:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #11161d;
  --border: #232a33;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #39d353;
  --accent-2: #58a6ff;
  --accent-3: #e3b341;
  --mono: "SFMono-Regular", "JetBrains Mono", "Fira Code", Consolas, "Courier New", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --maxw: 960px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  background:
    linear-gradient(rgba(56, 139, 253, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 139, 253, 0.04) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px, 32px 32px, auto;
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav__logo { color: var(--accent); }
.nav__links { display: flex; align-items: center; gap: 22px; }
.nav__links a { color: var(--text-dim); font-size: 0.92rem; transition: color .2s; }
.nav__links a:hover { color: var(--text); }
.nav__cta {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  padding: 6px 14px;
  border-radius: 6px;
}
.nav__cta:hover { background: var(--accent); color: #06140a !important; }
.nav__toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.4rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  display: flex;
  justify-content: center;
  padding: 90px 24px 70px;
  background:
    radial-gradient(600px 300px at 50% -10%, rgba(57,211,83,0.12), transparent);
  border-bottom: 1px solid var(--border);
}
.hero__inner { max-width: var(--maxw); width: 100%; }
.terminal {
  background: #0a0d12;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  font-family: var(--mono);
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #161b22;
  border-bottom: 1px solid var(--border);
}
.terminal__dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.terminal__dot--r { background: #ff5f56; }
.terminal__dot--y { background: #ffbd2e; }
.terminal__dot--g { background: #27c93f; }
.terminal__file { margin-left: 10px; color: var(--text-dim); font-size: 0.8rem; }
.terminal__body { padding: 26px 24px 30px; text-align: center; }
.terminal__line { font-size: 0.95rem; color: var(--text-dim); margin-bottom: 18px; }
.terminal__prompt { color: var(--accent); }
.terminal__cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }
.hero__title {
  font-family: var(--mono);
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  letter-spacing: 2px;
  margin-bottom: 8px;
  text-shadow: 0 0 24px rgba(57,211,83,0.25);
}
.hero__sub { font-size: 1.15rem; color: var(--text); margin-bottom: 18px; }
.hero__desc { color: var(--text-dim); margin-bottom: 30px; }
.hero__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  font-family: var(--mono);
  font-size: 0.92rem;
  padding: 11px 22px;
  border-radius: 7px;
  cursor: pointer;
  transition: transform .15s, background .2s, color .2s;
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #06140a; font-weight: 600; }
.btn--ghost { border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* ---------- 数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
}
.stat {
  background: var(--bg-soft);
  padding: 26px 12px;
  text-align: center;
}
.stat__num { font-family: var(--mono); font-size: 1.8rem; color: var(--accent); }
.stat__label { color: var(--text-dim); font-size: 0.82rem; margin-top: 4px; }

/* ---------- Section ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 64px 24px; }
.section__title {
  font-family: var(--mono);
  font-size: 1.5rem;
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.section__idx { color: var(--accent); font-size: 1rem; }
.section__hint { color: var(--text-dim); margin-bottom: 28px; font-size: 0.92rem; }

/* ---------- 关于 ---------- */
.about { display: flex; gap: 28px; align-items: flex-start; }
.about__avatar {
  width: 120px; height: 120px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  flex-shrink: 0;
}
.about__body p { margin-bottom: 14px; color: var(--text); }
.about__body strong { color: var(--accent); }
.about__stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.about__stack li {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
}

/* ---------- 卡片网格 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.card__title { font-family: var(--mono); font-size: 1.1rem; }
.card__badge {
  font-size: 0.72rem;
  font-family: var(--mono);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}
.card__price { font-family: var(--mono); color: var(--accent-2); font-size: 0.95rem; margin-bottom: 10px; }
.card__desc { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 14px; }
.card__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.card__tags span {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 6px;
}
.card__link { display: inline-block; margin-top: 14px; color: var(--accent); font-family: var(--mono); font-size: 0.85rem; }

/* ---------- 联系 ---------- */
.contact { display: flex; gap: 40px; flex-wrap: wrap; align-items: flex-start; }
.contact__info { flex: 1; min-width: 260px; }
.contact__row { display: flex; gap: 14px; margin-bottom: 12px; align-items: center; }
.contact__row span { color: var(--text-dim); width: 48px; font-size: 0.9rem; }
.contact__row code {
  font-family: var(--mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  color: var(--accent);
}
.contact__tip { color: var(--text-dim); font-size: 0.86rem; margin-top: 8px; }
.contact__qr { text-align: center; }
.contact__qr img { width: 160px; height: 160px; border-radius: 10px; border: 1px solid var(--border); background: #fff; }
.contact__qr p { color: var(--text-dim); font-size: 0.85rem; margin-top: 8px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 28px 24px;
  color: var(--text-dim);
  font-size: 0.84rem;
}
.footer__beian { margin-top: 6px; font-family: var(--mono); }

/* ---------- 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- 导航 active 高亮 ---------- */
.nav__links a.active { color: var(--accent); }
.nav__links a.active::before { content: "> "; color: var(--accent); }

/* ---------- 复制按钮 ---------- */
.copy-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: none;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 8px;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.copy-btn:hover { border-color: var(--accent); }
.copy-btn.copied { color: #06140a; background: var(--accent); border-color: var(--accent); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--accent);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .3s, transform .3s, border-color .2s;
  z-index: 60;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { border-color: var(--accent); }

/* ---------- Toast 提示 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid var(--accent);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 10px 18px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 70;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: none;
  }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 8px 0; }
  .nav__toggle { display: block; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .about { flex-direction: column; align-items: center; text-align: center; }
  .about__stack { justify-content: center; }
}

/* ---------- 尊重系统「减少动态效果」 ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .terminal__cursor { display: none; }
  html { scroll-behavior: auto; }
}