/* ============================================================
   UNITMATRIX // 一元矩阵 — v3 styles
   GitHub-inspired: deep navy + warm amber accent + cool blue +
   aurora orbs + IDE chrome + activity grid
   ============================================================ */

:root {
  /* Color — deep navy, warm white, amber primary, cool blue secondary */
  --bg:           #0B0E14;
  --bg-2:         #0E121C;
  --surface:      #13182A;
  --surface-2:    #1A2138;
  --border:       #21283D;
  --border-strong:#2E3854;
  --text:         #E6E1D5;       /* warm off-white, easy on eyes */
  --text-dim:     #B0B4C2;
  --muted:        #6B7184;
  --muted-2:      #454B5E;
  --accent:       #F0883E;       /* warm amber — primary */
  --accent-soft:  rgba(240, 136, 62, 0.14);
  --accent-2:     #79C0FF;       /* cool blue — secondary */
  --accent-3:     #BB7FF2;       /* soft violet — aurora only */
  --accent-success:#3FB950;       /* used very sparingly */

  /* Fonts */
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-sans: "Manrope", "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-cn-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "JetBrains Mono", monospace;

  /* Type scale */
  --fs-mega:    clamp(56px, 11vw, 168px);
  --fs-display: clamp(40px, 7vw, 96px);
  --fs-h2:      clamp(28px, 4vw, 56px);
  --fs-body:    16px;
  --fs-mono:    13px;
  --fs-mono-sm: 11px;

  /* Spatial */
  --gap-1: 8px;  --gap-2: 16px; --gap-3: 24px; --gap-4: 32px;
  --gap-6: 48px; --gap-8: 64px; --gap-12: 96px; --gap-16: 128px;

  /* Layout */
  --maxw: 1280px;
  --pad-x: clamp(20px, 4vw, 64px);
  --nav-h: 64px;
  --status-h: 28px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ============================================================
   RESET / BASE
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  padding-bottom: var(--status-h);
  position: relative;
}

/* Subtle film grain — much softer than v2 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.7 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--bg); }

/* ============================================================
   AURORA — fixed bg orbs + grid overlay
   ============================================================ */

.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  will-change: transform;
}
.orb-1 {
  width: 760px; height: 760px;
  top: -200px; left: -150px;
  background: radial-gradient(circle, rgba(240,136,62,0.55), rgba(240,136,62,0) 70%);
  animation: drift-1 22s ease-in-out infinite alternate;
}
.orb-2 {
  width: 640px; height: 640px;
  top: -100px; right: -120px;
  background: radial-gradient(circle, rgba(187,127,242,0.5), rgba(187,127,242,0) 70%);
  animation: drift-2 26s ease-in-out infinite alternate;
}
.orb-3 {
  width: 520px; height: 520px;
  top: 40%; left: 50%;
  transform: translate(-50%, 0);
  background: radial-gradient(circle, rgba(121,192,255,0.42), rgba(121,192,255,0) 70%);
  animation: drift-3 30s ease-in-out infinite alternate;
}
.orb-4 {
  width: 420px; height: 420px;
  top: 70%; left: 70%;
  background: radial-gradient(circle, rgba(240,136,62,0.32), rgba(240,136,62,0) 70%);
  animation: drift-4 24s ease-in-out infinite alternate;
}
@keyframes drift-1 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(80px, 60px) scale(1.1); }
}
@keyframes drift-2 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-60px, 40px) scale(1.05); }
}
@keyframes drift-3 {
  0%   { transform: translate(-50%, 0) scale(1); }
  100% { transform: translate(-45%, -40px) scale(1.15); }
}
@keyframes drift-4 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-40px, -30px) scale(0.95); }
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* Reduce orb intensity once below the fold */
@media (max-width: 768px) {
  .orb-1, .orb-2 { filter: blur(60px); opacity: 0.35; }
  .orb-3, .orb-4 { display: none; }
}

/* ============================================================
   BOOT SEQUENCE
   ============================================================ */

