:root {
  --zf-paper: #eef0e2;
  --zf-ink: #1f2a1d;
  --zf-cin: #b8322a;
  --zf-cin-soft: rgba(184, 50, 42, .5);
  --zf-line: #cfd3b8;
  --zf-surf: #f8f9f1;
  --zf-mute: #4c5848;
  --zf-r-lg: 12px;
  --zf-r-sm: 2px;
  --zf-latin: Garamond, "Sabon", "Times New Roman", serif;
  --zf-kai: "Kaiti SC", "STKaiti", "KaiTi", serif;
  --zf-sans: "PingFang SC", "Microsoft YaHei", sans-serif;
  --zf-mono: Consolas, "Courier New", monospace;
}

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

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

body {
  margin: 0;
  background: var(--zf-paper);
  color: var(--zf-ink);
  font-family: var(--zf-sans);
  font-size: 17px;
  line-height: 1.85;
}

a { color: var(--zf-ink); text-decoration-color: var(--zf-cin-soft); text-underline-offset: .22em; }
a:hover { color: var(--zf-cin); }
:focus-visible { outline: 3px solid var(--zf-cin); outline-offset: 2px; border-radius: var(--zf-r-sm); }

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

.zf-skip {
  position: absolute; left: 12px; top: -60px; z-index: 20;
  background: var(--zf-ink); color: var(--zf-surf);
  padding: 10px 16px; border-radius: var(--zf-r-sm);
}
.zf-skip:focus { top: 10px; color: var(--zf-surf); }

.zf-wrap { max-width: 1160px; margin: 0 auto; padding: 0 32px; }

/* 页头 */
.zf-top { border-bottom: 1px solid var(--zf-line); background: var(--zf-paper); }
.zf-top-in {
  max-width: 1160px; margin: 0 auto; padding: 10px 32px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.zf-brand { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.zf-mark { display: block; }
.zf-nav-ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.zf-nav-ul a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px;
  text-decoration: none; font-size: 16px; border-radius: var(--zf-r-sm);
}
.zf-nav-ul a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--zf-cin); }

/* 首页 */
.zf-home { padding-top: 34px; padding-bottom: 24px; }
.zf-h1 {
  font-family: var(--zf-kai);
  font-weight: 400;
  font-size: 76px;
  line-height: 1.12;
  letter-spacing: .02em;
  margin: 0 0 26px;
  line-break: strict;
}
.zf-keep { display: inline-block; }

.zf-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 392px;
  grid-template-rows: auto auto auto 1fr;
  grid-template-areas:
    "lead sign"
    "idx sign"
    "idx pick"
    "idx .";
  column-gap: 64px;
}
.zf-hero-lead { grid-area: lead; margin: 0 0 18px; font-size: 18px; max-width: 34em; color: var(--zf-mute); }
.zf-hero-sign { grid-area: sign; }
.zf-pick { grid-area: pick; }
.zf-index { grid-area: idx; }

.zf-index-h {
  font-family: var(--zf-kai); font-weight: 400; font-size: 22px; margin: 0 0 6px;
  display: flex; align-items: baseline; gap: 12px;
}
.zf-index-h span { font-family: var(--zf-sans); font-size: 14px; color: var(--zf-mute); }
.zf-idx { list-style: none; margin: 0; padding: 0; }
.zf-idx-li {
  display: grid; grid-template-columns: 6.2em minmax(0, 1fr); align-items: baseline;
  border-bottom: 1px dashed var(--zf-line);
}
.zf-idx-no {
  font-family: var(--zf-latin); color: var(--zf-cin); font-size: 21px;
  text-align: right; padding: 9px 16px 9px 0; border-right: 2px solid var(--zf-cin);
  font-variant-numeric: lining-nums;
}
.zf-idx-say {
  padding: 9px 0 9px 18px;
  text-decoration-line: underline; text-decoration-color: var(--zf-cin-soft);
  text-decoration-thickness: 1.5px; text-underline-offset: .42em;
}
.zf-idx-src { font-size: 14px; color: var(--zf-mute); margin: 12px 0 0; }

