/* ============================================================
   练 · 打字 — style.css
   浅色「纸墨」主题 + 深色模式，极简、中文优先排版
   ============================================================ */

:root {
  --font-cn: "DingTalk JinBuTi", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", monospace;

  --bg: #faf9f7;
  --bg-soft: #f3f1ed;
  --card: #ffffff;
  --border: #e7e3dc;
  --border-strong: #d6d1c8;
  --ink: #1d1b18;
  --ink-2: #4a463f;
  --muted: #8b857a;
  --accent: #b4433a;
  --accent-soft: #f7e9e7;
  --accent-ink: #96382f;
  --ok: #2e7d4f;
  --shadow: 0 1px 2px rgba(29, 27, 24, .04), 0 8px 24px rgba(29, 27, 24, .05);
  --radius: 14px;
}

[data-theme="dark"] {
  --bg: #171513;
  --bg-soft: #201e1a;
  --card: #1e1c19;
  --border: #35322c;
  --border-strong: #45423b;
  --ink: #ece9e2;
  --ink-2: #c8c3b9;
  --muted: #948e82;
  --accent: #e0785f;
  --accent-soft: #3a2620;
  --accent-ink: #f0a48d;
  --ok: #6bbd8a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .2), 0 8px 24px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-cn);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
code, kbd, .mono { font-family: var(--font-mono); }

h1, h2, h3, h4 { line-height: 1.3; margin: 0; }

/* ============ 头部 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 28px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
}
.logo span { color: var(--ink); font-weight: 600; margin-left: 2px; }

.site-nav { display: flex; gap: 4px; margin-left: 10px; flex: none; }
.site-nav a {
  padding: 6px 14px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 14px;
}
.site-nav a:hover { background: var(--bg-soft); color: var(--ink); }

.theme-btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink-2);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  font-family: var(--font-cn);
  cursor: pointer;
}
.theme-btn:hover { border-color: var(--border-strong); color: var(--ink); }

/* ============ 布局 ============ */
main { max-width: 1060px; margin: 0 auto; padding: 0 24px 80px; }

.hero { padding: 64px 0 40px; text-align: center; }
.hero h1 { font-size: 34px; letter-spacing: 2px; }
.hero-sub { max-width: 720px; margin: 14px auto 0; color: var(--muted); }
.hero-badges { display: flex; justify-content: center; gap: 8px; margin-top: 20px; flex-wrap: wrap; }
.hero-badges span {
  font-size: 12px;
  color: var(--ink-2);
  border: 1px solid var(--border);
  background: var(--card);
  padding: 3px 12px;
  border-radius: 999px;
}

.section { padding-top: 48px; }
.section h2 { font-size: 22px; letter-spacing: 1px; margin-bottom: 6px; }
.sec-sub { color: var(--muted); margin: 0 0 20px; }

/* ============ 模式选择 ============ */
.mode-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 16px;
}
.mode-tab {
  flex: 1;
  min-width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-cn);
  transition: border-color .15s, transform .15s;
}
.mode-tab b { font-size: 15px; color: var(--ink); }
.mode-tab span { font-size: 11px; color: var(--muted); font-family: var(--font-mono); letter-spacing: .5px; }
.mode-tab:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.mode-tab.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.mode-tab.active b { color: var(--accent-ink); }
[data-theme="dark"] .mode-tab.active b { color: var(--accent-ink); }

/* ============ 练习面板 ============ */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.opt-group { display: flex; align-items: center; gap: 6px; }
.opt-group label { font-size: 13px; color: var(--muted); }
.opt-group select {
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  cursor: pointer;
}
.check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); cursor: pointer; user-select: none; }
.check input { accent-color: var(--accent); }
.flex-spacer { flex: 1; }

.btn {
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
}
.btn:hover { border-color: var(--border-strong); color: var(--ink); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { filter: brightness(1.06); color: #fff; }