#boot {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: clamp(24px, 6vw, 80px);
  padding-top: clamp(24px, 10vh, 120px);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  transition: opacity 600ms var(--ease);
}
#boot.hidden { opacity: 0; pointer-events: none; }
.boot-inner { max-width: 720px; width: 100%; position: relative; }
.boot-log {
  margin: 0;
  white-space: pre;
  font-family: var(--font-mono);
  color: var(--text);
  line-height: 1.7;
}
.boot-log .ok { color: var(--accent); }
.boot-cursor {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent);
  animation: blink 1s steps(1) infinite;
  font-family: var(--font-mono);
}
@keyframes blink { 50% { opacity: 0; } }
.boot-skip {
  position: absolute;
  bottom: -40px;
  left: 0;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============================================================
   NAV
   ============================================================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad-x);
  background: rgba(11, 14, 20, 0.86);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: geometricPrecision;
  /* avoid sub-pixel transforms that blur text */
  transform: translateZ(0);
  will-change: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  line-height: 1;
  letter-spacing: 0.04em;
  position: relative;
  z-index: 2;
}
.brand-logo {
  width: 28px;
  height: 28px;
  display: block;
  transition: transform 480ms var(--ease), filter 240ms var(--ease);
  filter: drop-shadow(0 0 8px rgba(240,136,62,0.25));
}
.brand:hover .brand-logo {
  transform: rotate(45deg);
  filter: drop-shadow(0 0 14px rgba(240,136,62,0.55));
}
.brand-mono {
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
}
.brand-mono::after {
  content: "_";
  color: var(--accent);
  margin-left: 2px;
  animation: blink 1.1s steps(1) infinite;
}
.brand-cn {
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-cn-display);
  font-weight: 800;
  margin-left: 12px;
  padding-left: 12px;
  letter-spacing: 0.18em;
  align-self: center;
  border-left: 1px solid var(--border-strong);
  line-height: 1;
}

.nav-links {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  gap: var(--gap-4);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 600;
  pointer-events: auto;
  z-index: 1;
}
.nav-links a {
  color: var(--text-dim);
  position: relative;
  padding: 4px 2px;
  transition: color 200ms var(--ease);
  -webkit-font-smoothing: antialiased;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 280ms var(--ease);
}
.nav-links a:hover::before { transform: scaleX(1); }

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--gap-3);
  font-size: var(--fs-mono-sm);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border: 1px solid var(--border-strong);
  background: rgba(11, 14, 20, 0.5);
}
.lang-switch button {
  background: transparent;
  border: none;
  padding: 2px 4px;
  cursor: pointer;
  color: var(--muted);
  font-family: inherit;
  font-size: inherit;
  transition: color 180ms var(--ease);
}
.lang-switch button:hover { color: var(--text); }
.lang-switch button.is-active { color: var(--accent); font-weight: 700; }
.lang-sep { color: var(--muted-2); font-size: 11px; }

.live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}
.live-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-success);
  box-shadow: 0 0 8px var(--accent-success), 0 0 0 0 rgba(63,185,80,0.6);
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 8px var(--accent-success), 0 0 0 0 rgba(63,185,80,0.55); }
  70%  { box-shadow: 0 0 8px var(--accent-success), 0 0 0 9px rgba(63,185,80,0); }
  100% { box-shadow: 0 0 8px var(--accent-success), 0 0 0 0 rgba(63,185,80,0); }
}
.live-text { color: var(--accent-success); font-weight: 500; }
.live-time { color: var(--muted); }

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.12em;
  background: var(--accent-soft);
  transition: all 240ms var(--ease);
}
.btn-cta:hover {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 28px rgba(240,136,62,0.35);
}
.btn-cta .btn-arrow { transition: transform 240ms var(--ease); }
.btn-cta:hover .btn-arrow { transform: translateX(4px); }

@media (max-width: 1024px) { .nav-links { display: none; } }
@media (max-width: 720px) {
  .live-time, .live-text { display: none; }
  .brand-cn { display: none; }
}

/* ============================================================
   HERO — centered, with floating cards & IDE card below
   ============================================================ */

.hero {
  position: relative;
  padding: calc(var(--nav-h) + var(--gap-2)) var(--pad-x) var(--gap-12);
  max-width: var(--maxw);
  margin: 0 auto;
}
.hero-inner {
  position: relative;
  text-align: center;
  padding: var(--gap-3) 0 var(--gap-6);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(13, 18, 28, 0.6);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  color: var(--text-dim);
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
  margin-bottom: var(--gap-4);
  opacity: 0;
  animation: fade-up 700ms var(--ease) 1900ms forwards;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.hero-title {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-mega);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--text);
}
html[lang="zh-CN"] .hero-title {
  font-family: var(--font-cn-display);
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 0.98;
}
html[lang="zh-CN"] .hero-word { margin-right: 0.06em; }

