:root {
  --bz-paper: #cfdbe4;
  --bz-ink: #17232d;
  --bz-tomato: #e2502f;
  --bz-tomato-deep: #a8381c;
  --bz-cream: #fff1b8;
  --bz-line: #b4c4d1;
  --bz-surface: #f7fafc;
  --bz-mute: #4a5a66;
  --bz-blush: #f9d3c6;
  --bz-r-big: 34px;
  --bz-r-small: 17px;
  --bz-cjk: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  --bz-latin: "Berlin Sans FB", "Trebuchet MS", sans-serif;
  --bz-gutter: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bz-paper);
  color: var(--bz-ink);
  font-family: var(--bz-cjk);
  font-size: 16px;
  line-height: 1.8;
  overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bz-ink); text-decoration-color: var(--bz-tomato); text-decoration-thickness: 2px; text-underline-offset: 4px; }
a:hover { color: var(--bz-tomato-deep); }
:focus-visible { outline: 3px solid var(--bz-tomato-deep); outline-offset: 3px; border-radius: 6px; }
code { font-family: var(--bz-latin); }

.bz-skip {
  position: absolute; left: 12px; top: -80px; z-index: 9;
  background: var(--bz-ink); color: var(--bz-cream);
  padding: 12px 18px; border-radius: var(--bz-r-small); min-height: 44px;
}
.bz-skip:focus { top: 12px; }

/* 页头 */
.bz-top { background: var(--bz-paper); }
.bz-top-in {
  max-width: 1180px; margin: 0 auto; padding: 10px var(--bz-gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.bz-home { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.bz-mark { display: block; width: 124px; height: 34px; }
.bz-tabs ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.bz-tabs a {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; min-width: 48px; padding: 0 14px;
  border-radius: var(--bz-r-small); text-decoration: none; font-size: 15px;
}
.bz-tabs a:hover { background: var(--bz-surface); color: var(--bz-ink); }
.bz-tabs a { position: relative; }
.bz-tabs a[aria-current="page"] { font-weight: 700; color: var(--bz-ink); }
.bz-tabs a[aria-current="page"]::after {
  content: ""; position: absolute; left: 50%; bottom: 3px; width: 24px; height: 10px;
  border: 3px solid var(--bz-tomato); border-top: 0; border-radius: 0 0 24px 24px;
  transform: translateX(-50%);
}

.bz-main { max-width: 1180px; margin: 0 auto; padding: 8px var(--bz-gutter) 56px; }

.bz-h1 {
  font-size: 37px; line-height: 1.32; margin: 0 0 14px; font-weight: 700;
  line-break: strict; text-wrap: balance; letter-spacing: 0;
}

/* 首页首屏：拇指热区 */
.bz-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: 22px;
  align-items: stretch;
}
.bz-hero-text { padding: 26px 8px 8px 4px; display: flex; flex-direction: column; }
.bz-lede { font-size: 17px; color: var(--bz-mute); margin: 0 0 22px; max-width: 30em; }
.bz-pick {
  margin-top: auto; background: var(--bz-surface); border-radius: var(--bz-r-big) var(--bz-r-big) var(--bz-r-big) var(--bz-r-small);
  padding: 20px 24px 18px; border: 1px solid var(--bz-line);
}
.bz-pick-tag { margin: 0 0 4px; font-size: 14px; color: var(--bz-tomato-deep); font-weight: 700; }
.bz-pick-link { display: inline-block; font-size: 19px; font-weight: 700; line-height: 1.5; padding: 4px 0; min-height: 44px; }
.bz-pick-why { margin: 6px 0 0; font-size: 15px; color: var(--bz-mute); }

.bz-reach {
  position: relative; min-height: 548px; border-radius: var(--bz-r-big); overflow: hidden;
  background:
    radial-gradient(circle at 100% 100%,
      var(--bz-cream) 0 400px,
      var(--bz-tomato) 400px 404px,
      var(--bz-blush) 404px 580px,
      var(--bz-line) 580px 582px,
      var(--bz-surface) 582px);
}
.bz-reach > span {
  position: absolute; font-size: 14px; font-weight: 700; line-height: 1.3;
  padding: 4px 10px; border-radius: var(--bz-r-small);
}
.bz-reach-far { left: 22px; top: 20px; color: var(--bz-mute); background: var(--bz-surface); border: 1px dashed var(--bz-line); }
.bz-reach-mid { left: 92px; top: 186px; color: var(--bz-ink); background: var(--bz-blush); }
.bz-reach-near { right: 30px; top: 192px; color: var(--bz-ink); background: var(--bz-cream); border: 2px solid var(--bz-tomato); }