/* 签名栏 */
.zf-sign {
  background: var(--zf-surf);
  border: 1px solid var(--zf-line);
  border-radius: var(--zf-r-lg);
  padding: 20px 24px 18px;
}
.zf-sign-h { font-family: var(--zf-kai); font-size: 22px; margin: 0 0 8px; display: flex; align-items: baseline; gap: 10px; }
.zf-sign-h span { font-family: var(--zf-sans); font-size: 14px; color: var(--zf-mute); }
.zf-sign-row {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: end; gap: 12px;
  padding-bottom: 6px; border-bottom: 1.5px solid var(--zf-ink);
}
.zf-sign-lab { font-size: 14px; color: var(--zf-mute); padding-bottom: 6px; }
.zf-sign-code {
  font-family: var(--zf-latin); font-size: 38px; line-height: 1.1; letter-spacing: .1em;
  color: var(--zf-ink); background: none; padding: 0; user-select: all;
}
.zf-copy {
  font: inherit; font-size: 15px; min-height: 44px; min-width: 64px; padding: 0 14px;
  color: var(--zf-cin); background: transparent; border: 1.5px solid var(--zf-cin);
  border-radius: var(--zf-r-sm); cursor: pointer;
}
.zf-copy:hover, .zf-copy-done { background: var(--zf-cin); color: var(--zf-surf); }
.zf-sign-gain { margin: 12px 0 2px; font-size: 16px; line-height: 1.6; }
.zf-sign-gain sup { color: var(--zf-cin); }
.zf-sign-fn { margin: 0; font-size: 13px; line-height: 1.6; color: var(--zf-mute); }
.zf-sign-act { margin: 14px 0 6px; }
.zf-sign-go {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px;
  background: var(--zf-cin); color: var(--zf-surf); text-decoration: none;
  border-radius: var(--zf-r-sm); font-size: 16px;
}
.zf-sign-go:hover { background: #962820; color: var(--zf-surf); }
.zf-sign-dis, .zf-sign-more { margin: 8px 0 0; font-size: 14px; line-height: 1.65; color: var(--zf-mute); }

/* 编者推荐 */
.zf-pick { margin-top: 22px; padding: 14px 0 0; border-top: 1px solid var(--zf-ink); }
.zf-pick-k { font-family: var(--zf-kai); font-size: 18px; color: var(--zf-cin); margin: 0; }
.zf-pick-t { margin: 2px 0 4px; font-size: 19px; font-weight: 600; line-height: 1.5; line-break: strict; overflow-wrap: anywhere; }
.zf-pick-d { margin: 0; font-size: 15px; color: var(--zf-mute); line-height: 1.7; }

.zf-home-body { max-width: 46em; margin-top: 56px; }
.zf-home-body h2, .zf-h2 {
  font-family: var(--zf-kai); font-weight: 400; font-size: 32px; line-height: 1.3;
  margin: 46px 0 12px; line-break: strict;
}
.zf-home-body ul { padding-left: 1.3em; }
.zf-home-body li { margin: 4px 0; }

.zf-shelf { max-width: 46em; margin-top: 30px; }
.zf-shelf-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--zf-line); }
.zf-shelf-li { padding: 16px 0; border-bottom: 1px solid var(--zf-line); }
.zf-shelf-a { font-size: 20px; font-weight: 600; line-break: strict; overflow-wrap: anywhere; }
.zf-shelf-d { margin: 4px 0; color: var(--zf-mute); font-size: 15px; }
.zf-shelf-m { margin: 0; font-size: 14px; color: var(--zf-mute); font-family: var(--zf-sans); }
.zf-shelf-more a { display: inline-flex; align-items: center; min-height: 44px; }

/* 面包屑 */
.zf-crumbs ol { list-style: none; display: flex; flex-wrap: wrap; margin: 12px 0 0; padding: 0; font-size: 14px; }
.zf-crumbs li { display: inline-flex; align-items: center; color: var(--zf-mute); }
.zf-crumbs li + li::before { content: "/"; margin: 0 8px; color: var(--zf-line); }
.zf-crumbs a { display: inline-flex; align-items: center; min-height: 44px; color: var(--zf-mute); }