.hero-line {
  display: block;
  white-space: nowrap;
  will-change: transform;
}
.hero-line--accent .hero-word {
  background: linear-gradient(120deg, var(--accent) 0%, #FFB37A 45%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-word {
  display: inline-block;
  margin-right: 0.16em;
  opacity: 0;
  transform: translateY(40px);
  animation: hero-reveal 800ms var(--ease) forwards;
}
.hero-line:nth-child(1) .hero-word:nth-child(1) { animation-delay: 1900ms; }
.hero-line:nth-child(1) .hero-word:nth-child(2) { animation-delay: 2050ms; }
.hero-line:nth-child(2) .hero-word:nth-child(1) { animation-delay: 2200ms; }
.cursor-blink {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  margin-left: 6px;
  animation: blink 1s steps(1) infinite;
}
@keyframes hero-reveal { to { opacity: 1; transform: none; } }

.hero-tagline {
  margin: var(--gap-4) auto 0;
  max-width: 640px;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.4vw, 16px);
  color: var(--accent);
  letter-spacing: 0.08em;
  opacity: 0;
  animation: fade-up 800ms var(--ease) 2400ms forwards;
}
html[lang="zh-CN"] .hero-tagline {
  font-family: var(--font-sans);
  font-weight: 500;
}
html[lang="en"] .hero-tagline { display: none; }

.hero-desc {
  margin: var(--gap-3) auto 0;
  max-width: 580px;
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--text-dim);
  line-height: 1.6;
  opacity: 0;
  animation: fade-up 800ms var(--ease) 2550ms forwards;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

.hero-actions {
  margin-top: var(--gap-6);
  display: flex;
  gap: var(--gap-3);
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fade-up 800ms var(--ease) 2700ms forwards;
}

.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  font-weight: 700;
  border: 1px solid var(--accent);
  transition: all 240ms var(--ease);
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  box-shadow: 0 0 0 4px var(--accent-soft), 0 12px 36px rgba(240,136,62,0.3);
  transform: translateY(-2px);
}
.btn-primary-arrow { transition: transform 240ms var(--ease); }
.btn-primary:hover .btn-primary-arrow { transform: translateX(6px); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* Hero features — horizontal chip row, centered under desc */
.hero-features {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: var(--gap-4);
  padding: 8px 18px;
  border: 1px solid var(--border);
  background: rgba(13, 18, 28, 0.55);
  backdrop-filter: blur(10px);
  border-radius: 999px;
  opacity: 0;
  animation: fade-up 800ms var(--ease) 2900ms forwards;
}
.feat-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  cursor: default;
  transition: color 220ms var(--ease), transform 220ms var(--ease);
}
.feat-chip:hover { color: var(--text); transform: translateY(-1px); }
.feat-icon {
  font-size: 15px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(240, 136, 62, 0.12);
  color: var(--accent);
  transition: transform 360ms var(--ease), background 220ms var(--ease);
}
.feat-chip:hover .feat-icon { transform: rotate(180deg) scale(1.08); }
.feat-chip[data-tone="blue"]   .feat-icon { color: var(--accent-2); background: rgba(121, 192, 255, 0.12); }
.feat-chip[data-tone="violet"] .feat-icon { color: var(--accent-3); background: rgba(187, 127, 242, 0.12); }
.feat-sep {
  font-family: var(--font-mono);
  color: var(--muted-2);
  font-size: 14px;
  user-select: none;
}
@media (max-width: 720px) {
  .hero-features { gap: 8px; padding: 6px 12px; border-radius: 14px; }
  .feat-chip { font-size: 11px; gap: 6px; }
  .feat-icon { width: 18px; height: 18px; font-size: 12px; }
  .feat-sep { display: none; }
}

/* IDE-style code window */
.ide-card {
  position: relative;
  margin: var(--gap-12) auto 0;
  max-width: 880px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(180deg, var(--surface), var(--bg));
  box-shadow:
    0 30px 80px rgba(0,0,0,0.5),
    0 0 0 1px rgba(240, 136, 62, 0.08),
    0 0 60px rgba(240, 136, 62, 0.12);
  border-radius: 8px;
  overflow: hidden;
  opacity: 0;
  animation: fade-up 1000ms var(--ease) 3500ms forwards;
}
.ide-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.ide-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.ide-dot--r { background: #FF5F57; }
.ide-dot--y { background: #FEBC2E; }
.ide-dot--g { background: #28C840; }
.ide-tab {
  margin-left: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.ide-body {
  padding: var(--gap-3) 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  background: var(--bg);
}
.ide-line {
  display: block;
  padding: 0 var(--gap-4);
  color: var(--text);
  white-space: pre;
  position: relative;
}
.ide-line--hl {
  background: rgba(240, 136, 62, 0.06);
  box-shadow: inset 2px 0 0 var(--accent);
}
.ide-num {
  display: inline-block;
  width: 30px;
  margin-right: 18px;
  color: var(--muted-2);
  text-align: right;
  user-select: none;
}
.ide-tk-key  { color: var(--accent-3); }
.ide-tk-id   { color: var(--accent-2); }
.ide-tk-str  { color: #A6E22E; }       /* one tasteful green allowed */
.ide-tk-prop { color: var(--accent); }
.ide-tk-fn   { color: #FFD580; }
.ide-tk-num  { color: var(--accent); }
.ide-tk-comm { color: var(--muted); font-style: italic; }
.ide-tk-caret {
  display: inline-block;
  margin-left: 4px;
  color: var(--accent);
  animation: blink 1s steps(1) infinite;
}
@media (max-width: 640px) {
  .ide-body { font-size: 12px; }
  .ide-line { padding: 0 var(--gap-2); }
  .ide-num  { width: 22px; margin-right: 10px; }
}

