/* =========================================================
   web-design SKILL · Landing (lean + GradientBlinds + RollingGallery)
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --bg: #0a0b0e;
  --bg-2: #07080b;
  --surface-1: #111217;
  --surface-2: #171921;
  --surface-3: #1f222d;

  --border: rgba(67, 70, 81, 0.5);
  --border-strong: rgba(67, 70, 81, 0.9);
  --border-accent: rgba(94, 234, 212, 0.3);

  --text-1: #ebecef;
  --text-2: #c6c9d2;
  --text-3: #8d909c;
  --text-4: #60636f;

  --accent-cool: #5EEAD4;
  --accent-cool-hover: #8CF5E3;
  --accent-cool-soft: rgba(94, 234, 212, 0.12);
  --accent-warm: #FB923C;
  --accent-warm-hover: #FDB874;
  --accent-warm-soft: rgba(251, 146, 60, 0.12);

  --gradient-key: linear-gradient(135deg, #5EEAD4 0%, #FB923C 100%);

  --bg-rgb: 10, 11, 14;
  --accent-cool-rgb: 94, 234, 212;
  --accent-warm-rgb: 251, 146, 60;

  --font-ui: 'DM Sans', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Instrument Serif', 'Noto Serif SC', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;  --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px;  --sp-8: 64px;
  --sp-9: 96px; --sp-10: 128px;

  --ease: cubic-bezier(.2, 0, 0, 1);
  --ease-cinema: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
[id] { scroll-margin-top: 90px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font: 400 15px/1.65 var(--font-ui);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
img, svg { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}
.eyebrow {
  display: inline-block;
  font: 500 12px/1 var(--font-mono);
  color: var(--text-4);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--sp-5);
}
.section-h2 {
  font: 700 clamp(32px, 4.4vw, 54px)/1.12 var(--font-ui);
  color: var(--text-1);
  letter-spacing: -0.02em;
  margin-bottom: var(--sp-4);
}
.section-sub {
  font: 400 17px/1.6 var(--font-ui);
  color: var(--text-3);
  max-width: 640px;
  margin-bottom: var(--sp-7);
}
.section-head { margin-bottom: var(--sp-8); }

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-key);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 100;
  pointer-events: none;
}

/* ---------- 🌫 Glass full-width magnetic bar ---------- */
.nav {
  position: fixed;
  top: 14px;
  left: 0; right: 0;
  z-index: 60;
  padding: 0 clamp(16px, 3vw, 28px);
  pointer-events: none;
}
.nav-inner {
  pointer-events: auto;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 10px 8px 20px;
  background: rgba(10, 11, 14, 0.55);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.35),
    0 1px 0 rgba(255, 255, 255, 0.06) inset;
  transition: box-shadow .28s var(--ease);
}
.nav.is-scrolled .nav-inner {
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.5),
    0 1px 0 rgba(255, 255, 255, 0.08) inset;
}
.nav-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 14px/1 var(--font-ui);
  color: var(--text-1);
  letter-spacing: -0.01em;
  padding: 4px 2px;
}
.logo-mark {
  width: 22px; height: 22px;
  border-radius: 6px;
  background: var(--gradient-key);
  position: relative; overflow: hidden;
}
.logo-mark::after { content: ''; position: absolute; inset: 3px; border-radius: 4px; background: var(--bg); }
.nav-right {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.lang-toggle {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 10px;
  border-radius: 9999px;
  font: 500 12px/1 var(--font-mono);
  color: var(--text-3);
  transition: color .15s, background .15s;
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.06); color: var(--text-1); }
html[data-lang="zh"] .lang-toggle .lang-zh { color: var(--accent-cool); }
html[data-lang="en"] .lang-toggle .lang-en { color: var(--accent-cool); }

.nav-github {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-1);
  font: 500 12.5px/1 var(--font-ui);
  transition: background .15s, color .15s;
}
.nav-github:hover { background: var(--accent-cool); color: var(--bg); }