/* 码卡 */
.bz-pad {
  background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 20px 22px 16px;
  border: 2px solid var(--bz-ink); box-shadow: 0 10px 0 -4px var(--bz-ink);
}
.bz-pad--home { position: absolute; right: 24px; bottom: 30px; width: 344px; }
.bz-pad-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.bz-pad-tag { font-size: 14px; color: var(--bz-mute); width: 100%; }
.bz-pad-code {
  font-size: 34px; letter-spacing: 2px; font-weight: 700; line-height: 1.2;
  user-select: all; -webkit-user-select: all;
}
.bz-copy {
  margin-left: auto; min-height: 44px; min-width: 76px; padding: 0 18px;
  border: 0; border-radius: var(--bz-r-small); background: var(--bz-ink); color: var(--bz-cream);
  font: inherit; font-size: 16px; font-weight: 700; cursor: pointer;
}
.bz-copy:hover { background: #24384a; }
.bz-pad-note { margin: 10px 0 0; font-size: 14px; line-height: 1.65; color: var(--bz-ink); }
.bz-pad-live { margin: 4px 0 0; min-height: 0; font-size: 13px; color: var(--bz-mute); }
.bz-pad-live:empty { display: none; }
.bz-go {
  display: flex; align-items: center; justify-content: center; text-align: center;
  margin: 14px 0 0; min-height: 52px; padding: 8px 16px;
  background: var(--bz-tomato); color: var(--bz-ink); text-decoration: none;
  border-radius: var(--bz-r-small); font-size: 19px; font-weight: 700; line-height: 1.35; text-wrap: balance;
}
.bz-go:hover { background: #ea6a4c; color: var(--bz-ink); }
.bz-pad-say { margin: 10px 0 0; font-size: 13px; line-height: 1.65; color: var(--bz-mute); }
.bz-pad-say a { display: inline-block; min-height: 44px; line-height: 44px; }

/* 首页正文块 */
.bz-homebody { max-width: 860px; margin: 40px auto 0; }
.bz-block {
  background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 28px 32px 22px; margin: 0 0 18px;
}
.bz-block h2 { font-size: 22px; line-height: 1.4; margin: 0 0 10px; line-break: strict; text-wrap: balance; }
.bz-block p, .bz-block li { max-width: 38em; }
.bz-block ul { padding-left: 1.2em; }
.bz-block li { margin: 0 0 6px; }
.bz-cards { list-style: none; padding: 0; margin: 0; }
.bz-cardline { border-top: 1px solid var(--bz-line); padding: 14px 0 4px; }
.bz-cardline a { font-size: 18px; font-weight: 700; display: inline-block; min-height: 44px; padding-top: 6px; }
.bz-cardline p { margin: 4px 0; color: var(--bz-mute); font-size: 15px; }
.bz-cardline-date { font-size: 14px; }
.bz-shelf-more a { display: inline-flex; align-items: center; min-height: 44px; }

/* 面包屑 */
.bz-crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 6px; font-size: 14px; color: var(--bz-mute); margin: 4px 0 8px; }
.bz-crumbs a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; }
.bz-crumbs a, .bz-byline a { min-width: 44px; justify-content: center; }

/* 文章页 */
.bz-readhead { max-width: 860px; margin: 8px 0 18px; }
.bz-byline { font-size: 14px; color: var(--bz-mute); }
.bz-byline a { display: inline-flex; align-items: center; min-height: 44px; }
.bz-byline-gap { display: inline-block; width: 1.4em; }
.bz-cover { margin: 0 0 26px; max-width: 860px; }
.bz-cover img { border-radius: var(--bz-r-big); }
.bz-cover figcaption { font-size: 13px; color: var(--bz-mute); margin-top: 8px; }