/* ============================================================
   MARQUEE
   ============================================================ */

.marquee {
  border-block: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, var(--bg-2) 50%, transparent);
  padding: 22px 0;
  overflow: hidden;
  position: relative;
}
.marquee::before, .marquee::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 140px;
  z-index: 2;
  pointer-events: none;
}
.marquee::before { left: 0;  background: linear-gradient(to right, var(--bg), transparent); }
.marquee::after  { right: 0; background: linear-gradient(to left, var(--bg), transparent); }
.marquee-track {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  letter-spacing: 0.04em;
  color: var(--text);
  animation: marquee 38s linear infinite;
}
.marquee-track span { display: inline-block; }
.marquee-dot { color: var(--accent); font-size: 0.7em; opacity: 0.7; }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============================================================
   SECTION COMMON
   ============================================================ */

.section {
  position: relative;
  padding: var(--gap-16) var(--pad-x);
  max-width: var(--maxw);
  margin: 0 auto;
}
.section--alt {
  background: linear-gradient(180deg, transparent, rgba(14, 18, 28, 0.7) 18%, rgba(14, 18, 28, 0.7) 82%, transparent);
  max-width: none;
  border-block: 1px solid var(--border);
}
.section--alt > * { max-width: var(--maxw); margin-inline: auto; }

.section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--gap-3);
  align-items: baseline;
  margin-bottom: var(--gap-8);
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--border);
}
.section-id {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.section-title {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
  color: var(--text);
}
html[lang="zh-CN"] .section-title {
  font-family: var(--font-cn-display);
  font-weight: 900;
}
.section-meta {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: var(--fs-mono-sm);
  letter-spacing: 0.04em;
}
@media (max-width: 640px) {
  .section { padding: var(--gap-12) var(--pad-x); }
  .section-head { grid-template-columns: auto 1fr; }
  .section-meta { grid-column: 2; font-size: 10px; }
}

/* ============================================================
   [001] CAPABILITIES
   ============================================================ */

.cap-list { list-style: none; margin: 0; padding: 0; }
.cap-row {
  display: grid;
  grid-template-columns: 50px 1.2fr 2fr 1.1fr 28px;
  gap: var(--gap-3);
  align-items: center;
  padding: var(--gap-3) var(--gap-2);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
  position: relative;
  transition: all 220ms var(--ease);
}
.cap-row:first-child { border-top: 1px solid var(--border); }
.cap-row::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 240ms var(--ease);
}
.cap-row:hover {
  background: rgba(240,136,62,0.04);
  color: var(--text);
  padding-left: calc(var(--gap-2) + 6px);
}
.cap-row:hover::before { transform: scaleY(1); }
.cap-num { color: var(--muted); font-weight: 600; }
.cap-name { color: var(--text); font-weight: 600; }
.cap-row:hover .cap-name { color: var(--accent); }
.cap-ext { color: var(--muted-2); font-weight: 400; }
.cap-desc {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-dim);
}
.cap-tags { font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }
.cap-arrow {
  color: var(--muted-2);
  text-align: right;
  font-size: 16px;
  transition: all 240ms var(--ease);
}
.cap-row:hover .cap-arrow {
  color: var(--accent);
  transform: translateX(6px);
}
@media (max-width: 1024px) {
  .cap-row {
    grid-template-columns: 36px 1fr 28px;
    grid-template-rows: auto auto auto;
    row-gap: 4px;
  }
  .cap-num   { grid-row: 1 / span 3; }
  .cap-name  { grid-column: 2; }
  .cap-desc  { grid-column: 2; }
  .cap-tags  { grid-column: 2; }
  .cap-arrow { grid-row: 1 / span 3; align-self: center; }
}

/* ============================================================
   [002] WORK
   ============================================================ */

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-3);
}
@media (max-width: 768px) { .work-grid { grid-template-columns: 1fr; } }