@media (max-width: 520px) {
  .nav-inner { padding: 6px 10px 6px 14px; gap: 10px; }
  .nav-logo span:not(.logo-mark) { display: none; }
  .nav-github span { display: none; }
}

/* ---------- Buttons ---------- */
.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-radius: 9999px;
  font: 500 14px/1 var(--font-ui);
  letter-spacing: -0.005em;
  white-space: nowrap;
  transition: transform .22s var(--ease), background .12s var(--ease), box-shadow .22s var(--ease), border-color .12s;
}
.btn-primary { background: var(--accent-cool); color: var(--bg); border: 1px solid var(--accent-cool); }
.btn-primary:hover { background: var(--accent-cool-hover); box-shadow: 0 8px 28px rgba(var(--accent-cool-rgb), 0.3); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:focus-visible { outline: 2px solid var(--accent-cool); outline-offset: 3px; }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-1);
  border: 1px solid var(--border-strong);
  padding: 11px 19px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--text-3); }
.btn-ghost:focus-visible { outline: 2px solid var(--accent-cool); outline-offset: 3px; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 140px 0 100px;
  overflow: hidden;
  isolation: isolate;
}

/* 🔥 GradientBlinds — WebGL shader canvas host (via OGL) */
.gradient-blinds {
  position: absolute; inset: 0;
  z-index: -2;
  opacity: 0;
  transition: opacity 1.2s ease-out;
}
.gradient-blinds.is-ready { opacity: 1; }
.gradient-blinds canvas { display: block; width: 100%; height: 100%; }

/* Fallback gradient (shown before blinds ready + reduced-motion) */
.gradient-blinds::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 30% 30%, rgba(var(--accent-cool-rgb), 0.22), transparent 65%),
    radial-gradient(50% 42% at 75% 55%, rgba(var(--accent-warm-rgb), 0.18), transparent 60%),
    radial-gradient(45% 40% at 50% 90%, rgba(168, 139, 250, 0.12), transparent 60%);
  z-index: -1;
}
.gradient-blinds.is-ready::before { opacity: 0; transition: opacity .8s; }

/* Bottom vignette to blend into page */
.hero-vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 110%, var(--bg) 0%, transparent 60%),
    linear-gradient(180deg, rgba(10,11,14,0.2) 0%, transparent 20%, transparent 70%, rgba(10,11,14,0.9) 100%);
  pointer-events: none;
  z-index: -1;
}

/* Hero content */
.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
}
.hero-title {
  font: 700 clamp(44px, 6vw, 84px)/1.05 var(--font-ui);
  letter-spacing: -0.025em;
  color: var(--text-1);
  margin: var(--sp-5) 0 var(--sp-5);
  animation: titleReveal 1.1s cubic-bezier(.16, 1, .3, 1) both;
  animation-delay: 0.15s;
  text-shadow: 0 2px 30px rgba(0,0,0,0.5);
}
@keyframes titleReveal {
  from { clip-path: inset(0 100% 0 0); transform: translateY(18px); opacity: 0; }
  to   { clip-path: inset(0 0 0 0);     transform: translateY(0);    opacity: 1; }
}
.hero-eyebrow-anim { animation: fadeInUp .9s cubic-bezier(.16, 1, .3, 1) both; }
.hero-sub-anim     { animation: fadeInUp 1s cubic-bezier(.16, 1, .3, 1) .55s both; }
.hero-ctas-anim    { animation: fadeInUp .9s cubic-bezier(.16, 1, .3, 1) .75s both; }
.hero-steps-anim   { animation: fadeInUp .9s cubic-bezier(.16, 1, .3, 1) .95s both; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

.key-gradient {
  background: linear-gradient(135deg, var(--accent-cool), var(--accent-warm), var(--accent-cool));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientSlide 14s linear infinite;
}
@keyframes gradientSlide { to { background-position: -300% 0; } }

