@charset "utf-8";
/* MovePith — 模板代号 MP-STRATA-02
   设计主干：把本站的核心资产「四层机制」做成可见的分类系统。
   六个分类色（四层 + 方法 + 参与）承担全站色彩，交互色单独留给蓝色，两套不混用。 */

:root {
  /* 阅读面 */
  --paper: #f4f5f7;
  --card: #ffffff;
  --ink: #0d1117;
  --ink-2: #39414d;
  --muted: #6b7480;
  --rule: #dbe0e6;
  --rule-soft: #e9ecf0;

  /* 深色底盘：页眉、首屏、页脚 */
  --chrome: #0d1117;
  --chrome-2: #171d26;
  --chrome-ink: #e9edf2;
  --chrome-muted: #8d97a5;
  --chrome-rule: #262e3a;

  /* 交互色（只用于链接与按钮，不参与分类） */
  --link: #0f5bd1;
  --link-2: #0a4099;

  /* 分类色：地层色阶 */
  --l1: #8a6d3b;
  --l2: #2f6f6a;
  --l3: #b3401f;
  --l4: #4a3f8f;
  --lm: #3f4a56;
  --ls: #1f6b3a;
  --lyr: var(--lm);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Noto Sans Mono CJK SC", monospace;

  --shell: 74rem;
  --measure: 44rem;
  --rail: 14rem;
  --gap: 3rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1319;
    --card: #161c24;
    --ink: #e9edf2;
    --ink-2: #c3cad3;
    --muted: #8d97a5;
    --rule: #2a323d;
    --rule-soft: #212832;
    --chrome: #080b0f;
    --chrome-2: #121821;
    --chrome-rule: #232b36;
    --link: #6b9dff;
    --link-2: #a8c4ff;
    --l1: #cfa969;
    --l2: #6fb8b0;
    --l3: #ef8055;
    --l4: #a396ec;
    --lm: #9aa6b4;
    --ls: #6dc08c;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* 页面最顶端的四层色脊：全站统一签名 */
body::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg,
    var(--l1) 0 25%, var(--l2) 25% 50%, var(--l3) 50% 75%, var(--l4) 75% 100%);
}

img { max-width: 100%; height: auto; }

a { color: var(--link); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--link-2); }

::selection { background: var(--ink); color: var(--paper); }

.shell { width: min(100% - 2.5rem, var(--shell)); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 20;
  background: var(--link); color: #fff; padding: 0.6rem 1rem;
}
.skip:focus { left: 0; }

:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; }

/* ---------------------------------------------------------------- 分类色 */

.lyr-l1 { --lyr: var(--l1); }
.lyr-l2 { --lyr: var(--l2); }
.lyr-l3 { --lyr: var(--l3); }
.lyr-l4 { --lyr: var(--l4); }
.lyr-m  { --lyr: var(--lm); }
.lyr-s  { --lyr: var(--ls); }
.lyr-all { --lyr: var(--ink); }

.chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em;
  padding: 0.12rem 0.5rem;
  color: var(--lyr);
  border: 1px solid currentColor;
  border-radius: 999px;
  white-space: nowrap;
}
.chip b { font-weight: 700; }

.badge {
  display: inline-block;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em;
  padding: 0.14rem 0.5rem;
  background: var(--ink); color: var(--paper);
  border-radius: 2px;
}

.kicker {
  display: inline-block;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.16em;
  color: var(--lyr); text-transform: uppercase;
}

/* ------------------------------------------------------------ 页眉/页脚 */

.site-head { background: var(--chrome); color: var(--chrome-ink); }
.head-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.25rem; padding: 0.85rem 0; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; color: inherit; }
.brand-mark {
  width: 1.15rem; height: 1.15rem; flex: none;
  background:
    linear-gradient(var(--l1) 0 0) 0 0 / 100% 22% no-repeat,
    linear-gradient(var(--l2) 0 0) 0 33% / 100% 22% no-repeat,
    linear-gradient(var(--l3) 0 0) 0 66% / 100% 22% no-repeat,
    linear-gradient(var(--l4) 0 0) 0 100% / 100% 22% no-repeat;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text b { font-size: 1.05rem; font-weight: 700; letter-spacing: 0.02em; }
.brand-text small {
  font-family: var(--mono); font-size: 0.68rem;
  letter-spacing: 0.1em; color: var(--chrome-muted);
}