/* 统计条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-bottom: 1px solid var(--border);
}
.stat {
  padding: 12px 8px 10px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat:last-child { border-right: none; }
.stat b { display: block; font-size: 20px; font-family: var(--font-mono); font-weight: 600; color: var(--ink); }
.stat span { font-size: 12px; color: var(--muted); }
.stat.best b { color: var(--accent); }

/* 练习舞台 */
.stage {
  position: relative;
  min-height: 168px;
  padding: 26px 26px 20px;
  overflow: auto;
}
.stage.shake { animation: shake .18s; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.start-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 2px;
  background: var(--card);
  z-index: 2;
}

.text-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: flex-end;
}
.unit {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: background .12s;
}
.u-char { font-size: 26px; line-height: 1.25; color: var(--ink-2); }
.u-hint {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: .5px;
  min-height: 14px;
}
.unit.done { opacity: .38; }
.unit.done .u-char { color: var(--ink-2); }
.unit.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.unit.active .u-char { color: var(--accent-ink); font-weight: 600; }
.unit.active .u-hint { color: var(--accent); }

/* 拼音模式 */
.compose { font-size: 24px; line-height: 1.5; min-height: 44px; }
.p-done { color: var(--ink); margin-right: 10px; }
.p-cur {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  color: var(--accent-ink);
  font-weight: 700;
  border-bottom: 2px solid var(--accent);
  margin-right: 14px;
  padding-bottom: 2px;
}
.p-py {
  font-size: 12px;
  font-weight: 400;
  font-family: var(--font-mono);
  color: var(--muted);
  letter-spacing: .5px;
}
.p-input { display: inline-flex; align-items: center; }
.p-buffer { font-family: var(--font-mono); font-size: 20px; color: var(--accent); }
.p-caret {
  display: inline-block;
  width: 2px;
  height: 24px;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: -4px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.p-syls { display: flex; gap: 8px; margin-top: 12px; min-height: 26px; }
.p-syl {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg-soft);
}
.p-syl.done { color: var(--ok); border-color: var(--ok); }
.p-syl.now { color: var(--accent-ink); border-color: var(--accent); background: var(--accent-soft); }

.candidates {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.cand {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-cn);
  font-size: 19px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 12px;
  cursor: pointer;
}
.cand:first-child { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-ink); }
.cand i {
  font-style: normal;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 4px;
}
.cand:hover { border-color: var(--accent); }
.cand-hint { font-size: 12px; color: var(--muted); margin-left: 4px; }

.mode-msg { min-height: 20px; margin-top: 8px; font-size: 13px; color: var(--accent); }

/* ============ 虚拟键盘 ============ */
.kb-wrap { padding: 4px 18px 16px; overflow-x: auto; }
.kb { display: flex; flex-direction: column; gap: 5px; min-width: 640px; }
.kb-row { display: flex; gap: 5px; }
.kb-key {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  height: 44px;
  min-width: 0;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-2);
  transition: background .1s, color .1s, transform .1s;
}
.kb-key-wide { font-size: 10px; color: var(--muted); }
.kb-sub { font-size: 9px; color: var(--muted); line-height: 1; }
.kb-has-sub .kb-main { font-size: 11px; }
.kb-key.kb-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(1px);
}
.kb-key.kb-active .kb-sub { color: rgba(255, 255, 255, .75); }

/* ============ 成绩卡 ============ */
.result-card {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 22px;
  animation: rise .25s ease;
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.result-card.hidden { display: none; }
.r-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.r-head h3 { font-size: 16px; }
.r-new {
  font-size: 12px;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 2px 10px;
  margin-left: 10px;
  vertical-align: 2px;
}
.r-stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.r-stats .stat { border-right: 1px solid var(--border); }
.r-err-list { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.r-err-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  background: var(--bg-soft);
}
.r-err-list b { font-size: 17px; color: var(--ink); }
.r-err-list code { color: var(--muted); font-size: 12px; }
.r-err-list span { color: var(--accent); font-size: 12px; }
.err-clean { color: var(--ok); border-color: var(--ok) !important; }

