:root {
  --bg: #0b0e14;
  --panel: #121722;
  --panel-2: #171d2a;
  --line: #232b3b;
  --text: #e6edf3;
  --muted: #8b96a8;
  --teal: #2dd4bf;
  --teal-strong: #14b8a6;
  --teal-ink: #04201c;
  --mono: "Cascadia Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 75% -10%, rgba(20, 184, 166, 0.16), transparent 70%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 20px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; }
.brand:hover { text-decoration: none; }

nav { display: flex; align-items: center; gap: 18px; font-size: 14px; }
nav a { color: var(--muted); }
nav a:hover { color: var(--text); text-decoration: none; }

#lang {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  padding: 5px 10px;
  font: inherit;
  cursor: pointer;
}
#lang:hover { border-color: var(--teal-strong); }

main { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.hero { text-align: center; padding: 56px 0 40px; }
.hero-logo { filter: drop-shadow(0 18px 40px rgba(20, 184, 166, 0.25)); }
.hero h1 {
  margin: 20px auto 12px;
  max-width: 760px;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.lead { margin: 0 auto; max-width: 620px; color: var(--muted); font-size: 18px; }

.cta { display: flex; flex-direction: column; align-items: center; gap: 10px; margin: 30px 0 44px; }
.version { color: var(--muted); font-size: 13px; min-height: 1.2em; }

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font-weight: 600;
  text-align: center;
}
.btn:hover { text-decoration: none; border-color: var(--teal-strong); }
.btn.primary {
  padding: 14px 28px;
  background: linear-gradient(180deg, var(--teal), var(--teal-strong));
  border-color: transparent;
  color: var(--teal-ink);
  font-size: 17px;
  box-shadow: 0 10px 30px rgba(20, 184, 166, 0.25);
}
.btn.primary:hover { filter: brightness(1.06); }

.term {
  max-width: 720px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0d1119;
  text-align: left;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}
.term-bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a3242; }
.term-bar span { margin-left: 8px; }
.term pre {
  margin: 0;
  padding: 16px 18px 20px;
  font: 13.5px/1.7 var(--mono);
  white-space: pre-wrap;
  word-break: break-word;
}
.term .p { color: var(--teal); }
.term .m { color: var(--muted); }
.cursor { display: inline-block; width: 8px; height: 1.1em; vertical-align: -2px; background: var(--teal); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

h2 { font-size: 26px; margin: 0 0 20px; letter-spacing: -0.01em; }

.downloads { padding: 48px 0 24px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}
.card.mine { border-color: var(--teal-strong); box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.25) inset; }
.card h3 { margin: 0; font-size: 20px; display: flex; align-items: center; gap: 8px; }
.card .btn { margin-top: 6px; }
.req { margin: 0; color: var(--muted); font-size: 14px; }
.size { margin: 0; color: var(--muted); font-size: 12.5px; min-height: 1.2em; }
.note { margin: 4px 0 0; color: var(--muted); font-size: 13.5px; }
.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(45, 212, 191, 0.14);
  color: var(--teal);
}
.linux { color: var(--muted); font-size: 14px; margin: 16px 0 0; }

.features { padding: 40px 0 64px; }
.features ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.features li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(18, 23, 34, 0.6);
}
.features span { color: var(--muted); font-size: 14.5px; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.center { display: grid; place-items: center; min-height: 100vh; text-align: center; }

@media (max-width: 820px) {
  .cards, .features ul { grid-template-columns: 1fr; }
  nav a[href^="https"] { display: none; }
  .hero { padding-top: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
}