.site-nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--chrome-muted); text-decoration: none;
  font-size: 0.92rem; padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: #fff; }
.site-nav a[aria-current="page"] { color: #fff; border-bottom-color: var(--l3); }

.site-foot {
  margin-top: 5rem; background: var(--chrome); color: var(--chrome-muted);
  padding: 3rem 0 2.5rem; font-size: 0.9rem;
}
.foot-top { display: grid; gap: 2.5rem; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
.foot-brand { margin: 0 0 0.5rem; font-size: 1.15rem; font-weight: 700; color: var(--chrome-ink); }
.foot-about p { margin: 0 0 0.5rem; }
.foot-about a { color: var(--chrome-ink); }
.foot-rules { margin: 1.5rem 0 0; padding: 0; list-style: none; }
.foot-rules li {
  padding: 0.35rem 0 0.35rem 2.2rem; position: relative;
  border-top: 1px solid var(--chrome-rule); font-size: 0.85rem;
}
.foot-rules li::before {
  content: counter(rule, decimal-leading-zero);
  counter-increment: rule;
  position: absolute; left: 0; top: 0.35rem;
  font-family: var(--mono); font-size: 0.72rem; color: var(--l3);
}
.foot-rules { counter-reset: rule; }
.foot-links { display: grid; grid-template-columns: repeat(2, minmax(6rem, 1fr)); gap: 0.4rem 1.5rem; align-content: start; }
.foot-links a { color: var(--chrome-muted); text-decoration: none; font-size: 0.88rem; }
.foot-links a:hover { color: #fff; }
.foot-links .foot-h {
  grid-column: 1 / -1; font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.16em; color: #5d6878; margin-bottom: 0.2rem;
}
.foot-note {
  margin: 2.5rem 0 0; padding-top: 1.25rem; border-top: 1px solid var(--chrome-rule);
  font-size: 0.8rem; line-height: 1.75; color: #78828f;
}
.foot-copy { margin: 0.75rem 0 0; font-family: var(--mono); font-size: 0.75rem; color: #5d6878; }

/* -------------------------------------------------------------------- 排版 */

h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--ink); letter-spacing: -0.01em; }

.prose { width: min(100%, var(--measure)); margin-inline: auto; }
.prose > * { margin-inline: auto; }

.page-head { padding: 3.5rem 0 0; }
.page-head h1 { font-size: clamp(1.75rem, 1.1rem + 2.6vw, 2.6rem); margin: 0.6rem 0 1rem; }
.page-head .lede { font-size: 1.08rem; color: var(--ink-2); margin: 0 0 1rem; }

.meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center;
  font-family: var(--mono); font-size: 0.76rem; color: var(--muted);
  padding: 0.8rem 0; margin: 1.5rem 0 2.5rem;
  border-top: 2px solid var(--lyr); border-bottom: 1px solid var(--rule);
}

/* 正文小节：左侧留白里的序号 */
article { counter-reset: sec fig; }
article h2 {
  counter-increment: sec;
  font-size: 1.4rem; margin: 3.5rem 0 1.1rem; padding-top: 1rem;
  border-top: 1px solid var(--rule); position: relative;
  scroll-margin-top: 1.5rem;
}
article h2::before {
  content: counter(sec, decimal-leading-zero);
  position: absolute; top: 1.05rem; left: -4.5rem;
  font-family: var(--mono); font-size: 0.78rem; font-weight: 400;
  color: var(--lyr); letter-spacing: 0.04em;
}
article h3 { font-size: 1.1rem; margin: 2.2rem 0 0.6rem; }
article h3::before { content: "— "; color: var(--lyr); }
article h4 { font-size: 0.98rem; margin: 1.6rem 0 0.4rem; color: var(--ink-2); }
article p { margin: 0 0 1.15rem; }
article ul, article ol { margin: 0 0 1.35rem; padding-left: 1.35rem; }
article li { margin-bottom: 0.55rem; }
article li::marker { color: var(--lyr); font-family: var(--mono); font-size: 0.9em; }

strong { font-weight: 600; color: var(--ink); }
code {
  font-family: var(--mono); font-size: 0.87em;
  background: var(--rule-soft); padding: 0.12em 0.35em; border-radius: 3px;
}
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

blockquote {
  margin: 1.75rem 0; padding: 0.9rem 1.2rem;
  background: var(--card); border-left: 3px solid var(--ink);
  color: var(--ink-2); font-size: 1.02rem;
}
blockquote p:last-child { margin-bottom: 0; }