.hero-sub {
  font: 400 17px/1.7 var(--font-ui);
  color: var(--text-2);
  margin: 0 auto var(--sp-7);
  max-width: 620px;
  text-shadow: 0 1px 20px rgba(0,0,0,0.4);
}
.hero-sub em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent-cool);
  font-size: 1.1em;
}
.hero-ctas {
  display: flex; justify-content: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-7);
}
.hero-steps {
  display: inline-flex; align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
  justify-content: center;
  padding: 10px 18px;
  background: rgba(var(--bg-rgb), 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 9999px;
}
.step {
  display: inline-flex; align-items: center;
  gap: 6px;
  font: 500 12px/1 var(--font-mono);
  color: var(--text-3);
}
.step-num { color: var(--text-4); letter-spacing: 0.06em; }
.step-sep { color: var(--text-4); font-family: var(--font-mono); }

/* ---------- WHY ---------- */
.why { padding: var(--sp-10) 0; }
.why-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--sp-6);
  align-items: stretch;
}
.why-col {
  padding: var(--sp-6);
  border-radius: 16px;
  background: var(--surface-1);
  border: 1px solid var(--border);
}
.why-col-good {
  border-color: var(--border-accent);
  background: linear-gradient(160deg, var(--surface-1), rgba(var(--accent-cool-rgb), 0.04));
}
.why-tag {
  display: inline-flex; align-items: center;
  padding: 4px 10px;
  border-radius: 9999px;
  font: 500 11px/1.4 var(--font-mono);
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-5);
}
.why-tag.bad { background: var(--surface-3); color: var(--text-3); border: 1px solid var(--border); }
.why-tag.good { background: var(--accent-cool-soft); color: var(--accent-cool); }
.why-demo {
  padding: var(--sp-4);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font: 500 13px/1.9 var(--font-mono);
  margin-bottom: var(--sp-5);
}
.code-line { color: var(--text-2); }
.code-line.bad-line { opacity: 0.75; position: relative; }
.code-line.bad-line::after {
  content: '';
  position: absolute; left: 0; right: 0; top: 50%;
  height: 1px; background: var(--text-4);
}
.code-line.good-line { color: var(--text-1); }
.code-line .comment { color: var(--text-4); }
.code-line .prop { color: var(--accent-warm); }
.code-line .val { color: var(--text-2); }
.code-line .val.accent { color: var(--accent-cool); }
.code-line .sel { color: var(--accent-cool); }
.why-ul li {
  padding: 6px 0;
  font: 400 14px/1.5 var(--font-ui);
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
}
.why-ul li:last-child { border-bottom: 0; }
.why-col-good .why-ul li { color: var(--text-2); }
.why-divider {
  display: flex; align-items: center; justify-content: center;
  font: 400 italic 20px/1 var(--font-serif);
  color: var(--text-4);
  padding: 0 var(--sp-3);
}
@media (max-width: 900px) {
  .why-compare { grid-template-columns: 1fr; gap: var(--sp-5); }
  .why-divider { padding: var(--sp-2) 0; }
}

/* ---------- THREE INPUTS ---------- */
.three-inputs { padding: var(--sp-10) 0; }
.inputs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.input-item {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}
.input-item:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.input-preview {
  aspect-ratio: 4 / 3;
  position: relative;
  background: var(--bg-2);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.input-body { padding: var(--sp-5) var(--sp-5) var(--sp-6); }
.input-num { font: 500 11px/1 var(--font-mono); color: var(--text-4); letter-spacing: 0.14em; margin-bottom: var(--sp-3); }
.input-title { font: 700 20px/1.3 var(--font-ui); color: var(--text-1); margin-bottom: var(--sp-3); letter-spacing: -0.01em; }
.input-desc { font: 400 14px/1.6 var(--font-ui); color: var(--text-3); }

.preview-prd { padding: 14px 18px; font: 500 11px/1.75 var(--font-mono); color: var(--text-2); }
.preview-prd .p-h1 { color: var(--text-1); font-weight: 700; margin-bottom: 4px; }
.preview-prd .p-h2 { color: var(--accent-cool); margin-top: 10px; }
.preview-prd .p-p { color: var(--text-3); }

