:root {
  --bg: #0b0e14;
  --bg-soft: #111621;
  --panel: #151b28;
  --panel-2: #1a2130;
  --line: #243043;
  --line-soft: #1c2432;
  --fg: #e6ebf4;
  --fg-dim: #9aa8bd;
  --fg-faint: #6b7893;
  --accent: #3ac251;
  --accent-2: #2bae7e;
  --accent-3: #1481bf;
  --warn: #f0b429;
  --danger: #ef6461;
  --radius: 14px;
  --maxw: 1000px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* 页面顶部的渐变光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto 0;
  height: 460px;
  background:
    radial-gradient(60% 100% at 50% 0%, rgba(58, 194, 81, 0.16), transparent 70%),
    radial-gradient(40% 80% at 80% 8%, rgba(20, 129, 191, 0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent-3); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 顶部导航 ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(11, 14, 20, 0.82);
  border-bottom: 1px solid var(--line-soft);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand svg { width: 24px; height: 24px; display: block; }

.nav-spacer { flex: 1; }

.nav a.link {
  color: var(--fg-dim);
  font-size: 14.5px;
}
.nav a.link:hover { color: var(--fg); text-decoration: none; }

/* ---------- Hero ---------- */

.hero { padding: 72px 0 40px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 22px;
}

.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(58, 194, 81, 0.18);
}

h1 {
  font-size: clamp(34px, 5.2vw, 52px);
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  font-weight: 700;
}

.grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2) 45%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  font-size: 18.5px;
  color: var(--fg-dim);
  max-width: 62ch;
  margin: 0 0 30px;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 560;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--fg);
  transition: border-color .16s, transform .16s, background .16s;
}
.btn:hover { text-decoration: none; border-color: #33425c; transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #06210f;
  border-color: transparent;
  font-weight: 650;
}
.btn-primary:hover { filter: brightness(1.07); }

/* ---------- 安装命令块 ---------- */

.code-block {
  position: relative;
  background: #080b11;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 18px;
}
.code-block pre { margin: 0; }
.code-block code {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: #d7e2f2;
  white-space: pre;
}
.code-block .pfx { color: var(--accent); }

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--fg-dim);
  cursor: pointer;
  font-family: inherit;
  transition: color .15s, border-color .15s;
}
.copy-btn:hover { color: var(--fg); border-color: #33425c; }
.copy-btn.done { color: var(--accent); border-color: rgba(58,194,81,.5); }

/* ---------- 章节 ---------- */

section { padding: 44px 0; }

h2 {
  font-size: 27px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  font-weight: 660;
}
h3 {
  font-size: 19px;
  margin: 32px 0 10px;
  font-weight: 620;
}
.sub {
  color: var(--fg-dim);
  margin: 0 0 26px;
  max-width: 68ch;
}

.rule { height: 1px; background: var(--line-soft); border: 0; margin: 0; }

/* ---------- 卡片网格 ---------- */

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 800px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color .16s, transform .16s;
}
.card:hover { border-color: var(--line); transform: translateY(-2px); }

.card h4 { margin: 0 0 6px; font-size: 16.5px; font-weight: 620; }
.card p { margin: 0; color: var(--fg-dim); font-size: 14.5px; line-height: 1.7; }

.card .kicker {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
  letter-spacing: .02em;
}

/* 项目卡片（首页） */
.project {
  display: block;
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 26px;
  color: inherit;
}
.project:hover {
  text-decoration: none;
  border-color: #33425c;
  transform: translateY(-2px);
}
.project-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.project-head svg { width: 38px; height: 38px; flex: none; }
.project-head h3 { margin: 0; font-size: 21px; }
.project p { margin: 0 0 16px; color: var(--fg-dim); }
.project .ver {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 9px;
}

/* ---------- 表格 ---------- */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-soft);
  margin-bottom: 18px;
}

table { border-collapse: collapse; width: 100%; font-size: 14.5px; min-width: 620px; }

th {
  text-align: left;
  font-weight: 600;
  color: var(--fg-dim);
  font-size: 13px;
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.015);
  white-space: nowrap;
}

td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: rgba(255,255,255,.018); }

td code, th code, p code, li code, dd code {
  font-family: var(--mono);
  font-size: 12.8px;
  background: rgba(255,255,255,.055);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ---------- 徽章 ---------- */

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  white-space: nowrap;
}
.badge.green { color: var(--accent); border-color: rgba(58,194,81,.42); background: rgba(58,194,81,.09); }
.badge.blue  { color: #56b6ef; border-color: rgba(20,129,191,.45); background: rgba(20,129,191,.1); }
.badge.warn  { color: var(--warn); border-color: rgba(240,180,41,.4); background: rgba(240,180,41,.09); }
.badge.gray  { color: var(--fg-faint); }

/* ---------- 提示框 ---------- */

.note {
  border-left: 3px solid var(--accent-3);
  background: rgba(20,129,191,.07);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  margin: 18px 0;
  font-size: 14.5px;
  color: var(--fg-dim);
}
.note strong { color: var(--fg); }
.note.warn { border-left-color: var(--warn); background: rgba(240,180,41,.07); }
.note.ok { border-left-color: var(--accent); background: rgba(58,194,81,.07); }

/* ---------- 统计条 ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 8px 0 10px;
}
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.stat {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 16px 18px;
}
.stat .n {
  font-size: 25px;
  font-weight: 680;
  letter-spacing: -0.02em;
  display: block;
  background: linear-gradient(100deg, var(--accent), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat .l { font-size: 13px; color: var(--fg-faint); }

/* ---------- 页脚 ---------- */

footer {
  border-top: 1px solid var(--line-soft);
  margin-top: 40px;
  padding: 30px 0 46px;
  color: var(--fg-faint);
  font-size: 14px;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; }
footer a { color: var(--fg-dim); }

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}
.toc a {
  font-size: 13.5px;
  color: var(--fg-dim);
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 999px;
  padding: 5px 13px;
}
.toc a:hover { text-decoration: none; color: var(--fg); border-color: var(--line); }