/* -------------------------------------------------------- 正文里的组件 */

.toc {
  margin: 0 0 2.5rem; padding: 1rem 1.2rem;
  background: var(--card); border: 1px solid var(--rule);
  border-top: 2px solid var(--lyr);
}
.toc-title {
  margin: 0 0 0.6rem; font-family: var(--mono);
  font-size: 0.7rem; letter-spacing: 0.16em; color: var(--muted);
}
.toc ol { margin: 0; padding: 0; list-style: none; counter-reset: toc; font-size: 0.9rem; }
.toc li { counter-increment: toc; margin-bottom: 0.35rem; padding-left: 2rem; position: relative; }
.toc li::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute; left: 0; top: 0;
  font-family: var(--mono); font-size: 0.72rem; color: var(--muted);
}
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--link); }

.note, .warn, .tip {
  position: relative;
  margin: 2rem 0; padding: 1.1rem 1.25rem 1.1rem;
  background: var(--card); border: 1px solid var(--rule);
  border-left: 3px solid var(--l2);
  font-size: 0.96rem;
}
.warn { border-left-color: var(--l3); }
.tip { border-left-color: var(--ls); }
.note > :last-child, .warn > :last-child, .tip > :last-child { margin-bottom: 0; }
.note p, .warn p, .tip p { margin-bottom: 0.65rem; }
.note b, .warn b, .tip b {
  display: block; margin-bottom: 0.35rem;
  font-size: 0.82rem; letter-spacing: 0.04em;
  font-family: var(--mono); color: var(--l2);
}
.warn b { color: var(--l3); }
.tip b { color: var(--ls); }

.steps { list-style: none; margin: 2rem 0; padding: 0; counter-reset: step; }
.steps > li {
  counter-increment: step; position: relative;
  padding: 0 0 1.6rem 3.2rem; margin: 0;
  border-left: 1px solid var(--rule); margin-left: 1.1rem;
}
.steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: -1.1rem; top: -0.1rem;
  width: 2.2rem; height: 2.2rem; display: grid; place-items: center;
  font-family: var(--mono); font-size: 0.8rem;
  background: var(--paper); color: var(--lyr);
  border: 1px solid var(--lyr); border-radius: 50%;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps h3 { margin: 0.15rem 0 0.45rem; font-size: 1.02rem; }
.steps h3::before { content: none; }
.steps p:last-child { margin-bottom: 0; }

figure { margin: 2.25rem 0; }
figure img {
  display: block; width: 100%;
  border: 1px solid var(--rule); background: var(--card);
}
figcaption {
  margin-top: 0.6rem; padding-left: 0.9rem;
  border-left: 2px solid var(--rule);
  font-size: 0.82rem; color: var(--muted); line-height: 1.65;
}
figcaption::before {
  counter-increment: fig;
  content: "图 " counter(fig, decimal-leading-zero) " ";
  font-family: var(--mono); color: var(--lyr); margin-right: 0.35rem;
}

.table-wrap {
  overflow-x: auto; margin: 2rem 0;
  border: 1px solid var(--rule); background: var(--card);
}
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
caption {
  caption-side: bottom; padding: 0.7rem 0.9rem;
  font-size: 0.78rem; color: var(--muted); text-align: left;
  border-top: 1px solid var(--rule-soft);
}
th, td { padding: 0.65rem 0.85rem; text-align: left; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
thead th {
  background: var(--rule-soft);
  font-family: var(--mono); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.06em; color: var(--ink-2); white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
td strong { font-weight: 600; }

details.qa {
  border: 1px solid var(--rule); background: var(--card);
  padding: 0.85rem 1.1rem; margin-bottom: 0.6rem;
}
details.qa summary {
  cursor: pointer; font-weight: 600; color: var(--ink);
  list-style: none; display: flex; gap: 0.7rem; align-items: baseline;
}
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::before {
  content: "Q"; font-family: var(--mono); font-size: 0.78rem;
  color: var(--lyr); border: 1px solid currentColor;
  padding: 0 0.3rem; border-radius: 2px; flex: none;
}
details.qa[open] summary { margin-bottom: 0.6rem; }
details.qa p { margin: 0 0 0.6rem; color: var(--ink-2); font-size: 0.94rem; padding-left: 1.7rem; }
details.qa p:last-child { margin-bottom: 0; }