.bz-readgrid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 30px; align-items: start; }
.bz-prose {
  grid-column: 1; grid-row: 1;
  background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 34px 40px 28px; min-width: 0;
}
.bz-toc {
  grid-column: 2; grid-row: 1; position: sticky; top: 16px;
  background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 14px 18px;
}
.bz-toc summary { cursor: pointer; font-weight: 700; min-height: 44px; display: flex; align-items: center; font-size: 15px; }
.bz-toc-list { list-style: none; margin: 4px 0 0; padding: 0; counter-reset: bzt; }
.bz-toc-list li { counter-increment: bzt; border-top: 1px solid var(--bz-line); }
.bz-toc-list a {
  display: flex; gap: 8px; align-items: center; min-height: 44px; padding: 6px 0;
  font-size: 14px; line-height: 1.5; text-decoration: none;
}
.bz-toc-list a::before {
  content: counter(bzt); flex: none; width: 24px; height: 24px; border-radius: 0 0 0 24px;
  background: var(--bz-cream); border-left: 2px solid var(--bz-tomato); border-bottom: 2px solid var(--bz-tomato);
  font-family: var(--bz-latin); font-size: 13px; display: flex; align-items: center; justify-content: center;
}

.bz-prose > p, .bz-prose li, .bz-screen-body p { max-width: 38em; }
.bz-prose p { margin: 0 0 1em; }
.bz-prose h2 {
  font-size: 24px; line-height: 1.45; margin: 2em 0 0.7em; padding-top: 4px;
  line-break: strict; text-wrap: balance; position: relative; padding-left: 34px;
  scroll-margin-top: 16px;
}
.bz-prose h2::before {
  content: ""; position: absolute; left: 0; top: 10px; width: 22px; height: 22px;
  border-top-left-radius: 22px; border-top: 3px solid var(--bz-tomato); border-left: 3px solid var(--bz-tomato);
  background: radial-gradient(circle at 100% 100%, var(--bz-cream) 0 11px, transparent 12px);
}
.bz-prose h2:first-child { margin-top: 0.4em; }
.bz-prose h3 { font-size: 19px; line-height: 1.5; margin: 1.5em 0 0.5em; }
.bz-prose ul, .bz-prose ol { padding-left: 1.3em; }
.bz-prose li { margin-bottom: 0.4em; }
.bz-prose strong { background: linear-gradient(transparent 62%, var(--bz-cream) 62%); }

.bz-screen {
  display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 18px;
  margin: 1.4em 0; padding: 18px 0 6px; border-top: 2px solid var(--bz-ink);
}
.bz-screen-no {
  writing-mode: vertical-rl; text-orientation: upright;
  background: var(--bz-ink); color: var(--bz-cream); border-radius: var(--bz-r-small);
  font-weight: 700; font-size: 16px; letter-spacing: 3px;
  display: flex; align-items: center; justify-content: flex-start; padding: 14px 0; min-height: 120px;
  align-self: start; width: 46px;
}
.bz-screen-body h3 { margin-top: 0; }
.bz-screen--pre .bz-screen-no { background: var(--bz-cream); color: var(--bz-ink); box-shadow: inset 0 0 0 2px var(--bz-ink); }

.bz-shot { margin: 1.2em 0 1.4em; }
.bz-shot img { border-radius: var(--bz-r-small); border: 1px solid var(--bz-line); background: #fff; }
.bz-shot--tall img { max-width: 360px; }
.bz-shot figcaption { font-size: 13px; color: var(--bz-mute); margin-top: 8px; max-width: 38em; line-height: 1.65; }

.bz-note {
  margin: 1.4em 0; padding: 16px 20px 6px; border-radius: var(--bz-r-small);
  background: var(--bz-cream); border-left: 6px solid var(--bz-tomato);
}
.bz-note--calm { background: #eef3f7; border-left-color: var(--bz-ink); }
.bz-note-head { font-weight: 700; margin: 0 0 6px; }

.bz-tablewrap { overflow-x: auto; margin: 1.2em 0 1.6em; border-radius: var(--bz-r-small); border: 1px solid var(--bz-line); background: #fff; }
.bz-tablewrap:focus-visible { outline-offset: 2px; }
.bz-table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 15px; line-height: 1.65; }
.bz-table th, .bz-table td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--bz-line); }
.bz-table thead th { background: var(--bz-ink); color: var(--bz-cream); font-weight: 700; white-space: nowrap; }
.bz-table tbody th { font-weight: 700; background: #fbfcfd; min-width: 9em; }
.bz-table tbody tr:last-child th, .bz-table tbody tr:last-child td { border-bottom: 0; }

