:root {
  --ink: #e8e4dc;
  --muted: #9a9488;
  --bg: #14181f;
  --bg-2: #1c222c;
  --bg-3: #10141a;
  --line: #2a3140;
  --accent: #e85d04;
  --accent-2: #ff7a1a;
  --warn: #c2410c;
  --radius: 2px;
  --rail: 232px;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Mono", "Sarasa Mono SC", "Consolas", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { color: #ffd0a8; }
h1, h2, h3 { font-weight: 650; letter-spacing: 0.01em; line-height: 1.25; }
h1 { font-size: 1.85rem; margin: 0 0 0.6rem; }
h2 { font-size: 1.28rem; margin: 1.6rem 0 0.6rem; color: #f3efe6; }
p { margin: 0 0 1rem; color: #d5d0c6; }
ul { margin: 0 0 1rem; padding-left: 1.2rem; }

.frame {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  grid-template-rows: 1fr auto;
  min-height: 100dvh;
}

.site-head {
  grid-column: 1;
  grid-row: 1 / 3;
  position: sticky;
  top: 0;
  height: 100dvh;
  background: var(--bg-3);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 1.1rem 0.9rem 1.4rem;
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  margin-bottom: 1.2rem;
}
.brand img {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0c1016;
}
.brand span {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.nav-toggle {
  display: none;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}
.site-nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.site-nav a {
  color: var(--muted);
  padding: 0.48rem 0.55rem;
  border-left: 2px solid transparent;
  font-size: 0.92rem;
}
.site-nav a:hover,
.site-nav a.is-active {
  color: var(--ink);
  border-left-color: var(--accent);
  background: rgba(232, 93, 4, 0.08);
}
.rail-note {
  margin-top: auto;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.workspace { min-width: 0; }
.led {
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #6b2a08 40%, transparent);
}
.pad {
  padding: 1.4rem 1.8rem 2.4rem;
  max-width: 1080px;
}

.site-foot {
  grid-column: 2;
  border-top: 1px solid var(--line);
  background: var(--bg-3);
  padding: 1.4rem 1.8rem 2rem;
  color: var(--muted);
  font-size: 0.86rem;
}
.site-foot p { color: var(--muted); margin: 0 0 0.35rem; }
.foot-meta { display: flex; flex-wrap: wrap; gap: 0.6rem 1.2rem; }

.crumb {
  font-size: 0.86rem;
  color: var(--muted);
  margin: 0 0 1rem;
}
.crumb a { color: var(--muted); }
.byline {
  font-size: 0.86rem;
  color: var(--muted);
  margin-bottom: 1.1rem;
  font-family: var(--mono);
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 1.6rem;
}
.article-body img {
  margin: 0.4rem 0 1.1rem;
  border: 1px solid var(--line);
}
aside.related {
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 0.9rem 0.85rem 1rem;
  align-self: start;
  position: sticky;
  top: 1rem;
}
aside.related h2 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--accent-2);
}
aside.related a {
  display: block;
  color: var(--ink);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
aside.related a:last-child { border-bottom: 0; }

.cat-list { list-style: none; padding: 0; margin: 0; }
.cat-list li {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 0;
}
.cat-list a { color: var(--ink); font-weight: 600; }
.cat-list span { display: block; color: var(--muted); font-size: 0.86rem; font-weight: 400; }

.hero-desk {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.4rem;
  align-items: end;
  min-height: 0;
  padding-top: 0.4rem;
}
.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}
.lede { max-width: 42ch; }

.pack-lane {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.2rem;
  margin-top: 2.2rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 1rem;
}
.pack-lane img { width: 180px; height: 135px; object-fit: cover; }

.match-strip {
  margin-top: 2.2rem;
  overflow-x: auto;
  display: flex;
  gap: 0.8rem;
}
.match-chip {
  min-width: 210px;
  background: var(--bg-3);
  border: 1px solid var(--line);
  padding: 0.8rem;
}
.match-chip strong { display: block; color: var(--ink); }
.match-chip em { font-style: normal; color: var(--accent); font-family: var(--mono); font-size: 0.8rem; }

.device-board {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  grid-template-rows: auto auto;
  gap: 0.8rem;
}
.device-board .wide { grid-column: 1 / -1; }
.device-board figure { margin: 0; border: 1px solid var(--line); background: var(--bg-2); }
.device-board img { width: 100%; height: 220px; object-fit: cover; }
.device-board figcaption { padding: 0.6rem 0.8rem; color: var(--muted); font-size: 0.86rem; }

.steps {
  margin-top: 2.2rem;
  display: grid;
  gap: 0;
}
.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 0.8rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}
.step b {
  font-family: var(--mono);
  color: var(--accent);
}

.night-watch {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 0;
  border: 1px solid var(--line);
}
.night-watch img { height: 100%; object-fit: cover; min-height: 220px; }
.night-watch blockquote {
  margin: 0;
  padding: 1.3rem;
  background: var(--bg-2);
  font-size: 1.05rem;
}

.desk-feed {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1.2rem;
}
.feat {
  border: 1px solid var(--line);
  background: var(--bg-2);
}
.feat img { width: 100%; height: 210px; object-fit: cover; }
.feat div { padding: 0.9rem; }
.stack a {
  display: block;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.contact-band {
  margin-top: 2.2rem;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.contact-band h2 { margin-top: 0; font-size: 1rem; }

.faq-cut {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem 2rem;
}
.faq-cut dt { color: var(--ink); font-weight: 650; }
.faq-cut dd { margin: 0.3rem 0 1rem; color: var(--muted); }

.back-cat { margin-top: 1.6rem; }

@media (max-width: 768px) {
  .frame {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }
  .site-head {
    grid-column: 1;
    grid-row: 1;
    height: auto;
    position: sticky;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 0.6rem 0.8rem;
  }
  .brand { margin: 0; flex: 1; }
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none;
    width: 100%;
    padding-top: 0.6rem;
  }
  .site-head.is-open .site-nav { display: flex; }
  .rail-note { display: none; }
  .workspace, .site-foot { grid-column: 1; }
  .pad { padding: 1rem 0.9rem 1.8rem; }
  .hero-desk,
  .pack-lane,
  .device-board,
  .night-watch,
  .desk-feed,
  .contact-band,
  .faq-cut,
  .article-grid {
    grid-template-columns: 1fr;
  }
  .pack-lane img { width: 100%; height: 180px; }
  aside.related { position: static; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}