:root {
  --bg: #0f1419;
  --bg2: #161d25;
  --ink: #e8ecef;
  --muted: #8b97a3;
  --line: rgba(232, 236, 239, 0.12);
  --accent: #c4a574;
  --panel: #1a222c;
  --max: 720px;
  --font: "Manrope", "Noto Sans TC", sans-serif;
  --display: "Instrument Serif", "Noto Sans TC", serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.02rem;
  line-height: 1.55;
  background:
    radial-gradient(ellipse 70% 40% at 80% -10%, rgba(196, 165, 116, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2) 40%, var(--bg));
  min-height: 100vh;
}

a { color: inherit; }
img { max-width: 100%; display: block; }

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 99;
  background: #fff;
  color: #111;
  padding: 0.5rem 0.75rem;
}

html[data-lang="zh"] [data-en] { display: none !important; }
html[data-lang="en"] [data-zh] { display: none !important; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(10px);
}
.logo {
  font-family: var(--display);
  font-size: 1.35rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav {
  display: none;
  gap: 1.1rem;
  margin-left: auto;
  margin-right: 0.5rem;
}
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}
.nav a:hover { color: var(--ink); }
.lang {
  margin-left: auto;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  min-height: 36px;
  padding: 0 0.9rem;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}
@media (min-width: 720px) {
  .nav { display: flex; }
  .lang { margin-left: 0; }
}

main { padding: 0 1.25rem 4rem; }

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 0 2.5rem;
  min-height: calc(100svh - 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.eyebrow {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(3.2rem, 12vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}
.role {
  margin: 1.1rem 0 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent);
}
.deck {
  margin: 1rem 0 0;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}
.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.75rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.25s var(--ease), background 0.25s, border-color 0.25s;
}
.btn:hover { transform: translateY(-1px); }
.btn.solid {
  background: var(--ink);
  color: var(--bg);
}
.btn.line {
  border: 1px solid var(--line);
  color: var(--ink);
}

.proof {
  max-width: var(--max);
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.proof div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.proof strong {
  font-family: var(--display);
  font-size: 1.85rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.proof span {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.35;
}
@media (max-width: 560px) {
  .proof { grid-template-columns: 1fr; gap: 1rem; }
}

.block {
  max-width: var(--max);
  margin: 0 auto 4rem;
}
.block-h h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: 2.2rem;
  letter-spacing: -0.02em;
}
.block-h p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  max-width: 28rem;
}

.case {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.case-kicker {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.case h3 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.55rem, 4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.facts {
  margin: 0.75rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.case-grid {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 720px) {
  .case-grid { grid-template-columns: 1fr 1fr 1fr; gap: 1.5rem; }
}
.case-grid h4 {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.case-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.text-link {
  display: inline-block;
  margin-top: 0.65rem;
  color: var(--ink);
  font-size: 0.88rem;
  word-break: break-all;
}

.link-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.link-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.15rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 560px) {
  .link-list li {
    grid-template-columns: minmax(8rem, 12rem) 1fr;
    align-items: baseline;
    gap: 1rem;
  }
}
.link-list a {
  font-weight: 600;
  text-decoration: none;
}
.link-list a:hover { color: var(--accent); }
.link-list span { color: var(--muted); font-size: 0.9rem; }

.stack {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}
@media (min-width: 640px) {
  .stack { grid-template-columns: 1fr 1fr; }
}
.stack h3 {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.stack p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.edu {
  margin: 1.75rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 0 1rem;
  border-top: 1px solid var(--line);
}
.contact h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: 2.4rem;
}
.contact p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  max-width: 28rem;
}

.foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}