.cta {
  margin: 2.5rem 0; padding: 1.5rem;
  background: var(--chrome); color: var(--chrome-ink);
  border-left: 4px solid var(--l3);
}
.cta h3 { margin: 0 0 0.6rem; font-size: 1.08rem; color: #fff; }
.cta p { margin: 0 0 1rem; font-size: 0.94rem; color: var(--chrome-muted); }
.cta p:last-child { margin-bottom: 0; }
.cta a:not(.btn) { color: #fff; }

.btn {
  display: inline-block; padding: 0.62rem 1.4rem;
  background: var(--link); color: #fff; text-decoration: none;
  font-size: 0.94rem; border: 1px solid var(--link); border-radius: 3px;
}
.btn:hover { background: var(--link-2); border-color: var(--link-2); color: #fff; }
.btn-quiet { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-quiet:hover { background: transparent; border-color: var(--ink); color: var(--ink); }

.related { margin: 3.5rem 0 0; padding-top: 1.5rem; border-top: 2px solid var(--ink); }
.related h2 { font-size: 0.8rem; margin: 0 0 1rem; padding: 0; border: 0;
  font-family: var(--mono); letter-spacing: 0.16em; color: var(--muted); }
.related h2::before { content: none; }
.related ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.9rem; }
.related li { margin: 0; padding-left: 1rem; border-left: 2px solid var(--rule); }
.related a { display: block; font-weight: 600; text-decoration: none; color: var(--ink); }
.related a:hover { color: var(--link); }
.related span { display: block; font-size: 0.84rem; color: var(--muted); line-height: 1.6; }

.byline {
  margin: 3rem 0 0; padding: 1.2rem 1.3rem;
  background: var(--card); border: 1px solid var(--rule);
  font-size: 0.86rem; color: var(--ink-2);
}
.byline p { margin: 0 0 0.55rem; }
.byline p:last-child { margin-bottom: 0; }
.byline b {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.14em;
  color: var(--muted);
}

/* 文章页：宽屏时目录变成左侧常驻栏 */
@media (min-width: 1180px) {
  body.page-article .prose { width: min(100%, calc(var(--rail) + var(--gap) + var(--measure))); }
  body.page-article .page-head { padding-left: calc(var(--rail) + var(--gap)); }
  body.page-article article {
    display: grid;
    grid-template-columns: var(--rail) minmax(0, var(--measure));
    column-gap: var(--gap);
    align-items: start;
  }
  body.page-article article > * { grid-column: 2; }
  body.page-article article > .toc {
    grid-column: 1; grid-row: 1 / -1;
    position: sticky; top: 1.5rem; margin: 0;
    font-size: 0.86rem;
  }
  body.page-article article h2::before { left: -3.2rem; }
}

/* ------------------------------------------------------------------ 列表页 */

.cards { list-style: none; margin: 2rem 0 0; padding: 0; counter-reset: idx; display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.card {
  counter-increment: idx;
  position: relative; padding: 1.5rem 1.5rem 1.4rem 4.2rem;
  background: var(--paper);
}
.card::before {
  content: counter(idx, decimal-leading-zero);
  position: absolute; left: 1.5rem; top: 1.55rem;
  font-family: var(--mono); font-size: 0.82rem; color: var(--lyr);
}
.card::after {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--lyr);
}
.card:hover { background: var(--card); }
.card-top { margin: 0 0 0.5rem; display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.card h3 { margin: 0 0 0.45rem; font-size: 1.12rem; }
.card h3::before, .related h3::before, .byline h3::before { content: none; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--link); }
.card-desc { margin: 0 0 0.6rem; color: var(--ink-2); font-size: 0.92rem; }
.card-meta { margin: 0; font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }

@media (min-width: 900px) {
  .cards { grid-template-columns: 1fr 1fr; }
}

/* -------------------------------------------------------------------- 首页 */

.hero {
  background: var(--chrome); color: var(--chrome-ink);
  padding: 3.5rem 0 3rem;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.028) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.028) 0 1px, transparent 1px 64px);
}
.hero-grid { display: grid; gap: 2.5rem; grid-template-columns: minmax(0, 1fr); }
.hero .kicker { color: var(--l3); }
.hero h1 {
  font-size: clamp(2.1rem, 1.2rem + 4vw, 3.6rem);
  margin: 0.7rem 0 1rem; line-height: 1.15; color: #fff;
  letter-spacing: -0.02em;
}
.hero .lede { font-size: 1.05rem; color: #aab4c2; max-width: 34rem; margin: 0 0 1.6rem; }
.hero .lede strong { color: #fff; }
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: center; }
.hero .btn-quiet { color: #fff; border-color: #39424f; }
.hero .btn-quiet:hover { border-color: #fff; color: #fff; }

/* 首屏邀请码面板 */
.invite {
  position: relative; margin: 1.6rem 0 0; padding: 1.1rem 1.2rem;
  max-width: 30rem;
  background: var(--chrome-2); border: 1px solid var(--chrome-rule);
}
.invite::before, .invite::after {
  content: ""; position: absolute; width: 10px; height: 10px; border: 1px solid var(--l3);
}
.invite::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.invite::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
.invite-label {
  margin: 0 0 0.5rem; font-family: var(--mono);
  font-size: 0.68rem; letter-spacing: 0.16em; color: var(--chrome-muted);
}
.invite-row { margin: 0 0 0.6rem; display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.invite-row code {
  font-family: var(--mono); font-size: 1.25rem; font-weight: 700;
  letter-spacing: 0.14em; padding: 0.2rem 0.7rem;
  background: transparent; color: #fff; border: 1px dashed var(--l3);
}
.copy-btn {
  font: inherit; font-family: var(--mono); font-size: 0.8rem;
  padding: 0.4rem 0.9rem; cursor: pointer;
  border: 1px solid var(--l3); background: var(--l3); color: #fff; border-radius: 3px;
}
.copy-btn:hover { filter: brightness(1.12); }
.invite-note { margin: 0 0 0.45rem; font-size: 0.84rem; color: #aab4c2; }
.invite-foot { margin: 0; font-size: 0.74rem; color: #78828f; line-height: 1.6; }
.invite-foot a { color: #aab4c2; }

/* 首屏地层图：本站的签名组件 */
.strata { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--chrome-rule); }
.strata li { border-bottom: 1px solid var(--chrome-rule); }
.strata a {
  display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); align-items: baseline;
  gap: 0.9rem; padding: 0.95rem 0.6rem 0.95rem 0.9rem;
  text-decoration: none; color: var(--chrome-ink);
  border-left: 3px solid var(--lyr); background: transparent;
}
.strata a:hover { background: rgba(255,255,255,0.045); color: #fff; }
.strata .s-id { font-family: var(--mono); font-size: 0.78rem; color: var(--lyr); }
.strata .s-name { font-weight: 600; font-size: 0.98rem; display: block; }
.strata .s-desc { display: block; font-size: 0.82rem; color: #8d97a5; line-height: 1.6; margin-top: 0.15rem; }

@media (min-width: 960px) {
  .hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 3.5rem; align-items: start; }
}

.home-section { padding: 3.5rem 0 0; counter-increment: home; }
.home-section > h2 {
  font-size: 1.25rem; margin: 0; padding: 0 0 0.5rem 2.4rem;
  border-bottom: 2px solid var(--ink); display: block; position: relative;
}
.home-section > h2::before {
  content: "§" counter(home);
  position: absolute; left: 0; top: 0.15rem;
  font-family: var(--mono); font-size: 0.8rem; font-weight: 400; color: var(--l3);
}
main { counter-reset: home; }
.home-section > .section-note { margin: 0.9rem 0 0; color: var(--muted); font-size: 0.92rem; }

.grid-2 { display: grid; gap: 1.5rem 2rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.mini { border-top: 2px solid var(--lyr); padding-top: 0.85rem; }
.mini h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.mini h3 a { color: var(--ink); text-decoration: none; }
.mini h3 a:hover { color: var(--link); }
.mini p { margin: 0; font-size: 0.87rem; color: var(--muted); line-height: 1.7; }
.mini .card-top { margin-bottom: 0.4rem; }