.preview-url { position: relative; height: 100%; padding: 12px 16px; display: flex; flex-direction: column; gap: 8px; }
.preview-url .url-bar {
  display: flex; align-items: center; gap: 4px;
  padding: 6px 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: 500 10px/1 var(--font-mono);
  color: var(--text-3);
}
.preview-url .url-bar::before {
  content: ''; display: block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--accent-cool); margin-right: 4px;
}
.preview-url .token-row {
  display: flex; align-items: center; gap: 8px;
  font: 500 10.5px/1 var(--font-mono);
  color: var(--text-2);
}
.preview-url .chip { width: 14px; height: 14px; border-radius: 3px; }

.preview-shot { position: relative; width: 100%; height: 100%; overflow: hidden; }
.preview-shot::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 25% 30%, #5EEAD4 0%, transparent 45%),
    radial-gradient(circle at 75% 65%, #c084fc 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, #FB923C 0%, transparent 45%),
    var(--surface-2);
  filter: saturate(140%);
}
.preview-shot .shot-anno {
  position: absolute; top: 14px; left: 16px;
  padding: 4px 10px;
  background: rgba(10, 11, 14, 0.7);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font: 500 11px/1 var(--font-mono);
  color: var(--text-1);
  z-index: 2;
}
@media (max-width: 900px) { .inputs-grid { grid-template-columns: 1fr; } }

/* ---------- WORKFLOW ---------- */
.workflow { padding: var(--sp-10) 0; }
.phases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  position: relative;
}
.phases-grid::before {
  content: '';
  position: absolute;
  top: 60px; left: 18%; right: 18%;
  height: 1px;
  background: linear-gradient(90deg, var(--border-accent), rgba(251,146,60,0.35));
  z-index: 0;
}
.phase-card {
  position: relative;
  padding: var(--sp-6);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
  z-index: 1;
}
.phase-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.phase-card-head { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.phase-badge {
  flex: none;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--gradient-key);
  color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  font: 700 italic 20px/1 var(--font-serif);
}
.phase-step-label {
  font: 500 11px/1 var(--font-mono);
  color: var(--text-4);
  letter-spacing: 0.14em;
  margin-bottom: 4px;
}
.phase-step-name { font: 700 20px/1.2 var(--font-ui); color: var(--text-1); letter-spacing: -0.01em; }
.phase-desc { font: 400 14px/1.6 var(--font-ui); color: var(--text-3); margin-bottom: var(--sp-4); }
.phase-out {
  padding: var(--sp-4);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font: 500 12px/1.7 var(--font-mono);
  color: var(--text-2);
}
.phase-out .po-h { color: var(--accent-cool); margin-bottom: 6px; }
.phase-out .po-list li { color: var(--text-3); padding: 1px 0; }
@media (max-width: 900px) {
  .phases-grid { grid-template-columns: 1fr; }
  .phases-grid::before { display: none; }
}

/* ---------- 🎡 ROLLING GALLERY (3D cylinder) ---------- */
.whats-inside { padding: var(--sp-10) 0 var(--sp-9); }
.rolling-gallery {
  position: relative;
  width: 100%;
  height: 520px;
  overflow: hidden;
  user-select: none;
  isolation: isolate;
  margin-top: var(--sp-5);
}
.rolling-gallery::before, .rolling-gallery::after {
  content: '';
  position: absolute; top: 0; bottom: 0;
  width: 100px;
  z-index: 3;
  pointer-events: none;
}
.rolling-gallery::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.rolling-gallery::after { right: 0; background: linear-gradient(-90deg, var(--bg), transparent); }

.rolling-viewport {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  perspective: 1200px;
  cursor: grab;
}
.rolling-viewport:active { cursor: grabbing; }

.rolling-track {
  position: relative;
  width: 1600px; /* cylinderWidth */
  height: 260px;
  transform-style: preserve-3d;
  transform: rotateY(var(--roll, 0deg));
  transition: transform 0.8s cubic-bezier(.16, 1, .3, 1);
  will-change: transform;
}
.rolling-track.dragging { transition: none; }