.work-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: var(--gap-3);
  display: flex;
  flex-direction: column;
  gap: var(--gap-2);
  transition: all 280ms var(--ease);
  cursor: pointer;
  overflow: hidden;
  border-radius: 4px;
}
.work-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 0 4px var(--accent-soft);
}

.work-thumb {
  height: 220px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  overflow: hidden;
  font-family: var(--font-mono);
  color: rgba(11,14,20,0.85);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  border-radius: 2px;
}
.work-thumb-label { position: relative; z-index: 2; }
.work-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #F0883E 0%, #C46B26 60%, #5D3010 100%);
  z-index: 0;
}
.work-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(transparent 95%, rgba(0,0,0,0.18) 95%),
    linear-gradient(90deg, transparent 95%, rgba(0,0,0,0.18) 95%);
  background-size: 24px 24px;
  z-index: 1;
}
.work-card[data-tone="blue"]   .work-thumb::before { background: linear-gradient(135deg, #79C0FF 0%, #2C7CD9 60%, #0E2C5C 100%); }
.work-card[data-tone="violet"] .work-thumb::before { background: linear-gradient(135deg, #BB7FF2 0%, #7E4ECC 60%, #2D175C 100%); }
.work-card[data-tone="rose"]   .work-thumb::before { background: linear-gradient(135deg, #FF8AB8 0%, #C2528A 60%, #4A1530 100%); }
.work-card[data-tone="teal"]   .work-thumb::before { background: linear-gradient(135deg, #5CE0C7 0%, #2C8A7A 60%, #0F3C36 100%); }
.work-card[data-tone="ochre"]  .work-thumb::before { background: linear-gradient(135deg, #E8C46B 0%, #B0823C 60%, #4A2E10 100%); }
.work-card[data-tone="emerald"] .work-thumb::before { background: linear-gradient(135deg, #6BE89A 0%, #2C9C5E 60%, #0F3D26 100%); }
.work-card[data-tone="magenta"] .work-thumb::before { background: linear-gradient(135deg, #FF7AC8 0%, #C2389A 60%, #4A1340 100%); }

/* Real screenshot thumbnails (case 7/8) */
.work-card[data-thumb] .work-thumb {
  background: var(--bg) center/cover no-repeat;
}
.work-card[data-thumb="gmg"]   .work-thumb { background-image: url("assets/case-gmg.png"); }
.work-card[data-thumb="shs"]   .work-thumb { background-image: url("assets/case-shs.png"); }
.work-card[data-thumb="joy"]   .work-thumb { background-image: url("assets/case-joy.png"); }
.work-card[data-thumb="antao"] .work-thumb { background-image: url("assets/case-antao.png"); }
.work-card[data-thumb] .work-thumb::before {
  background: linear-gradient(180deg, rgba(11,14,20,0.05) 0%, rgba(11,14,20,0.55) 70%, rgba(11,14,20,0.92) 100%);
}
.work-card[data-thumb] .work-thumb::after {
  background-image:
    linear-gradient(transparent 95%, rgba(255,255,255,0.06) 95%),
    linear-gradient(90deg, transparent 95%, rgba(255,255,255,0.06) 95%);
}
.work-card[data-thumb] .work-thumb-label {
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
  font-size: 18px;
  letter-spacing: 0.06em;
}

.work-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.work-num { color: var(--accent); font-weight: 600; }

.work-title {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2vw, 26px);
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color 220ms var(--ease);
}
html[lang="zh-CN"] .work-title { font-family: var(--font-cn-display); font-weight: 800; }
.work-card:hover .work-title { color: var(--accent); }

.work-result {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-dim);
  line-height: 1.55;
  font-size: 15px;
}

.work-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.work-tags span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 4px 8px;
  border: 1px solid var(--border-strong);
  color: var(--muted);
  border-radius: 2px;
}

.work-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-top: auto;
  padding-top: var(--gap-2);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  transition: color 220ms var(--ease);
}
.work-link span { transition: transform 220ms var(--ease); }
.work-card:hover .work-link { color: var(--accent); }
.work-card:hover .work-link span { transform: translateX(4px); }

/* ============================================================
   [003] CLIENTS LOGO WALL
   ============================================================ */

.logo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
@media (max-width: 1024px) { .logo-wall { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 640px)  { .logo-wall { grid-template-columns: repeat(3, 1fr); } }