.bz-prose .bz-pad { margin: 1.6em 0; max-width: 460px; }

.bz-faq { max-width: 860px; margin: 30px 0 0; background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 26px 34px 14px; }
.bz-faq h2 { font-size: 22px; margin: 0 0 8px; }
.bz-qa { border-top: 1px solid var(--bz-line); padding: 10px 0 2px; }
.bz-qa h3 { font-size: 17px; margin: 6px 0 4px; line-height: 1.55; }
.bz-qa p { margin: 0 0 10px; max-width: 38em; }

.bz-after { max-width: 860px; margin: 22px 0 0; display: grid; gap: 14px; }
.bz-chips { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bz-chips-tag { font-size: 14px; color: var(--bz-mute); }
.bz-chip { display: inline-flex; align-items: center; min-height: 36px; padding: 0 14px; border-radius: 999px; background: var(--bz-surface); font-size: 14px; border: 1px solid var(--bz-line); }
.bz-next { background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 18px 26px 10px; }
.bz-next-h { margin: 0; font-weight: 700; }
.bz-next ul { list-style: none; padding: 0; margin: 4px 0 0; }
.bz-next a { display: inline-flex; align-items: center; min-height: 44px; }
.bz-who { font-size: 14px; color: var(--bz-mute); padding: 0 6px; }
.bz-who p { margin: 0; max-width: 46em; }

/* 列表页 */
.bz-listhead { max-width: 860px; margin: 8px 0 18px; }
.bz-listintro p { margin: 0 0 0.8em; max-width: 38em; color: var(--bz-ink); }
.bz-count { font-size: 14px; color: var(--bz-mute); margin: 0; }
.bz-rows { list-style: none; padding: 0; margin: 0; max-width: 860px; }
.bz-row { background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 20px 28px 12px; margin: 0 0 12px; }
.bz-row-t { display: inline-block; font-size: 19px; font-weight: 700; line-height: 1.5; min-height: 44px; padding-top: 6px; }
.bz-row-d { margin: 4px 0; color: var(--bz-mute); font-size: 15px; max-width: 38em; }
.bz-row-m { margin: 0; font-size: 14px; color: var(--bz-mute); }
.bz-flip { display: flex; gap: 14px; align-items: center; margin: 18px 0; }
.bz-flip a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px; border-radius: var(--bz-r-small); background: var(--bz-surface); }

/* 站务页 */
.bz-plain { max-width: 860px; background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 32px 40px 24px; }
.bz-plain p, .bz-plain li { max-width: 38em; }
.bz-plain h2 { font-size: 21px; line-height: 1.45; margin: 1.6em 0 0.5em; }
.bz-plain-date { font-size: 14px; color: var(--bz-mute); margin-top: 1.6em; }

/* 搜索 */
.bz-main--find { max-width: 860px; }
.bz-find label { display: block; font-weight: 700; margin-bottom: 6px; }
.bz-find-row { display: flex; gap: 8px; }
.bz-find input {
  flex: 1; min-width: 0; min-height: 48px; font: inherit; font-size: 17px;
  padding: 0 16px; border-radius: var(--bz-r-small); border: 2px solid var(--bz-ink); background: var(--bz-surface); color: var(--bz-ink);
}
.bz-find button {
  min-height: 48px; min-width: 64px; border: 0; border-radius: var(--bz-r-small);
  background: var(--bz-ink); color: var(--bz-cream); font: inherit; font-weight: 700; cursor: pointer;
}
.bz-find-state { color: var(--bz-mute); font-size: 15px; }
.bz-hit mark { background: var(--bz-cream); color: inherit; }

/* 404 */
.bz-lost { max-width: 720px; background: var(--bz-surface); border-radius: var(--bz-r-big); padding: 34px 38px 20px; margin-top: 24px; }
.bz-lost-go { list-style: none; padding: 0; }
.bz-lost-go a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; }

/* 页脚 */
.bz-foot { background: var(--bz-ink); color: #dfe7ee; margin-top: 30px; }
.bz-foot a { color: #f7fafc; text-decoration-color: var(--bz-tomato); }
.bz-foot a:hover { color: var(--bz-cream); }
.bz-foot-in { max-width: 1180px; margin: 0 auto; padding: 30px var(--bz-gutter) 26px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 10px 36px; }
.bz-foot .bz-home { background: var(--bz-surface); border-radius: var(--bz-r-small); padding: 4px 10px; }
.bz-foot-say { margin: 10px 0 0; font-size: 14px; line-height: 1.7; max-width: 34em; }
.bz-foot-say a { display: inline-block; padding: 11px 0; }
.bz-foot-links { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; align-content: start; }
.bz-foot-links a { display: flex; align-items: center; width: 100%; min-width: 44px; min-height: 44px; font-size: 14px; }
.bz-foot-year { grid-column: 1 / -1; margin: 6px 0 0; font-size: 13px; color: #c3cfd9; }