/* ============ 知识库 ============ */
.kn-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.kn-tab {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  cursor: pointer;
}
.kn-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.kn-body {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 26px;
}
.kn-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.kn-col h3 { font-size: 16px; margin-bottom: 10px; }
.kn-sub { color: var(--muted); font-size: 13px; margin: 0 0 16px; }
.kn-zone {
  font-size: 13px;
  color: var(--accent-ink);
  margin: 20px 0 8px;
  padding-left: 8px;
  border-left: 3px solid var(--accent);
}
.kn-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.kn-table td { padding: 5px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.kn-table-dense td { padding: 4px 6px; }
.kn-mnemonic { color: var(--ink); }
.kn-roots { color: var(--muted); font-size: 12px; }
.kn-rule { display: flex; gap: 10px; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.kn-rule b { flex: none; color: var(--ink); }
.kn-rule span { color: var(--muted); }
.kn-callout {
  margin-top: 16px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 13px;
}
.kn-callout b { color: var(--accent-ink); display: block; margin-bottom: 4px; }
.kn-callout p { margin: 0; color: var(--ink-2); }

.keycap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
}
.keycap-g { background: #fde8e8; } .keycap-f { background: #fdeee0; }
.keycap-d { background: #fdf3d8; } .keycap-s { background: #e9f6e3; }
.keycap-a { background: #e3f2fd; } .keycap-h { background: #f3e8fd; }
.keycap-j { background: #e8f6f3; } .keycap-k { background: #fdeef3; }
.keycap-l { background: #eef0e3; } .keycap-m { background: #f0e8e8; }
.keycap-t { background: #fde8f3; } .keycap-r { background: #e8f3fd; }
.keycap-e { background: #f3f0e8; } .keycap-w { background: #e8fdee; }
.keycap-q { background: #fdf0e8; } .keycap-y { background: #e8e6fd; }
.keycap-u { background: #f0e8fd; } .keycap-i { background: #e8fdfd; }
.keycap-o { background: #fde8e8; } .keycap-p { background: #e8fde8; }
.keycap-n { background: #eef0e8; } .keycap-b { background: #f0eafd; }
.keycap-v { background: #fde8f3; } .keycap-c { background: #e8f0f3; }
.keycap-x { background: #f3f0e8; }

.kn-jm { display: flex; flex-wrap: wrap; gap: 6px; }
.jm-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px 9px;
  background: var(--bg-soft);
}
.jm-item i {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #fff;
  background: var(--accent);
  border-radius: 4px;
  padding: 0 5px;
}

.kn-tips { margin: 8px 0; padding-left: 18px; color: var(--ink-2); font-size: 13px; }
.kn-tips li { margin: 5px 0; }

.kn-search {
  width: 100%;
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--ink);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 10px;
}
.kn-search:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.kn-lookup { max-height: 300px; overflow: auto; border: 1px solid var(--border); border-radius: 10px; }
.lk-char { font-size: 17px; color: var(--ink); }
.lk-full { color: var(--muted); }
.lk-empty { text-align: center; color: var(--muted); padding: 16px; }

/* 双拼 */
.kn-scheme-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.chip {
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.kn-scheme-head h3 { font-size: 17px; }
.kn-scheme-head p { color: var(--muted); font-size: 13px; margin: 6px 0; }
.kn-mnemonic-line { color: var(--accent-ink) !important; font-size: 14px !important; }
.kn-kb { margin: 16px 0; overflow-x: auto; }

/* 指法 */
.kn-legend { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.lg-item { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-2); }
.lg-item i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.kn-stage-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; margin-top: 10px; }
.kn-stage { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; background: var(--bg-soft); }
.kn-stage b { display: block; font-size: 13px; color: var(--ink); margin-bottom: 2px; }
.kn-stage span { font-size: 12px; color: var(--muted); }