.logo-tile {
  aspect-ratio: 1.4 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(19, 24, 42, 0.5);
  transition: all 220ms var(--ease);
  position: relative;
  padding: 12px;
  text-align: center;
}
.logo-tile::before {
  content: "·";
  position: absolute;
  top: 8px; left: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--muted-2);
}
.logo-tile-cn {
  font-family: var(--font-cn-display);
  font-weight: 800;
  font-size: clamp(14px, 1.5vw, 18px);
  letter-spacing: 0.06em;
  color: var(--text);
}
.logo-tile-en {
  font-family: var(--font-mono);
  font-size: clamp(9px, 1vw, 11px);
  letter-spacing: 0.18em;
  color: var(--muted);
}
html[lang="en"] .logo-tile-cn { display: none; }
html[lang="en"] .logo-tile-en { font-size: clamp(13px, 1.4vw, 17px); color: var(--text-dim); }
.logo-tile:hover {
  background: rgba(240,136,62,0.06);
}
.logo-tile:hover .logo-tile-cn { color: var(--accent); }
.logo-tile:hover .logo-tile-en { color: var(--accent); }

.logo-note {
  margin-top: var(--gap-3);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

/* ============================================================
   [004] PROCESS / GANTT
   ============================================================ */

.gantt {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  padding: var(--gap-4);
  border: 1px solid var(--border);
  background: rgba(19, 24, 42, 0.6);
  backdrop-filter: blur(8px);
  border-radius: 4px;
}
.gantt-axis {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-bottom: var(--gap-2);
  border-bottom: 1px dashed var(--border-strong);
}
.gantt-row {
  display: grid;
  grid-template-columns: 1fr 2.2fr;
  gap: var(--gap-3);
  align-items: center;
}
.gantt-bar {
  position: relative;
  height: 40px;
  margin-left: var(--start);
  width: var(--width);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  font-family: var(--font-mono);
  color: var(--bg);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  border-radius: 2px;
}
.gantt-bar--1 { background: linear-gradient(90deg, #FFB37A, #F0883E); }
.gantt-bar--2 { background: linear-gradient(90deg, #F0883E, #E07020); }
.gantt-bar--3 { background: linear-gradient(90deg, #E07020, #C25510); }
.gantt-bar--4 { background: linear-gradient(90deg, #C25510, #903C0A); }
.gantt-bar::after {
  content: "";
  position: absolute;
  right: -8px; top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-left: 8px solid currentColor;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}
.gantt-step { color: var(--bg); opacity: 0.7; }
.gantt-name { font-weight: 800; }
.gantt-desc {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.55;
}
@media (max-width: 768px) {
  .gantt-row { grid-template-columns: 1fr; gap: 8px; }
  .gantt-bar { margin-left: 0 !important; width: 100% !important; }
}

/* ============================================================
   [005] METRICS + ACTIVITY GRID
   ============================================================ */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  margin-bottom: var(--gap-8);
  border-radius: 4px;
  overflow: hidden;
}
@media (max-width: 1024px) { .metrics-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .metrics-grid { grid-template-columns: 1fr; } }

.metric {
  padding: var(--gap-4);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(19, 24, 42, 0.5);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.metric::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-100%);
  transition: transform 600ms var(--ease);
}
.metric:hover::before { transform: translateX(100%); }
.metric:last-child { border-right: none; }
.metric-value {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(48px, 6vw, 84px);
  line-height: 0.95;
  background: linear-gradient(180deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.04em;
}
.metric-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
}
.metric-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* Activity grid (GitHub contribution-graph style) */
.activity-block {
  margin-bottom: var(--gap-8);
  padding: var(--gap-4);
  border: 1px solid var(--border);
  background: rgba(19, 24, 42, 0.5);
  border-radius: 4px;
}
.activity-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--gap-3);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.activity-title { letter-spacing: 0.06em; color: var(--text-dim); }
.activity-legend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  letter-spacing: 0.08em;
}
.legend-cell, .activity-cell {
  width: 12px; height: 12px;
  border-radius: 2px;
  background: var(--border);
}
.legend-cell[data-lvl="1"], .activity-cell[data-lvl="1"] { background: rgba(240,136,62,0.18); }
.legend-cell[data-lvl="2"], .activity-cell[data-lvl="2"] { background: rgba(240,136,62,0.4); }
.legend-cell[data-lvl="3"], .activity-cell[data-lvl="3"] { background: rgba(240,136,62,0.7); }
.legend-cell[data-lvl="4"], .activity-cell[data-lvl="4"] { background: var(--accent); }
.activity-grid {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  grid-auto-flow: column;
  grid-auto-columns: 12px;
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.activity-cell {
  transition: transform 160ms var(--ease);
}
.activity-cell:hover { transform: scale(1.4); background: var(--accent); }

.about-text {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-dim);
}
.about-text strong { color: var(--accent); font-weight: 600; }