/* 文章 */
.zf-artwrap { padding-bottom: 40px; }
.zf-art { max-width: 1000px; }
.zf-art > .zf-cover, .zf-art > .zf-toc { max-width: 760px; }
.zf-seg { display: inline-block; max-width: 100%; }
.zf-art-head { margin: 14px 0 22px; }
.zf-art-h1 {
  font-family: var(--zf-kai); font-weight: 400; font-size: 44px; line-height: 1.25;
  margin: 0 0 14px; line-break: strict;
}
.zf-art-meta { margin: 0; font-size: 14px; color: var(--zf-mute); display: flex; flex-wrap: wrap; gap: 4px 22px; }
.zf-cover { margin: 0 0 26px; }
.zf-cover img { display: block; width: 100%; border: 1px solid var(--zf-line); border-radius: var(--zf-r-lg); }
.zf-cover figcaption, .zf-shot figcaption { font-size: 14px; color: var(--zf-mute); margin-top: 8px; line-height: 1.6; }

.zf-toc {
  background: var(--zf-surf); border: 1px solid var(--zf-line); border-radius: var(--zf-r-lg);
  padding: 16px 22px 12px; margin: 0 0 30px;
}
.zf-toc-h { font-family: var(--zf-kai); font-size: 20px; margin: 0 0 4px; }
.zf-toc-ol { margin: 0; padding-left: 1.6em; }
.zf-toc-ol li { margin: 2px 0; }
.zf-toc-ol li::marker { font-family: var(--zf-latin); color: var(--zf-cin); }
.zf-toc-ol a { display: block; padding: 10px 0; min-height: 44px; box-sizing: border-box; line-height: 1.55; text-decoration: none; }
.zf-toc-ol a:hover { text-decoration: underline; }

.zf-prose { max-width: 38em; overflow-wrap: break-word; }
.zf-prose p { margin: 0 0 1.05em; }
.zf-prose h2 {
  font-family: var(--zf-kai); font-weight: 400; font-size: 31px; line-height: 1.32;
  margin: 2.1em 0 .6em; padding-top: .7em; border-top: 1px solid var(--zf-line); line-break: strict;
}
.zf-prose h3 { font-size: 19px; line-height: 1.5; margin: 1.6em 0 .5em; }
.zf-prose ul, .zf-prose ol { padding-left: 1.4em; margin: 0 0 1.05em; }
.zf-prose li { margin: .3em 0; }
.zf-prose strong { font-weight: 700; }
.zf-prose code {
  font-family: var(--zf-mono); font-size: .9em; background: var(--zf-surf);
  border: 1px solid var(--zf-line); border-radius: var(--zf-r-sm); padding: 1px 5px; word-break: break-all;
}
.zf-prose blockquote { margin: 1em 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--zf-line); color: var(--zf-mute); }

.zf-clause {
  margin: 1.4em 0 .5em; padding: 12px 18px 10px;
  border-left: 3px solid var(--zf-cin); background: var(--zf-surf);
  border-radius: 0 var(--zf-r-sm) var(--zf-r-sm) 0;
}
.zf-clause-no { margin: 0 0 4px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.zf-clause-num { font-family: var(--zf-latin); color: var(--zf-cin); font-size: 22px; }
.zf-clause-ver { font-size: 13px; color: var(--zf-mute); }
.zf-clause-kind { font-size: 13px; border: 1px solid var(--zf-line); border-radius: var(--zf-r-sm); padding: 0 6px; }
.zf-clause-txt { font-family: var(--zf-kai); font-size: 19px; line-height: 1.75; }
.zf-clause-txt p { margin: 0; }
.zf-prose .zf-plain { padding-left: 21px; margin-bottom: 1.4em; }

.zf-shot { margin: 1.4em 0 1.6em; }
.zf-shot img { display: block; border: 1px solid var(--zf-line); border-radius: var(--zf-r-sm); margin: 0 auto; }
.zf-shot.zf-narrow img { max-width: 384px; width: 100%; }