.rolling-face {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 380px;
  height: 260px;
  transform:
    translate(-50%, -50%)
    rotateY(calc(var(--i) * 60deg))
    translateZ(380px);   /* radius ~ 1600/(2π) ≈ 255, bump for gap */
  backface-visibility: hidden;
}
.rolling-card {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 22px 24px 24px;
  border-radius: 18px;
  border: 1px solid var(--border-strong);
  overflow: hidden;
  display: flex; flex-direction: column;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  transition: transform .3s var(--ease);
}
.rolling-card:hover { transform: scale(1.03); }
.rolling-card::before {
  content: '';
  position: absolute; inset: 0;
  filter: saturate(140%);
  z-index: -1;
}
.rolling-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,11,14,0.1) 0%, rgba(10,11,14,0.85) 80%);
  z-index: -1;
}
.rolling-card.card-1::before { background: radial-gradient(circle at 30% 35%, #5EEAD4 0%, transparent 48%), radial-gradient(circle at 72% 65%, #FB923C 0%, transparent 46%), #111217; }
.rolling-card.card-2::before { background: radial-gradient(circle at 20% 30%, #F59E0B 0%, transparent 40%), radial-gradient(circle at 70% 70%, #EC4899 0%, transparent 45%), #111217; }
.rolling-card.card-3::before { background: radial-gradient(circle at 30% 50%, #8B5CF6 0%, transparent 45%), radial-gradient(circle at 75% 50%, #5EEAD4 0%, transparent 40%), #111217; }
.rolling-card.card-4::before { background: radial-gradient(circle at 30% 35%, #FB923C 0%, transparent 48%), radial-gradient(circle at 70% 60%, #FBBF24 0%, transparent 42%), #111217; }
.rolling-card.card-5::before { background: radial-gradient(circle at 25% 40%, #10B981 0%, transparent 45%), radial-gradient(circle at 70% 55%, #3B82F6 0%, transparent 42%), #111217; }
.rolling-card.card-6::before { background: radial-gradient(circle at 25% 40%, #5EEAD4 0%, transparent 42%), radial-gradient(circle at 75% 55%, #0EA5E9 0%, transparent 45%), #111217; }

.rc-num { font: 500 11px/1 var(--font-mono); color: var(--text-4); letter-spacing: 0.14em; margin-bottom: var(--sp-3); }
.rc-title {
  font: 700 22px/1.25 var(--font-ui);
  color: var(--text-1);
  margin-bottom: var(--sp-3);
  letter-spacing: -0.01em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.rc-body {
  font: 400 13.5px/1.55 var(--font-ui);
  color: var(--text-2);
  margin-bottom: auto;
  padding-bottom: var(--sp-3);
}
.rc-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.rolling-hint {
  position: absolute; bottom: 16px; left: 50%;
  transform: translateX(-50%);
  font: 500 11px/1 var(--font-mono);
  color: var(--text-4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 4;
}

@media (max-width: 640px) {
  .rolling-gallery { height: 420px; }
  .rolling-track { width: 1100px; }
  .rolling-face { width: 280px; height: 220px; transform: translate(-50%, -50%) rotateY(calc(var(--i) * 60deg)) translateZ(260px); }
}

/* ---------- TAGS ---------- */
.tag {
  display: inline-flex; align-items: center;
  padding: 3px 10px;
  border-radius: 9999px;
  background: var(--accent-cool-soft);
  color: var(--accent-cool);
  font: 500 10.5px/1.4 var(--font-mono);
  letter-spacing: 0.04em;
}
.tag.tag-warm { background: var(--accent-warm-soft); color: var(--accent-warm); }

/* ---------- 🌐 DOME GALLERY (ported from react-bits DomeGallery, MIT) ---------- */
.showcase { padding: var(--sp-10) 0 var(--sp-9); overflow: hidden; }