/* ============================================================
   [006] CONTACT
   ============================================================ */

.contact-block {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  padding: var(--gap-6) var(--gap-4);
  border: 1px solid var(--border);
  background: rgba(19, 24, 42, 0.6);
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  border-radius: 4px;
}
.contact-prompt {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--gap-3);
  align-items: baseline;
  font-size: 14px;
}
.contact-cmd { color: var(--accent); letter-spacing: 0.04em; }
.contact-email {
  color: var(--text);
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 600;
  border-bottom: 1px dashed var(--accent);
  transition: all 200ms var(--ease);
}
.contact-email:hover { color: var(--accent); }
.contact-handle { color: var(--text-dim); }

/* WeChat contact — clickable, opens QR modal */
.contact-wechat {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: transparent;
  border: 1px dashed var(--border-strong);
  padding: 6px 12px;
  font: inherit;
  color: var(--text);
  cursor: pointer;
  border-radius: 4px;
  transition: all 200ms var(--ease);
  text-align: left;
}
.contact-wechat:hover {
  border-color: var(--accent);
  background: rgba(240,136,62,0.06);
  color: var(--accent);
}
.contact-wechat-mini {
  display: inline-flex;
  width: 26px; height: 26px;
  border-radius: 3px;
  overflow: hidden;
  background: #fff;
  padding: 2px;
  transition: transform 200ms var(--ease);
}
.contact-wechat-mini img { width: 100%; height: 100%; object-fit: contain; display: block; }
.contact-wechat:hover .contact-wechat-mini { transform: scale(1.05); }
.contact-wechat-cta {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 200ms var(--ease);
}
.contact-wechat:hover .contact-wechat-cta { color: var(--accent); }
@media (max-width: 480px) {
  .contact-wechat { flex-wrap: wrap; gap: 8px; }
  .contact-wechat-cta { width: 100%; }
}
@media (max-width: 640px) {
  .contact-prompt { grid-template-columns: 1fr; gap: 4px; }
}

.cta-mega {
  margin-top: var(--gap-4);
  padding: var(--gap-4);
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: 0.06em;
  transition: all 240ms var(--ease);
  position: relative;
  overflow: hidden;
  border-radius: 4px;
}
.cta-mega::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg);
  transform: translateX(-100%);
  transition: transform 320ms var(--ease);
  z-index: 0;
}
.cta-mega:hover::before { transform: translateX(0); }
.cta-mega:hover { color: var(--accent); }
.cta-mega-line, .cta-mega-arrow { position: relative; z-index: 1; }
.cta-mega-arrow { transition: transform 320ms var(--ease); }
.cta-mega:hover .cta-mega-arrow { transform: translateX(10px); }

/* ============================================================
   FOOTER
   ============================================================ */

.foot {
  padding: var(--gap-6) var(--pad-x) calc(var(--gap-6) + var(--status-h));
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.foot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  letter-spacing: 0.06em;
}
.foot-row a { color: var(--text-dim); }
.foot-row a:hover { color: var(--accent); }
.foot-sep { color: var(--muted-2); }
.foot-row--mono { font-size: 10px; color: var(--muted-2); }

/* ============================================================
   STATUS BAR
   ============================================================ */

.status-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--status-h);
  background: #060810;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--pad-x);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  z-index: 40;
  letter-spacing: 0.06em;
}
.status-bar .status-mode {
  background: var(--accent);
  color: var(--bg);
  padding: 2px 8px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.status-sep { color: var(--muted-2); }
.status-hint kbd {
  font-family: var(--font-mono);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: 1px 6px;
  font-size: 10px;
  color: var(--accent);
}
@media (max-width: 640px) {
  .status-hint { display: none; }
}

/* ============================================================
   KEYBOARD HELP MODAL
   ============================================================ */

.kb-help {
  position: fixed;
  inset: 0;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease);
}
.kb-help.is-open { opacity: 1; pointer-events: auto; }
.kb-help-inner {
  width: min(420px, 90vw);
  background: var(--surface);
  border: 1px solid var(--accent);
  padding: var(--gap-3);
  font-family: var(--font-mono);
  box-shadow: 0 0 80px rgba(240,136,62,0.18);
  border-radius: 6px;
}
.kb-help-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--gap-3);
  padding-bottom: var(--gap-2);
  border-bottom: 1px dashed var(--border-strong);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.kb-close {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  width: 26px; height: 26px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 18px;
  transition: all 200ms var(--ease);
}
.kb-close:hover { border-color: var(--accent); color: var(--accent); }
.kb-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
  color: var(--text-dim);
}
.kb-list li {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  align-items: center;
}
.kb-list kbd {
  font-family: var(--font-mono);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  padding: 3px 10px;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: inline-block;
  border-radius: 3px;
}