/* 笔画示例 */
.st-examples { display: flex; flex-wrap: wrap; gap: 10px; }
.st-example {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 12px;
  background: var(--bg-soft);
}
.st-example b { font-size: 20px; }
.st-example code { color: var(--accent); font-size: 13px; }
.st-name { font-weight: 600; }

/* ============ 键盘图鉴 ============ */
.guide-sec { margin-bottom: 28px; }
.guide-sec h3 { font-size: 16px; margin-bottom: 12px; }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.guide-grid-2 { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }
.guide-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  transition: border-color .15s, transform .15s;
}
.guide-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.guide-card b { font-size: 14px; color: var(--ink); }
.guide-card p { margin: 6px 0 0; font-size: 12.5px; color: var(--muted); }
.guide-card-wide { grid-column: 1 / -1; }
.guide-card-img { grid-column: span 1; }
.guide-card-img .dg-photo { margin-top: 12px; }
.kn-callout .kn-tips { margin: 6px 0 0; }
.kn-callout .kn-tips b { color: var(--ink); }
.g-meta { font-size: 11px; color: var(--accent-ink); font-family: var(--font-mono); margin-top: 3px; }

/* 示意图（内联 SVG） */
.dg-holder:empty { display: none; }
.dg { display: block; width: 100%; height: auto; margin: 10px 0 4px; }

/* 键盘俯视图（真实几何渲染） */
.kb-shell { fill: #2c2c30; stroke: #16161a; stroke-width: 1.2; }
.kb-base { fill: #d9d9de; stroke: #a8a8b0; stroke-width: .8; }
.kb-cap { fill: #f4f4f6; stroke: #c6c6cc; stroke-width: .6; }
.kb-key-label { fill: #3a3a40; font-family: var(--font-mono); text-anchor: middle; }
.kb-key-label.dim { fill: #8e8e96; }
.kb-zone { fill: none; stroke: var(--accent); stroke-width: 1.4; stroke-dasharray: 5 3; opacity: .85; }
.kb-zone-tag { fill: var(--card); stroke: var(--accent); stroke-width: 1; opacity: .96; }
.kb-zone-label { font-size: 10.5px; fill: var(--accent-ink); font-family: var(--font-cn); }
[data-theme="dark"] .kb-zone { stroke: #e0785f; }
[data-theme="dark"] .kb-zone-label { fill: #f0a48d; }

/* 配列大卡片：图占主位，参数在侧 */
.layout-list { display: flex; flex-direction: column; gap: 14px; }
.layout-row {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  transition: border-color .15s;
}
.layout-row:hover { border-color: var(--border-strong); }
.layout-row .dg { margin: 0; }
.layout-meta b { font-size: 15px; color: var(--ink); }
.layout-meta .g-meta { margin: 4px 0 8px; }
.layout-meta p { margin: 8px 0 0; font-size: 13px; color: var(--muted); }
@media (max-width: 820px) {
  .layout-row { grid-template-columns: 1fr; gap: 12px; }
}
[data-theme="dark"] .kb-shell { fill: #17171a; stroke: #0d0d0f; }
[data-theme="dark"] .kb-base { fill: #35353a; stroke: #4a4a51; }
[data-theme="dark"] .kb-cap { fill: #44444b; stroke: #5a5a62; }
[data-theme="dark"] .kb-key-label { fill: #d8d8de; }
[data-theme="dark"] .kb-key-label.dim { fill: #8e8e96; }
[data-theme="dark"] .kb-zone { stroke: #e0785f; }
[data-theme="dark"] .kb-zone-label { fill: #e0785f; }