.dome-root {
  position: relative;
  width: 100%;
  height: 820px;
  margin-top: var(--sp-6);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  /* DomeGallery tokens — align with react-bits reference */
  --segments-x: 35;
  --segments-y: 35;
  --radius: 680px;
  --viewer-pad: 64px;
  --overlay-blur-color: #0a0b0e;
  --tile-radius: 10px;
  /* derived */
  --circ: calc(var(--radius) * 3.14);
  --rot-y: calc((360deg / var(--segments-x)) / 2);
  --rot-x: calc((360deg / var(--segments-y)) / 2);
  --item-width: calc(var(--circ) / var(--segments-x));
  --item-height: calc(var(--circ) / var(--segments-y));
}
.dome-root * { box-sizing: border-box; }
.dome-sphere, .dome-tile, .dome-tile-inner { transform-style: preserve-3d; }

.dome-main {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  overflow: hidden;
  background: transparent;
  cursor: grab;
}
.dome-main.dragging { cursor: grabbing; }

.dome-stage {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  perspective: calc(var(--radius) * 2);
  perspective-origin: 50% 50%;
  contain: layout paint size;
}

.dome-sphere {
  transform: translateZ(calc(var(--radius) * -1));
  will-change: transform;
}

.dome-overlay, .dome-overlay--blur {
  position: absolute; inset: 0;
  margin: auto;
  z-index: 3;
  pointer-events: none;
}
.dome-overlay {
  background-image: radial-gradient(rgba(10,11,14,0) 60%, var(--overlay-blur-color) 100%);
}
.dome-overlay--blur {
  -webkit-mask-image: radial-gradient(rgba(10,11,14,0) 68%, var(--overlay-blur-color) 92%);
  mask-image: radial-gradient(rgba(10,11,14,0) 68%, var(--overlay-blur-color) 92%);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.dome-edge {
  position: absolute; left: 0; right: 0;
  height: 120px; z-index: 5;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--overlay-blur-color));
}
.dome-edge--top { top: 0; transform: rotate(180deg); }
.dome-edge--bottom { bottom: 0; }

/* The tile lives on the sphere surface */
.dome-tile {
  width: calc(var(--item-width) * var(--item-size-x, 2));
  height: calc(var(--item-height) * var(--item-size-y, 2));
  position: absolute;
  top: -999px; bottom: -999px; left: -999px; right: -999px;
  margin: auto;
  transform-origin: 50% 50%;
  backface-visibility: hidden;
  transform:
    rotateY(calc(var(--rot-y) * (var(--offset-x) + ((var(--item-size-x, 2) - 1) / 2))))
    rotateX(calc(var(--rot-x) * (var(--offset-y) - ((var(--item-size-y, 2) - 1) / 2))))
    translateZ(var(--radius));
}
.dome-tile-inner {
  position: absolute; inset: 10px;
  border-radius: var(--tile-radius);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transform: translateZ(0);
}

/* Card visuals — pure color swatches (placeholders, no label overlay) */
.dome-card {
  position: absolute; inset: 0;
  filter: saturate(110%);
}