/* -------------------------------------------------------------------- 工具 */

.calc {
  margin: 2rem 0; padding: 1.5rem;
  background: var(--card); border: 1px solid var(--rule); border-top: 3px solid var(--ink);
}
.calc fieldset { border: 0; margin: 0 0 1.25rem; padding: 0; }
.calc legend {
  padding: 0; font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.16em; color: var(--muted); margin-bottom: 0.8rem;
}
.field-grid { display: grid; gap: 0.9rem 1.25rem; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); }
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field label { font-size: 0.85rem; color: var(--ink-2); }
.field input, .field select {
  font: inherit; font-size: 0.95rem; padding: 0.55rem 0.65rem;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 3px; width: 100%;
}
.field input { font-family: var(--mono); }
.field input:focus, .field select:focus { border-color: var(--link); outline: none; }
.field .hint { font-size: 0.75rem; color: var(--muted); }
.calc-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.calc-actions button {
  font: inherit; font-size: 0.9rem; padding: 0.5rem 1.2rem; cursor: pointer;
  border: 1px solid var(--link); background: var(--link); color: #fff; border-radius: 3px;
}
.calc-actions button.ghost { background: transparent; color: var(--link); }
.calc-actions button:hover { filter: brightness(1.08); }

.result { border-top: 1px solid var(--rule); padding-top: 1.2rem; }
.result-grid { display: grid; gap: 1rem 1.5rem; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); margin: 0; }
.stat { border-left: 2px solid var(--rule); padding-left: 0.8rem; }
.stat dt { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); margin: 0 0 0.2rem; letter-spacing: 0.04em; }
.stat dd { margin: 0; font-family: var(--mono); font-size: 1.2rem; font-weight: 700; color: var(--ink); }
.stat.is-key { border-left-color: var(--l3); }
.stat.is-key dd { color: var(--l3); }
.result-note { margin: 1.2rem 0 0; font-size: 0.82rem; color: var(--muted); line-height: 1.7; }
.result-error { color: var(--l3); font-size: 0.86rem; margin: 0.75rem 0 0; font-family: var(--mono); }

.layer-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1.4rem; }
.layer-tabs button {
  font: inherit; font-family: var(--mono); font-size: 0.82rem;
  padding: 0.42rem 0.9rem; cursor: pointer;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink-2);
  border-radius: 3px;
}
.layer-tabs button[aria-selected="true"] {
  border-color: var(--ink); color: #fff; background: var(--ink);
}
.layer-panel h3 { margin: 0 0 0.6rem; font-size: 1.06rem; }
.layer-panel h3::before { content: none; }
.layer-panel h4 {
  margin: 1.3rem 0 0.35rem; font-family: var(--mono); font-size: 0.74rem;
  letter-spacing: 0.12em; color: var(--muted);
}
.layer-panel ul { margin: 0 0 1rem; padding-left: 1.3rem; font-size: 0.92rem; }
.layer-panel p { font-size: 0.94rem; margin-bottom: 0.8rem; }

.timeline { list-style: none; margin: 2.5rem 0; padding: 0; }
.timeline > li {
  padding: 0 0 1.8rem 1.4rem; border-left: 2px solid var(--rule); position: relative;
}
.timeline > li::before {
  content: ""; position: absolute; left: -0.42rem; top: 0.5rem;
  width: 0.7rem; height: 0.7rem; background: var(--paper);
  border: 2px solid var(--l4); border-radius: 50%;
}
.timeline time { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.08em; color: var(--muted); }
.timeline h3 { margin: 0.25rem 0 0.55rem; font-size: 1.04rem; }
.timeline h3::before { content: none; }
.timeline p { margin: 0 0 0.6rem; font-size: 0.91rem; }
.timeline .dispute {
  font-size: 0.87rem; color: var(--ink-2);
  border-left: 3px solid var(--l3); background: var(--card);
  padding: 0.7rem 0.9rem; margin-bottom: 0;
}

.glossary { margin: 2rem 0; }
.glossary dt {
  font-weight: 700; margin-top: 1.4rem; font-size: 1rem;
  padding-bottom: 0.2rem; border-bottom: 1px solid var(--rule);
}
.glossary dd { margin: 0.4rem 0 0; font-size: 0.92rem; color: var(--ink-2); }
.glossary .misread {
  color: var(--l3); font-size: 0.86rem; padding-left: 0.9rem;
  border-left: 2px solid var(--l3); margin-top: 0.5rem;
}