.zf-tbl { overflow-x: auto; margin: 1em 0 1.4em; border: 1px solid var(--zf-line); border-radius: var(--zf-r-sm); }
.zf-tbl table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 15px; line-height: 1.65; }
.zf-tbl th, .zf-tbl td { padding: 9px 12px; border-bottom: 1px solid var(--zf-line); text-align: left; vertical-align: top; }
.zf-tbl th { background: var(--zf-surf); font-weight: 600; }
.zf-tbl tr:last-child td { border-bottom: 0; }
.zf-al-center { text-align: center; }
.zf-al-right { text-align: right; }

.zf-prose .zf-sign { margin: 1.4em 0 1.8em; }
.zf-prose .zf-sign-code {
  font-family: var(--zf-latin); font-size: 38px; line-height: 1.1; letter-spacing: .1em;
  background: none; border: 0; padding: 0; word-break: normal;
}
.zf-prose .zf-sign p { margin: 0; }
.zf-prose .zf-sign .zf-sign-gain { margin: 12px 0 2px; }
.zf-prose .zf-sign .zf-sign-act { margin: 14px 0 6px; }
.zf-prose .zf-sign .zf-sign-dis { margin-top: 8px; }

.zf-faq { max-width: 38em; margin-top: 2.6em; }
.zf-faq h2 {
  font-family: var(--zf-kai); font-weight: 400; font-size: 31px; margin: 0 0 .4em;
  padding-top: .7em; border-top: 1px solid var(--zf-line);
}
.zf-faq-it { padding: 6px 0 4px; border-bottom: 1px dashed var(--zf-line); }
.zf-faq-q { font-size: 18px; margin: .7em 0 .3em; line-height: 1.55; }
.zf-faq-a { margin: 0 0 .8em; }

.zf-next { max-width: 38em; margin-top: 2.4em; padding: 18px 22px; background: var(--zf-surf); border-radius: var(--zf-r-lg); border: 1px solid var(--zf-line); }
.zf-next-h { font-family: var(--zf-kai); font-size: 20px; margin: 0 0 6px; }
.zf-tags { margin: 0 0 6px; font-size: 15px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.zf-tags-k { color: var(--zf-mute); }
.zf-tag { border: 1px solid var(--zf-line); border-radius: var(--zf-r-sm); padding: 1px 8px; background: var(--zf-paper); }
.zf-next-ul { margin: 0; padding-left: 1.2em; }
.zf-next-ul a { display: inline-block; padding: 11px 0; min-height: 44px; box-sizing: border-box; line-height: 1.5; }

/* 站务页、列表、搜索 */
.zf-desk { padding-bottom: 48px; }
.zf-desk-h1 {
  font-family: var(--zf-kai); font-weight: 400; font-size: 48px; line-height: 1.25;
  margin: 10px 0 18px; line-break: strict;
}
.zf-desk-date { font-size: 14px; color: var(--zf-mute); margin-top: 2em; }
.zf-lst-pg { font-size: .5em; margin-left: .6em; color: var(--zf-mute); }
.zf-lst-count { font-size: 14px; color: var(--zf-mute); margin: 0 0 6px; }
.zf-lst-list { list-style: none; margin: 0; padding: 0; max-width: 46em; border-top: 1px solid var(--zf-line); }
.zf-lst-li { padding: 16px 0; border-bottom: 1px solid var(--zf-line); }
.zf-lst-a { font-size: 21px; font-weight: 600; line-height: 1.5; line-break: strict; overflow-wrap: anywhere; }
.zf-lst-d { margin: 4px 0; color: var(--zf-mute); font-size: 15px; }
.zf-lst-m { margin: 0; font-size: 14px; color: var(--zf-mute); }
.zf-pages { display: flex; gap: 18px; align-items: center; margin-top: 18px; }
.zf-pages a { display: inline-flex; align-items: center; min-height: 44px; }