/* Image tiles — website screenshots */
.dome-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top center;  /* 展示首屏上半部分 */
  display: block;
  background: var(--surface-1);  /* 图片未加载时的占位色 */
  pointer-events: none;
}
.dome-card.sc-a { background: radial-gradient(circle at 30% 40%, #5EEAD4, transparent 50%), radial-gradient(circle at 70% 60%, #FB923C, transparent 45%), #111217; }
.dome-card.sc-b { background: radial-gradient(circle at 30% 40%, #ECE7DE, transparent 40%), radial-gradient(circle at 70% 60%, #E8682A, transparent 45%), #2a2017; }
.dome-card.sc-c { background: radial-gradient(circle at 50% 40%, #2563EB, transparent 45%), radial-gradient(circle at 50% 80%, #F59E0B, transparent 45%), #0e1523; }
.dome-card.sc-d { background: radial-gradient(circle at 30% 40%, #C45C3C, transparent 45%), radial-gradient(circle at 70% 70%, #2C5F6E, transparent 40%), #201814; }
.dome-card.sc-e { background: radial-gradient(circle at 50% 40%, #0066FF, transparent 35%), #0a0f17; }
.dome-card.sc-f { background: radial-gradient(circle at 30% 40%, #00D4FF, transparent 45%), radial-gradient(circle at 70% 60%, #8B5CF6, transparent 40%), #0B0B0F; }
.dome-card.sc-g { background: radial-gradient(circle at 30% 40%, #ECE7DE, transparent 45%), radial-gradient(circle at 70% 60%, #FDB874, transparent 45%), #2a2218; }
.dome-card.sc-h { background: radial-gradient(circle at 30% 40%, #FF3366, transparent 45%), radial-gradient(circle at 70% 70%, #FFD700, transparent 45%), #251a10; }
.dome-card.sc-i { background: radial-gradient(circle at 30% 40%, #A78BFA, transparent 50%), radial-gradient(circle at 70% 60%, #5EEAD4, transparent 40%), #1a1824; }
.dome-card.sc-j { background: radial-gradient(circle at 30% 40%, #5B8C5A, transparent 45%), radial-gradient(circle at 70% 60%, #C4956A, transparent 45%), #1a1812; }

.dome-palette { display: none; }

.dome-hint {
  position: absolute; bottom: 18px; left: 50%;
  transform: translateX(-50%);
  font: 500 11px/1 var(--font-mono);
  color: var(--text-4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 6;
  pointer-events: none;
}

@media (max-width: 640px) {
  .dome-root { height: 600px; --radius: 440px; --viewer-pad: 24px; }
}

/* ---------- 👤 MADE BY — author card ---------- */
.author {
  padding: var(--sp-10) 0 var(--sp-8);
  position: relative;
}
.author::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 50% at 50% 50%, rgba(var(--accent-warm-rgb), 0.05), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* Narrow centered column — no .container */
.author-inner {
  max-width: 520px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.author-inner .eyebrow {
  margin-bottom: var(--sp-5);
}

.author-avatar {
  width: 96px; height: 96px;
  flex: none;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-strong);
  box-shadow:
    0 0 0 4px rgba(10, 11, 14, 0.6),
    0 12px 40px rgba(0, 0, 0, 0.5);
  background: var(--surface-1);
  margin-bottom: var(--sp-5);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.author-avatar:hover {
  transform: scale(1.04);
  border-color: var(--accent-cool);
}
.author-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.author-name {
  font: 700 26px/1.25 var(--font-ui);
  color: var(--text-1);
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-4);
}

.author-bio {
  font: 400 15px/1.7 var(--font-ui);
  color: var(--text-3);
  max-width: 440px;
  margin: 0 0 var(--sp-6);
}

.author-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.author-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  font: 500 13px/1 var(--font-ui);
  white-space: nowrap;
  transition: background .15s, color .15s, border-color .15s, transform .15s;
}
.author-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-1);
  border-color: var(--text-3);
  transform: translateY(-1px);
}
.author-btn-icon {
  width: 40px; height: 40px;
  padding: 0;
  justify-content: center;
}

.author-btn-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 5px;
  background: var(--text-2);
  color: var(--bg);
  font: 700 10px/1 var(--font-ui);
  flex: none;
  transition: background .15s;
}
.author-btn:hover .author-btn-dot {
  background: var(--text-1);
}

@media (max-width: 520px) {
  .author-avatar { width: 84px; height: 84px; }
  .author-name { font-size: 22px; }
  .author-btn { font-size: 12px; padding: 8px 14px; }
}

/* ---------- INSTALL ---------- */
.install { padding: var(--sp-10) 0; text-align: center; position: relative; }
.install::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 30%, rgba(var(--accent-cool-rgb), 0.08), transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.install-inner { max-width: 760px; margin: 0 auto; }
.install-title {
  font: 700 clamp(40px, 5.6vw, 72px)/1.05 var(--font-ui);
  letter-spacing: -0.025em;
  color: var(--text-1);
  margin: var(--sp-5) 0 var(--sp-4);
}
.install-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent-cool);
  font-size: 1.1em;
}
.install .section-sub { margin: 0 auto var(--sp-7); text-align: center; }

