- 11. NOTES ---------- */
.notes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 768px)  { .notes-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .notes-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1440px) { .notes-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
.notes-grid > li { display: flex; }

.note {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 220px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), transparent);
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.note:hover, .note:focus-visible { border-color: var(--line-3); transform: translateY(-3px); }
.note__meta { display: flex; justify-content: space-between; gap: 12px; color: var(--text-3); font-size: 0.64rem; }
.note__cat { color: var(--violet); }
.note__title {
  margin-top: 20px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.note__excerpt { margin-top: 8px; flex: 1; font-size: 14px; color: var(--text-2); }
.note__more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 20px;
  color: var(--text-2);
  font-size: 0.66rem;
}
.note__arrow { width: 14px; height: 14px; color: var(--cyan); transition: transform var(--t-fast) var(--ease); }
.note:hover .note__more { color: var(--text); }
.note:hover .note__arrow { transform: translate(2px, -2px); }

/* ---------- 12. ABOUT ---------- */
.about {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
  padding: clamp(20px, 3vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(55% 70% at 100% 0%, var(--violet-soft), transparent 70%),
    var(--surface);
  align-items: start;
}

/* Photo — 4:5 portrait, blueprint frame */
.about__photo {
  margin: 0;
  display: grid;
  gap: 10px;
  justify-items: start;
  max-width: 280px;
  width: 100%;
}
.about__photo-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}
.about__photo-frame::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed var(--line);
  border-radius: 2px;
  pointer-events: none;
  z-index: 1;
}
.about__photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}
.about__photo-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.about__photo-meta span:nth-child(2) { color: var(--cyan); }

/* Personal info */
.about__info {
  min-width: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}
.about__kicker {
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.14em;
}
.about__name {
  margin: 0;
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.1;
  color: var(--text);
}
.about__roles {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: -0.01em;
}
.about__text {
  margin-top: 10px;
  display: grid;
  gap: 8px;
  color: var(--text-2);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.7;
  max-width: 42ch;
}
.about__lead {
  margin: 0;
  color: var(--text);
  font-size: clamp(17px, 1.2vw, 20px);
  font-weight: 500;
  line-height: 1.5;
}

/* WeChat contact card — spec-plate language */
.about__contact {
  position: relative;
  width: 100%;
  max-width: 280px;
  justify-self: start;
  padding: 18px 18px 16px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: 2px;
  display: grid;
  gap: 14px;
  justify-items: center;
  text-align: center;
}
.about__contact-tag {
  width: 100%;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--text-3);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-align: left;
}
.about__qr {
  width: min(148px, 56vw);
  aspect-ratio: 1;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
}
.about__qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.about__contact-cta {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}
.about__contact-helper {
  margin: 0;
  color: var(--text-3);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

/* Tablet: photo | info; contact under info */
@media (min-width: 768px) {
  .about {
    grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
    gap: clamp(28px, 3vw, 40px);
  }
  .about__photo { max-width: none; }
  .about__contact {
    grid-column: 2;
    justify-self: start;
    max-width: 260px;
  }
}

/* Desktop: photo | info | contact */
@media (min-width: 1024px) {
  .about {
    grid-template-columns: minmax(200px, 260px) minmax(0, 1fr) minmax(220px, 280px);
    align-items: stretch;
  }
  .about__contact {
    grid-column: auto;
    justify-self: stretch;
    max-width: none;
    align-content: start;
  }
  .about__info { align-content: center; }
}

/* ---------- 13. FOOTER ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding-block: 40px calc(40px + env(safe-area-inset-bottom));
}
.footer__inner {
  display: grid;
  gap: 28px;
}
.footer__slogan { margin-top: 10px; color: var(--text-3); text-transform: none; }
.footer__links { display: flex; flex-wrap: wrap; gap: 4px 24px; }
.footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-2);
  font-size: 14px;
  transition: color var(--t-fast) var(--ease);
}
.footer__links a:hover { color: var(--text); }
.footer__meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--text-3); }
.footer__sig { color: var(--text-3); }

@media (min-width: 768px) {
  .footer__inner { grid-template-columns: 1fr auto; align-items: center; }
  .footer__meta { grid-column: 1 / -1; padding-top: 24px; border-top: 1px dashed var(--line); }
}

/* ---------- 14. MOTION ---------- */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(14px);
}
.js-reveal .reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 640ms var(--ease), transform 640ms var(--ease);
  transition-delay: calc(var(--i, 0) * 60ms);
}
/* Hero stagger (static order) */
.hero .reveal:nth-child(1) { --i: 0; }
.hero .reveal:nth-child(2) { --i: 1; }
.hero .reveal:nth-child(3) { --i: 2; }
.hero .reveal:nth-child(4) { --i: 3; }
.hero .reveal:nth-child(5) { --i: 4; }
.hero .reveal:nth-child(6) { --i: 5; }
.hero .spec-plate.reveal   { --i: 5; }

.live { animation: breathe 2.8s ease-in-out infinite; }
@keyframes breathe { 50% { opacity: 0.45; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}