/* ──────────────────────────────────────────────────────────
   周全 Brand CSS — modern aesthetic (3-site shared)
   bg: deep ink · accents: warm gold + violet · serif TC
   ────────────────────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  background: #06070b;
  color: rgba(255, 255, 255, 0.92);
  font-family: "Noto Sans TC", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
*:focus-visible {
  outline: 2px solid rgba(253, 230, 138, 0.7);
  outline-offset: 3px;
  border-radius: 2px;
}
a {
  color: inherit;
  text-decoration: none;
}
img,
svg {
  display: block;
  max-width: 100%;
}

/* ── Background mesh — fixed, behind content ── */
.bg-mesh,
.bg-grid,
.bg-grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.bg-mesh { overflow: hidden; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  will-change: transform;
}
.blob-a {
  top: -22vh; left: -10vw;
  width: 70vw; height: 70vw;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.55), rgba(217, 119, 6, 0) 60%);
  animation: drift-a 28s ease-in-out infinite;
}
.blob-b {
  top: 25vh; right: -15vw;
  width: 65vw; height: 65vw;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.45), rgba(124, 58, 237, 0) 60%);
  animation: drift-b 32s ease-in-out infinite;
}
.blob-c {
  bottom: -18vh; left: 28vw;
  width: 50vw; height: 50vw;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.4), rgba(14, 165, 233, 0) 60%);
  animation: drift-c 36s ease-in-out infinite;
}
@keyframes drift-a { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(80px,-40px) scale(1.1); } }
@keyframes drift-b { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-60px,60px) scale(1.05); } }
@keyframes drift-c { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(40px,-50px) scale(0.95); } }

.bg-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85), transparent 80%);
          mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85), transparent 80%);
}
.bg-grain {
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
}

/* ── Layout ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
}
.container-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Site nav (shared) ── */
.site-nav {
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  font-family: "Noto Serif TC", serif;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.97);
}
.site-logo small {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.26em;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  font-weight: 400;
}
.site-nav-links {
  display: flex;
  gap: 24px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
}
.site-nav-links a { transition: color 0.2s; }
.site-nav-links a:hover,
.site-nav-links a[aria-current="page"] {
  color: rgba(255, 255, 255, 0.96);
}

/* ── Hero ── */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  border-radius: 999px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.78);
  text-transform: uppercase;
  margin-bottom: 32px;
}
.eyebrow.dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }

.h-display {
  font-family: "Noto Serif TC", serif;
  font-weight: 400;
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.97);
}
.h-display em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(110deg, #fde68a, #fb923c, #f9a8d4);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
  display: block;
  margin-top: 6px;
}

.lead {
  font-size: clamp(15px, 1.4vw, 17px);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.85;
  max-width: 560px;
  margin: 24px auto 0;
}

/* ── Section ── */
.sec {
  padding: 80px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.sec-eyebrow {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.sec-title {
  font-family: "Noto Serif TC", serif;
  font-weight: 400;
  font-size: clamp(30px, 3.8vw, 48px);
  line-height: 1.12;
  color: rgba(255, 255, 255, 0.97);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.sec-title em {
  font-style: italic;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.65);
}
.sec-sub {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.85;
  max-width: 600px;
  margin: 0 0 44px;
}

/* ── Prose (long-form text content) ── */
.prose {
  font-size: 15.5px;
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.86);
}
.prose h2 {
  font-family: "Noto Serif TC", serif;
  font-weight: 500;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: -0.005em;
  color: rgba(255, 255, 255, 0.97);
  line-height: 1.35;
  margin: 56px 0 18px;
}
.prose h3 {
  font-family: "Noto Serif TC", serif;
  font-weight: 500;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.95);
  margin: 36px 0 12px;
  line-height: 1.45;
}
.prose p { margin-bottom: 18px; }
.prose strong { color: rgba(255, 255, 255, 0.97); font-weight: 600; }
.prose em { font-style: italic; color: #fde68a; }
.prose a {
  color: #fde68a;
  border-bottom: 1px solid rgba(253, 230, 138, 0.35);
  transition: border-color 0.2s, color 0.2s;
}
.prose a:hover { color: #fef3c7; border-color: rgba(253, 230, 138, 0.8); }
.prose ul,
.prose ol { margin: 0 0 20px 1.4em; }
.prose li { margin-bottom: 8px; }
.prose blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  border-left: 2px solid rgba(253, 230, 138, 0.5);
  background: rgba(255, 255, 255, 0.025);
  border-radius: 0 12px 12px 0;
  font-family: "Noto Serif TC", serif;
  font-style: italic;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.88);
}
.prose code,
.prose .mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.9em;
  color: #fde68a;
  background: rgba(253, 230, 138, 0.07);
  padding: 1px 6px;
  border-radius: 3px;
}
.prose hr {
  border: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: 40px 0;
}
.prose .muted {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

/* ── Card (universal) ── */
.card {
  position: relative;
  padding: 28px 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.025);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  border-radius: 18px;
  transition: border-color 0.3s, transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s;
}
.card:hover {
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.55);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: "Noto Serif TC", serif;
  font-size: 14px;
  font-weight: 500;
  transition: transform 0.3s, background 0.2s, color 0.2s, border-color 0.2s;
}
.btn-primary {
  background: rgba(255, 255, 255, 0.96);
  color: #06070b;
}
.btn-primary:hover { background: #fde68a; transform: translateY(-2px); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.4); }

/* ── Footer (shared) ── */
.site-foot {
  padding: 44px 0 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.foot-mark {
  font-family: "Noto Serif TC", serif;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}
.foot-mark small {
  margin-left: 10px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  font-weight: 400;
}
.foot-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
}
.foot-links a { transition: color 0.2s; }
.foot-links a:hover { color: rgba(255, 255, 255, 0.95); }

/* ── Reveal (entrance) — JS-fail safe ── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
/* If JS is disabled or never marks visible, show after a short fail-safe delay */
.no-js .reveal,
html:not(.js) .reveal { opacity: 1; transform: none; transition: none; }

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none !important; }
  .reveal,
  .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ── Responsive nudges ── */
@media (max-width: 640px) {
  .container,
  .container-narrow { padding: 0 20px; }
  .site-nav { padding: 22px 0; }
  .site-nav-links { gap: 16px; font-size: 10.5px; }
  .hero { padding: 60px 0 50px; }
  .sec { padding: 64px 0; }
}