.codeblock {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  background: var(--surface-1);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  font: 500 14px/1 var(--font-mono);
  text-align: left;
  max-width: 620px;
  margin: 0 auto var(--sp-5);
  overflow: hidden;
}
.codeblock .prompt { color: var(--text-4); user-select: none; flex: none; }
.codeblock .cmd { flex: 1; color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.copy-btn {
  position: relative;
  flex: none;
  padding: 6px 12px;
  font: 500 11px/1 var(--font-mono);
  color: var(--text-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: color .12s, border-color .12s, background .12s, transform .3s var(--ease-cinema);
}
.copy-btn:hover { color: var(--accent-cool); border-color: var(--accent-cool); }
.copy-btn.is-copied {
  color: var(--accent-cool);
  border-color: var(--accent-cool);
  background: var(--accent-cool-soft);
  animation: copyPulse .6s var(--ease-cinema);
}
@keyframes copyPulse {
  0% { transform: scale(1); }
  40% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.copy-toast {
  position: absolute;
  top: -38px; left: 50%;
  transform: translate(-50%, 6px);
  padding: 6px 12px;
  background: var(--accent-cool);
  color: var(--bg);
  border-radius: 8px;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: transform .3s var(--ease-cinema), opacity .3s;
  z-index: 10;
}
.copy-toast::after {
  content: '';
  position: absolute;
  left: 50%; bottom: -4px;
  transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  background: var(--accent-cool);
}
.copy-toast.show { opacity: 1; transform: translate(-50%, 0); }

.copy-spark {
  position: absolute;
  top: 50%; left: 50%;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent-cool);
  pointer-events: none;
  animation: sparkBurst .6s ease-out forwards;
  z-index: 10;
}
@keyframes sparkBurst {
  0% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  100% { transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(0); opacity: 0; }
}

.install-req { font: 500 13px/1.5 var(--font-mono); color: var(--text-4); margin-bottom: var(--sp-7); }
.install-req a { color: var(--accent-cool); }
.install-ctas { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer { padding: var(--sp-9) 0 var(--sp-7); border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: var(--sp-7); }
.footer-title { font: 700 18px/1.2 var(--font-ui); color: var(--text-1); margin-bottom: var(--sp-3); letter-spacing: -0.01em; }
.footer-tag { font: 500 13px/1 var(--font-mono); color: var(--text-3); margin-bottom: var(--sp-4); }
.footer-meta { font: 400 13px/1 var(--font-ui); color: var(--text-4); }
.footer-h { font: 500 11px/1 var(--font-mono); color: var(--text-4); letter-spacing: 0.14em; margin-bottom: var(--sp-3); text-transform: uppercase; }
.footer-list li { padding: 4px 0; font: 400 14px/1.5 var(--font-ui); color: var(--text-3); }
.footer-list a { color: var(--text-3); transition: color .12s; }
.footer-list a:hover { color: var(--accent-cool); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: var(--sp-5); } }

/* ---------- Reveal — each module fades up on first view ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease-cinema), transform .8s var(--ease-cinema);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* Stagger children inside a revealed section-head */
.section-head.reveal.in-view .eyebrow { animation: revealUp .7s var(--ease-cinema) both; }
.section-head.reveal.in-view .section-h2 { animation: revealUp .8s var(--ease-cinema) .08s both; }
.section-head.reveal.in-view .section-sub { animation: revealUp .8s var(--ease-cinema) .16s both; }

@keyframes revealUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .key-gradient { animation: none; background-position: 0 0; }
  .gradient-blinds { display: none; }
  .marquee-track { animation: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  .hero-title { font-size: clamp(36px, 10vw, 52px); }
  .hero-steps { flex-direction: column; padding: 12px 18px; gap: var(--sp-2); }
  .step-sep { display: none; }
}