/* 轴体/键帽/结构剖面 */
.dg-cap-face { fill: #f0f0f3; stroke: #b6b6bd; stroke-width: .8; }
.dg-cap-side { fill: #d3d3d9; stroke: #a5a5ad; stroke-width: .8; }
.dg-contact { fill: none; stroke: #c9a227; stroke-width: 2; }
.dg-bump { fill: none; stroke: #8a857a; stroke-width: 1.6; }
.dg-pin { fill: #c9a227; stroke: #8f7419; stroke-width: .6; }
.dg-pcb { fill: #2f6b45; stroke: #215034; stroke-width: .8; }
.dg-case-top { fill: #b9bdc4; stroke: #8d949d; stroke-width: .8; }
.dg-cap-mini { fill: #eceef1; stroke: #b6b6bd; stroke-width: .6; }
.dg-dim.dash { stroke-dasharray: 3 3; }
[data-theme="dark"] .dg-cap-face { fill: #4a4a51; stroke: #6d757e; }
[data-theme="dark"] .dg-cap-side { fill: #3a3a40; stroke: #5a5a62; }
[data-theme="dark"] .dg-cap-mini { fill: #44444b; stroke: #6d757e; }
[data-theme="dark"] .dg-case-top { fill: #454a50; stroke: #6d757e; }
[data-theme="dark"] .dg-pcb { fill: #2b5c3c; stroke: #1d442c; }

.g-zones {
  font-size: 11.5px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 3px 8px;
  margin: 8px 0 0;
  line-height: 1.5;
}

/* 写实渲染图 */
.swatch {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 3px;
  vertical-align: -1px;
  margin-right: 5px;
  border: 1px solid rgba(0, 0, 0, .18);
}
.photo-note {
  font-size: 11.5px;
  color: var(--muted);
  margin: 2px 0 0;
  line-height: 1.5;
}
.dg-key { fill: var(--bg-soft); stroke: var(--border-strong); stroke-width: .6; }
.dg-label { font-size: 8.5px; fill: var(--muted); font-family: var(--font-cn); }
.dg-label.dim { opacity: .85; }
.dg-anno { font-size: 8.5px; fill: var(--ink-2); font-family: var(--font-cn); }
.dg-tick { font-size: 8px; fill: var(--muted); font-family: var(--font-mono); text-anchor: middle; }
.dg-tick.end { text-anchor: end; }
.dg-axis { stroke: var(--border-strong); stroke-width: 1; fill: none; }
.dg-axis-label { font-size: 8px; fill: var(--muted); text-anchor: middle; font-family: var(--font-cn); }
.dg-grid { stroke: var(--border); stroke-width: .5; }
.dg-baseline { stroke: var(--border-strong); stroke-width: 1; stroke-dasharray: 4 3; }
.dg-tick.start { text-anchor: start; }
.dg-curve { fill: none; stroke-width: 2; stroke-linecap: round; }
.dg-curve.linear { stroke: #b4413a; }
.dg-curve.tactile { stroke: #8a5a34; }
.dg-curve.clicky { stroke: #3d7ea6; }
.dg-housing { fill: #cfd3d8; stroke: #9aa2ab; stroke-width: .8; }
.dg-keycap { fill: #e8eaee; stroke: #9aa2ab; stroke-width: .8; }
.dg-stem { stroke: rgba(0, 0, 0, .2); stroke-width: .6; }
.dg-spring { fill: none; stroke: #8a857a; stroke-width: 1.4; }
.dg-leaf { fill: #b9c0c9; stroke: #7d858f; stroke-width: .6; }
.dg-clickbar { fill: #d8b26a; stroke: #a9853f; stroke-width: .6; }
.dg-case { fill: #dfe1e5; stroke: #9aa2ab; stroke-width: 1; }
.dg-plate { fill: #c7cbd1; stroke: #8d949d; stroke-width: 1; }
.dg-gasket { fill: #b4413a; opacity: .8; }
.dg-foam { fill: #e3e6ea; stroke: #b6bcc4; stroke-width: .6; }
.dg-screw { fill: #7d858f; }
.dg-dim { stroke: var(--muted); stroke-width: .8; }
.dg-cap-a { fill: #e6e9ee; stroke: #9aa2ab; stroke-width: .8; }
.dg-cap-b { fill: #dde3ea; stroke: #8d949d; stroke-width: .8; }
.dg-cap-c { fill: #e9e2d6; stroke: #a99a80; stroke-width: .8; }
.dg-cap-d { fill: #e2eee4; stroke: #8fae96; stroke-width: .8; }