/* ------------------------------------------------------------------ 移动端 */

@media (max-width: 900px) {
  .foot-top { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .head-inner { padding: 0.7rem 0; }
  .site-nav { gap: 1.1rem; width: 100%; }
  /* 首屏：邀请码面板必须排在内容按钮之前，尽量留在第一屏内 */
  .hero { padding: 1.5rem 0 2rem; }
  .hero-col { display: flex; flex-direction: column; }
  .hero h1 { margin: 0.5rem 0 0.75rem; }
  .hero .lede { font-size: 0.95rem; margin-bottom: 1rem; }
  .hero .invite { margin-top: 0; }
  .hero-actions { order: 2; margin-top: 1.25rem; }
  .hero-grid { gap: 1.75rem; }
  .strata a { padding: 0.8rem 0.5rem 0.8rem 0.8rem; }
  .page-head { padding-top: 2.25rem; }
  .card { padding: 1.25rem 1.1rem 1.2rem 3.4rem; }
  .card::before { left: 1.1rem; }
  article h2 { margin-top: 2.75rem; }
  article h2::before { position: static; display: block; margin-bottom: 0.15rem; }
  .calc { padding: 1.1rem; }
  .steps > li { padding-left: 2.9rem; }
  details.qa p { padding-left: 0; }
}

@media print {
  body::before { display: none; }
  .site-nav, .site-foot, .toc, .cta, .related { display: none; }
  body { background: #fff; color: #000; font-size: 12pt; }
  a { text-decoration: none; color: #000; }
}

/* ------------------------------------------------------ 实时数据工具组件 */

.live-bar {
  display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap;
  margin: 0 0 1.25rem; padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
}
.live-bar button {
  font: inherit; font-family: var(--mono); font-size: 0.82rem;
  padding: 0.42rem 1rem; cursor: pointer;
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  border-radius: 3px;
}
.live-bar button:disabled { opacity: 0.5; cursor: progress; }
.live-stamp { font-family: var(--mono); font-size: 0.76rem; color: var(--muted); }
.live-dot {
  width: 0.5rem; height: 0.5rem; border-radius: 50%;
  background: var(--ls); display: inline-block; margin-right: 0.35rem;
}
.live-dot.is-stale { background: var(--l3); }

.heat { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule);
  grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr)); }
.heat-cell { padding: 0.7rem 0.7rem 0.65rem; background: var(--card); }
.heat-sym { font-family: var(--mono); font-size: 0.78rem; color: inherit; opacity: 0.85; }
.heat-val { font-family: var(--mono); font-size: 1.1rem; font-weight: 700; margin: 0.15rem 0 0; }
.heat-price { font-family: var(--mono); font-size: 0.72rem; opacity: 0.75; margin: 0.1rem 0 0; }

.legend { display: flex; gap: 1rem; flex-wrap: wrap; margin: 1rem 0 0;
  font-family: var(--mono); font-size: 0.74rem; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend i { width: 0.9rem; height: 0.9rem; display: inline-block; border: 1px solid var(--rule); }

.diag {
  margin: 1.75rem 0 0; padding: 1.1rem 1.25rem;
  background: var(--card); border: 1px solid var(--rule); border-left: 3px solid var(--lyr);
}
.diag h3 { margin: 0 0 0.5rem; font-size: 1rem; }
.diag h3::before { content: none; }
.diag p { margin: 0 0 0.6rem; font-size: 0.94rem; }
.diag p:last-child { margin-bottom: 0; }
.diag .diag-read { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }

.datatable { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.datatable th, .datatable td { padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--rule-soft); text-align: right; }
.datatable th:first-child, .datatable td:first-child { text-align: left; }
.datatable thead th { background: var(--rule-soft); font-family: var(--mono); font-size: 0.72rem; white-space: nowrap; }
.datatable td { font-family: var(--mono); }
.datatable td.pos { color: var(--l2); }
.datatable td.neg { color: var(--l3); }

/* ---------------------------------------------------------------- 语言切换 */
/* 只有该页面存在其它语种版本时才会出现在页眉里 */

.lang-switch { display: flex; gap: 0.5rem; align-items: center; }
.lang-switch a {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.04em;
  color: var(--chrome-muted); text-decoration: none;
  padding: 0.15rem 0.55rem; border: 1px solid var(--chrome-rule); border-radius: 999px;
}
.lang-switch a:hover { color: #fff; border-color: #4a5563; }
.lang-switch a[aria-current="true"] { color: #fff; border-color: var(--l3); }

@media (max-width: 640px) {
  .lang-switch { width: 100%; }
}