/* ============================================================
   QR MODAL — Antao mini-program
   ============================================================ */

.qr-modal {
  position: fixed;
  inset: 0;
  background: rgba(11, 14, 20, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease);
  padding: 20px;
}
.qr-modal.is-open { opacity: 1; pointer-events: auto; }
.qr-modal-inner {
  position: relative;
  width: min(380px, 92vw);
  background: var(--surface);
  border: 1px solid var(--accent);
  padding: var(--gap-4);
  font-family: var(--font-mono);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 80px rgba(240,136,62,0.18);
  border-radius: 8px;
  text-align: center;
  transform: translateY(8px) scale(0.98);
  opacity: 0;
  transition: transform 280ms var(--ease), opacity 280ms var(--ease);
}
.qr-modal.is-open .qr-modal-inner { transform: none; opacity: 1; }
.qr-close {
  position: absolute;
  top: 10px; right: 10px;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  width: 30px; height: 30px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  border-radius: 4px;
  transition: all 200ms var(--ease);
}
.qr-close:hover { border-color: var(--accent); color: var(--accent); }
.qr-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--gap-3);
  padding-bottom: var(--gap-2);
  border-bottom: 1px dashed var(--border-strong);
}
.qr-id {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.qr-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-cn-display);
  letter-spacing: 0.06em;
}
html[lang="en"] .qr-title { font-family: var(--font-mono); letter-spacing: 0.04em; }
.qr-img-wrap {
  background: #fff;
  padding: 12px;
  border-radius: 6px;
  margin: 0 auto var(--gap-3);
  width: max-content;
  max-width: 100%;
  box-shadow: 0 0 0 1px rgba(240,136,62,0.25), 0 16px 36px rgba(0,0,0,0.4);
}
.qr-img {
  display: block;
  width: 240px;
  max-width: 60vw;
  height: auto;
  border-radius: 4px;
}
.qr-desc {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
}
.qr-meta {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ============================================================
   MOBILE HARDENING
   ============================================================ */

@media (max-width: 640px) {
  :root {
    --pad-x: 18px;
    --gap-16: 72px;
    --gap-12: 56px;
  }
  body { font-size: 15px; }
  .nav { padding: 0 14px; }
  .brand-mono { font-size: 13px; }
  .nav-right { gap: 10px; }
  .lang-switch { padding: 3px 6px; }
  .live { display: none; }
  .btn-cta { padding: 6px 10px; font-size: 10px; }

  .hero { padding-top: calc(var(--nav-h) + 8px); }
  .hero-eyebrow { font-size: 10px; padding: 5px 10px; }
  .hero-desc { font-size: 14px; padding: 0 4px; }
  .hero-tagline { font-size: 12px; }
  .hero-actions { gap: 10px; }
  .btn-primary, .btn-ghost { padding: 12px 18px; font-size: 11px; }

  .ide-card { margin-top: var(--gap-8); }
  .ide-tab { display: none; }

  .marquee-track { font-size: 16px; gap: 18px; }

  .work-thumb { height: 160px; }
  .work-card { padding: 16px; }
  .work-title { font-size: 17px !important; }
  .work-result { font-size: 13px; }

  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .logo-tile { aspect-ratio: 1.6 / 1; }

  .gantt { padding: 16px; }
  .gantt-axis { font-size: 9px; }

  .metric { padding: 22px 18px; }
  .metric-value { font-size: 44px; }

  .activity-block { padding: 16px; overflow-x: auto; }
  .activity-grid { grid-auto-columns: 10px; }
  .legend-cell { width: 10px; height: 10px; }

  .contact-block { padding: 24px 18px; }
  .contact-prompt { font-size: 12px; }
  .contact-email { font-size: 18px; word-break: break-all; }
  .cta-mega { padding: 22px 18px; font-size: 18px; }

  .foot { padding: 32px 18px calc(28px + var(--status-h)); }

  .qr-modal-inner { padding: 22px 18px; }
  .qr-img { width: 220px; }
}

/* very small screens */
@media (max-width: 380px) {
  .brand-cn { display: none; }
  .nav-links { display: none; }
  .work-thumb { height: 140px; }
  .metric-value { font-size: 38px; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .marquee-track { animation: none; }
  .orb { animation: none; }
  #boot { display: none; }
  .hero-word, .hero-eyebrow, .hero-tagline, .hero-desc, .hero-actions, .hero-features, .ide-card { opacity: 1; transform: none; }
}