@media (max-width: 960px) {
  .bz-readgrid { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .bz-toc { grid-column: 1; grid-row: 1; position: static; }
  .bz-prose { grid-column: 1; grid-row: 2; }
}

@media (max-width: 860px) {
  .bz-hero { grid-template-columns: minmax(0, 1fr); gap: 0; position: relative; }
  .bz-reach { min-height: 0; overflow: visible; background: none; position: static; }
  .bz-pad--home { position: relative; right: auto; bottom: auto; width: auto; margin: 14px 0 0; }
}

@media (max-width: 600px) {
  body { font-size: 16px; line-height: 1.75; }
  .bz-top-in { padding: 6px 10px 4px 12px; gap: 4px; }
  .bz-mark { width: 104px; height: 29px; }
  .bz-tabs ul { gap: 0; }
  .bz-tabs a { padding: 0 9px; min-width: 44px; font-size: 15px; }
  .bz-main { padding: 4px var(--bz-gutter) 40px; }
  .bz-h1 { font-size: 24px; line-height: 1.42; margin-bottom: 8px; }
  .bz-hero {
    margin: 0 calc(var(--bz-gutter) * -1); padding: 6px 42px 18px var(--bz-gutter);
    background:
      radial-gradient(circle at 100% 100%,
        var(--bz-cream) 0 262px,
        var(--bz-tomato) 262px 265px,
        var(--bz-blush) 265px 400px,
        var(--bz-line) 400px 402px,
        transparent 402px);
  }
  .bz-hero-text { padding: 4px 0 0; }
  .bz-lede { font-size: 15px; line-height: 1.7; margin-bottom: 12px; }
  .bz-pick { padding: 12px 16px 10px; border-radius: 24px 24px 24px var(--bz-r-small); }
  .bz-pick-tag { font-size: 13px; }
  .bz-pick-link { font-size: 16px; line-height: 1.45; }
  .bz-pick-why { display: none; }
  .bz-reach > span {
    right: 6px; left: auto; writing-mode: vertical-rl; letter-spacing: 2px;
    font-size: 13px; padding: 8px 4px; border-radius: 12px;
  }
  .bz-reach-far { top: 8px; bottom: auto; }
  .bz-reach-mid { top: auto; bottom: 296px; }
  .bz-reach-near { top: auto; bottom: 182px; }
  .bz-pad--home { margin: 12px -26px 0 0; padding: 12px 16px 10px; border-radius: 26px; }
  .bz-pad-code { font-size: 28px; }
  .bz-pad-tag { font-size: 13px; }
  .bz-pad-note { font-size: 13px; margin-top: 6px; }
  .bz-homebody { margin-top: 26px; }
  .bz-block { padding: 22px 18px 14px; border-radius: 24px; }
  .bz-block h2 { font-size: 20px; }
  .bz-readhead { margin-top: 0; }
  .bz-cover { margin: 0 calc(var(--bz-gutter) * -1) 18px; }
  .bz-cover img { border-radius: 0; }
  .bz-cover figcaption { padding: 0 var(--bz-gutter); }
  .bz-prose { padding: 22px 16px 14px; border-radius: 24px; margin: 0 -6px; }
  .bz-prose h2 { font-size: 20px; padding-left: 30px; }
  .bz-prose h2::before { width: 18px; height: 18px; top: 8px; }
  .bz-prose h3 { font-size: 17px; }
  .bz-screen { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .bz-screen-no { width: 34px; font-size: 14px; letter-spacing: 2px; min-height: 100px; }
  .bz-shot--tall img { max-width: 100%; }
  .bz-faq { padding: 20px 16px 8px; border-radius: 24px; }
  .bz-next { padding: 14px 18px 6px; }
  .bz-row { padding: 16px 18px 10px; border-radius: 24px; }
  .bz-plain { padding: 22px 18px 16px; border-radius: 24px; }
  .bz-lost { padding: 24px 18px 14px; }
  .bz-foot-in { grid-template-columns: minmax(0, 1fr); }
  .bz-table { font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}