/* ═══════════════════════════════════════════════════════════════
   项目详情页样式（与主页同一套极简文字流）
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #fbfbf9;
  --ink: #16171b;
  --ink-2: #3f4148;
  --muted: #71737b;
  --faint: #9a9ca4;
  --line: #e3e3df;
  --line-soft: #eeeeea;
  --accent: #1f5fd0;
  --maxw: 800px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }

code {
  font-family: var(--mono);
  font-size: .875em;
  background: #f1f1ed;
  padding: 1px 5px;
  border-radius: 3px;
}

/* 顶部条 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 251, 249, .9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 15px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
}

.topbar .back { color: var(--muted); }
.topbar .back:hover { color: var(--ink); }

.topbar .tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--faint);
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 52px 24px 88px;
}

/* 标题区 */
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--faint);
  margin: 0 0 14px;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1.22;
  letter-spacing: -.025em;
  font-weight: 600;
}

.lede {
  margin: 0 0 30px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
  padding-left: 16px;
  border-left: 2px solid var(--ink);
}

/* 元信息 */
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0 0 10px;
}

.meta div { background: var(--bg); padding: 13px 0 13px 16px; }
.meta div:first-child { padding-left: 0; }

.meta dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--faint);
  margin-bottom: 3px;
}

.meta dd { font-size: 14.5px; font-weight: 500; }

/* 章节 */
section.doc {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
section.doc:first-of-type { border-top: none; }

.num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--faint);
  margin: 0 0 8px;
}

h2 {
  margin: 0 0 16px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
}

h3 {
  margin: 26px 0 8px;
  font-size: 16px;
  font-weight: 600;
}

h3:first-of-type { margin-top: 0; }

p { margin: 0 0 12px; color: var(--ink-2); }
p:last-child { margin-bottom: 0; }
strong { color: var(--ink); font-weight: 600; }

/* 能力块 */
.cap {
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}
.cap:first-of-type { border-top: none; padding-top: 0; }

.cap h3 {
  margin: 0 0 5px;
  font-size: 15.5px;
}

.cap p { margin: 0; font-size: 15px; }

/* 提示块 */
.note {
  margin: 16px 0;
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--line);
  font-size: 15px;
  color: var(--ink-2);
}

.note b { color: var(--ink); font-weight: 600; }

/* 技术栈：一行顿号分隔 */
.stack {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 2;
}

.stack span { white-space: nowrap; }
.stack span:not(:last-child)::after { content: "·"; color: var(--faint); margin: 0 8px; }

/* 页脚导航 */
.foot-nav {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  flex-wrap: wrap;
}

.foot-nav a { color: var(--muted); }
.foot-nav a:hover { color: var(--ink); }

@media (max-width: 680px) {
  body { font-size: 15.5px; }
  .topbar-inner, .wrap { padding-left: 20px; padding-right: 20px; }
  .wrap { padding-top: 32px; padding-bottom: 64px; }
  section.doc { padding: 30px 0; }
  .meta { grid-template-columns: 1fr 1fr; }
  .meta div { padding-left: 0; }
  .meta div:nth-child(n + 3) { border-top: 1px solid var(--line); }
}

@media print {
  body { background: #fff; font-size: 12px; }
  .topbar, .foot-nav { display: none; }
  section.doc { padding: 14px 0; }
  .cap, .note { break-inside: avoid; }
}