[data-theme="dark"] .dg-housing { fill: #4a4f55; stroke: #6d757e; }
[data-theme="dark"] .dg-keycap { fill: #565c63; stroke: #6d757e; }
[data-theme="dark"] .dg-case { fill: #454a50; stroke: #6d757e; }
[data-theme="dark"] .dg-plate { fill: #3d4248; stroke: #636b74; }
[data-theme="dark"] .dg-leaf { fill: #6d757e; stroke: #8a939c; }
[data-theme="dark"] .dg-foam { fill: #3a3f45; stroke: #5a616a; }
[data-theme="dark"] .dg-spring { stroke: #9aa2ab; }
[data-theme="dark"] .dg-cap-a { fill: #4d5259; stroke: #6d757e; }
[data-theme="dark"] .dg-cap-b { fill: #454b52; stroke: #656d76; }
[data-theme="dark"] .dg-cap-c { fill: #4e4940; stroke: #7a7060; }
[data-theme="dark"] .dg-cap-d { fill: #404b44; stroke: #647a6c; }

/* ============ 部署 ============ */
.deploy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.deploy-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.dep-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.dep-head b { font-size: 16px; }
.dep-head span { font-size: 11px; color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 2px 10px; white-space: nowrap; }
.dep-steps { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.dep-cmd code {
  display: block;
  font-size: 12.5px;
  color: var(--ink);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  overflow-x: auto;
  white-space: nowrap;
}
.deploy-card p { margin: 0; font-size: 12.5px; color: var(--muted); }

/* ============ 页脚 ============ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
}

/* ============ 响应式 ============ */
@media (max-width: 860px) {
  .kn-cols { grid-template-columns: 1fr; gap: 8px; }
  .site-header { gap: 14px; padding: 10px 16px; }
  .hero { padding: 40px 0 28px; }
  .hero h1 { font-size: 26px; }
  .stats-bar { grid-template-columns: repeat(3, 1fr); }
  .stat:nth-child(3) { border-right: none; }
  .r-stats { grid-template-columns: repeat(2, 1fr); }
  .stage { padding: 18px 16px 14px; }
  .u-char { font-size: 22px; }
}

/* ============ 站外入口 ============ */
.site-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; flex: none; }
.site-link {
  font-size: 13px;
  color: var(--ink-2);
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.site-link:hover { background: var(--bg-soft); border-color: var(--border); color: var(--ink); }
.gh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--ink-2);
  background: var(--card);
  transition: border-color .15s, transform .15s, color .15s;
}
.gh-btn:hover { border-color: var(--border-strong); color: var(--ink); transform: translateY(-1px); }

/* ============ 关于 ============ */
.about-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}
.about-card p { margin: 0 0 12px; font-size: 14px; line-height: 1.85; color: var(--ink-2); }
.about-card strong { color: var(--ink); }
.about-card a { color: var(--accent-ink); border-bottom: 1px solid var(--accent-soft); }
.about-card a:hover { border-bottom-color: var(--accent); }
.about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 10px 20px;
  margin: 16px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--border);
  list-style: none;
}
.about-facts li { font-size: 13px; color: var(--muted); }
.about-facts b { color: var(--ink); font-weight: 600; margin-right: 8px; }

/* ============ 常见问题 ============ */
.faq-list {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.faq-item { padding: 16px 22px; border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 14.5px; color: var(--ink); margin: 0 0 6px; }
.faq-item p { margin: 0; font-size: 13.5px; line-height: 1.8; color: var(--muted); }

/* ============ 页脚链接 ============ */
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12.5px;
}
.footer-links a { color: var(--ink-2); }
.footer-links a:hover { color: var(--accent); }
.footer-links span { color: var(--border-strong); }

@media (max-width: 700px) {
  .site-nav { display: none; }
}
@media (max-width: 640px) {
  .site-link { display: none; }
}