.zf-find-form { max-width: 38em; margin: 6px 0 10px; }
.zf-find-lab { display: block; font-size: 15px; color: var(--zf-mute); margin-bottom: 4px; }
.zf-find-row { display: flex; gap: 8px; }
.zf-find-in {
  flex: 1; min-width: 0; min-height: 46px; font: inherit; font-size: 16px; padding: 0 12px;
  border: 1.5px solid var(--zf-ink); border-radius: var(--zf-r-sm); background: var(--zf-surf); color: var(--zf-ink);
}
.zf-find-btn {
  min-height: 46px; padding: 0 18px; font: inherit; font-size: 16px;
  background: var(--zf-ink); color: var(--zf-surf); border: 0; border-radius: var(--zf-r-sm); cursor: pointer;
}
.zf-find-state { color: var(--zf-mute); font-size: 15px; }
.zf-find-out { max-width: 38em; padding-left: 1.4em; }
.zf-find-li { margin: 0 0 14px; }
.zf-find-li a { font-size: 18px; font-weight: 600; }
.zf-find-li p { margin: 2px 0 0; font-size: 15px; color: var(--zf-mute); }

/* 页脚 */
.zf-foot { margin-top: 56px; border-top: 1px solid var(--zf-line); background: var(--zf-surf); }
.zf-foot-in { max-width: 1160px; margin: 0 auto; padding: 26px 32px 30px; font-size: 14px; color: var(--zf-mute); }
.zf-foot-say { margin: 6px 0; max-width: 44em; line-height: 1.75; }
.zf-foot-say a { display: inline-block; padding: 12px 2px; margin: -12px 0; }
.zf-foot-nav ul { list-style: none; margin: 10px 0 4px; padding: 0; display: flex; flex-wrap: wrap; gap: 0 4px; }
.zf-foot-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 10px 0 0; color: var(--zf-ink); }
.zf-foot-rss { margin: 4px 0; }
.zf-foot-rss a { display: inline-flex; align-items: center; min-height: 44px; }
.zf-foot-c { margin: 4px 0 0; font-family: var(--zf-sans); }

@media (prefers-reduced-motion: no-preference) {
  .zf-copy, .zf-sign-go { transition: background-color .15s ease, color .15s ease; }
}

@media (max-width: 980px) {
  .zf-hero {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
    grid-template-areas: "lead" "sign" "pick" "idx";
  }
  .zf-index { margin-top: 36px; }
  .zf-h1 { font-size: 58px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.8; }
  .zf-wrap { padding: 0 16px; }
  .zf-top-in { padding: 4px 16px 0; flex-direction: column; align-items: flex-start; gap: 0; }
  .zf-nav { width: 100%; }
  .zf-nav-ul { gap: 0; justify-content: space-between; }
  .zf-nav-ul a { padding: 0 8px; font-size: 15px; }
  .zf-nav-ul li:first-child a { padding-left: 0; }
  .zf-home { padding-top: 16px; }
  .zf-h1 { font-size: 40px; line-height: 1.18; margin-bottom: 12px; }
  .zf-hero-lead { font-size: 15px; line-height: 1.7; margin-bottom: 12px; }
  .zf-sign { padding: 12px 14px 12px; }
  .zf-sign-h { font-size: 19px; margin-bottom: 4px; }
  .zf-sign-code, .zf-prose .zf-sign-code { font-size: 30px; letter-spacing: .06em; }
  .zf-sign-row { gap: 8px; }
  .zf-sign-gain { font-size: 15px; margin-top: 8px; }
  .zf-sign-more { font-size: 13px; }
  .zf-pick { margin-top: 14px; padding-top: 10px; }
  .zf-pick-k { font-size: 16px; }
  .zf-pick-t { font-size: 17px; }
  .zf-pick-d { font-size: 14px; }
  .zf-idx-li { grid-template-columns: 5em minmax(0, 1fr); }
  .zf-idx-no { font-size: 18px; padding-right: 10px; }
  .zf-idx-say { padding-left: 12px; font-size: 15px; }
  .zf-home-body h2, .zf-h2 { font-size: 26px; }
  .zf-art-h1 { font-size: 30px; }
  .zf-desk-h1 { font-size: 32px; }
  .zf-prose h2, .zf-faq h2 { font-size: 24px; }
  .zf-clause { padding: 10px 12px 8px; }
  .zf-clause-txt { font-size: 17px; }
  .zf-prose .zf-plain { padding-left: 15px; }
  .zf-toc { padding: 12px 14px 8px; }
  .zf-foot-in { padding: 22px 16px 26px; }
}